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Dr. Keith Baar is a Professor at the University of California, Davis in the Department of Physiology and Membrane Biology. During his Ph.D. studies, his research revealed that mechanical strain on muscle fibers activates the mammalian target of rapamycin (mTOR) signaling pathway, a crucial regulator of muscular hypertrophy. Subsequently, he studied the molecular dynamics of skeletal muscle adaptation to endurance training under the guidance of Dr. John Holloszy, a legend in the field of exercise physiology, considered the father of modern exercise biochemistry. Building on all of this experience, he conducted research into tendon health and the potential for engineering ligaments, which could have implications for treatment and recovery from injuries.Sponsors:Cresset prestigious family office for CEOs, founders, and entrepreneurs: https://cressetcapital.com/tim (book a call today)AG1 all-in-one nutritional supplement: https://DrinkAG1.com/Tim (1-year supply of Vitamin D (and 5 free AG1 travel packs) with your first subscription purchase.)Shopify global commerce platform, providing tools to start, grow, market, and manage a retail business: https://shopify.com/tim (one-dollar-per-month trial period)*Links to everything discussed: https://tim.blog/2025/02/26/dr-keith-baar/Timestamps:[00:00:00] Start [00:07:12] How I discovered Keith's work through a tweet about tennis elbow and rock climbing.[00:07:54] Emil Abrahamsson's hangboard training protocol.[00:09:20] The fundamental principles of strength training and connective tissue adaptation.[00:10:36] mTOR complex 1 and its role in muscle growth.[00:12:06] Engineered ligaments and the discovery of minimal effective doses for tendon adaptation.[00:13:50] The refractory period between optimal tendon loading sessions.[00:16:42] Rapamycin's effects on muscle hypertrophy.[00:18:49] Protocols for tennis elbow rehabilitation.[00:20:28] Why isometrics work better than eccentrics for tendon healing.[00:22:14] Stress shielding and how load distribution affects tendon healing.[00:29:07] The misconception about eccentric loading for tendon injuries and why velocity matters.[00:29:58] Ideal duration for isometric holds (10-30 seconds) based on injury status.[00:33:50] My elbow issues and current rehab approach.[00:36:02] Overcoming vs. yielding isometrics and optimal loading strategies.[00:47:11] Dr. Barr's movement prescription for my tennis elbow.[00:52:18] Loading timing post-surgery and RICE protocol criticism.[00:56:58] Achilles tendon rehabilitation after surgery.[01:00:18] Critique of orthopedic suturing techniques and recommendation for resorbable sutures.[01:04:02] Multiple position isometrics for tennis elbow rehabilitation.[01:07:26] Collagen synthesis, supplementation, and vitamin C timing.[01:12:59] Critique of BPC-157 and other injectable peptides for tendon healing.[01:18:19] Evaluation of orthobiologics' (PRP, prolotherapy, stem cells) effectiveness.[01:21:37] JAK-STAT inhibitor drugs and their effects on tendon growth.[01:25:35] Drugs that increase risk of tendon ruptures (fluoroquinolones, AT-1 receptor drugs).[01:29:33] How estrogen affects tendon stiffness and injury risk in women.[01:32:48] Testosterone's opposite effects on tendon compared to estrogen.[01:35:31] Protein intake recommendations and timing.[01:40:11] Ketogenic diet effects on mitochondrial biogenesis and longevity.[01:41:57] Comparison of ketogenic diet, low protein diet, and rapamycin for longevity.[01:47:19] Inflammation's role in adaptation and when to reduce it.[01:51:17] Timing of ice baths relative to training for optimal recovery.[01:52:33] Parting thoughts.*For show notes and past guests on The Tim Ferriss Show, please visit tim.blog/podcast.For deals from sponsors of The Tim Ferriss Show, please visit tim.blog/podcast-sponsorsSign up for Tim's email newsletter (5-Bullet Friday) at tim.blog/friday.For transcripts of episodes, go to tim.blog/transcripts.Discover Tim's books: tim.blog/books.Follow Tim:Twitter: twitter.com/tferriss Instagram: instagram.com/timferrissYouTube: youtube.com/timferrissFacebook: facebook.com/timferriss LinkedIn: linkedin.com/in/timferrissPast guests on The Tim Ferriss Show include Jerry Seinfeld, Hugh Jackman, Dr. Jane Goodall, LeBron James, Kevin Hart, Doris Kearns Goodwin, Jamie Foxx, Matthew McConaughey, Esther Perel, Elizabeth Gilbert, Terry Crews, Sia, Yuval Noah Harari, Malcolm Gladwell, Madeleine Albright, Cheryl Strayed, Jim Collins, Mary Karr, Maria Popova, Sam Harris, Michael Phelps, Bob Iger, Edward Norton, Arnold Schwarzenegger, Neil Strauss, Ken Burns, Maria Sharapova, Marc Andreessen, Neil Gaiman, Neil de Grasse Tyson, Jocko Willink, Daniel Ek, Kelly Slater, Dr. Peter Attia, Seth Godin, Howard Marks, Dr. Brené Brown, Eric Schmidt, Michael Lewis, Joe Gebbia, Michael Pollan, Dr. Jordan Peterson, Vince Vaughn, Brian Koppelman, Ramit Sethi, Dax Shepard, Tony Robbins, Jim Dethmer, Dan Harris, Ray Dalio, Naval Ravikant, Vitalik Buterin, Elizabeth Lesser, Amanda Palmer, Katie Haun, Sir Richard Branson, Chuck Palahniuk, Arianna Huffington, Reid Hoffman, Bill Burr, Whitney Cummings, Rick Rubin, Dr. Vivek Murthy, Darren Aronofsky, Margaret Atwood, Mark Zuckerberg, Peter Thiel, Dr. Gabor Maté, Anne Lamott, Sarah Silverman, Dr. Andrew Huberman, and many more.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.
Stephanie Venn-Watson, a marine biologist, discusses her research on dolphins and the discovery of Fatty15, a 15-carbon saturated fat that plays a crucial role in cellular health and longevity. The research in dolphins has implications for human health and longevity. The conversation explores the role of fatty acid C:15 in various health conditions, including liver damage, neurodegenerative diseases, anemia, and cardiovascular health. The researchers discuss how C:15 deficiency can lead to iron overload in the liver, causing lipid peroxidation and insulin resistance. They also highlight the potential benefits of C:15 in improving brain health, reducing neuroinflammation, and supporting the immune system. The conversation concludes with a discussion on ongoing research projects and the potential applications of C:15 in various health conditions. For the audience * Use code GLADDEN for 15% OFF your Fatty15 at fatty15.com/GLADDEN * Use the code 'Podcast10' to get 10% OFF your order at our supplement store → https://gladdenlongevityshop.com/ Takeaways * Dolphins with higher levels of C:15, a 15-carbon saturated fat, have slower aging rates and better overall health. * C:15 protects cell membranes from lipid peroxidation and improves cellular signaling and energy production. * C:15 inhibits JAK-STAT, reducing inflammation and cancer cell proliferation. * Higher levels of C:15 are associated with a lower risk of cardiovascular disease. * Supplementing with C:15 can attenuate the symptoms of liver damage and non-alcoholic fatty liver disease. * C:15 may have potential benefits in improving brain health and reducing neuroinflammation. * C:15 supplementation may help improve cardiovascular capacity and support the immune system. * Ongoing research is exploring the effects of C:15 on anemia and Alzheimer's disease. Chapters 00:00 Dosing and Linear Dose Response of Fatty15 23:06 Exploring the Impact of C:15 on Liver Health and Metabolic Syndrome 24:59 C:15's Role in Addressing Neurodegenerative Diseases and Cognitive Improvement 28:01 The Link Between C:15 and Cardiovascular Capacity, Anemia, and Immune System Function 32:42 C:15- Cellular Health, Longevity, and Well-being 46:02 Goodbye To learn more about Fatty15: * Websites: www.DiscoverC15.com * www.fatty15.com * Instagram: (@fatty15) https://www.instagram.com/fatty15/ Reach out to us! Website: https://gladdenlongevity.com/ Email: podcast@gladdenlongevity.com Facebook: https://www.facebook.com/Gladdenlongevity/ Instagram: https://www.instagram.com/gladdenlongevity/?hl=en LinkedIn: https://www.linkedin.com/company/gladdenlongevity YouTube: https://www.youtube.com/channel/UC5_q8nexY4K5ilgFnKm7naw
In this episode of Derms and Conditions, host James Del Rosso, DO, is joined by Jason Hawkes, MD, a dermatologist and investigator at the Medical Research Center of Oregon, to discuss tyrosine kinase 2 (TYK2) inhibitors, particularly deucravacitinib, for plaque psoriasis. They explain how deucravacitinib, which targets the TYK2 pathway, differs from other JAK inhibitors by avoiding the "off-target" effects associated with JAK 1, 2, and 3 inhibitors, offering a more selective and safe treatment option. They begin by discussing the JAK-STAT pathway, with Dr Hawkes noting that while the science behind it was well known, TYK2's role in psoriasis took time to fully understand. TYK2 regulates key cytokines like IL-12, IL-23, and type 1 interferons, which are critical in psoriasis and psoriatic arthritis. Its more focused role within the immune response reduces the risk of systemic side effects compared to broader-acting JAK inhibitors. They also explore deucravacitinib's selectivity, which targets the pseudokinase domain of TYK2, offering greater precision compared to inhibitors that target the ATP-binding domain shared by other JAKs. This selectivity results in deucravacitinib's cleaner safety profile, reflected in the lack of a boxed warning and minimal monitoring requirements. Finally, they review long-term data, noting deucravacitinib's superior efficacy to apremilast and a stable safety profile over four years. While some safety signals, like herpetic infections, slightly increased over time, most adverse events were stable or decreased. They conclude by discussing the importance of personalized treatment decisions, emphasizing deucravacitinib's advantages for patients who prefer oral medications and want to avoid injections. Tune in to the full episode for a comprehensive discussion on the clinical relevance of TYK2 inhibitors and the role of deucravacitinib in the psoriasis treatment landscape.
BUFFALO, NY- February 7, 2024 – A new #research perspective was #published in Oncotarget's Volume 15 on February 5, 2024, entitled, “Preclinical and clinical evaluation of the Janus Kinase inhibitor ruxolitinib in multiple myeloma.” In this new paper, researchers Ashley Del Dosso, Elizabeth Tadevosyan, and James R. Berenson from ONCOtherapeutics, Berenson Cancer Center, and Institute for Myeloma and Bone Cancer Research discussed multiple myeloma (MM) — the most common primary malignancy of the bone marrow. No established curative treatment is currently available for patients diagnosed with MM. In recent years, new and more effective drugs have become available for the treatment of this B-cell malignancy. These new drugs have often been evaluated together and in combination with older agents. However, even these novel combinations eventually become ineffective; and, thus, novel therapeutic approaches are necessary to help overcome resistance to these treatments. Recently, the Janus Kinase (JAK) family of tyrosine kinases, specifically JAK1 and JAK2, has been shown to have a role in the pathogenesis of MM. Preclinical studies have demonstrated a role for JAK signaling in direct and indirect growth of MM and downregulation of anti-tumor immune responses in these patients. Also, inhibition of JAK proteins enhances the anti-MM effects of other drugs used to treat MM. These findings have been confirmed in clinical studies which have further demonstrated the safety and efficacy of JAK inhibition as a means to overcome resistance to currently available anti-MM therapies. Additional studies will provide further support for this promising new therapeutic approach for treating patients with MM. “The following sections of this article will be focused on studies of RUX [Ruxolitinib] in the preclinical [21–24] and clinical settings [18–20] focused on the treatment of relapsed/refractory (RR) MM.” DOI - https://doi.org/10.18632/oncotarget.28547 Correspondence to - James R. Berenson - jberenson@berensoncancercenter.com Sign up for free Altmetric alerts about this article - https://oncotarget.altmetric.com/details/email_updates?id=10.18632%2Foncotarget.28547 Subscribe for free publication alerts from Oncotarget - https://www.oncotarget.com/subscribe/ Keywords - cancer, multiple myeloma, ruxolitinib, JAK/STAT, cytokine, clinical trial About Oncotarget Oncotarget (a primarily oncology-focused, peer-reviewed, open access journal) aims to maximize research impact through insightful peer-review; eliminate borders between specialties by linking different fields of oncology, cancer research and biomedical sciences; and foster application of basic and clinical science. To learn more about Oncotarget, please visit https://www.oncotarget.com and connect with us: Facebook - https://www.facebook.com/Oncotarget/ X - https://twitter.com/oncotarget Instagram - https://www.instagram.com/oncotargetjrnl/ YouTube - https://www.youtube.com/@OncotargetJournal LinkedIn - https://www.linkedin.com/company/oncotarget Pinterest - https://www.pinterest.com/oncotarget/ Reddit - https://www.reddit.com/user/Oncotarget/ Spotify - https://open.spotify.com/show/0gRwT6BqYWJzxzmjPJwtVh Media Contact MEDIA@IMPACTJOURNALS.COM 18009220957
BUFFALO, NY- January 29, 2024 – A new #research perspective was #published in Oncotarget's Volume 15 on January 24, 2024, entitled, “Genetic alterations in thyroid cancer mediating both resistance to BRAF inhibition and anaplastic transformation.” In this new paper, researchers Mark Lee and Luc GT Morris from New York Presbyterian Hospital and Memorial Sloan Kettering Cancer Center discuss thyroid cancer. A subset of thyroid cancers present at advanced stage or with dedifferentiated histology and have limited response to standard therapy. Tumors harboring the BRAF V600E mutation may be treated with BRAF inhibitors; however, tumor response is often short-lived due to multiple compensatory resistance mechanisms. “One mode of resistance is the transition to an alternative cell state, which on rare occasions can correspond to tumor dedifferentiation.” DNA sequencing and RNA expression profiling show that thyroid tumors that dedifferentiate after BRAF inhibition are enriched in known genetic alterations that mediate resistance to BRAF blockade, and may also drive tumor dedifferentiation, including mutations in the PI3K/AKT/MTOR (PIK3CA, MTOR), MAP/ERK (MET, NF2, NRAS, RASA1), SWI/SNF chromatin remodeling complex (ARID2, PBRM1), and JAK/STAT pathways (JAK1). Given these findings, recent investigations have evaluated the efficacy of dual-target therapies; however, continued lack of long-term tumor control illustrates the complex and multifactorial nature of these compensatory mechanisms. Transition to an immune-suppressed state is another correlate of BRAF inhibitor resistance and tumor dedifferentiation, suggesting a possible role for concurrent targeted therapy with immunotherapy. “Investigations into combined targeted and immunotherapy are ongoing, but early results with checkpoint inhibitors, viral therapies, and CAR T-cells suggest enhanced anti-tumor immune activity with these combinations.” DOI - https://doi.org/10.18632/oncotarget.28544 Correspondence to - Luc GT Morris - morrisl@mskcc.org Sign up for free Altmetric alerts about this article - https://oncotarget.altmetric.com/details/email_updates?id=10.18632%2Foncotarget.28544 Subscribe for free publication alerts from Oncotarget - https://www.oncotarget.com/subscribe/ Keywords - cancer, thyroid cancer, drug resistance, anaplastic transformation, BRAF inhibitors, PIK3CA About Oncotarget Oncotarget (a primarily oncology-focused, peer-reviewed, open access journal) aims to maximize research impact through insightful peer-review; eliminate borders between specialties by linking different fields of oncology, cancer research and biomedical sciences; and foster application of basic and clinical science. To learn more about Oncotarget, please visit https://www.oncotarget.com and connect with us: Facebook - https://www.facebook.com/Oncotarget/ X - https://twitter.com/oncotarget Instagram - https://www.instagram.com/oncotargetjrnl/ YouTube - https://www.youtube.com/@OncotargetJournal LinkedIn - https://www.linkedin.com/company/oncotarget Pinterest - https://www.pinterest.com/oncotarget/ Reddit - https://www.reddit.com/user/Oncotarget/ Spotify - https://open.spotify.com/show/0gRwT6BqYWJzxzmjPJwtVh Media Contact MEDIA@IMPACTJOURNALS.COM 18009220957
Dermatologist Professor Kiran Godse joins Professor Marcus Maurer to explore the use of JAK and STAT inhibitors in the management of chronic urticaria and how these drugs may impact quality of life for people with this condition. Do you have suggestions for future episodes? Please provide feedback and offer your suggestions for future topics and expert selection here. Utilise the following external links to access additional resources relating to the topics discussed in this episode: Role of IL-9 and IL-10 in the pathogenesis of chronic spontaneous urticaria through the JAK/STAT signalling pathway and Efficacy of Oral Ruxolitinib in a Patient with Refractory Chronic Spontaneous Urticaria. Access additional resources by signing up to Medthority and to be notified for future 'All Things Urticaria' podcast episodes! For more information about the UCARE/ACARE network and its activities, please visit: UCARE Website, UCARE LevelUp Program, ACARE Website, UCARE 4U Website, UDAY Website, CRUSE Control App and CURE Registry
Link to bioRxiv paper: http://biorxiv.org/cgi/content/short/2023.07.21.549904v1?rss=1 Authors: Clancy, A., Rusilowicz-Jones, E. V., Wallace, I., Swatek, K. N., Urbe, S., Clague, M. J. Abstract: Type 1 interferon stimulation highly up-regulates all elements of a ubiquitin-like conjugation system that leads to ISGylation of target proteins. An ISG15-specific member of the deubiquitylase family, USP18, is up-regulated in a co-ordinated manner. USP18 can also provide a negative feedback by inhibiting JAK-STAT signaling through protein interactions independently of DUB activity. Here, we provide an acute example of this phenomenon, whereby the early expression of USP18, post-interferon treatment of HCT116 colon cancer cells is sufficient to fully suppress the expression of the ISG15 E1 enzyme, UBA7. Stimulation of lung adenocarcinoma A549 cells with interferon reduces their growth rate but they remain viable. In contrast, A549 USP18 knock-out cells show similar growth characteristics under basal conditions, but upon interferon stimulation a profound inhibition of cell growth is observed. We show that this contingency on USP18 is independent of ISGylation, suggesting non catalytic functions are required for viability. We also demonstrate that global deISGylation kinetics are very slow compared with deubiquitylation. This is not influenced by USP18 expression, suggesting that enhanced ISGylation in USP18 KO cells reflects increased conjugating activity. Copy rights belong to original authors. Visit the link for more info Podcast created by Paper Player, LLC
Link to bioRxiv paper: http://biorxiv.org/cgi/content/short/2023.06.26.546513v1?rss=1 Authors: Spits, C., Lei, Y., Al Delbany, D., Krivec, N., Regin, M., Couvreu de Deckersberg, E., Janssens, C., Ghosh, M., Sermon, K. D. Abstract: Human pluripotent stem cell (hPSC) cultures are prone to genetic drift, as cells that have acquired specific genetic abnormalities experience a selective advantage in vitro. These abnormalities are highly recurrent in hPSC lines worldwide, but currently their functional consequences in differentiating cells are scarcely described. An accurate assessment of the risk associated with these genetic variants in both research and clinical settings is therefore lacking. In this work, we established that one of these recurrent abnormalities, the loss of chromosome 18q, impairs neuroectoderm commitment and affects the cardiac progenitor differentiation of hESCs. We show that downregulation of SALL3, a gene located in the common 18q loss region, is responsible for failed neuroectodermal differentiation. Knockdown of SALL3 in control lines impaired differentiation in a manner similar to the loss of 18q, while transgenic overexpression of SALL3 in hESCs with 18q loss rescued the differentiation capacity of the cells. Finally, we show by gene expression analysis that loss of 18q and downregulation of SALL3 leads to changes in the expression of genes involved in pathways regulating pluripotency and differentiation, including the WNT, NOTCH, JAK-STAT, TGF-beta and NF-kB pathways, suggesting that these cells are in an altered state of pluripotency. Copy rights belong to original authors. Visit the link for more info Podcast created by Paper Player, LLC
TRANSCRIPTEric Topol (00:00):Hello, this is Eric Topol, and it's really a delight for me to welcome Hannah Davis who was the primary author of our recent review on Long Covid and is a co-founder of the Patient-Led Research Collaborative. And we're going to get into some really important topics about citizen science, Long Covid and related matters. So, Hannah, welcome.Hannah Davis (00:27):Thank you so much for having me.Eric Topol (00:29):Well, Hannah, before we get into it I thought because you had a very interesting background before you got into the patient led research collaborative organization with graphics and AI and data science. Maybe you could tell us a bit about that.Hannah Davis (00:45):Sure. Yeah. Before I got sick, I was working in machine learning with a particular focus on generative models for art and music. so I did some projects like translating data sets of landscapes into emotional landscapes. I did a project called The Laughing Room, where there was a room and you went in and the room would listen to you and laugh if it thought you said something funny, . and then I did a lot of generative music based on sentiment. So I, I did a big project where I was generating music from the sentiment of novels and a lot of kind of like critical projects, looking at biases in data sets, and also curating data sets to create desired outcomes in these generative models.Eric Topol (01:30):So, I mean, in a way again, you were ahead of your time because that was before ChatGPT in November last year, and you were ahead of the generative AI curve. And here again, you're way ahead in in the citizen science era as it particularly relates to the pandemic. So, I, I wonder if you could just tell us a bit I think it was back, we go back to March, 2020. Is that when you were hit with Covid?Hannah Davis (01:59):Yes.Eric Topol (02:00):And when did you realize that it wasn't just an acute phase illness?Hannah Davis (02:06): for me, honestly, I was not worried at all. I, my first symptom was that I couldn't parse a text message. I just couldn't read it, thought I was tired. an hour later, took my temperature, realized I had a fever, so that's when I kind of knew I was sick. but I really just truly believed the narrative I was going to get better. I was 32 at the time. I had no pre-existing conditions. I just was, you know, laying around doing music stuff, not concerned at all. And I put a calendar note to donate plasma two weeks out, and I was like, you know, I'm going to hit that mark. I'm going to donate plasma, contribute, it'll be fine. And that day came and went. I was still, you know, pretty sick with a mild case. You know, I didn't have to be hospitalized.(02:49):I didn't have severe respiratory symptoms. but my neurological symptoms were substantial and did increase kind of over time. And so I, I was getting concerned. Three weeks went by, still wasn't better. And then I read Fiona Lowenstein's op-ed in the New York Times. They were also very young. They were 26 at the time, they had been hospitalized, and they had this prolonged recovery, which we now know as Long Covid. and they started the Body Politic Support Group joined that saw thousands of people with the same kind of debilitating brain fog, the same complete executive functioning loss, inability to drive, forgetting your family members' names who were all extremely young, who all had mild cases. and that's kind of when I got concerned because I realized, you know, this was not just happening to me. This was happening to so many people, and no one understood what was happening.Eric Topol (03:49):Right. extraordinary. And, and was a precursor, foreshadowing of what was to come. Now, here it is, well over three years later. And you're still affected by all this, right?Hannah Davis (04:02):Yes. Pretty severely.Eric Topol (04:04):Yeah. And I learned about that when I had the chance to work with you on the review. You were the main driver of this review, and I remember asking you, because I, I didn't know anyone in the world that was tracking Long Covid like you and to be the primary author. And then you sent this outline, and I had never seen an outline in all my years in academic medicine. I never saw an outline like this of the review. I said, oh my God, this is incredible. So I know that during that time when we worked on the review together, along with Lisa McCorkell and Julia Moore Vogel, that, you know, there, there were times when you couldn't work on it right there, there were just absolutely, you would have some good days or bad days. And, and that's the kind of, is that kind of the way is, how it goes in any given unit time?Hannah Davis (04:55):I think generally, I, I communicated as like 40% of my function is gone. So, like, I used to be able to have very, very full days, 12 hour days would work, would socialize, would do music, whatever. you know, I, I have solidly four functional hours a day. on a good day, maybe that will be six. On a bad day, that's zero. And when I push myself by accident, I can get into a crash that can be three to seven days easily. Hmm. and then I'm, then I'm just not, you know, able to be present. I don't feel here. I don't feel cognitively able, I can't drive. And then I'm just completely out of the world for a bit of time.Eric Topol (05:35):Yeah. Wow. So back in the early days of when you were first got sick and realized that this was not going to just go away, you worked with others to form this Patient -Led Research Collaborative organization, and here you are, you didn't have a medical background. You certainly had a data science and computing backgrounds. But what were your thoughts? I mean, citizen science has taken on more of a life in recent years, certainly in the last decade. And here there's a group of you that are kind of been leading the charge. we'll get to, you know, working with RECOVER and NIH in just a moment. But what were your thoughts as to whether this could have an impact at working with these, the other co-founders?Hannah Davis (06:27):I think at first we really didn't realize how much of an impact we were going to have. The reason we started collecting data in the first place really was to get answers for ourselves as patients. You know, we saw all these kind of anecdotes happening in the support group. We wanted to get a sense of which were happening the most at what frequency, et cetera. and it really wasn't until after that when like the CDC and WHO started reaching out, asking for that data, which was gray literature at the time that we kind of realized we needed to formalize this and, and put out an official paper which was what ended up being the second paper. But the group that we formed really is magical, I think like, because the primary motivator to join the group was being sick and wanting to understand what was happening. And because everyone in the group only has the kind of shared experience of, of living with Long Covid, we ended up with a very, very diverse group. Many, many different and I think that really contributed to our success in both creating this data, but also communicating and, and doing actionable policy and advocacy work with it.Eric Topol (07:42):Did you know the folks before? Or did you all come together because of digital synapses?Hannah Davis (07:47):Digital synapses? I love that. Absolutely. No, we didn't know each other at all. they're now all, you know, they're my best friends by far. you know, we've been through this, this huge thing together. but no, we didn't meet in person until just last September, actually. And many of them we still haven't even met in person. which makes it even more magical to me.Eric Topol (08:13):Well, that's actually pretty extraordinary. So together you've built a formidable force to stand up for the millions and millions of people. As you wrote in the review, 65 million people around the world who are suffering in one way or another from Long Covid. So just to comment about the review --you know, I've been working in writing papers for too long, 35 years. I've never, in my entire career, over 1300 peer reviewed papers on varied topics, ever had one that's already had 900,000 downloads, is the fourth most cited paper and Altmetric since published the same timeframe in January of all 500,000 peer-reviewed papers. Did you ever think that the, the work that, that you did and our, you know, along with Lisa and doing, and I would ever have this type of level of interest?Hannah Davis (09:16):No, and honestly, it's so encouraging. Our, our second paper to me did very well. and, you know, was, was widely viewed and widely cited, and this one just surpassed that by miles. And I think that it's encouraging because it communicates that, that people are interested, right? People, even if they don't understand what long covid is, there is a huge desire to know. And I think that putting this out in this form, focusing on the biomedical side of things really gives people a, a tool to start to understand it. And from the patient side of things, more than any other paper I've heard we, we get so many comments that are like, oh, I brought this to my doctor and, you know, the course of my care change. Like he believed me and he started X treatment. and that, that's the kind of stuff that just makes us so, so meaningful. and I'm so, so grateful that, that we were able to do this.Eric Topol (10:16):Yeah. And as you aptly put it, you know, a work of love, and it was not easy because the reviewers were not not all of them were supportive about the real impact, the profound impact of long covid. So when you now every day you're keeping track of what's going on in this field, and there's something every single day. one of the things, of course is that we haven't really seen a validated treatment all this time, and you've put together a list of candidates, of course, it was in the review, and it constantly gets revised. What are some of the things that you think are alluring from preliminary data or mechanisms that might be the greatest unmet need right now of, of getting some relief, some remedy for this? What, what, what's your sense about that?Hannah Davis (11:13):I think the one I'm most excited about right now are JAK/STAT inhibitors. And this is because one of the leading researchers in viral onset illness Ron Davis and that group believe that basically they're, they have a shunt hypothesis, and that means they, they basically think there's a switch that happens in the body after you've, you've had a viral illness like this, and that that switch can actually be unswitched. And that, to me, as a patient, that's very exciting because, you know, that that's what I imagine a cure kind of looks like. and they did some computational modeling and, and identified JAK/STAT inhibitors as one of the promising candidates. so that's from like the, like hypothetical side that needs to be tested. And then from the patient community, from some things we're seeing I think really easily accessed ones include chromolyn sodium.(12:14):So these are prescription antihistamines. they're both systemic. So Coen has been seeming to work for patients with brain fog and sleep disorders. And chromolyn sodium particularly works in, in patients with gastrointestinal mast cell issues. People are going on to kind of address the micro clots. I, for me personally, has been one of the biggest changers game changers for my brain fog and kind of cognitive impairment type things. but there's so many others. I mean, I think we, we really wanna see trials of anticoagulants. I'm personally really excited to start on ivabradine which is next up in my queue. And, and seems to have been a, a game changer for a lot of patients too. I V I G has worked for patients who are, have been able to get it, I think for both I V I G and ivabradine. Those are medications that are challenging to get covered by insurance. And so we're seeing a lot of those difficulties in, in access with a couple of these meds. But yeah, just part of, part of the battle, I guess,Eric Topol (13:32):You know, one of the leading of many mechanisms that in this mosaic of long covid is the persistence of virus or virus components. And there have been at least some attempts to get some Paxlovid trials going. Do you see any hope for just dealing, trying to inactivate the virus as a way forward?Hannah Davis (13:54):Absolutely. Definitely believe in the viral persistence theory. I think not only Paxlovid, but other a covid antivirals. I know that Steve deas and Michael Paluso at U C S F are starting a couple long covid trials with other covid antivirals that yeah, for sure. I think they all obviously need to be trialed A S A P. And then I also think on the viral persistence lens, ev like almost everyone I know has viral reactivation of some sort like EBV, CMV, VZV, you know, we obviously see a lot of chickenpox or shingles reactivations and antivirals targeting those as well I think are really important.Eric Topol (14:41):Yeah. Well, and I also, just the way you're coming out with a lot of this, you know terminology and, you know science stuff like I V I G for intravenous immunoglobulin and for those who are not, you know, just remember, this is a non-life science expert who now has become one. And that goes back again to the review, which was this hybrid of people who had long covid with me who didn't to try to come up with the right kind of balance as to, you know, what synthesizing what, what we know. And I think this is something the medical profession has never truly understood, is getting people who are actually affected and, and becoming, you know, the real experts. I mean, I, I look to you as one of the world's leading authorities, and I learn from you all the time.(15:35):So that goes to RECOVER. So there was a long delay in the US to recognize the importance of long covid. Even the UK was talking to patients well before they ever had a meeting here in the us, but eventually, somehow or other they allocated a billion dollars towards long covid research at the NIH. And originally, you know, fortunately Francis Collins, when he was director, saw the importance, and he, I learned bequeathed that 2 of the NIH institutes, one of the directors, Gary Gibbons visited me recently because of a negative comment I made about RECOVER. But before I go over my comment, you've been as he said, you, and Lisa McCorkell ,among others from the Patient-led Collaborative have had a seat at the table. That's a quote from Gary. Can you tell us your impression about RECOVER you know, in terms of at least they are including Patient-Led research folks with long covid as to are they taking your input seriously? And what about the billion dollars ?Hannah Davis (16:46):Oh, boy. tricky question. I don't even know where to start. Well, I mean, so I think recover really messed up by not putting experts in the field in charge, right? Like we are, we have from the beginning have needed to do medical provider education at the same time that all these studies started getting underway. And that was just a massive amount of work to try to include the right test to convince medical professionals why they weren't necessary. all that could have been avoided by putting the right people in charge. And unfortunately, that didn't happen. unfortunately recovers our, our best hope still or at least the, the best funded hope. so I really want to see it succeed. I think that they, they have a long way to go in terms of, of really understanding why patient representation matters and, and patient engagement matters.(17:51):I, you know, it's been a couple years. It's, it's still very hard to do engagement with them. it's kind of a gamble when you get placed on a, a committee if they are going to respect you or not. And, and that's kind of hard as people Yeah. Who are experts now, you know, I've been in the field of Long Covid research more than anyone really I'm working with there. I, I really hope that they improve the research process, improve the publication process. the, a lot of the engagement right now is, is just tokenization. you know, they, they have patient reps that are kind of like just a couple of the patient reps are kind of yes men you know, they, they get put on higher kind of positions and things like that. but they're, I think there's 57 patient reps in total spread across committees. we don't have a good organizing structure. We don't know who each other are. We don't really talk to each other. there, there's room for a lot of improvement, I would say, well,Eric Topol (18:59):The way I would put it is, you know, you kind of remember it like when you have gatherings where there's an adult table, and then there's the kiddie's table. Absolutely. Folks are at the kiddy table. I mean, yeah. And it's really unfortunate. So they had their first kind of major publication last week, and it's led to all sorts of confusion. you wrote about it, what did we, what did we glean from that, from that paper that was reported as a 10% of people with covid go on to Long Covid, and there were clearly a risk with reinfections. Can you kind of review that and also what have we seen with respect to the different strains as we go on from, from the Wuhan ancestral all the way through to the various lineages of omicron. Has that led to differences in what we've seen with Long Covid?Hannah Davis (19:56):Yeah, that's a great question and one that I think a lot of people ask just because it, you know, speaks to the impact of long covid on our future. I think not just this paper, but many other papers at this point, also, the, the ONS data have shown that that Long Covid after omicron is, is very common. I think the last ONS data that came out showed of everyone living with Long Covid in the UK. After Omicron, which was the highest group of all of them. we certainly saw that in the support groups also, just, just so many people. but people are still getting it. I think it's because it, most cases of Long Covid happen after a mild infection, 75 to 90%. And when you get covid, now, it is a mild infection, but whatever the pathophysiology is, it doesn't require severe infection.(20:50):And you know, where I think we hopefully have seen decreases in like the, the pulmonary and the cardiovascular like organ damage types we're not seeing real improvements at all in kind of the long term and the neurological and the ones that end up lasting, you know, for years. And that's really disappointing. in terms of the paper, you know, I think there were two parts of the paper. There were those, those items you mentioned, which I think are really meaningful, right? The, the fact that re infections have a higher rate of long covid is like ha needs to have a substantial impact on how we treat Covid going forward. that one in 10 people get it after Omicron is something we've been, you know, shouting for, for over a year now. and I think this is the first time that will be taken seriously.(21:42): but at the same time, the way RECOVER communicated about this paper and the way that you talked to the press about this paper shows how little they understand the post-viral history right, of, of like thinking about a definition. Why wouldn't they know that would upset patients? You know, that and the fact that they, in my opinion you know, let patients take the brunt of that anger and upset you know, where they should have been at the forefront, they should have been engaging with the patient community on Twitter is really upsetting as well. Yeah.Eric Topol (22:20):Yeah. And you know, I, when I did sit down with Gary Gibbons recently, and he was in a way wanting to listen about how could recover fulfill its goals. And I said, well, firstly, you got to communicate and you got to take the people very seriously not just as I say, put 'em at the Kiddie table, but, you know, and then really importantly is why isn't there a clinical trial testing any treatment? Still today, not even a single trial has been mounted. There's been some that have been, you know, kind of in the design phase, but still not for the billion dollars. All that's been done is, is basically following people with symptoms as already had been done for years previously. So it's, it's just so vexing to see this waste and basically confusion that's been the main product of RECOVER to date and exemplified by this paper, which is apparently going to go through some correction phases and stuff. I mean, I don't know, but whether that's going to the two institutes that it's, it's N H L B I, the National heart, lung and Blood, and the Neurologic Institute, NINDS, that are the two now in charge of making sure that RECOVER recovers from where it's, it's at right now. And yeah, so lack of treatments, and then the first intervention study that was launched incredibly was exercise. Can you comment about that?Hannah Davis (23:56):It's unreal. You know, it's, it, it just speaks to the lack of understanding the existing research that's in this space. Exercise is not a treatment for people with hem. It has made people bedbound for life. The risks is are not, the risks are substantial. that there was no discussion about it, that there was no understanding about it. That, you know, even patients who don't have pem who wouldn't necessarily be harmed by this trial deserve better, right? They still deserve a trial on anticoagulants or literally anything else than exercise. And there's, it just, it, it's extremely frustrating to see it, it would have been so much better if it was led by people who already had the space, who didn't have to be educated in post exertional malaise and the, the underlying underpinnings of it. and just had a sense of, of how to continue forward and, you know, patients deserve better.(24:55):And I think we're, we're really struggling because yeah, there's, there's going to be five trials as I understand it, and that's not enough. And none of them should be behavioral or lifestyle interventions at all. you know, I think it also communicates just the, the not understanding how severe this is. And I get that it's hard. I get that when you see patients on the screen, you think that they're fine and that's just how they must look all the time. But recover doesn't understand that for every hour they're asking patients to engage in something that's an hour, they're in bed, you know, that, that they're, they take so much time away from patients without really understanding like the, the minimum they should be able to do is, is understand the scope and the severity of the condition, and that we need to be trialing substantially more serious me treatments than, than exercise. right,Eric Topol (25:54):Right, right. And also the recognition, of course, as you know very well about the subtypes of long covid. So, you know, for example, the postural orthostatic tachycardia syndrome pots and how, you know, there's a device, so you don't have to always think about drugs where you put it in the back of your ear and it's neuromodulator to turn down your vagus nerve and not have the dizziness and rapid heart rate when you stand and all the other symptoms. And, you know, it costs like a dollar to make this thing. And why don't you do a trial with that? I mean, that was one of the things, it doesn't have to always be drugs, and it doesn't have to, it certainly shouldn't be exercise. But you know, maybe at some point this will get on on track. Although I'm worried that so much of the billion dollars has already been spent and no less the loss of time here, I people are suffering. Now, that gets me to this lack of respect lack of every single day we are confronted with people who don't even believe there's such a thing as long covid after all this time, after all these people who've had their lives profoundly disrupted.(27:04):What, what can you say about this?Hannah Davis (27:07):It's just a staggering, staggering lack of empathy. And I think it's also fear and a defense mechanism, right? People want to believe that they have more control over their lives than they do, and they want to believe that, that it's not possible for them personally to get a virus and then never recover and have their life changed so substantially. I really genuinely believe the people who don't believe long covid is real at this point you know, have their own things going on. And just, yeah,Eric Topol (27:38):It's kinda like how Covid was a hoax, and now this is, I mean, the, you, you just, ofHannah Davis (27:44):Course, but it's true, like it's happened with, it happened with me, CF s it happened with HIV AIDS. Mm-hmm. someone just showed me a brochure of, of a 10 week lifestyle exercise intervention for aids, you know, saying that you could positively think your way out of it. All that is, is, is defense mechanism, just, yeah. You know, it's repeating the same history over and over.Eric Topol (28:07):Well, I think you nailed it. And of course, you know, it was perhaps easier with Myalgic encephalomyelitis when it weren't as many people affected as the tens of millions here, but to be in denial. the other thing is the young people perfectly healthy that are those who are the most commonly affected. a lot of the people who I know who have been hit are like you, you know, very young and, and you know like Julia in my group who, you know, was a big runner and, you know, can't even go blocks at times without being breathless. And this is the typical, I mean, I saw in clinic just yesterday, an older fellow who had been in the hospital for a few weeks and has terrible long covid. And yes, the severity of covid can correlate with the sequela, but because of just numbers, most people are more your phenotype. Right, Hannah.Hannah Davis (29:08):Right, exactly. It's a weird like math thing for people to wrap their head around. Like, yes, if you're hospitalized, the chance of getting long covid is much, much higher than if you were not hospitalized. But because the vast number of cases were not hospitalized, the vast number of long cases, long covid cases were not hospitalized. but I think like all of these things are interesting clues into the pathophysiology. You know, we also see people who were hospitalized who recover faster than some of these, the neurocognitive mild, my mild encephalomyelitis subtypes for sure. I think all of that is, is really interesting and can point to clues about kind of what is, what is happening at the core.Eric Topol (29:54):Yeah. And that I wanted to get into before I wrap up some of the things that are new or added since our review in published in January. so I just recently reviewed the brain in long covid with these two German studies, one of which showed the spike protein was lighting up in the reservoir, the kind of initial reservoir, the brain, the skull, and the meninges. the, the, basically the layers covering the brain, the, particularly the skull bone marrow. And that's where all these immune cells are in high density that are patrolling the brain. And so it really implicated spike protein per se, in people who've had covid. and then the other German study, which was so striking in mild covid, the majority of people where they had it 10 months later, all this signature by m r i, quantitative, m r i of major inflammation with free water and this so-called mean diffusivity, which is basically the leaking and you know, the inflammation of the brain.(31:01):And so, and that's as long as they follow the people, you know, if they followed 'em three years, they'd probably still see this. And so there's a lot of brain inflammation that is linked to the symptoms as you've described. You know, the brain fog, the memory executive function. But we have no remedy. We have no way, how can we stop the process? How can we turn it around like, as you mentioned, like a jak stat inhibitor in other ways that we desperately need to get into testing. so that was one thing I, I wonder, I mean, I think people who have had the symptoms of cognitive effects know there's something going wrong in their brain, but here is, you know, kind of living proof that what there's sensing is now you can see it. thoughts about that?Hannah Davis (31:52):I mean, I think the research is just staggering. It's so, so validating as someone, you know, who was living this and living the severity of it, you know, without research for years, it's, it's wonderful to finally see so many things come out. but it's overwhelming research. And I, I don't understand kind of the lack of urgency. Those are two huge, huge studies with huge implications. you know, that the, that the spike would still be in the skull like that in the, in the bone marrow like that. and the neuroinflammation I think, you know, feels very obvious in terms of what, like the symptoms end up presenting. why aren't we trialing things like the, the, this is just destroying people's lives. Even if you don't care about people's lives, like it will destroy the economy. Like people are still getting this, this is not decreasing. these are really, really substantial tangible injuries that are happening.Eric Topol (32:52):Yeah, I know. And, and there's not enough respect for preventing this. The only way we know to prevented it for sure is just not to get covid, of course. Right. And then, you know, things like vaccines help to some extent. The magnitude, we don't know for sure, you know, maybe metformin helps but, you know, prevention and everyone's guard, not everyone, but you know, vast majority, you know, really let down at this point when there's not as much circulating virus as there has been. Now, another area where it has really been lit up since our review was autoimmune diseases. So we know there's this common link in some people with long covid. There's lots of auto antibodies and self-destruction that's ongoing. The immune system has gone haywire. But now we've learned, you know, this much higher incidence of rheumatoid arthritis and lupus and across, you know, every one of the autoimmune diseases.(33:44):So the impact besides the brain autoimmune diseases and then the one that just blows me away at the beginning of the pandemic, even in the first year there were starting to see more people showing up with type two diabetes and say, ah, well it must be a coincidence. And now there are 12 large studies, every single one goes through of a significant increase in type two diabetes and, and possibly even autoimmune diabetes, which makes sense. So this is the thing I wanted to clarify cuz a lot of people get mixed up about this, Hannah, there's the symptoms of long covid, some of which we reviewed, many of the long lists we haven't. But then there's also the sequela to organ hits like the diabetes and immune system and the brain and you know, also obviously kidney and heart and on and on. Can you help differentiate? Cause a lot of people get mixed up by all this stuff.Hannah Davis (34:46):Yeah, I mean I think, you know, we started out with symptoms because that's what we knew, that's what we were talking about. but I do think it's helpful to start, and I, I do think it would be helpful to do a big review on conditions and that does include ME/CFS and Diso but also includes diabetes, includes heart attacks and strokes are includes dementia risks. and yeah, I think the, the difficulty with kind of figuring out what, what percent of long covid are each of these conditions is really biased by the fact that for that, doctors can't recognize me CFS and dysautonomia that it doesn't end up in the EHR data. And so we can't really do these large scale like figuring out the percentage of what is what. but I think like, I, I saw someone describe long covid recently as like a, a large scale neurocognitive impairment emergency, a a large scale cardiovascular event emergency. I think those are extremely accurate. the immune system dysfunction is really severe. I really would like to see the conversation start moving more toward the, the conditions and the pathophysiologies based on what we're finding yeah, more than, more than just the symptoms.Eric Topol (36:15):Right. And then, you know, there's this other aspect of the known unknown, so with two other viruses. So for example, back in 1918 with influenza, it, it took 15 years to see or more that this would lead to a significant increased risk of Parkinson's disease. And then with polio, the post-polio syndrome showed up up to 30 years later with profound progressive muscular atrophy and, you know, falls and all sorts of major neurologic hits that were due for from the original polio virus. And so, yeah, some of the things that we're learning here with long covid hopefully will spill over to all these other post-infectious processes. But I think what's emphasizing in our discussion is how much more we, we really do need to learn how we desperately need some treatments, how we desperately need to have the respect for this syndrome that it deserves which still isn't there, it's just, it's unfathomable to me that we still have people dissing it on a daily basis and, and not, you know, a small minority, but actually a pretty strident group that's, that's not so small.(37:35):Now, before you wrap up, what have I missed here? Hannah with you, because this is a rarefied opportunity to have a sit down with you about what's going on in long covid and also to emphasize citizen science here because this is, if there's anything I've ever seen in my career to show the importance of citizen science, it's been the long covid story. you as one of the leaders of it. So have I missed something?Hannah Davis (38:05):I feel like we actually covered a pretty good bit. I would say maybe just for people listening, emphasizing that long covid is still happening. I think, you know, so many people that we see recently got long covid after getting vaccinated or having a prior infection and just kind of relaxing all their precautions and they're, they're angry. You know, the, the newer group of long Covid folks are angry because they were lied to that they were safe, and that's completely reasonable. you know, that it's still happening in, in one in 10 vaccinated omicron infections is a huge deal. and, and I think yeah, just re-emphasizing that, but overall that, yeah, you know, this is very serious. I think there's my, my MO for Twitter, really, honestly, despite all the, the accusations of fear mon mongering, I really don't put extreme stuff online, but I really do believe that this is this is currently leading to, you know, higher rates of, of heart attacks.(39:08):I do believe that we will see a, a wave of early onset dementia that is honestly is happening already you know, happening in my friend group already. and like you said there, there's a lot of unknowns that can be speculated about the fact that we see E P V reactivation in so many people. Are we gonna see a lot of onset multiple sclerosis mm-hmm. you know, lymphomas other E B V sequelae, like the danger's not over the danger's actually, like pretty solidly. there's pretty solidly evidence for some, some pretty serious things to come and you know, I keep saying we gotta get on top of it now, butEric Topol (39:55):Well, I, I always the, unfortunately, some, some people don't realize it, but the eternal optimist that we will get there, it's taking too long, but we got to ratchet up the heat, get projects like RECOVER and elsewhere in the world to go in high gear and, you know, really get to testing the promising candidates. You so have aptly outlined here and in your writings. you know, I think this has been an incredible relationship that I've been able to develop with you and your colleagues and I've learned so much from you and I will continue to be following you. I hope everyone listening that if they don't already follow you and, and others that are trying to keep us up to speed, which you know, just this week again, there was a Swiss study, two year follow up showing that the number of people that were still affected significantly with long covid symptoms at two years was 18%.(40:58):That's a lot of folks, and they were unvaccinated, but still, I mean, they, in order to have two year follow up, you're going to see a lot of people who before the advent of vaccines. So this, if you look at the data, the research carefully and it gets better quality as time goes on, because we have control groups, we have matched controls, we have, you know, hopefully the beginning of randomized trials of treatment. we'll hopefully get some light. And part of the reason we're going to get there is because of you and others, getting us fully aware, keeping track of things, getting the research committee to be accountable and not just pass off the same old stuff, which is not really understanding the condition. I mean, how can you start to really improve it if you don't even understand it? And who are you going turn to to understand it? you don't, you don't just look at, you know, MRI brain studies or immune lab studies. You got to talk to the folks who, who know it and know it so well.. All right, well this has been hopefully one of many more conversations we'll have in the future and at some point to celebrate some progress, which is what we so desperately need. Thank you so much, Hannah.Hannah Davis (42:19):Thank you so much. Absolute pleasure.LinksOur Long Covid review with Lisa McCorkell and Julia Moore-Vogelhttps://www.nature.com/articles/s41579-022-00846-2The Brain and Long Covidhttps://erictopol.substack.com/p/the-brain-and-long-covidHeightened Risk of Autoimmune Diseaseshttps://erictopol.substack.com/p/the-heightened-risk-of-autoimmuneCovid and the Risk of Type 2 Diabeteshttps://erictopol.substack.com/p/new-diabetes-post-acute-covid-pascThanks for listening and reading Ground Truths.Please share if you found this informative.Your free subscription denotes your support of this work. Should you decide to become a paid subscriber you should know that all proceeds go to support Scripps Research. That has already helped to bring on several of our summer high school and college interns. Get full access to Ground Truths at erictopol.substack.com/subscribe
Link to bioRxiv paper: http://biorxiv.org/cgi/content/short/2023.03.29.534836v1?rss=1 Authors: Carrette, L. L. G., Kimbrough, A., Davoudian, P. A., Kwan, A. C., Collazo, A., George, O. Abstract: Chronic nicotine results in dependence with withdrawal symptoms upon discontinuation of use, through desensitization of nicotinic acetylcholine receptors and altered cholinergic neurotransmission. Nicotine withdrawal is associated with increased whole-brain functional connectivity and decreased network modularity, however, the role of cholinergic neurons in those changes is unknown. To identify the contribution of nicotinic receptors and cholinergic regions to changes in the functional network, we analyzed the contribution of the main cholinergic regions to brain-wide activation of the immediate early-gene FOS during withdrawal in male mice and correlated these changes with the expression of nicotinic receptor mRNA throughout the brain. We show that the main functional connectivity modules included the main long-range cholinergic regions, which were highly synchronized with the rest of the brain. However, despite this hyperconnectivity they were organized into two anticorrelated networks that were separated into basal forebrain projecting and brainstem-thalamic projecting cholinergic regions, validating a long-standing hypothesis of the organization of the brain cholinergic systems. Moreover, baseline (without nicotine) expression of Chrna2, Chrna3, Chrna10, and Chrnd mRNA of each brain region correlated with withdrawal-induced changes in FOS expression. Finally, by mining the Allen Brain mRNA expression database, we were able to identify 1755 gene candidates and three pathways (Sox2-Oct4-Nanog, JAK-STAT, and MeCP2-GABA) that may contribute to nicotine withdrawal-induced FOS expression. These results identify the dual contribution of the basal forebrain and brainstem-thalamic cholinergic systems to whole-brain functional connectivity during withdrawal; and identify nicotinic receptors and novel cellular pathways that may be critical for the transition to nicotine dependence. Copy rights belong to original authors. Visit the link for more info Podcast created by Paper Player, LLC
Host: Charles Turck, PharmD, BCPS, BCCCP Guest: Srdan (Serge) Verstovsek, MD, PhD What's the role of the JAK-STAT pathway in myelofibrosis, and what are the key genetic mutations and biomarkers we need to be aware of? Explore the pathophysiology of myelofibrosis with Dr. Charles Turck and Dr. Serge Verstovsek, Professor in the Department of Leukemia at the University of Texas MD Anderson Cancer Center.
Link to bioRxiv paper: http://biorxiv.org/cgi/content/short/2022.12.21.521419v1?rss=1 Authors: Mitchell, J. M., Mabin, J. W., Muehlbauer, L. K., Annis, D. S., Mathur, S. K., Johansson, M. W., Hebert, A. S., Fogerty, F. J., Coon, J. J., Mosher, D. F. Abstract: IL5 and IL33 are major activating cytokines that cause circulating eosinophils to polarize, adhere, and release their granule contents. We correlated microscopic features of purified human blood eosinophils stimulated for 10 min with IL5 or IL33 with phosphoproteomic changes determined by multiplexed isobaric labeling. IL5 caused phosphorylation of sites implicated in JAK/STAT signaling and localization of pYSTAT3 to nuclear speckles whereas IL33 caused phosphorylation of sites implicated in NF{kappa}B signaling and localization of RELA to nuclear speckles. Phosphosites commonly impacted by IL5 and IL33 were involved in networks associated with cytoskeletal organization and eosinophil adhesion and migration. Many differentially regulated phosphosites were in a diverse set of large proteins-RAB44, a "large RAB" associated with crystalloid granules; NHSL2 and VIM that change localization along with the nucleus during polarization; TNFAIP3 vital for control of NF{kappa}B signaling, and SRRM2 and PML that localize, respectively, to nuclear speckles and PML bodies. Gene expression analysis demonstrated differential effects of IL5 and IL33 on IL18, CCL5, CSF1, and TNFSF14. Thus, common effects of IL5 and IL33 on the eosinophil phosphoproteome are important for positioning in tissues, degranulation, and initiation of new protein synthesis whereas specific effects on protein synthesis contribute to phenotypic heterogeneity. Copy rights belong to original authors. Visit the link for more info Podcast created by Paper Player, LLC
Have questions about JAK inhibitors? Not sure how they work, what they treat, risks and how effective they are compared to other treatments? Listen as rheumatologist and NPF Medical Board member, Dr. Sergio Schwartzman from Weill Cornell Medical Center in NY, addresses such questions and more about the JAK STAT pathway. This Psound Bytes episode is provided with support from AbbVie, Amgen, Bristol Myers Squibb and Janssen.
Myelofibrosis is a rare myeloproliferative neoplasm characterized by the buildup of scar tissue in the bone marrow, leading to decreased erythropoiesis, progressive bone marrow failure, and anemia. Currently, the discovery of the Janus kinase-signal transducer and activator of transcription (JAK-STAT) pathway's role in the pathogenesis of myelofibrosis is transforming the landscape with novel agents that improve patients' outcomes. However, correctly diagnosing and managing this disease using novel therapies and strategies remains challenging for clinicians.
Do you know JAK? If not, then you're about to. This week, we're joined by Dr. Jason Hawkes as he breaks down the specifics of JAK inhibitors, their safety profiles, the JAK-STAT pathway, and more. Each Thursday, join Dr. Raja and Dr. Hadar, board certified dermatologists, as they share the latest evidence based research in integrative dermatology. For access to CE/CME courses, become a member at LearnSkin.com. Jason Hawkes, MD MS is a board-certified dermatologist and Associate Professor of Dermatology at the University of California Davis in Sacramento. He received his medical degree and completed his dermatology residency training from the University of Utah School of Medicine, where he was also enrolled in the Program's 2+2 dermatology research track. In addition to being a board-certified dermatologist, Dr. Hawkes completed a research fellowship in translation immunology at the National Institutes of Health (NIH) and received a master's degree in Clinical Investigation from Rockefeller University in NYC. Dr. Hawkes is currently serving on the Medical Board of the National Psoriasis Foundation (NPF) and as a Councilor of the International Psoriasis Council (IPC). He is the recipient of multiple teaching awards and research grants and has served as the Principal Investigator and Co-Investigator of multiple pharmaceutical-sponsored and investigator-initiated clinical trial protocols. He is the author of more than 50 peer-reviewed publications and 8 book chapters. Dr. Hawkes' principal clinical and research interests are the treatment of complex inflammatory skin diseases, such as psoriasis, hidradenitis suppurativa, and eczema, using novel, targeted systemic or biologic therapies. To learn more about JAK inhibitors and psoriasis, attend Dr. Hawkes' lecture at the 2022 Integrative Dermatology Symposium.
PeerView Family Medicine & General Practice CME/CNE/CPE Video Podcast
Go online to PeerView.com/CCT860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, experts in dermatology discuss the role of the JAK/STAT pathway in psoriasis, as well as treatment with novel kinase inhibitors for the management of patients with psoriasis. Upon completion of this activity, participants should be better able to: Describe and differentiate targeting of the TYK2, JAK1, JAK2, and JAK3 kinases and the correlation to emerging therapies for the treatment of moderate to severe psoriasis, Summarize recent efficacy and safety data for current and emerging therapies for the treatment of moderate to severe psoriasis, Recommend treatment for patients with moderate to severe psoriasis according to the latest guidelines and clinical evidence, particularly as emerging therapies become available.
Go online to PeerView.com/CCT860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, experts in dermatology discuss the role of the JAK/STAT pathway in psoriasis, as well as treatment with novel kinase inhibitors for the management of patients with psoriasis. Upon completion of this activity, participants should be better able to: Describe and differentiate targeting of the TYK2, JAK1, JAK2, and JAK3 kinases and the correlation to emerging therapies for the treatment of moderate to severe psoriasis, Summarize recent efficacy and safety data for current and emerging therapies for the treatment of moderate to severe psoriasis, Recommend treatment for patients with moderate to severe psoriasis according to the latest guidelines and clinical evidence, particularly as emerging therapies become available.
Go online to PeerView.com/CCT860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, experts in dermatology discuss the role of the JAK/STAT pathway in psoriasis, as well as treatment with novel kinase inhibitors for the management of patients with psoriasis. Upon completion of this activity, participants should be better able to: Describe and differentiate targeting of the TYK2, JAK1, JAK2, and JAK3 kinases and the correlation to emerging therapies for the treatment of moderate to severe psoriasis, Summarize recent efficacy and safety data for current and emerging therapies for the treatment of moderate to severe psoriasis, Recommend treatment for patients with moderate to severe psoriasis according to the latest guidelines and clinical evidence, particularly as emerging therapies become available.
Go online to PeerView.com/CCT860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, experts in dermatology discuss the role of the JAK/STAT pathway in psoriasis, as well as treatment with novel kinase inhibitors for the management of patients with psoriasis. Upon completion of this activity, participants should be better able to: Describe and differentiate targeting of the TYK2, JAK1, JAK2, and JAK3 kinases and the correlation to emerging therapies for the treatment of moderate to severe psoriasis, Summarize recent efficacy and safety data for current and emerging therapies for the treatment of moderate to severe psoriasis, Recommend treatment for patients with moderate to severe psoriasis according to the latest guidelines and clinical evidence, particularly as emerging therapies become available.
PeerView Family Medicine & General Practice CME/CNE/CPE Audio Podcast
Go online to PeerView.com/CCT860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, experts in dermatology discuss the role of the JAK/STAT pathway in psoriasis, as well as treatment with novel kinase inhibitors for the management of patients with psoriasis. Upon completion of this activity, participants should be better able to: Describe and differentiate targeting of the TYK2, JAK1, JAK2, and JAK3 kinases and the correlation to emerging therapies for the treatment of moderate to severe psoriasis, Summarize recent efficacy and safety data for current and emerging therapies for the treatment of moderate to severe psoriasis, Recommend treatment for patients with moderate to severe psoriasis according to the latest guidelines and clinical evidence, particularly as emerging therapies become available.
Go online to PeerView.com/CCT860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, experts in dermatology discuss the role of the JAK/STAT pathway in psoriasis, as well as treatment with novel kinase inhibitors for the management of patients with psoriasis. Upon completion of this activity, participants should be better able to: Describe and differentiate targeting of the TYK2, JAK1, JAK2, and JAK3 kinases and the correlation to emerging therapies for the treatment of moderate to severe psoriasis, Summarize recent efficacy and safety data for current and emerging therapies for the treatment of moderate to severe psoriasis, Recommend treatment for patients with moderate to severe psoriasis according to the latest guidelines and clinical evidence, particularly as emerging therapies become available.
Are you trying to weigh the pros and cons of possibly using a biologic like Dupixent for your skin condition? Your immune system has such a complex relationship with one another, so it's important to have complete informed consent when starting one. Look into all the side effects- they could be actually helpful, but they could also lead to cancer! My guest today, Heather Zwickey, earned a Ph.D. in Immunology and Microbiology from the University of Colorado and completed a postdoctoral fellowship and taught at Yale University School of Medicine. Dr. Zwickey is recognized internationally as an expert and educator in the fields of integrative medicine, natural therapies and the immune system and has been leading natural medicine research for 20 years. Heather speaks at conferences world-wide, sharing her enthusiasm for naturopathic medicine and science. She currently serves as the Director of Communication and Innovation at Thaena Inc., a microbiome-based company. Join us as we talk about how biologic drugs for chronic skin conditions work. Did you know about the relationship between your immune system and your skin? Let me know in the comments! In this episode: Biologic drugs - what are they, how are they prescribed, and what do they do? Real side effects of biologics - the bad and even the good Breaking down what cytokines are (in layman's terms) Cytokines and the JAK/STAT pathway Discussion of JAK inhibitors (the newest version of biologic drugs for skin issues) Quotes “Back when we used things like methotrexate for skin disorders, we would see that the entire immune system was blocked and as a result, there would be side effects of things like cancer. When we're only blocking one protein, we have much less severe side effects.” [2:59] “If your skin is not in balance with its microbes, it will affect your gut. We really got to address that. That is the root cause, and usually the way that we're going to address that is with eating more plant-based foods and getting some of the toxins out of our system, and letting those microbes grow the way that they were supposed to grow in normal ecosystems.” [17:47] Links Find Dr. Zwickey online here Healthy Skin Show ep. 180: How Hormones Impact Your Immune System + Skin Health w/ Heather Zwickey, PhD Healthy Skin Show ep.157: How Your Immune System Can Trigger Skin Rashes w/ Heather Zwickey, PhD Follow Dr. Zwickey on Instagram
The JAK-STAT pathway plays a pivotal role in the pathogenesis of myeloproliferative neoplasms (MPNs) including polycythemia vera, essential thrombocythemia, and... The post ASH 2021: novel developments in MPNs appeared first on VJHemOnc.
The JAK-STAT pathway plays a pivotal role in the pathogenesis of myeloproliferative neoplasms (MPNs) including polycythemia vera, essential thrombocythemia, and... The post ASH 2021: novel developments in MPNs appeared first on VJHemOnc.
Welcome to PICU Doc On Call, A Podcast Dedicated to Current and Aspiring Intensivists. I'm Pradip Kamat and I'm Rahul Damania. We are coming to you from Children's Healthcare of Atlanta - Emory University School of Medicine. Welcome to our Episode a 2-year-old with severe pallor and O2 desaturation. Here's the case presented by Rahul: A two-year-old presents to the PICU with severe pallor + O2 requirement. The patient went for a routine check with her primary care who noted the patient appeared severely pale. He sent the patient to the ED. An initial Hgb check revealed a Hgb of 1.5gm/dL. Per mother, she is otherwise healthy but a very picky eater. She also reports the patient drinks milk as a soothing adjunct at night, consuming between 12 - 36oz a day. No family h/o of anemia or any other blood disorders. No h/o recent illness. Mother had a normal spontaneous full-term delivery. The patient is up to date on her immunizations. Per mother, developmental milestones are normal. The mother also denies any history of decreased activity in the child. Given the low Hgb, the patient was admitted to the PICU. Let's transition into some history and physical exam components of this case? What are key history features in this child? Severe pallor in a 2-year-old H/o being a picky eater H/o excessive milk consumption Pertinent negatives include: No obvious blood loss, No petechia, bruising, or jaundice What did the physical exam show? The patient was hypertensive, tachycardic to the 140s, and 10th% weight for growth percentiles On physical exam, the patient was in no acute distress. Her lips, gums, and conjunctiva were pale. She had a systolic ejection murmur. As a pertinent negative, she had no hepatosplenomegaly. She also has no rash, bruising, or petechiae. The lack of hepatosplenomegaly may indicate that the patient has no signs of extramedullary hematopoiesis. Patients with hemolytic processes resulting in anemia may present with signs of scleral icterus, jaundice, and hepatosplenomegaly resulting from increased red cell destruction. In fact, in an emergency department setting, the clinical detection of jaundice was found to have sensitivity and specificity of only approximately 70 percent. To continue with our case, then what were the patient's labs consistent with: Initial CBC showed: WBC 8.5K, RBC 1.14 (L), Hgb 1.5gm/dL; Hct 6.1, MCV 53.5, and an elevated RDW 37.7. Initial platelet count was 50K, reticulocyte count 1.1% Peripheral smear revealed no blasts, thrombocytopenia - with occasional medium-sized platelets - ghost cells and anisocytosis/poikilocytosis- which appears most consistent with iron deficiency. It was interesting that the patient had thrombocytopenia Absolutely, typically with Iron deficiency, there is thrombocytosis (erythropoietin is increased which closely mimics thrombopoietin stimulates platelets). In fact, both act via the non-TK, JAK-STAT pathway. OK, to summarize, we have: Two year old with severe anemia most likely secondary to iron deficiency. As you think about our case, what would be your differential? For any patient with acute severe anemia presenting to the PICU- One has to think in terms of blood loss, decreased or impaired production (i.e bone marrow failure), or peripheral blood destruction (i.e hemolysis). Here would be the organizations: Blood loss Decreased or impaired production Increased destruction Let's go into detail for each: Blood loss can be internal or external (due to trauma, excessive blood draws, due to surgery)-typically gives rise to normochromic normocytic anemia. Decreased or impaired production: Deficiency of substances needed for Hgb & RBC production such as iron Vit B12 etc. Depression of BM due to infection (parvo B), chemicals, pharmacologic agents or immune mechanisms. Bone marrow aplasia can be idiopathic with or without congenital anomalies. Infiltration of BM due to malignancies such as leukemia, Hodgkin disease,...
In this week's episode, we'll review a research article that provides the first description of a targeted gene insertion approach to correct the genetic mutation underlying XMEN disease. Next, we'll cover results of a phase 2 study that provides proof-of-principle that the JAK/STAT pathway is a promising target for the treatment of peripheral T-cell lymphomas. We'll close with a study providing precise and up-to-date estimates on the incidence of intracranial hemorrhage in patients with hemophilia that could have important implications for preventive strategies.
Please join Guest Host Mercedes Carnethon, author Jason Roberts, and Associate Editor Vlad Zaha as they discuss the article "Epigenetic Age and the Risk of Incident Atrial Fibrillation." Dr. Carolyn Lam: Welcome to Circulation on the Run, your weekly podcast summary and backstage pass to the journal and its editors. We're your co-host, I'm Dr. Carolyn Lam, Associate Editor from the National Heart Center in Duke National University of Singapore. Dr. Greg Hundley: And I'm Dr. Greg Hundley Associate Editor, Director of the Pauley Heart Center at VCU Health in Richmond, Virginia. Well, Carolyn, this week's feature we're going to learn more about the risk of incident atrial fibrillation, but as that pertains to epigenetics. But before we get to that feature, how about we grab a cup of coffee and get started on some of the other articles in the issue. Would you like to go first? Dr. Carolyn Lam: I would love to. And the first paper I want to highlight asks the question, are social economic variables associated with 30 day survival after out of hospital cardiac arrest. And this comes from Dr. Jonsson from Karolinska Institute in Stockholm, Sweden, and colleagues. They linked data from the Swedish Registry of Cardiopulmonary Resuscitation with individual level data on social economic factors. In other words, educational level and disposable income, all from statistics, Sweden. And what they found was that both higher disposable income and higher educational level independently associated with better 30 day survival following out of hospital cardiac arrest. The relationship between disposable income and 30 day survival was more robust for mediating factors compared to educational level. Dr. Greg Hundley: Oh, wow Carolyn. Really interesting in a very, what I would call hot topic these days. So what are the clinical implications of this particular study? Dr. Carolyn Lam: Well, the results really highlight the importance of preventive efforts aimed at patients with lower social economic status. And these preventive actions could include both early recognition and warning signs and for example, CPR and AED training. So very lovely paper there. Dr. Greg Hundley: Absolutely. Very nice Carolyn. Well, my first paper comes to us from Dr. Nan Wang from Columbia University Medical Center. And Carolyn this paper focuses on a common genetic variant called link RS 3184504, and it is associated with increased platelet and neutrophil counts, coronary artery disease, thrombotic stroke, and autoimmune diseases. And so this research group previously has shown that hematopoietic link deficiency synergizes with hyperlipidemia to promote platelet production and activation, neutrophilia, platelet neutrophil aggregates, atherosclerosis and arterial thrombosis, all of those things. So platelet activation and platelet neutrophil interactions have been shown to promote neutrophil extracellular traps or net formations. So nets are formed when neutrophils release their contents leading to the formation web-like structures made of DNA, myeloperoxidase, citrullinated histone and proteases that entrap and kill bacteria. Now, while nets may help to suppress infection, the formation of nets called NETosis in blood vessels can promote atherosclerosis and thrombosis. And so this study was undertaken to investigate the hypothesis that linked deficiency might promote NETosis leading to formation of unstable atherosclerotic plaques, and arterial thrombosis. Dr. Carolyn Lam: Wow. What a really neat hypothesis and NETosis. I learn new things all the time. So what do they find? Dr. Greg Hundley: Right Carolyn. First of all, hypercholesterolemic mice with hematopoietic link deficiency displayed accelerated arterial thrombosis with nets in thrombi and these changes were reversed by PAD4 deficiency or OxPL antibodies. Second, linked deficient platelet from hyperlipidemic mice expose and release increased OxPL when activated promoting NETosis, when incubated with link deficient neutrophils. Third, an AntiOxPL antibody reduced OxPL levels, NETosis and arterial thrombosis specifically in link deficient mice, and finally Carolyn targeting atherothrombotic risk using OxPL antibodies might be particularly effective in genetically defined populations with reduced link function or increased JAK-STAT signaling. Dr. Carolyn Lam: Wow. Okay. So they proved their hypothesis. Could you sum it up for us, Greg? Dr. Greg Hundley: You bet Carolyn. So this foundational work suggests that perhaps future studies targeting NETosis and OxPL in patients carrying the common link loss of function variant, could reduce atherothrombotic risk. Dr. Carolyn Lam: Wow. Thanks, Greg. My next paper is super interesting in its approach. Listen up. Now the assessment of the relationship between myocardial ATP production and cardiac workload. We know is important for better understand disease development and choice of nutritional or pharmacological treatment strategies. So what Dr. Berndt from Charity University and colleagues did, was they developed a comprehensive physiology based mathematical model of cardiac energy metabolism. And this model is called cardiokine one. And what it does is it recapitulates numerous experimental findings on cardiac metabolism obtained with isolated cardiomyocytes, perfused animal hearts and in vivo studies with humans. The model encompassed all pathways along, which the possible energy delivering substrates like glucose, long chain fatty acids, keto bodies, acetate, branch chain, amino acids are utilized. Dr. Carolyn Lam: They use the proteomic space, the abundance of metabolic enzymes and cardiac tissue to generate individualized metabolic models of cardiac energy metabolism. And so to prove their case, they further applied this approach to the left ventricles of controls in patients with mitral insufficiency and aortic stenosis, and showed that despite overall preserved systolic function, the ATP producing capacity of these left ventricles of patients with valvular dysfunction was generally diminished and correlated positively with mechanical energy demand and cardiac output. Dr. Greg Hundley: So Carolyn really interesting findings. Sort of linking metabolism them with ventricular dysfunction in those with valvular heart disease. So what were the clinical implications here? What's the take home? Dr. Carolyn Lam: Well, this methodology is just awesome, but what they also found I think is a very important physiological principle. And that is, while metabolic capacity have a significant correlation with biomechanical properties like myocardial power and cardiac output, they can also vary considerably between individual patients and therefore help us to understand in future perhaps why some patients develop heart failure over time while others with similar hemodynamic conditions do not. So just interesting. I think it just opens the space to a lot more. Dr. Greg Hundley: Absolutely beautiful summary there Carolyn. Well, in the rest of the mailbag for this issue, we have an exchange of letters between Professors Hu and Trifon on the previously published paper, entitled “Short Term Treatment with Aspirin plus Clopidogrel Compared to Monotherapy of Aspirin May Not Significantly Decrease the Risk of Stroke Recurrence.” Also, there's a Research Letter from Professor Catalucci entitled, “Nano miR-133A Replacement Therapy, Blunts Pressure Overloaded Induced Heart Failure.” And then finally Carolyn, there's an In-Depth article from Professor Aengevaeren entitled, “Exercise-Induced Cardiac Troponin Elevations From Underlying Mechanisms to Clinical Science.” Well Carolyn, how about we get onto that feature discussion and learn more about incident atrial fibrillation and the age of epigenetics. Dr. Carolyn Lam: Let's go. Dr. Mercedes Carnethon: Welcome to this episode of Circulation on the Run, where we're going to have a very exciting discussion about a paper on epigenetic age and the risk of incident atrial fibrillation. We're extremely excited to have the lead author here with us, Dr. Jason Roberts from the Population Health Research Institute, McMaster University and Hamilton Health Sciences in Ontario Canada. And I am really excited to host this episode alongside the handling editor. My name is Mercedes Carnethon and I'm the professor and vice chair of Preventive Medicine at the Northwestern University School of Medicine. And I'm pleased to be hosting this with Dr. Vlad Zaha from UT Southwestern Medical School, who was the associate editor who handled the piece. So I'm really excited to jump right into this because I think there's a lot that we can all learn from this. So welcome Jason, and thank you so much, Vlad. Dr. Jason Roberts: Thank you so much for having me, it's a delight to be here. Dr. Mercedes Carnethon: So Jason, tell us a little bit about the rationale for this study, what you found and what it means. Dr. Jason Roberts: Absolutely. So as a cardiac arrhythmia specialist, I see a lot of patients with atrial fibrillation. And in 2021, our understanding of its underlying pathophysiology still remains modest. Our treatment strategies for the condition are also somewhat modest, although catheter ablation and antiarrhythmic drugs can potentially be very effective. In the context of these limitations, they're also exacerbated to some extent by the prevalence of atrial fibrillation, increasing dramatically in developed countries. Part of this is related to the obesity epidemic. Things like hypertension increasing becoming more common, but because atrial fibrillation is age dependent and because of our aging populations in developed countries, this is felt to have a major contribution to the growing prevalence of atrial fibrillation. Unlike obesity and hypertension and other risk factors, which are potentially modifiable, chronological aging is viewed as non-modifiable. It's not something that we can tackle. That said, we know within the population and just from personal experience that people age at different rates. There are some people that are 65 who behave more like they're 50, other people that are 50 who behave more like they're 65. Dr. Jason Roberts: And in that context, biological aging, we wondered whether or not, does biological aging independent of chronological aging potentially impacts the risk of atrial fibrillation. If that was the case, because there are gradually accumulating to suggest that biological aging is potentially modifiable, that could potentially open up the possibility of tackling aging as a respective for atrial fibrillation. So that drove us to ask this question. In terms of what we found in the approach that we used. So we used our biological marker of aging, was something called an epigenetic clock. So it's been found that modifications to DNA, specifically methylation at CpG at dinucleotides, they correlate with aging. This has been appreciated for a few decades. It was initially felt that with aging, methylation levels gradually reduced over time. But with more careful interrogation, it's shown that there's patterns. Some methylation areas increase, other methylation areas there's decreases. Dr. Jason Roberts: And Steve Horvath, who is a scientist at UCLA has found that using mathematical algorithms, you're able to very accurately ascertain chronological age based on the patterns of DNA methylation, he's called these things epigenetic o'clock. That said, even though they very accurately ascertain chronological age, they aren't perfect in each individual in terms of matching up to their chronological age, but that's actually turned out to be a good thing. So when people, their epigenetic age is older than their chronological age, they're said to have positive epigenetic age acceleration. They may be biologically older than their actual chronological age. And then the reverse also holds. So using this concept of epigenetic age acceleration, we ask whether or not do people that are older biologically on the basis of their epigenetic age, do they have an increased risk of atrial fibrillation? And then we tackle that using a few different core works that I'm certainly happy to elaborate on in terms of what we found. Dr. Jason Roberts: So we used three population based cohorts from the United States, the well known Framingham Heart Study, the Cardiovascular Health Study and Eric as well. There were approximately just under 6,000 people from those studies that had undergone genome wide methylation analysis that in the enabled us to calculate their epigenetic ages. The follow period for these people was just under 13 years. And then we look to see whether or not these epigenetic clocks associated with instant atrial fibrillation. In these cohorts, we look at five different clocks. So there's the Horvath Clock and the Hannum clock that were designed to predict chronological aging. The more recent clocks, things like DNAm PhenoAge and DNAm GrimAge are more designed to predict aspects of clinical phenotype and also mortality. We found that in unadjusted analyses, all of these clocks were associated with atrial fibrillation. When we then adjusted for multiple different clinical variables, we found that the DNAm PhenoAge clock and the DNAm GrimAge clock continued to exhibit statistically significant associations with atrial fibrillation. Dr. Jason Roberts: Interestingly, the multi-variable adjustment, one concern is, do these clinical factors, are they confounders where we should be adjusting, or are they potentially mediators. If we adjust for mediators that potentially masks the effect of the clock. But regardless of how we treat them both DNAm PhenoAge and DNAm GrimAge, we're associated with increased risks of incident atrial fibrillation. Alluding to the possibility that biological aging independent of chronological aging is important in terms of determining risk for atrial fibrillation. And it may be that if we're able to modify biological aging, we could potentially reduce the risk of atrial fibrillation. So that's the study in a nutshell. Dr. Mercedes Carnethon: No, that is really exciting. You said something early on about chronological age being immutable. And I would have to say, both Vlad and I are not aging. And in fact, we are going in the opposite direction. If only this were not just an audio podcast, you would see that I steadily gotten younger and younger and I'm suddenly about 25 now. But no, these are really important findings. I really like the innovation of using multiple different strategies to characterize epigenetic age and genetic aging. So tell me Vlad, I want to turn to you. When this came across your desk, what excited you about this particular piece and why did you think that it would be of great interest to our readership? Dr. Vlad Zaha: Good morning Merci and Jason. This is a great question. And as in associate editor at Circulation for the bridging discipline section, it was fascinating to see this topic coming on my desk, thinking about all the genome wide association studies in nature of fibrillation and predisposition to atrial fibrillation, that in that case would not be changed by interventions because of different loci that would be determined. This was coming as a completely new perspective that was opening some new potentials. And it was very interesting to see some of the findings. Dr. Mercedes Carnethon: Certainly. So Jason, I have a question. So what surprised you about the findings of this particular study? Jason Roberts: Yeah, that's a great question. So we had hoped that biological aging would be associated with atrial fibrillation. I think the concept of being able to tackle biological aging is exciting. In terms of what surprised us, I guess we were hoping for these results, I guess. Dr. Mercedes Carnethon: Yeah. Dr. Jason Roberts: But we were…Yeah. So I guess we were pleasantly surprised that our hypothesis was born out. It's important to note that the epigenetic clocks don't tell the full story with chronological aging. So after we insert the clock into the model, chronological age continues to remain associated with instant atrial fibrillation. So this measure biological aging is just part of the story. So I think that's very important. I had wondered whether or not inserting the epigenetic clocks would that potentially eliminate the subsequent association of chronological aging. So that finding suggests it's part of the story. Dr. Jason Roberts: I think that in terms of the overall concept, the idea of this being reversible really excites me. In terms of the approach of how to reverse biological aging. Right now healthy lifestyle seems to be very important. I think it provides more evidence to suggest to patients with atrial fibrillation, living healthy from a diet perspective, from exercise, keeping your weight under control, all of these things that seem to impact epigenetic aging and biological aging can be helpful for preventing atrial fibrillation. So I think that can help reinforce this message to our patients. Dr. Jason Roberts: I think ultimately in terms of where we'll be at in 15 to 20 years, it's possible that new therapies in the future are developed that are able to more powerfully address biological aging. As you alluded to, will it be possible to reverse biological aging as you and Vlad are experiencing that? Dr. Mercedes Carnethon: Most definitely. Yes. Dr. Jason Roberts: I think it may be possible. This is an intense area of investigation that's being pursued and it's still in its relative infancy. But I think that could it be small molecules? Could it be potentially gene editing that can help adjust biological aging and not only increase lifespan, but also health span? I think those concepts are really exciting. Dr. Mercedes Carnethon: I completely agree. There's a lot of richness in this paper and I think our readership is going to really enjoy digging in. Part of the richness is the use of three different cohorts and the use of multiple measures of epigenetic age. And I think you provided a really nice description of the unique information that each of these markers of epigenetic age provide. One thing I note are differences in the strength of association across the different measures of epigenetic age, which I think makes sense, because you said they characterize different aspects of the phenomenon, but I also see what looks like some variability across the cohorts with Framingham in particular seeming to stand out. And that being the only cohort that is 100% one race. It's white. Versus both the cardiovascular health study and the Eric study, which have more diverse study populations. I'm wondering what your hypothesis is about the differential strength of association that it seems Framingham is demonstrating and what you think is possibly the source of those differences. Dr. Jason Roberts: Yeah. I think those are great questions for all of genetics. The question is, does it apply to all races? For example, polygenic risk scores. It seems like when a polygenic risk scores develop for one race, it may not perfectly translate over to other races. So how relevant is that for epigenetic age acceleration. In this study, I think it's difficult to make definitive conclusions about it. We needed the three cohorts to have adequate statistical power in terms of being able to determine a differential effect of race. I think it would really be primarily hypothesis generating. We weren't really powered to look at the different races. So it's difficult for me to comment. Dr. Jason Roberts: I think ultimately and I want to believe anyways, that epigenetic age acceleration is relevant to all races, but in terms of, was it race that drove the differential impacts that we saw to some extent in terms of the magnitude of the hazard ratios, it's difficult to know in terms of tests for interaction and were these actually truly statistically different. We weren't adequately powered to address that hypothesis. So it's difficult for me to comment in a definitive matter I'd say. And sorry to cop out on… Dr. Mercedes Carnethon: No, not at all. I mean, I think there are a lot of things where there is no firm answer and that was just one of my hypotheses when I saw what was going on differently across the cohorts. I think that's a perfectly reasonable answer that sets us on a course for thinking about how we set up future studies. So I wanted to turn to you Vlad for the closing frame around this. As the editor, how do you hope that our readership will use these findings? Dr. Vlad Zaha: That is an excellent question. I was going to follow on this excellent unpacking of the core messages of the manuscript by Jason here to get his perspective as an electrophysiologist into what these type of work may represent for the everyday life of an electrophysiologist in the connecting with the patients and how would this type of approach influence, and maybe now, maybe later when our treatment for atrial fibrillation. Dr. Jason Roberts: Yeah. So that's a great question. I think, as I alluded to some extent before, as far as reinforcing healthy lifestyle, I think this provides more evidence in that respect. So we know that things like excessive alcohol consumption, being excessively obese, poor diets, not engaging in enough exercise, all of those things seem to accelerate your epigenetic age. And those are all things that we think or feel that are important with atrial fibrillation in terms of driving the path of physiology and people progressing. So I think this gives more data to us to reinforce the patients that in addition to the treatments that we're offering in terms of catheter ablation and antiarrhythmic drugs, the concern is that the substrate can continue you to progress. And that's likely driven by to some extent these modifiable risk factors. So keeping all of these under best control as possible, and hence trying to slow your biological aging as much as possible. Dr. Jason Roberts: I think that this will provide us more motivation to push these messages to our patients. A lot of patients can sometimes be like, "Let's just get on with a catheter ablation and I want to get on with my life…" but it really I think, provides more data to suggest that modifying these very important risk factors that can lead to accelerated biological agents, is very important. And in terms of the future as mentioned, so chronological aging, as people get older, people view it as, "Well, there's nothing I can do, and I'm just going to get gradually more and more unhealthy." I think, and this is somewhat futuristic, but to what extent can we slow biological aging? Can we potentially reverse it in the future? There's certainly lots of very compelling and interesting animal work and people are starting to delve into this in a big way. Dr. Jason Roberts: And not only to increase lifespan, will we some day live until we're 200. Who knows? But the concept of prolonging your health span as well. So the number of healthy years that you have before your body starts to gradually give way, I guess to some extent. Hopefully in the future will have therapies that will help keep us healthy. And if we do that increased health span, I think this data suggests that atrial fibrillation will be one thing that benefits from this. So hopefully in the future, maybe in terms of curbing the AFib pandemic, being able to address biological aging will help push things in the right direction. Dr. Mercedes Carnethon: Well, thank you so much Jason. And thank you so much Vlad for your thoughtful questions. I really like that the final bottom line leans towards my area as an epidemiologist, which is maintaining and promoting healthy lifestyles as a way to hopefully help prevent some of the difficulties of atrial fibrillation and its long-term outcomes. Really pleased to have you on this episode of Circulation on the Run, Jason, and thank you again Vlad, and I hope everyone enjoys this episode of the journal and has an opportunity to really dig into this piece. This is Mercedes Carnethon from Northwestern University Feinberg School of Medicine, saying thanks for listening today. Dr. Greg Hundley: This program is copyright of the American Heart Association 2021. The opinions expressed by speakers in this podcast are their own and not necessarily those of the editors or of the American heart association for more visit ahajournals.org.
Professor Atul Deodhar, professor of medicine at Oregon Health & Science University. Join Professor Peter Nash as he interviews authors of recent notable papers in rheumatology. In this edition, Professor Atul Deodhar discusses his review on JAK-STAT signalling in spondyloarthritis and what that means for the use of JAK inhibitors for SpA treatment.
Prof Iain McInnes reviews two papers this month, and discusses the increased risk of HZ infection with upadacitinib, as well as the role of the JAK-STAT pathway in SpA pathenogenesis. Keep-up to date with the latest in arthritis and cytokine signalling with Prof Iain McInnes. Everything discussed is available in a more detailed slide format in the publications section at cytokinesignalling.com.
This podcast will discuss data from a phase II trial evaluating the dose-adjusted EOPCH-R chemo-immunotherapy regimen for the treatment of primary mediastinal B-cell lymphoma in children. TRANSCRIPT [MUSIC PLAYING] LISA GIULINO-ROTH: This JCO podcast provides observations and commentary on the JCO article "Dose-Adjusted Rituximab Therapy in Children and Adolescents with Primary Mediastinal B-cell Lymphoma, a Multicenter Phase II Trial" by Burke et al. My name is Lisa Giulino-Roth, and I am a pediatric oncologist at Weill Cornell Medical College in New York. My oncology specialty is lymphoma in children, adolescents, and young adults. I have no relevant disclosures. Primary mediastinal B-cell lymphoma, or PMBCL, is an aggressive non-Hodgkin lymphoma derived from thymic B-cells. While previously classified as a subtype of diffuse large B-cell lymphoma, PMBCL is now recognized as a distinct clinical and pathologic entity. Unlike diffuse large B-cell lymphoma, PMBCL has a peak incidence among adolescents and young adults and is more common in females. PMBCL also shares many molecular characteristics with Hodgkin lymphoma, including alterations in JAK-STAT pathway signaling and amplification of the 9p24.1 locus, leading to upregulation of PD-L1. Adults with PMBCL have historically been treated on regimens designed for diffuse large B-cell lymphoma, which in the US was most commonly R-CHOP and radiation therapy. More recently, adult patients have been treated with a dose-adjusted EPOCH-R regimen, which is composed of dose-adjusted etoposide, doxorubicin, and cyclophosphamide with vincristine, prednisone, and rituximab. This radiation-free approach is of interest, given this young and predominantly female population who are at risk for significant long-term toxicity from chest radiation. In a single center NCI-led study by Dunleavy and colleagues, dose-adjusted EPOCH-R was administered for six to eight cycles without radiation therapy and resulted in excellent outcomes with a five-year event free survival of 93% and overall survival of 97% among 51 adult patients. Pediatric patients with PMBCL have historically been treated on regimens designed for mature B non-Hodgkin lymphoma, which in pediatrics is most commonly Burkitt lymphoma or diffuse large B-cell lymphoma. These dose intensive multi-agent regimens include doxorubicin, high dose methotrexate, and intrathecal chemotherapy without radiation. Outcomes for children with PMBCL treated on these regimens are inferior to pediatric patients with diffuse large B-cell lymphoma treated on the same protocol. Children with PMBCL have a five-year event-free survival ranging from 65% to 75% in different international series. Given the excellent outcomes observed with dose-adjusted EPOCH-R in the adult NCI trial, an international phase II trial of this approach was conducted by two cooperative groups, The European Intergroup for Childhood Non-Hodgkin Lymphoma and the Children's Oncology Group. This single arm trial enrolled patients age 18 and under with primary mediastinal B-cell lymphoma. All patients were treated with six cycles of dose-adjusted EPOCH-R without radiation. The primary endpoint was event-free survival with events defined as any of the following-- viable cells in any residual mass after six cycles of treatment, relapse, progressive disease, secondary malignancy, or death from any cause. The four-year event-free survival from this trial would be compared with the event-free survival from historic controls, which was estimated at 67%. A total of 46 pediatric patients were enrolled between 2012 and 2016. All patients received six cycles of dose-adjusted EPOCH-R without RT. At a median follow-up of 59 months, there were 14 events, including four patients with viable cells in the residual mass at the completion of therapy, eight progressions or relapses, and two secondary malignancies, including one case of Hodgkin lymphoma and one case of acute promyelocytic leukemia. The event-free survival of the entire cohort at four years was disappointing at 69.6% with a 95% confidence interval of 55.2% to 80.9%. This was not statistically different than historic controls treated on pediatric mature B and HL regimens. Overall survival at four years was 84.8% with a 95% confidence interval of 71.8% to 92.4%. The authors acknowledge several limitations in the current study and challenges when comparing this study to the NCI trial. Not all patients adhered to the dose escalation rules, and 29% should have received a higher dose level in at least one course of treatment. Among the 10 cases of local relapse or primary refractory disease, five were noted to have a failure to dose escalate, including one patient with a clinical complication that precluded dose escalation. Comparing this trial to the NCI trial is challenging due to several important differences. Adults in the NCI trial were treated with six or eight cycles of dose-adjusted EPOCH-R based on the response between cycles 4 and 6. In pediatrics, eight cycles was not deemed appropriate, given the potential for greater than 600 milligrams per meter squared of cumulative doxorubicin exposure and concern for significant long-term cardiac toxicity at this exposure level. In addition, the NCI trial did not consider residual viable cells or secondary malignancy as an event, both of which were defined as events in the current pediatric trial. In a reanalysis of the pediatric data using the NCI event definitions, there was only a modest change in event-free survival with a four-year event-free survival of 73.9%. So where does this leave dose-adjusted EPOCH-R and the management of pediatric patients with PMBCL? In my opinion, there's no single superior regimen to treat pediatric PMBCL. Outcomes are similar across regimens. However, the toxicities are different. Dose-adjusted EPOCH-R offers significantly less short-term toxicity, but the potential for a higher cumulative doxorubicin dose compared to pediatric mature B and HL regimens. Regardless of the chemotherapy backbone, it is clear that for children with PMBCL, outcomes remain suboptimal, and further studies are needed to advance treatment. Given the rare nature of PMBCL and the peak incidence in the AYA population, combined pediatric and adult trials may allow us to evaluate novel agents and advance outcomes. Both children and adults with PMBCL may benefit from the incorporation of novel agents. Retrospective multicenter data from adults treated with dose-adjusted EPOCH-R have also failed to reproduce the excellent outcomes observed in the NCI trial. In two large retrospective series, adults with PMBCL treated with dose-adjusted EPOCH-R had a two- and three-year progression-free survival of 85% and 87% respectively. To advance outcomes in PMBCL across age groups, our team at the Children's Oncology Group in collaboration with Alliance and the National Clinical Trials Network is conducting a randomized phase III trial of the checkpoint inhibitor nivolumab in combination with chemo immunotherapy for adult and pediatric patients with PMBCL. Checkpoint inhibitors, including pembrolizumab and nivolumab, have demonstrated efficacy and PMBCL in the relapsed setting. And pembrolizumab is FDA approved for children and adults with relapsed PMBCL after two or more lines of therapy. However, these agents have not been evaluated in the upfront setting. In this trial, the treating physician will choose between R-CHOP and dose-adjusted EPOCH-R as the chemotherapy backbone. And patients will then be randomized to standard of care with six cycles of chemo immunotherapy alone or six cycles of nivolumab plus chemo immunotherapy. We are optimistic that this will define the role for checkpoint inhibition in the upfront management of PMBCL and work towards improved outcomes for both adult and pediatric patients. This concludes this JCO podcast. Thank you for listening. [MUSIC PLAYING] SPEAKER: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care, and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. For more original research, editorials, and review articles, please visit us online at jco.org. This production is copyrighted to the American Society of Clinical Oncology. Thank you for listening.
That there are senescence-associated decreases in the JAK-STAT signaling transduction cascade has been observed in human lymphocyte lineages. This phenomena, as associated with a decreased JAK- tyrosine phosphorylation of STAT5, is linked to plasma membrane cholesterol content. Therefore, plasma membrane cholesterol content is involved in T cells modulation and proliferation. Acid sphingomyelinase- mediated ceramide lipid raft mobilization and aggregation of membrane receptors plays a crucial role in this pathobiochemical dynamic leading to multiple disease and comorbidity states in the elderly. Classical Papers Examined: Mech Ageing Dev. 2001 Sep 15;122(13):1413-30 Cytometry A. 2006 Mar;69(3):189-91 J Lipid Res. 2007 Jan;48(1):19-29. doi: 10.1194 --- Send in a voice message: https://anchor.fm/dr-daniel-j-guerra/message Support this podcast: https://anchor.fm/dr-daniel-j-guerra/support
Go online to PeerView.com/TWD860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, experts in psoriatic disease offer learners an in-depth look at the complex pathophysiology of psoriasis, current management paradigms, and challenges in the care of patients with moderate to severe disease. Upon completion of this accredited CE activity, participants should be better able to: Recognize the burden of disease and unmet needs experienced by patients with moderate to severe psoriasis, Discuss the rationale for blocking the JAK-STAT pathway with small molecules as a treatment approach to psoriasis, Compare and contrast novel JAK inhibitors for the treatment of psoriasis in the context of selectivity, efficacy, and safety, Treat psoriasis in accordance with current evidence and guidelines, identifying patients with moderate to severe disease, who would likely derive benefit from novel nonbiologic oral therapeutic options.
Go online to PeerView.com/TWD860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, experts in psoriatic disease offer learners an in-depth look at the complex pathophysiology of psoriasis, current management paradigms, and challenges in the care of patients with moderate to severe disease. Upon completion of this accredited CE activity, participants should be better able to: Recognize the burden of disease and unmet needs experienced by patients with moderate to severe psoriasis, Discuss the rationale for blocking the JAK-STAT pathway with small molecules as a treatment approach to psoriasis, Compare and contrast novel JAK inhibitors for the treatment of psoriasis in the context of selectivity, efficacy, and safety, Treat psoriasis in accordance with current evidence and guidelines, identifying patients with moderate to severe disease, who would likely derive benefit from novel nonbiologic oral therapeutic options.
PeerView Family Medicine & General Practice CME/CNE/CPE Video Podcast
Go online to PeerView.com/TWD860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, experts in psoriatic disease offer learners an in-depth look at the complex pathophysiology of psoriasis, current management paradigms, and challenges in the care of patients with moderate to severe disease. Upon completion of this accredited CE activity, participants should be better able to: Recognize the burden of disease and unmet needs experienced by patients with moderate to severe psoriasis, Discuss the rationale for blocking the JAK-STAT pathway with small molecules as a treatment approach to psoriasis, Compare and contrast novel JAK inhibitors for the treatment of psoriasis in the context of selectivity, efficacy, and safety, Treat psoriasis in accordance with current evidence and guidelines, identifying patients with moderate to severe disease, who would likely derive benefit from novel nonbiologic oral therapeutic options.
PeerView Family Medicine & General Practice CME/CNE/CPE Audio Podcast
Go online to PeerView.com/TWD860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, experts in psoriatic disease offer learners an in-depth look at the complex pathophysiology of psoriasis, current management paradigms, and challenges in the care of patients with moderate to severe disease. Upon completion of this accredited CE activity, participants should be better able to: Recognize the burden of disease and unmet needs experienced by patients with moderate to severe psoriasis, Discuss the rationale for blocking the JAK-STAT pathway with small molecules as a treatment approach to psoriasis, Compare and contrast novel JAK inhibitors for the treatment of psoriasis in the context of selectivity, efficacy, and safety, Treat psoriasis in accordance with current evidence and guidelines, identifying patients with moderate to severe disease, who would likely derive benefit from novel nonbiologic oral therapeutic options.
Go online to PeerView.com/TWD860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, experts in psoriatic disease offer learners an in-depth look at the complex pathophysiology of psoriasis, current management paradigms, and challenges in the care of patients with moderate to severe disease. Upon completion of this accredited CE activity, participants should be better able to: Recognize the burden of disease and unmet needs experienced by patients with moderate to severe psoriasis, Discuss the rationale for blocking the JAK-STAT pathway with small molecules as a treatment approach to psoriasis, Compare and contrast novel JAK inhibitors for the treatment of psoriasis in the context of selectivity, efficacy, and safety, Treat psoriasis in accordance with current evidence and guidelines, identifying patients with moderate to severe disease, who would likely derive benefit from novel nonbiologic oral therapeutic options.
Go online to PeerView.com/TWD860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, experts in psoriatic disease offer learners an in-depth look at the complex pathophysiology of psoriasis, current management paradigms, and challenges in the care of patients with moderate to severe disease. Upon completion of this accredited CE activity, participants should be better able to: Recognize the burden of disease and unmet needs experienced by patients with moderate to severe psoriasis, Discuss the rationale for blocking the JAK-STAT pathway with small molecules as a treatment approach to psoriasis, Compare and contrast novel JAK inhibitors for the treatment of psoriasis in the context of selectivity, efficacy, and safety, Treat psoriasis in accordance with current evidence and guidelines, identifying patients with moderate to severe disease, who would likely derive benefit from novel nonbiologic oral therapeutic options.
Curcumin: modulator of key molecular signaling pathways in hormone-independent breast cancer Monash University Malaysia, August 10, 2021 According to news reporting originating from Selangor, Malaysia, research stated, “Breast cancer is the most frequently diagnosed cancer and the leading cause of cancer death among women worldwide.” Our news correspondents obtained a quote from the research from Monash University Malaysia: “Despite the overall successes in breast cancer therapy, hormone-independent HER2 negative breast cancer, also known as triple negative breast cancer (TNBC), lacking estrogens and progesterone receptors and with an excessive expression of human epidermal growth factor receptor 2 (HER2), along with the hormone-independent HER2 positive subtype, still remain major challenges in breast cancer treatment. Due to their poor prognoses, aggressive phenotype, and highly metastasis features, new alternative therapies have become an urgent clinical need. One of the most noteworthy phytochemicals, curcumin, has attracted enormous attention as a promising drug candidate in breast cancer prevention and treatment due to its multi-targeting effect. Curcumin interrupts major stages of tumorigenesis including cell proliferation, survival, angiogenesis, and metastasis in hormone-independent breast cancer through the modulation of multiple signaling pathways. The current review has highlighted the anticancer activity of curcumin in hormone-independent breast cancer via focusing on its impact on key signaling pathways including the PI3K/Akt/mTOR pathway, JAK/STAT pathway, MAPK pathway, NF-qB pathway, p53 pathway, and Wnt/b-catenin, as well as apoptotic and cell cycle pathways.” According to the news reporters, the research concluded: “Besides, its therapeutic implications in clinical trials are here presented.” Ultrasound remotely triggers immune cells to attack tumors in mice without toxic side effects University of California San Diego, August 11, 2021 Bioengineers at the University of California San Diego have developed a cancer immunotherapy that pairs ultrasound with cancer-killing immune cells to destroy malignant tumors while sparing normal tissue. The new experimental therapy significantly slowed down the growth of solid cancerous tumors in mice. The team, led by the labs of UC San Diego bioengineering professor Peter Yingxiao Wang and bioengineering professor emeritus Shu Chien, detailed their work in a paper published Aug. 12 in Nature Biomedical Engineering. The work addresses a longstanding problem in the field of cancer immunotherapy: how to make chimeric antigen receptor (CAR) T-cell therapy safe and effective at treating solid tumors. CAR T-cell therapy is a promising new approach to treat cancer. It involves collecting a patient's T cells and genetically engineering them to express special receptors, called CAR, on their surface that recognize specific antigens on cancer cells. The resulting CAR T cells are then infused back into the patient to find and attack cells that have the cancer antigens on their surface. This therapy has worked well for the treatment of some blood cancers and lymphoma, but not against solid tumors. That's because many of the target antigens on these tumors are also expressed on normal tissues and organs. This can cause toxic side effects that can kills cells—these effects are known as on-target, off-tumor toxicity. “CAR T cells are so potent that they may also attack normal tissues that are expressing the target antigens at low levels,” said first author Yiqian (Shirley) Wu, a project scientist in Wang's lab. “The problem with standard CAR T cells is that they are always on—they are always expressing the CAR protein, so you cannot control their activation,” explained Wu. To combat this issue, the team took standard CAR T cells and re-engineered them so that they only express the CAR protein when ultrasound energy is applied. This allowed the researchers to choose where and when the genes of CAR T cells get switched on. “We use ultrasound to successfully control CAR T cells directly in vivo for cancer immunotherapy,” said Wang, who is a faculty member of the Institute of Engineering in Medicine and the Center for Nano-ImmunoEngineering, both at UC San Diego. What's exciting about the use of ultrasound, noted Wang, is that it can penetrate tens of centimeters beneath the skin, so this type of therapy has the potential to non-invasively treat tumors that are buried deep inside the body. The team's approach involves injecting the re-engineered CAR T cells into tumors in mice and then placing a small ultrasound transducer on an area of the skin that's on top of the tumor to activate the CAR T cells. The transducer uses what's called focused ultrasound beams to focus or concentrate short pulses of ultrasound energy at the tumor. This causes the tumor to heat up moderately—in this case, to a temperature of 43 degrees Celsius (109 degrees Fahrenheit)—without affecting the surrounding tissue. The CAR T cells in this study are equipped with a gene that produces the CAR protein only when exposed to heat. As a result, the CAR T cells only switch on where ultrasound is applied. The researchers put their CAR T cells to the test against standard CAR T cells. In mice that were treated with the new CAR T cells, only the tumors that were exposed to ultrasound were attacked, while other tissues in the body were left alone. But in mice that were treated with the standard CAR T cells, all tumors and tissue expressing the target antigen were attacked. “This shows our CAR T-cell therapy is not only effective, but also safer,” said Wu. “It has minimal on-target, off-tumor side effects.” The work is still in the early stages. The team will be performing more preclinical tests and toxicity studies before it can reach clinical trials. Lycopene ameliorates diabetic osteoporosis via anti-inflammatory, antioxidation Shaanxi University of Technology (China), August 10, 2021 According to news originating from Shaanxi University of Technology research stated, “Diabetic osteoporosis (DOP) is one of the complications of diabetes, with high morbidity, and high disability rate. Here, we established a diabetic rat model and administered lycopene to observe its effect on DOP.” Our news editors obtained a quote from the research from Shaanxi University of Technology: “Our results showed that ten weeks lycopene treatment lowered blood glucose, improved diabetic induced polydipsia, overeating and body weight loss. Lycopene treatment also enhanced bone mineral density, restored bone mechanical and bone Micro-CT parameters of diabetic rats. Subsequently, lycopene decreased serum inflammatory cytokines levels and increased serum anti-oxidant indicators levels. Moreover, lycopene reduced the number of bone marrow adipocytes, and osteoclasts numbers of diabetic rats. The serum bone turnover markers levels were down-regulated after lycopene treatment. Meanwhile, the bone and serum OPG, RUNX 2 expression levels were up-regulated by lycopene in diabetic rats, and the OPG/RANKL ratio was also up-regulated.” According to the news editors, the research concluded: “This study showed that lycopene could ameliorate diabetic induced bone loss via anti-inflammatory, anti-oxidation, and increasing OPG/RANKL ratio in diabetic rats. Lycopene could be used for nutritional intervention in patients with diabetic osteoporosis.” Research shows just 8 weeks of meditation studies can make your brain quicker Birmingham University (UK), August 12, 2021 Researchers at Binghamton University scanned students' brains before and after eight weeks of meditation training. Credit: Binghamton University Millions of people around the world seek mental clarity through meditation, most of them following or inspired by the centuries-old practices of Buddhism. Anecdotally, those who meditate say it helps to calm their minds, recenter their thoughts and cut through the "noise" to show what really matters. Scientifically, though, showing the effects of meditation on the human brainhave proved to be tricky. A new study from Binghamton University's Thomas J. Watson College of Engineering and Applied Science tracked how practicing meditation for just a couple of months changed the brain patterns of 10 students in the University's Scholars Program. The seed for the research came from a casual chat between Assistant Professor Weiying Dai and lecturer George Weinschenk, MA '01, Ph.D. '07, both from the Department of Computer Science. Weinschenk is a longtime meditation practitioner whose wife worked as an administrator at the Namgyal Monastery in Ithaca, which is the North American seat of the Dalai Lama's personal monastery. "I developed very close friendships with several of the monks," he said. "We would hang out together, and I even received instruction from some of the Dalai Lama's teachers. I took classes there, I read a lot and I earned a three-year certificate in Buddhist studies." Dai has studied brain mapping and biomedical image processing, and while earning her Ph.D. at the University of Pittsburgh, she tracked Alzheimer's disease patients using magnetic resonance imaging (MRI) scans. "I'm interested in brain research to see how our brains are really functioning and how all different kinds of disease affect our brain," she said. "I really have zero medical training, but I pick up all this knowledge or background from reading the literature and talking with the experts." The two faculty members had neighboring offices and shared a conversation one day about their backgrounds. Weinschenk mentioned that he had been asked to teach a semester-long class for the Scholars Program on meditation. "I told Weiying, 'Yeah, meditation really can have a transformative effect on the brain,'" Weinschenk said. "She was a little skeptical, especially about whether such a short amount of time spent learning how to meditate, whether that would make any difference. She suggested we might be able to quantify such a thing with modern technology." For the fall 2017 semester, Dai secured grant funding, and their collaboration began. Near the beginning of the semester, she took the participants to Cornell University for MRI scans of their brains. Weinschenk taught students how to meditate, told them to practice five times a week for 10 or 15 minutes, and asked them to keep a journal record of their practice. (The syllabus also included other lessons about the cultural transmissions of meditation and its applications for wellness.) "Binghamton University Scholars are high achievers who want to do the things they are assigned and do well on them, so they didn't require much prompting to maintain a regular meditation routine," he said. "To guarantee objective reporting, they would relate their experiences directly to Weiying about how frequently they practiced." The results, recently published in the journal Scientific Reports, show that meditation training led to faster switching between the brain's two general states of consciousness. One is called the default mode network, which is active when the brain is at wakeful rest and not focused on the outside world, such as during daydreaming and mind-wandering. The other is the dorsal attention network, which engages for attention-demanding tasks. The findings of the study demonstrate that meditation can enhance the brain connection among and within these two brain networks, indicating the effect of meditation on fast switching between the mind wandering and focusing its attention as well as maintaining attention once in the attentive state. "Tibetans have a term for that ease of switching between states—they call it mental pliancy, an ability that allows you to shape and mold your mind," Weinschenk said. "They also consider the goal of concentration one of the fundamental principles of self-growth." Dai and Weinschenk are still parsing through the data taken from the 2017 MRI scans, so they have yet to test other Scholars Program students. Because Alzheimer's disease and autism could be caused by problems with the dorsal attention network, Dai is making plans for future research that could use meditation to mitigate those problems. "I'm thinking about an elderly study, because this population was young students," she said. "I want to get a healthy elderly group, and then another group with early Alzheimer's disease or mild cognitive impairment. I want to see whether the changes in the brain from meditation can enhance cognitive performance. I'm writing the proposal and trying to attract the funds in that direction." Though once skeptical about the subject, "I'm pretty convinced about the scientific basis of meditation after doing this study," she added. "Maybe I'll just go to George's class when he teaches it so that I can benefit, too!" Study shows how food preservatives may disrupt human hormones and promote obesity Cedars-Sinai Medicine Institute, August 9, 2021 Can chemicals that are added to breakfast cereals and other everyday products make you obese? Growing evidence from animal experiments suggests the answer may be "yes." But confirming these findings in humans has faced formidable obstacles - until now. A study published in Nature Communications details how Cedars-Sinai investigators developed a novel platform and protocol for testing the effects of chemicals known as endocrine disruptors on humans. The three chemicals tested in this study are abundant in modern life. Butylhydroxytoluene (BHT) is an antioxidant commonly added to breakfast cereals and other foods to protect nutrients and keep fats from turning rancid; perfluorooctanoic acid (PFOA) is a polymer found in some cookware, carpeting and other products; and tributyltin (TBT) is a compound in paints that can make its way into water and accumulate in seafood. The investigators used hormone-producing tissues grown from human stem cells to demonstrate how chronic exposure to these chemicals can interfere with signals sent from the digestive system to the brain that let people know when they are "full" during meals. When this signaling system breaks down, people often may continue eating, causing them to gain weight. "We discovered that each of these chemicals damaged hormones that communicate between the gut and the brain," said Dhruv Sareen, PhD, assistant professor of Biomedical Sciences and director of the Induced Pluripotent Stem Cell Core Facility at the Cedars-Sinai Board of Governors Regenerative Medicine Institute. "When we tested the three together, the combined stress was more robust." Of the three chemicals tested, BHT produced some of the strongest detrimental effects, Sareen said. While other scientists have shown these compounds can disrupt hormone systems in laboratory animals, the new study is the first to use human pluripotent stem cells and tissues to document how the compounds may disrupt hormones that are critical to gut-to-brain signaling and preventing obesity in people, Sareen said. "This is a landmark study that substantially improves our understanding of how endocrine disruptors may damage human hormonal systems and contribute to the obesity epidemic in the U.S.," said Clive Svendsen, PhD, director of the institute and the Kerry and Simone Vickar Family Foundation Distinguished Chair in Regenerative Medicine. More than one-third of U.S. adults are considered to be obese, according to federal statistics. The new testing system developed for the study has the potential to provide a much-needed, safe and cost-effective method that can be used to evaluate the health effects of thousands of existing and new chemicals in the environment, the investigators say. For their experiments, Sareen and his team first obtained blood samples from adults, and then, by introducing reprogramming genes, converted the cells into induced pluripotent stem cells. Then, using these stem cells, the investigators grew human epithelium tissue, which lines the gut, and neuronal tissues of the brain's hypothalamus region, which regulates appetite and metabolism. The investigators then exposed the tissues to BHT, PFOA and TBT, one by one and also in combination, and observed what happened inside the cells. They found that the chemicals disrupted networks that prepare signaling hormones to maintain their structure and be transported out of the cells, thus making them ineffective. The chemicals also damaged mitochondria - cellular structures that convert food and oxygen into energy and drive the body's metabolism. Because the chemical damage occurred in early-stage "young" cells, the findings suggest that a defective hormone system potentially could impact a pregnant mother as well as her fetus in the womb, Sareen said. While other scientists have found, in animal studies, that effects of endocrine disruptors can be passed down to future generations, this process has not been proved to occur in humans, he explained. More than 80,000 chemicals are registered for use in the U.S. in everyday items such as foods, personal care products, household cleaners and lawn-care products, according to the National Toxicology Program of the U.S. Department of Health and Human Services. While the program states on its website that relatively few chemicals are thought to pose a significant risk to human health, it also states: "We do not know the effects of many of these chemicals on our health." Cost and ethical issues, including the health risk of exposing human subjects to possibly harmful substances, are among the barriers to testing the safety of many chemicals. As a result, numerous widely used compounds remain unevaluated in humans for their health effects, especially to the hormone system. "By testing these chemicals on actual human tissues in the lab, we potentially could make these evaluations easier to conduct and more cost-effective," Sareen said. Social activities help dementia patients stay sharp, avoid depression University of Sheffield (UK), August 12, 2021 Approximately 6 million people in the U.S. are suffering from dementia, as well 50 million people worldwide. There is currently no cure for the degenerative condition and medical treatments often have side effects such as vomiting, loss of appetite, and muscle pains. Now, researchers say patients can greatly benefit from a type of treatment that doesn't come with such downsides and helps their brain avoid additional decline. A new study suggests that mixing with other people helps dementia patients stay sharp and fend off depression. Scientists say the type of treatment known as “cognitive stimulation” could make living with dementia easier for hundreds of thousands of people. “Dementia is one of the biggest global challenges that we face,” says senior author Dr. Claudia von Bastian, of the University of Sheffield, in a statement. “Our research highlights that cognitive stimulation can be a safe, relatively cheap, and accessible treatment to help reduce some of the core symptoms of dementia and may even alleviate symptoms of depression.” The researchers analyzed the use of cognitive stimulation as an effective treatment for people with dementia. They found that getting patients involved in social and group activities helped combat depression and boost global cognition. Global cognition refers to five types of brain function: attention, memory, verbal fluency, language, and awareness. “It's great that governments now recognize the importance for people to live well with dementia. We've seen far more energy and resources put into developing initiatives to support this, such as cognitive stimulation, which is now used widely across the world,” notes co-author Dr. Ben Hicks, of Brighton and Sussex Medical School. “We still need to learn more about the key ingredients of cognitive stimulation which lead to these benefits and how they influence the progression of dementia. However, the absence of negative side-effects and the low costs of this treatment means the benefits are clear,” adds Dr. von Bastian. More research is needed to determine whether cognitive stimulation and other non-pharmaceutical treatments could help the growing number of people who suffer fromdementia. “Our research is the first to comprehensively interrogate the evidence base for its effectiveness, using the most up-to-date statistical techniques. While early signs are positive, there's an urgent need to improve the rigor of evaluative research and better assess the long-term benefits of cognitive stimulation. People with dementia need effective treatments, and, as a research community, this is what we must deliver,” added Dr. Hicks. Resveratrol supplementation improves arterial stiffness in type 2 diabetics Toho University (Japan), August 18 2021 A randomized, double-blind study reported on in the International Heart journal found improvements in arterial stiffness and oxidative stress among type 2 diabetics who were supplemented with resveratrol. The trial included 50 diabetic men and women who received 100 milligrams resveratrol or a placebo daily for 12 weeks. Cardio-ankle vascular index (CAVI, a novel diagnostic measure of arterial stiffness that is a marker of atherosclerosis) and blood pressure were assessed at the beginning and end of the study, in addition to blood assessments of oxidative stress and other factors. At the end of the study, subjects who received resveratrol had significantly lower blood pressure, less oxidative stress and decreased arterial stiffness in comparison with values obtained at the beginning of the study. Participants who received a placebo experienced no significant changes in these areas. “The primary finding in the present study was that oral supplementation of resveratrol for 12 weeks decreased CAVI in patients with type 2 diabetes mellitus,” authors Haruki Imamura, MD, and colleagues at Toho University Sakura Medical Center in Japan write. “Many previous studies have demonstrated increased CAVI in atherosclerotic diseases such as acute coronary syndrome and stroke, and these reports indicate that CAVI reflects organic atherosclerosis.” They suggest that a reduction in oxidative stress may be one mechanism involved in the improvement in arterial stiffness observed in this study among participants who received resveratrol. Improved endothelial function via increased nitric oxide production may be another mechanism.
The breakthrough discovery of upregulation of the JAK-STAT signaling pathway as the driving force behind myeloproliferative neoplasms (MPNs) has led... The post EHA 2021: key trial updates in myelofibrosis appeared first on VJHemOnc.
The breakthrough discovery of upregulation of the JAK-STAT signaling pathway as the driving force behind myeloproliferative neoplasms (MPNs) has led... The post EHA 2021: key trial updates in myelofibrosis appeared first on VJHemOnc.
Go online to PeerView.com/NJS860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, an expert in dermatology discusses unmet needs of patients with moderate to severe psoriasis and the clinical potential of targeting the TYK2 pathway as a novel nonbiologic oral therapeutic option. Upon completion of this accredited CE activity, participants should be better able to: Explain the role of the JAK-STAT signaling pathway in the pathophysiology of psoriasis, Summarize efficacy and safety data related to current and emerging kinase inhibitors for the treatment of psoriasis, Treat moderate to severe psoriasis in accordance with current evidence and guidelines, recognizing the role of nonbiologic therapies in addressing the burden of disease and comorbidities in individual patients.
Go online to PeerView.com/NJS860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, an expert in dermatology discusses unmet needs of patients with moderate to severe psoriasis and the clinical potential of targeting the TYK2 pathway as a novel nonbiologic oral therapeutic option. Upon completion of this accredited CE activity, participants should be better able to: Explain the role of the JAK-STAT signaling pathway in the pathophysiology of psoriasis, Summarize efficacy and safety data related to current and emerging kinase inhibitors for the treatment of psoriasis, Treat moderate to severe psoriasis in accordance with current evidence and guidelines, recognizing the role of nonbiologic therapies in addressing the burden of disease and comorbidities in individual patients.
PeerView Immunology & Transplantation CME/CNE/CPE Video Podcast
Go online to PeerView.com/NJS860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, an expert in dermatology discusses unmet needs of patients with moderate to severe psoriasis and the clinical potential of targeting the TYK2 pathway as a novel nonbiologic oral therapeutic option. Upon completion of this accredited CE activity, participants should be better able to: Explain the role of the JAK-STAT signaling pathway in the pathophysiology of psoriasis, Summarize efficacy and safety data related to current and emerging kinase inhibitors for the treatment of psoriasis, Treat moderate to severe psoriasis in accordance with current evidence and guidelines, recognizing the role of nonbiologic therapies in addressing the burden of disease and comorbidities in individual patients.
PeerView Family Medicine & General Practice CME/CNE/CPE Audio Podcast
Go online to PeerView.com/NJS860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, an expert in dermatology discusses unmet needs of patients with moderate to severe psoriasis and the clinical potential of targeting the TYK2 pathway as a novel nonbiologic oral therapeutic option. Upon completion of this accredited CE activity, participants should be better able to: Explain the role of the JAK-STAT signaling pathway in the pathophysiology of psoriasis, Summarize efficacy and safety data related to current and emerging kinase inhibitors for the treatment of psoriasis, Treat moderate to severe psoriasis in accordance with current evidence and guidelines, recognizing the role of nonbiologic therapies in addressing the burden of disease and comorbidities in individual patients.
PeerView Family Medicine & General Practice CME/CNE/CPE Video Podcast
Go online to PeerView.com/NJS860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, an expert in dermatology discusses unmet needs of patients with moderate to severe psoriasis and the clinical potential of targeting the TYK2 pathway as a novel nonbiologic oral therapeutic option. Upon completion of this accredited CE activity, participants should be better able to: Explain the role of the JAK-STAT signaling pathway in the pathophysiology of psoriasis, Summarize efficacy and safety data related to current and emerging kinase inhibitors for the treatment of psoriasis, Treat moderate to severe psoriasis in accordance with current evidence and guidelines, recognizing the role of nonbiologic therapies in addressing the burden of disease and comorbidities in individual patients.
PeerView Immunology & Transplantation CME/CNE/CPE Audio Podcast
Go online to PeerView.com/NJS860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, an expert in dermatology discusses unmet needs of patients with moderate to severe psoriasis and the clinical potential of targeting the TYK2 pathway as a novel nonbiologic oral therapeutic option. Upon completion of this accredited CE activity, participants should be better able to: Explain the role of the JAK-STAT signaling pathway in the pathophysiology of psoriasis, Summarize efficacy and safety data related to current and emerging kinase inhibitors for the treatment of psoriasis, Treat moderate to severe psoriasis in accordance with current evidence and guidelines, recognizing the role of nonbiologic therapies in addressing the burden of disease and comorbidities in individual patients.
Go online to PeerView.com/NJS860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, an expert in dermatology discusses unmet needs of patients with moderate to severe psoriasis and the clinical potential of targeting the TYK2 pathway as a novel nonbiologic oral therapeutic option. Upon completion of this accredited CE activity, participants should be better able to: Explain the role of the JAK-STAT signaling pathway in the pathophysiology of psoriasis, Summarize efficacy and safety data related to current and emerging kinase inhibitors for the treatment of psoriasis, Treat moderate to severe psoriasis in accordance with current evidence and guidelines, recognizing the role of nonbiologic therapies in addressing the burden of disease and comorbidities in individual patients.
Go online to PeerView.com/NJS860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, an expert in dermatology discusses unmet needs of patients with moderate to severe psoriasis and the clinical potential of targeting the TYK2 pathway as a novel nonbiologic oral therapeutic option. Upon completion of this accredited CE activity, participants should be better able to: Explain the role of the JAK-STAT signaling pathway in the pathophysiology of psoriasis, Summarize efficacy and safety data related to current and emerging kinase inhibitors for the treatment of psoriasis, Treat moderate to severe psoriasis in accordance with current evidence and guidelines, recognizing the role of nonbiologic therapies in addressing the burden of disease and comorbidities in individual patients.
Go online to PeerView.com/KCX860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. Over the past decade, the understanding of atopic dermatitis (AD) pathogenesis has evolved, giving way to numerous potential therapeutic targets. During this time, Janus kinase (JAK) inhibitors—a new class of medications—have also emerged. While the JAK-signal transducer and activator of transcription (JAK-STAT) pathway did not seem to be an obvious target early on, JAK inhibitors are likely to be the next generation of agents FDA approved for the treatment of moderate to severe AD. Indeed, JAK inhibitors are demonstrating benefit across multiple dermatologic diseases and constitute a promising frontier for dermatologic therapy overall. In this activity, based on a recent live web broadcast, our expert faculty examine the complex pathogenesis that underlies AD, focusing on the rationale for development of novel therapeutic approaches. In addition, key information (eg, mechanism of action, side-effect profiles, and dosing) for these new and emerging agents for moderate to severe AD will be provided, as well as the most up-to-date efficacy and safety data and practical considerations for clinical use. Upon completion of this accredited CE activity, participants should be better able to: Recognize recent insights into the pathogenesis of atopic dermatitis (AD) that have led to the development of new molecules targeting key cytokine signaling pathways, Evaluate recent safety and efficacy data related to emerging treatment options for moderate to severe AD, identifying potential implications for patient care, Develop strategies to identify candidates for newer therapeutic options and overcome barriers to achieving treatment goals in patients with moderate to severe AD.
Go online to PeerView.com/KCX860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. Over the past decade, the understanding of atopic dermatitis (AD) pathogenesis has evolved, giving way to numerous potential therapeutic targets. During this time, Janus kinase (JAK) inhibitors—a new class of medications—have also emerged. While the JAK-signal transducer and activator of transcription (JAK-STAT) pathway did not seem to be an obvious target early on, JAK inhibitors are likely to be the next generation of agents FDA approved for the treatment of moderate to severe AD. Indeed, JAK inhibitors are demonstrating benefit across multiple dermatologic diseases and constitute a promising frontier for dermatologic therapy overall. In this activity, based on a recent live web broadcast, our expert faculty examine the complex pathogenesis that underlies AD, focusing on the rationale for development of novel therapeutic approaches. In addition, key information (eg, mechanism of action, side-effect profiles, and dosing) for these new and emerging agents for moderate to severe AD will be provided, as well as the most up-to-date efficacy and safety data and practical considerations for clinical use. Upon completion of this accredited CE activity, participants should be better able to: Recognize recent insights into the pathogenesis of atopic dermatitis (AD) that have led to the development of new molecules targeting key cytokine signaling pathways, Evaluate recent safety and efficacy data related to emerging treatment options for moderate to severe AD, identifying potential implications for patient care, Develop strategies to identify candidates for newer therapeutic options and overcome barriers to achieving treatment goals in patients with moderate to severe AD.
PeerView Family Medicine & General Practice CME/CNE/CPE Video Podcast
Go online to PeerView.com/KCX860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. Over the past decade, the understanding of atopic dermatitis (AD) pathogenesis has evolved, giving way to numerous potential therapeutic targets. During this time, Janus kinase (JAK) inhibitors—a new class of medications—have also emerged. While the JAK-signal transducer and activator of transcription (JAK-STAT) pathway did not seem to be an obvious target early on, JAK inhibitors are likely to be the next generation of agents FDA approved for the treatment of moderate to severe AD. Indeed, JAK inhibitors are demonstrating benefit across multiple dermatologic diseases and constitute a promising frontier for dermatologic therapy overall. In this activity, based on a recent live web broadcast, our expert faculty examine the complex pathogenesis that underlies AD, focusing on the rationale for development of novel therapeutic approaches. In addition, key information (eg, mechanism of action, side-effect profiles, and dosing) for these new and emerging agents for moderate to severe AD will be provided, as well as the most up-to-date efficacy and safety data and practical considerations for clinical use. Upon completion of this accredited CE activity, participants should be better able to: Recognize recent insights into the pathogenesis of atopic dermatitis (AD) that have led to the development of new molecules targeting key cytokine signaling pathways, Evaluate recent safety and efficacy data related to emerging treatment options for moderate to severe AD, identifying potential implications for patient care, Develop strategies to identify candidates for newer therapeutic options and overcome barriers to achieving treatment goals in patients with moderate to severe AD.
PeerView Family Medicine & General Practice CME/CNE/CPE Audio Podcast
Go online to PeerView.com/KCX860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. Over the past decade, the understanding of atopic dermatitis (AD) pathogenesis has evolved, giving way to numerous potential therapeutic targets. During this time, Janus kinase (JAK) inhibitors—a new class of medications—have also emerged. While the JAK-signal transducer and activator of transcription (JAK-STAT) pathway did not seem to be an obvious target early on, JAK inhibitors are likely to be the next generation of agents FDA approved for the treatment of moderate to severe AD. Indeed, JAK inhibitors are demonstrating benefit across multiple dermatologic diseases and constitute a promising frontier for dermatologic therapy overall. In this activity, based on a recent live web broadcast, our expert faculty examine the complex pathogenesis that underlies AD, focusing on the rationale for development of novel therapeutic approaches. In addition, key information (eg, mechanism of action, side-effect profiles, and dosing) for these new and emerging agents for moderate to severe AD will be provided, as well as the most up-to-date efficacy and safety data and practical considerations for clinical use. Upon completion of this accredited CE activity, participants should be better able to: Recognize recent insights into the pathogenesis of atopic dermatitis (AD) that have led to the development of new molecules targeting key cytokine signaling pathways, Evaluate recent safety and efficacy data related to emerging treatment options for moderate to severe AD, identifying potential implications for patient care, Develop strategies to identify candidates for newer therapeutic options and overcome barriers to achieving treatment goals in patients with moderate to severe AD.
Go online to PeerView.com/KCX860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. Over the past decade, the understanding of atopic dermatitis (AD) pathogenesis has evolved, giving way to numerous potential therapeutic targets. During this time, Janus kinase (JAK) inhibitors—a new class of medications—have also emerged. While the JAK-signal transducer and activator of transcription (JAK-STAT) pathway did not seem to be an obvious target early on, JAK inhibitors are likely to be the next generation of agents FDA approved for the treatment of moderate to severe AD. Indeed, JAK inhibitors are demonstrating benefit across multiple dermatologic diseases and constitute a promising frontier for dermatologic therapy overall. In this activity, based on a recent live web broadcast, our expert faculty examine the complex pathogenesis that underlies AD, focusing on the rationale for development of novel therapeutic approaches. In addition, key information (eg, mechanism of action, side-effect profiles, and dosing) for these new and emerging agents for moderate to severe AD will be provided, as well as the most up-to-date efficacy and safety data and practical considerations for clinical use. Upon completion of this accredited CE activity, participants should be better able to: Recognize recent insights into the pathogenesis of atopic dermatitis (AD) that have led to the development of new molecules targeting key cytokine signaling pathways, Evaluate recent safety and efficacy data related to emerging treatment options for moderate to severe AD, identifying potential implications for patient care, Develop strategies to identify candidates for newer therapeutic options and overcome barriers to achieving treatment goals in patients with moderate to severe AD.
Go online to PeerView.com/KCX860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. Over the past decade, the understanding of atopic dermatitis (AD) pathogenesis has evolved, giving way to numerous potential therapeutic targets. During this time, Janus kinase (JAK) inhibitors—a new class of medications—have also emerged. While the JAK-signal transducer and activator of transcription (JAK-STAT) pathway did not seem to be an obvious target early on, JAK inhibitors are likely to be the next generation of agents FDA approved for the treatment of moderate to severe AD. Indeed, JAK inhibitors are demonstrating benefit across multiple dermatologic diseases and constitute a promising frontier for dermatologic therapy overall. In this activity, based on a recent live web broadcast, our expert faculty examine the complex pathogenesis that underlies AD, focusing on the rationale for development of novel therapeutic approaches. In addition, key information (eg, mechanism of action, side-effect profiles, and dosing) for these new and emerging agents for moderate to severe AD will be provided, as well as the most up-to-date efficacy and safety data and practical considerations for clinical use. Upon completion of this accredited CE activity, participants should be better able to: Recognize recent insights into the pathogenesis of atopic dermatitis (AD) that have led to the development of new molecules targeting key cytokine signaling pathways, Evaluate recent safety and efficacy data related to emerging treatment options for moderate to severe AD, identifying potential implications for patient care, Develop strategies to identify candidates for newer therapeutic options and overcome barriers to achieving treatment goals in patients with moderate to severe AD.
Aging and chronic stress can obtain activation of CNS-resident microglia and astrocytes, that produce type 1 interferons (T1 IFNs) which signal through the heterodimeric IFN-α/β receptor (IFNAR) where receptor binding of T1 IFNs activates the JAK/STAT thus inducing IFN-stimulated genes (ISGs) which mediate both pro- and anti-inflammatory functions depending upon the cellular micro-environment. Now consider how aging is linked to elevated & activated leukocyte counts and it becomes clear that this is a patho-biochemical phenocopy to T cell acute lymphoblastc leukaemia (T-ALL) where signaling through Notch, Jak/Stat, PI3K/Akt/mTOR, and MAPK are shared. IL7-induced glucocorticoid resistance is diagnostic of certain subtypes of T-ALL and this is also associated with the senescence associated secretory phenotype of aging-linked morbidity and mortality. Finally, consider that chronic CNS stress leads to increased glucocorticoid production leading to a suppression of cell adhesion protein thus corrupting synaptic plasticity, memory re-formation, and cognitive acuity while promoting sarcopenia by stimulating proteasomal removal of contractile proteins and inhibiting the PI3-kinase/Akt pathway. Glucocorticoids also prevent IL-2 synthesis and secretion thus causing immune suppression by blocking T cell activation. J Neuroinflammation. 2019; 16: 236. Cytokine & Growth Factor Reviews, 22 Apr 2017, 35:85-96 --- Support this podcast: https://anchor.fm/dr-daniel-j-guerra/support
Episode 347 is an updated guide to somatropic hormone and GOD did I go crazy on this one! I honestly want to know more about growth hormone than anyone alive and thus, begins this string of GH based guides! I DID finally discuss the MoA for how GH causes localized fat loss which really had me excited since no one in our industry has EVER talked about this so that definitely was an interesting avenue to go down! Below I am going to reference a lot of the literature for this hormone that I was read through over the past few years on this topic so please DO NOT TAKE MY WORD FOR THIS - READ THESE YOURSELF! Keep in mind this is a brief snippet of every bit of literature on the topic however. REFERENCES Daughaday WH, Rotwein P. Insulin-like growth factors I and II. Peptide, messenger ribonucleic acid and gene structures, serum, and tissue concentrations. Endocr Rev. 1989;10:68–91. [PubMed] [Google Scholar] Jones JI, Clemmons DR. 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CME credits: 0.25 Valid until: 01-10-2021 Claim your CME credit at https://reachmd.com/programs/cme/late-breaking-data-in-moderate-to-severe-atopic-dermatitis/11797/ Statement of NeedRecent investigations into the underlying mechanisms of atopic dermatitis have revealed the importance of the JAK/STAT pathway and downstream cytokines in driving inflammatory response and AD pathogenesis and have informed the recent development of novel targeted agents. The recent and rapid emergence of new data on novel targeted treatments for moderate-to-severe AD creates a knowledge gap for dermatologists and allergists. These clinicians need to be familiar with the characteristics and latest data associated with targeted agents in clinical development for the treatment of moderate-to-severe AD so that they are prepared to rapidly integrate the agents into clinical practice as they become available.
CME credits: 0.25 Valid until: 01-10-2021 Claim your CME credit at https://reachmd.com/programs/cme/moderate-to-severe-atopic-dermatitis-expert-insights-on-late-breaking-data-in-systemic-treatment/11796/ Statment of NeedRecent investigations into the underlying mechanisms of atopic dermatitis have revealed the importance of the JAK/STAT pathway and downstream cytokines in driving inflammatory response and AD pathogenesis and have informed the recent development of novel targeted agents. The recent and rapid emergence of new data on novel targeted treatments for moderate-to-severe AD creates a knowledge gap for dermatologists and allergists. As emerging targeted therapies have the potential to become available relatively quickly, dermatologists and allergists must be familiar with the practical considerations associated with using these agents so that they are prepared to integrate these agents into the management of patients with moderate-to-severe AD in a safe and appropriate manner. This activity will bridge the knowledge gap by providing expert perspective on the translation of these data into clinical practice to optimize patient outcomes.
CME credits: 0.25 Valid until: 01-10-2021 Claim your CME credit at https://reachmd.com/programs/cme/moderate-to-severe-atopic-dermatitis-expert-insights-on-late-breaking-data-in-systemic-treatment/11796/ Statment of NeedRecent investigations into the underlying mechanisms of atopic dermatitis have revealed the importance of the JAK/STAT pathway and downstream cytokines in driving inflammatory response and AD pathogenesis and have informed the recent development of novel targeted agents. The recent and rapid emergence of new data on novel targeted treatments for moderate-to-severe AD creates a knowledge gap for dermatologists and allergists. As emerging targeted therapies have the potential to become available relatively quickly, dermatologists and allergists must be familiar with the practical considerations associated with using these agents so that they are prepared to integrate these agents into the management of patients with moderate-to-severe AD in a safe and appropriate manner. This activity will bridge the knowledge gap by providing expert perspective on the translation of these data into clinical practice to optimize patient outcomes.
CME credits: 0.25 Valid until: 01-10-2021 Claim your CME credit at https://reachmd.com/programs/cme/late-breaking-data-in-moderate-to-severe-atopic-dermatitis/11797/ Statement of NeedRecent investigations into the underlying mechanisms of atopic dermatitis have revealed the importance of the JAK/STAT pathway and downstream cytokines in driving inflammatory response and AD pathogenesis and have informed the recent development of novel targeted agents. The recent and rapid emergence of new data on novel targeted treatments for moderate-to-severe AD creates a knowledge gap for dermatologists and allergists. These clinicians need to be familiar with the characteristics and latest data associated with targeted agents in clinical development for the treatment of moderate-to-severe AD so that they are prepared to rapidly integrate the agents into clinical practice as they become available.
Go online to PeerView.com/ZHN860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, an expert in rheumatic diseases discusses strategies to select and optimize treatment for individual patients with RA and PsA, focusing on the appropriate clinical utilization of newer treatment options (ie, JAK inhibitors). Upon completion of this activity, participants will be able to: Outline advances that have improved the quality of care in rheumatic diseases, Explain the role of the JAK/STAT signaling pathway in the pathophysiology of RA and PsA, Summarize efficacy and safety data related to current JAK inhibitors for the treatment of RA and PsA, Treat RA and PsA in accordance with current evidence and guidelines, recognizing the role of non-anti-TNF therapies in patients with active disease, Incorporate JAK inhibitors into treatment plans for individual patients with RA or PsA, recognizing the importance of achieving therapeutic targets and a patient-centered approach to care.
Go online to PeerView.com/ZHN860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, an expert in rheumatic diseases discusses strategies to select and optimize treatment for individual patients with RA and PsA, focusing on the appropriate clinical utilization of newer treatment options (ie, JAK inhibitors). Upon completion of this activity, participants will be able to: Outline advances that have improved the quality of care in rheumatic diseases, Explain the role of the JAK/STAT signaling pathway in the pathophysiology of RA and PsA, Summarize efficacy and safety data related to current JAK inhibitors for the treatment of RA and PsA, Treat RA and PsA in accordance with current evidence and guidelines, recognizing the role of non-anti-TNF therapies in patients with active disease, Incorporate JAK inhibitors into treatment plans for individual patients with RA or PsA, recognizing the importance of achieving therapeutic targets and a patient-centered approach to care.
Go online to PeerView.com/ZHN860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, an expert in rheumatic diseases discusses strategies to select and optimize treatment for individual patients with RA and PsA, focusing on the appropriate clinical utilization of newer treatment options (ie, JAK inhibitors). Upon completion of this activity, participants will be able to: Outline advances that have improved the quality of care in rheumatic diseases, Explain the role of the JAK/STAT signaling pathway in the pathophysiology of RA and PsA, Summarize efficacy and safety data related to current JAK inhibitors for the treatment of RA and PsA, Treat RA and PsA in accordance with current evidence and guidelines, recognizing the role of non-anti-TNF therapies in patients with active disease, Incorporate JAK inhibitors into treatment plans for individual patients with RA or PsA, recognizing the importance of achieving therapeutic targets and a patient-centered approach to care.
Go online to PeerView.com/ZHN860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, an expert in rheumatic diseases discusses strategies to select and optimize treatment for individual patients with RA and PsA, focusing on the appropriate clinical utilization of newer treatment options (ie, JAK inhibitors). Upon completion of this activity, participants will be able to: Outline advances that have improved the quality of care in rheumatic diseases, Explain the role of the JAK/STAT signaling pathway in the pathophysiology of RA and PsA, Summarize efficacy and safety data related to current JAK inhibitors for the treatment of RA and PsA, Treat RA and PsA in accordance with current evidence and guidelines, recognizing the role of non-anti-TNF therapies in patients with active disease, Incorporate JAK inhibitors into treatment plans for individual patients with RA or PsA, recognizing the importance of achieving therapeutic targets and a patient-centered approach to care.
PeerView Immunology & Transplantation CME/CNE/CPE Audio Podcast
Go online to PeerView.com/ZHN860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, an expert in rheumatic diseases discusses strategies to select and optimize treatment for individual patients with RA and PsA, focusing on the appropriate clinical utilization of newer treatment options (ie, JAK inhibitors). Upon completion of this activity, participants will be able to: Outline advances that have improved the quality of care in rheumatic diseases, Explain the role of the JAK/STAT signaling pathway in the pathophysiology of RA and PsA, Summarize efficacy and safety data related to current JAK inhibitors for the treatment of RA and PsA, Treat RA and PsA in accordance with current evidence and guidelines, recognizing the role of non-anti-TNF therapies in patients with active disease, Incorporate JAK inhibitors into treatment plans for individual patients with RA or PsA, recognizing the importance of achieving therapeutic targets and a patient-centered approach to care.
PeerView Family Medicine & General Practice CME/CNE/CPE Video Podcast
Go online to PeerView.com/ZHN860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, an expert in rheumatic diseases discusses strategies to select and optimize treatment for individual patients with RA and PsA, focusing on the appropriate clinical utilization of newer treatment options (ie, JAK inhibitors). Upon completion of this activity, participants will be able to: Outline advances that have improved the quality of care in rheumatic diseases, Explain the role of the JAK/STAT signaling pathway in the pathophysiology of RA and PsA, Summarize efficacy and safety data related to current JAK inhibitors for the treatment of RA and PsA, Treat RA and PsA in accordance with current evidence and guidelines, recognizing the role of non-anti-TNF therapies in patients with active disease, Incorporate JAK inhibitors into treatment plans for individual patients with RA or PsA, recognizing the importance of achieving therapeutic targets and a patient-centered approach to care.
PeerView Family Medicine & General Practice CME/CNE/CPE Audio Podcast
Go online to PeerView.com/ZHN860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, an expert in rheumatic diseases discusses strategies to select and optimize treatment for individual patients with RA and PsA, focusing on the appropriate clinical utilization of newer treatment options (ie, JAK inhibitors). Upon completion of this activity, participants will be able to: Outline advances that have improved the quality of care in rheumatic diseases, Explain the role of the JAK/STAT signaling pathway in the pathophysiology of RA and PsA, Summarize efficacy and safety data related to current JAK inhibitors for the treatment of RA and PsA, Treat RA and PsA in accordance with current evidence and guidelines, recognizing the role of non-anti-TNF therapies in patients with active disease, Incorporate JAK inhibitors into treatment plans for individual patients with RA or PsA, recognizing the importance of achieving therapeutic targets and a patient-centered approach to care.
PeerView Immunology & Transplantation CME/CNE/CPE Video Podcast
Go online to PeerView.com/ZHN860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. In this activity, an expert in rheumatic diseases discusses strategies to select and optimize treatment for individual patients with RA and PsA, focusing on the appropriate clinical utilization of newer treatment options (ie, JAK inhibitors). Upon completion of this activity, participants will be able to: Outline advances that have improved the quality of care in rheumatic diseases, Explain the role of the JAK/STAT signaling pathway in the pathophysiology of RA and PsA, Summarize efficacy and safety data related to current JAK inhibitors for the treatment of RA and PsA, Treat RA and PsA in accordance with current evidence and guidelines, recognizing the role of non-anti-TNF therapies in patients with active disease, Incorporate JAK inhibitors into treatment plans for individual patients with RA or PsA, recognizing the importance of achieving therapeutic targets and a patient-centered approach to care.
Link to bioRxiv paper: http://biorxiv.org/cgi/content/short/2020.08.04.236299v1?rss=1 Authors: Walker, S. L., Wang, G., Emmerich, K. B., Wang, F., White, D. T., Saxena, M. T., Teng, Y., Qian, J., Mumm, J. S. Abstract: Zebrafish are an effective model organism for retinal regeneration studies. Regenerated retinal cells are derived from Müller glia (MG) stem cells. Mammalian MG can also produce new retinal neurons; however, this regenerative potential remains dormant in the absence of genetic and/or chemical stimulation. An understanding of how the regenerative potential of MG is regulated could aid efforts to promote regeneration therapeutically. Following widespread retinal cell death, developmental signaling coordinates regeneration. Less is known about how MG respond to the loss of specific cell types, i.e., paradigms similar to retinal degenerative diseases. To address this, transcriptomic responses to the selective loss of rod photoreceptors or retinal bipolar cells were compared over twelve timepoints spanning cell degeneration and regeneration. Shared and paradigm-specific expression changes were identified throughout regeneration. Overall, paradigm-specific changes predominated, suggesting cell-specific mechanisms for activating MG stem cells. One particularly interested finding new for retinal regeneration was early regulation of SOCS family genes. These are associated with stat3 activation and the JAK/STAT pathway which has been well documented in similar studies and was further supported in our analyses. These data support the concept that selective retinal cell loss can elicit cell-specific regenerative programs and provide novel insights into retinal regeneration. Copy rights belong to original authors. Visit the link for more info
Link to bioRxiv paper: http://biorxiv.org/cgi/content/short/2020.07.10.197368v1?rss=1 Authors: Martina A. Maibach, Ester Piovesana, Julia Kaiser, Mea M. Holm, Zorica Ristic, Michael Maurer, Martina E. Schwab Abstract: Nogo-A is a well-characterized myelin-associated membrane protein that restricts fibre growth and the regenerative capacity of the adult central nervous system after injury. To date Nogo-A post-receptor signalling pathway research focused on the RhoA/ROCK cascade, which can lead to growth cone collapse and neurite retraction. Much less is known about continued intracellular Nogo-A signalling mediating long-term neurite outgrowth inhibition resulting from transcriptional and translational changes. Here, we propose a simple but highly reproducible in vitro assay to study Nogo-A related signaling and neurite outgrowth inhibition in general. Furthermore, we identified ERK1/2 as downstream effector of Nogo-A, partially mediating its neurite outgrowth inhibition. We describe ERK1/2 dependent changes of translational events such as elevation of RhoA levels within the growth cone, which may potentiate the cells' responses to Nogo-A. We also observed Nogo-A dependent upregulation of the JAK/STAT pathway inhibitors SOCS3 and KLF4 and downregulation of insulin mediated phosphorylation of AKT, indicating direct negative crosstalk between Nogo-A signalling and the growth promoting JAK/STAT and AKT/mTORC1 pathways.Competing Interest StatementThe authors have declared no competing interest. Copy rights belong to original authors. Visit the link for more info
Myeloproliferative Neoplasms Update — Part 2: Our interview with Dr Gerds highlights the following topics and cases from his practice: Common misconceptions about MPNs (0:00) Alterations of the JAK-STAT signaling pathway in MPNs (1:43) Case: A 61-year-old woman with primary MF and mutations in JAK2, EZH2 and CALR receives ruxolitinib (4:29) Prognostic significance of the JAK2, EZH2 and CALR mutations associated with MF (7:20) Dosing and activity of ruxolitinib for MF (8:53) Management of ruxolitinib-associated cytopenias and effect of ruxolitinib on disease pathogenesis (12:19) Evolution of clinical research with the selective JAK2 inhibitor fedratinib for MF (15:32) Association between fedratinib and thiamine levels; cytopenias associated with fedratinib (17:20) Efficacy of fedratinib as second-line treatment for patients with disease progression on ruxolitinib (18:38) Risks and benefits associated with pacritinib therapy (20:00) Case: A 66-year-old man who presents with anemia is diagnosed with MF and a Type 1 CALR mutation (21:48) Risk of infections associated with ruxolitinib (23:12) Evaluation of ruxolitinib for the treatment of graft-versus-host disease (27:05) Activity of the JAK1/2 inhibitor momelotinib in patients with MF (28:23) Hepcidin suppression and improvement of anemia in patients with MF; effect of novel JAK inhibitors, including fedratinib and momelotinib (30:03) Results of the SIMPLIFY 2 study evaluating momelotinib versus best available therapy for patients with MF previously treated with ruxolitinib (32:28) Use of JAK inhibitors for rheumatoid arthritis (35:29) Novel agents and approaches under investigation for MPNs (36:48) Perspective on the potential role of venetoclax for patients with MPNs (40:30) Case: A 75-year-old woman previously diagnosed with ET and a JAK2 V617F mutation is found to have disease transformation to PV on reassessment 12 years later (43:34) Efficacy and side effects of the MDM2 antagonist idasanutlin in the treatment of PV (47:36) Importance of maintaining hematocrit control in patients with PV (50:15) Role of ruxolitinib for patients with PV (51:55) Case: A 45-year-old woman with persistent headaches is diagnosed with ET and a JAK2 V617F mutation (54:08) Therapeutic options for patients with ET (56:47) Perspective on the need for aspirin for ET (59:17) Role of interferon and PI3-kinase inhibitors in the treatment of MPNs (1:00:37) Select publications
Myeloproliferative Neoplasms Update — Part 1: Our interview with Dr Mesa highlights the following topics and cases from his practice: Molecular pathogenesis of myeloproliferative neoplasms (MPNs) (00:00) Cytokine activation and its association with the distinct symptomatology of MPNs (3:42) Targeting the JAK-STAT pathway in myelofibrosis (MF) and polycythemia vera (PV) (5:19) Case:A 66-year-old man with symptomatic primary MF with a CALR mutation receives ruxolitinib (9:05) Clinical parameters to evaluate when considering treatment with ruxolitinib (11:23) Discussing the complexities of allogeneic transplant with patients considering this intervention (16:05) Clinical outcomes and complication rates for younger versus older patients undergoing transplant (16:46) Counseling patients regarding the efficacy and side-effect profile of ruxolitinib (20:41) Symptom improvement with ruxolitinib; dosing for patients with MF (24:14) Management of anemia associated with ruxolitinib treatment (26:27) Approach to dosing ruxolitinib for patients with MF and cytopenias (29:58) Consideration of ruxolitinib treatment holidays and therapy reinitiation for patients with increased splenomegaly (32:22) Treatment options for patients with MF and disease progression on ruxolitinib (36:20) Clonal evolution and outcomes in MF after ruxolitinib discontinuation (38:53) Therapeutic options for patients who experience disease progression on ruxolitinib (41:06) Activity, tolerability and ongoing investigation of novel JAK inhibitors pacritinib, momelotinib and fedratinib in MF (44:36) FDA clinical hold on fedratinib due to possible occurrences of Wernicke encephalopathy in patients on the JAKARTA-1 trial and recent lift of the hold (47:46) Ongoing investigation of fedratinib in MF (48:56) Clinical experience with pacritinib, momelotinib and fedratinib (52:46) Toward identifying molecular predictors of response to pacritinib, momelotinib and fedratinib (53:59) Case: A 64-year-old woman with ruxolitinib-refractory MF receives fedratinib on the Phase II JAKARTA-2 trial (55:51) Therapeutic approach to MF that progresses to acute myeloid leukemia (59:26) Investigation of the novel Bcl-2 inhibitor navitoclax in combination with ruxolitinib for patients with MF (1:2:42) Clinical manifestations and treatment of PV (1:3:12) Case: A 56-year-old woman with high-risk PV and an inadequate response to hydroxyurea receives ruxolitinib (1:5:53) Risk stratification and treatment for patients with essential thrombocythemia (ET) (1:8:26) Select publications
John J. O’Shea, MD, is scientific director of the NIH’s National Institute of Arthritis and Musculoskeletal and Skin Diseases, and chief of their Molecular Immunology and Inflammation Branch. In this ACR interview, he joins me to talk about the JAK/STAT pathway, what we’ve learned from mouse models, current FDA-approved JAK inhibitors and the future of this exciting field. Intro :10 Background on Dr. O’Shea :45 The interview 2:37 How did you start looking into the JAK/STAT pathway? 3:16 What should a clinician understand about this pathway? 5:22 What do these cytokines have in common? 6:37 What have we learned from mouse models? 8:48 GWAS studies in JAK/STAT 11:49 Can we quantify how much a certain cytokine may be using this pathway? 12:39 Can you explain suppressor of cytokine signaling, aka SOCS? 14:15 What do we know about how these different cytokines can have individual signaling controls? 16:40 An explanation of phenocopy 18:01 What evidence do we have that JAK may circumvent STAT, and vice versa? 18:41 An overview of FDA-approved JAK inhibitors and the pipeline 20:52 What excites you the most about the future of this field? 23:26 In a state of wonder over success of biologics 25:50 Thank you, Dr. O’Shea 27:20 Recap 27:30 We’d love to hear from you! Send your comments/questions to rheuminationspodcast@healio.com. And be sure to follow us on Twitter @AdamJBrownMD and @HealioRheum. This information is brought to you by Healio and is not sponsored by, nor a part of, the American College of Rheumatology.
Growth hormone and Jak-Stat signaling pathway
Dr Carolyn Lam: Welcome to Circulation on the Run, your weekly podcast summary and backstage pass to the journal and its editors. I'm Dr. Carolyn Lam, associate editor from the National Heart Center of Singapore and Duke National University of Singapore. Our featured discussion today is a wake-up call because despite substantial efforts to promote cardiac rehabilitation in guidelines and performance measures only a small percentage of patients are receiving this and there is a remarkable regional variation. Lots of lessons to be learned here coming right up after these summaries. More children with congenital heart disease are surviving into adulthood, and congenital heart disease is associated with risk factors for dementia. But what is the actual risk of dementia in congenital heart disease adults? Well, in this first paper from first and corresponding author Dr. Bagge from Aarhus University Hospital in Denmark, the authors used medical registries and a medical record review of all Danish hospitals to identify more than 10,600 adults with congenital heart disease diagnosed between 1963 and 2012 and followed up until the hospital diagnosis of dementia or death, emigration, or the end of the study in the end of December 2012. For each individual with congenital heart disease the authors identified 10 members of the Danish general population matched on sex and birth year. They found that the risk of all-cause dementia was increased by about 60% in congenital heart disease adults compared with the matched general population. The risk was higher for early onset dementia, that is dementia at less than 65 years of age, in which the risk was more than double. The risk was also elevated for all levels of congenital heart disease complexity, including those with cyanotic potential. The relative risk remained increased for those without extra cardiac defect or acquired cardiovascular diseases. These results really underscore the importance of understanding the risk of adverse long-term neurologic outcomes in the growing and aging population with congenital heart diseases. The next paper suggests that patient outcomes after lower limb revascularization have improved in England over recent times. This paper from first and corresponding author Dr. Heikkila from London School of Hygiene and Tropical Medicine used individual patient records from hospital episode statistics to identify almost 104,000 patients who underwent endovascular or surgical lower limb revascularization for infrainguinal peripheral artery disease in England between 2006 and 2015. During this 10-year period the estimated one-year risks of major amputation and death reduced after both endovascular and surgical lower limb revascularization in England. These trends were observed for all categories of peripheral artery disease severity, with the largest reductions seen among patients with the most severe underlying disease. These encouraging trends coincided with a period of centralization and specialization of vascular services in England, although the current findings cannot be interpreted as resulting directly from this reconfiguration of services. The next paper presents experimental data showing that targeting the Janus kinase and signal transducer and activator of transcription or JAK-STAT pathway may represent a disease-modifying strategy in inflammatory vasculopathy. First author Dr. Zhang, corresponding author Dr. Weyand from Stanford University School of Medicine examined whether persistent vessel wall inflammation in giant-cell arthritis is maintained by lesional T cells and whether such T cells are sensitive to the cytokine signaling inhibitor tofacitinib, which is a JAK inhibitor that targets JAK3 and JAK1. To do this, vascular inflammation was induced in human arteries and grafted into immunodeficient mice that were reconstituted with T cells and monocytes from patients with giant-cell arthritis. Mice carrying inflamed human arteries were then treated with tofacitinib or vehicle. They found that tofacitinib suppressed T cell invasion into the artery, inhibited proliferation and cytokine production of vasculitogenic T cells and curbed survival of artery resident T cells. Tofacitinib treatment prevented neoangiogenesis and intimal hyperplasia in these inflamed arteries. Thus, inhibition of JAK-STAT signaling with tofacitinib effectively targeted multiple disease-relevant processes in inflammatory vasculopathy and thus represents a potential disease-modifying agent. The next paper provides important insights into how coronary artery calcification burden and cardiorespiratory fitness, which are actually two independent predictors of cardiovascular disease but may interact with each other to impact cardiovascular risk. First author Dr. Radford, corresponding author Dr. Levine from the Institute of Exercise and Environmental Medicine Texas Health Presbyterian Hospital and UT Southwestern Medical Center studied 8,425 men without clinical cardiovascular disease who underwent preventive medical examinations that included an objective measurement of coronary artery calcification and cardiorespiratory fitness between 1998 and 2007. They found that cardiovascular disease events increased with increasing coronary artery calcification and decreased with increasing cardiorespiratory fitness. Adjusting for coronary artery calcification levels for each additional MET of fitness there was an 11% lower risk of cardiovascular disease events. When both coronary artery calcification and cardiorespiratory fitness were considered together there was a strong association between continuous cardiorespiratory fitness and cardiovascular disease incident rates in all coronary artery calcium groups. Thus, the take-home message is for any baseline age and level of coronary artery calcification greater fitness is associated in a continuous fashion with lower risks of cardiovascular disease events. And that wraps up our summaries. Now for our feature discussion. We all know how cardiac rehabilitation is. It's strongly advocated in guidelines, it's very well highlighted in performance measures. But how well are we actually doing? Well, today's feature paper really gives us some very valuable information and really kind of holds a mirror in our face, doesn't it? I'm so pleased to have with us the first and corresponding author of the paper Dr. Alexis Beatty from VA Puget Sound Health Care System and University of Washington as well as Jarett Berry, our associate editor from UT Southwestern. Alexis, could you tell us what did you see when you looked at cardiac rehabilitation among the Medicare and VA populations? Dr Alexis Beatty: Overall participation in cardiac rehab after an MI or a PCI or a bypass surgery is pretty low, only about 16% of people in Medicare and about 10% of people on the VA actually participate in cardiac rehab. But the interesting thing is that we saw pretty wide variations from state to state in participation. So some states had pretty high participation, upwards of 40% of patients, and some states had only 1, 2, 3% of people participating. Dr Carolyn Lam: Were there any patterns to this, any factors that you teased apart? Dr Alexis Beatty: We did observe that some regions of the country appeared to be doing better than others. So for instance, the West North Central region of the United States, Nebraska, South Dakota area has high participation in both populations and other regions like the Pacific, California, Oregon, Washington, Hawaii, Alaska, have lower participation in both populations. Dr Carolyn Lam: And any postulations on why this may be the case? Dr Alexis Beatty: Yeah, I have some theories. We did try to look at whether it was due to patient characteristics, hospital characteristics, socioeconomic status, and it doesn't really seem to be any of those things that are driving the differences, which leads me to believe that it's actual practice variations. So I think that literally the systems are set up better in some areas of the country than others to get patients into cardiac rehab. Dr Carolyn Lam: And as you beautifully wrote in your paper, that means that there may be an opportunity here to identify best practices here, isn't it? Jarett, you've been thinking about this a lot. What do you think? Dr Jarett Berry: Yeah, I was curious, Alexis, it is interesting that the hospital variation that you saw, the on-site cardiac rehab was fairly consistent across cardiac rehab participation rates in Medicare but there was quite a bit of variability in the access to an on-site cardiac rehab site in the VA patients. I thought that was an interesting observation because it does suggest perhaps that what's driving regional variability looks to be fairly complex as you point out in your paper. But I just wanted to have you speculate a little bit or think a little bit about strategies for how we might think about improving cardiac rehab participation given the fact that there doesn't seem to be one particular answer to this problem. And so as you think about this longstanding challenge, how would you think about the future, about how we could actually really move the needle in increasing cardiac rehab participation? Dr Alexis Beatty: There's a lot of different ways that I think that we can work to start moving the needle. And as you point out, not every VA location has a cardiac rehab center on-site and sites that do have cardiac rehab on-site do tend to do better at getting their patients into cardiac rehab. And I think it may just be that there are people there who are interested in cardiac rehab and are promoting it to patients. And then there probably are some access issues as well. But I think it's not just kind of an "if you build it they will come" sort of proposition. Having cardiac rehab centers is important but then having systems in place to get people into cardiac rehab and get people going to cardiac rehab are just as important. And so I've talked to a lot of the VAs that have centers, don't have centers, do a good job of getting people in, don't do a good job of getting people in. And even in these places that don't have cardiac rehab on-site, if they have a system in place that helps get patients into cardiac rehab they're still able to achieve pretty high rates. And so a lot of that is just doing kind of setting it up as an automatic order and having a nurse or exercise physiologist or somebody be a navigator for the patients through the process. And then the other thing I really want to stress is the importance of providers recommending it to patients. I think that's the strength with which the providers sell cardiac rehab can really make a big difference. Dr Jarett Berry: It's interesting, I just took over cardiac rehab as a medical director here at Southwestern about a year and a half ago and I've been struggling with this. And one of the interesting things that I just would love to get your thoughts on that I noted, which doesn't seem to get a lot of attention in the literature to me, is the role of co-payments. I don't know if most physicians who aren't involved in this space appreciate that for most insurance and for Medicare, it may not be the case for VA, I can't speak to that, but the co-payment amount for each time you come, for each visit is between $30 and $50 per visit. That seems to me in some ways ... I know you didn't address it at all in your paper, but just keeping this conversational ... What do you think the role of some of these other less discussed factors are such as just co-payment amounts that might actually be having a bigger effect on participation? Because I know if I had to pay a 1,000 bucks to go to cardiac rehab I might think twice about it. Dr Alexis Beatty: Yeah, and I think the co-payment issue is a very real issue too and there's a lot of policy level things that makes cardiac rehab difficult. So one is this co-pay issue, there also then other changes to the way it's administered like where the location of the cardiac rehab can be and how hospitals get reimbursed for that. It has to be prescribed by a physician, it can't be prescribed by a nurse practitioner or a PA, it has to be supervised by a physician. There's a lot of restrictions on cardiac rehab that can just, practically speaking, make it difficult to deliver both from the patient and the provider and health system level. And what I tell my patients when I am trying to get them to go to cardiac rehab, and we do have co-payers in the VA too that are kind of on a sliding scale depending on patients' means. And so I tell them that it's an investment. You are making this upfront investment of your time and money and effort to get yourself healthy and learn how to be healthy in the long term. So we know that people who attend cardiac rehab are less likely to be hospitalized and are less likely to die from their heart disease, and so it's an important investment to make and that's sometimes the hard message to sell and I wish it were easier to sell. Dr Jarett Berry: I totally agree with you. My own patients and also the patients that I helped manage through cardiac rehab have received such benefit in many different areas from the participation. But yeah, it is an investment. I wanted to ask another question, if I may Carolyn, about the future. And you alluded to this in your paper, I know your work with Mary Whooley, you guys have done great work thinking about rolling out home-based cardiac rehab. And I think personally that the future of cardiac rehab for most patients, that we're really going to move the needle—I mean some of the policy issues are really important—but can you comment on just telling us what home-based cardiac rehab is and to what extent you think that is a potential solution to deal with these persistently low participation rates? Dr Carolyn Lam: Actually Jarett, if I may just butt in before Alexis answers, I was about to ask that because I was just placing myself in the patient's point of view. And I mean even me, I hate going to gyms now and much rather work with a home app instructing me what to do and I can just do it here, you know what I mean? So I think that's a great question. Alexis? Dr Alexis Beatty: I agree, the future is home cardiac rehab and using all the tools that we have at our disposal to make it easy to deliver home cardiac rehab. The evidence isn't quite as strong for home cardiac rehab but the existing evidence does suggest that it's equally effective to center-based cardiac rehab, it's just not reimbursed in the United States. So functionally it only exists in sort of integrated health systems like the VA. The VA, for instance, has started delivering home-based cardiac rehab programs. I think it's now at over 30 centers in the US. And this has basically started in the last five years. And the programs are pretty similar to a center-based cardiac rehab program in that patients come in and they get an in-depth assessment from cardiac rehab professionals. But then the difference is that they go and exercise on their own at home and they check in with the cardiac rehab professionals usually on a weekly basis over the telephone. And so it ends up being more of like a coaching relationship between the cardiac rehab professionals and the patients who are exercising on their own at home. And a lot of patients really like it because, as you pointed out, it's much more convenient for them, they don't like going to a gym, they'd rather be walking around in their neighborhood or going to their local community pool to swim. So it just sort of addressed a lot of these patient issues and they don't have to pay a co-payment. So it can take some of these other barriers that are there. Dr Jarett Berry: Like a Peloton bike for cardiac rehab, right? Dr Alexis Beatty: Yeah. I mean you could even do that. For instance, in HF-ACTION they actually gave people exercise equipment for a HF-ACTION study for the home segment of the HF-ACTION study. So there certainly are models whereby we could just be giving exercise equipment. And in the VA I can mail people these little exercise paddlers that they can put on their floor or their table and you can use them with your legs or your arms. So certainly being able to send some of this exercise equipment to your patients may help them get them into doing things. But I think home cardiac rehab is the future. And then also I do work on using technology to help deliver home cardiac rehab and I view technology for this space not as the solution but as a tool to help you deliver home cardiac rehab. And now that technology is so ubiquitous, I think that we need to now learn how to use the technology to help us better deliver cardiac rehab in a way that meets the patients' needs. Dr Carolyn Lam: Wow. Jarett, I've actually got a question for you. You were just saying that you run the rehab unit there, so what messages did you take home from this paper? Dr Jarett Berry: What I took home from this was exactly what we've been discussing, this issue of low uptake of cardiac rehab even in the scenario where you have a model where you're delivering this through Medicare or the VA we still see very low participation, albeit there is some variability. And so my interpretation after doing cardiac rehab here at Southwestern for the last year and half is exactly what Alexis is saying, is that we need to be really thinking more creatively about how we can deliver cardiac rehab where the patients are and not requiring them to participate in centers of cardiac rehab that are maybe 30, 40 miles from their home and in the middle of the workday, all of which just really makes such a model inefficient. So I just think what this paper does really solidify is that we really need to be thinking broadly and creatively about how to bring cardiac rehab to more patients because the way we're doing this now I think unfortunately is just ineffective. Dr Carolyn Lam: Anything to add, Alexis? This is great. Dr Alexis Beatty: So one other point that I would like to mention. I think about 10 years ago there was another paper that used a very similar method, and we based a lot of our methods off of that paper by Suaya about 10 years ago. And they found that the rate of participation in cardiac rehab was somewhere very close to ours, I think it was 18% and we observed 16%. And since that paper was published cardiac rehab got included in guidelines, included as a performance measure, and there has been a big push and a lot of attention to try to get people into cardiac rehab and we have moved the needle zero since that time. So I think clearly something new is needed to move the needle for cardiac rehab just as Jarett was pointing out. So we got to do something because what we're doing isn't working. Dr Carolyn Lam: That's a great call and thank you for showing that to us so clearly in your paper. Dr Jarett Berry: Yeah, thanks Alexis and thanks for being so responsive in the revision process, it was a real pleasure to work with you all on this really important paper. Dr Alexis Beatty: Thank you so much for publishing this paper. I feel I've been working on this for like five years. Dr Carolyn Lam: Well you heard it here, listeners. Thank you for joining us today. Don't forget to tune in again next week.
Prof Cools speaks with ecancer about the molecular pathways through which early T precursor ALL may be treated. He describes the origin of ETP-ALL and cell surface markers which characterise its near-stemness, and introduces mutations which drive tumourigenesis. These include JAK-STAT, IL7 and BCL2 pathways, and Prof Cools introduces XPO1, an organelle shuttling protein, which may also be a useful target for treating HIV.
Dr Sonnenblick speaks with ecancer at IMPAKT 2017 about the role of transcription factors in the JAK-STAT pathway, and the role of pSTAT-3 in breast cancer. He outlines the clinical background of STAT-3, with mixed reporting on tumour suppression and oncogenesis, and describes its validation with improved luminal breast cancer outcomes through pooled analysis and proteomic evaluation. Dr Sonnenblick sums up the role of pSTAT-3 as associated with an improved outcome, and urges consideration of this any further STAT inhibitory treatments.
Dr de Bock talks to ecancertv at EHA 2016 about the role of a conserved gene cluster called HOXA, and it's co-operative role in driving T-cell acute lymphoblastic leukaemia. He describes how HOXA mutations, especially HOXA9, are often concurrent with mutations in the cell cycle regulatory JAK pathway, and that the two of them together are strong drivers of oncogenesis. Dr de Bock also discusses how these pathways might be identified and regulated, giving example of the resequencing in patients that determined this genotype.
Dr Perrotti talks to ecancertv at EHA 2016 about micro RNAs (miR) which influence cell cycle progression of haematopoietic stem cells, and their role in modulating chronic myeloid leukaemia (CML). The JAK-STAT pathway is one of the most well known in regulating the cell cycle and growth, and Dr Perrotti discusses how miR-300 induction of activity can promote or silence leukaemia development.
Dr Ross Levine presented results from a study on targeting the JAK-STAT pathway in myeloproliferative neoplasms at the EHA 2013. Myeloproliferative neoplasms (MPN) are clonal blood disorders characterised by excessive production of mature blood cells. The identification of somatic mutations in JAK2, MPL and LNK in the majority of MPN patients led to the development of JAK kinase inhibitors. JAK1/2 inhibitors improve splenomegaly and systemic symptoms, however the mechanism by which this occurs in patients has not been elucidated.
In this month's Cell Podcast, we learn how plant defenses have shaped the fussy dining habits of insects, with Anurag Agrawal (0:00) (Trends in Plant Science Special Issue), why after twenty years, John O’Shea is still excited about cytokine signaling, (8:34) (Immunity Special Feature on the JAK-STAT pathway), and why being the right size is a matter of life or death for free-falling rodents, with Andrew Spence (15:15) (Current Biology Special Issue on Size Control). Plus, sample a selection of the hottest new papers from Cell Press (20:46).
Connective tissue growth factor (CTGF/CCN2) is an angiogenetic and profibrotic factor, acting downstream of TGF-β, involved in both airway- and vascular remodeling. While the T-helper 1 (Th1) cytokine interferon-gamma (IFN-γ) is well characterized as immune-modulatory and anti-fibrotic cytokine, the role of IFN-γ in lung endothelial cells (LEC) is less defined. Tumour necrosis factor alpha (TNF-α) is another mediator that drives vascular remodeling in inflammation by influencing CTGF expression. In the present study we investigated the influence of IFN-γ and TNF-α on CTGF expression in human LEC (HPMEC-ST1.6R) and the effect of CTGF knock down on human LEC. IFN-γ and TNF-α down-regulated CTGF in human LEC at the promoter-, transcriptional- and translational-level in a dose- and time-dependent manner. The inhibitory effect of IFN-γ on CTGF-expression could be almost completely compensated by the Jak inhibitor AG-490, showing the involvement of the Jak-Stat signaling pathway. Besides the inhibitory effect of IFN-γ and TNF-α alone on CTGF expression and LEC proliferation, these cytokines had an additive inhibitory effect on proliferation as well as on CTGF expression when administered together. To study the functional role of CTGF in LEC, endogenous CTGF expression was down-regulated by a lentiviral system. CTGF silencing in LEC by transduction of CTGF shRNA reduced cell proliferation, but did not influence the anti-proliferative effect of IFN-γ and TNF-α. In conclusion, our data demonstrated that CTGF was negatively regulated by IFN-γ in LEC in a Jak/Stat signaling pathway-dependent manner. In addition, an additive effect of IFN-γ and TNF-α on inhibition of CTGF expression and cell proliferation could be found. The inverse correlation between IFN-γ and CTGF expression in LEC could mean that screwing the Th2 response to a Th1 response with an additional IFN-γ production might be beneficial to avoid airway remodeling in asthma.
Fakultät für Biologie - Digitale Hochschulschriften der LMU - Teil 02/06
Interferons are the key cytokines of innate immunity and represent the first line of defense against invading viruses. By activating immediate antiviral mechanisms and stimulating the adaptive immune response, interferon signaling is decisive for the outcome of disease and virus clearance. The work presented in this thesis reveals a central role of the phosphoprotein P of rabies virus (Rhabdoviridae family), known as a polymerase cofactor, as an inhibitor of the host interferon system. Counter-mechanism to escape form recognition by the immune system were previously unknown for the neurotropic rabies virus, which is characterized by the highest case-fatality ratio. In my work I have shown that rabies virus (strain SAD L16) is able to prevent both the production IFN-alpha/beta and the effector functions of IFN-alpha/beta and IFN-gamma. The factor responsible is the viral phosphoprotein P. P interferes with transcriptional activation of IFN-alpha/beta by preventing phosphorylation of the essential transcription factors IRF3 and IRF7 by their kinases TBK1 and IKKepsilon. Unphosphorylated IRFs are unable to dimerize and fail to enter the nucleus. In addition, rabies virus P prevents IFN-mediated JAK/STAT signaling and the expression of IFN-stimulated genes which include a broad spectrum of antiviral and immune regulatory genes. The inhibition of JAK/STAT signaling by P involves a unique mechanism, namely, specific binding of the tyrosine-phosphorylated STAT1 and STAT2 isoforms and their retention in the cytoplasm. The inhibitory activities of RV P on IFN induction and signaling are independent functions, as shown by site-directed mutagenesis of P and identification of different short amino acid stretches required for either function. Importantly, the inhibitory activities of P were demonstrated in the context of recombinant viruses. Using reverse genetics, a rabies virus was constructed, in which P expression was “knocked down” by moving the P gene to a promoter-distal position of the genome (SAD deltaPLP). This virus caused efficient IFN-alpha/beta production in infected cells and upregulation of interferon stimulated genes. The IFN sensitivity of SAD deltaPLP was confirmed in cell culture and is now being studied in animal experiments including IFN receptor knock of mice, to verify the relevance of P functions in vivo. The described work contributes to the understanding of host responses to virus infections in general and of rabies virus pathogenicity in particular. In addition, viruses with modified IFN antagonists provide interesting opportunities for development of attenuated vaccines and vectors.
Medizinische Fakultät - Digitale Hochschulschriften der LMU - Teil 05/19
Die akute Pankreatitis beginnt in den Azinuszellen, allerdings bestimmen die sich anschließenden außerazinären, immunologischen Geschehnisse den Schweregrad der Erkrankung. Diese immunologische Reaktion wird über Zytokine vermittelt, die hauptsächlich von Immunzellen, zusätzlich aber auch von Pankreasazinuszellen selbst sezerniert werden. In dieser Arbeit wurde untersucht, ob Pankreasazinuszellen in der Lage sind, auf autokrin oder parakrin freigesetzte Zytokine zu reagieren. Der JAK/STAT-Signaltransduktionsweg, eine Phosphorylierungskaskade, die von Oberflächenrezeptoren initiierte Signale in den Zellkern weiterleitet, stellt den Haupteffektor der meisten Zytokine dar. Wir konnten mittels Immunopräzipitation und Western-Blot die meisten JAK und STAT Proteine in Pankreasazinuszellen nachweisen (JAK1, JAK2 und TYK2 sowie STAT1, STAT2, STAT3, STAT5 und STAT6). Darüber hinaus konnten wir zeigen, dass einige dieser Proteine in Pankreasazinustellen durch physiologische (Zytokine), aber auch unphysiologische (Stress) Stimuli phosphoryliert und damit aktiviert werden. Dies belegt neben der Expression zusätzlich eine Regulation dieser Proteine und damit eine funktionelle Rolle des JAK/STATSignaltransduktionsweges im Pankreas. Exemplarisch wurde mitttels Immunhistochemie gezeigt, dass IFN-