Podcasts about cdh1

Certaines annonces bouleversent une vie entière.À seulement 24 ans, Léa apprend qu'elle est porteuse d'une mutation génétique CDH1, une anomalie héréditaire qui augmente fortement le risque de développer certains cancers, notamment un cancer diffus de l'estomac et un cancer du sein lobulaire.Du jour au lendemain, son avenir bascule.Sans être malade, elle doit pourtant prendre des décisions que personne ne devrait avoir à envisager si jeune : subir une double mastectomie préventive, puis vivre un jour sans estomac afin de réduire le risque de cancer.Dans cet épisode d'États Dames, Léa livre un témoignage d'une grande sincérité sur les conséquences invisibles d'une mutation génétique héréditaire.Elle raconte le choc de l'annonce, le deuil de son corps, la peur de l'avenir, la médicalisation permanente de son quotidien, l'impact sur sa santé mentale, le recours aux antidépresseurs, les interrogations autour de la maternité, le regard des autres et la difficulté d'expliquer que la prévention peut être aussi éprouvante qu'une maladie.Elle partage également son engagement auprès de Geneticancer, afin d'informer, sensibiliser et accompagner les personnes concernées par les prédispositions génétiques aux cancers.Un épisode profondément humain qui rappelle que vivre avec une mutation génétique, c'est parfois apprendre à faire le deuil d'une vie imaginée pour pouvoir continuer à construire celle qui est encore possible.Dans cet épisode, nous abordons notamment :• la mutation génétique CDH1• les prédispositions héréditaires aux cancers• la double mastectomie préventive• la gastrectomie totale préventive• le deuil du corps• la santé mentale• les antidépresseurs• la maternité après une mutation génétique• le regard des autres• l'association Geneticancer• la reconstruction

Dr. Deb Muth 00:02What if I told you that before a single drop of chemotherapy goes into a cancer patient’s body, we can take a blood sample, grow their actual living cancer cells in a lab, and test 70 different drugs against those cells, all outside the patient’s body, to find out which ones actually work. And what if I told you that the conventional oncology doesn’t routinely use this test? Well, today we’re going to talk about why that matters and we’re going to go through and I’m going to share a story that is very personal to me. It’s about a 38 year old man with a rare complex cancer diagnosis and the precision testing that is helping to keep that cancer from progressing. Stay with me. This is one that is going to change how you think about cancer treatment. Dr. Deb Muth 01:05You guys can put a little ad right in here before we start the next segment here. Hey everybody, welcome back to Let’s Talk Wellness Now. I’m Dr. Deb and today we’re going deep. I mean really deep. It’s some of the most cutting edge cancer testing I have ever seen in clinical practice. Now, normally I don’t talk about cancer. And I would not be sharing this story if it was anyone other than my own family. I do have permission to share and talk about this publicly. So I want to do this. I want to make sure that I share this message. And he is giving his blessing to share this story because we both believe that it can save lives. So his name is Cameron. He’s 38 years old. And he is my son-in-law. And two years ago, he came to me with a small lymph node underneath his arm and a bullseye rash. So of course, being the lime literate person that I am, my first inclination was to say, yeah, this makes sense. You have an enlarged lymph node because you have this bullseye rash. You got bit by the tick. Let’s keep an eye on it. If it doesn’t go away, let me know. So Fast forward a year and a half later, he comes to me and says, mom, what do you think about this? This thing is getting a little bit larger. And I said, yeah, it’s a little larger. Not sure. Let’s keep an eye on it. He wasn’t feeling anything. All his labs looked okay. And then one day he was out chopping wood and he started getting numbness in that arm and he felt it again. And it had exploded in size. And so after some evaluation with my daughter and him, we decided to do a ultrasound. And we thought what was going to come back was a fatty tumor. It felt like one looks like one responded to one. He’s 38 years old. He’s healthy. There’s nothing in our mind that’s ever thinking the result that we’re going to get back. Dr. Deb Muth 03:28Is a possible lymphoma. Needless to say, we were shocked by that ultrasound result. And we go fast forward, we have the biopsy. I requested a total excisional biopsy. I was told by the oncologist that that was old school. They don’t do that that way anymore. And I need to stay out of this. I need to let the experts take care of this because that’s what they do best. And this came from a breast surgeon here in Wisconsin. And so I stepped back for a moment. I let him do his biopsy and what came back was adenocarcinoma of an unknown origin. Had we excised the entire lymph node, we would have had more tissue to work with. I think we could have gotten a better diagnosis. So over the course of the next two and a half, three months, we have some more imaging done. We have some more testing done. They send a pathology out to Mayo Clinic. And what continues to come back is this incongruent test results. If anybody’s ever had this, it’s extremely frustrating. One test shows lymphoma. Now it shows breast cancer. Then the next week it shows estrogen receptor HER2 positive breast cancer. Two weeks later, another test comes back and it says, no, it’s not HER2, it’s triple negative breast cancer. And now it looks like it’s out of the lymph nodes. Now it looks like it’s in the lymph nodes. And we do a PET scan and they can’t find cancer anywhere except in this axilla area. But now we find a lymph node on the right side. So it must have spread.Let’s go ahead and do a biopsy on that. And so they biopsy the right side and the right side comes back with nothing other than tattoo ink. Now, all of this is kind of crazy. I am not a cancer specialist. I want to start by saying that I am not a cancer specialist. What I am sharing today is from a mother-in-law’s perspective, from a medical detective’s perspective, I do know how to do research. I do know how to find answers. And so what I’m going to share with you Dr. Deb Muth 05:54Is totally my opinion and totally my experience. And I’m not telling anybody to do anything different than what their doctors are telling them to do. But I am telling you to ask questions. So I go deep down the rabbit hole and find out that Tattoo Ink can appear like metastatic cancer on a PET scan. And we all know everybody gets tattoos today. They’re all over everyone. And yet we’re not thinking about how this tattoo ink can cause problems for us down the road, not to mention that there are heavy metals in them and it’s a toxin and it’s creating an inflammatory process in your body that your body’s constantly trying to get rid of. So the surgeon says to us, well, yes, that’s normal that that lymph nodes inflamed. It’s normal that there’s tattoo ink in it. The body’s doing what it’s supposed to do. It’s trying to get rid of a toxin. Okay. I will agree with that, but My son-in-law is covered with tattoos everywhere. And why didn’t we mention the tattoo ink that was found in the left axilla? We are only mentioning it in the right axilla. So there’s a lot of controversy, a lot of confusion. Many of you would never know any of this because A, you either don’t look at your lab results. And if you do, you don’t understand what you’re looking at. And that creates a problem for us, right? You don’t know what questions to ask. So we go into the doctor and the doctor tells us you have cancer and we’re going to swoop you in. And in the next two weeks, you’re going to be doing chemotherapy and radiation. And six months from now, we’re going to be doing surgery and there’s no time for questions and you’re scared shitless and you’re just doing what you can to survive. And I get that. And I totally understand that. And I appreciate that. But I’m telling you that If that is your choice, that is your choice. But as you’re doing that, take the time to ask the right questions. When this happened to us, there was a lot of challenging things with the oncology team. Nobody bothered to allow them to be a partner in their care. They dictated their care, but didn’t allow them to be a partner. So, Dr. Deb Muth 08:17Here’s what most oncologists do when patients get a cancer diagnosis. They look at the tumor type, they look at the stage, they look up the NCC guidelines, the National Comprehensive Cancer Network, and they follow the algorithm. Now, I have an enormous respect for conventional oncology. I really do. Working with cancer is probably one of the hardest things in medicine that anyone can do. The advances in this field over the last 10 years have been remarkable. But here’s my issue. Standard treatment assumes your cancer is the same as the cancer in the clinical trial that created the guidelines. It’s assuming that you and your cancer are the exact same as everyone else. You are the unique fingerprint, not the cancer. And this is the problem because your cancer is unique, just as unique as if you had your fingerprint taken, the mutations driving your tumor, the drugs your cancer cells are sensitive to, the metabolic vulnerabilities of your cancer. These are all different from the person sitting next to you in the chemo suite that has the same triple negative breast cancer or HER2 positive breast cancer or prostate cancer or colon cancer that you have. So what do do about that? Well, in my world, in the integrative medicine world, we test precisely, intelligently with the tools that most oncologists have never heard of. Or if they have, they haven’t incorporated it into their treatment modality for a variety of reasons. Either it’s not acceptable by the organization that they work for, they don’t understand it, They’re not going to be able to change their protocol anyway because they have to follow the NCCN protocol. So they don’t do it or they use a portion of it and they don’t do anything outside the protocol. So today I want to cover three things with you, three tools that we used that I think every cancer patient should be asking for when they start treatment or wherever you are in treatment at this point. Dr. Deb Muth 10:44you need to have these tests done. I don’t have any affiliation with any of these companies. I don’t get paid to tell you any of this. So let me just start by saying that I understand the chemistry behind these and how important it is to give you precision cancer treatment. And that’s why I’m talking about them today. The first one we’re going to talk about is the North Star response. This is your cancer surveillance score in the blood. How much cancer is circulating in the blood. The North Star Select, your cancer’s genomic blueprint from a blood draw. And the Datar Cancer Genetic Chemoscale, the live cell drug sensitivity test that tells us which drugs actually kill your cancer. So let’s go. Let’s dive into this. Let me just take a drink here. I’m going to cough a little bit. I apologize. I have this horrible tickle. It just never seems to go away, but that is not for today to discuss. So what is all of this? OK, the North Star response is a test that was developed by a company called Billion to One. And yes, that name is intentional because of the precision involved. It’s a next generation sequencing test, meaning it reads DNA at an incredibly detailed level. And it looks at something called methylated circulating tumor DNA or methylated CT DNA. Now let me break this down in plain English for you, because this can get a little overwhelming. When the cancer cells die or shed, they release tiny fragments of DNA into your bloodstream. We call this cell-free DNA or CFDNA, and it’s hidden within that cell-free DNA. And there are fragments that come from tumor cells. We call those CT DNA or circulating tumor DNA. Here’s what makes North Star’s response different. Rather than just looking for mutations in that tumor DNA, which is what most liquid biopsies do, and a liquid biopsy is just a blood test, Dr. Deb Muth 13:03This test looks at something called methylation patterns. Think of methylation like a dimmer switch on a gene. In healthy cells, certain genes are switched on and off in a very predictable way. In cancer cells, those dimmer switches go haywire. And cancer DNA has a characteristic hypermethylation, meaning switches are turning on and should be off or off and they should be on. And these patterns are essentially a cancer fingerprint in the blood. Now the North Star response scans more than 2000 locations in the genome for these cancer specific methylation patterns. And then it adds them all up into a single number called the tumor methylation score or TMS. So for Cameron, Cameron’s blood which was drawn on April 20th, 2026, his baseline tumor methylation score came back at 13. Now here’s the critical thing, to understand this was his baseline test, his starting point. And the real power of this test is in serial monitoring, meaning we run it again and again and again over time. And if that number goes up, the cancer activity is likely increasing. If it goes down, we’re likely suppressing the tumor activity. And if it stays flat or falls, that’s telling us that the disease is responding. So this is now in the blood. We have an actual fingerprint and every test from here forward will be compared to this number. Now let’s talk a little bit about this because I was not familiar with this test at all. I wasn’t sure what to expect. I wasn’t sure what to do with it. I did not order this test. He’s working with Inveda Medical and they are fabulous over there. I will tell you that from the beginning. This is coming from a practitioner and from a mother-in-law. They were absolutely wonderful to us. So when I saw this North Star, I didn’t know, should it be zero? Should it be a hundred? And when I talked to the doctor, he said, Dr. Deb Muth 15:29This number is actually really good. An average person walking around who’s never been diagnosed with cancer, who doesn’t have cancer, their number will be between 75 and 100. Cameron’s was 13. I think that’s fantastic. But what was the first question that went through my head? It’s probably the same question that you guys are doing. How can he have cancer with a number of 13 when it’s less than the normal average? And if we’re supposed to use this to track what’s happening with his cancer, how are we going to do that once we remove the cancer? Is this number going to go to zero? And it could possibly do that. And we may not be able to use this to track whether or not the disease is actually gone. But what we can do is use this to track over the course of his lifetime to see if the cancer cells are coming back long before we detect them on imaging. And that’s the huge part of this.So this is not a test that just anybody should go out and get because you’re worried about cancer. It is a test that should be done in somebody that is already diagnosed with cancer. So let’s start by making sure we explain that, okay? So imagine if every time your cancer cells are active and they’re shedding and they’re multiplying and they’re fighting back, they’re leaving a signature in your blood not just any signature, but a specific chemical tag that says, cancer’s here. That’s what the North Star Response Test reads. Those tags across thousands of locations and gives us a single score. So we track that score over time like a thermometer for your tumor. If it goes up, we get concerned. If it stays stable or goes down, we celebrate. And we can catch a change in the blood often months before it will show up on a scan. Pretty important when we’re talking about surveilling somebody for cancer returning, when we’re worried about it, and everybody knows the cancer patient is always worried after they get that clean bill health that something’s gonna come back, and most of the time they’re told that there is no way for them to determine that or know that from a blood test. And here is the blood test that can tell us, yes, it can. Dr. Deb Muth 17:51So I would really encourage you guys to talk to your oncologist about this. If you can’t find an oncologist that will do this, talk to an integrative cancer doctor. They will most likely be familiar with it. If not, ask them to find it for you and order it for you. So next, let’s talk about that genetic blueprint because North Star Select is a different test also by billion to one run on the same blood draw, but this one is doing something completely different. This is a comprehensive genomic liquid biopsy. Liquid biopsy just means blood tusks, meaning it’s looking for specific mutations in 84 cancer related genes, all from a blood sample, no biopsy needle, no surgery, just a blood draw. It looks for CNVS, single nucleotide variants, tiny one-letter typos in the DNA code. It looks for indels, small insertions or deletions in the DNA. It looks for copy number changes, the sections of the genomes that are duplicated or deleted. It looks at fusions. So when two genes incorrectly link together to create a dangerous hybrid, MSI status, micro satellite instability, which tells us whether immunotherapy is likely to work. And it has extraordinary sensitivity. It can detect a mutation that represents as little as 0.15 % of cell free DNA in the bloodstream. That is an almost impossibly small signal in the ocean of genetic noise. So what did this show for Cameron? This is where Cameron’s case gets clinically fascinating and where it tells the story of how his cancer is being held in check. Two major mutations were identified as actionable. One was called CRAS G12C. Dr. Deb Muth 20:11And it’s a variant-ELI fraction at 0.1%. Now, CRAS, if you’ve spent any time in integrative oncology, you’ve heard this name. CRAS is one of the most well-known oncogenes in cancer biology. Think of it like an accelerator pedal in the car. In a healthy cell, CRAS pushes the cell to grow when it receives the signal to do so. And then it stops. In cancer, crass gets stuck in the go position, like on the accelerator, foot on the accelerator, to the floor, going as fast as you can around that track, right? But it’s stuck there permanently. It doesn’t turn off and it’s supposed to be turning off. The G12C variant specifically is a mutation at a very precise location. Position 12 of the CRAS protein, where a glycine is replaced by cysteine. And this matters because CRAS G12C is now a drugable target. There are FDA approved drugs specifically designed to lock this mutation into its inactive state, essentially putting a foot on the brake. Now those are drugs like, and I’m gonna slaughter these names, Sordisib, a brand name is Lumacras, and Atacras, the brand name is Crastol. Neither is yet FDA approved for breast cancer, but they are approved for lung and colorectal cancer with CrasG2C. And Cameron’s tests identified 10 active clinical trials within a region that he could potentially qualify for with this mutation. The fact that his CRAS G12C is circulating at only 0.1%. That is a very low fraction. We call that a VAF, V-A-F, very low fraction. And it tells us something important. It means that this mutation is present in a small subclone of the tumor. It’s not the overall tumor burden. So either way, when we identify, we know it’s there. Dr. Deb Muth 22:37We can catch it and we can watch it. Now, here’s another interesting thing that we saw. His TP53 was at 0.23%. This is a tumor suppressor gene, the guardian of genome. And this gene is responsible for telling damaged cells to either repair themselves or self-destruct. And when it mutates as it is here in the position R196Q, that guardian goes off duty. The cell no longer has a reliable mechanism to prevent uncontrolled growth. So TP53 mutations are present in roughly 50 % of all human cancers. And there’s currently no FDA approved drug directly targeting the TP53 but there are clinical implications. TP53 mutant tumors may respond differently to chemotherapy and several investigational approaches, including TP53 vaccines and aurora kinase inhibitors are under active investigation. So we are seeing things happen in this part of cancer right now. Now there’s something called the VUS list and we are watching This is what we’re watching. beyond those two actionable mutations, NORSTAR Select identified what we call variants of an unknown significance, VUS, adenocarcinoma of an unknown significance, ACUP. These are mutations where we don’t yet have enough clinical evidence to determine whether they’re driving cancer or not, but we watch them. So on our mutation list was CDH1, a gene linked to hereditary gastric and lobular breast cancer, CDKN2A, a tumor suppressor cell cycle regulator, CDK12, involved in DNA repair, EGFR, ERBB, this is HER2 receptor, tyrosine kinases. Dr. Deb Muth 24:55I thought this one was pretty interesting since he had an IHC that showed a three plus HER2, but then when we confirmed it with FISH, FISH showed that was negative, but now we’re actually seeing genes expressing this HER2. So is there a HER2? Is there not a HER2? This is really important because if we don’t get these diagnoses right in cancer the first time, people will spend months and years treating the wrong type of cancer with the wrong type of medication. And this may be in part why some people do better than others. If we get it right out of the gate, they do good. If we don’t get it right out of the gate, they don’t do so good. Very important to have the actual genetic makeup of the tumor that’s growing in somebody. Now last, we have something called Notch C1, NRAS and RAF1. These are key pathway components. Now all of these were at very low baffs under 0.5%. These are just whispers, not shouts, but whispers that this cancer is excreting, but your body is listening. We have to be listening. We have to be able to watch these things and monitor these. Now here’s another note of clinical interest. It was an androgen receptor positive cancer. So also detected as a VUS.We know from tissue pathology that Cameron’s tumor was androgen receptor positive. So seeing this in circulation confirms that this AR expression of the cells are present in the bloodstream and that an anti-androgen approach remains worth considering. What that means is suppressing the testosterone. What all of you know I’m about ready to say is that I hate ever suppressing hormones, especially in a 38 year old male. That is not necessarily a good thing. So before we go suppressing hormones willy-nilly, we have to know that it’s the right thing to do. And we have to be able to combat all of the complications that are going to result of that. A 38-year-old male with no testosterone could lead to heart disease down the road, could lead to bone loss, could lead to dementia, Alzheimer’s. Not to mention the sexual side effects that are going to be present. And in a man that is very, very Dr. Deb Muth 27:20Difficult for someone to manage. So you have to be very specific and you want to be very, very diligent about what you’re doing in these cases like this. Now the MSI status was not detected. This tells us that cancer is not a microsatellite instability high, meaning that standard monotherapy may have a lower baseline response of probability and the strategic integration that we’re working with with in Vita could create an immunogenesis genicity becomes even more critical. So immunotherapy is going to be very critical in a cancer case like this and working with somebody that understands that and can carefully navigate that, especially if you have an autoimmune disease like Hashimoto’s or lupus, this is all very, very pristine and has to be looked at very carefully and done very diligently in order for somebody to do this without overstimulating that immune system and causing more problems. So when we looked at the blood and found this DNA fingerprint of the cancer cells circulating in the body, from that, what we see exactly is the genetic switches that are stuck on. They’re stuck on in the wrong position. This tells us which drugs were designed to fix exactly that problem. And it opens the door to clinical trials built for these specific mutations. It also gives us a list of things to watch for over time. And if one of those tiny little signals starts to grow, we know that cancer is gaining a ground in that area. And if it shrinks or disappears, we know we’re winning. This is like, I cannot tell you how exciting this is in the cancer world and the medical world because this is really pristine cancer therapy that we’re dealing with here. And to be able to have this is just so important to life saving events in treating cancer. So. Dr. Deb Muth 29:41Let’s talk about something called the Dittar Chemoscale. This is the battle before the battle. Okay, so I’ve saved the most remarkable test for last, and this is one from a company called Dittar Cancer Genetics. They’re based out of the UK. They are CAP and CLIA certified, which means it meets the rigorous standards required for clinical laboratory testing in the US. And this test is called the ChemoScale. And it is a live cell chemosensitivity assay. So let me explain exactly what that means because it sounds complex, but the concept is actually quite elegant. When we drew the blood from Cameron, the Dittar’s laboratory isolated what are called circulating tumor associated cells or CTACs. And these are actually living cancer cells and they’re associated cells that are traveling through his bloodstream. Excuse me. So let’s think about that for a moment. Real live cancer cells isolated from a blood draw. Those living cancer cells were placed into a lab environment and exposed to over 70 different drugs, both conventional chemotherapy agents and what we call repurposed drugs. I’ll talk more about those in a minute. The lab then measured how many of those cancer cells were killed by each drug expressed as a percentage of cell death. So the scale runs from zero to a hundred and below 25%, that drug doesn’t work well against any type of cancer in that person. Might work great in somebody else, but in that particular person’s cancer that they have, it’s not gonna work so great. Anything that’s 25 to 50 % is intermediate and above 50 % is a high response. And that’s really where Dr. Deb Muth 31:43we want to be. We want to see anything higher than 50 % because that’s a great medication that can be used to kill the cancer. This is not a theoretical test. This is not based on tumor’s genetic sequence and the computer algorithm that predicts the drug response. This is a HIS actual tumor cell being killed or not being killed in real time. That is the difference. So in traditional chemotherapy, we have our protocols. If you have triple negative breast cancer, if you have HER2 positive breast cancer, if you have prostate cancer, if you have colon cancer, here’s the protocol that you’re going to use because that’s the type of cancer you have. That’s what’s been studied. Now, the problem is most of these cancers have mutated over time, especially depending on how long they’ve been in your body, because that’s what they do to try to survive. They have to change so they can survive because your immune system’s constantly trying to kill them. And so this is a really important thing. And if we don’t take an individual into response or into our thought process when we’re creating these protocols, we may give a drug that doesn’t work at all towards that cancer and you just wasted seven cycles of chemotherapy with a drug that never would have worked in the first place or had such low resistance to it that it’s now just created side effects for you but did nothing to the cancer. And then we pull out another drug and we try that. And then we pull out another drug and we try that. Instead of us knowing precisely what we can use and what we can do. And this goes for both the conventional world and the alternative world. In the alternative world of cancer, we use things like IV vitamin C and tumeric and lately ivermectin and fenbendazole and mendendazole and all kinds of other things. And if we are not truly aware that this is going to do anything, we could be wasting somebody’s time and money. So I love that this test is available. I want to walk you through a little bit about what Dr. Deb Muth 34:01we are what we saw in our case, because I think this can make a big impact on people to ask the right questions. So this particular blood test looked at several different drugs. Cameron had sensitivity from 44 % up to 61 % on different medications. Now he was really lucky. The three main drugs that they would use to treat his cancer he had greater than a 50 % response to. So that was great. However, the drugs that were recommended for him to use out of the gate had less than 50 % activity. So he would have had one drug that was really good, one drug that was not so good. And we don’t know what the outcome would have been, right? So I think this is such an incredible, incredible test to have done. This is critical friends. I’m telling you if his oncologist had chosen the two drugs based on the general guidelines for his tumor, his cells would have largely not survived. But because we ran this test, we know. So we know to avoid the drugs that won’t work and we focus on the firepower where it really counts. So I want to also talk about this repurposed drug result because this is where it gets integrated for us. Now, this section is what I want everyone in our community, our Let’s Talk Wellness community, our members to understand. This is where conventional medicine and integrative medicine intersect in a peer-reviewed clinical validated way. So the Dittar test looks at live cancer cells against what they call repurposed drugs, meaning pharmaceuticals and natural compounds that were developed for the purposes, for other purposes, like it could be an antibiotic, it could be an herbal medicine, it could be all kinds of things, vitamins, whatever. But they have demonstrated anti-cancer activity in research. And when we’re talking about integrative medicine, this is a lot of where we get Dr. Deb Muth 36:26The integrative protocols from because these particular drug compounds are known for having anti-cancer benefits. And so that’s how integrative protocols get developed. But again, it could be just like medication, like cancer drugs. If your body doesn’t have a susceptibility to it, then you’re using a product that’s not necessarily going to work. And we all know we cannot take everything that somebody recommends just simply because it has an anti-benefit to whatever it is we’re treating. There’s only so many supplements you can take. There’s only so many things you can do before you get burnt out on taking it. We call it supplement fatigue. And so we want to be very precise with what we’re doing and target this very specific area. So one of the things that showed up really, really well for our case was artemisium, sweet wormwood. It’s an anti-malarial drug that has very potent anti-cancer effects. Now I found this extremely interesting in Cameron’s case because he does have a positive tick-borne illness called Babesia. And this is one of the things that we use to treat Babesia. The other thing I think is very interesting in this case is we are studying how parasites affect cancer these days. And that’s how Ivermectin, Fenbendazole, and Menbendazole have all gotten thrown into the treatment of cancer. And so for this drug or this herb to be sensitive to this type of cancer is really intriguing to me in the world of parasites and how parasites are truly decreasing the body’s immune system and causing cancer to grow. Another thing that worked, showed up really well for him was Valprolac acid. It’s an anti-seizure drug with HDAC inhibitor properties, and this disrupts cancer cell gene expression. There was a soy formula that showed up really well. Naltrexone, you guys have heard me talk about low dose naltrexone, LDN. This actually stimulates an endogenous opioid immune response feeling, and this drug actually showed up really well. Dr. Deb Muth 38:49Something as simple as quercetin. It’s an anti-inflammatory. This is a crass inhibitor in some studies. So this is really important. I’m sure most of you have heard about the benefits of green tea and green tea also actually has anti-angiogenic or anti-cancer benefits to it. Hydroxychloroquine, very popular drug. It’s another anti-malarial drug. So again, now we have two anti-malarial drugs that are susceptible to this type of cancer. And on top of it, he has a positive babesia test. So just saying, you got to connect the dots sometimes. You got to think outside the box sometimes. Metformin is very well known as a anti-proliferative in cancer. We use it to suppress the sugar because sugar feeds cancer. Nobody should be eating sugar if they have cancer. So this one showed up as well. And then CBD, we all know of the benefits of THC, the Rick Simpson oil, and CBD can be tested to see if that is beneficial to a particular cancer cell. This is different than THC. THC works very differently in cancer. CBD is your healthy component of it. It’s the part of the marijuana plant that does not make you high. So very important here. So now let me be very clear, because I always try to be very clear. This is not FDA approved. I’m going to repeat that. This is not FDA approved. This test is a laboratory developed test, not FDA cleared. These results represent in vitro testing, meaning in a lab, not inside the human body. And the results can differ in what we call in vivo, inside the body. And this is why I always say work with a qualified clinician who can interpret these results in full clinical context. But here’s why this matters. We now have evidence, live evidence of a cancer cell that shows sensitivities to compounds that are accessible, relatively safe, and some of which he may already be using, which some of them we were. Dr. Deb Muth 41:13We were already using some of them, which made us sit back and say, this cancer has been in there for two years. If it’s a triple negative breast cancer, it’s supposed to be an aggressive breast cancer that should have spread to a different organ already after two years. It is not, it has stayed in one spot. Also interesting in this case is that there is no breast tumor that they could find anywhere. This was all confined to the axilla into the lymph node. So to have this growing for this period of time with such a small tumor marker number, that 13 that we talked about in the North Star test originally, and to see some mutations, there’s a lot of questions to this particular case. And there are lots of questions to everybody’s cancer case. They are not all straightforward cancer cases. So this is what’s important to understand this fingerprint of these cancer cells so that you can identify exactly, exactly what’s going on and treat it exactly the correct way. Super important. So this kind of information gives us the direction in an integrative protocol. It’s not guessing. This is not eat more tumor, I can hope for the best. This is personalized tumor specific precision guided integrative oncology. It is very precise. There are several countries, several clinics like this around the country that offer this type of therapy. If it’s something that you’re interested in doing, I would encourage you to look at in Vita Medical. Hope for Cancer is another great facility. There are several great facilities around the country. Like I said, that could put together an integrative approach for you if this is something that you are thinking about doing. If you’re looking for answers, if you’re in stage four or stage three and you are not getting the results that you want to get, you want to look at a different approach. You want to do a combo approach of integrative medicine and traditional medicine and alternative medicine. Dr. Deb Muth 43:37I think this is so important to look at and have experts on your team. You know, in our case, Cameron’s cancer is very complex. It’s genomically aggressive in its presentation, yet it’s not progressing to distant areas, which is so wonderful. And I want to be careful here. I can’t tell you with certainty that this is any one thing. Biology is complex. Cancer is adaptive. It’s trying to survive. That’s what it is supposed to do. It is changing its shape. It’s changing its genetic structure. It’s changing everything to try to survive and try to hide against your immune system. Now we are not even close to the finish line in our journey, but what I can tell you is that what the integrative precision approach has done that standard care alone might not do. I can tell you that today and I will share our journey along the way for any of you that are going through this that want to look at a different approach as well because I think it’s important to have this information. So first of all, we know the tumor’s fingerprint. North Star response gives us that TMS score. so we can track it over time. And if the cancer tries to gain ground, we’ll see it in the blood before a scan, we’ll show it. We know the cancer’s genetic vulnerability. We know how to handle the DNA now. We know the watch list of things to look for. And when those signals start to grow, we have a roadmap of how to address it next, how to change it. We know which drugs will automatically work against the tumor cells. We’re not guessing based on a tumor type. We tested the cells. We know how many drugs in the commercial world and in the repurposed world will and will not work. And this is going to guide the treatment protocol that we walk forward with. So we’re not giving him drugs that won’t work or have a low response. Dr. Deb Muth 45:55We’re avoiding them completely and that matters because every ineffective drug is a dose of toxicity with no benefit. There is no lie to this. Chemotherapeutic drugs are toxic. That’s how they kill the cells, but they kill the good cells and the bad cells. And if we can avoid using a drug that’s not going to work, that is so important. And then we’re layering in those repurposed and natural compounds with proven activity against specific cells. This is not complementary fluff. This is biologically active tumor tested precision medicine. Very, very important. So here is what I need you all to know and what I want you to walk away with today. If you or someone you love is facing a cancer diagnosis before treatment starts, before the first infusion goes in, I want you to ask these questions so quick. Go grab something to write with. Pause this if you need to, because this is really, really important for you to do that. And we’re going to take a break for just a second while you guys go and do that. We’re going to give you a word from our sponsor, and then we’re going to come back. And I’m going to give you the four questions that I want you to ask specifically of your medical team so that you have the answers and the ammunition that you need to work with. So we’ll be right back. Dr. Deb Muth 47:29All right, everybody, welcome back. I hope you got your pencil, your paper, your pen, your phone, whatever you’re going to take notes with because this is important. So I’m to give you four questions that I want you to ask your medical team before you get started. Question one, can we do a chemo sensitivity test before we choose a chemotherapy regime? Ask specifically about DATAR, D-A-T-A-R. cancer genetics, Oncostat Plus, or a similar functional chemosensitivity platform. Very, very important to ask those specific things. All right, question two. Can we do a comprehensive liquid biopsy to identify actionable mutations and monitor tumor burden? Ask about North Star Select, Billion to One, Guardian 360, or Foundation One Liquid CDX? I’m gonna say those for you one more time, because I said them kind of fast. North Star Select by Billion to One, Guardian 360 or Foundation One Liquid CDX? Okay, question three. Can we establish a baseline tumor methylation score, TMS, so we have a surveillance marker to track over time? and ask specifically about the North Star Response Test. All right, question four. Is there an integrative oncology center that can layer precision guided natural compounds alongside conventional treatment? Research institutes like Inveda Medical Center, CTA CA Integrative Medicine, or Hope for Cancer, these people are doing integrative medical miracles. Let me tell you, I have researched every one of them. I have spoken to each of them individually before we made our decision of who we were going to work with. They are all fantastic. You want to work with an integrative nurse practitioner who understands oncology. And if you’re working with an integrative practitioner, you want to ask them these same questions about this test so that you can get the best outcome. Dr. Deb Muth 49:56For what you’re dealing with. You are allowed to ask these questions. You are allowed to want more information from that protocol that was designed for the average patient. You’re not average and your cancer is not average either. And your care doesn’t have to be. You do not have to settle for the same thing that the person sitting next to you in the IV suite is dealing with when you both have different cancers excreting different genetic material. This is so incredibly important. want to make sure you understand precision medicine is what changes the lives for people every single day, every single day. So I started this episode by telling you about a 38 year old man with a cancer that baffled conventional medicine and integrative medicine, an occult primary that was not found complex genetic genomic profile, a presentation that in many hands might have resulted in a one size fits all treatment protocol and a prayer. And instead we ran the tests, we mapped the fingerprint, we watched the cells, we guided the protocol, and we are still fighting with precision, with data, with intelligence. This is what Let’s Talk Wellness is all about not giving up. This is what not accepting we don’t know as a final answer and demanding the level of scrutiny and personalization that every cancer patient deserves. So if this episode resonates with you, please share it because somewhere out there, there is a person who is about to get the wrong chemotherapy because no one ran the right test. And maybe, just maybe, that This episode will be the reason someone asks the right question at the right moment. If you’re going through something like this, you need a group, you need somebody to connect with, please join our free Facebook group called Seen At Last. It is where we support one another, we share this information, we share knowledge, and we help people for free support and ask the right questions. Dr. Deb Muth 52:23And if you’re inclined in your heart to pray, pray for Cameron, we could use every ounce of prayer. If you are in a position where you can help support this journey financially, we do have a fund going in free funder. I can post the link below. Every little bit helps. If you have $5, $500, it doesn’t matter. We’re raising money for this treatment. And along the way, I am documenting every step of what we’re going through so I can provide more episodes like this for you guys to share the outcome and share what our journey is like so that it can help the next person along. I really always believe that whatever happens to us happens to us because we’re meant to share it. That’s why I’ve shared my personal journey. I’m sharing his personal journey and we want to help other people. So until next time, I’m Dr. Deb. Keep asking questions, keep advocating, and never ever accept being unseen.The post Episode 274 – Stop Guessing on Chemotherapy: The Live Cell Test Most Doctors Miss first appeared on Let's Talk Wellness Now.

Program notes:0:35 New cholesterol lowering guidelines1:35 Risk scores new2:35 Mainstay is behavioral change3:35 For those with a longer view4:00 AI based glaucoma screening in primary care settings5:00 Either AI or pressure6:00 Fundus photograph and intraocular pressure7:00 Sensitivity and specificity7:50 Diet and brain structure8:50 Brain imaging over ten or fifteen years9:50 Diet that's been advocated for a long time10:55 Surveying wastewater for colorectal cancer markers11:55 CDH1 marker measurement12:55 Shows promise for intervention13:57 End

JCO PO author Dr. Foldi at UPMC Hillman Cancer Center and University of Pittsburgh School of Medicine shares insights into the JCO PO article, "Personalized Circulating Tumor DNA Testing for Detection of Progression and Treatment Response Monitoring in Patients With Metastatic Invasive Lobular Carcinoma of the Breast." Host Dr. Rafeh Naqash and Dr. Foldi discuss how serial ctDNA testing in patients with mILC is feasible and may enable personalized surveillance and real-time therapeutic monitoring. TRANSCRIPT Dr. Rafeh Naqash: Hello, and welcome to JCO Precision Oncology Conversations, where we bring you engaging conversations with authors of clinically relevant and highly significant JCO PO articles. I am your host, Dr. Rafeh Naqash, podcast editor for JCO Precision Oncology and Associate Professor at the OU Health Stephenson Cancer Center at the University of Oklahoma. Today, we are thrilled to be joined by Dr. Julia Foldi, Assistant Professor of Medicine in the Division of Hematology-Oncology at University of Pittsburgh School of Medicine and the Magee-Womens Hospital of the UPMC. She is also the lead and corresponding author of the JCO Precision Oncology article entitled "Personalized Circulating Tumor DNA Testing for Detection of Progression and Treatment Response Monitoring in Patients with Metastatic Invasive Lobular Carcinoma of the Breast." At the time of this recording, our guest's disclosures will be linked in the transcript. Julia, welcome to our podcast, and thank you for joining us today. Dr. Julia Foldi: Thank you so much for having me. It is a pleasure. Dr. Rafeh Naqash: Again, your manuscript and project address a few interesting things, so we will start with the basics, since we have a broad audience that comprises trainees, community oncologists, and obviously precision medicine experts as well. So, let us start with invasive lobular breast carcinoma. I have been out of fellowship for several years now, and I do not know much about invasive lobular carcinoma. Could you tell us what it is, what some of the genomic characteristics are, why it is different, and why it is important to have a different way to understand disease biology and track disease status with this type of breast cancer? Dr. Julia Foldi: Yes, thank you for that question. It is really important to frame this study. So, lobular breast cancers, which we shorten to ILC, are the second most common histologic subtype of breast cancer after ductal breast cancers. ILC makes up about 10 to 15 percent of all breast cancers, so it is relatively rare, but in the big scheme of things, because breast cancer is so common, this represents actually over 40,000 new diagnoses a year in the US of lobular breast cancers. What is unique about ILC is it is characterized by loss of an adhesion molecule, E-cadherin. It is encoded by the CDH1 gene. What it does is these tumors tend to form discohesive, single-file patterns and infiltrate into the tumor stroma, as opposed to ductal cancers, which generally form more cohesive masses. As we generally explain to patients, ductal cancers tend to form lumps, while lobular cancers often are not palpable because they infiltrate into the stroma. This creates several challenges, particularly when it comes to imaging. In the diagnostic setting, we know that mammograms and ultrasounds have less sensitivity to detect lobular versus ductal breast cancer. When it comes to the metastatic setting, conventional imaging techniques like CT scans have less sensitivity to detect lobular lesions often. One other unique characteristic of ILC is that these tumors tend to have lower proliferation rates. Because our glucose-based PET scans depend on glucose uptake of proliferating cells, often these tumors also are not avid on conventional FDG-PET scans. It is a challenge for us to monitor these patients as they go through treatment. If you think about the metastatic setting, we start a new treatment, we image people every three to four cycles, about every three months, and we combine the imaging results with clinical assessment and tumor markers to decide if the treatment is working. But if your imaging is not reliable, sometimes even at diagnosis, to really detect these tumors, then really, how are we following these patients? This is really the unique challenge in the metastatic setting in patients with lobular breast cancer: we cannot rely on the imaging to tell if patients are responding to treatment. This is where liquid biopsies are really, really important, and as the field is growing up and we have better and better technologies, lobular breast cancer is going to be a field where they are going to play an important role. Dr. Rafeh Naqash: Thank you for that easy-to-understand background. The second aspect that I would like to have some context on, to help the audience understand why you did what you did, is ctDNA, tumor informed and non-informed. Could you tell us what these subtypes of liquid biopsies are and why you chose a tumor informed assay for your study? Dr. Julia Foldi: Yes, it is really important to understand these differences. As you mentioned, there are two main platforms for liquid biopsy assays, circulating tumor DNA assays. I think what is more commonly used in the metastatic setting are non-tumor informed assays, or agnostic assays. These are generally next-generation sequencing-based assays that a lot of companies offer, like Guardant, Tempus, Caris, and FoundationOne. These do not require tumor tissue; they just require a blood sample, a plasma sample, essentially. The next-generation sequencing is done on cell-free DNA that is extracted from the plasma, and it is looking for any cell-free DNA and essentially, figuring out what part of the cell-free DNA comes from the tumor is done through a bioinformatics approach. Most of these assays are panel tests for cancer-associated mutations that we know either have therapeutic significance or biologic significance. So, the results we receive from these tests generally read out specific mutations in oncogenic genes, or sometimes things like fusions where we have specific targeted drugs. Some of the newer assays can also read out tumor fraction; for example, the newest generation Guardant assay that is methylation-based, they can also quantify tumor fraction. But the disadvantage of the tumor agnostic approach is that it is a little bit less sensitive. Opposed to that, we have our tumor informed tests, and these require tumor tissue. Essentially, the tumor is sequenced; this can either be whole exome or whole genome sequencing. The newer generation assays are now using whole genome sequencing of the tumor tissue, and a personalized, patient-specific panel of alterations is essentially barcoded on that tumor tissue. This can be either structural variants or it can be mutations, but generally, these are not driver mutations, but sort of things that are present in the tumor tissue that tend to stay unchanged over time. For each particular patient, a personalized assay, if you want to call it a fingerprint or barcode, is created, and then that is what then is used to test the plasma sample. Essentially, you are looking for that specific cancer in the blood, that barcode or fingerprint in the blood. Because of this, this is a much more sensitive way of looking for ctDNA, and obviously, this detects only that particular tumor that was sequenced originally. So, it is much more sensitive and specific to that tumor that was sequenced. You can argue for both approaches in different settings. We use them in different settings because they give us different information. The tumor agnostic approach gives us mutations, which can be used to determine what the next best therapy to use is, while the tumor informed assay is more sensitive, but it is not going to give us information on therapeutic targets. However, it is quantified, and we can follow it over time to see how it changes. We think that it is going to tell us how patients respond to treatment because we see our circulating tumor DNA levels rise and fall as the cancer burden increases or decreases. We decided to use the tumor informed approach in this particular study because we were really interested in how to determine if patients are having response to treatment versus if they are going to progress on their treatment, more so than looking for specific mutations. Dr. Rafeh Naqash: When you think about these tumor informed assays and you think about barcoding the mutations on the original tumor that you try to track or follow in subsequent blood samples, plasma samples, in your experience, if you have done it in non-lobular cancers, do you think shedding from the tumor has something to do with what you capture or how much you capture? Dr. Julia Foldi: Absolutely. I think there are multiple factors that go into whether someone has detectable ctDNA or not, and that has to do with the type of cancer, the location, right, where is the metastatic site? This is something that we do not fully understand yet: what are tumors that shed more versus not? There is also clearance of ctDNA, and so how fast that clearance occurs is also something that will affect what you can detect in the blood. ctDNA is very short-lived, only has a half-life of hours, and so you can imagine that if there is little shedding and a lot of excretion, then you are not going to be detecting a lot of it. In general, in the metastatic setting, we see that we can detect ctDNA in a lot of cases, especially when patients are progressing on treatment, because we imagine their tumor burden is higher at that point. Even with the non-tumor informed assays, we detect a lot of ctDNA. Part of this study was to actually assess: what is the proportion of patients where we can have this information? Because if we are only going to be able to detect ctDNA in less than 50 percent of patients, then it is not going to be a useful method to follow them with. Because this field is new and we have not been using a lot of tumor informed assays in the metastatic setting, we did not really know what to expect when we set out to look at this. We did not know what was going to be the baseline detection rate in this patient population, so that was one of the first things that we wanted to answer. Dr. Rafeh Naqash: Excellent. Now going to this manuscript in particular, what was the research question, what was the patient population, and what was the strategy that you used to investigate some of these questions? Dr. Julia Foldi: So, we partnered with Natera, and the reason was that their Signatera tumor-informed assay was the first personalized, tumor-informed, really an MRD assay, minimal residual disease detection assay. It has been around the longest and has been pretty widely used commercially already, even though some of our data is still lacking. but we know that people are using this in the real world. We wanted to gather some real-world data specifically in lobular patients. So, we asked Natera to look at their database of commercial Signatera testing and look for patients with stage 4 lobular breast cancer. The information all comes from the submitting physicians sending in pathologic reports and clinical notes, and so they have that information from the requisitions essentially that are sent in by the ordering physician. We found 66 patients who were on first-line or close to first-line endocrine-based therapies for their metastatic lobular breast cancer and had serial collections of Signatera tests. The way we defined baseline was that the first Signatera had to be sent within three months of starting treatment. So, it is not truly baseline, but again, this is a limitation of looking at real-world data is that you are not always going to get the best time point that you need. We had over 350 samples from those 66 patients, again longitudinal ctDNA samples, and our first question was what is the baseline detection rate using this tumor informed assay? Then, most importantly, what is the concordance between changes in ctDNA and clinical response to treatment? That is defined by essentially radiologic response to treatment. Dr. Rafeh Naqash: Interesting. So, what were some of your observations in terms of ctDNA dynamics, whether baseline levels made a difference, whether subsequent levels at different time points made a difference, or subsequent levels at, let us say, cycle three made a difference? Were there any specific trends that you saw? Dr. Julia Foldi: So, first, at baseline, 95 percent of patients had detectable ctDNA, which is, I think, a really important data point because it tells us that this can be a really useful test. If we can detect it in almost all patients before they start treatment, we are going to be able to follow this longitudinally. And again, these were not true baseline samples. So, I think if we look really at baseline before starting treatment, almost all patients will have detectable ctDNA in the metastatic setting. The second important thing we saw was that disease progression correlated very well with increase in ctDNA. So, in most patients who had disease progression by imaging, we saw increase in ctDNA. Conversely, in most patients who had clinical benefit from their treatment, so they had a response or stable disease, we saw decrease in ctDNA levels. It seems that what we call molecular response based on ctDNA is tracking very nicely along with the radiographic response. So, those were really the two main observations. Again, this is a small cohort, limited by its real-world nature and the time points that ctDNA assay was sent was obviously not mandated. This is a real-world data set, and so we could not really look at specific time points like you asked about, let us say, cycle three of therapy, right? We did not have all of the right time points for all of the patients. But what we were able to do was to graph out some specific patient scenarios to illustrate how changes in ctDNA correlate with imaging response. I can talk a little bit about that. Dr. Rafeh Naqash: That was going to be my question. Did you see patients who had serial monitoring using the tumor informed ctDNA assay where the assay became positive a few months before the imaging? Did you have any of those kinds of observations? Dr. Julia Foldi: Yes, so I think this is where the field is going: are we able to use this technology to maybe detect progression before it becomes clinically apparent? Of course, there are lots of questions about: does that really matter? But it seems like, based on some of the patient scenarios that we present in the paper, that this testing can do that. So, we had a specific scenario, and this is illustrated in a figure in the paper, really showing the treatment as well as the changes in ctDNA, tumor markers, and also radiographic response. So, this particular patient was on first-line endocrine therapy and CDK4/6 inhibitor with palbociclib. Initially, she had a low-level detectable ctDNA. It became undetectable during treatment, and the patient had a couple of serial ctDNA assays that were negative, so undetectable. And then we started, after about seven months on this combination therapy, the ctDNA levels started rising. She actually had three serial ctDNA assays with increasing level of ctDNA before she even had any imaging tests. And then around the time that the ctDNA peaked, this patient had radiographic evidence of progression. There was also an NGS-based assay sent to look for specific mutations at that point. The patient was found to have an ESR1 mutation, which is very common in this patient population. She was switched to a novel oral SERD, elacestrant, and the ctDNA fell again to undetectable within the first couple months of being on elacestrant. And then a very similar thing happened: while she was on this second-line therapy, she had three serial negative ctDNA assays, and then the fourth one was positive. This was two months before the patient had a scan that showed progression again. Dr. Rafeh Naqash: And Julia, like you mentioned, this is a small sample size, limited number of patients, in this case, one patient case scenario, but provides insights into other important aspects around escalation or de-escalation of therapy where perhaps ctDNA could be used as an integral biomarker rather than an exploratory biomarker. What are some of your thoughts around that and how is the breast cancer space? I know like in GI and bladder cancer, there has been a significant uptrend in MRD assessments for therapeutic decision making. What is happening in the breast cancer space? Dr. Julia Foldi: So, super interesting. I think this is where a lot of our different fields are going. In the breast cancer space, so far, I have seen a lot of escalation attempts. It is not even necessarily in this particular setting where we are looking at dynamics of ctDNA, but in the breast cancer world, of course, we have a lot of data on resistance mutations. I mentioned ESR1 mutation in a particular patient in our study. ESR1 mutations are very common in patients with ER-positive breast cancer who are on long-term endocrine therapy, and ESR1 mutations confer resistance to aromatase inhibitors. So, that is an area that there has been a lot of interest in trying to detect ESR1 mutations earlier and switching therapy early. So, this was the basis of the SERENA-6 trial, which was presented last year at ASCO and created a lot of excitement. This was a trial where patients had non-tumor-informed NGS-based Guardant assay sent every three to six months while they were on first-line endocrine therapy with a CDK4/6 inhibitor. If they had an ESR1 mutation detected, they were randomized to either continue the same endocrine therapy or switch to an oral SERD. The trial showed that the population of patients who switched to the oral SERD did better in terms of progression-free survival than those who stayed on their original endocrine therapy. There are a lot of questions about how to use this in routine practice. Of course, it is not trivial to be sending a ctDNA assay every three to six months. The rate of detection of these mutations was relatively low in that study; again, the incidence increases in later lines of therapy. So, there are a lot of questions about whether we should be doing this in all of our first-line patients. The other question is, even the patients who stayed on their original endocrine therapy were able to stay on that for another nine months. So, there is this question of: are we switching patients too early to a new line of therapy by having this escalation approach? So, there are a lot of questions about this. As far as I know, at least in our practice, we are not using this approach just yet to escalate therapy. Time will tell how this all pans out. But I think what is even more interesting is the de-escalation question, and I think that is where tumor informed assays like Signatera and the data that our study generated can be applied. Actually, our plan is to generate some prospective data in the lobular breast cancer population, and I have an ongoing study to do that, to really be able to tease out the early ctDNA dynamics as patients first start on endocrine therapy. So, this is patients who are newly diagnosed, they are just starting on their first-line endocrine therapy, and measure, with sensitive assays, measure ctDNA dynamics in the first few months of therapy. In those patients who have a really robust response, that is where I think we can really think about de-escalation. In the patients whose ctDNA goes to undetectable after just a few weeks of therapy with just an endocrine agent, they might not even need a CDK4/6 inhibitor in their first-line treatment. So, that is an area where we are very interested in our group, and I know that other groups are looking at this too, to try to de-escalate therapy in patients who clear their ctDNA early on. Dr. Rafeh Naqash: Thank you so much. Well, lots of questions, but at the same time, progress comes through questions asked, and your project is one of those which is asking an interesting question in a rarer cancer and perhaps will lead to subsequent improvement in how we monitor these individuals and how we escalate or de-escalate therapy. Hopefully, we will get to see more of what you are working on in subsequent submissions to JCO Precision Oncology and perhaps talk more about it in a couple of years and see how the space and field is moving. Thanks again for sharing your insights. I do want to take one to two quick minutes talking about you as an investigator, Julia. If you could speak to your career pathway, your journey, the pathway to mentorship, the pathway to being a mentor, and how things have shaped for you in your personal professional growth. Dr. Julia Foldi: Sure, yeah, that is great. Thank you. So, I had a little bit of an unconventional path to clinical medicine. I actually thought I was going to be a basic scientist when I first started out. I got a PhD in Immunology right out of college and was studying not even anything cancer-related. I was studying macrophage signaling in inflammatory diseases, but I was in New York City. This was right around the time that the first checkpoint inhibitors were approved. Actually, some of my friends from my PhD program worked in Jim Allison's lab, who was the basic scientist responsible for ipilimumab. So, I got to kind of first-hand experience the excitement around bringing something from the lab into the clinic that actually changed really the course of oncology. And so, I got very excited about oncology and clinical medicine. So, I decided to kind of switch gears from there and I went back to medical school after finishing my PhD and got my MD at NYU. I knew I wanted to do oncology, so I did a research track residency and fellowship combined at Yale. I started working early on with the breast cancer team there. At the time, Lajos Pusztai was the head of translational research there at Yale, and I started working with him early in my residency and then through my fellowship. I worked on several trials with him, including a neoadjuvant checkpoint inhibitor trial in triple-negative breast cancer patients. During my last year in fellowship, I received a Conquer Cancer Young Investigator Award to study estrogen receptor heterogeneity using spatial transcriptomics in this subset of breast cancers that have intermediate estrogen receptor expression. From there, I joined the faculty at the University of Pittsburgh in 2022. So, I have been there about almost four years at this point. My interests really shifted slowly from triple-negative breast cancers towards ER-positive breast cancers. When I arrived in Pittsburgh, I started working very closely with some basic and translational researchers here who are very interested in estrogen signaling and mechanisms of resistance to endocrine therapy, and there is a large group here interested in lobular breast cancers. During my training, I was not super aware even that lobular breast cancer was a unique subtype of breast cancers, and that is, I think, changing a little bit. There is a lot more awareness in the breast cancer clinical and research community about ILC being a unique subtype, but it is not even really part of our training in fellowship, which we are trying to change. But I have become a lot more aware of this because of the research team here and through that, I have become really interested also on the clinical side. And so, we do have a Lobular Breast Cancer Research Center of Excellence here at the University of Pittsburgh and UPMC, and I am the leader on the clinical side. We have a really great team of basic and translational researchers looking at different aspects of lobular breast cancers, and some of the work that I am doing is related to this particular manuscript we discussed and the next steps, as I mentioned, a prospective study of early ctDNA dynamics in lobular patients. I also did some more clinical research work in collaboration with the NSABP looking at long-term outcomes of patients with lobular versus ductal breast cancers in some of their older trials. And so, that is, in a nutshell, a little bit about how I got here and how I became interested in ILC. Dr. Rafeh Naqash: Well, thank you for sharing those personal insights and personal journey. I am sure it will inspire other trainees, fellows, and perhaps junior faculty in trying to find their niche. The path, as you mentioned, is not always straight; it often tends to be convoluted. And then finding an area that you are interested in, taking things forward, and being persistent is often what matters. Dr. Julia Foldi: Thank you so much for having me. It was great. Dr. Rafeh Naqash: It was great chatting with you. And thank you for listening to JCO Precision Oncology Conversations. Don't forget to give us a rating or review, and be sure to subscribe so you never miss an episode. You can find all ASCO shows at asco.org/podcasts. 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. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement.  

Host Matt Burgess speaks with genetic counsellor and NSGC president Sara Pirzadeh‑Miller about her early research on values in genetic counselling, how life experience shapes practice, and the evolving role of genetic counsellors. They also discuss the clinical challenges of the CDH1 gene, risk interpretation, screening versus prophylactic surgery, the rise of genetic counselling assistants, and future genomic innovations such as gene therapies and improved risk stratification.

Two athletes prove that getting older can mean getting stronger. We share how CrossFit, routine, and smart scaling rebuilt capacity after surgery, reversed a long decline, and made real life feel lighter.• why “I'm getting old” is the wrong script• early sports roots shaping mindset and grit• starting CrossFit in your 60s with coaching and progressions• Abigail's CDH1 gene story and total gastrectomy• rebuilding weight, strength, and confidence with scaling• shifting from endurance-only to strength-centered training• being “ready for anything” outside the gym• avoiding injury by managing ego and volume• how CrossFit complements swimming, running, and daily demands• protein choices, simple nutrition wins, and body comp shifts• sleep routines that support recovery and longevity• parting advice: train for yourself and keep the planBe on the lookout for next week's episode

Stacy Martin says genetic testing saved her life.   The testing indicated she had the CDH1 mutation.  The mutation gave her an 80 percent chance of getting gastric cancer and a 60 percent chance of breast cancer.  She opted for a prophylactic total gastrectomy to remove her stomach and addressed the possibility of breast cancer with a bilateral mastectomy.  Without a stomach, Stacy has had to change the way she eats, requiring food every two hours, and having to completely chew everything she eats.  Despite this live-changing surgery, Stacy is leading a healthy and happy life.   Unlike most people with cancer, Stacy's diagnosis was not preceded by symptoms.  Her mother had already been diagnosed with Stage IV uterin cancer.  That prompted Stacy and her siblings to undergo a genetic panel test.  It revealed Stacy had the CDH1 mutation, which meant she an 80 percent chance of getting gastric cancer and a 60 percent chance of breast cancer.    She had three options but chose to be proactive with a prophylactic total gastrectomy in 2019, a procedure that removed her stomach.  It was after the surgery that pathology revealed Stacy had gastric cancer in her removed stomach.    After successfully addressing the possibility of stomach cancer, she did the same with breast cancer with a bilateral mastectomy in 2020.   Stacy Martin said the toughest part of her cancer experience wasn't the treatment, but what she dealt with upon its completion.  She said she had to learn how to eat, and that without a stomach, she had to eat every two hours.  While she took snacks with her wherever she went, she had to alternate between snacks and something more substantial, making sure she got enough protein and carbohydrates.  Anything she ate had to be completely chewed because she no longer had the gastric juices in her stomach that break down food.  The only thing she can't eat are raw oysters because she says they are impossible to chew.   Stacy says genetic testing saved her life but admits it is not for everybody because the decision to go forth with such testing is a deeply personal decision because some people don't want to know what the tests could reveal. Despite her cancer journey, Stacy lives a happy life.  She resumed her passion of hiking near her home in Chattanooga, Tennessee, and consumption of nuts resulted in her establishing Seahorse Snacks, which she operates out of her home.   Additional Resources:   Seahorse Snacks: https://www.seahorsesnacks.com   No Stomach For Cancer: https://www.nostomachforcancer.org          

This episode is hosted by Josie Baker, MS, LGC, and features Maegan Roberts, MS, LGC, a Genetic Counselor from the Ohio State University.The in-depth discussions focus on CDH1 and hereditary diffuse gastric cancer, covering the history of discovery, evolving penetrance estimates, and updated risk insights. They explore differences between IGCLC's more conservative European approach and NCCN's U.S.-focused guidelines, offering practical advice on which to follow. The conversation highlights the challenges of genetic counseling, including how to approach discussions with honesty and confidence. Megan Roberts also shares her perspective from her work with the ClinGen CDH1 Variant Curation Expert Panel, IGCLC, and the Ohio State University CDH1-Associated BCDS Registry.Do you have a patient with a CDH1 variant and clinical features consistent with BCDS? The Ohio State University CDH1-Associated BCDS Registry is actively recruiting participants. This research initiative aims to better understand cancer risks and phenotypic characteristics associated with CDH1-related Blepharocheilodontic Syndrome (BCDS). Learn more HERE.

Meet Stacy Martin – the founder of Seahorse Snacks! She calls herself a seahorse because she chose to have her stomach removed due to an extremely rare genetic mutation (CDH1). Seahorses also don't have stomachs. Because she doesn't have a stomach, she has to eat frequently, like every two hours all day, every day. Because she eats so frequently, she often gets bored with eating the same thing over and over. Nuts are a great source of protein and she learned that she could make them extra delicious! Stacy joins Justin to discuss this up-and-coming snack brand.

In partnership, the CGA-IGC Education and Research Committees are pleased to present the second episode of a three-part series focused on Research Collaborations. This episode is hosted by Emma Keel, MS, CCG, who spoke with Ophir Gilad, MD, the lead of the Gastric CDH1 Multicenter Consortium.This episode is essential listening for clinicians, researchers, and anyone interested in hereditary GI cancer syndromes research. Learn about this consortium's strategies for ensuring data quality and the goal of creating the largest cohort of CDH1 patients to date to better understand the syndrome. 

In this episode of The Clinical Research Coach, host Leanne Woehlke sits down with Stacy Martin, who shares her journey of entering a clinical trial. Stacy talks about her mother's stage 4 uterine cancer diagnosis, which led to genetic testing that revealed a hereditary mutation called CDH1. This mutation increased the likelihood of cancer in Stacy and her siblings. Stacy describes the moment she discovered she was CDH1 positive, the challenges she faced afterward, and the lessons she learned through the clinical trial process. No longer having a stomach, Stacy has to eat more frequently to keep her energy up. Becoming a "professional snacker" led her to turn her newfound snacking habit into a business and Seahorse Snacks was born. Seahorse Snacks makes healthy delicious roasted nuts with unique and unusual flavors.To Connect with Stacy:Stacy MartinStacy@seahorsesnacks.comLinked In:https://www.linkedin.com/in/stacy-martin-461b33a/Seahorse Snacks:https://seahorsesnacks.com/Instagram: @seahorse_snacksTikTok: @seahorse_snacks

Featuring perspectives from Dr Kevin Kalinsky and Dr Heather McArthur, including the following topics: Introduction (0:00) Case: A woman in her mid 80s with a 2.7-cm residual tumor after neoadjuvant pembrolizumab/chemotherapy for localized triple-negative breast cancer (TNBC) — Ranju Gupta, MD (3:31) Question and Comments: Approach to neoadjuvant therapy and defining residual disease; PD-L1 status and efficacy of pembrolizumab in the localized and metastatic settings — Kapisthalam (KS) Kumar, MD (8:04) Case: A woman in her mid 60s with node-positive TNBC and a single lung metastasis who receives neoadjuvant therapy based on the KEYNOTE-522 trial — Dr Kumar (17:18) Case: A woman in her early 70s with localized TNBC and residual disease after poorly tolerated neoadjuvant pembrolizumab/chemotherapy and lumpectomy — Dr Kumar (23:29) Case: A woman in her late 60s with widely metastatic ER-negative, HER2-low disease after multiple lines of treatment — CDH1 and ERBB2-V697L mutations, microsatellite stable, tumor mutational burden 3 mut/Mb — Dr Gupta (29:13) Question and Comments: Adjuvant therapy selection for patients with localized TNBC with a BRCA mutation and residual disease; risk of acute myeloid leukemia/myelodysplastic syndromes associated with PARP inhibitor therapy — Dr Kumar (40:52) Case: A woman in her early 70s who develops recurrent metastatic ER-negative, HER2-low breast cancer after nab paclitaxel/atezolizumab and receives sacituzumab govitecan — Dr Gupta (46:49) CME information and select publications

Professor Parry Guilford is known for successfully in identifying the first known genetic mutations in the CDH1 gene, leading to the description of a new cancer syndrome Hereditary Diffuse Gastric Cancer (HDGC). This discovery has conservatively saved 27,000 people from developing a severe form of stomach cancer. Parry is determined to continue to change the course of HDGC stomach cancer patients outcomes, he is invested in the CDH1 mutation families and feels their trials as if they were his own. We discuss genetic counselling, the age at which we test our children for hereditary cancers, his work on lobular breast cancer, bowel cancer and funding research. 

This episode is hosted by Josie Baker, MS, LGC, and features Jeremy Davis, MD, a National Cancer Institute (NIH) surgical oncologist.Together, they discuss Dr. Davis' recent article published in the Journal of Medical Genetics  titled “Decision-making and regret in patients with germline CDH1 variants undergoing prophylactic total gastrectomy.”This podcast was released during  Patient Experience Week.   Read our blog post to learn more about this podcast HERE

Dr. Shannon Westin and her guests, Dr. Jeremy Davis and patient advocate Kathryn Carr, discuss the paper "Costs of Cancer Prevention: Physical and Psychosocial Sequelae of Risk-Reducing Total Gastrectomy" recently published and printed in the JCO. TRANSCRIPT Shannon Westin: Hello, everyone, and welcome to another episode of JCO After Hours, the podcast where we get in depth on manuscripts that are published in the Journal of Clinical Oncology. I am your host, Shannon Westin, a professor of GYN Oncology at MD Anderson, and the JCO social media editor. I am so thrilled to have wonderful authors here today who do not have any conflicts of interest. We are going to be discussing the “Costs of Cancer Prevention: Physical and Psychosocial Sequelae of Risk-Reducing Total Gastrectomy.” This was published in the Journal of Clinical Oncology online on October 30, 2023, and in print on February 1st, 2024.  And I am excited. I am accompanied by the lead author, Dr. Jeremy Davis, who is an Associate Professor and Surgical Oncologist at the NIH, National Cancer Institute Intramural Research Program. Welcome, Dr. Davis.  Dr. Jeremy Davis: Thank you. Shannon Westin: If it is okay with you, I'll call you Jeremy. Dr. Jeremy Davis: Yes, please.  Shannon Westin: Fabulous. We also have patient advocate Kathryn Carr, who is a board member for No Stomach for Cancer. Welcome, Kathryn. Kathryn Carr: Thank you so much.  Shannon Westin: So let's get right into it. I think this is really thought-provoking work. First, I'd love to level set. So this was work around hereditary diffuse gastric cancer syndrome. Can we get a little bit of information about what causes this and how common it is? Dr. Jeremy Davis: So, hereditary diffuse gastric cancer syndrome, also referred to as the diffuse gastric cancer and lobular breast cancer syndrome, is basically early-onset diffuse gastric cancer and in women, lobular type breast cancer attributed to germline mutations in the CDH1 gene. If we look at all cases of gastric cancer in the United States, only about 1-3% may be considered hereditary in nature. But when we do study hereditary causes of cancer, it is by far the most common one that we are aware of. Shannon Westin: What is the likelihood that someone who is a carrier of a germline CDH1 variant will develop gastric cancer? Dr. Jeremy Davis: That's a good question. Early on, when the syndrome was first described, the estimates of cancer risk were quite high, probably upwards of 70-80%. The good news is that more current estimates published in the last few years suggest that that risk in a lifetime is probably in the 25-40% range. It's interesting, we do have our own data that are under review right now, where in some families where there's no history of stomach cancer, that risk of stomach cancer in a lifetime getting a CDH1 mutation might be as low as 10%. So I think the takeaway is that there's clearly a spectrum and that spectrum of risk is probably based on factors that we don't quite yet understand. Shannon Westin: What are the options for management of this hereditary syndrome, really focusing on the gastric cancer syndrome portion today? How good does it do to reduce the risk? Dr. Jeremy Davis: The options are really two. One is probably the prevailing recommendation that most people would be aware of, is to prophylactically remove the stomach, and we choose to use the term most often ‘risk-reducing gastrectomy', but to remove the entire stomach and really eliminate the risk of cancer from ever developing. The other option is enhanced surveillance, and people might think of this as akin to other high risk cancer syndromes. But for this we would do yearly or annual endoscopic surveillance. Many people think that that may not be the best option, but it is certainly an option. We discussed some of that in the paper about what are the risks and benefits of gastrectomy, and then what may be the benefit of enhanced surveillance for some people. Shannon Westin: Well, I would love to hear Kathryn. I think this is a perfect opportunity to hear a little bit about your journey with carrying this variant, as much as you are willing to share with our listeners. Kathryn Carr: Yeah, absolutely. So I found out that I have this spicy little gene back in 2019. My whole family got tested so the gene comes down from my paternal great grandmother. There are five of us who actually all had our stomachs removed by Dr. Davis. Within a year, he had five Carr stomachs. For me when I found out, I was extremely overwhelmed. I mean, “You want to take my stomach out? Like, what do you mean?” But after talking to Dr. Davis and his entire care team, I knew for me, having the total gastrectomy was the only option simply because I know my personality type enough that I was not going to be able to move forward with life unless I got rid of this overwhelming worry. Shannon Westin: Yeah, I think that makes sense. I'm a GYN oncologist by trade, so I often reference all things surgery around that. We have the same thing when we talk about risk-reducing surgeries for endometrial and ovarian cancers. This seems more like what we do in Lynch syndrome, where patients are at risk for endometrial cancer. Removal of the uterus is almost definitive in its ability to reduce that risk, but it's obviously a very large surgery. Jeremy, can you review the gastrectomy in general? What are the most common short-term and long-term adverse events? What did you have to discuss with Kathryn and her five family members around what they could expect from this surgery? Dr. Jeremy Davis: Yeah, I think this is a great question because it's the thing at the top of most patients' minds. When I sit down to talk to somebody about gastrectomy, usually a lot of the conversation initially centers around ‘how long does the operation take, how long am I at the hospital, and what are the most likely risks of the operation?' The good news is that as operations go, it can be done in two to three hours, and most people are in the hospital for maybe five to seven days. The risks of this operation, however, at least during the operation or immediately afterward have to do with how we have to reconnect everything and reconnecting the intestine to the esophagus so that people can continue to eat. Because I think a lot of people wonder, "Well, how am I going to eat?” The stomach's gone, but we recreate intestinal continuity. We put things back together in a way that people can eat and absorb their food.  But that connection we make between the esophagus and intestine is almost like the Achilles heel of this operation. It's the one thing that keeps surgeons up at night, and it's probably the one thing that causes the most trouble in terms of immediate risks, like leaking. If that connection leaks, it can lead to infection. There are other aspects of the operation that relate to any kind of intestinal surgery, such as leakage, blockage, or narrowing or something like that. So these are the things you need to worry about in the short term. But you mentioned the long-term consequences, and that was really one of the reasons why we wrote the paper. If you look in the literature, the focus is on the acute problems, things that happen within 30, 60, or 90 days of the operation. Which, yes, those are very, very important. But since we're talking about an operation that's supposed to prevent cancer and therefore allow the patient to live a long and happy life, I think it's important for us to think about what happens well beyond the time that the patient essentially heals from the operation.  Shannon Westin: It's so critical. And I think before we go into the work that you did and what you all found, Kathryn, I would love to get your perspective. Having gone through the procedure, what was your experience? Give us as little or as much detail as you want, whatever you're comfortable with. But also, what did you wish you had known? What surprises kind of came up during the course?  Kathryn Carr: I'm going to quote Rachel, who works with Dr. Davis at the NIH. She's the clinical dietitian. And my question to her was, "Seeing all the patients you've seen and knowing all that you know, what would be the advice that you would give me?" She told me to have the patience to get through the first year. I think that really set my expectation of, "Okay, this is not just a surgery where in a week or two weeks I'm going to be up skipping along." It is a marathon. I really worked hard with Dr. Davis in the hospital. I'm allergic to everything. I was convinced that my spleen was erupting. I think I scared many fellows, and they were like, "That's actually not where your spleen is. It's fine. You're okay. Stop getting on WebMD." But once I got home, those first eight weeks, they're hard. There were several moments where I would just sit and stare off into space and think, "Oh my gosh, what have I done?" But for me when Dr. Davis called to tell me the pathology report and that they did find some signet cells, I was 100% sure that I made the right decision. I would have been worried every second of every day that my body was going to turn on me. So once I kind of had that relief, it was like, "Okay, my body can do this. We're built to do hard things." Then it was just getting through the first six months, learning what I could eat, what I couldn't eat, working with Rachel on different strategies of, “Okay, I'm going to maximize my protein in the morning and then maybe get a little more adventurous as the day goes on.” But what I wish I had known before surgery, because I'm a planner, I want everything scheduled and figured out. I was in the hospital, I had a different outfit for every day, and I just wanted it to go perfectly. I think taking away the expectations of what your journey is going to look like would be the best advice I could go back and give myself. Because I am very competitive, and my dad and I were separated by seven months of this surgery. He can do things that I still can't do, and that's okay. Everyone's healing journey is going to look very different because everybody is going to respond incredibly different. It's like the body is doing roll call and the stomach is nowhere to be found, and everybody is going to respond totally differently to that. Shannon Westin: That's so insightful. I really appreciate that.  I guess now it's a good time to turn to the work that you did, Jeremy, and you kind of already hinted at what your objectives were, but can you maybe walk through your primary objectives in the way you designed the study. Dr. Jeremy Davis: You know, I think as somebody who trained to take care of people with cancer and do big operations to cure people, this was a little bit of a different experience in the beginning for me. Because here I was taking ostensibly normal people - Kathryn may argue with that statement - but normal people, and I was going to take them to the operating room and do something to them to prevent a problem. And this is not a minor thing, it's a big deal. What I learned pretty quickly was how much I was disrupting people's lives. And what I mean by that is that a patient comes to clinic three or six months after surgery. We all document the typical things. They are healing well, they are recovering as expected, their incisions are healed and all this stuff. But it was the stuff that didn't always go down in the medical record. The comments that the patients made to my team, the nurses, the dietitian, about how their lives were being disrupted. And this started to change my viewpoint on, “Oh my goodness, we're paying attention to important things, but we're really not paying attention to what's happening.” So, the idea behind the study was really to explore those consequences that don't get talked about a lot. That was the nature of the idea behind the study. It was easy enough for us to conduct the study because my research at the NIH is about gastric cancer, but more specifically, this hereditary form of gastric cancer. We have a natural history study that allows us to follow people for a long time, not just within three or six months of surgery, and then we're done. So that longitudinal aspect of the study is really what allowed us to accomplish that. Shannon Westin: What I thought was really interesting here is how many different types of questionnaires you were able to utilize to really assess beyond kind of the straightforward quality of life Yes/No. Can you speak a little bit about some of the questionnaires you chose and why?  Dr. Jeremy Davis: My concern going into this was that I had read a lot of the literature related to quality of life after gastrectomy for gastric cancer. There are certainly these validated questionnaires out there. And my sense was, having read those questions and papers, that those validated typical questionnaires- I'm referring to the FACT-G or the FACT-Ga might not capture the things that we wanted to capture. So, I spoke to our palliative care service here at the NIH clinical center, which is the hospital here on campus in Bethesda. They had developed a questionnaire many years ago that they called the NIH HEALS or Healing Experience of All Life Stressors. They designed that to identify stress causing changes associated with chronic illness. You might argue that having a germline mutation that puts you at risk for cancer is kind of a chronic condition. So, we thought we would use that.  And then the last part was we just sat around the table and we thought, “Well, jeez, what are all these things that people are telling us that would never be captured in almost any questionnaire?” And that's when we designed a series of questions that we thought were relevant to our patient population because we wanted to capture all the things that people had told us. Those were things like, “I had to change my job because I couldn't do the same work anymore, right?” Or, “My partner, our relationship changed substantially, and we grew apart, and we ultimately got divorced.” How do you capture that? So that's how we designed it. We basically looked at all the patients that we had done the prophylactic gastrectomy on and applied all of those validated and unvalidated questionnaires. Shannon Westin: That's so great. And I bet, Kathryn, you participated quite a bit in that, in addition to other people in the study. Kathryn Carr: I did, and I'm so grateful that Dr. Davis is doing this study because it is so important to look at what life is like without a stomach. You have this immediate thought of, “Okay, I just want to save my life. I want to make my life longer. But how is it going to change my life? How is it going to alter my day-to-day?” Because even Dr. Davis has said it would be weird if it didn't change your life. I mean, you're taking away a very important piece of the puzzle. So, I think this study is going to help people make more accurate decisions. I don't doubt my decision to have my gastrectomy at all, but this is beautiful information just so that you can be more well-prepared to walk into the surgery of, “Okay, now I have a very clear understanding of what my life could look like.” I've been very fortunate that I have not had a lot of the physical problems. I don't deal with a lot of bile reflux. My weight has stabilized, so I am very blessed in that way. But emotionally, this has been a really tough surgery. You start to feel misunderstood, like you have to walk into every day being very prepared of, “Okay, every two hours I have to eat something or else I get real hangry, not just a little hungry, real hangry. Also, my body will start to shake.” That's how I get my hunger signal. My whole body will start shaking, which is very scary. It's very unpleasant. I'm almost four years post-op, and so I lean into my schedule and routine.  One piece of advice for anyone walking into this surgery is to make sure you're anchored in something. For me, my faith anchors me, but if you're not anchored in something that is secure and true, like, you are going to float away, because this is a storm.  Shannon Westin: Jeremy, do you want to just pass on a few of the key findings? I encourage everyone to read the paper. There are so many different things that were explored and identified as part of this study. It's amazing with the number of patients that were involved, what the depth of the findings was. But perhaps you can kind of hit some of the major high points. Dr. Jeremy Davis: Yeah, I think the key takeaways for me, and obviously I'm still learning from all of this, is that I think we talk a lot about the surgery, in this case especially, but we don't talk enough about what life is like afterwards. I've started to talk to people about how much you think your stomach plays a role in your life, and you think about how much of our life centers around eating and drinking and holidays and family gatherings. And you have to imagine that means those activities are potentially disrupted. So for me, the key takeaways from this are, number one, we have to be aware. We have to be aware that risk reducing surgery of almost any kind has consequences. Yes, we want it to have a positive impact on the patient, but we have got to be aware of the negative impact. This is like systemic chemotherapy. It can do a lot of good, but toxicities are real. In terms of the specific findings from this study, listen, 94% of people in the study, 126 of people, 94% had some long term consequence. And it wasn't just like some long term, “Oh, I don't like my scar.” No, it was 94% of people had a long term problem, such as “I have daily bile reflux that interferes with my activities of daily living.” Something like that.   And I think the range of consequences is really important, too. And so, again, they range from things like GI symptoms, which you would imagine would be quite typical for a gastrectomy, but mental health, right? People talking about worsening symptoms of anxiety or depression, some substance abuse. Whether it was alcohol or otherwise, disruptions in relationships, I mentioned earlier, and even occupation change. I can't physically do the job that I used to do. So I think as clinicians, as surgeons that walk into this, yes, we need to focus on the surgery and the immediate consequences, but we also need to think, “How am I going to change this person's life? Not just for the better, but how might I really impair their life in the long term?” Kathryn Carr: Well, in one, just very simple example. So like going out to eat with people. There's a natural cadence of conversation. I take a bite, you talk and vice versa. But when you're chewing your food to the nth degree it interrupts that natural cadence. I avoid dinner dates because then I have to talk about my stomach on a first date or going out to dinner with friends. It's nice if there's a group of us because then other people can carry the cadence but then you kind of feel left out of the conversation because you're like, “Oh, well. I've got to eat, otherwise I'm going to pass out.” So that's just like a very simple, you wouldn't think of, “Okay, I'm going to dinner at 7:30 so I should probably eat a snack before I go because I might not get my food until 8:00 or 8:30.” So it's just like you're constantly thinking about, “Okay, I've got to make sure that I have food in my body.  Shannon Westin: It's so critical.  Well, this has been an awesome discussion and I'm sad that it's coming to a close. I guess just final thoughts around what's next in this space. Like what are you working on now, Jeremy? Dr. Jeremy Davis: I'm a cancer surgeon and a cancer researcher so my goal is to find a way for us to prevent stomach cancer that doesn't require me having to take out somebody's stomach. So in the laboratory that's what we're doing, right? We're working on finding a way to prevent stomach cancer so that I don't have to do this operation anymore. But on the clinical side of things, the next thing that we're exploring is how do patients think about, talk about, or express concerns to their physicians about reproduction - reproduction in the setting of a cancer predisposition syndrome. And I think that's going to be really important work.  Shannon Westin: That's great. Kathryn, any thoughts? Kathryn Carr: I know that being four years out, I'm not like an old timer, but I do just want to help anyone who's at the beginning stages of this journey and just making other patients feel less alone. I told Dr. Davis I just entered the world of TikTok to talk about gastrectomy and just opening up a conversation of what does life without a stomach look like? And just making people feel less alone and more understood throughout this process. Shannon Westin: Thank you both for the work you're doing, and thank you to all of our listeners for tuning in to JCO After Hours. Again, we were discussing the “Costs of Cancer Prevention: Physical and Psychosocial Sequelae of Risk-Reducing Total Gastrectomy.” Please do not be a stranger to our podcast. Check out our other offerings and reach out to us on X and Instagram if you have other topics you want us to cover. Have an awesome day. The purpose of this podcast is to educate and 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. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement.     

Today we have a very special guest with a very special topic. We are honoured to have Jordan Ricks as a part of our show as she is such an amazing person who has a story that is just one big miracle. After falling pregnant, Jordan found that she started to vomit and get sick, which at first seemed normal, but eventually it grew to be completely out of control. She has a mutation in her DNA called CDH1 that causes her to be more prone to stomach and breast cancer, so when she let the doctors know she had this gene, a grave look crossed their faces and they discovered some terrible news. Jordan was in complete sorrow, but had this voice come to her that she was going to go through something similar to her dad, which would get her through this. “You knew this was coming. You've been prepared for this. Now go and be a miracle.”About Jordan and her genetic mutation 1:00Finding the cancer 9:40The cancer doesn't define who she is 21:00Having to share the trial with her child 26:00Her experience has helped her help others 33:00If you are going through the darkest of times 39:30“All 4 of the doctors came back and they all looked at me solemn and sad, and I was like ‘What's going on?' Then Dr. Ott, my surgeon, was the one who broke the news and told me ‘You are stage 4 with signet ring gastric cancer due to your CDH1 mutation.' There I was, 29 years old, 6 months pregnant, sitting in the hospital with bad news. It was so shocking to my system.” 10:55https://www.facebook.com/theirishmummy/https://www.instagram.com/the_irish_mummy/Pick up a copy of Journal to Joy. My NEW 90 Day Goals, Gratitude & Affirmation Journal to Create a Happy & Abundant Life.https://www.theirishmummy.com/Subscribe to Letters to My Sisters Newsletter. You will hear EVERYTHING here first.https://www.theirishmummy.com/

ASCO: You're listening to a podcast from Cancer.Net. This cancer information website is produced by the American Society of Clinical Oncology, known as ASCO, the voice of the world's oncology professionals. 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. Guests' statements on this podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Cancer research discussed in this podcast is ongoing, so data described here may change as research progresses. In this podcast, Dr. Allison Kurian and genetic counselor Kristen Mahoney Shannon talk about what people should know about genetic testing and hereditary breast cancer, including what to expect when meeting with a genetic counselor, ways to reduce your risk of developing cancer, and talking about genetic test results with family.  Dr. Kurian is a Professor of Medicine and of Epidemiology and Population Health at Stanford University School of Medicine, and Director of the Stanford Women's Clinical Cancer Genetics Program. She is also the 2023 Cancer.Net Specialty Editor for Breast Cancer. Ms. Shannon is a senior genetic counselor and Director of the Cancer Center Genetics Program and Director of Genetic Counseling for the Massachusetts General Hospital Department of Medicine. She is also a 2023 Cancer.Net Advisory Panelist. View disclosures for Dr. Kurian and Ms. Shannon at Cancer.Net. Dr. Allison Kurian: I'm Allison Kurian. I am a professor of medicine, oncology, and epidemiology and population health at Stanford University. And I am speaking today with my colleague, Kristen Shannon, who will introduce herself. Kristen Shannon: Hi, it's great to be here. My name is Kristen Shannon. I am a genetic counselor and the director of cancer genetics at Massachusetts General Hospital in Boston. And I have no financial relevant disclosures to report. Dr. Allison Kurian: Thank you, and I have no relevant financial disclosures either. Very good. So today we will be talking about breast cancer and inherited risk and genetic testing. And let me start by providing a definition of a genetic or hereditary condition. So the way we think about this is something that has a high risk for developing a disease, not a certainty, but a high risk, and runs in families, generally because of a genetic finding that we can identify. And that typically is identified through sequencing, testing of blood or saliva samples, and typically allows us to find a change that we know is clearly associated with disease. A good example for breast cancer are the genes BRCA1 and BRCA2, which some may have heard of, and we will talk about further. So that is just an example, and we will get into more of the details of this as we go on. But I think the point is something that runs in families often is seen with the trait, so for BRCA1 or BRCA2, that would be breast cancer or ovarian cancer, affecting people in every generation. And having what we call for these kinds of genes an autosomal dominant inheritance pattern, so inherited from either parent. And taking only 1 copy that is not functioning to give a person higher risk of the condition. So that's sort of a bit of the basics here on genetic or hereditary risk. And just to give a sense of how common hereditary breast cancer is, we think that in general this may account for, I would say, somewhere between 5% to perhaps 10% of cases of breast cancer. And Kristen, please jump in and tell me if you think differently. But that would be my ballpark. And I think probably the majority of those are the BRCA1 and BRCA2 genes that I mentioned, although there are others that we are recognizing are playing more of a role than we thought, and we'll discuss those, too. So let me give you a chance to continue and respond, Kristen. Kristen Shannon: Yeah, no, I totally agree. And I was thinking that maybe I could talk a little bit about some of the features that are suggestive that there could be one of these inherited breast cancers in the family, because recognizing these signs of hereditary breast cancer can be super important for early detection and prevention of breast cancer. So first, multiple cases of breast cancer within the family, especially among close relatives like parents, siblings, children, those can be a sign that the cancer is inherited. Another important sign is early age of onset of disease. So breast cancer diagnosed at a young age, typically before the age of 50, might point towards hereditary risk. And it's not always the case, but it's something to be aware of. Also, if there is a history of ovarian cancer in the family, especially if you see it in conjunction with breast cancer cases, that's a significant sign that there could be something inherited in the family. And while it's rarer, male breast cancer can also be associated with hereditary gene mutations. So if there's a history of male breast cancer in the family, it's definitely something to think about in terms of hereditary risk. Multiple cancer types in the family can also be another clue. It's not always just breast and ovarian cancer. If you see a family history of both breast and ovarian cancer or pancreatic cancer or prostate cancer within the same family, that also might be a sign of an inherited cancer syndrome. For individuals of Ashkenazi Jewish descent, it's worth noting that they have a higher prevalence of certain gene mutations in specific genes, specifically BRCA1 and BRCA2, which Dr. Kurian has mentioned before. So a family of history of breast or ovarian cancer in an Ashkenazi Jewish individual should be noted as a higher sign that this cancer could be due to an inherited gene. And lastly, if someone has had breast cancer in both breasts, that's called bilateral breast cancer, and that might indicate hereditary risk. It's important, though, to remember that it's not just about any single sign in isolation. You really need to take a look at the bigger picture and the bigger context of the family. So if you notice any of these signs in your family, it's a good idea to seek guidance from a health care professional, like a genetic counselor or a medical oncologist, and they can help assess the family's risk and recommend genetic testing if needed. Dr. Kurian, did I forget anything or leave anything off? Dr. Allison Kurian: Perfect as always. I will just add a little bit here in terms of the specific gene names that we think about, because sometimes it helps people to have sort of a list in their minds, not that we expect you to remember the whole alphabet soup of these different genes. And let me just say that I think it's always a bit of a hodgepodge, some of these names. I used to wonder how people come up with these names, and often there's a bit of a history there. But I will just go through a few of them. We now have some practice guidelines, and they are basically put together by a group of experts who review all the evidence frequently and come up with recommendations. And so there is a list in these guidelines of basically which genes we think are appropriate to test for breast cancer in families, because there's enough evidence to suggest that. And so in addition to BRCA1 and BRCA2, the ones that I think of as the most important, and I'll want to hear Kristen's thoughts about this, too, but the ones that we see most often are called ATM. Sounds like a cash machine, unfortunately not, but ATM. CHEK2, C-H-E-K-2, and then one called PALB2, which stands for Partner and Localizer of BRCA2, and is a lot like BRCA2 in its risks. There are some other genes that give breast cancer risks that are less common. One of them, CDH1, is a gene that also causes an increased risk of stomach cancer. There are a few others that we always keep in mind. There's one called PTEN that's very rare that causes a syndrome called Cowden syndrome that I certainly haven't seen much of. Kristen may have seen more, but it's not something we see often and goes with a lot of other features in families. There are 2 genes that I think we recognize more in recent years and like to be sure we test, called RAD51C and RAD51D, and those both give increased risks. And then another one that I always think of as important here is TP53, and that is a gene that causes something called Li-Fraumeni syndrome, which has probably the highest cancer risks of which we know. There's another one, STK11, that gives some risk, NF1. We see these as being less frequent contributors. Those are the ones that I kind of keep in mind. And again, there will not be a quiz on the alphabet soup, but just so you're aware of what kinds of names you might hear. Kristen, please jump in if I've forgotten any or anything else you want to say. Kristen Shannon: No, I think that that's important. I think the only thing that I would add is that some people think when they go in for breast cancer genetic testing, they only are getting the BRCA1 and BRCA2 gene. And it's just important for people to realize that that's not really a complete test at this point, as you mentioned, Dr. Kurian. Dr. Allison Kurian: Totally agree, and thank you. Kristen Shannon: Should we move into how to prepare for a genetic counseling appointment? Dr. Allison Kurian: Please, yes. Kristen Shannon: Sure, okay. So preparing for a genetic counseling appointment for breast cancer risk can be helpful. First and foremost, we suggest that you gather your family health history. So reach out to your relatives and compile as much information as possible about your family's health background. Pay special attention to any instances of breast cancer and ovarian cancer, prostate cancer, pancreatic cancer in the family. And if any family members have had genetic testing, it's really helpful to jot down those test results as well and bring them with you to the appointment. The other thing is to think about your own personal medical history. You know, think about if you've had any past diagnosis, any treatments, surgeries, or medical conditions, especially those related to breast cancer, your genetic counseling appointment will include a discussion of those. The other thing is, you know, if you've had any medical tests related to cancer, it's important to gather those records if they're not already in your hospital's medical record system that you are going to. Another good idea is to just prepare a list of questions that you might want to have answered. So what do you want to know? Are there specific concerns or specific things you're curious about? It's also important to understand what you want to get out of this genetic counseling encounter. Do you want to just clarify your risk of having a gene? Do you want to consider genetic testing? Or do you want to talk about just managing your risk for breast cancer? That's super important to have that in mind before you actually go into your appointment. Lastly, I would consider bringing along a person, a supportive person with you to the appointment. Having someone with you can help provide emotional support because sometimes these visits can get emotionally charged, but it also can help to have someone remember important details that you will discuss with your health care provider. So it's really important to just arm yourself with information, questions, and support so that the appointment is as productive and informative as it can be. Do you have anything else you'd like to add, Dr. Kurian? Dr. Allison Kurian: It's wonderful to have your expert perspective on this. And I guess any thoughts about really what's inside the box? I think sometimes people just sort of wonder what's going to happen when I go in that room. Sometimes we have patients come in and say, “What are you guys going to do to me? Will there be surgery done?” And we reassure them that we are not doing anything that wild. And so maybe just a sense of kind of walking people through what will happen when they go to meet with genetic counselors. Kristen Shannon: Absolutely, thanks for bringing that up. So during the initial meeting, first you'll probably discuss your personal health history, again, any past diagnoses, surgeries, medical conditions. And then typically a genetic counselor or a medical professional will dive right into your family health history. So they'll ask a whole bunch of questions about your close and extended family members to build a really comprehensive picture of your family and the cancer diagnosis in it. They'll want to know if anyone in your family has had cancer, and they'll also want to know what type of cancer that person has had and also the age at which that person was diagnosed. So those are the 3 pieces of information that your health care provider will want to get from you. The genetic counselor will also probably ask you about what you want to get out of this encounter to make sure that you're both on the same page. Again, do you want genetic testing? You know that already. Or do you want to just talk through the process? So the big part of the initial meeting is really education. The genetic counselor will explain what Dr. Kurian described at the very outset of this discussion, what's the genetic basis of hereditary breast cancer, including all the specific genes that Dr. Kurian—the alphabet soup that we talked about. Talk about inheritance patterns and the implications of having a genetic mutation. The genetic counselor will probably also first assess your risk of having a mutation in one of the genes, and then they'll also talk to you often about genetic testing. So if genetic testing is on the table and you and the genetic counselor both agree that it's a good step, they'll walk you through the process of informed consent. And so this ensures that you understand what the testing entails, the potential outcomes, the implications of the test results. And then if you decide to go through with genetic testing, you will provide a blood or a saliva sample. And then it's a waiting game because these test results can take several weeks, usually about 3 to 4 weeks to get the test results back. When the test results come back, you'll typically have a follow-up appointment, either in-person or on the phone with your genetic counselor. And that's when they spend a lot of time interpreting the test results, explain what they mean for you and your health, as well as discussing the appropriate risk management strategies, if necessary. And if a gene mutation is identified, a genetic counselor will guide you on how to manage these risks. But it will depend on the specific mutation that is identified. And then the other thing that the genetic counselor can help with is just the emotional support. Some people have a harder time than others hearing this information. And also to talk about how to tell your family members about this. So in a nutshell, the initial meeting with the genetic counselor is about gathering information, assessing risk, and potentially deciding on whether or not you're going to have genetic testing. And then after that step, it's about interpreting the test results, talking about next steps, and providing emotional support. Dr. Allison Kurian: Thank you, Kristen. That was wonderful and very complete. And as I was listening to you, first of all, I was thinking about my general admiration for genetic counselors, which is huge. They taught me everything I know about this field. But so also kind of highlighting the key things that a meeting with a genetic counselor will do for you, as you so nicely did. And I think it's getting the right test ordered, making sure that the results make sense to you, and going beyond the patient. But I think those are sort of the key aspects that you communicated really well of the things that we want to get done there. Kristen Shannon: Well said, well said. And I couldn't agree more. Dr. Allison Kurian: And what do you think about the family part in terms of how that gets done? Kristen Shannon: Right, so discussing your genetic test results with family members can be hard and challenging, but it's really, really important. In terms of talking to your family members, I think first, determine the way you're going to notify your family members. So are you going to talk to them? Are you going to send them a letter or an email? And how you share the information may be different based on your relationship with that person. So for example, you may sit down over coffee with a close family member to talk about your test results, but you may choose to write a letter to someone that you don't have that much contact with. The next thing that I think is really important is to be prepared. So before you even start to have this conversation, make sure that you have a clear understanding of your genetic test results, the implications to you and to the family member. That's super important before you even start to have the conversation so that you can explain things to people in simple terms without too much medical jargon and make sure you keep it straightforward. It's really helpful to have a copy of your genetic test results and to provide that to your relatives if you're comfortable doing so, because then they can take that information with them to their genetic counseling or genetic testing appointment, which can be incredibly essential in terms of making sure that they get the correct test at the right time and the test results are interpreted correctly. The only other suggestion I have is just to keep in mind that family members are going to react very differently to this information. And some people will be very matter of fact about it. Some people might get a little distracted by this whole thing. So just to be patient with people and keep the conversation open. Allow them to call you if you're willing to do that so that the conversation can develop over time because, you know, really, in the end, the goal is to make sure that everyone in the family is well informed and makes decisions based on their own health and their well-being. Dr. Allison Kurian: Thank you. I couldn't agree more. And we sometimes, as people may have heard, call this “cascade genetic testing.” So a patient is tested. Somebody who's already had cancer maybe is tested. But then we have the opportunity to have this cascade of beneficial genetic testing, where we can get to people before they have cancer and work on prevention and screening, which I'll talk about in a minute. And I will say that, in general, we here in the United States, and certainly other places as well, don't do as well as we would like with cascade testing despite all best efforts of everyone. And so just to emphasize that family notification is super important, genetic counselors are wonderful at helping people to do that. And I think also additional strategies and interventions are underway to try to help make that easier. So if I may, I'll talk just a little bit about kind of what we do when we find something. Is that okay to do? Kristen Shannon: That sounds great. Talk about people, you know, what they can do about their test results. Dr. Allison Kurian: Good. Yeah, so I always think that's important. I'm an oncologist by training. I'm not a geneticist. And again, it's only thanks to the brilliance of genetic counselors like Kristen that I have learned what I have for the last 2 decades working in the field. But so I tend to think in terms of what can we do to treat this person differently if they have cancer to prevent or reduce the risk of a future cancer. And so what I would say is increasingly over the last few years for a person with breast cancer, as well as some additional cancers, it started to matter what these results are in terms of how we treat the person, whether we might give different medications. And that's really exciting because for years in this field, we didn't have that, and now we do. And so the drugs that are increasingly important are called PARP, P-A-R-P, inhibitors. And sometimes, if a person has a BRCA1 or BRCA2 gene mutation, we might even offer those drugs to treat a breast cancer or, in other cases, ovarian, prostate, or pancreatic cancer. So I think the testing can matter like never before in terms of what we might do to take care of people's cancer. Sometimes we might also choose a different surgery. So sometimes a woman who has a diagnosis of breast cancer might choose to do a more extensive breast surgery, she might choose a double mastectomy to reduce her risk of getting a second breast cancer. That's never required. She certainly doesn't have to do so extensive a surgery if she doesn't choose, but it is an option that some people might choose. And there might also be other cancer risks to manage in somebody who had breast cancer. BRCA1 and BRCA2, for example, give a high risk of ovarian cancer. And so we might talk with someone about the possibility of removing ovaries to prevent an ovarian cancer, which often is recommended with BRCA1, BRCA2, and other such gene mutations. I will say that I think for somebody who hasn't had cancer yet, or hopefully ever, particularly as we think about breast cancer, we're often thinking about intensive screening. So starting often earlier than a person would if she didn't have high risk and generally adding magnetic resonance imaging, MRI, to screening with mammogram alone. And that really is, I think, the cornerstone for women at high risk is adding that breast MRI screening. For pretty much all of the genes I mentioned, that would be clinically indicated and covered by insurance and important to do. MRI has no radiation, very effective at finding breast cancer early. So I think to summarize, it's really all about understanding risk based on a particular gene mutation, understanding if a different kind of treatment is needed for the cancer that a person has, understanding if any sort of preventive measure is needed for future cancer risk, and making sure that the screening we have for breast and for other cancers is appropriate to the level of risk. Anything to add there, Kristen? Kristen Shannon: No. No, I think that that's great. Dr. Allison Kurian: Absolutely. Yeah, so I think it's wonderful to have this opportunity to speak about the importance of genetic testing, which is I think more important than it ever has been at this time for the care of patients with breast cancer and their families. And so as we move into breast cancer awareness month, it's great to be able to talk about this. Thanks so much. Kristen Shannon: Thank you so much. I agree. And if you have any questions, I would suggest you reach out to your doctor or look up on the ASCO website for a referral to a genetic counselor. ASCO: Thank you, Dr. Kurian and Ms. Shannon. Learn more about hereditary breast cancer and genetic testing at www.cancer.net/hboc. Cancer.Net Podcasts feature trusted, timely, and compassionate information for people with cancer, survivors, and their families and loved ones. Subscribe wherever you listen to podcasts for expert information and tips on coping with cancer, recaps of the latest research advances, and thoughtful discussions on cancer care. And check out other ASCO Podcasts to hear the latest interviews and insights from thought leaders, innovators, experts, and pioneers in oncology. Cancer.Net is supported by Conquer Cancer, the ASCO Foundation, which funds lifesaving research for every type of cancer, helping people with cancer everywhere. To help fund Cancer.Net and programs like it, donate at CONQUER.ORG/Donate.

Link to bioRxiv paper: http://biorxiv.org/cgi/content/short/2023.04.25.538200v1?rss=1 Authors: Peng, Y., Zhang, Y., Fang, R., Jiang, H., Lan, G., Liu, Y., Nie, Z., Zhang, S.-D., Ma, Y., Yang, P., Wang, F., Ge, H.-H., Zhang, W.-D., Luo, C., Li, A., He, W. Abstract: Centromere protein A (CENP-A) is a centromere-specific protein that determines kinetochore positioning and the accuracy of chromosome segregation. Despite its recognized importance in maintaining mitotic fidelity, the molecular details of CENP-A regulation in mitosis are still obscure. We performed a structure-activity relationship (SAR) study of the cell cycle-arresting indole terpenoid mimic JP18 and identified two more potent analogues, (+)-6-Br-JP18 and (+)-6-Cl-JP18. Tubulin was identified as a potential protein target of these two halogenated analogues by using the drug affinity responsive target stability (DARTS) based method. X-ray crystallographic analysis determined that (+)-6-Br-JP18 and (+)-6-Cl-JP18 bind to the colchicine-binding site of beta-tubulin. We further found that treatment of cancer cells with microtubule-targeting agents (MTAs), including these two compounds, upregulated CENP-A by destabilizing Cdh1, an E3 ubiquitin ligase component. The mechanistic study revealed that Cdh1 mediates proteolysis of CENP-A in mitosis, specifying the role of Cdh1 in maintaining mitotic fidelity. Copy rights belong to original authors. Visit the link for more info Podcast created by Paper Player, LLC

A new research paper was published in Oncotarget's Volume 14 on March 11, 2023, entitled, “Genomic landscape of metastatic breast cancer (MBC) patients with methylthioadenosine phosphorylase (MTAP) loss.” Homozygous deletion of methylthioadenosine phosphorylase (MTAP) upregulates de novo synthesis of purine (DNSP) and increases the proliferation of neoplastic cells. This increases the sensitivity of breast cancer cells to DNSP inhibitors such as methotrexate, L-alanosine and pemetrexed. In their recent study, Maroun Bou Zerdan, Prashanth Ashok Kumar, Elio Haroun, Nimisha Srivastava, Jeffrey Ross, and Abirami Sivapiragasam from SUNY Upstate Medical University and Foundation Medicine, Inc. analyzed 7,301 metastatic breast cancer (MBC) patients that underwent hybrid-capture based comprehensive genomic profiling (CGP). “We provide one of the first large analyses of the spectrum of GA [genomic alterations] occurring in MTAP deleted MBC with the hope that this would enable identifying potential therapeutic agents in the future.” Tumor mutational burden (TMB) was determined on up to 1.1 Mb of sequenced DNA and microsatellite instability (MSI) was determined on 114 loci. Tumor cell PD-L1 expression was determined by IHC (Dako 22C3). 208 (2.84%) of MBC featured MTAP loss. MTAP loss patients were younger (p = 0.002) and were more frequently ER− (30% vs. 50%; p < 0.0001), triple negative (TNBC) (47% vs. 27%; p < 0.0001) and less frequently HER2+ (2% vs. 8%; p = 0.0001) than MTAP intact MBC. Lobular histology and CDH1 mutations were more frequent in MTAP intact (14%) than MTAP loss MBC (p < 0.0001). CDKN2A (100%) and CDKN2B (97%) loss (9p21 co-deletion) were significantly associated with MTAP loss (p < 0.0001). Likely associated with the increased TNBC cases, BRCA1 mutation was also more frequent in MTAP loss MBC (10% vs. 4%; p < 0.0001). As for immune checkpoint inhibitors biomarkers, higher TMB >20 mut/Mb levels in the MTAP intact MBC (p < 0.0001) and higher PD-L1 low expression (1–49% TPS) in the MTAP loss MTAP (p = 0.002) were observed. “MTAP loss in MBC has distinct clinical features with genomic alterations (GA) affecting both targeted and immunotherapies. Further efforts are necessary to identify alternative means of targeting PRMT5 and MTA2 in MTAP-ve cancers to benefit from the high-MTA environment of MTAP-deficient cancers.” Read the full research paper: DOI: https://doi.org/10.18632/oncotarget.28376 Correspondence to: Abirami Sivapiragasam - sivapira@upstate.edu Keywords: breast cancer, metastatic, MTAP loss About Oncotarget Oncotarget is a primarily oncology-focused, peer-reviewed, open access journal. Papers are published continuously within yearly volumes in their final and complete form, and then quickly released to Pubmed. On September 15, 2022, Oncotarget was accepted again for indexing by MEDLINE. Oncotarget is now indexed by Medline/PubMed and PMC/PubMed. To learn more about Oncotarget, please visit https://www.oncotarget.com and connect with us: SoundCloud - https://soundcloud.com/oncotarget Facebook - https://www.facebook.com/Oncotarget/ Twitter - 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/ Media Contact MEDIA@IMPACTJOURNALS.COM 18009220957

Courtney Zentz is Founder of the nation's leading pediatric sleep consulting agency, Tiny Transitions. A organization born from her own struggles as a new parent. As she stood to build this company and enjoy new motherhood, she was diagnosed with the CDH1 gene. A mutation of the CDH1 gene meant she was at risk for developing an aggressive form of stomach and breast cancer. Courtney had to make a decision as to what to do with this knowledge, and how it would impact her life. Courtney's story is one of hope, interceding on the negative news we often hear on repeat. Courtney shares a raw look behind the scenes of new motherhood and the journey after diagnosis with CDH1. Bringing us up to today, in tune with her “authentic self” and feeling truly connected to her joy. If you are holding something bigger than you right now and you are not sure what the future looks like, this episode is for you. - - - SHOW NOTES Library of free sleep coaching and education: https://tinytransitions.com/work_with_courtney/opt-in-courtney-zentz/ Free sleep evaluation - which can be scheduled here: https://TinyTransitions.as.me/schedule-a-call More about CDH1: https://www.pennmedicine.org/cancer/types-of-cancer/stomach-cancer/stomach-cancer-risks-prevention/cdh1-mutation-and-stomach-cancer-risk CONNECT WITH KRISTINA Share Your Story or Ask Your Questions: ⁠⁠⁠Kristina@andthenbewell.com⁠⁠⁠⁠ Follow Along: ⁠⁠⁠Podcast IG⁠⁠⁠ ⁠⁠⁠⁠⁠⁠⁠ // ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠LinkedIn⁠⁠ ⁠ Don't forget to subscribe, rate and review after your favorite episodes. --- Support this podcast: https://podcasters.spotify.com/pod/show/andthenbewell/support

Vadim Gushchin, MD, Brian Badgwell, MD, and Jeremy Davis, MD discuss the role and timing of preoperative treatments before cytoreduction and HIPEC for gastric cancer. The panelists offer useful tips on surgical management of gastric cancer patients with peritoneal carcinomatoses, such as how to decide on the extent of the surgery, whether patients with CDH1 mutation should be treated differently, and others.

FDA连续批准2个治疗胃肠道间质瘤的靶向药 Nature Review 肠易激综合征的中饮食疗法的循证医学证据和机制的见解Science子刊 生活方式和遗传因素使亚洲人易患胃癌阿伐普替尼（Avapritinib）胃肠道间质瘤（GIST）是胃肠道最常见的间叶细胞肿瘤，目前普遍认为是是由编码酪氨酸激酶受体蛋白基因（KIT）突变、或血小板源性生长因子受体 α（PDGFRα）基因激活突变所诱发。其中以KIT突变最常见，占80%；PDGFRα突变占10%，PDGFRα外显子18 D842V是最常见突变，与伊马替尼耐药相关；还有10%的患者缺少KIT或PDGFRα突变，称为野生型胃肠道间质瘤。阿伐普替尼（Avapritinib）是一种高效、选择性、口服生活性的KIT和PDGFRα抑制剂。2020年1月9日，FDA批准Avapritinib用于治疗经过基因检测确认的PDGFRα18外显子突变的不可切除（无法通过手术切除）或转移性（癌细胞扩散至身体其他部位）胃肠道间质瘤患者。《NAVIGATOR研究：阿伐普替尼治疗PDGFRα D842V基因突变的、晚期胃肠道间质瘤的研究》Lancet Oncology，2020年7月 (1)NAVIGATOR研究是一项两部分、开放标签、剂量递增和剂量扩大的1阶段研究。这篇文章对PDGFRA D842V突变的患者进行单独分析，并报道了研究结果。研究纳入无法手术切除的、胃肠道间质瘤患者，其中56人携带PDGFRα D842V突变，其中20位患者进入剂量递增组（即从30mg qd逐渐加量至最大耐受剂量），36位患者进入剂量扩大组（即使用最大耐受剂量）。最大耐受剂量为400mg qd，推荐剂量为300mg qd。中位随访15·9个月，在PDGFRα D842V突变的56名患者中，9%完全缓解，79%部分缓解。治疗相关严重不良反应最常见的是贫血。在30-400mg qd的剂量下，没有观察到药物毒性；600mg qd时，两名患者出现剂量相关的不良反应。结论：阿伐普替尼在晚期PDGFRα D842V突变的胃肠道间质肿瘤患者中具有初步的抗肿瘤活性。瑞普替尼（ripretinib） 瑞普替尼（ripretinib）是一种对广泛的KIT和PDGFRA基因突变激酶抑制剂。2020年5月，FDA批准瑞普替尼（ripretinib）用于晚期胃肠道间质瘤的四线治疗。《INVICTUS研究：瑞普替尼治疗晚期胃肠间质肿瘤的3期试验》Lancet Oncology，2020年7月 (2)这项双盲、随机、安慰剂对照的第三期研究中，纳入晚期、进展性胃肠间质肿瘤患者129人，既往均使用过伊马替尼、舒尼替尼和瑞格拉非尼在内的治疗。患者随机分入瑞普替尼 150mg qd或安慰剂组，随机分配到安慰剂组的患者在疾病进展时允许转到瑞普替尼组。双盲期，瑞普替尼组和安慰剂组的中位无进展生存期分别为6.3个月和1.0个月（风险比0.15，p < 0.0001）。最常见的严重不良反应包括脂肪酶升高、高血压、疲劳和低磷血症，两组发生率相似。结论：瑞普替尼显著提高晚期胃肠道间质瘤患者的无进展生存期。乙型肝炎急性和慢性乙型肝炎感染均刻有不同的临床表现。急性期，临床表现可从亚临床、或无黄疸型肝炎至黄疸型肝炎，有时还会出现爆发性肝炎（

FDA连续批准2个治疗胃肠道间质瘤的靶向药 Nature Review 肠易激综合征的中饮食疗法的循证医学证据和机制的见解Science子刊 生活方式和遗传因素使亚洲人易患胃癌阿伐普替尼（Avapritinib）胃肠道间质瘤（GIST）是胃肠道最常见的间叶细胞肿瘤，目前普遍认为是是由编码酪氨酸激酶受体蛋白基因（KIT）突变、或血小板源性生长因子受体 α（PDGFRα）基因激活突变所诱发。其中以KIT突变最常见，占80%；PDGFRα突变占10%，PDGFRα外显子18 D842V是最常见突变，与伊马替尼耐药相关；还有10%的患者缺少KIT或PDGFRα突变，称为野生型胃肠道间质瘤。阿伐普替尼（Avapritinib）是一种高效、选择性、口服生活性的KIT和PDGFRα抑制剂。2020年1月9日，FDA批准Avapritinib用于治疗经过基因检测确认的PDGFRα18外显子突变的不可切除（无法通过手术切除）或转移性（癌细胞扩散至身体其他部位）胃肠道间质瘤患者。《NAVIGATOR研究：阿伐普替尼治疗PDGFRα D842V基因突变的、晚期胃肠道间质瘤的研究》Lancet Oncology，2020年7月 (1)NAVIGATOR研究是一项两部分、开放标签、剂量递增和剂量扩大的1阶段研究。这篇文章对PDGFRA D842V突变的患者进行单独分析，并报道了研究结果。研究纳入无法手术切除的、胃肠道间质瘤患者，其中56人携带PDGFRα D842V突变，其中20位患者进入剂量递增组（即从30mg qd逐渐加量至最大耐受剂量），36位患者进入剂量扩大组（即使用最大耐受剂量）。最大耐受剂量为400mg qd，推荐剂量为300mg qd。中位随访15·9个月，在PDGFRα D842V突变的56名患者中，9%完全缓解，79%部分缓解。治疗相关严重不良反应最常见的是贫血。在30-400mg qd的剂量下，没有观察到药物毒性；600mg qd时，两名患者出现剂量相关的不良反应。结论：阿伐普替尼在晚期PDGFRα D842V突变的胃肠道间质肿瘤患者中具有初步的抗肿瘤活性。瑞普替尼（ripretinib） 瑞普替尼（ripretinib）是一种对广泛的KIT和PDGFRA基因突变激酶抑制剂。2020年5月，FDA批准瑞普替尼（ripretinib）用于晚期胃肠道间质瘤的四线治疗。《INVICTUS研究：瑞普替尼治疗晚期胃肠间质肿瘤的3期试验》Lancet Oncology，2020年7月 (2)这项双盲、随机、安慰剂对照的第三期研究中，纳入晚期、进展性胃肠间质肿瘤患者129人，既往均使用过伊马替尼、舒尼替尼和瑞格拉非尼在内的治疗。患者随机分入瑞普替尼 150mg qd或安慰剂组，随机分配到安慰剂组的患者在疾病进展时允许转到瑞普替尼组。双盲期，瑞普替尼组和安慰剂组的中位无进展生存期分别为6.3个月和1.0个月（风险比0.15，p < 0.0001）。最常见的严重不良反应包括脂肪酶升高、高血压、疲劳和低磷血症，两组发生率相似。结论：瑞普替尼显著提高晚期胃肠道间质瘤患者的无进展生存期。乙型肝炎急性和慢性乙型肝炎感染均刻有不同的临床表现。急性期，临床表现可从亚临床、或无黄疸型肝炎至黄疸型肝炎，有时还会出现爆发性肝炎（

Stan Walker has revealed he was told he had to be "less Māori" to be successful in Australia.The singer and actor, who first made a name for himself when he won Australian Idol in 2009, has climbed the charts on both sides of the Tasman and won eight New Zealand Music Awards since.But Walker, whose iwi are Tūhoe and Ngāti Tuwharetoa, said many different people in the industry in Australia - "old heads who come from the old world" - told him he had to change to be on a mainstream platform."The more Māori I was, the less appealing I was to record sales, to be sold, basically," he told Newstalk ZB's Jack Tame."I literally was told, 'I think you're being too brown' and 'you're not like them' - I am every part of who 'them' is."Walker said he "got tired" of being someone he wasn't and realised something had to change."It all just got me to a place of, what the hell am I doing? This is not me. I got here because I'm me, not because of what they want."He said when he came back to New Zealand to be a judge on The X Factor in 2013, that he realised he needed to do for himself what he was encouraging other young artists to do."I had to come back and find myself again, coming home and spending time with my nannies."Now he's fully embraced who he is, with his new single Bigger/Tua being released in both English and te reo Māori.Walker said the song was a tribute to his tūrangawaewae, with the music video featuring scenes from his marae.Walker said the song was written "for such a time as this"."Considering where the world is at in 2020, for me it's really solidified what my purpose is and who I am and where I'm going."Walker also spoke about his experience with lockdown, saying it was "one of the most incredible things" to ever happen to him."I got to learn about myself, there was a lot of mending of relationships in my life."I was forced to be still ... it was the most still I've ever been since I had cancer."Walker had his stomach removed in 2017 after he was diagnosed with cancer. He had a rare mutation of the CDH1 gene that runs in his family, and they had already lost 25 family members to the disease.He took several years out from touring and releasing music but this year he has released Bigger/Tua and a memoir is due out on October 8 titled Impossible: My Story, with HarperCollins New Zealand.Asked how embracing his cultural identity might affect his commercial success, he said "What sells better than the truth?""I'm unapologetically Māori. When people ask 'Are you a Kiwi, are you an Aussie?' I'm Māori, I live in both countries but I'm Māori."

This podcast summarizes and provides commentary on the recent article by Yadav et al. in which the authors demonstrate that expansion of the current NCCN guidelines for genetic testing in breast cancer patients to include all women diagnosed at or below the age of 65 markedly improves the sensitivity for detecting pathogenic germline variants without requiring the testing of all breast cancer patients.   TRANSCRIPT This JCO Podcast provides observations and commentary on the JCO article “Evaluation of Germline Genetic Testing Criteria in a Hospital-Based Series of Women with Breast Cancer” by Yadav et al. My name is Erin Cobain, and I am a Clinical Lecturer at the University of Michigan Rogel Cancer Center in Ann Arbor, Michigan United States. My oncologic specialty is breast cancer. In this study, the authors sought to determine the sensitivity and specificity of current genetic testing criteria for the detection of pathogenic germline variants in women with breast cancer. Current national comprehensive cancer network (NCCN) guideline criteria, updated in January 2020, recommend that genetic testing be offered to all women diagnosed with breast cancer at age 45 or younger, those diagnosed with triple negative breast cancer at age 60 or younger as well as those with family history of breast, ovarian, prostate or pancreatic cancer that meet specific criteria. In addition, any patient with Ashkenazi Jewish ancestry is recommended to undergo testing. This most recent update to the guidelines also incorporates a recommendation to offer testing to individuals who have a greater than 5% risk of having a BRCA1 or BRCA2 mutation by prior probability models such as Tyrer-Cuzick or BRCAPro who would not otherwise meet criteria.  Prior to the publication of the present study by Yadav and colleagues, several recent articles including those by Beitsch et al. and Yang et al. indicate that many patients with pathogenic or likely pathogenic germline variants in genes associated with hereditary breast and ovarian cancer syndromes are missed by current testing criteria. The Beitsch et al. study analyzed results from a prospective registry whereby patients with previously or newly diagnosed breast cancer were consented and underwent genetic testing with an 80-gene panel test. Approximately 1,000 patients were enrolled and approximately half met NCCN guideline criteria for genetic testing. Among the patients who met NCCN guideline criteria, 9.4% had a pathogenic or likely pathogenic variant identified. For those patients not meeting NCCN guideline criteria for testing, 7.9% had a pathogenic or likely pathogenic variant. This led the authors to conclude that nearly half of breast cancer patients with pathogenic germline variants would be missed by NCCN criteria. Similarly, Yang and colleagues examined a cohort of patients with personal or family history of breast or gynecologic cancer from a Medicare database undergoing genetic testing. Data from over 4,000 patients tested indicated that the rate of identifying a likely pathogenic or pathogenic germline variant was nearly identical in the cohorts that met NCCN guideline criteria for testing versus those that did not, with the rate of pathogenic germline variants being approximately 10% in both groups. Indeed, the results from these studies lead the American Society of Breast Surgeons to issue a recommendation in October 2019 that all patients with personal history of breast cancer undergo genetic testing. While this recommendation would undoubtedly identify more patients with genetic susceptibility to breast cancer and other malignancies, the implications of this recommendation must be considered. Large scale testing would more readily identify patients with moderate penetrance genes that are without established cancer risk reduction guidelines. More testing also leads to increased identification of variants of uncertain significance, presenting challenges both for patients and their providers attempting to best counsel individuals with an ambiguous result. Finally, inequities in access to testing and genetic counseling resources as well as increased healthcare costs that result from broad testing are of major concern. If cost of testing is not covered by insurance, paying out of pocket may not be feasible for many patients.  In the present study, Yadav and colleagues attempted to address some of these apprehensions regarding the adoption of widespread genetic testing in breast cancer patients. The investigators enrolled patients with personal history of breast cancer over a 16 year period of time into a registry and evaluated for pathogenic germline variants in 9 cancer predisposition genes, including ATM, BRCA1, BRCA2, CDH1, CHEK2, NF1, PALB2, PTEN, and TP53. These genes were selected because there are clear management recommendations in the NCCN guidelines when they are identified.  The authors found that among almost 4,000 women tested, those meeting current NCCN guideline criteria for testing (comprising 48% of the cohort) were more likely to harbor a pathogenic germline variant than those women who did not meet criteria. The rate of detection of pathogenic germline variants was 9% and 3.5% in these groups respectively. Despite the updated NCCN guideline criteria identifying patients with pathogenic germline variants more readily, there are undoubtedly still patients missed by these criteria. The authors conducted subsequent analysis to include all women diagnosed with breast cancer at age 65 or younger, which achieved 90% specificity for the 9 cancer predisposition genes selected and greater than 98% specificity for identification of pathogenic germline variants in BRCA1 and BRCA2. Given this, the authors concluded that expanding the NCCN genetic testing criteria to include all women diagnosed with breast cancer at or before the age of 65 will markedly improve the sensitivity of genetic testing and avoid the need to evaluate all patients with personal history of breast cancer. The major limitations of this study were that cost-effectiveness of this approach was not analyzed, and the majority of the patients included in the registry were White, limiting the applicability of these findings to a diverse patient population. Despite these limitations, this study offers a promising and considered approach to genetic testing in patients with personal history of breast cancer. While validation of this approach in additional study cohorts would be of great value, this data strongly suggests that testing all patients at or below age 65 at the time of breast cancer diagnosis achieves a balance between the two current testing paradigms, identifying the vast majority of patients at risk, and avoiding unnecessary testing of many. This concludes this JCO Podcast. Thank you for listening.

When Cherielee was 26 years old, she was found to carry a mutation in the CDH1 gene. Her genetic diagnosis led her down a path that included a prophylactic gastrectomy at the age of 30, followed by multiple complications. Today, Cherielee is 31 years old, still recovering but very glad of her decision to undergo prophylactic surgery and grateful for her aunt's cancer diagnosis and testing that allowed her to take steps to prevent cancer. Cherie is passionate about the need for doctors to focus on their patients’ cancer family history and either offer hereditary cancer testing or refer their patients on to a genetic counselor. She also recently started an Instagram account focused on Stomach Cancer Awareness: @previvor_perspective Story Reference Points: Cherie’s aunt is found to carry a CDH1 mutation @ 1:56 Cherie’s mother gets involved with No Stomach for Cancer and has genetic testing done through a genetic counselor @ 7:17 Medical management for someone with a mutation in CDH1 @ 10:30 Cherie and her younger brother and sister consider testing @ 15:26 Cherie receives her positive test results @ 17:57 From screenings to prophylactic gastrectomy @ 19:59 Multiple complications and a long recovery @ 24:04 Adjusting to life without a stomach @ 29:40 Breast screenings and a decision about prophylactic mastectomy @ 34:15 Cherielee’s story inspires her fiancé’s career @ 35:52 Cascade testing saves other relatives’ lives @ 39:40 Looking ahead to family planning @ 40:54 Inspiration to start the @previvor_perspective instagram account @ 43:32 Why are doctors missing patients who should be offered testing? @ 47:07 Links and Resources Cherie’s Instagram focused on Stomach Cancer Awareness: @previvor_perspective No Stomach for Cancer Facing Our Risk of Cancer Empowered (FORCE)/a> Cherie on Linkedin Cherie on Facebook Check out other Patient Stories podcast episodes. Read other Patient Stories on the Grey Genetics Patient Stories Page Do you want to support Patient Stories? You can now make a donation online! Want to support Patient Stories in a non-monetary way? Leave us a review on iTunes, or share your favorite episodes on Social Media. Patient Stories on Twitter: @GreyGeneticsPod Patient Stories on Instagram: @patientstoriespodcast Are you looking for genetic counseling? Patient Stories is sponsored by Grey Genetics, an independent telehealth genetic counseling and consulting company. Book an appointment with a genetic counselor specialized in hereditary cancer or in or another area of concern. Choose from our growing Network of Genetic Counselors. All genetic counseling appointments take place over secure, HIPAA-compliant video-conferencing or by phone. Check out ou

This work employed a mouse model of liver specific depletion of the gene Cdh1 and its respective protein E cadherin to study the role of this protein in liver homeostasis and pathophysiology. The experiment was done with specific focus on the effects concerning hepatocellular carcinoma (HCC) development. Background: Cadherins are present in all higher organisms, and have been studied rigorously in the past. The cadherin family is huge, encompassing more than 400 (known) members. E cadherin is the name-giver of that family and is considered to be of great importance to a broad range of physiological and pathophysiological functions. Known functions include cell-cell adhesion and deregulation of E-cadherin (in almost all cases a down-regulation) is associated with increased aggressiveness in both human and animal tumors. Aside from that, E-cadherin is of great importance during embryogenesis. Worldwide, HCC is an important disease in humans, especially in certain countries (mostly developing countries). While females are only occasionally affected by HCC, it ranks among the top 3 tumor-related death causes in males. The difficulties in treating this tumor curatively make research of genes or proteins relevant to HCC important for human medicine improvement. The existence of a connection between Cdh1 or E Cadherin and HCC has been suggested, but more research is still required. Methods: Employing Cre/loxP technology, a mouse model of liver specific E cadherin depletion was created (L Cdh1del/del). The mice were compared to littermates with normal Ecadherin levels (L Control). Mice body and organ weight was documented at different ages, and liver tissue was analyzed using qRT-PCR (cDNA), Western blot, histochemistry and immunohistochemistry. To test effects of the reduced E-cadherin on tumor development, a cohort of male mice was injected with a chemical carcinogen (DEN) at two weeks of age to induce HCC, and mice were analyzed 4, 8 or 12 months later. Results: Aside from a slight retardation in weight gain, L Cdh1del/del did not suffer from severe health effects or spontaneous tumor development. Histology showed some alterations around the small bile ducts in the liver (in the periportal fields) and RNA analysis showed that mice underwent a phase of considerably altered RNA activity (429 significantly regulated genes at 3 weeks of age), but later only a few up/down-regulated genes remained (28 genes at 6 weeks of age). Aside from Cdh1, no genes considered cadherin family members were regulated. Western blot analysis, qRT-PCR and IHC confirmed that E cadherin was down regulated on RNA level and on protein level in this animal model. All mice injected with DEN developed tumors, but L Cdh1del/del were affected more heavily, with tumors reaching large diameters faster. If mice were kept longer than 8 months, L Cdh1del/del had to be euthanized significantly earlier than L Control. A spin-off of the model was the establishment of a permanent cell line, developed from a liver tumor of a L Cdh1del/del mouse. PCR requiring a functional primer binding site on exon 10 of Cdh1 could not produce DNA product, indicating that the cell line was a derivative of an E-cadherin negative liver cell. Conclusion: Liver specific E cadherin reduction had a surprisingly small effect in the present mouse model (compared to the effects of E cadherin loss in organs like the skin or intestine, as documented in the literature) if mice were not challenged with a chemical carcinogen. If mice were challenged with experimental HCC induction, lack of E cadherin had a strong effect on the tumor growth. These findings attest, by an experimental animal model, the importance of E cadherin for tumor development in the liver. This data reinforces previous observations concerning E cadherin effects on tumors in studies working with resected human tumors of the liver or with conditional organ specific mouse models studying carcinoma in other organs (like the mammary gland, for example). Therefore, this animal model could help improve the understanding of mechanisms regulating aggressiveness in human tumors.

One third of gastric cancers harbor genetic or epigenetic alterations in the CDH1 gene, and those with structural changes have a poorer prognosis; gastric tumor profiling for oncogenic amplifications and mutations may identify targets for personalized therapeutics.

E-cadherin is a major component of adherens junctions. Impaired expression of E-cadherin in the small intestine and colon has been linked to a disturbed intestinal homeostasis and barrier function. Down-regulation of E-cadherin is associated with the pathogenesis of infections with enteropathogenic bacteria and Crohn's disease. To genetically clarify the function of E-cadherin in intestinal homeostasis and maintenance of the epithelial defense line, the Cdh1 gene was conditionally inactivated in the mouse intestinal epithelium. Inactivation of the Cdh1 gene in the small intestine and colon resulted in bloody diarrhea associated with enhanced apoptosis and cell shedding, causing life-threatening disease within 6 days. Loss of E-cadherin led cells migrate faster along the crypt-villus axis and perturbed cellular differentiation. Maturation and positioning of goblet cells and Paneth cells, the main cell lineage of the intestinal innate immune system, was severely disturbed. The expression of anti-bacterial cryptidins was reduced and mice showed a deficiency in clearing enteropathogenic bacteria from the intestinal lumen. These results highlight the central function of E-cadherin in the maintenance of two components of the intestinal epithelial defense: E-cadherin is required for the proper function of the intestinal epithelial lining by providing mechanical integrity and is a prerequisite for the proper maturation of Paneth and goblet cells.