Tag Archive for: EGFR mutations

What Biomarkers Affect Lung Cancer Care and Treatment?

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What Biomarkers Affect Lung Cancer Care and Treatment? from Patient Empowerment Network on Vimeo.

Lung cancer driver mutations can have an impact on therapy choices for patients. Dr. Grace Dy discusses the various lung cancer driver mutations and how treatment options may target specific markers.

Dr. Grace Dy is Chief of Thoracic Oncology and Professor of Oncology in the Department of Medicine at Roswell Park Comprehensive Cancer Center in Buffalo, New York. Learn more about Dr. Grace Dy.

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Transcript:

Katherine Banwell:

How does testing impact treatment and care? 

Dr. Grace Dy:

So, back in like maybe more than two decades ago, I was still in school. The treatment paradigm is sort of like a one size fits all. You come in with a lung cancer diagnosis. Everybody gets treated the same.  

But with advancements in technology and understanding of actually what we call lung cancer is really genetically very different from one patient to another. We are actually not even still able to tease out all the particular details, but there are some improvements that have been made along the way. And so, defining, for example, mutations in cancers, there are what we call driver mutations that have a matched targeted therapy.  

In certain patients, actually the target therapy works so much better than chemotherapy, for example. And that’s why we have it in guidelines based on the results of clinical trials showing that in the appropriate setting, if you have a mutation that we discovered through molecular testing, and then you use the matched target therapy, survival is so much better compared to, for example, chemotherapy.  

Same with immunotherapy. If we use a biomarker to test out which patients may actually respond well to immunotherapy alone – so, that’s a major treatment paradigm change within the less than 10 years wherein we define there’s a group of patients where that’s all they need. Non-chemo, just immunotherapy, and they will do well. 

Katherine Banwell:

What are some of the mutations that are being targeted? 

Dr. Grace Dy:

Right. So, it seems like every year, it’s growing. So, it started off with the poster child in lung cancer story of EGFR. So, we have EGFR mutations. Even EGFR mutations, they’re a subtype of mutations for – there are certain drugs that work better for certain mutations.  

So, we have the classical EGFR mutations, the atypical EGFR mutations. But EGFR mutations as a group are probably the most characterized given the longevity of the research that has been done. But there’s a lot more. 

So, for example, ALK, KRAS, BRAF, HER2, NTFK, NRG, RET, MET. Even those mutations, they’re all these new ones. It’s between the subtype of mutations. For example, we talked about EGFR. Same thing with MET. You have MET exon 14 skip mutations. But in the absence of MET skip mutations, there are also what we call MET gene amplification, MET protein over-expression that have matching therapies that may actually work better. 

But we’re still kind of scratching the surface. There’s a whole lot more being characterized and developed. Case in point, just a little over a year ago, there’s an LTK Fusion that was described. Very rare. But there’s a target therapy for it. So, unless you test it, you won’t find a matching targeted therapy. 

Building on Lung Cancer Successes for Targetable Oncogenic Drivers

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Building on Lung Cancer Successes for Targetable Oncogenic Drivers from Patient Empowerment Network on Vimeo.

How can recent lung cancer successes be built upon? Experts Dr. Lyudmila Bazhenova and Dr. Jessica Bauman explain advances in lung cancer testing and how targeting of oncogenic drivers can impact patient care.

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Transcript:

Dr. Nicole Rochester:

So I’d love for the two of you to talk about some of the successes in testing over the past decade for lung cancer patients. And we’ll start with you this time, Dr. Bazhenova.

Dr. Lyudmila Bazhenova: 

I think our successes actually became our challenges. We have seen an explosion of targetable oncogenic drivers. If you look at the FDA approvals for oncogenic driven therapy, we have a first approval in 2004 and then there was kind of a silence for almost a decade. And then starting in 2014, every year we now have three or four drugs approved. And also those drugs are being approved for the same indication, but different companies. So I think it is very hard for a practicing oncologist who have diseases other than lung cancer to actually keep up with exploding information that they need to know. And I think that’s why I say our success is our challenge, our success is that we are now in lung cancer have 10 oncogenic drivers that we have treatment for.

Our challenge is to remember that there are 10 oncogenic drivers. It’s becoming even more complicated because if you take, for example, an EGFR story, we don’t just need to know that the patient has an EGFR mutation. We need to know what type of EGFR mutation we have, that patient has. And it is no longer three categories. Like even looking in atypical mutations, we now separate out so-called pack mutations, which are treated differently than anything else. So it’s difficult for a practicing physician, or mid level-level practitioner to remember what even to do for lung cancer, but they have to do a breast cancer and colon cancer and everything else. So it is a challenge currently.

Dr. Nicole Rochester: 

I appreciate you highlighting that. A lot of times it’s like a double-edged sword, right? What are your thoughts, Dr. Bauman, and in terms of the successes as well as some of the challenges?

Dr. Jessica Bauman: 

So I absolutely echo what Dr. Bazhenova is saying in terms of the amazing successes, right? We now have for multiple different populations, we have an oral medication that can treat their cancer with the hope that it keeps that cancer under control for many, many months and for some people even years. And I think the challenge is absolutely keeping track of all of those different mutations and then what is actually targetable. And if you have, is it a mutation? Is it a fusion? Is it… What exactly is it that allows you to then use that targetable therapy? Is certainly one challenge. The other challenge is getting that information as soon as we can get it. So you can imagine, so somebody comes in to see me with a new diagnosis of metastatic lung cancer, right? Their biopsy was done say two weeks at a different hospital, and their first scan was done six weeks ago.

So now they’re already six weeks into the concern of a diagnosis of lung cancer, and they’re symptomatic and they come to see me and say, what am I going to do? And we have to get all of that information as fast as we can, because it completely changes the way we’re going to treat them. And so creating systems, in particular reflex testing systems such that this is sent immediately so that by the time they’re seeing me we already have this information is really important. But that, I think that is sort of at its infancy. At Fox Chase, we’ve worked on our sort of reflex system for a very long time. And it’s still, every time there’s a new approval, it seems like it changes slightly or there’s a new system that we have to think about it. But at the end of the day we also…one of the challenges is making sure that we streamline the processes in which we get this information in the best way we can because tissue can be limited.

There is a lot, making sure that you actually get adequate tissue sampling to be able to test for everything that you need to test for is really important. Then figuring out where to send the testing. Many academic centers have internal panels that they send for molecular testing, but there are so many different companies that advertise doing some kind of molecular testing. And so knowing which of those companies to consider using, what they’re offering, which ones offer RNA sequencing, for example, because that is a particularly important aspect, in addition to DNA sequencing that we need. And so sort of keeping track of all of that is particularly challenging. And then I think the last thing is, I think it’s the needing this information earlier and earlier in a diagnosis.

And so once upon a time, it really was the medical oncologist who could drive this and run the show because it was really, we needed it for somebody with metastatic disease, right? And we’re sort of the captains of the ship per se, when someone has a new diagnosis of metastatic disease. However, now there’s adjuvant therapy for patients who have EGFR mutations after a surgical resection. And so we need, the surgeons also need to really understand that we need this information. And they often are now getting these tests before a medical oncologist even sees the patients. And so it isn’t just medical oncology, it’s also now, it’s going into multiple different specialties who also need to understand what these mutations mean and what to do about them, and then how it influences therapies. 

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What Guidelines Exist for Lung Cancer Genomic Biomarker Testing?

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What Guidelines Exist for Lung Cancer Genomic Biomarker Testing? from Patient Empowerment Network on Vimeo.

What lung cancer guidelines are there for genomic biomarker testing? Expert Dr. Jessica Bauman from Fox Chase Cancer Center explains developments in genomic biomarker testing and mutations that are checked for in testing.

Download Resource Guide

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Transcript:

Dr. Nicole Rochester: 

So I’m going to start with you, Dr. Bauman. Can you discuss existing guidelines for genomic biomarker testing for lung cancer?

Dr. Jessica Bauman: 

Sure. I’d be happy to. So genomic and biomarker testing in general has really been at the forefront of many conversations about lung cancer over the course of the last decade or longer, 20 years. Because it has really changed our approach to patient care and individualized the way that we treat and make decisions about patients with lung cancer. And so what this means, is for every single person who has a new diagnosis of lung cancer, essentially everybody is now recommended to have molecular testing on their individual tumor samples to help us decide what treatment decisions are the best for them. Now, it used to be that this was really only recommended for patients with a new diagnosis of metastatic lung cancer, but now we’re seeing this really influenced decision-making earlier on than the metastatic setting.

And so we now have treatment approaches that change based on molecular testing for early stage one cancer as well. And so, although it used to be more of a later stage, necessity, now we really…we really now need the information sooner than ever before. And when we say molecular testing, this is really looking at the individual tumor and what is potentially driving the cancer to grow. So to look for oncogenic drivers that change treatment. So I call this with my patients, I call this the alphabet soup. But this includes, EGFR mutations, ALK, ROS1, RET, HER2 as well as many others that influence the potential treatment options that we have for our patients.

Dr. Nicole Rochester: 

Awesome, thank you. That is a great overview. Do you have anything to add to that, Dr. Bazhenova?

Dr. Lyudmila Bazhenova:  

No, I think that was very nicely summarized. I think an important thing is that we have to test, we cannot guess. We have to know what our patients…what mutations our patients have, and then we have to know what to do with that. That’s kind of a second part of the question. 

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How Can Specific Biomarkers Impact Lung Cancer Progression?

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How Can Specific Biomarkers Impact Lung Cancer Progression? from Patient Empowerment Network on Vimeo.

Lung cancer progression can be aided by monitoring of biomarkers, but what do they indicate? Expert Dr. Christian Rolfo from Mount Sinai explains biomarker characteristics that help monitor disease progression and how clinical trials help in treatment advances.

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Transcript:

Dr. Nicole Rochester:

So with regard to the biomarkers, you mentioned that these are kind of unevenly distributed among different populations depending on your origin, and so how does that play into the progression of the disease, what do we know about why patients with specific biomarkers have a different degree of disease progression?

Dr. Christian Rolfo:

Yeah, so we know more or less that the characteristics, I mean more or less in terms of the evolution of the clinical characteristics of these patients, in terms of organ affection in case of progression, but what is most important of this is that we are able to continue to identify, and I say monitoring these patients with liquid biopsy, for example, this is a good tool to understand or to understand it a bit better, which kind of mechanistic involvement. 

So because we have, for example, patients who were receiving the case that I was discussing before EGFR mutations and they received one graft from the very beginning, a third-generation TKI is the one that is approved for the first line, and this patient has a progression. The possibility to have a mechanism of resistance is different, so we can have mutations that are coming in the same pathway, so in the same area, same kind of mutation, but different location, just to the people understand is the kind of line and we have the mutation that is here, the one that we are attacking, but we have another mutation that is in this area, and it’s not covered by the track that is covering this mutation. 

So we have nowadays drugs that are going to, in this area in clinical trials, or we have in other cases other areas of the task of mutations that have nothing to do with the original one. So we are activating another kind of pathway, or we are transforming the tumor from one kind of tumor to another kind of tumor, so for this reason, identify which kind of mechanism of resistance is in place can have an important or have important implications for how we are treating these patients,  so we need to look at that to treat the patients.

Dr. Nicole Rochester: Wonderful. And speaking of resistance, we know that there are some patients who end up trying multiple therapies in order to treat their lung cancer, are there alternative treatment strategies for lung cancer patients who have failed all therapies? 

Dr. Christian Rolfo: 

Yeah, absolutely, we have research in lung cancer is never stopping in oncology generally, but in lung cancer it’s really exciting to see how this research is evolving, and it’s arriving to the patients the meaning of the research when we are doing access to the patients, to the discovery of the finding that we have, and obviously, we have strategies in the clinical practice, but also we have the clinical trials. So clinical trials, and that is something we need to try to define very well because some patients believe that when we are going to clinical trials there are no more options or we don’t have any other options to do. 

We are sometimes using clinical trials even in the first line, so even in patients that are for the first time being treated. Because we know that some of the cases we are treating patients with from some standard of care and using drugs on top, we want to explore it, we can improve these outcomes that we already know. That could be also a clinical trial, that is also a clinical trial. So don’t take the participation in a clinical trial as the last option that you have, sometimes you will go to your doctor and the first time that you see a doctor for your first diagnosis, they can propose a clinical trial. 

And this is really valuable. What we really appreciate is the collaboration of the patients to be in clinical trials, because we need to remember that the drugs that we are using today were analyzing other patients before, so the treatment that you are receiving in a standard of care today were before a clinical trial, it’s really important how we can interact with the research and the clinical practice very easily, so we have also some options that are…for what we call early drug development, that there are some drugs that are in patients who are receiving the standard of care, and they have the opportunity to be treated in new drugs, and you can discuss…believe me there, and 

I know that there is a lot of questions about clinical trials but the clinical trial setting is really restrictive, it’s very well-coordinated, so you would be part of a very coordinated and structured things that they try to protect the patients in the first instance, and try to understand also how we can help the patients and the future generations. So that is really why we appreciate patients that the contribution of patients that are giving to this clinical research because it’s helping to advance the knowledge for the new patients as well.

Dr. Nicole Rochester: 

And I really appreciate how you described clinical trials, and particularly your distinction about it’s not always this last ditch effort that sometimes you all are using clinical trials as first-line therapy. One of the common things is that clinical trials are tomorrow’s medicine today, and helping patients and families to understand that there’s value in being involved in clinical trials and that…and I think with COVID there’s a little more understanding, but certainly, we have a long way to go, and so I appreciate you sharing that. Do you have any specific examples of patients in your practice, and not names, of course, but examples of…that have benefited from clinical trials?

Dr. Christian Rolfo: 

Absolutely, we have several of examples, and actually FDA was doing a terrific job in the last year to try to get access quickly access to the drugs for patients, and some of this access that was granted was based in clinical trials that we’re starting for a Phase I or Phase II trials, owe are really doing a very rapid evolution of the drug development, and this is a revolution actually of the drug development because we have access very quickly. I can tell you that it was certainly in my career, several patients in clinical trials that they got benefits. Obviously, clinical trials are answering questions, so that is the way that we can answer questions scientifically and is the only way that we can advance in clinical therapeutics.