Tag Archive for: tumor lysis syndrome

Managing CLL Symptoms and Treatment Side Effects

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Managing CLL Symptoms and Treatment Side Effects from Patient Empowerment Network on Vimeo.

Chronic lymphocytic leukemia (CLL) expert Dr. Seema Bhat reviews common CLL symptoms and treatment side effects and approaches for managing them. Dr. Bhat stresses the importance of sharing any issues they may be having with their healthcare teams.

Seema Bhat, MD is a hematologist at The Ohio State University Comprehensive Cancer Center – The James. Learn more about Dr. Bhat.

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Transcript:

Katherine:

Can you please talk about common side effects of CLL – which, of course, we’ve covered already, but both the ones from the disease itself and then ones related to treatment, and what can be done about these? 

Dr. Bhat:

So, disease-related side effects, or we call them disease-related symptoms, include fatigue as a common symptom. Unintentional weight loss can happen. Fevers, chills, or drenching night sweats can happen. We call them, “B symptoms.” Spleen can enlarge, and the enlargement can cause belly pain or feeling of fullness quickly after a meal since spleen is close to our stomach, and as it enlarges, it limits the space stomach can take up in the belly. Lymph nodes can enlarge and can get uncomfortable. So, if any of these symptoms happen, then we have to treat the CLL, and once we start treating the CLL these symptoms should go away. 

As far as treatment-related side effects are concerned, for example, BTK inhibitors are associated with a certain set of side effects. For example, patients can have muscle cramping, muscle pain, joint pain. Patients can have diarrhea. Some of the side effects that we worry about is change in heart rhythm, for example, atrial fibrillation. We talked about that, or increased risk of bleeding.  

Those are some of the side effects we worry about, and if those were to develop, then, of course – for example, a patient has atrial fibrillation, and if it’s symptomatic, we hold the medication. We take care of the atrial fibrillation, usually in collaboration with cardiologists, and once that’s under control, then we have to decide what to do with the treatment. If the atrial fibrillation is under control, we can re-initiate the treatment, or we can go to one of the next-generation BTK inhibitors – the acalabrutinib (Calquence), the pirtobrutinib (LOXO-305), which have less of those side effects. 

Bleeding tends to be a concern, but anything that reduces the risk of bleeding like other medications, aspirin, clopidogrel (Plavix), other blood thinners, we can avoid them, monitor these patients very closely for any of these side effects, so that’s critical. With venetoclax, it’s usually very well-controlled. It’s the initial part of treatment that tends to be a little bit intensive because of the specific side effect called, “tumor lysis syndrome,” which means that the drug works very quickly, and cells die off quickly, they can release stuff in the blood, and things can collect in the blood. 

Uric acid can go up, electrolytes can be up, any number can go up. So, we are aware of this side effect, and we actually pre-emptively have things in place that can prevent this from happening, or if it happens, we manage it right away. For example, venetoclax has a specific dose initiation. For example, it’s called, “dose ramp-up.” We start it at a lower dose, 20 milligrams, for one week. Escalate it to 50 the next week, 100 the third week, 200 fourth week, and 400 the last week, which is the standard dose. They continue on 400 from there onward. 

And even with the slow dose escalation, in the early couple of weeks, we monitor them very closely. Once we initiate a dose, we bring them back to the clinic to recheck their blood work to see if there are any changes. If any changes have happened, we hydrate them, initiate medication for their tumor lysis syndrome. 

If the risk of tumor lysis is very high, then we monitor then admit them to the hospital. Otherwise, long-term side effects of venetoclax, what we have noticed mostly is gastritis, most side effects – mostly diarrhea. But that’s usually well-controlled. We can manage it well with supportive care. 

Can a CLL Patient’s Response to the COVID Vaccine Be Boosted?

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Can a CLL Patient’s Response to the COVID Vaccine Be Boosted? from Patient Empowerment Network on Vimeo.

Is there a way to boost COVID vaccine response in patients with CLL? Dr. Jean Koff explains ongoing progress being made to protect CLL patients from COVID.

Dr. Jean Koff is an Assistant Professor in the Department of Hematology and Oncology at Winship Cancer Institute of Emory University. Learn more about Dr. Koff, here.

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Transcript:

Katherine Banwell:

We received another patient question prior to the program. Has there been any progress in helping CLL patients get a better reaction from COVID vaccines? 

Dr. Jean Koff:

That is a great question, and that is one that is near and dear to my heart and my colleagues at – at Emory. You raise a really good point, which is that CLL patients have altered immune systems just by virtue of their CLL. The CLL cells exert their influence on other immune cells and can cause your immune system not to respond to infections or immunizations the way it normally would. That’s without any medication in the mix. Now, when we look at patients who are on medications like the ones we’ve been talking about, the BTK inhibitors, venetoclax (Venclexta), but especially the monoclonal antibodies that react against CD20, we see that those patients really do not have an optimal response to vaccines, especially the COVID vaccine. 

Meaning, that patients who receive the COVID vaccine while they’re on that therapy, or even within 12 months of receiving a monoclonal antibody, often don’t mount the same strong immune response as somebody who’s not on those therapies. So, luckily, we – we don’t have to just depend on the vaccines. I still recommend that my patients get vaccinated, because it is safe and it might impart a little bit of efficacy, and it’s certainly more effective than not getting the vaccine. But we also have other approaches to increasing your protection against COVID, including the – the injection called tixagevimab co-packaged with cilgavimab (Evusheld), which can help protect patients specifically whose immune systems are not completely normal and are not expected to mount a strong response to COVID vaccines.  

So, that is definitely a discussion to have with your doctor about how your medications impact your protection from COVID, from vaccines, and whether there are other medications that might be used to help increase your protection.   

Katherine Banwell:

That’s great advice.  

What is YOUR Role in Choosing a CLL Treatment Approach?

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What Is YOUR Role in Choosing a CLL Treatment Approach? from Patient Empowerment Network on Vimeo.

Dr. Jean Koff shares her perspective on the role of patient when deciding on a CLL treatment approach and reviews key factors that should be considered.

Dr. Jean Koff is an Assistant Professor in the Department of Hematology and Oncology at Winship Cancer Institute of Emory University. Learn more about Dr. Koff, here.

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Transcript:

Katherine Banwell:

What is the patient’s role in deciding on a treatment plan? 

Dr. Jean Koff:

So, it’s very important that the patient be involved in deciding on a treatment plan. Especially in first-line. Because we have these two excellent classes of agents, the BTK inhibitors and the venetoclax- containing regimens. Both of them have been shown to have very good what we call efficacy CLL, meaning that they’re able to control the disease, patient’s symptoms largely at bay for long periods of time. You know, we’re talking an average of years that – that patients are on these therapies. And they each, like I said have different side effect profiles.  

And they’re given in slightly different ways. And so, right now we don’t have data from our clinical trials comparing a BTK inhibitor regimen to a venetoclax-containing regimen in CLL patients to tell us one is better than the other. And so, for that reason, a lot of the decision-making about which therapy is going to be better for you, or which therapy you would prefer, lies with the CLL patient rather than with the doctor. And the things that I ask my patients to consider, there are a couple different things. One is the side effect profile. So, patients may be more or less comfortable with certain  

side effects of one drug compared to another. Or there may be something in the patient’s medical history that puts them more at risk for a certain side effect than another. 

The other major player in this decision-making process is how these drugs are given. So, with ibrutinib (Imbruvica), the ibrutinib is given as a pill that you take once a day, and you take it indefinitely. Meaning you take that pill once a day for as long as it’s doing what it’s supposed to do, which is keeping your CLL under control, and as long as the patient is tolerating it well, meaning you’re not having a lot of uncomfortable side effects from the ibrutinib. So, I have patients who have been on ibrutinib for years and years and years and years.  

The venetoclax-containing regimen for patients who are getting their first-line treatment in CLL is different. It is designed as a – what we call time-limited therapy. And so, this regimen is given in – over about 12 months, 12 or 13 months, and then stopped, as long as the patient has had a good response. The other thing to consider with the venetoclax r egimen, it’s not just the pill. You do take a pill every day, but you also get a – an infusion for about six months of the monoclonal antibody. Meaning that you’ll have to come into the infusion center and get an infu – an IV infusion of this drug called obinutuzumab. The last consideration with the venetoclax regimen that differs in how it’s administered, is the venetoclax often works so well that it can break down the CLL cells a little bit too quickly. And so, for patients who have a very, very high white count, or large lymph nodes due to their CLL, there is a risk of something we call tumor lysis syndrome, which refers to the process where the tumor cells break down very, very quickly, and they produce molecules that are released into the bloodstream that can be dangerous if they get too high or too low. And so, sometimes, in some patients we have to monitor for the tumor lysis syndrome by checking labs fairly frequently after we start the venetoclax. And for some patients that means they have to stay overnight for a night or two in the hospital for lab monitoring.  

So, for some of my patients that I talk to about venetoclax, they say I want to stay out of the hospital, I just want to take a pill, I’m fine taking a pill, I’ll go with the BTK inhibitors. For other patients, they say I don’t want to be on a pill every single day, I will go through this year of therapy, I’m comfortable with that, and I’m happy that I’ll be able to take a break from therapy after one year. So, that ends up being a large factor in many of the conversations I have with my patients about which therapeutic approach we’re going to use in front-line therapy.  

What Do You Need to Know About CLL Treatment Side Effects?

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What Do You Need to Know About CLL Treatment Side Effects? from Patient Empowerment Network on Vimeo.

CLL Expert Dr. Jean Koff discusses common side effects of CLL treatment and explains how they can be managed.

Dr. Jean Koff is an Assistant Professor in the Department of Hematology and Oncology at Winship Cancer Institute of Emory University. Learn more about Dr. Koff, here.

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Transcript:

Katherine Banwell:

What are the common side effects of treatments, and how are they managed? 

Dr. Jean Koff:

So, each of the different classes of agents has a different profile of side effects. The BTK inhibitors, the first class that I mentioned with ibrutinib (Imbruvica) and acalabrutinib (Calquence), are usually very well tolerated. The most common side effects that we tend to see are things that the patients can feel or see, but also things that we can see on the labs when we’re monitoring patients. So, sometimes you can see a lower platelet counts or lower blood cell counts with ibrutinib. That’s something that you may not notice, but your doctor’s going to notice on the – the blood counts when you come to the office. Sometimes ibrutinib can cause a rash or GI upset, this is usually easily managed with supportive care from your physician.  

And then some more – some more common effects of the BTK inhibitors include joint pain and headache. And again, many physicians, because we’ve been using BTK inhibitors for a long time, have a good regimen for treating these side effects. More uncommon side effects of BTK inhibitors, particularly ibrutinib that we look out for would be abnormal heart rhythms and some tendency for bleeding. But these are relatively uncommon and with newer BTK inhibitors, we’re seeing lower rates of these side effects.  

Dr. Jean Koff:

So, in terms of venetoclax side effects we have a little bit of a different profile. This agent is much more likely to cause lower cell counts, especially in a white blood cell count known as neutrophil count, and so your doctor will be monitoring you for that. In terms of patient side effects that you can feel, it can cause a rash, it can cause some GI upset. These are usually relatively easily managed but we want you as the patient if you’re on venetoclax to talk to your doctor about these side effects so that they can help you feel better and help you manage those. In terms of the anti-CV20 monoclonal antibodies, which we use a couple in CLL more frequently, they have very similar side effect profiles.  

So, one is rituximab, and one is obinutuzumab. Obinutuzumab is usually used in combination with venetoclax in front-line CLL.  

Like I mentioned before, this is an infusion and most of the side effects that we think about and most commonly see in these anti-CV20s are side effects that patients have during the infusion. And these are referred to as infusion reaction. And these are relatively common, around 30 percent in these anti-CV20 monoclonal antibodies. So, what is an infusion center react – er sorry, what does an infusion reaction look like? This looks sort of like an allergic reaction. 

Katherine Banwell:

Hm. 

Dr. Jean Koff:

So, your nurses in the infusion center are going to be monitoring you very carefully once you start the infusion, and they’re going to start it at a low dose, very slowly. But the side effects they’re monitoring for, they’re looking for changes in your heart rate or blood pressure. You may start to feel hot or cold or sweaty, you may have chills. Sometimes patients can have swelling in their throat or their tongue. And what will happen is because these are fairly common, is we’re still able to give the anti-CV20, but what we do is the nurse will stop the infusion, they may give you some medications that calm down that infusion reaction. So, medications like antihistamines –  

Katherine Banwell:

Mm-hmm.  

Dr. Jean Koff:

Or steroids that help tamp down that immune response, and then they start the anti-CV20 infusion at a lower rate. The vast majority of patients will be able to receive an anti-CV20 antibody even if they have an infusion reaction. They may just need a little bit more of those immune tamping-down medications like antihistamines and steroids. And then the last thing to consider, which I think we’ve mentioned, especially in the venetoclax-containing regimens, is the tumor lysis syndrome. And so, that is a side effect like we mentioned is kind of like the venetoclax working really, really, really well, of the tumor breaking down too quickly.  

And so, patients who have tumor lysis, if they’re at high-risk, hopefully they’re already being monitored very closely with frequent lab draws, and they may receive medications that – that diminish the risk of adverse events happening because your electrolytes are out balance, for instance, your potassium is too high, or your calcium is too low. Because your doctors are monitoring you closely, they can give you medications that can help balance  out those – those electrolytes and help protect the kidneys. The tumor lysis is typically not a risk after the initial doses of venetoclax.  

So, the first couple weeks is when we typically monitor that, and then once the CLL has been broken down, or as I like to say, once it’s been cooled off a little bit, then you no longer have this risk of tumor lysis and it – it doesn’t require further monitoring. 

Katherine Banwell:

That’s great information, thank you.  

Targeted CLL Therapy: What Are the Side Effects?

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Targeted CLL Therapy: What Are the Side Effects? from Patient Empowerment Network on Vimeo.

What are common side effects of chronic lymphocytic leukemia (CLL) targeted therapies? Dr. Jennifer Woyach discusses side effects of specific targeted therapies and the importance of reporting any issues to your doctor for optimal quality of life.

Dr. Jennifer Woyach is a hematologist-oncologist specializing in chronic lymphocytic leukemia (CLL) at Ohio State’s Comprehensive Cancer Center – James Cancer Hospital & Solove Research Institute. Find out more about this expert here. 

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Transcript:

Katherine:                  

If there are side effects, what would some of the side effects be for these targeted therapies?

Dr. Woyach:               

So, it depends on the drug. So, BTK inhibitors, specifically, ibrutinib can cause some joint and muscle pain, some rashes, diarrhea, heartburn. Those are things that tend to, if they’re going to happen, usually happen earlier on in treatment and tend to get better over time. It can also cause high blood pressure. It can cause an abnormal heart rhythm called atrial fibrillation.

So, those are things we watch out for with ibrutinib. Acalabrutinib really has all of the same side effects but for many of them, they don’t occur as often. And then, the tradeoff there is ibrutinib is given once a day and acalabrutinib is given twice a day. With venetoclax plus obinutuzumab with that regimen, you get a lot more hematologic toxicity. So, you see more lowering of the good white blood cell count, which is, obviously, a risk for infections. That regimen comes with a risk of something called tumor lysis syndrome, which is where the cells can break down too quickly and cause damage to the kidneys, damage to the heart.

It can also cause some GI disturbance like some diarrhea, nausea, abdominal pain, things like that. I see there are a lot of side effects. And, of course, when I’m talking to a patient about treatment, we go over them in more detail than that. But I think the important thing is with all of these therapies, we do have ways to manage these side effects.

One thing I think is important for patients to remember is your doctor doesn’t know you’re having side effects unless you tell them. So, we know that people have these side effects. But if you don’t tell us that you’re having diarrhea or heartburn or things like that, we can’t help with it. And we have a lot of medicines that can help these things.

 

 

 

 

CLL Clinical Trials Explained

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CLL Clinical Trials Explained from Patient Empowerment Network on Vimeo. 

What are the phases of clinical trials in chronic lymphocytic leukemia (CLL), and what happens during each phase? Expert Dr. Anthony Mato explains the phases, criteria for trial selection, and addresses patient fears.

Dr. Anthony Mato is Director of the CLL Program at Memorial Sloan Kettering Cancer Center. Learn more here.

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Transcript:

Katherine:                  

For people who don’t understand how treatment approvals work, which would you give us an overview of the stages of clinical trials?

Dr. Mato:                   

Sure. I’m very involved in clinical trials at my center. There are different phases of clinical trials. And so, the way that I think about them would be – let’s focus on Phase I through III, because those are probably the most relevant ones for patients. The purpose of a Phase I trial is really to define the dose of the drug and confirm that it’s safe or not. We get very, very preliminary data about activity of the drug, but the major question that’s being asked is, “Is this drug safe?”

Phase II is – and I should also add that Phase I trials are relatively small. So, it’s a small number of patients where we’re trying to find the right dose. By the time we get to Phase II, we know the drug is likely safe. We have a lot of information about its side effect profile. We might have a hint that it’s active. And so, the purpose of a Phase II trial is to expand the size of the trial, have more patients recruited, get more information about safety but then get more information about activity.

Of course, there’s no comparator generally in a Phase II trial. So, it’s not like I’m asking this drug versus another drug. And the end of a Phase II trial, we know the drug is active, we know it’s safe. And if it appears to be active, we’re feeling confident that it may be better than a standard of care which leads to Phase III where the drug is compared directly in oftentimes what we call a randomized study to a standard of care.

So, the trial that I mentioned earlier, FCR versus FC would be a great example of a randomized, controlled trial where a new therapy would, in that case, the FCR, was compared to the old therapy, the FC.

In the more modern era, there have been several trials. I example I might mention is the RESONATE trial where ibrutinib was compared head-to-head to an antibody called ofatumumab. Patients who were enrolled were either randomized by a coin flip through a computer to one arm or the other. And then those arms are compared directly to help define a standard of care.

So, that’s kind of the basics of clinical trials, and at our center and many centers around the country, we participate in Phase I, II, and III trials trying to ask different questions that are important to our patients.

Katherine:                  

Well, speaking of patients, they’re very often fearful of participating in a clinical trial. What do you say to them to make them feel more comfortable with the idea?

Dr. Mato:                   

I mean, I think the most important thing to highlight is all of the standards of care that we’re using today, ibrutinib, acalabrutinib, idelalisib (Zydelig), duvelisib (Copiktra), venetoclax (Venclexta), these were all just drugs a few years ago that were studied in the context of clinical trials.

And so, our current standards of care are very new on the scene from clinical research. It’s very important to have a conversation with your doctor about the intent of a particular clinical trial. I think most patients are fearful of placebos or blinding where they don’t know what they’re getting, or it’s possible that they’re not getting any treatment at all.

In oncology and particularly CLL, the chances of a clinical trial having a placebo or blinding are very low. We very rarely ever participate in such studies. And so, that should provide reassurance to the patient that they know what they’re getting, they know they’re dose, their oncologist knows what they’re getting, and oftentimes, many clinical trials have mechanisms called crossover built into them. Meaning, that if you’re getting A versus B, and you get B, and it doesn’t work, you often have opportunity to cross over to A.

Clinical trials in CLL are the reason why there’s been so much innovation over the last several years, the reason why we can talk about six and seven approvals of drugs within half a decade.

And many of the drugs that we have at our centers will likely become standard of care in the near future. So, it gives us access to important drugs a little bit in advance of when they might be available for patients through FDA approval. So, it a lot of hope; it’s a lot of innovation. And the major message I would say to patients is don’t think of a clinical trial is for when all options have run out, but oftentimes there are great trial options that are aiming to improve the current standard of care in the frontline and also the relapsed/refractory settings.

Katherine:                  

What’s involved in patient participation in clinical trials?

Dr. Mato:                   

Well, the process is called informed consent, and so, if you’re interested in a clinical trial, you have a conversation with your oncologist to review the study, the schedule, the screening procedures. If you’re interested, you sign an informed consent and then begin a process of doing some testing, oftentimes scan, blood work, EKGs, bone marrow biopsy, to try to identify whether or not you’re a good candidate for the study.

Clinical trials are often more rigid than standard of care meaning you have to follow a strict schedule. You have to report everything, side effects, or successes related to the clinical trial. And oftentimes, a clinical trial is performed at the particular center that you signed the consent. And so, if you came to our center at MSK, odds are you would have to have treatment at our center in order to participate in that trial.

Once you’re enrolled on the trial, you’re on a strict schedule. You work with the physician and a research team, often a nurse directly who specializes in clinical trials to help ensure that you’re monitored appropriately and that the trial is successful for the patient.

An Expert’s View on Promising CLL Approaches

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An Expert’s View on Promising CLL Approaches from Patient Empowerment Network on Vimeo.

As chronic lymphocytic leukemia (CLL) research continues to expand, new and promising treatment approaches have emerged. Dr. Anthony Mato shares information on developing therapies, including inhibitor, immunotherapy, and antibody options. 

Dr. Anthony Mato is Director of the CLL Program at Memorial Sloan Kettering Cancer Center. Learn more here.

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Transcript:

Katherine:                  

Let’s get into developing research. Let’s get into developing research and what it can mean for patients. What new approaches are showing promise?

Dr. Mato:                   

Wow, that’s a loaded question, because there are so many possible answers. There are new versions of the current standards of care, different classes like BTK inhibitors or PI3K inhibitors which have the potential to be very active but better tolerated.

So, that’s one big group of new agents in development. There are several agents in development that appear to be effective in the setting of resistance to the current standards of care. There are classes of immunotherapies that allow us in different ways to use the immune system of the patient to fight cancer directly, so not necessarily targeting the cancer cell but targeting the immune system to make it do its job to filter out the cancer.

There are new antibodies in development. And that’s just a little slice of what’s in development for CLL and new combinations of course of the current standards of care which when put together could be even more effective. So –

Katherine:                  

What about – oh, go –

Dr. Mato:                   

Sorry. I was just going to add that so many different possibilities available that not every center can participate in all of these types of research, but it’s amazing for patients to know how many different new options are in development that maybe even better than the current approaches.

Katherine:                  

Right. What kind of side effects might be involved with the emerging treatments? What might people expect?

Dr. Mato:                   

That’s a hard question to answer, because the purpose of the clinical research is to help define the side effects associated with these newer drugs. And so, while we have a hint from early data or from Phase I data what a side effect profile might look like for a new drug, part of the consenting process is to help gather information not only about a drug’s activity but also about its side effect profile.

So, when we consent a patient, there is a little bit of an unknown about side effects, and we have sometimes very limited information that we can share about the activity. So, it’s not easy to just group these together and say these are the newest side effects to worry about. That’s really the purpose of the studies that I’m mentioning and the general idea of clinical research.

Katherine:                  

And that makes sense. How is research into the genetics of CLL providing a better understanding of how a patient’s individual disease may behave?

Dr. Mato:                   

Well, just a few years ago, the basic genetic studies for CLL included just a few chromosomal markers that we could easily or sometimes not so easily test. At our center, for example, and it’s not unique, we’ll be able to look at the over 400 different mutations associated with hematologic malignancies. The more information we get, the more we realize that although under the microscope a CLL cell may look like another CLL cell, biologically, they’re very different.

They’re driven by different genetic mutations, and knowledge of those pathways that are important for an individual CLL will oftentimes, will hopefully in the future guide how therapy is selected for patients.

Is My CLL Treatment Working?

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Is My CLL Treatment Working?  from Patient Empowerment Network on Vimeo.

During chronic lymphocytic leukemia (CLL) treatment, specific blood tests and diagnostic measurements are examined to gauge a patient’s treatment response. Dr. Anthony Mato details the specific criteria that are assessed while monitoring a therapy. 

Dr. Anthony Mato is Director of the CLL Program at Memorial Sloan Kettering Cancer Center. Learn more here.

See More From The Pro-Active CLL Patient Toolkit

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An Expert’s View on Promising CLL Approaches

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Transcript:

Katherine:                  

How do you monitor to see if a treatment is working, and what if the patient doesn’t respond to any of the treatments?

Dr. Mato:                   

Yeah, so, we response criteria, and so, they’re largely very simple measures. We perform a physical examination before and after treatment to see if the lymph nodes and spleen are decreasing in size. We measure the white blood cell count to verify that it’s going down. We look for normal parameters of normal functioning bone marrow like improvement in the hemoglobin or the platelet count.

So, those are some of the measures we use, and we put them together. And of course, just asking a patient how do they feel, do they feel better, are the symptoms that were associated with the CLL improving, and if the answer is yes, that would be considered responding disease. We also sometimes do measures like CAT scans to measure internal masses or internal lymph nodes and a bone marrow biopsy to verify that all the CLL cells are gone.

So, that’s the basics of a response assessment, and we also venture now into a new territory called MRD, or minimal residual disease, where we’ll be able to look beyond the traditional response assessment. Sometimes, it measures at a measurement of one in a million cells to verify that there’s no evidence of CLL present. If a therapy’s not working, fortunately – well, first I’ll say that with the modern therapies that we’ve already mentioned, response rates exceeded 90 percent.

So, it very, very infrequent that we have a patient where we pick the appropriate therapy where it doesn’t work for them. But if one is not working, then we do have measurements of resistance, and we can try to tell why a therapy maybe not working and switch them to an alternate class. And oftentimes, that will solve the problem.

Katherine:                  

Dr. Mato, you mentioned the term MRD. What does that mean?

Dr. Mato:                   

It stands for minimal residual disease. That’s using technology like flow cytometry or PCR or sequencing to take a deep look in the bone marrow and the blood for the presence or absence of CLL.     

So, when I perform a bone marrow biopsy, a pathologist with their eyes might count one hundred cells. With MRD testing we could look at 10,000 or 100,000 or 1,000,000 cells to see if there’s any CLL present, much more than the human eye or the human brain could process.

Factors That Guide a CLL Treatment Decision

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Factors That Guide a CLL Treatment Decision from Patient Empowerment Network on Vimeo.

When making a chronic lymphocytic leukemia (CLL) treatment decision, several factors come into play. Dr. Anthony Mato explains how he partners with patients to find the best fit for their specific CLL.

Dr. Anthony Mato is Director of the CLL Program at Memorial Sloan Kettering Cancer Center. Learn more here.

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Transcript:

Katherine:                  

So, with all of these options, how do you then decide which class might be right for an individual patient?

Dr. Mato:                   

Well, you think about the patient. You think about their medical history, their comorbidities, their preferences, and then you try to focus on their disease biology, their genetic factors, their molecular factors, and also what therapies they’ve had. So, if I had a patient who had ibrutinib (Imbruvica) previously, I’m not going to give them acalabrutinib if they were resistant, for example. So, it’s not just one thing. It’s multiple things that have to be taken into account in order to make a decision.

And, of course, for me as an oncologist, the hardest part is that there have not been many trials comparing the newest therapies to one another. So, I can’t tell you what’s better ibrutinib or acalabrutinib (Calquence) by a head-to-head comparison. I can’t tell you whether you should start with ibrutinib before venetoclax (Venclexta) or venetoclax before ibrutinib not because we’re not very interested in having those studies performed. But they have not been performed at this point in time.

The only thing I can tell you based on prospective data from a head-to-head comparison is that we do have direct data comparing acalabrutinib which is a BTK inhibitor to idelalisib (Zydelig) in the relapsed/refractory setting. And by all measures, acalabrutinib was better tolerated and more effective. So, we have some very early head-to-head data but not as much as we need in order to make these decisions for patients.

Katherine:                  

How are side effects taken into consideration?

Dr. Mato:                   

Well, all of these drugs although they are targeted, and they’re oral, and they’re relatively easy compared to chemotherapy are not without side effects. And so, each of these classes have their own unique side effects. BTK inhibitors can be associated with increased bleeding risk or atrial fibrillation or infection. PI3K inhibitors can be associated with lung or liver or colon damage. BCL-2 inhibitors might be associated with lowering of the blood counts and infection risk or something called tumor lysis syndrome.

So, we try to, if you had a side effect to one, not pick a drug with the exact same side effect profile, for example. And we also think about medical history for patients. So, if I had a patient who was on blood thinners and has poorly controlled atrial arrhythmia like AFib, I might not start them on a BTK inhibitor. If I patient who has active Crohn’s disease or ulcerative colitis that’s poorly controlled, I might not start them on a PI3K inhibitor. And if I have a patient who’s near dialysis because of chronic kidney disease, and I’m worried about further tumor lysis syndrome, I might not start them on a BCL-2 inhibitor.

So, you kind of weigh a patient’s medical history, their prior therapies, and their response and toxicities, and then make a decision on what’s the best fit for patients.

Katherine:                  

Well, what kind of testing is involved to make sure you have the best approach?

Dr. Mato:                   

Well, there are several tests that we think about using or we do use, and they’re mostly genetic and prognostic tests. And so, what we like to do is look at the CLL cells beyond looking at them under a microscope to try to identify the genetic markers that drive the biology of CLL. So, for example, if I have a patient who has deletion 17p which is one of the more feared chromosome abnormalities, I know right off the bat chemotherapy’s not a good fit for that patient. But I can do quite well with a BTK inhibitor like ibrutinib.