MPN Testing Archives

Testing is an ever-present part of the journey for Myeloproliferative Neoplasms (MPN), helping identify stage, treatment options, progress, and potential recurrence. Testing can also introduce a whole new vocabulary into your life. Don’t let jargon overwhelm you or undermine your grasp of test options and results.

More resources for Myeloproliferative Neoplasms (MPN) Testing from Patient Empowerment Network.

What Is a JAK2 Mutation?

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Editor’s Note: This resource, What is a JAK2 Mutation?, was originally published by MyHealthTeam.

One of the most commonly mutated proteins found in myeloproliferative neoplasms (MPNs) is the protein Janus kinase 2 (JAK2). This important discovery has changed how doctors diagnose and treat people with MPNs. We will be discussing both the JAK protein and the JAK gene.

MPNs are blood cancers caused by the overproduction of blood cells in the bone marrow. Mutations in the gene controlling JAK2 protein production occur most often in the three classic types of MPNs:

The V617F mutation in the JAK2 gene is found in:

  • 96 percent of polycythemia vera cases
  • 50 percent to 60 percent of primary myelofibrosis cases
  • 50 percent to 60 percent of essential thrombocythemia cases

Additionally, more than 50 different JAK2 mutations have been found in other parts of the JAK2 gene, primarily in PV cases.

What Is the JAK2 Gene?

The JAK2 protein plays an important role in controlling the production of blood cells from stem cells found in the bone marrow.

The JAK2 gene is responsible for genetically coding the JAK2 protein. This protein is part of the JAK/STAT pathway, which transmits signals to promote cell growth.

When the JAK2 protein is activated, it relays a signal to the protein STAT, which then binds to another STAT molecule in a process called dimerization. This group of molecules then moves into the cell’s nucleus, turning on genes that tell the cell to grow and proliferate.

What Causes JAK2 Mutations?

There are two main types of JAK2 mutations found in MPNs.

V617F Mutation

The V617F mutation is caused by a change in a single base in the genetic code. This simple change then switches the amino acid valine (V) to phenylalanine (F) at position 617 in the JAK2 protein, changing the shape of the protein. When this mutation is present, JAK2 signaling is turned on and cannot be turned off, leading to uncontrolled cell growth. In the case of MPNs, this causes an overproduction of blood cells, leading to blood cancers.

Multiple Mutations

Many different types of mutations can be found within multiple parts of the JAK2 gene. More than 50 different mutations have been identified in the gene, and almost all of these occur in people with PV.

One part of the JAK2 gene is particularly susceptible to mutations. This area genetically codes for a linker that connects two parts of the JAK2 protein. Common mutations here include deletions and insertions. A deletion is when entire pieces of the protein are lost. Insertions occur when incorrect pieces are put into the protein. Insertions and deletions change the shape of the JAK2 protein, which can affect its function.

Do JAK2 Mutations Cause MPNs?

MPNs are caused by a mutation in a single stem cell found in the bone marrow. These mutations cause the cell to rapidly divide, creating too many of one cell type. JAK2 gene mutations are involved in many cases of MPNs. In addition to JAK2 genes, mutations found in CALR and MPL genes are also common contributors to the development of MPNs. These three mutations are usually mutually exclusive, meaning that if one mutation is present, then the others are not.

JAK2 Mutations and MPN Diagnosis and Prognosis

A number of tests are required to diagnose MPNs, each providing a different piece of information. The doctor will begin with a physical examination and health history. They may also order a complete blood count (CBC) with a differential, which assesses the number of red blood cells, platelets, and white blood cells.

Because most MPNs are associated with a specific genetic mutation, a pathologist may use blood samples to test for these. Two tests used to identify genetic abnormalities are quantitative polymerase chain reaction (qPCR) and fluorescent in situ hybridization (FISH). Typically, only one of the two tests is required for diagnosis. It is also an option to perform DNA sequencing to identify the driving mutation in an MPN case.

Quantitative Polymerase Chain Reaction

Quantitative polymerase chain reaction (qPCR) is the most commonly used method for diagnosing JAK2 mutations. qPCR is also the most sensitive test, and it can detect small amounts of mutation when other methods fail.

With qPCR, DNA obtained from a blood test is mixed with a fluorescent dye, which is run through a machine that amplifies the sequences containing the JAK2 mutation.

Fluorescent In Situ Hybridization

This test determines whether someone has chromosomal abnormalities contributing to a cancerous phenotype. For example, one type of MPN, chronic myeloid leukemia (CML), is characterized by the presence of a Philadelphia chromosome (named for where it was discovered). A Philadelphia chromosome forms when two pieces of broken chromosomes stick together. This is also called the BCR-ABL1 gene, because one broken piece contains the BCR gene, and the other contains the ABL1 gene.

Most people with MPNs who are Philadelphia chromosome-negative (Ph-) have the V617F mutation in JAK2. This important discovery revealed the driving mutation behind Ph- MPNs. Before the discovery of JAK2 mutation, the cause of these defects was unknown. This also led to the development of specific JAK2 inhibitors for treatment of myeloproliferative disorders.

In 2016, the World Health Organization (WHO) revised its document “WHO Classification of Tumours of Haematopoietic and Lymphoid Tissues.” This revision included new criteria for diagnosing MPNs by the three main driver mutations in JAK2, CALR, and MPL genes. PV is characterized by the presence of a JAK2 mutation. ET and MF are characterized by the presence of any of the three driver mutations.

JAK2 Mutations and MPN Treatments

Since the discovery of JAK2 mutations in MPNs, researchers have developed a number of inhibitors targeting the protein. There are currently two JAK2 inhibitors approved by the U.S. Food and Drug Administration (FDA) for the treatment of MPNs:

Jakafi

Jakafi (ruxolitinib) is approved for treatment of MF hydroxyurea-resistant PV. It is also being investigated for use in people with hydroxyurea-resistant ET. Additionally, some trials are investigating the effects of Jakafi in combination with the antimetabolite chemotherapies Vidaza (azacitidine) and Dacogen (decitabine). Antimetabolites are a special type of cancer drug that interfere with DNA by acting as a substitute for the normal building blocks of DNA.

Inrebic

Approved in 2019, Inrebic (fedratinib) is the newest MPN drug in almost a decade. It’s used to treat three forms: high-risk MF, post-polycythemia vera MF, and post-essential thrombocythemia MF with splenomegaly (enlarged spleen).

Other JAK2 inhibitors are currently in phase 3 clinical trials, including Pacritinib for the treatment of MF and severe thrombocytopenia, and Momelotinib for the treatment of MF. These promising new drugs are in final phases of testing.

Overall, the discovery of JAK2 mutations in MPNs has helped advance drug research, development, and MPN treatment. It has also helped combat uncontrolled proliferation of blood cells, improving the lives of people with MPNs. New medications continue to be developed and tested, providing a hopeful future for those affected by myeloproliferative diseases.

Finding Support With an MPN

You are not alone living with an MPN. When you join myMPNteam, you gain a community of others who know what it’s like to face a rare blood cancer diagnosis.

Do you know whether your MPN has tested positive for a JAK mutation? Did your doctor explain what the results of the test mean for your condition? Share your experiences on myMPNteam.

Five Tips to Participate in MPN Care and Treatment Decisions

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How can myeloproliferative neoplasm (MPN) patients become more active in their care? In the “How Should You Participate in MPN Care and Treatment Decisions?” program, expert Dr. Abdulraheem Yacoub of the University of Kansas Cancer Center shares five key tips MPN patients can take for a more active role for optimal health outcomes.

1. Become a Patient Self-Advocate

It’s vital to have the ability to advocate on your own behalf no matter your age at diagnosis. And some MPN patients will be diagnosed at a relatively young age and will have different MPN care providers over the course of their disease. These patients need to get accustomed with the idea of care approaches changing over time.

2. Get Involved and Build Your Village

Being involved in your well-being as a patient is of utmost importance, and thinking about your support network is recommended as one of your early steps as a patient. Think about who among your friends, family, co-workers, and spiritual community might be able to help support you – and ask your MPN care provider about support resources if you need some additional help.

3. Bring a Friend or Loved One to Appointments

It’s important to have someone else at your appointments with you to help understand the information you receive and to also take notes and to ask questions if it’s helpful for you. Having a second set of ears is especially important with your early visits about treatment options, and the use of telemedicine makes it easier for loved ones to help support your appointments.

4. Get a Second Opinion

Second opinions are no longer the taboo that they were once perceived as. Listen to medical facts given to you from your MPN specialist and from your primary treating physician. And if you want a second opinion from another MPN specialist, this practice is easier to carry out now through telemedicine.

5. Seek Out Credible Resources and Research News

Keep yourself informed about the latest MPN research and treatment news by visiting credible online resources. In addition to PEN, check The Leukemia & Lymphoma Society (LLS) and MPN Research Foundation. The annual meetings of expert conferences like the American Society of Hematology (ASH) and American Society of Clinical Oncology (ASCO) bring research updates for MPN online resources to cover.

By taking a more active role in their care, MPN patients can help determine the best care and treatment plan for optimal health outcomes.

MPN Patient Profile: Robyn Rourick Part 2

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Read the first part of Robyn’s MPN journey here…

Picking up after 26 years of watchful monitoring of her myeloproliferative neoplasm (MPN), scientist Robyn Rourick was then referred for an allogeneic stem cell transplant by her MPN specialist, Dr. Gotlib. The transplant team started working through the matching process for a bone marrow transplant donor, which often begins with close biological relatives. Although Robyn’s only sibling wasn’t a transplant match, a person considered a near perfect transplant match for Robyn was found.

At that point in her journey, the possibility of entering a Phase II clinical trial called ORCA-1 was presented by Robyn’s transplant doctor. She discovered that the ORCA-1 treatment had the potential to completely eliminate graft-versus-host disease (GVHD). The clinical trial made sense to her. In Robyn’s trained scientific mind, she agreed that the trial was founded on sound scientific rationale with the potential for clear benefit and signed up for it. She researched other things like whether the transplant team could look at biomarkers to guard against graft-versus-host disease, but she decided to take the clinical trial path as her best option.

As for her feelings about the stem cell transplant, Robyn felt there was likely going to be a positive outcome for her due to the ORCA-1 clinical trial. Her knowledge about the trial really brought her a lot of comfort and put her at ease for the time she’d be around her family post-transplant. Robyn was lucky because her doctor was actually the primary investigator on the study. When he presented the transplant study as an option, that’s when she started to do more searching to find what patient advocacy groups were out there.

Looking back on her MPN journey, Robyn wishes that physicians would provide their patients with more patient advocacy resources, such as those available through organizations like Patient Empowerment Network (PEN). She feels fortunate that she discovered PEN through another patient advocacy website, and she firmly believes in PEN’s mission of empowering patients to gain knowledge to advocate on their own behalf. “I had the realization that in the clinical trial I was in, I was only the sixth patient, and the technology was stellar in terms of what we’re trying to do in terms of cell therapy. I just felt like patients need to know about the treatment advancements, and PEN is an excellent resource for learning about treatment and support options that I wanted to share my knowledge and patient experience with.” 

Robyn was fortunate to have a team of physicians in whose knowledge and treatment recommendations she could trust. She’s  tremendously grateful, because she knows it’s not always the case, and so offers this advice for others, “Make sure that you’re comfortable with your physicians. And if not, then move on. Don’t be afraid to reach out and to make other connections to other doctors, even across the globe. You shouldn’t hesitate to request a conference call with another provider to see if they’re aligned with your diagnosis and your watchful waiting or treatment recommendations. Patients must have the utmost confidence going through their cancer journey.”

As for the scientists who handled her sample in the ORCA-1 trial, Robyn was able to meet the scientists and saw the analytical data of her sample. She was highly impressed with the protocols that they used with the samples. Robyn was just the sixth myelofibrosis patient to join the trial. To have spent her life working on medicines for patients and then to be on the receiving end of this cutting-edge treatment for transplants made her feel very privileged. 

In her life post-transplant, Robyn has continued periodic blood work for routine monitoring and has been doing well. Two years following her transplant, Robyn’s myelofibrosis is in remission, and she has no evidence of fibrosis in her bone marrow. Her test numbers have been progressing nicely, and she hasn’t needed any additional treatment since undergoing the transplant. “I don’t have a single regret. I haven’t had a pimple, an itch, a scratch, absolutely nothing. My life has resumed exactly how it was before the transplant.”

In reflecting on her patient experience, Robyn offers this additional advice to other cancer patients, “Take a deep breath and give it some time to play out. The moment that I heard the word cancer and the risks with rapid progression, I had myself dead and buried. In my mind, what I needed to plan for was death. Prepare my family. Get everything in order. And to me, that was going to be the ultimate outcome. But then as things unfolded, I had conversations, did a little bit of research, and found out I did have some options. Things weren’t so negative in terms of progression and mortality. Don’t jump to the most negative outcome possible.”

MPN Patient Profile: Robyn Rourick Part 1

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Though Robyn Rourick is a scientist by training and works for a biotechnology company, she took a mind-body approach to her myeloproliferative neoplasm (MPN) journey. The time that passed between Robyn’s initial MPN diagnosis and when she finally needed treatment was incredibly – and nearly shockingly – long. She was diagnosed with essential thrombocythemia (ET) 26 years after elevated platelets were shown on a routine blood test. After she saw a hematologist, they performed a bone marrow biopsy and concluded she didn’t have myelofibrosis and received the ET diagnosis. Robyn recalls of the time of her diagnosis, “I didn’t know about myeloproliferative disorders. Not many people did at the time. Nobody mentioned that I could potentially have an MPN.” 

Robyn’s blood levels were monitored over the years, and her platelets started to decrease. Though she didn’t realize at the time, her platelets were decreasing because her bone marrow was becoming more fibrotic. She was also tested for the early gene mutations (JAK2) that were discovered as more MPN research occurred but tested negative . She later switched to another hematologist who was very tuned into the gene connections. He looked at Robyn’s medical data comprehensively and was extremely attentive to any minor changes. As her blastocytes began shifting, he urged her to go see MPN specialist Dr. Gotlib. Dr. Gotlib did further analyses and classified her as having myelofibrosis, noting that when she was diagnosed with ET that her original healthcare team also couldn’t have  ruled out pre-fibrotic myelofibrosis at that time. Fortunately, Dr. Gotlib stated if he had diagnosed her with her original blood test 26 years prior, he would have recommended to simply watch and wait while monitoring Robyn’s blood levels on a regular basis. 

Although Robyn felt healthy and had no symptoms besides an enlarged spleen, as Dr. Gotlib dug deeper into her genetic profile, he found a unique mutation that suggested she was at risk for an escalation into acute myeloid leukemia mutation. He recommended Robyn for an immediate allogeneic stem cell transplant for her MPN treatment.    

Robyn then learned that graft-versus-host disease (GVHD) was a major concern for the transplant process, which can be debilitating. So she began to seek patient advocacy resources to inform her MPN journey. “I felt desperate and wanted to meet people who had myelofibrosis who successfully came through transplant. I didn’t want to just talk to a transplant person with a different disease.” Robyn went through some patient connection programs – including Be the Match, Caring Connections Program, and Patient Power – and was able to meet a few people and became quite close with one patient. 

She learned that even though transplant will cure your disease, doctors don’t always elaborate with patients on the potential for a compromised lifestyle due to  graft-versus-host disease. Sometimes patients will come through transplant in worse condition than before the treatment. Robyn had major fears about going through transplant and being able to work and do her extracurricular activities post-transplant. “I felt like I was going to be a letdown for my family and colleagues and didn’t tell my work until I was preparing to go out on leave, which in retrospect was silly.” After telling her manager, Robyn was given complete support, and realized she could have avoided carrying so much anxiety.

“For me, self-education and advocacy are important to enable yourself to have conversations about what’s possible in terms of your treatment. You don’t have to develop an in-depth understanding, but enough to have the ability to be conversational. If you’re proposed a certain pathway, it’s good to know enough to ask why. And if you’ve done some research on your own, then you can ask why not an alternate treatment approach. I think it’s really important to have some knowledge, because it builds your confidence to be able to move forward with what’s being proposed.” 

“Give it time, allow yourself to digest the information, have conversations about it, and develop your own understanding. At first, I was very closed about my diagnosis. I told my immediate family, and I told one very close friend who had gone through autologous transplant. The more that I began to talk about it and the more that I included people in the story, the easier my journey became.” Robyn also saw a cancer therapist who made some really good points to her. “She told me that ‘we’re all going to die of something, but most of us don’t know what that really looks like.’” In Robyn’s case, she had the opportunity to learn more about her disease, guide it, and direct her journey. And that opened up a whole new perspective.

The cancer therapist walked Robyn through some exercises: “What is it you’re afraid of? What do you have control over? Allowing yourself to gain control over some things will build your confidence that you can do this.” Robyn also encourages other patients to engage their network of friends and family and realize that it’s okay to depend on people. It’s not your fault that you have this diagnosis. Getting over the apprehension of telling people about your diagnosis and embracing help from others are key pieces of advice.

Robyn views patient empowerment as essential to the patient journey. She discovered Patient Empowerment Network (PEN) through another patient advocacy website and felt it brought her MPN patient experience full circle in terms of learning what’s available. “As I’m learning more about PEN, I’m just dazzled by the different forums they have to enable knowledge transfer, support systems, and advocacy.” 

Read the second part of Robyn’s MPN journey here…

Updates from ASH: How Biomarker Testing Has Changed MPN Care

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Updates from ASH: How Biomarker Testing Has Changed MPN Care from Patient Empowerment Network on Vimeo.

MPN specialist, Dr. Andrew Kuykendall, discusses how the identification of specific biomarkers in myeloproliferative neoplasms (MPNs), such as the JAK2 mutation, have moved research forward. Dr. Kuykendall shares promising findings that were released at the 2021 American Society of Hematology (ASH) annual meeting and how this may impact MPN care in the future.

Dr. Andrew Kuykendall is an Assistant Member at Moffitt Cancer Center in the Department of Malignant Hematology. Dr. Kuykendall’s clinical and research efforts focus on myeloproliferative neoplasms (MPNs), MDS/MPN overlap syndromes and systemic mastocytosis (SM). Learn more about Dr. Kuykendall, here.

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Transcript

Katherine:

How has molecular or biomarker testing changed the field of MPN care and treatment?

Dr. Kuykendall:

Well, I think, first and foremost just understanding – going back to 2005 and knowing that we have JAK2 mutations. I think that gave really a lot of clarity to the diagnosis and really understanding the biology of how the disease acted through the JAK-STAT pathway. And certainly, that led to the understanding of MPL mutations and then calreticulin mutations.

We’re still figuring out exactly how calreticulin mutations work. There was a great abstract, a preclinical abstract, this year talking about the impact of interferon on calreticulin mutations and how that may differ from what we see in the impact of interferon on diseases that are driven by JAK2 mutations.

Clinically, we see a little bit of difference in how those diseases respond and we may understand a little bit better about why that happens. Additionally, that’s kind of gone down to looking at these big next generation sequencing panels where we identify high-risk mutations and that can certainly change our understanding of the prognosis of these diseases.

We’re starting to get, at least in the AML world, we’re getting targeted agents that can potentially target some of these mutations such as IDH1 and IDH2 mutations that have specific inhibitors.

Those are mutations that occur in myeloproliferative neoplasm patients and convey a worse prognosis, so there are ongoing trials looking to see if we can use those IDH inhibitors in myeloproliferative neoplasms either in the chronic phase or maybe in the more accelerated advanced phase.

You know the big thing, this meeting, was actually looking at polycythemia vera patients and what’s the relevance of the JAK2 mutant allele burden. I think this is something we’ve talked about a lot as far as how significant this is. We know in chronic phase myeloproliferative neoplasms that that JAK2 mutation tends to be associated with more thrombotic complications.

There are more blood clots in the veins and the arteries. There were a couple great abstracts that looked at the really the implications of the JAK2 mutation and the fact that it is associated with more thrombosis, but maybe more venous thrombosis. That might be a big risk factor for venous thrombosis and it may be that cardiovascular risk factors, such as diabetes, hyperlipidemia that’s really what’s driving the arteriole thrombosis. It also looked at the variant allele fraction, the number of cells that have that JAK2 mutation.

One abstract showed that if you have over a 50 percent allele fraction, if more than 50 percent of the alleles have the mutation – a higher burden of that mutation that’s associated with an increased thrombotic risk even in low-risk polycythemia vera patients. Whether or not that’s enough evidence to really change the paradigm of how we treat low-risk patients is to be determined, but I think very interesting and provocative work. 

Expert Advice for Finding an MPN Clinical Trial

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Expert Advice for Finding an MPN Clinical Trial from Patient Empowerment Network on Vimeo.

Dr. Andrew Kuykendall, an MPN specialist and researcher, shares tips for learning about available clinical trials. Dr. Kuykendall emphasizes the importance of seeking a consultation with a specialist and suggests questions to ask your provider about clinical trials.

Dr. Andrew Kuykendall is an Assistant Member at Moffitt Cancer Center in the Department of Malignant Hematology. Dr. Kuykendall’s clinical and research efforts focus on myeloproliferative neoplasms (MPNs), MDS/MPN overlap syndromes and systemic mastocytosis (SM). Learn more about Dr. Kuykendall, here.

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Transcript

Katherine:

How can patients find out about clinical trials? Are there specific questions that they should be asking their doctors about to participate in a trial?

Dr. Kuykendall:

Yeah. I think it’s tough. One way – there are a few different tools that I would recommend. One, if you’re very interested in just what trials are going on you can go to this national cancer trials, or NCT, network and try to understand online what trials are available. Clinicaltrials.gov is the actual website but that’ll show you the ongoing clinical trials that are there.

You can type in a disease state, so you can type in polycythemia vera or myelofibrosis or essential thrombocythemia, and it’ll give you a huge list of all the trials that are there. It can be kind of overwhelming because it’ll list all of the trials that have ever been done, but there are different ways that you can stratify those results and look for trials that are just recruiting that are active and that’ll taper down that list. And when you click on those trials there usually is at the bottom a list of participating centers that are there. So, you can see the different centers that are there. Overall, I think that that is a very broad way of doing it and somewhat complicated.

What I would ask is – and one of the things that we always push for is – while most of these myeloproliferative neoplasms can be treated quite easily in the community, meaning that the actual mechanisms of what’s being provided is not something that requires a specialized center. I think the understanding of the disease really does. We always recommend having someone in your corner who’s an expert. They don’t have to be the one who is most involved in your care but having someone in your corner who’s an expert.

That’s the person who’s going to know what trials are going on, what trials may be coming down the pipeline, where those trials may be occurring, and they might also tell you “Okay, here are the things that would prompt you to maybe want a trial.” I had a lot of patients that were surprised to realize there were trials available just because they had – they were getting six or seven phlebotomies a year. They were complaining about that but they figured that was just the ways things were. Lo and behold, there was actually a trial that was ongoing that was trying to reduce the need for those phlebotomies in otherwise low-risk patients.

You can always go to clinicaltrials.gov but also try to ask your doctor about hey is there, if you haven’t seen an expert, is there someone close by an expert that I can see for a second opinion just to understand the disease and ask about trials. Usually everyone’s okay with that and when you do see an expert, say “Hey, first of all what trials are right for me now and what in the future might be reasonable and how am I going to know and how often should I check in to see what things are available?” 

The Latest in MPN Research: Updates from ASH 2021

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The Latest in MPN Research: Updates from ASH 2021 from Patient Empowerment Network on Vimeo.

MPN specialist, Dr. Andrew Kuykendall, shares the latest news from the 2021 American Society of Hematology (ASH) annual meeting. Dr. Kuykendall discusses the latest findings in MPN research, including an update on JAK inhibitors, advances in BET inhibitors, as well as a new therapy in development aimed at reducing phlebotomy in patients with polycythemia vera (PV).

Dr. Andrew Kuykendall is an Assistant Member at Moffitt Cancer Center in the Department of Malignant Hematology. Dr. Kuykendall’s clinical and research efforts focus on myeloproliferative neoplasms (MPNs), MDS/MPN overlap syndromes and systemic mastocytosis (SM). Learn more about Dr. Kuykendall, here.

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Transcript

Katherine:

You’re joining us following the American Society of Hematology Meeting where cancer researchers came together to share their findings. Are there highlights from the meeting that patients should know about?

Dr. Kuykendall:

Yeah, absolutely. So, the meeting we just came from, the so-called ASH meeting, is really an annual meeting. Happens every December.

It’s really a chance for researchers to share their most exciting findings and really what they’ve been working on for the past few years, and certainly in the past year.

As a clinical researcher, I think I have always a keen interest in clinical trials that are going to give us some new data so we can see how things are working, but I think this is also a big meeting for pre-clinical studies for basic scientists who get to share what’s exciting in their labs. A lot of times that’ll give a preview of what’s to come maybe four, five years down the road what we’ll see on the clinical side. From the clinical side, which is more in my realm, there is certainly a few specific things to get excited about. Within the field of myeloproliferative neoplasms, we have polycythemia vera, ET – essential thrombocythemia, myelofibrosis.

And on the myelofibrosis side of things, I think we continue to get excited about just really the proliferation of drugs that are in late-stage clinical trials. This meeting was no different from that.

We started to get a little bit more clarity as far as this agent, pelabresib, which is a BET inhibitor which is being looked at really in a variety of different settings as a single agent in combination with ruxolitinib (Jakafi) and as an add-on to ruxolitinib as well.

This was another exciting need to get an update on where the data looks to be with pelabresib. Certainly, there’s an ongoing Phase III study in the up-front setting with that agent. We’re anxiously awaiting results too. Additionally, we’ve got more information regarding other JAK inhibitors that may be coming down the pipeline in the coming months to years with momelotinib and pacritinib.

Certainly, that’s always exciting to see the data come from there, especially when we get kind of further along in their trials, we start to get very isolated assessments of their data. Looking specifically at transfusion rates and the efficacy within the subpopulations that have unmet need. And so, I think that that’s always exciting.

I think polycythemia vera – this is a really big meeting for polycythemia vera. We obviously know that ropeginterferon (Besremi) just got FDA-approved in November.

We also started to see the updated data with rusfertide, or PTG-300, which is a hepcidin memetic that aims to reduce phlebotomy rates in patients that are requiring a ton of phlebotomies which, as we know, can be very impactful on quality of life having to get recurrent phlebotomies.

I think that those were the really big highlights, and the take-aways from this is really we are starting to see these agents move into the late-stage clinical trials.

MPN Research and Optimism About Curative Therapies

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MPN Research and Optimism About Curative Therapies from Patient Empowerment Network on Vimeo.

Myeloproliferative neoplasm (MPN) researcher Dr. John Mascarenhas discusses why he’s excited about the future of care for patients with essential thrombocythemia (ET), polycythemia vera (PV), and myelofibrosis (MF).

Dr. John Mascarenhas is Associate Professor of Medicine at the Icahn School of Medicine at Mount Sinai (ISMMS) and the Director of the Adult Leukemia Program and Leader of Clinical Investigation within the Myeloproliferative Disorders Program at Mount Sinai. Learn more about Dr. Mascarenhas, here.

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Transcript

Katherine Banwell:

Before we close, Dr. Mascarenhas, let’s talk about research. Are there new developments that you’re excited about?

Dr. Mascarenhas:       

Absolutely. So, what I’m heavily interested in and involved in is clinical investigation and moving the field forward, and there are many people out there that are similarly involved and they’re doing really excellent work. So, I am super jazzed and enthusiastic and optimistic, and it’s what gets me work every day and inspires me is all of the effort that is happening. And, it’s a continuum. So, it’s not just one person trying to try a different drug here and there. It’s really a bringing together of many different people because these are rare diseases.

Many different people from many different institutions that have different areas of expertise, but have a common goal of translating from laboratory informed data, so, not just taking a dart and throwing it at the dartboard and hoping it sticks. But actually taking data that we learned from the lab and leveraging that information to develop therapies that are informed, that are targeted, that are personalized and going through a process of evaluating them to get them into the clinic, with the goal of, and I would say ambitiously, our goal these days is moving beyond trying to make patients feel better, which is an important goal, but it’s really can we really target the disease in a more effective way to induce remissions, to, dare I say, cure patients. So, I think the ambitious goal of the clinical investigators and laboratory investigators that are active in MPN research today is really one looking for an understanding at the basis of the biology of the  disease to develop curative therapies. And, I am optimistic that that will happen.

And, I don’t mean happen in a hundred years from now. I mean happen in our lifetime. So, that’s where we’re going. There’s a lot of very exciting drugs, oral and intravenous drugs and they target very different types of aspects of the disease, and I think patients and physicians will see that maybe those drugs are used best in combination. So, the idea of using one drug, waiting for it to fail and using another drug is really old news, and much of oncology is combination therapy. So, taking drugs that have different targets or mechanisms of action and non-overlapping toxicity to try to better target and delete what’s called the myelofibrosis stem cell that’s the basic issue here, which we don’t effectively delete other than transplant. So, our goal would be to put bone marrow transplanters out of business.

 

What To Expect When Starting MPN Inhibitor Therapy

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What To Expect When Starting MPN Inhibitor Therapy from Patient Empowerment Network on Vimeo.

Changing a treatment approach for your essential thrombocythemia (ET), polycythemia vera (PV), or myelofibrosis (MF) can be intimidating. Dr. John Mascarenhas, a myeloproliferative neoplasm (MPN) specialist, shares tips and advice for beginning a new therapy.

Dr. John Mascarenhas is Associate Professor of Medicine at the Icahn School of Medicine at Mount Sinai (ISMMS) and the Director of the Adult Leukemia Program and Leader of Clinical Investigation within the Myeloproliferative Disorders Program at Mount Sinai. Learn more about Dr. Mascarenhas, here.

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Transcript

Katherine Banwell:

And we have another question from Craig that we received earlier. “I’m currently receiving regular phlebotomies for PV, but my doctor is considering switching me to inhibitor therapy. What can I expect, and are there side effects that I should be concerned about?”

Dr. Mascarenhas:       

So, for some patients, therapeutic phlebotomy is all that they need, and they do very well with it, and they don’t need to take a therapeutic like a JAK inhibitor or hydroxyurea, which is a non-specific treatment.

But some patients do. So, some patients where if their risk score is higher and their risk for thrombosis, that may be an appropriate indication. And some patients have a lot of symptoms with their PV. So, not all PV patients present and behave the same way. Some patients have a very low symptom burden. Some patients have a very significant symptom burden. Itching, for example can be a very annoying and very troublesome symptom for patients with PV.

And, if you don’t have PV or you don’t know someone with PV, you may not understand or realize the negative impact of having intractable itching, often associated with taking a shower or warm water.

And, that can really detract from quality-of-life and cause a lot of anxiety. So, that’s an example of where sometimes a JAK inhibitor like ruxolitinib can be really lifesaving in terms of restoring quality-of-life and functionality to a patient.

Usually, drugs like ruxolitinib are very well-tolerated too, which we’re fortunate about. There’s not a lot of toxicity associated with them. So, for example, nausea, vomiting, diarrhea, hair falling out with chemotherapeutics, you really don’t see with ruxolitinib or Jakafi. Easy bruising, headaches and some dizziness up front sometimes may be seen. They’re usually low-grade and they’re usually fleeting. And usually, the benefit, the feel-good aspect of it outweighs toxicity that can be seen with the drugs. They are immunomodulatory drugs. So, ruxolitinib or Jakafi may increase, to some small extent, but likely, real extent, infectious complications like shingles, urinary tract infections, upper respiratory infections. So, sometimes there is this increased risk. It’s often outweighed by the benefit of the drug.

But there are risks that are associated, and of course the results are not guaranteed. So, I always warn patients, be careful when you look at the package inserts or talk to the physicians. Risks are risks. They’re not guaranteed. So, most patients don’t have these toxicities, but one is at risk for toxicity whenever they take any medication.

An Overview of ET, PV and MF Treatment Options

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An Overview of ET, PV and MF Treatment Options from Patient Empowerment Network on Vimeo.

Treatment for essential thrombocythemia (ET), polycythemia vera (PV), and myelofibrosis (MF) can vary greatly. Dr. John Mascarenhas breaks down the treatment types and the goals of treatment for each type of myeloproliferative neoplasm (MPN).

Dr. John Mascarenhas is Associate Professor of Medicine at the Icahn School of Medicine at Mount Sinai (ISMMS) and the Director of the Adult Leukemia Program and Leader of Clinical Investigation within the Myeloproliferative Disorders Program at Mount Sinai. Learn more about Dr. Mascarenhas, here.

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Transcript

Katherine Banwell:

Depending on the patient, it seems like ET or PV may be easily managed. So, how are they treated? Let’s start with essential thrombocythemia or ET.

Dr. Mascarenhas:       

So, ET is a disease in which first and foremost, we’re trying to reduce the risk of thrombosis, clotting, and/or hemorrhage bleeding. So, typically, ET patients are risk stratified by low risk or high risk.

It’s almost simply based on their age, whether they’ve had a clot in the past, and some systems now even incorporate other factors like mutation status. And, you tailor the treatment based on their risk score. So, low risk ET patients don’t necessarily need to be treated. They can be followed expectantly and watched. The height of the platelet count does not predict thrombotic risk. So, we don’t treat the platelet count per se. A high-risk patient is at high risk for clotting. So, these patients almost invariably are getting aspirin at a baseline, and they are often on cytoreductive therapy. And sometimes, that is chemotherapy like hydroxyurea. Sometimes it’s a non-chemotherapeutic option and like anagrelide, and sometimes it’s a biologic therapy like interferon alfa either 2a, Pegasys, or 2b ropeginterferon. And, these are therapies that have rationale, that have clinical data, that have demonstrated reduction in risk of clotting, which again is the reason why we treat high-risk ET patients.

Katherine Banwell:                  

And, what about PV, polycythemia vera?

Dr. Mascarenhas:     

So, in polycythemia vera, it’s similar to ET. We risk stratify patients low and high risk based on age and clotting histories. And whether you’re low or high risk, we give PV patients aspirin or at least once daily, and we look to keep their hematocrit below a threshold of 45 percent. And sometimes in women, we even go lower, to 42  percent. But the idea is that controlling the hematocrit, which is one of the red blood cells indices, you reduce the risk of having clots, and that’s been shown actually many years ago and reinforced in a very well-known study called the CYTO-PV study in Italy documented that if you keep the hematocrit less than 45 percent, so, stringent control versus allowing for less stringent control between 45 to 50, that you reduce by fourfold the number of cardiovascular events that can occur.

So, we know that controlling the hematocrit is important, and that can be done, again, with hydroxyurea, interferon, and ruxolitinib.

The JAK2 inhibitor has also proved specifically for patients who had an intolerance or refractory hydroxyurea, but also importantly as a drug that can address, probably better than most drugs in this field, the symptom burden that could be problematic for some of those patients. But, it’s really about controlling the hematocrit.

Katherine Banwell:                  

Yeah. Since myelofibrosis is a progressive condition, I imagine that makes it more difficult to manage. So, what else is available for patients with myelofibrosis?

Dr. Mascarenhas:       

The first line of treatment is typically a JAK inhibitor, although I would say that there are a subset of patients – well, there are patients we sometimes meet that have very low risk disease. They don’t have those clinical variables we discussed before that could uptick their risk score, and some of those patients can be watched.

And interestingly, there are a subset of patients that can have an indolent or slow form of the disease where they don’t have aggressive changes in their disease, their blood counts, their symptoms, their spleen, and don’t need immediate treatment. Most patients would benefit from a JAK inhibitor, although there are a subset of patients where their issue is less simple in spleen burden and it’s more anemia.

So, we take those patients where anemia’s the focus, we look at their erythropoietin level, which is their endogenous hormone level that regulates red blood cell production. If it’s low, we give them a lab-based form of erythropoietin, something called Procrit or Aranesp. If it’s high, we will move on. We can use a drug called danazol, which is a synthetic male androgen which can improve hemoglobin levels in 20 to 40 percent of patients. Or, we can use a drug called lenalidomide, which is an immunomodulatory drug. And, more recently, there’s a drug in testing called to luspatercept, which is an active activin receptor ligand trap. So, there is a growing armamentarium of drugs that can be used to try to alleviate the anemia which is present and can be a significant issue in about a quarter of patients with myelofibrosis upfront at time of diagnosis or about 75  percent through the course of their disease. So, that’s an unmet need that still requires attention and may alter the treatment plan for a given patient.

Katherine Banwell:                  

What about stem cell transplants?

Dr. Mascarenhas:       

So, we relegate stem cell plant transplants for those patients as mentioned before that are higher risk because we think that the potential benefit-to-risk ratio is in favor of transplant.

Transplant is really a modality that is the only modality that offers the potential for cure, but it’s also a modality that poses a significant risk of morbidity and mortality associated with it. So, it has to really be taken very seriously. It can’t be the kind of treatment you would think of as a last resort at the last minute. Once you see a transplanter, if they’re interested in that therapy and see it early on in the disease course, in my opinion, to start that dialog and then figure out when is the optimal time to employ a bone marrow transplant, which is not a surgical procedure. It’s often thought to be surgical. It’s not a transplant of an organ. It’s a transplant of hematopoietic cells. So, it’s really an infusion of stem cells that then end up in the person’s bone marrow, and they create a whole new hematopoietic system and immune system. And with that, you can have an immune system that then goes after the myelofibrosis stem cells.

That’s called graft-versus-leukemia effect. But with that included graft-versus-host disease, which is when the new graft, the new immune system doesn’t always recognize well the person’s own tissues, whether it’s the liver, or the lung, or the skin, and you can have immunologic reactions to that.

So, that’s a complex discussion. But, transplant, typically for patients less than 70 years of age who have high-risk myelofibrosis or even up to 75 if they have a good performance status and as we said don’t have a lot of comorbid issues with a goal of cure. So, if you have someone where their goal is to try to maximize their time out of the hospital and they’re not focused on longevity, their focused on quality of life, that may not be an appropriate patient for transplantation.

So, I think a very upfront, honest and a transparent discussion with the patient about what to expect with transplant, what are the pros and cons, what are the risks involved, and importantly does it match up with their expectations or their desires.

What Are the Benefits of MPN Inhibitor Treatment?

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What Are the Benefits of MPN Inhibitor Treatment? from Patient Empowerment Network on Vimeo.

MPN expert Dr. John Mascarenhas shares an overview of how inhibitor therapy works to treat myelofibrosis (MF) and the benefits of this type of treatment.

Dr. John Mascarenhas is Associate Professor of Medicine at the Icahn School of Medicine at Mount Sinai (ISMMS) and the Director of the Adult Leukemia Program and Leader of Clinical Investigation within the Myeloproliferative Disorders Program at Mount Sinai. Learn more about Dr. Mascarenhas, here.

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Transcript

Katherine Banwell:

Dr. Mascarenhas, what is inhibitor therapy and how does that work?

Dr. Mascarenhas:       

So, inhibitor therapy in general are usually oral drugs for the most part, small molecule inhibitors that are geared and usually specific but not totally specific because then they can have off-target effects, but geared to inhibiting usually an enzyme that is overactive or is contributing to the pathophysiology of the disease.

I think in MF, probably one of the best examples is a JAK2 inhibitor. So, there are a number of JAK2 inhibitors that have been in clinical testing. There are two that are approved, ruxolitinib and fedratinib which are excellent drugs in inhibiting JAK2 protein itself in the cells that could be either upregulated or hyperactive in the signaling pathway, and it quiets down a signaling pathway in the hematopoietic cells that leads to a lot of the manifestations of the disease, namely symptoms and spleen.

So, one of the clear benefits of JAK inhibitors that was established many years ago and reinforced by multiple drugs that are either approved or in late-stage testing is these drugs are excellent in improving the symptom burden in the patients and reducing their spleen. Unfortunately, as a class, we’ve not seen these drugs induce remissions or cure patients. So, there’s still interest in developing, obviously, non-JAK inhibitor therapies. But inhibitors in general are inhibiting proteins that are either inappropriately activated or part of a cascade of signaling molecules that are contributing to the disease.

And they are not chemotherapeutic, which might be an important point to make. In past days, we’ve relied heavily in hematologic malignancies in using chemotherapies which are nonspecific and just kill dividing cells whereas inhibitors typically are targeted, and in some sense, it’s personalized to the disease with toxicity profiles that are usually quite distinct from the traditional chemotherapies that we use.  

 

How Do MPNs Progress From One Disease to the Next?

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How Do MPNs Progress From One Disease to the Next? from Patient Empowerment Network on Vimeo.

Understanding how essential thrombocythemia (ET), polycythemia vera (PV), or myelofibrosis (MF) are connected may be confusing to patients. Dr. John Mascarenhas, an expert in myeloproliferative neoplasms (MPNs), provides an overview of how the conditions are defined and how they may progress from one condition to the next.

Dr. John Mascarenhas is Associate Professor of Medicine at the Icahn School of Medicine at Mount Sinai (ISMMS) and the Director of the Adult Leukemia Program and Leader of Clinical Investigation within the Myeloproliferative Disorders Program at Mount Sinai. Learn more about Dr. Mascarenhas, here.

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Transcript

Katherine Banwell: 

As we move through today’s program, which is going to cover the three classic MPNs, polycythemia vera, essential thrombocythemia and myelofibrosis. So, for someone who has one of these conditions, can you help us understand how one may progress to the next?

Dr. Mascarenhas:

So, these are a very heterogeneous or variable group of diseases that are under an umbrella called the myeloproliferative neoplasm. So, MPNs can really present and behave and have very different clinical courses. So, I think it’s very important for patients to realize that these are rare diseases, that that has a complexity to it because they don’t always have the ability or the privilege to know other patients or people in their lives that may have these diseases. So, it could be very frightening from a level of feeling isolated or alone with a diagnosis like this and not having familiarity, but also, that these are vague diagnoses in the sense that when you have breast cancer, one can kind of conceptualize that there is a mass in the breast, for example, and that that can be staged. It can go to the lymph nodes in the armpit, it could spread below. And people can kind of understand that concept. I think it’s a little bit more challenging when you talk about MPNs because it’s a little bit more abstract.

These diseases are within the bone marrows at diagnosis. So, they’re not staged in a physical way, and they are complex because they can lead to high blood counts, low blood counts, different types of symptoms, and the approaches really have to be personalized. They are all three interrelated because there are commonalities. So, there are certain clinical commonalities and also biologic commonalities. So, for example, the JAK2 mutation, the JAK2V617F mutation is seen in all three diseases. So, it’s not specific to one or the other.

It’s more common in polycythemia vera, but in about 50 percent of patients with ET, and 50 percent of patients with MF, you can see this mutation. So, the mutation alone doesn’t really tell us what the disease is. It just tells us you have one of these diseases. And, there are other mutations. So, a bone marrow biopsy then becomes integral in helping subtype the patient and then create that treatment plan and that outlook that’s specific for that disease.

And as you mentioned, to make it even more complicated, these diseases can overlap not just biologically, but in a continuum. So, patients with ET or polycythemia vera can progress in some cases to myelofibrosis. And, all three diseases in a minority of patients can progress or evolve into acute myeloid leukemia, which is a more aggressive form of bone marrow cancer.

Patient Considerations That Impact MPN Treatment Decisions

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Patient Considerations That Impact MPN Treatment Decisions from Patient Empowerment Network on Vimeo.

How can personal choices play a role in your MPN care? Dr. John Mascarenhas reviews factors that should be considered, including lifestyle and overall health, when choosing therapy for essential thrombocythemia (ET), polycythemia vera (PV), or myelofibrosis (MF).

Dr. John Mascarenhas is Associate Professor of Medicine at the Icahn School of Medicine at Mount Sinai (ISMMS) and the Director of the Adult Leukemia Program and Leader of Clinical Investigation within the Myeloproliferative Disorders Program at Mount Sinai. Learn more about Dr. Mascarenhas, here.

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Transcript

Katherine Banwell:

Outside of testing, what other factors should be considered when choosing treatment?

Dr. Mascarenhas:       

I think patient expectation. So, sometimes physicians and family will impose what they want for a patient, and that may not be what the patient really wants. So, I have learned over the years that it’s crucial to make sure that you understand the patient and what the patient’s expectations, desires, and that’s influenced by the life they’ve lead or the remaining life that they want to live and their own personal religious and spiritual beliefs.

So, I think knowing your patient and understanding what their expectations are, it’s fundamental, and sometimes, it’s overlooked. So, understanding that, I think, is very crucial. And then, dividing what are the objectives of the treatment in a given patient? Is it really to improve anemia in some patient versus perhaps a different patient, it may be to improve their quality of life and reduce their symptom burden. And then in other patients, it may be purely trying to cure the disease with therapies that may be aggressive, which may not be appropriate for an older patient where toxicity could outweigh any potential benefit of survival or longevity. So, you really have to have a discussion with the patient or caregivers, and then define what are the goals in that individual to personalize that approach for that patient.

Katherine Banwell:                  

Right. Right. And, there’s the patient’s overall health, comorbidities, other things like that?

Dr. Mascarenhas:       

Yeah, because we are not treating a disease in isolation usually. So, patients come with baggage posed of past diseases, current diseases.

And sometimes patients are not “fit” for certain types of therapies because they may be sick or they may have organ dysfunction that would make certain types of treatment approaches ill-advised because the toxicity could be higher. So, absolutely, you need to know their comorbid index, how much comorbidities they have and also their performance status, how active and how well they are in general.

Katherine Banwell:                  

Are there specific biomarkers that may affect prognosis or treatment?

Dr. Mascarenhas:       

So, yes and no. I mean, I think that’s an area of intense interest and research. So, we have identified certain biomarkers that have, as I mentioned, prognostic significance, and that may influence treatment decisions. So, patients who have, for example, as we discussed next-generation sequencing and we see their mutations that are present, if they have an accumulation of high molecular risk mutations, that may give us a sense that perhaps that patient may not enjoy the full benefit and duration of benefit of, for example, a JAK inhibitor as another patient that has a less complex disease.

And, that doesn’t necessarily mean that the therapy is not appropriate for the patient. But it may help us plan and be prepared to move on to the next therapy sooner or to be more vigilant for changes that would tell us it’s time to move on. So, I think they help us maybe get a general sense of things and put things into perspective. They don’t always necessarily inform us on a change in therapy immediately or the next or the most immediate therapy. But I do think that that will change because I would predict in the next five to 10 years, I think that the number of available drugs for myelofibrosis, for example, will likely double from what it is now. I think we will have an armamentarium to choose from, and what we will learn from trials that are ongoing is there may be certain profiles, mutations, chromosomal profiles, other clinical variable profiles that we will learn from these trials that will help us to find upfront, “Well, this profile really should go with his medication. That profile should go with that medication.”

An early of example that would be we’re learning that not all patients with the JAK2 mutation are created equal, that you can have different burdens of JAK2 mutation.

And, patients with low burden JAK2 mutation, for example, may fare better with up a specific JAK to inhibitor like pacritinib than patients who get treated with other JAK inhibitors like ruxolitinib.

So, there are differences even within patient defined by mutation that may help us predict which of the JAK inhibitors, as an example, may be more appropriate as a first-line therapy. So, I think that will evolve more so over the next five to 10 years.

What Questions Should Patients Ask About MPN Test Results?

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What Questions Should Patients Ask About MPN Test Results? from Patient Empowerment Network on Vimeo.

What should you know about your MPN test results? Dr. Mascarenhas discusses how test results are used, including the importance of genetic mutations and risk stratification when analyzing results.

Dr. John Mascarenhas is Associate Professor of Medicine at the Icahn School of Medicine at Mount Sinai (ISMMS) and the Director of the Adult Leukemia Program and Leader of Clinical Investigation within the Myeloproliferative Disorders Program at Mount Sinai. Learn more about Dr. Mascarenhas, here.

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Transcript

Katherine Banwell: 

Some patients may not know if they’ve received these important tests. So, what key questions should they ask their physician about testing?

Dr. Mascarenhas:       

Well, I think it’s important that the patients feel empowered to understand sort of where the field is and what key questions you would ask a physician, hematologist who’s taking care of you. So, I think all patients should be aware of their diagnosis, the name of the diagnosis, the subtype, but also do they have any of the key driving mutations, the JAK2 mutation, the calreticulin mutation, the MPL mutation, and that’s usually done off of a bone marrow biopsy sample, but it can be done off peripheral blood. And, they may not always know that it’s done. So, I think having a discussion with the position to understand there are criteria that exist called the World Health Organization criteria that are updated frequently and should set a standard throughout the world of how you diagnose and establish these diagnoses.

So, I think it’s important for physicians to be able to convey to the patients with confidence, “We follow these criteria and you have these criteria and we’ve done this testing that shows that you have these mutations.” And not just regurgitate what they found, but help them understand and navigate with that means, which again, I will point out that sometimes we don’t know. But, I think it’s important for physicians to convey sometimes that some of the findings that they may see, for example, patients look on portals these days and they can look at their labs and stuff like that. And, we don’t always have a terrific answer or an informed answer for everything that we get back. And, we will potentially in 10 years from now, but sometimes at the moment, we don’t. But, I think a discussion about the meaning of the labs that are obtained is probably good for the patient to understand what’s being done.

Katherine Ba:nwell:

Absolutely. It sounds like each person’s situation is unique and should be considered before making any treatment choices. Can you talk about how the results of these tests may affect prognosis and treatment?

Dr. Mascarenhas:     

So, we do have risk stratification systems that we use for essential thrombocythemia, polycythemia vera, and myelofibrosis. I’ll talk about myelofibrosis because that’s probably a little bit more of a complex and sophisticated model. It’s also changing, and we update it frequently. And, these models are imperfect, so I always warn patients to not put all of their money in one basket when we talk about risk stratification. They broadly help us understand where a patient is in their disease course. So, for example, in myelofibrosis, historically, the DIPSS, the Dynamic International Prognostic Scoring System is used, which considered five clinical variables that have been shown to be independently prognostic. So, at age over 65, the presence of blasts or circulating immature cells in the peripheral blood, anemia, hemoglobin less than 10, symptoms, fevers, night sweats, weight loss or a high white count over 25,000, you those points up.

And patients can do this online. There are calculators that you can calculate your DIPSS score. And, you’ll see that there are four different risk groups that range from low risk to high risk, and they are associated with median survivals. We now know that mutations influence those, have influence on prognosis. So, there are a group of high molecular risk mutations like ASXL1, SRSF2, IDH1/2. So, there are mutations that also have prognostic significance, and we incorporate them into the decision-making.

And, essentially, and this is where I think patients have to be very careful, physicians have to be very careful with conveying this. With these risk models whether they are clinical variable risk models or these integrated molecular risk models, each category is associated with a median survival, that’s based on retrospective studies. But that doesn’t tell the patient specifically what they should expect in terms of survival. And, I always fear that patients, when they look at these things, or even physicians when they convey them that they may inadvertently misrepresent or convey what those really mean.

And, I think the purpose of those risk stratifications is really to help guide a risk adapted treatment approach that’s reasonable and is weighted for benefit to risk of the disease. So, for example, if you have advanced disease with a high-risk score of intermediate to or higher, bone marrow transplant in certain patients may be a warranted therapy to consider. So, they really help inform treatment.

 

Which Tests Do You Need Following an MPN Diagnosis?

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Which Tests Do You Need Following an MPN Diagnosis? from Patient Empowerment Network on Vimeo.

After a diagnosis of essential thrombocythemia (ET), polycythemia vera (PV), or myelofibrosis (MF), what testing should take place? Dr. John Mascarenhas shares an overview of essential and in-depth testing for patients with myeloproliferative neoplasms (MPNs).

Dr. John Mascarenhas is Associate Professor of Medicine at the Icahn School of Medicine at Mount Sinai (ISMMS) and the Director of the Adult Leukemia Program and Leader of Clinical Investigation within the Myeloproliferative Disorders Program at Mount Sinai. Learn more about Dr. Mascarenhas, here.

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Transcript

Katherine Banwell: 

What tests are necessary to help understand a patient’s specific disease at diagnosis?

Dr. Mascarenhas:

Usually, the blood counts are the first opening door test that allows some understanding of, again, either an abnormal production of red blood cells, platelets or under production of these cells. And, that’s really where often the evaluation begins. And then, there are further blood tests that often are done.

And I would say almost indefinitely or almost definitely one should have a bone marrow biopsy that helps categorize the type of myeloproliferative neoplasm because there can be overlap in how the blood counts can look from one disease to the next and overlap in the mutations like the JAK2 mutation. So, sometimes, the blood counts and the molecular testing are not enough, and a bone marrow biopsy looking under the microscope at the different types of cells, the proportion of cells, whether there’s fibrosis where there’s others other types of cells that shouldn’t be there and they’re looking at the chromosomes and the flow cytometry, these are associated tests. As well as almost probably anywhere anyone goes at this point, they’re going to get next-generation sequencing, which is looking at multiple genes and mutations, and that gives a more broader, deeper sense of the disease.

So, those really become the integral parts. In some cases, patients will end up getting imaging of their abdomen to see if they have an enlarged spleen or enlarged liver.

Although that’s not always necessary, that is often part of the workup. So, it’s bloodwork, it’s bone marrow biopsy, sometimes imaging is usually the cornerstone.

Katherine Banwell: 

And, what is molecular or biomarker testing?

Dr. Mascarenhas:    

So, molecular testing today really means – at one point, it really meant looking at PCR for specific gene mutations.

So, for example, we would look at the JAK2 and we would say, “In a given person, is this gene mutated?” We all have JAK2 gene, but in patients with these diseases, they’re more commonly mutated which means altered in the blood cells. And, it’s very important for a patient to understand not in every cell in their bodies, but in their blood cell compartment. And, that helps us understand and start characterizing their disease, and sometimes that mutation can be measured. It can be at a low level. It could be a high level. And, that’s all put together in trying to understand the molecular basis of these diseases.

Today, next-generation sequencing has really taken over and that’s looking at more than just one gene.

Its sequencing could be 40 genes, it could be 200 genes, to get a sense of the complexity of the disease and looking for certain mutations which are considered biomarkers that can portend prognosis or I think increasingly, we’ll see may inform treatment decisions and may even be targets themselves of therapies.

Katherine Banwell:              

Right. Should all patients diagnosed with ET, PV, or MF undergo biomarker testing? Is that necessary?

Dr. Mascarenhas:       

I would say it’s part of the modern evaluation and management of patients today. I don’t think that that was true 10 years ago. But, I think the field has matured. I will say I’m the first person to acknowledge to patients that we get a lot of information back, and the truth is we don’t often know what to do with all of that information. So, sometimes we get information back that can cause anxiety because you can see mutations in genes. But they don’t always inform us on how to educate the patient about their disease or tell us what to do with the treatment.

So, there is still a lag as there normally would be between the testing of the results that we get, and then the actual knowledge of what to do with that. And, that’s still a process that’s in evolution.