Role of JAK2 in Polycythemia Vera

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Role of JAK2 in Polycythemia Vera

How does the presence of the JAK2 V617F mutation affect the diagnosis and classification of myeloproliferative neoplasms?

 

Dr. Richard: The JAK2 V617F mutation is found in > 90% of patients with polycythemia vera (PV). The remaining patients with PV have mutations in a different portion of the JAK2 gene. Since JAK2 mutations are found in virtually all patients with PV, having the mutation helps make the diagnosis, but does not carry prognostic significance. Some studies suggest that the allele burden of the mutated JAK2 V617F could be used to identify aggressive disease, but that finding is not universally accepted across all health care entities or practitioners. Variations in acceptance may be due to factors such as evolution of knowledge based on the latest evidence, clinical practice variability and priorities, availability of testing, and complexity of disease management.

 

This is not true of the 2 other classical myeloproliferative neoplasms (MPNs) that we see commonly in our clinics: essential thrombocytosis (ET) and myelofibrosis (MF). The CALR mutation can be seen in patients with ET and MF and signals a less aggressive form of the disease.

 

The presence of JAK2 V617F is critical for prognosis. Although it does not directly help to inform the patient of what to expect, identifying the mutation provides us with important information about the patient’s prognosis, which helps guide treatment decisions such as the intensity of therapy and monitoring for thrombotic events.

 

What are the potential implications of the JAK2 V617F mutation in the treatment of PV?

 

Dr. Richard: The discovery of the JAK2 V617F mutation in MPNs in 2005 led to the hope that perhaps there would be targeted therapy that could result in disease remissions. We had all hoped that the spectacular responses observed in patients with chronic myelogenous leukemia (CML) treated with imatinib could be replicated with JAK2 inhibitors. It turned out that blocking JAK2 was insufficient to reverse the disease. Studies are still ongoing whether drugs that can decrease the JAK2 V617F allele burden could be used to achieve a type of remission. Perhaps combination therapies will need to be developed.

 

I am hopeful that in the future we do see advancements that provide improved diagnosis and monitoring to help facilitate early detection, personalized treatment approaches to offer more effective and well tolerated therapies, risk stratification and prognostication to help identify higher risk progression, combination therapies to possibly improve efficacy and adherence, and novel therapeutic targets to help discover new treatments and provide improved outcomes.

 

How can JAK2 V617F lead to 3 different forms of myeloproliferative neoplasms?

 

Dr. Richard: The short answer is no one knows exactly. The phenotypic differences between PV and the other 2 MPN variants are most likely determined by the integration of other signaling pathways that are activated by the corresponding driver mutation, and interactions with other mutations. What also seems to matter is the sequence in which the individual mutations are acquired.

 

There have been documented cases of post-polycythemic leukemia that no longer have the JAK2 V617F mutation. However, at some point that mutation was lost, and the cells acquired other driver mutations that resulted in leukemia.

 

What we do know now is that there are several potential interactions that can coexist with JAK2 V617F. There is MPL mutation, which contributes to disease pathogenesis and thrombotic risk. Independent of JAK2 V617F pathways is CALR mutation, which is another driver of MPNs. In addition are other JAK mutations, epigenetic alterations, and microenvironmental factors. All of these have the potential to influence clinical manifestations by impacting clinical outcomes, affecting expression patterns and signaling inflammation within the bone marrow microenvironment.

 

Are there any ongoing research efforts or clinical trials exploring targeted therapies that specifically address the JAK2 V617F mutation in patients with PV?

 

Dr. Richard: The ongoing research efforts to address JAK2-targeted therapies are looking at options like novel JAK inhibitors, combination therapies, resistance mechanisms, improved safety profiles, biomarker identification, exploring new indications, and preclinical studies that involve the development and testing of new JAK inhibitors.

 

Other JAK2-targeted therapies continue to be in development. At this time, we have ruxolitinib, pacritinib, fedratinib, and momelotinib. None of them appear to be a magic bullet the way imatinib was with CML. Perhaps a better disease comparison is chronic lymphocytic leukemia (CLL). In CLL, targeted therapies against Bruton tyrosine kinase and BCL2 are being combined to result in many years of disease control. JAK2 inhibition may need to be combined with another active drug, perhaps against a mutation or pathway that has not yet been identified.

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Robert E. Richard, MD, has disclosed no relevant financial relationships.

How does the presence of the JAK2 V617F mutation affect the diagnosis and classification of myeloproliferative neoplasms?

 

Dr. Richard: The JAK2 V617F mutation is found in > 90% of patients with polycythemia vera (PV). The remaining patients with PV have mutations in a different portion of the JAK2 gene. Since JAK2 mutations are found in virtually all patients with PV, having the mutation helps make the diagnosis, but does not carry prognostic significance. Some studies suggest that the allele burden of the mutated JAK2 V617F could be used to identify aggressive disease, but that finding is not universally accepted across all health care entities or practitioners. Variations in acceptance may be due to factors such as evolution of knowledge based on the latest evidence, clinical practice variability and priorities, availability of testing, and complexity of disease management.

 

This is not true of the 2 other classical myeloproliferative neoplasms (MPNs) that we see commonly in our clinics: essential thrombocytosis (ET) and myelofibrosis (MF). The CALR mutation can be seen in patients with ET and MF and signals a less aggressive form of the disease.

 

The presence of JAK2 V617F is critical for prognosis. Although it does not directly help to inform the patient of what to expect, identifying the mutation provides us with important information about the patient’s prognosis, which helps guide treatment decisions such as the intensity of therapy and monitoring for thrombotic events.

 

What are the potential implications of the JAK2 V617F mutation in the treatment of PV?

 

Dr. Richard: The discovery of the JAK2 V617F mutation in MPNs in 2005 led to the hope that perhaps there would be targeted therapy that could result in disease remissions. We had all hoped that the spectacular responses observed in patients with chronic myelogenous leukemia (CML) treated with imatinib could be replicated with JAK2 inhibitors. It turned out that blocking JAK2 was insufficient to reverse the disease. Studies are still ongoing whether drugs that can decrease the JAK2 V617F allele burden could be used to achieve a type of remission. Perhaps combination therapies will need to be developed.

 

I am hopeful that in the future we do see advancements that provide improved diagnosis and monitoring to help facilitate early detection, personalized treatment approaches to offer more effective and well tolerated therapies, risk stratification and prognostication to help identify higher risk progression, combination therapies to possibly improve efficacy and adherence, and novel therapeutic targets to help discover new treatments and provide improved outcomes.

 

How can JAK2 V617F lead to 3 different forms of myeloproliferative neoplasms?

 

Dr. Richard: The short answer is no one knows exactly. The phenotypic differences between PV and the other 2 MPN variants are most likely determined by the integration of other signaling pathways that are activated by the corresponding driver mutation, and interactions with other mutations. What also seems to matter is the sequence in which the individual mutations are acquired.

 

There have been documented cases of post-polycythemic leukemia that no longer have the JAK2 V617F mutation. However, at some point that mutation was lost, and the cells acquired other driver mutations that resulted in leukemia.

 

What we do know now is that there are several potential interactions that can coexist with JAK2 V617F. There is MPL mutation, which contributes to disease pathogenesis and thrombotic risk. Independent of JAK2 V617F pathways is CALR mutation, which is another driver of MPNs. In addition are other JAK mutations, epigenetic alterations, and microenvironmental factors. All of these have the potential to influence clinical manifestations by impacting clinical outcomes, affecting expression patterns and signaling inflammation within the bone marrow microenvironment.

 

Are there any ongoing research efforts or clinical trials exploring targeted therapies that specifically address the JAK2 V617F mutation in patients with PV?

 

Dr. Richard: The ongoing research efforts to address JAK2-targeted therapies are looking at options like novel JAK inhibitors, combination therapies, resistance mechanisms, improved safety profiles, biomarker identification, exploring new indications, and preclinical studies that involve the development and testing of new JAK inhibitors.

 

Other JAK2-targeted therapies continue to be in development. At this time, we have ruxolitinib, pacritinib, fedratinib, and momelotinib. None of them appear to be a magic bullet the way imatinib was with CML. Perhaps a better disease comparison is chronic lymphocytic leukemia (CLL). In CLL, targeted therapies against Bruton tyrosine kinase and BCL2 are being combined to result in many years of disease control. JAK2 inhibition may need to be combined with another active drug, perhaps against a mutation or pathway that has not yet been identified.

How does the presence of the JAK2 V617F mutation affect the diagnosis and classification of myeloproliferative neoplasms?

 

Dr. Richard: The JAK2 V617F mutation is found in > 90% of patients with polycythemia vera (PV). The remaining patients with PV have mutations in a different portion of the JAK2 gene. Since JAK2 mutations are found in virtually all patients with PV, having the mutation helps make the diagnosis, but does not carry prognostic significance. Some studies suggest that the allele burden of the mutated JAK2 V617F could be used to identify aggressive disease, but that finding is not universally accepted across all health care entities or practitioners. Variations in acceptance may be due to factors such as evolution of knowledge based on the latest evidence, clinical practice variability and priorities, availability of testing, and complexity of disease management.

 

This is not true of the 2 other classical myeloproliferative neoplasms (MPNs) that we see commonly in our clinics: essential thrombocytosis (ET) and myelofibrosis (MF). The CALR mutation can be seen in patients with ET and MF and signals a less aggressive form of the disease.

 

The presence of JAK2 V617F is critical for prognosis. Although it does not directly help to inform the patient of what to expect, identifying the mutation provides us with important information about the patient’s prognosis, which helps guide treatment decisions such as the intensity of therapy and monitoring for thrombotic events.

 

What are the potential implications of the JAK2 V617F mutation in the treatment of PV?

 

Dr. Richard: The discovery of the JAK2 V617F mutation in MPNs in 2005 led to the hope that perhaps there would be targeted therapy that could result in disease remissions. We had all hoped that the spectacular responses observed in patients with chronic myelogenous leukemia (CML) treated with imatinib could be replicated with JAK2 inhibitors. It turned out that blocking JAK2 was insufficient to reverse the disease. Studies are still ongoing whether drugs that can decrease the JAK2 V617F allele burden could be used to achieve a type of remission. Perhaps combination therapies will need to be developed.

 

I am hopeful that in the future we do see advancements that provide improved diagnosis and monitoring to help facilitate early detection, personalized treatment approaches to offer more effective and well tolerated therapies, risk stratification and prognostication to help identify higher risk progression, combination therapies to possibly improve efficacy and adherence, and novel therapeutic targets to help discover new treatments and provide improved outcomes.

 

How can JAK2 V617F lead to 3 different forms of myeloproliferative neoplasms?

 

Dr. Richard: The short answer is no one knows exactly. The phenotypic differences between PV and the other 2 MPN variants are most likely determined by the integration of other signaling pathways that are activated by the corresponding driver mutation, and interactions with other mutations. What also seems to matter is the sequence in which the individual mutations are acquired.

 

There have been documented cases of post-polycythemic leukemia that no longer have the JAK2 V617F mutation. However, at some point that mutation was lost, and the cells acquired other driver mutations that resulted in leukemia.

 

What we do know now is that there are several potential interactions that can coexist with JAK2 V617F. There is MPL mutation, which contributes to disease pathogenesis and thrombotic risk. Independent of JAK2 V617F pathways is CALR mutation, which is another driver of MPNs. In addition are other JAK mutations, epigenetic alterations, and microenvironmental factors. All of these have the potential to influence clinical manifestations by impacting clinical outcomes, affecting expression patterns and signaling inflammation within the bone marrow microenvironment.

 

Are there any ongoing research efforts or clinical trials exploring targeted therapies that specifically address the JAK2 V617F mutation in patients with PV?

 

Dr. Richard: The ongoing research efforts to address JAK2-targeted therapies are looking at options like novel JAK inhibitors, combination therapies, resistance mechanisms, improved safety profiles, biomarker identification, exploring new indications, and preclinical studies that involve the development and testing of new JAK inhibitors.

 

Other JAK2-targeted therapies continue to be in development. At this time, we have ruxolitinib, pacritinib, fedratinib, and momelotinib. None of them appear to be a magic bullet the way imatinib was with CML. Perhaps a better disease comparison is chronic lymphocytic leukemia (CLL). In CLL, targeted therapies against Bruton tyrosine kinase and BCL2 are being combined to result in many years of disease control. JAK2 inhibition may need to be combined with another active drug, perhaps against a mutation or pathway that has not yet been identified.

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The Future of Polycythemia Vera

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The Future of Polycythemia Vera

Robert E. Richard, MD

There are several new therapies on the horizon for polycythemia vera. What is the potential impact of these treatments coming to market?

Dr. Richard: There are a number of emerging therapies for polycythemia vera (PV), such as PTG-300, idasanutlin, and givinostat. PTG-300, or rusfertide, is a hepcidin mimetic that works by regulating iron metabolism and potentially controlling erythropoiesis, limiting the need for phlebotomy. Idasanutlin, a selective MDM2 inhibitor, targets p53 activity. Even though this drug is early in its development, everyone who treats patients with cancer has been hoping for a drug that works through p53. If it is effective here, who knows where else it could be effective across various other conditions.

Givinostat is well along the development pathway in advanced trials. This drug shows promise in modulating gene expression and reducing the inflammation and fibrosis associated with PV, potentially improving patient outcomes and quality of life. Everyone is hopeful that givinostat could show some effect on disease control and potentially an effect on the myeloproliferative clone. However, rigorous clinical trials and further research are necessary to validate their efficacy, safety profiles, and long-term impacts on patients with PV.

Now, with the approval of peginterferon, the next step is going to be to see how effective it will be and what the adverse events might be. I think we will be getting more data as it starts to be used more. My prediction is that there will be a slow uptake, largely because many older physicians such as myself remember the significant side effects from interferon in the past. Despite being an FDA-approved treatment, it remains an emerging therapy, particularly in the United States. Its adoption and efficacy will become clearer as time progresses.

Another promising drug early in its development is bomedemstat, which functions through a different mechanism as a deacetylase. While the potential effect of histone deacetylase drugs on patient treatment outcomes remains uncertain this year, there might be significant data—either positive or negative—that accelerate the progress of these drugs in their developmental trajectory.

We know that ruxolitinib can be used effectively for patients once they fail hydroxyurea. And now there has been the development of other JAK2 inhibitors that are approved for myelofibrosis. I am not quite sure how they can be evaluated in PV, since we are talking about relatively small numbers of patients, but they do seem to have some slight differences that may be significant and could be used in this space.

Those are the main therapies that I will have my eye on this year.

What is the potential significance of an accelerated dosing schedule for BESREMi (ropeginterferon-alfa-2b-njft), which is being investigated in the ECLIPSE PV phase 3b clinical trial?

Dr. Richard: The potential significance of an accelerated dosing schedule for BESREMi, as investigated in the ECLIPSE PV phase 3b clinical trial, lies in its capacity to enhance treatment efficacy and outcomes for patients with PV. I am incredibly pleased that it is being done as a trial, partly because a lot of people assume that once a phase 3 study is complete and a drug receives FDA approval, everything is finished and done, and we will move on to the next thing. I really appreciate it when phase 3b or 4 studies are performed, and the data get collected and published.

This study is going to follow a group of patients closely for adverse events and for the JAK2 signal. By administering BESREMi at an accelerated pace, researchers can evaluate its ability to better control hematocrit levels and symptoms associated with PV. In addition, an accelerated dosing schedule could potentially offer patients more efficient symptom management and disease control, leading to improved quality of life and reduced complications associated with PV. I believe that findings from this trial could thus pave the way for optimized treatment strategies and better outcomes for individuals living with PV.

What should future trials focus on to help improve prognosis and survival for patients with PV?

Dr. Richard: We are starting to move increasingly into finding better therapies for patients with PV, and I’ll add in essential thrombocytosis, which are based on informed prognostication. I would love to see studies that just pull out the patients at the highest risk, where the survival is down around 5 years—those are small numbers of patients. To conduct a study like that is exceedingly difficult to do. We are seeing increased consortiums of myeloproliferative neoplasm physicians. Europe has always been particularly good at this. The United States is getting better at it, so it is possible that a trial like that could be pulled together, where centers put in 1 or 2 patients at a time.

Future trials aimed at improving prognosis and survival for PV should prioritize several critical areas. First, there is a need for comprehensive studies to better understand the molecular mechanisms underlying PV pathogenesis, including the JAK2 mutation and its downstream effects. Exploring new therapeutic implications and improve long-term outcomes. Additionally, identifying reliable biomarkers for disease progression and treatment response can facilitate early intervention and personalized treatment approaches. Finally, trials should focus on assessing the impact of treatment on quality of life and addressing the unique needs of patients with PV to optimize overall prognosis and survival.

I have always held hope that the Veterans Administration could serve as a platform for conducting some of these studies, given that we possess the largest healthcare system in the country. Whether we participate in larger studies or conduct our research internally, this is something I have long envisioned.


 
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Robert E. Richard, MD, Associate Professor, Department of Medicine, Division of Hematology-Oncology, University of Washingon School of Medicine; Chief of Hematology, VA Puget Sound, Seattle, Washington
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Robert E. Richard, MD, has disclosed no relevant financial relationships.

Robert E. Richard, MD

There are several new therapies on the horizon for polycythemia vera. What is the potential impact of these treatments coming to market?

Dr. Richard: There are a number of emerging therapies for polycythemia vera (PV), such as PTG-300, idasanutlin, and givinostat. PTG-300, or rusfertide, is a hepcidin mimetic that works by regulating iron metabolism and potentially controlling erythropoiesis, limiting the need for phlebotomy. Idasanutlin, a selective MDM2 inhibitor, targets p53 activity. Even though this drug is early in its development, everyone who treats patients with cancer has been hoping for a drug that works through p53. If it is effective here, who knows where else it could be effective across various other conditions.

Givinostat is well along the development pathway in advanced trials. This drug shows promise in modulating gene expression and reducing the inflammation and fibrosis associated with PV, potentially improving patient outcomes and quality of life. Everyone is hopeful that givinostat could show some effect on disease control and potentially an effect on the myeloproliferative clone. However, rigorous clinical trials and further research are necessary to validate their efficacy, safety profiles, and long-term impacts on patients with PV.

Now, with the approval of peginterferon, the next step is going to be to see how effective it will be and what the adverse events might be. I think we will be getting more data as it starts to be used more. My prediction is that there will be a slow uptake, largely because many older physicians such as myself remember the significant side effects from interferon in the past. Despite being an FDA-approved treatment, it remains an emerging therapy, particularly in the United States. Its adoption and efficacy will become clearer as time progresses.

Another promising drug early in its development is bomedemstat, which functions through a different mechanism as a deacetylase. While the potential effect of histone deacetylase drugs on patient treatment outcomes remains uncertain this year, there might be significant data—either positive or negative—that accelerate the progress of these drugs in their developmental trajectory.

We know that ruxolitinib can be used effectively for patients once they fail hydroxyurea. And now there has been the development of other JAK2 inhibitors that are approved for myelofibrosis. I am not quite sure how they can be evaluated in PV, since we are talking about relatively small numbers of patients, but they do seem to have some slight differences that may be significant and could be used in this space.

Those are the main therapies that I will have my eye on this year.

What is the potential significance of an accelerated dosing schedule for BESREMi (ropeginterferon-alfa-2b-njft), which is being investigated in the ECLIPSE PV phase 3b clinical trial?

Dr. Richard: The potential significance of an accelerated dosing schedule for BESREMi, as investigated in the ECLIPSE PV phase 3b clinical trial, lies in its capacity to enhance treatment efficacy and outcomes for patients with PV. I am incredibly pleased that it is being done as a trial, partly because a lot of people assume that once a phase 3 study is complete and a drug receives FDA approval, everything is finished and done, and we will move on to the next thing. I really appreciate it when phase 3b or 4 studies are performed, and the data get collected and published.

This study is going to follow a group of patients closely for adverse events and for the JAK2 signal. By administering BESREMi at an accelerated pace, researchers can evaluate its ability to better control hematocrit levels and symptoms associated with PV. In addition, an accelerated dosing schedule could potentially offer patients more efficient symptom management and disease control, leading to improved quality of life and reduced complications associated with PV. I believe that findings from this trial could thus pave the way for optimized treatment strategies and better outcomes for individuals living with PV.

What should future trials focus on to help improve prognosis and survival for patients with PV?

Dr. Richard: We are starting to move increasingly into finding better therapies for patients with PV, and I’ll add in essential thrombocytosis, which are based on informed prognostication. I would love to see studies that just pull out the patients at the highest risk, where the survival is down around 5 years—those are small numbers of patients. To conduct a study like that is exceedingly difficult to do. We are seeing increased consortiums of myeloproliferative neoplasm physicians. Europe has always been particularly good at this. The United States is getting better at it, so it is possible that a trial like that could be pulled together, where centers put in 1 or 2 patients at a time.

Future trials aimed at improving prognosis and survival for PV should prioritize several critical areas. First, there is a need for comprehensive studies to better understand the molecular mechanisms underlying PV pathogenesis, including the JAK2 mutation and its downstream effects. Exploring new therapeutic implications and improve long-term outcomes. Additionally, identifying reliable biomarkers for disease progression and treatment response can facilitate early intervention and personalized treatment approaches. Finally, trials should focus on assessing the impact of treatment on quality of life and addressing the unique needs of patients with PV to optimize overall prognosis and survival.

I have always held hope that the Veterans Administration could serve as a platform for conducting some of these studies, given that we possess the largest healthcare system in the country. Whether we participate in larger studies or conduct our research internally, this is something I have long envisioned.


 

Robert E. Richard, MD

There are several new therapies on the horizon for polycythemia vera. What is the potential impact of these treatments coming to market?

Dr. Richard: There are a number of emerging therapies for polycythemia vera (PV), such as PTG-300, idasanutlin, and givinostat. PTG-300, or rusfertide, is a hepcidin mimetic that works by regulating iron metabolism and potentially controlling erythropoiesis, limiting the need for phlebotomy. Idasanutlin, a selective MDM2 inhibitor, targets p53 activity. Even though this drug is early in its development, everyone who treats patients with cancer has been hoping for a drug that works through p53. If it is effective here, who knows where else it could be effective across various other conditions.

Givinostat is well along the development pathway in advanced trials. This drug shows promise in modulating gene expression and reducing the inflammation and fibrosis associated with PV, potentially improving patient outcomes and quality of life. Everyone is hopeful that givinostat could show some effect on disease control and potentially an effect on the myeloproliferative clone. However, rigorous clinical trials and further research are necessary to validate their efficacy, safety profiles, and long-term impacts on patients with PV.

Now, with the approval of peginterferon, the next step is going to be to see how effective it will be and what the adverse events might be. I think we will be getting more data as it starts to be used more. My prediction is that there will be a slow uptake, largely because many older physicians such as myself remember the significant side effects from interferon in the past. Despite being an FDA-approved treatment, it remains an emerging therapy, particularly in the United States. Its adoption and efficacy will become clearer as time progresses.

Another promising drug early in its development is bomedemstat, which functions through a different mechanism as a deacetylase. While the potential effect of histone deacetylase drugs on patient treatment outcomes remains uncertain this year, there might be significant data—either positive or negative—that accelerate the progress of these drugs in their developmental trajectory.

We know that ruxolitinib can be used effectively for patients once they fail hydroxyurea. And now there has been the development of other JAK2 inhibitors that are approved for myelofibrosis. I am not quite sure how they can be evaluated in PV, since we are talking about relatively small numbers of patients, but they do seem to have some slight differences that may be significant and could be used in this space.

Those are the main therapies that I will have my eye on this year.

What is the potential significance of an accelerated dosing schedule for BESREMi (ropeginterferon-alfa-2b-njft), which is being investigated in the ECLIPSE PV phase 3b clinical trial?

Dr. Richard: The potential significance of an accelerated dosing schedule for BESREMi, as investigated in the ECLIPSE PV phase 3b clinical trial, lies in its capacity to enhance treatment efficacy and outcomes for patients with PV. I am incredibly pleased that it is being done as a trial, partly because a lot of people assume that once a phase 3 study is complete and a drug receives FDA approval, everything is finished and done, and we will move on to the next thing. I really appreciate it when phase 3b or 4 studies are performed, and the data get collected and published.

This study is going to follow a group of patients closely for adverse events and for the JAK2 signal. By administering BESREMi at an accelerated pace, researchers can evaluate its ability to better control hematocrit levels and symptoms associated with PV. In addition, an accelerated dosing schedule could potentially offer patients more efficient symptom management and disease control, leading to improved quality of life and reduced complications associated with PV. I believe that findings from this trial could thus pave the way for optimized treatment strategies and better outcomes for individuals living with PV.

What should future trials focus on to help improve prognosis and survival for patients with PV?

Dr. Richard: We are starting to move increasingly into finding better therapies for patients with PV, and I’ll add in essential thrombocytosis, which are based on informed prognostication. I would love to see studies that just pull out the patients at the highest risk, where the survival is down around 5 years—those are small numbers of patients. To conduct a study like that is exceedingly difficult to do. We are seeing increased consortiums of myeloproliferative neoplasm physicians. Europe has always been particularly good at this. The United States is getting better at it, so it is possible that a trial like that could be pulled together, where centers put in 1 or 2 patients at a time.

Future trials aimed at improving prognosis and survival for PV should prioritize several critical areas. First, there is a need for comprehensive studies to better understand the molecular mechanisms underlying PV pathogenesis, including the JAK2 mutation and its downstream effects. Exploring new therapeutic implications and improve long-term outcomes. Additionally, identifying reliable biomarkers for disease progression and treatment response can facilitate early intervention and personalized treatment approaches. Finally, trials should focus on assessing the impact of treatment on quality of life and addressing the unique needs of patients with PV to optimize overall prognosis and survival.

I have always held hope that the Veterans Administration could serve as a platform for conducting some of these studies, given that we possess the largest healthcare system in the country. Whether we participate in larger studies or conduct our research internally, this is something I have long envisioned.


 
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