Scientists from the University of York are working with doctors and patients at York Hospital to understand the DNA mutations linked to a group of chronic blood cancers, and investigate why, in some cases, they can suddenly become more aggressive.
The researchers, from the newly formed Centre for Blood Research at the University of York, are recruiting participants from York Hospital with myeloproliferative neoplasms (MPNs), a group of blood cancers characterised by the overproduction of red blood cells and/or platelets.
There are around 4,000 cases of MPNs in the UK each year and they most commonly affect people over 60. Often, they remain stable and progress slowly, which means people can live with them for a long time without being very unwell.
However, in a few rare cases, they can transform into more aggressive cancers which need urgent treatment, such as acute myeloid leukaemia (AML), where faulty myeloid cells – which include red blood cells and platelets – build up in the body and stop the blood and immune system from functioning normally.
Valuable insights
Dr Katherine Bridge, from the Department of Biology and Centre for Blood Research at the University of York, said: “We want to better understand the DNA mutations that cause these cancers, and to see whether there are additional factors that cause them to suddenly transform and become more aggressive.
“MPNs behave like the early stages of other blood cancers, offering valuable insights into their progression. Often, these crucial initial stages occur too quickly in other cancers for us to be able to track them effectively. By focusing on MPNs, we have a unique opportunity to scrutinise these early events, potentially uncovering strategies to halt the advancement of more aggressive malignancies.”
For patients with blood cancers, follow-up care consisting of management of psychosocial consequences, promotion of a healthy lifestyle, and disease prevention may be better addressed by primary care physicians (PCPs) than oncologists, according to a study published in Cancer Medicine.
The study, conducted in Germany, found most survivors of blood cancers were receiving care at a university hospital and a minority were actually being care for by community oncologists or PCPs. The researchers evaluated follow-up care received by survivors from the University Hospital of Essen using a questionnaire.
“Given the favorable prognosis of many types of blood cancer, there is a wealth of information about long-term treatment side effects, secondary diseases, and quality of life. How and by whom follow-up care is delivered, however, remains largely unexplored,” the authors noted.
Follow-up can be provided in different ways. In one model, oncologists provide follow-up care related to cancer and general practitioners provide other health care at the same time. In another model, survivors of cancer are transferred to PCPs for continued care. In a more complex model, oncologists and general practitioners have complementary roles.
The Janus kinase 2 (JAK2) protein mediates signaling from several cytokine receptors in the regulation of hematopoiesis and immune responses. Somatic mutations in human JAK2 lead to constitutive activation and cytokine-independent signaling and underlie several hematological malignancies from myeloproliferative neoplasms (MPN) to acute leukemia and lymphomas. JAK2 contains an active kinase domain and an inactive pseudokinase domain. Interestingly, pathogenic mutations mainly occur in the regulatory pseudokinase domain.
Due to its critical pathogenic role, JAK2 has become an important therapeutic target. The four currently approved JAK2 inhibitors relieve symptoms but do not heal the patient or affect survival. These drugs target the highly conserved kinase domain and affect both normal and mutated JAK2 and, due to side effects, carry a black box warning that limits their use in elderly, cardiac and cancer patients. The selective inhibition of pathogenic JAK2 is a key pending goal in drug discovery that requires a precise mechanistic understanding of the regulation of JAK2 activation.
“To understand the molecular and structural basis of the physiological and pathogenic activation of JAK2, we used single-molecule microscopy and erythropoietin receptor (EpoR) as a model system.
Professor George Vassiliou from the Wellcome-MRC Cambridge Stem Cell Institute (CSCI), University of Cambridge will spearhead the project, which focuses on myeloid blood cancers, a group of blood cancers that accounts for more than 11,000 deaths each year in the UK.
The blood cancers, which affect both the bone marrow and blood, include acute myeloid leukaemia (AML), myelodysplastic syndromes (MDS), myeloproliferative neoplasms (MPN) and rarer cancers like chronic myelomonocytic leukaemia (CMML).
This article explores the rare case of an 82-year-old man diagnosed concurrently with essential thrombocythemia and smoldering multiple myeloma (SMM). The limited existing literature on individuals harboring both myeloproliferative neoplasm (MPN) and monoclonal gammopathy (MG) is of significant interest due to the distinct origins of these malignancies. The etiology of MG in MPN patients remains elusive, leading to speculation about a potential relationship or interplay between the two conditions. This unique case prompts a deeper exploration of the mechanisms underlying the coexistence of JAK2-positive MPN and SMM. It underscores the importance of tailored therapeutic strategies that carefully consider the inherent risks and potential adverse outcomes associated with these specific malignancies, thereby warranting further clinical research.
Introduction
While existing literature acknowledges the coexistence of dual malignancies within the same patient [1], there is relatively limited documentation regarding the simultaneous occurrence of dual hematological malignancies (DHMs) [2,3], encompassing both myeloid and lymphoid hemopathies. A noteworthy aspect is the distinctive origin of these two malignancies from separate lineages within the hematopoietic ancestral tree [4]. DHMs can be classified as synchronous, manifesting within six months of the initial malignancy diagnosis, or asynchronous if they arise later [5].
Since its inclusion in the classification of monoclonal gammopathy (MG), smoldering multiple myeloma (SMM) has emerged as a significant aspect of MG [6], attracting attention in various clinical investigations.
Currently, no established strategies exist for treating or monitoring patients with myeloproliferative neoplasms (MPNs) and concurrent SMM. Additionally, the precise source of SMM in patients with MPN is not well understood, and there is uncertainty regarding whether an aberrant plasma cell condition arises from the identical hematopoietic clone as the MPN.
Numerous case reports have highlighted the occurrence of monoclonal gammopathy of undetermined significance (MGUS) or multiple myeloma (MM) in patients with MPN, with details from only a limited number of patient cohorts published [7]. Remarkably, to date, there have been no reported instances of the concurrent diagnosis of essential thrombocythemia (ET) and SMM. In this report, we present a case of synchronous concurrent SMM and ET and provide a comprehensive review of the existing literature.
Case Presentation
An 82-year-old man with a history of hypertension and diabetes was referred to our department for the management of thrombocytosis. Physical examination revealed no remarkable findings, and there was no evidence of lymphadenopathy or hepatosplenomegaly. Laboratory results indicated a platelet count of 946 g/L, hemoglobin of 12.5 g/dL, and a white blood cell count of 6.4 g/L. The patient had no systemic symptoms.
Thrombocytosis workup was initiated, initially excluding infections and iron deficiency. The platelet count was notably elevated, suggesting uncommonly high levels for secondary causes of thrombocytosis.
The patient’s chemistry panel results are shown in Table 1. Monoclonal protein was measured at 36.6 g/L. Serum immunofixation electrophoresis revealed IgG lambda gammopathy. Free light chain lambda was elevated, and kappa was normal.
Nicole D. Vincelette, PhD, postdoctoral fellow, Moffitt Cancer Center, discusses findings from a study investigating the role of MYC expression and S100A9-mediated inflammation in a subgroup of triple-negative myeloproliferative neoplasms (MPNs).
To determine how MYC expression drives MPNs, such as polycythemia vera, essential thrombocythemia, and primary myelofibrosis, Vincelette and colleagues conducted a study in which they generated a mouse model that overexpresses MYC in the stem cell compartment. This analysis demonstrated that MYC overexpression was associated with the mice developing a myelofibrosis-like phenotype, which included anemia, atypical megakaryocytes, splenomegaly, bone marrow fibrosis, liver fibrosis, spleen fibrosis. The mice also experienced adverse clinical outcomes, such as reduced overall survival (OS), compared with wild-type mice, Vincelette says.
Since the MYC-overexpressed mice developed myelofibrosis, the next step of this research was to investigate how MYC drives myelofibrosis, Vincelette explains. Investigators performed single-cell RNA sequencing to compare the bone marrow cells from MYC-overexpressed and wild-type mice. MYC overexpression correlated with upregulation of the S100A9 protein, which contributes to inflammation and innate immunity, according to Vincelette. Therefore, MYC drives the development of myelofibrosis through S100A9-mediated chronic inflammation. To validate the role of S100A9 downstream of MYC in myelofibrosis, investigators created a mouse model with S100A9 knockout in the presence of MYC overexpression, Vincelette notes. The S100A9 knockout protected against the development of myelofibrosis phenotype in that mouse model, Vincelette emphasizes.
By generating a mouse model that overexpresses S100A9, investigators also determined that S100A9 overexpression alone contributes to the development of myelofibrosis phenotypes, Vincelette says. When investigators treated the MYC-overexpressing mice with the S100A9 inhibitor tasquinimod (ABR-215050), the agent only partially abrogated the myelofibrosis phenotype, meaning the mice had reduced atypical megakaryocytes and splenomegaly. Additionally, the mice developed anemia and no OS difference occurred between tasquinimod and vehicle treatment, potentially because of off-target drug effects, Vincelette concludes.
Researchers from the University of Cambridge, Wellcome Sanger Institute, and collaborators have shown how inherited genetic variants can influence the risk of developing a rare blood cancer.
Large-scale genetic analysis has helped researchers uncover the relationship between cancer-driving genetic mutations and inherited genetic variants in a rare type of blood cancer.
The team combined datasets to understand the impact of cancer-driving spontaneous mutations and inherited genetic variation on the risk of developing myeloproliferative neoplasms (MPN).
Published in Nature Genetics, the study describes how inherited genetic variants can influence whether a spontaneous mutation in a particular gene increases the risk of developing this rare blood cancer.
The analysis will have an impact on current clinical predictions of disease development in individuals.
More research is needed to understand the mechanisms behind how the inherited genetic variants influence the probability of developing rare blood cancer.
In the future, the work could aid drug development interventions that reduce the risk of disease.
Myeloproliferative neoplasms
MPNs are a group of rare and chronic blood cancers, with around 4,000 cases in the UK each year. These occur when the bone marrow overproduces blood cells, resulting in blood clots and bleeding.
MPNs can also progress into other forms of blood cancer.
Genetic risk score
There is a large amount of natural variation between individuals’ blood cells which can affect the amount of blood cells a person has and their traits. This is because different genes can influence blood cell features in an individual.
Researchers take known information about these genes during routine blood tests and analyse the variation to give a genetic risk score. This is how likely that individual is to develop a disease over their lifetime.
MPNs have been linked to random somatic mutations in a gene called JAK2; however, mutated JAK2 is commonly found in the global population. The vast majority of these individuals do not have or go on to develop MPN.
Previous studies identified over a dozen associated inherited genetic variants that increase the risk of MPN. However, these studies do not explain why most individuals do not go on to develop MPN.
Inherited genetic variants can influence risk
The new study combined information on the known somatic driver mutations in MPN inherited genetic variants, and genetic risk scores from individuals with MPN.
They found that the inherited genetic variants that cause natural blood cell variation in the population also impact whether a JAK2 somatic mutation will cause MPN. The team also discovered that individuals with an inherited risk of having a higher blood cell count could display MPN features in the absence of cancer-driving mutations, mimicking disease.
Dr Jing Guo, from the University of Cambridge and the Wellcome Sanger Institute and first author of the study, said: “Our large-scale statistical study has helped fill the knowledge gaps in how variants in DNA, both inherited and somatic, interact to influence complex disease risk.
“By combining these three different types of datasets we were able to get a more complete picture of how these variants combine to cause blood disorders.”
My daughter came to Ohio to provide support to me and my wife during my recent stem cell transplant (SCT). In explaining the process to her I used the analogy of parachuting from a crippled airplane and she found it very helpful. I hope that this analogy might also help others understand my experience. Like with parachuting, there are risks there are steps to take. Each step is a small victory, but the ultimate victory is landing safely.
When I was diagnosed with Primary Myelofibrosis in 2013, it became clear that my high-flying airplane (my body) had a problem. It was still possible that it could fly on for years with relatively few problems, but we needed to keep an eye on it. Medications like Jakafi and Inrebic made the flight a bit more pleasant, but blood counts and bone marrow biopsies indicated that we were losing altitude.
This December I realized through consultation with Dr. Aaron Gerds from the Cleveland Clinic that the plane’s problems were becoming unmanageable. I was now High Risk and I was headed for a fatal crash sooner rather than later. It was difficult to say just how long it would take – but our calculator (MIPPS70) predicted about 5 years – give or take.
At that point I needed to decide whether I would take the risks involved in jumping out of the plane or choose to die in the crash. In consultation with my dear wife and my medical team and with the prayers of my friends and family we considered my options. I decided to make the jump.
Some people cannot find a good donor match – or they have physical problems that would make SCT pointless. But in my case, everything appeared promising. The team at the Cleveland Clinic put me through tests that showed I was relatively fit. They found multiple 10/10 unrelated donor matches for me. We received necessary insurance approvals. We received logistical support from our family, church family and friends for help throughout the process.
Finally everything was in place. I was giving up on the old airplane that was certainly failing and entrusting myself to the parachute for a safe descent and landing.
I got my final approval to go ahead (negative COVID test. 2/16)
I got the notification that the parachute was in hand (the donor cells had been collected and received by Cleveland Clinic. 2/17)
I prepared myself with the equipment make the jump (my Hickman port was installed through my chest up to my heart. 2/18)
I jumped out the door of the plane (I received chemotherapy to kill my defective bone marrow. from 2/19-2/22)
I put on my parachute and pulled the ripcord (The donor cells were infused into my body. Day Zero – 2/24.
The free fall is not very much fun. The chemo continued to kill off my bone marrow and other fast-growing cells and I didn’t feel well. I had some nausea. I felt very tired. My mouth got sore to the point that I could barely swallow and needed to get most meds through my port. Eventually I needed transfusions of whole blood almost every day and platelets every other day.
And there is always the nagging question of whether or not that parachute would actually open! I was very happy when my fall turned around on day +14. That day my WBC finally went up from 0.050 to 0.090. And it continued to gradually climb so that by day +19 I was able to leave the hospital. At that point I had not needed a transfusion in three days, and they canceled my first outpatient transfusion day.
I am now at day +69 and I have not needed any transfusions for 7 weeks! I feel well. I’m able to exercise. I’m down to one Cleveland Clinic visit each week. Every week they tweak my meds – add one, change the dose of another. We keep watch for any sign of infection or of Graft versus Host Disease. (I’m happy to report there’s nothing much to report so far.)
I am doing well and I am very grateful. I am grateful to God who is the source of my life and my salvation. I am grateful to my beloved friends and family for their prayers and their constant encouragement. I am grateful to the all the people at Cleveland Clinic for their expertise and good care for me. And I am very grateful to the donor who provided me with my parachute – I don’t know him but I do know that he is 25 years old, lives somewhere in the USA and goes out of his way to help strangers!
Are use of aspirin, heparin, interferon, or combinations associated with live birth rate and adverse maternal outcomes in pregnant women with myeloproliferative neoplasms?
Findings
In this systematic review and meta-analysis of 22 studies, reporting on 1210 pregnancies, the live birth rate was 71.3%; most studies reported on pregnancy with essential thrombocythemia. The use of aspirin and interferon—but not heparin—was associated with higher odds of live birth.
Meaning
Moderate-quality evidence suggests that treatment with aspirin or interferon is associated with higher odds of live birth in pregnant patients with myeloproliferative neoplasms.
Myeloproliferative neoplasms (MPNs) are increasingly being identified in women of childbearing potential. Pregnancy in women with MPNs is associated with maternal thrombosis, hemorrhage, and placental dysfunction leading to fetal growth restriction or loss.
Objective
To evaluate the association between the use of aspirin, heparin, interferon, or combinations and live birth rate and adverse maternal outcomes in pregnant women with MPNs.
Data Sources
Systematic searches of MEDLINE, Embase, Cochrane Database of Systematic Reviews, Cochrane Central Register of Controlled Trials, and the MEDLINE Epub Ahead of Print and In-Process and Other Non-Indexed Citations from inception to July 19, 2018, with no language restrictions, was conducted. Key search terms included myeloproliferative disorders, polycythemia vera, essential thrombocythemia, and primary myelofibrosis.
Study Selection
A study was eligible if it included pregnant patients with MPNs; interventions included aspirin, heparin, and/or interferon; there was a comparison group in which patients did not receive the intervention; the study reported on at least 1 of the study outcomes; and it was a randomized, case-control, or cohort study or series of at least 10 pregnancies. Data were extracted in duplicate; 0.5% of identified studies met selection criteria.
Data Extraction and Synthesis
The review was conducted according to Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guidelines and reported in accordance with Meta-analysis of Observational Studies in Epidemiology (MOOSE) guidelines. Data were pooled using the Mantel-Haenszel approach.
Main Outcomes and Measures
Outcomes were the number of live births and maternal complications, specifically, arterial or venous thrombosis, hemorrhage, and preeclampsia.
Results
Twenty-two studies reporting on 1210 pregnancies were included. The live birth rate was 71.3% (95% CI, 65.1%-77.6%). Use of aspirin (11 studies, 227 patients; unadjusted odds ratio, 8.6; 95% CI, 4.0-18.1) and interferon (6 studies, 90 patients; unadjusted odds ratio, 9.7; 95% CI, 2.3-41.0) were associated with higher odds of live birth. Addition of heparin to aspirin was not associated with higher odds of live birth (6 studies, 96 patients; unadjusted odds ratio, 2.1; 95% CI, 0.5-9.0). The most common adverse maternal event was preeclampsia, with an incidence of 3.1% (95% CI, 1.7%-4.5%).
Conclusions and Relevance
Most studies reported on pregnancy with essential thrombocythemia. Few studies reported on pregnancy with polycythemia vera and none with myelofibrosis met the inclusion criteria. Most studies were retrospective and early pregnancy losses may have been underreported. Moderate-quality evidence suggests that aspirin or interferon is associated with higher odds of live birth in pregnant women with MPN.
Diagnosed at age seven with Essential Thrombocythemia, Portia shared her story at the 2nd Annual Pediatric & Young Adult MPN Patient Program.
Portia, a young adult MPN patient, shared her story at the 2nd annual Pediatric & Young Adult Program
Do you remember experiencing any symptoms?
I had occasional nosebleeds that would last about twenty minutes or so. But over time, the time decreased to about ten minutes. I also experience fatigue, especially when I’m sick, all I do is sleep to try and regain any energy. Also, I’m very active and I play competitive squash, so I do experience fatigue more than an average person.
How do you cope with essential thrombocythemia (ET) symptoms and/or side effects from Hydroxyurea?
I’m very lucky that I don’t really experience too many symptoms, but I usually push through any pain that I have since I’m such a wimp about medication. I have not had any side effects from Hydroxyurea. For fatigue, I don’t take any other medication, I pretty much just work hard and try to be smart about how I utilize my energy. When playing squash, I work extra hard to make up for my fatigue, but if I really can’t breathe due to lack of oxygen, I will talk to my coach and ask for a small break to recuperate. Most coaches are very reasonable and will allow a break.
Has ET curtailed your involvement in school activities? Sports?
When I was younger, elementary and middle school age, I would occasionally have to miss school for lab appointments, so I would have to make up work. One symptom of ET is fatigue, so I do have to deal with that in sports. But I also have Hemoglobin H, which I believe has a bigger impact on my fatigue in sports than ET. But overall, I still go about my life and continue to do the things I love.
How do you explain what you have to your friends?
As I’ve gotten older, I’ve done a lot more of my own research to further understand my condition, but to my friends, I explain that I have way too many platelets, which help clot your blood when you get a cut, and because of that, I bleed for longer.
What advice would you give other younger individuals with an MPN when peers say they don’t look sick or they’re faking?
I would tell them to do their best to ignore their hateful comments and try to explain their condition by telling them it’s something internal rather than external, that’s why they don’t appear sick. And most important, find friends who won’t judge you, and people who do, clearly aren’t your real friends, for real friends should accept you no matter what.
You are very energetic and positive, when you reach out to others your age who aren’t feeling well, what do you say to encourage them?
First, I would listen to their concerns and possible issues, and then I would tell them to keep their head held high and know that it does get better. This is just a phase and eventually, the negative parts will fade away. Also, it’s very important to know who your close friends are and be able to talk to them since many kids would rather talk to their friends rather than a parent or even a doctor since it can be intimidating. I would also say, take one day at a time and find joy in the little things, whether it’s going for ice cream or just taking a nice walk.
If you could wave a wand and change one thing in the world of MPNs, what would you change?
Personally, I would change the medicine. I really hate swallowing pills, so I would much prefer something fun to eat or drink as my medicine. I’m also very strange and would much rather have the medicine get injected into me, which I know is an option, but the majority of people aren’t a big fan of needles.
By Dave D.