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Puli'uvea C, Immanuel T, Green TN, Tsai P, Shepherd PR, Kalev-Zylinska ML. Insights into the role of JAK2-I724T variant in myeloproliferative neoplasms from a unique cohort of New Zealand patients. Hematology 2024; 29:2297597. [PMID: 38197452 DOI: 10.1080/16078454.2023.2297597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Accepted: 12/12/2023] [Indexed: 01/11/2024] Open
Abstract
OBJECTIVES This study aimed to compile bioinformatic and experimental information for JAK2 missense variants previously reported in myeloproliferative neoplasms (MPN) and determine if germline JAK2-I724T, recently found to be common in New Zealand Polynesians, associates with MPN. METHODS For all JAK2 variants found in the literature, gnomAD_exome allele frequencies were extracted and REVEL scores were calculated using the dbNSFP database. We investigated the prevalence of JAK2-I724T in a cohort of 111 New Zealand MPN patients using a TaqMan assay, examined its allelic co-occurrence with JAK2-V617F using Oxford Nanopore sequencing, and modelled the impact of I724T on JAK2 using I-Mutant and ChimeraX software. RESULTS Several non-V617F JAK2 variants previously reported in MPN had REVEL scores greater than 0.5, suggesting pathogenicity. JAK2-I724T (REVEL score 0.753) was more common in New Zealand Polynesian MPN patients (n = 2/27; 7.4%) than in other New Zealand patients (n = 0/84; 0%) but less common than expected for healthy Polynesians (n = 56/377; 14.9%). Patients carrying I724T (n = 2), one with polycythaemia vera and one with essential thrombocythaemia, had high-risk MPN. Both patients with JAK2-I724T were also positive for JAK2-V617F, found on the same allele as I724T, as well as separately. In silico modelling did not identify noticeable structural changes that would give JAK2-I724T a gain-of-function. CONCLUSION Several non-canonical JAK2 variants with high REVEL scores have been reported in MPN, highlighting the need to further understand their relationship with disease. The JAK2-I724T variant does not drive MPN, but additional investigations are required to exclude any potential modulatory effect on the MPN phenotype.
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Affiliation(s)
- Christopher Puli'uvea
- Department of Molecular Medicine and Pathology, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, Hosted by the University of Auckland, Auckland, New Zealand
| | - Tracey Immanuel
- Department of Molecular Medicine and Pathology, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Taryn N Green
- Department of Molecular Medicine and Pathology, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Peter Tsai
- Department of Molecular Medicine and Pathology, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, Hosted by the University of Auckland, Auckland, New Zealand
| | - Peter R Shepherd
- Department of Molecular Medicine and Pathology, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, Hosted by the University of Auckland, Auckland, New Zealand
| | - Maggie L Kalev-Zylinska
- Department of Molecular Medicine and Pathology, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
- Department of Pathology and Laboratory Medicine, Auckland City Hospital, Auckland, New Zealand
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Gurban P, Mambet C, Botezatu A, Necula LG, Neagu AI, Matei L, Pitica IM, Nedeianu S, Chivu-Economescu M, Bleotu C, Ataman M, Mocanu G, Saguna C, Pavel AG, Stambouli D, Sepulchre E, Anton G, Diaconu CC, Constantinescu SN. Leukemic conversion involving RAS mutations of type 1 CALR-mutated primary myelofibrosis in a patient treated for HCV cirrhosis: a case report. Front Oncol 2023; 13:1266996. [PMID: 37841434 PMCID: PMC10570518 DOI: 10.3389/fonc.2023.1266996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 09/04/2023] [Indexed: 10/17/2023] Open
Abstract
Somatic frameshift mutations in exon 9 of calreticulin (CALR) gene are recognized as disease drivers in primary myelofibrosis (PMF), one of the three classical Philadelphia-negative myeloproliferative neoplasms (MPNs). Type 1/type 1-like CALR mutations particularly confer a favorable prognostic and survival advantage in PMF patients. We report an unusual case of PMF incidentally diagnosed in a 68-year-old woman known with hepatitis C virus (HCV) cirrhosis who developed a progressive painful splenomegaly, without anomalies in blood cell counts. While harboring a type 1 CALR mutation, the patient underwent a leukemic transformation in less than 1 year from diagnosis, with a lethal outcome. Analysis of paired DNA samples from chronic and leukemic phases by a targeted next-generation sequencing (NGS) panel and single-nucleotide polymorphism (SNP) microarray revealed that the leukemic clone developed from the CALR-mutated clone through the acquisition of genetic events in the RAS signaling pathway: an increased variant allele frequency of the germline NRAS Y64D mutation present in the chronic phase (via an acquired uniparental disomy of chromosome 1) and gaining NRAS G12D in the blast phase. SNP microarray analysis showed five clinically significant copy number losses at regions 7q22.1, 8q11.1-q11.21, 10p12.1-p11.22, 11p14.1-p11.2, and Xp11.4, revealing a complex karyotype already in the chronic phase. We discuss how additional mutations, detected by NGS, as well as HCV infection and antiviral therapy, might have negatively impacted this type 1 CALR-mutated PMF. We suggest that larger studies are required to determine if more careful monitoring would be needed in MPN patients also carrying HCV and receiving anti-HCV treatment.
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Affiliation(s)
- Petruta Gurban
- Cellular and Molecular Pathology Department, Stefan S. Nicolau Institute of Virology, Romanian Academy, Bucharest, Romania
- Cytogenomic Medical Laboratory Ltd., Bucharest, Romania
| | - Cristina Mambet
- Cellular and Molecular Pathology Department, Stefan S. Nicolau Institute of Virology, Romanian Academy, Bucharest, Romania
- Department of Radiology, Oncology, and Hematology, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
- Hematology Department, Emergency University Clinical Hospital, Bucharest, Romania
| | - Anca Botezatu
- Molecular Virology Department, Stefan S. Nicolau Institute of Virology, Romanian Academy, Bucharest, Romania
| | - Laura G. Necula
- Cellular and Molecular Pathology Department, Stefan S. Nicolau Institute of Virology, Romanian Academy, Bucharest, Romania
| | - Ana I. Neagu
- Cellular and Molecular Pathology Department, Stefan S. Nicolau Institute of Virology, Romanian Academy, Bucharest, Romania
- Department of Radiology, Oncology, and Hematology, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
| | - Lilia Matei
- Cellular and Molecular Pathology Department, Stefan S. Nicolau Institute of Virology, Romanian Academy, Bucharest, Romania
| | - Ioana M. Pitica
- Cellular and Molecular Pathology Department, Stefan S. Nicolau Institute of Virology, Romanian Academy, Bucharest, Romania
| | - Saviana Nedeianu
- Cellular and Molecular Pathology Department, Stefan S. Nicolau Institute of Virology, Romanian Academy, Bucharest, Romania
| | - Mihaela Chivu-Economescu
- Cellular and Molecular Pathology Department, Stefan S. Nicolau Institute of Virology, Romanian Academy, Bucharest, Romania
| | - Coralia Bleotu
- Cellular and Molecular Pathology Department, Stefan S. Nicolau Institute of Virology, Romanian Academy, Bucharest, Romania
| | - Marius Ataman
- Cellular and Molecular Pathology Department, Stefan S. Nicolau Institute of Virology, Romanian Academy, Bucharest, Romania
| | - Gabriela Mocanu
- Department of Hematology, Coltea Clinical Hospital, Bucharest, Romania
| | - Carmen Saguna
- Department of Radiology, Oncology, and Hematology, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
- Department of Hematology, Coltea Clinical Hospital, Bucharest, Romania
| | - Anca G. Pavel
- Cytogenomic Medical Laboratory Ltd., Bucharest, Romania
| | | | - Elise Sepulchre
- De Duve Institute, Université Catholique de Louvain, Brussels, Belgium
| | - Gabriela Anton
- Molecular Virology Department, Stefan S. Nicolau Institute of Virology, Romanian Academy, Bucharest, Romania
| | - Carmen C. Diaconu
- Cellular and Molecular Pathology Department, Stefan S. Nicolau Institute of Virology, Romanian Academy, Bucharest, Romania
| | - Stefan N. Constantinescu
- De Duve Institute, Université Catholique de Louvain, Brussels, Belgium
- SIGN (Cell Signalling and Molecular Hematology), Ludwig Institute for Cancer Research Brussels, Brussels, Belgium
- Walloon Excellence in Life Sciences and Biotechnology (WELBIO) Department, WEL Research Institute, Wavre, Belgium
- Nuffield Department of Medicine, Ludwig Institute for Cancer Research, Oxford University, Oxford, United Kingdom
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Gecht J, Tsoukakis I, Kricheldorf K, Stegelmann F, Klausmann M, Griesshammer M, Schulz H, Hollburg W, Göthert JR, Sockel K, Heidel FH, Gattermann N, Maintz C, Al-Ali HK, Platzbecker U, Hansen R, Hänel M, Parmentier S, Bommer M, Pahl HL, Lang F, Kirschner M, Isfort S, Brümmendorf TH, Döhner K, Koschmieder S. Kidney Dysfunction Is Associated with Thrombosis and Disease Severity in Myeloproliferative Neoplasms: Implications from the German Study Group for MPN Bioregistry. Cancers (Basel) 2021; 13:cancers13164086. [PMID: 34439237 PMCID: PMC8393882 DOI: 10.3390/cancers13164086] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/29/2021] [Accepted: 08/10/2021] [Indexed: 01/04/2023] Open
Abstract
Simple Summary In patients with myeloproliferative neoplasms (MPN) and in patients with kidney dysfunction, a higher rate of thrombosis has been reported compared with the general population. Furthermore, MPN patients are more prone to develop kidney dysfunction. In our study, we assessed the importance of specific risk factors for kidney dysfunction and thrombosis in MPN patients. We found that the rate of thrombosis is correlated with the degree of kidney dysfunction, especially in myelofibrosis. Significant associations for kidney dysfunction included arterial hypertension, MPN treatment, and increased inflammation, and those for thrombosis comprised arterial hypertension, non-excessive platelet counts, and antithrombotic therapy. The identified risk factor associations varied between MPN subtypes. Our data suggest that kidney dysfunction in MPN patients is associated with an increased risk of thrombosis, mandating closer monitoring, and, possibly, early thromboprophylaxis. Abstract Inflammation-induced thrombosis represents a severe complication in patients with myeloproliferative neoplasms (MPN) and in those with kidney dysfunction. Overlapping disease-specific attributes suggest common mechanisms involved in MPN pathogenesis, kidney dysfunction, and thrombosis. Data from 1420 patients with essential thrombocythemia (ET, 33.7%), polycythemia vera (PV, 38.5%), and myelofibrosis (MF, 27.9%) were extracted from the bioregistry of the German Study Group for MPN. The total cohort was subdivided according to the calculated estimated glomerular filtration rate (eGFR, (mL/min/1.73 m2)) into eGFR1 (≥90, 21%), eGFR2 (60–89, 56%), and eGFR3 (<60, 22%). A total of 29% of the patients had a history of thrombosis. A higher rate of thrombosis and longer MPN duration was observed in eGFR3 than in eGFR2 and eGFR1. Kidney dysfunction occurred earlier in ET than in PV or MF. Multiple logistic regression analysis identified arterial hypertension, MPN treatment, increased uric acid, and lactate dehydrogenase levels as risk factors for kidney dysfunction in MPN patients. Risk factors for thrombosis included arterial hypertension, non-excessive platelet counts, and antithrombotic therapy. The risk factors for kidney dysfunction and thrombosis varied between MPN subtypes. Physicians should be aware of the increased risk for kidney disease in MPN patients, which warrants closer monitoring and, possibly, early thromboprophylaxis.
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Affiliation(s)
- Judith Gecht
- Department of Hematology, Oncology, Hemostaseology and SCT, Faculty of Medicine, RWTH Aachen University, 52074 Aachen, Germany; (J.G.); (I.T.); (K.K.); (M.K.); (S.I.); (T.H.B.)
- Center for Integrated Oncology Aachen Bonn Cologne Düsseldorf (CIO ABCD), 52074 Aachen, Germany;
| | - Ioannis Tsoukakis
- Department of Hematology, Oncology, Hemostaseology and SCT, Faculty of Medicine, RWTH Aachen University, 52074 Aachen, Germany; (J.G.); (I.T.); (K.K.); (M.K.); (S.I.); (T.H.B.)
- Center for Integrated Oncology Aachen Bonn Cologne Düsseldorf (CIO ABCD), 52074 Aachen, Germany;
- Department of Medicine, Hematology/Oncology, Goethe-University, 60590 Frankfurt am Main, Germany;
| | - Kim Kricheldorf
- Department of Hematology, Oncology, Hemostaseology and SCT, Faculty of Medicine, RWTH Aachen University, 52074 Aachen, Germany; (J.G.); (I.T.); (K.K.); (M.K.); (S.I.); (T.H.B.)
- Center for Integrated Oncology Aachen Bonn Cologne Düsseldorf (CIO ABCD), 52074 Aachen, Germany;
| | - Frank Stegelmann
- Department of Internal Medicine III, University Hospital of Ulm, 89081 Ulm, Germany; (F.S.); (K.D.)
| | | | - Martin Griesshammer
- Johannes Wesling Medical Center, University Clinic for Hematology, Oncology, Hemostaseology, and Palliative Care (UKRUB), University of Bochum, 32429 Minden, Germany;
| | | | - Wiebke Hollburg
- HOPA-Hämatologisch-Onkologische Praxis Altona, 22767 Hamburg, Germany;
| | - Joachim R. Göthert
- Department of Hematology and Stem Cell Transplantation, University Hospital Essen, 45147 Essen, Germany;
| | - Katja Sockel
- Medical Clinic and Policlinic I, University Hospital Carl Gustav Carus, TU Dresden, 01307 Dresden, Germany;
| | - Florian H. Heidel
- Innere Medizin C, Universitätsmedizin Greifswald, 17475 Greifswald, Germany;
- Department of Hematology/Oncology, Clinic of Internal Medicine II, Jena University Hospital, 07747 Jena, Germany
| | - Norbert Gattermann
- Center for Integrated Oncology Aachen Bonn Cologne Düsseldorf (CIO ABCD), 52074 Aachen, Germany;
- Department of Hematology, Oncology and Clinical Immunology, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany
| | | | - Haifa K. Al-Ali
- Department of Hematology/Oncology, University Hospital Halle, 06120 Halle, Germany;
| | - Uwe Platzbecker
- Department of Hematology and Cellular Therapy, Medical Clinic and Policlinic I, Leipzig University Hospital, 04103 Leipzig, Germany;
| | - Richard Hansen
- Oncological Practice Dres. Hansen & Reeb, 67655 Kaiserslautern, Germany;
| | - Mathias Hänel
- Department of Internal Medicine III, Klinikum Chemnitz, 09116 Chemnitz, Germany;
| | - Stefani Parmentier
- Department of Hematology and Oncology, Rems-Murr-Klinikum Winnenden, 71364 Winnenden, Germany;
- Onkologie/Hämatologie, Claraspital Tumorzentrum Basel, 4058 Basel, Switzerland
| | - Martin Bommer
- Department of Hematology, Oncology, Infectious Diseases and Palliative Care, Alb-Fils-Kliniken, 73035 Göppingen, Germany;
| | - Heike L. Pahl
- Department of Medicine I, Hematology and Oncology, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany;
| | - Fabian Lang
- Department of Medicine, Hematology/Oncology, Goethe-University, 60590 Frankfurt am Main, Germany;
| | - Martin Kirschner
- Department of Hematology, Oncology, Hemostaseology and SCT, Faculty of Medicine, RWTH Aachen University, 52074 Aachen, Germany; (J.G.); (I.T.); (K.K.); (M.K.); (S.I.); (T.H.B.)
- Center for Integrated Oncology Aachen Bonn Cologne Düsseldorf (CIO ABCD), 52074 Aachen, Germany;
| | - Susanne Isfort
- Department of Hematology, Oncology, Hemostaseology and SCT, Faculty of Medicine, RWTH Aachen University, 52074 Aachen, Germany; (J.G.); (I.T.); (K.K.); (M.K.); (S.I.); (T.H.B.)
- Center for Integrated Oncology Aachen Bonn Cologne Düsseldorf (CIO ABCD), 52074 Aachen, Germany;
| | - Tim H. Brümmendorf
- Department of Hematology, Oncology, Hemostaseology and SCT, Faculty of Medicine, RWTH Aachen University, 52074 Aachen, Germany; (J.G.); (I.T.); (K.K.); (M.K.); (S.I.); (T.H.B.)
- Center for Integrated Oncology Aachen Bonn Cologne Düsseldorf (CIO ABCD), 52074 Aachen, Germany;
| | - Konstanze Döhner
- Department of Internal Medicine III, University Hospital of Ulm, 89081 Ulm, Germany; (F.S.); (K.D.)
| | - Steffen Koschmieder
- Department of Hematology, Oncology, Hemostaseology and SCT, Faculty of Medicine, RWTH Aachen University, 52074 Aachen, Germany; (J.G.); (I.T.); (K.K.); (M.K.); (S.I.); (T.H.B.)
- Center for Integrated Oncology Aachen Bonn Cologne Düsseldorf (CIO ABCD), 52074 Aachen, Germany;
- Correspondence: ; Tel.: +49-241-8036102
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Ido K, Nakane T, Tanizawa N, Makuuchi Y, Okamura H, Koh S, Nanno S, Nishimoto M, Hirose A, Nakamae M, Nakashima Y, Koh H, Hino M, Nakamae H. Acquired Gray Platelet Syndrome Associated with Primary Myelofibrosis. Intern Med 2020; 59:2751-2756. [PMID: 32641652 PMCID: PMC7691020 DOI: 10.2169/internalmedicine.4912-20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A 53-year-old man presented with uncontrolled bleeding caused by acquired platelet dysfunction accompanied by calreticulin-mutated primary myelofibrosis. Based on the detection of abnormal platelets, including large gray platelets, under light microscopy and the loss of the second wave of aggregation observed by light transmission aggregometry, the patient was diagnosed with platelet dysfunction accompanied by myeloproliferative neoplasms (MPNs). In addition, the absence of platelet α-granules was confirmed by electron microscopy. Therefore, this condition may be termed "acquired gray platelet syndrome." Acquired platelet dysfunction must be ruled out when abnormal platelets are observed in patients with MPNs.
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Affiliation(s)
- Kentaro Ido
- Hematology, Graduate School of Medicine, Osaka City University, Japan
| | - Takahiko Nakane
- Hematology, Graduate School of Medicine, Osaka City University, Japan
| | - Nao Tanizawa
- Hematology, Graduate School of Medicine, Osaka City University, Japan
| | - Yosuke Makuuchi
- Hematology, Graduate School of Medicine, Osaka City University, Japan
| | - Hiroshi Okamura
- Hematology, Graduate School of Medicine, Osaka City University, Japan
| | - Shiro Koh
- Hematology, Graduate School of Medicine, Osaka City University, Japan
| | - Satoru Nanno
- Hematology, Graduate School of Medicine, Osaka City University, Japan
| | | | - Asao Hirose
- Hematology, Graduate School of Medicine, Osaka City University, Japan
| | - Mika Nakamae
- Hematology, Graduate School of Medicine, Osaka City University, Japan
| | | | - Hideo Koh
- Hematology, Graduate School of Medicine, Osaka City University, Japan
| | - Masayuki Hino
- Hematology, Graduate School of Medicine, Osaka City University, Japan
| | - Hirohisa Nakamae
- Hematology, Graduate School of Medicine, Osaka City University, Japan
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Abstract
The classical myeloproliferative neoplasms (MPNs) are a group of clonal diseases comprising essential thrombocythaemia (ET), polycythaemia vera (PV) and primary myelofibrosis (PMF). PMF is the rarest disease sub type and has been challenging to address due to the lack of a specific genetic marker, inadequate risk identification models and a highly variable clinical course. Continuous efforts have over time, seen the inclusion of cytogenetic information in prognostic scoring models that have resulted in improved risk stratification models providing further rationale for therapeutic management. Technological advances using single nucleotide polymorphism arrays increased the detection of known and novel MPN related changes and variant detection by massively parallel sequencing provided a large scale screening tool for the multitude of somatic gene mutations that have more recently been described in MPN. Some of these mutations show an association with specific cytogenetic changes or phenotypes. While PMF occurs mainly in adults, it has also been described in paediatric cases and shows distinct histopathological, genetic and clinical features in comparison. This review provides an overview of the genomics landscape of PMF and current developments in MPN therapy.
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Affiliation(s)
- Nisha R Singh
- 1 Department of Genetics, Pathology North-Sydney, St Leonards, NSW, Australia ; 2 Kolling Institute, University of Sydney, NSW, Australia
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