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Smallbone P, Louw A, Purtill D. Laboratory methods of monitoring disease response after allogeneic haematopoietic stem cell transplantation for myelofibrosis. Pathology 2024; 56:24-32. [PMID: 38071159 DOI: 10.1016/j.pathol.2023.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 09/10/2023] [Accepted: 10/06/2023] [Indexed: 01/24/2024]
Abstract
The era of molecular prognostication in myelofibrosis has allowed comprehensive assessment of disease risk and informed decisions regarding allogeneic haematopoietic stem cell transplantation (HSCT). However, monitoring disease response after transplantation is difficult, and limited by disease and sample-related factors. The emergence of laboratory techniques sensitive enough to monitor measurable residual disease is promising in predicting molecular and haematological relapse and guiding management. This paper summarises the existing literature regarding methods for detecting and monitoring disease response after HSCT in myelofibrosis and explores the therapeutic use of measurable residual disease (MRD) assays in transplant recipients. Laboratory assessment of disease response in myelofibrosis post-allogeneic transplant is limited by disease and treatment characteristics and by the sensitivity of available conventional molecular assays. The identification of MRD has prognostic implications and may allow early intervention to prevent relapse. Further applicability is limited by mutation-specific assay variability, a lack of standardisation and sample considerations.
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Affiliation(s)
- Portia Smallbone
- Department of Haematology, Fiona Stanley Hospital, Perth, WA, Australia; PathWest, Fiona Stanley Hospital, Perth, WA, Australia.
| | - Alison Louw
- PathWest, Fiona Stanley Hospital, Perth, WA, Australia
| | - Duncan Purtill
- Department of Haematology, Fiona Stanley Hospital, Perth, WA, Australia; PathWest, Fiona Stanley Hospital, Perth, WA, Australia
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2
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Al-Shaibani E, Bautista R, Lipton JH, Kim DD, Viswabandya A, Kumar R, Lam W, Law AD, Al-Shaibani Z, Gerbitz A, Pasic I, Mattsson J, Michelis FV. Comparison of Outcomes After Second Allogeneic Hematopoietic Cell Transplantation Versus Donor Lymphocyte Infusion in Allogeneic Hematopoietic Cell Transplant Patients. CLINICAL LYMPHOMA, MYELOMA & LEUKEMIA 2022; 22:e327-e334. [PMID: 34866020 DOI: 10.1016/j.clml.2021.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 11/03/2021] [Accepted: 11/04/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Allogeneic hematopoietic cell transplantation (HCT) is potentially curative for hematological disease however can be complicated by relapse or graft failure (GF), for which second-HCT and donor lymphocyte infusions (DLI) are performed. This study aimed to compare outcomes following the two interventions. METHODS We retrospectively investigated 89 patients with relapse or GF after first-HCT, 50 (56%) underwent second HCT and 39 (44%) received (DLI), from June 2011 to September 2020. RESULTS Median age at intervention was 55 years (19-72). Second-HCT was performed for relapse in 19 patients and for GF in 31 patients (primary GF in 11 and secondary in 20 patients), same donor was used in 25 (50%) patients. DLI was performed for relapse in 20 and for secondary GF in 19 patients. Median number of DLI administered was 2 (range 1-11). Univariate analysis demonstrated 2 year overall survival (OS) for second-HCT was superior when performed for relapse (65%) compared to GF (44%) (P = .03). For DLI patients, 2 year OS was 49% for GF and 45% for relapse patients (P = .49). For relapse as an indication, second-HCT demonstrated borderline superiority compared to DLI (P = .07). Multivariable analysis demonstrated for OS for the entire cohort demonstrated donor mismatch (HR 0.50, 95% CI 0.26%-0.94%, P = .03), KPS at time of intervention (HR 2.10, 95% CI 1.14%-3.85%, P = .02) and time from first-HCT to intervention (HR 0.51, 95% CI 0.28%-0.93%, P = .03) as significant variables. CONCLUSION Second-HCT may improve outcomes when performed for relapse post-transplant if patients achieve remission again, while DLI may be reserved for patients with active disease.
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Affiliation(s)
- Eshrak Al-Shaibani
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Rhida Bautista
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Jeffrey H Lipton
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Dennis D Kim
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Auro Viswabandya
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Rajat Kumar
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Wilson Lam
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Arjun D Law
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Zeyad Al-Shaibani
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Armin Gerbitz
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Ivan Pasic
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Jonas Mattsson
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Fotios V Michelis
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada.
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Digital-droplet PCR assays for IDH, DNMT3A and driver mutations to monitor after allogeneic stem cell transplantation minimal residual disease of myelofibrosis. Bone Marrow Transplant 2022; 57:510-512. [PMID: 35046544 PMCID: PMC8907061 DOI: 10.1038/s41409-022-01566-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/15/2021] [Accepted: 01/05/2022] [Indexed: 12/23/2022]
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Cross NCP, Godfrey AL, Cargo C, Garg M, Mead AJ. The use of genetic tests to diagnose and manage patients with myeloproliferative and myeloproliferative/myelodysplastic neoplasms, and related disorders. Br J Haematol 2021; 195:338-351. [PMID: 34409596 DOI: 10.1111/bjh.17766] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Accepted: 07/28/2021] [Indexed: 12/11/2022]
Affiliation(s)
- Nicholas C P Cross
- Wessex Regional Genetics Laboratory, Salisbury District Hospital, Salisbury, UK
- Faculty of Medicine, University of Southampton, Southampton, UK
| | - Anna L Godfrey
- Haematopathology & Oncology Diagnostics Service, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Catherine Cargo
- Haematological Malignancy Diagnostic Service, Leeds Cancer Centre, St James's University Hospital, Leeds, UK
| | - Mamta Garg
- Leicester Royal Infirmary, Infirmary Square, Leicester, UK
| | - Adam J Mead
- MRC Molecular Haematology Unit, NIHR Oxford Biomedical Research Centre, MRC Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK
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CRISPR/Cas12a-Based Ultrasensitive and Rapid Detection of JAK2 V617F Somatic Mutation in Myeloproliferative Neoplasms. BIOSENSORS-BASEL 2021; 11:bios11080247. [PMID: 34436049 PMCID: PMC8394843 DOI: 10.3390/bios11080247] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 07/20/2021] [Accepted: 07/22/2021] [Indexed: 12/15/2022]
Abstract
The JAK2 V617F mutation is a major diagnostic, therapeutic, and monitoring molecular target of Philadelphia-negative myeloproliferative neoplasms (MPNs). To date, numerous methods of detecting the JAK2 V617F mutation have been reported, but there is no gold-standard diagnostic method for clinical applications. Here, we developed and validated an efficient Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)/CRISPR associated protein 12a (Cas12a)-based assay to detect the JAK2 V617F mutation. Our results showed that the sensitivity of the JAK2 V617F/Cas12a fluorescence detection system was as high as 0.01%, and the JAK2 V617F/Cas12a lateral flow strip assay could unambiguously detect as low as 0.5% of the JAK2 V617F mutation, which was much higher than the sensitivity required for clinical application. The minimum detectable concentration of genomic DNA achieved was 0.01 ng/μL (~5 aM, ~3 copies/μL). In addition, the whole process only took about 1.5 h, and the cost of an individual test was much lower than that of the current assays. Thus, our methods can be applied to detect the JAK2 V617F mutation, and they are highly sensitive, rapid, cost-effective, and convenient.
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Srour SA, Olson A, Ciurea SO, Desai P, Bashir Q, Oran B, Bose P, Mehta R, Patel KP, Pemmaraju N, Daver N, Verstovsek S, Champlin RE, Popat UR. Mixed myeloid chimerism and relapse of myelofibrosis after allogeneic stem cell transplantation. Haematologica 2021; 106:1988-1990. [PMID: 31296578 PMCID: PMC8252931 DOI: 10.3324/haematol.2019.223503] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Indexed: 12/04/2022] Open
Affiliation(s)
| | - Amanda Olson
- The University of Texas MD Anderson Cancer Center
| | | | - Parth Desai
- The University of Texas Health Science Center at San Antonio
| | | | - Betul Oran
- The University of Texas, M.D. Anderson Cancer Center
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Makarik TV, Abdullaev AO, Nikulina EE, Treglazova SA, Stepanova EE, Subortseva IN, Kovrigina AM, Melikyan AL, Kulikov SM, Sudarikov AB. Low JAK2 V617F Allele Burden in Ph-Negative Chronic Myeloproliferative Neoplasms Is Associated with Additional CALR or MPL Gene Mutations. Genes (Basel) 2021; 12:genes12040559. [PMID: 33921387 PMCID: PMC8069892 DOI: 10.3390/genes12040559] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 04/07/2021] [Accepted: 04/08/2021] [Indexed: 01/08/2023] Open
Abstract
JAK2 (Janus kinase 2) V617F, CALR (Calreticulin) exon 9, and MPL (receptor for thrombopoietin) exon 10 mutations are associated with the vast majority of Ph-negative chronic myeloproliferative neoplasms (MPNs). These mutations affect sequential stages of proliferative signal transduction and therefore, after the emergence of one type of mutation, other types should not have any selective advantages for clonal expansion. However, simultaneous findings of these mutations have been reported by different investigators in up to 10% of MPN cases. Our study includes DNA samples from 1958 patients with clinical evidence of MPN, admitted to the National Research Center for Hematology for genetic analysis between 2016 and 2019. In 315 of 1402 cases (22.6%), CALR mutations were detected. In 23 of these 315 cases (7.3%), the JAK2 V617F mutation was found in addition to the CALR mutation. In 16 from 24 (69.6%) cases, with combined CALR and JAK2 mutations, V617F allele burden was lower than 1%. A combination of JAK2 V617F with MPL W515L/K was also observed in 1 out of 1348 cases, only. JAK2 allele burden in this case was also lower than 1%. Additional mutations may coexist over the low background of JAK2 V617F allele. Therefore, in cases of detecting MPNs with a low allelic load JAK2 V617F, it may be advisable to search for other molecular markers, primarily mutations in exon 9 of CALR. The load of the combined mutations measured at different time points may indicate that, at least in some cases, these mutations could be represented by different clones of malignant cells.
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Moncada A, Pancrazzi A. Lab tests for MPN. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2021; 366:187-220. [PMID: 35153004 DOI: 10.1016/bs.ircmb.2021.02.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Molecular laboratory investigations for myeloproliferative neoplasm (MPN) can ideally be divided into two distincts groups, those for the detection of the BCR-ABL rearrangement (suspect of chronic myeloid leukemia) and those for the variants determination of the driver genes of the negative Philadelphia forms (MPN Ph neg). The BCR-ABL detection is based on RT-Polymerase Chain Reaction techniques and more recently on droplet digital PCR (ddPCR). For this type of analysis, combined with chromosome banding analysis (CBA) and Fluorescent in situ hybridization (FISH), it is essential to quantify BCR-ABL mutated copies by standard curve method. The investigation on driver genes for MPN Ph neg forms includes activity for erythroid forms such as Polycythemia Vera (test JAK2V617F and JAK2 exon 12), for non-erythroid forms such as essential thrombocythemia and myelofibrosis (test JAK2V617F, CALR exon 9, MPL exon 10), for "atypical" ones such as mastocytosis (cKIT D816V test) and for hypereosinophilic syndrome (FIP1L1-PDGFRalpha test). It's crucial to assign prognosis value through calculating allelic burden of JAK2 V617F variant and determining CALR esone 9 variants (type1/1like, type2/2like and atypical ones). A fundamental innovation for investigating triple negative cases for JAK2, CALR, MPL and for providing prognostic score is the use of Next Generation Sequencing panels containing high molecular risk genes as ASXL1, EZH2, TET2, IDH1/IDH2, SRSF2. This technique allows to detect additional or subclonal mutations which are usually acquired in varying sized sub-clones of hematopoietic progenitors. These additional variants have a prognostic significance and should be indagated to exclude false negative cases.
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Affiliation(s)
- Alice Moncada
- Laboratory Medicine Department, Molecular and Clinical Pathology Sector, Azienda USL Toscana Sudest, Ospedale San Donato, Arezzo, Italy
| | - Alessandro Pancrazzi
- Laboratory Medicine Department, Molecular and Clinical Pathology Sector, Azienda USL Toscana Sudest, Ospedale San Donato, Arezzo, Italy.
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Janjetovic S, Beckmann L, Holstein K, Rolling C, Thiele B, Schafhausen P, Schön G, Bokemeyer C, Langer F, Voigtlaender M. Prevalence of definite antiphospholipid syndrome in carriers of the JAK2 V617F mutation. Thromb Res 2020; 198:55-61. [PMID: 33290883 DOI: 10.1016/j.thromres.2020.11.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 10/28/2020] [Accepted: 11/20/2020] [Indexed: 12/18/2022]
Abstract
INTRODUCTION Patients with Philadelphia-negative myeloproliferative neoplasms (MPNs), particularly those carrying the JAK2V617F mutation, are at increased risk of thrombosis. While an association of MPNs with autoimmune disorders has been established, the prevalence of inherited or acquired thrombophilias in JAK2V617F-positive patients remains obscure. We therefore investigated the coincidence of the JAK2V617F mutation with additional thrombogenic risk factors. METHODS In a retrospective study, we analyzed all patients referred for thrombophilia work-up between 01/2011 and 08/2019, in whom additional JAK2V617F mutation analysis was performed because of thromboembolic events that were recurrent, atypically located and/or associated with abnormal blood counts. RESULTS Of 472 tested patients, 49 (10.4%) were JAK2V617F-positive. While the frequency of inherited thrombophilias (factor V Leiden and prothrombin G20210A mutation, deficiency of antithrombin, protein C, protein S) was not different between the two groups, the prevalence of definite antiphospholipid syndrome (APS), mostly associated with a moderate- or high-risk antibody profile, was significantly higher in patients with (22.4%) than in those without (8.4%) JAK2V617F mutation (p < 0.01). All evaluable JAK2V617F-positive patients with APS were subsequently diagnosed with MPN. In patients with JAK2V617F mutation, presence of concomitant APS was associated with a significantly younger age (49 ± 14 vs. 60 ± 15 years) at the time of thrombophilia work-up (p < 0.05). CONCLUSION We found a significant association between JAK2V617F-positive MPN and definite APS. The presence of concomitant APS in patients carrying the JAK2V617F mutation may lead to earlier manifestation of thromboembolic events and may warrant more aggressive antithrombotic treatment strategies to prevent recurrence.
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Affiliation(s)
- Snjezana Janjetovic
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Lennart Beckmann
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Katharina Holstein
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Christina Rolling
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Benjamin Thiele
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Philippe Schafhausen
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Gerhard Schön
- Department of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Carsten Bokemeyer
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Florian Langer
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Minna Voigtlaender
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany.
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Rumi E, Trotti C, Vanni D, Casetti IC, Pietra D, Sant’Antonio E. The Genetic Basis of Primary Myelofibrosis and Its Clinical Relevance. Int J Mol Sci 2020; 21:E8885. [PMID: 33255170 PMCID: PMC7727658 DOI: 10.3390/ijms21238885] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 11/22/2020] [Accepted: 11/23/2020] [Indexed: 01/05/2023] Open
Abstract
Among classical BCR-ABL-negative myeloproliferative neoplasms (MPN), primary myelofibrosis (PMF) is the most aggressive subtype from a clinical standpoint, posing a great challenge to clinicians. Whilst the biological consequences of the three MPN driver gene mutations (JAK2, CALR, and MPL) have been well described, recent data has shed light on the complex and dynamic structure of PMF, that involves competing disease subclones, sequentially acquired genomic events, mostly in genes that are recurrently mutated in several myeloid neoplasms and in clonal hematopoiesis, and biological interactions between clonal hematopoietic stem cells and abnormal bone marrow niches. These observations may contribute to explain the wide heterogeneity in patients' clinical presentation and prognosis, and support the recent effort to include molecular information in prognostic scoring systems used for therapeutic decision-making, leading to promising clinical translation. In this review, we aim to address the topic of PMF molecular genetics, focusing on four questions: (1) what is the role of mutations on disease pathogenesis? (2) what is their impact on patients' clinical phenotype? (3) how do we integrate gene mutations in the risk stratification process? (4) how do we take advantage of molecular genetics when it comes to treatment decisions?
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Affiliation(s)
- Elisa Rumi
- Department of Molecular Medicine, University of Pavia, 27100 Pavia, Italy; (C.T.); (D.V.); (I.C.C.)
- Hematology, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy;
| | - Chiara Trotti
- Department of Molecular Medicine, University of Pavia, 27100 Pavia, Italy; (C.T.); (D.V.); (I.C.C.)
| | - Daniele Vanni
- Department of Molecular Medicine, University of Pavia, 27100 Pavia, Italy; (C.T.); (D.V.); (I.C.C.)
| | - Ilaria Carola Casetti
- Department of Molecular Medicine, University of Pavia, 27100 Pavia, Italy; (C.T.); (D.V.); (I.C.C.)
- Hematology, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy;
| | - Daniela Pietra
- Hematology, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy;
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Atagunduz IK, Christopeit M, Ayuk F, Zeck G, Wolschke C, Kröger N. Incidence and Outcome of Late Relapse after Allogeneic Stem Cell Transplantation for Myelofibrosis. Biol Blood Marrow Transplant 2020; 26:2279-2284. [PMID: 32949753 DOI: 10.1016/j.bbmt.2020.09.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/01/2020] [Accepted: 09/13/2020] [Indexed: 12/11/2022]
Abstract
In this cross-sectional study, we retrospectively evaluated the files of 227 patients with myelofibrosis who underwent transplantation between 1994 and 2015 for relapse later than 5 years after allogeneic stem cell transplantation (SCT). A total of 94 patients who were alive and in remission at 5 years were identified with follow-up of at least 5 years (median, 9.15 years) after SCT. Thirteen patients (14%) experienced late molecular (n = 6) or hematologic (n = 7) relapse at a median of 7.1 years while 81 patients did not experience relapse. Relapse patients received either donor lymphocyte infusion (DLI) (n = 7) and/or second transplantation (n = 4). Of those, 72.7% achieved again full donor cell chimerism and molecular remission, and after a median follow-up of 45 months, the 3-year overall survival rates for patients with or without relapse were 90.9% (95% confidence interval [CI], 77% to 100%) and 98.8% (95% CI, 96% to 100%), respectively (P = .13). We conclude that late relapse occurs in about 14% of the patients and the majority can be successfully salvaged with DLI and/or second allograft. All patients with molecular relapse are alive and support the long-time molecular monitoring in myelofibrosis patients after allogeneic SCT.
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Affiliation(s)
- Isik Kaygusuz Atagunduz
- University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Marmara University Pendik Training and Research Hospital, Istanbul, Turkey
| | | | - Francis Ayuk
- University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Gaby Zeck
- University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Nicolaus Kröger
- University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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12
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Coccaro N, Tota G, Anelli L, Zagaria A, Specchia G, Albano F. Digital PCR: A Reliable Tool for Analyzing and Monitoring Hematologic Malignancies. Int J Mol Sci 2020; 21:ijms21093141. [PMID: 32365599 PMCID: PMC7247671 DOI: 10.3390/ijms21093141] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 04/24/2020] [Accepted: 04/27/2020] [Indexed: 02/06/2023] Open
Abstract
The digital polymerase chain reaction (dPCR) is considered to be the third-generation polymerase chain reaction (PCR), as it yields direct, absolute and precise measures of target sequences. dPCR has proven particularly useful for the accurate detection and quantification of low-abundance nucleic acids, highlighting its advantages in cancer diagnosis and in predicting recurrence and monitoring minimal residual disease, mostly coupled with next generation sequencing. In the last few years, a series of studies have employed dPCR for the analysis of hematologic malignancies. In this review, we will summarize these findings, attempting to focus on the potential future perspectives of the application of this promising technology.
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Affiliation(s)
| | | | | | | | | | - Francesco Albano
- Correspondence: ; Tel.: +39-(0)80-5478031; Fax: +39-(0)80-5508369
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13
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Penter L, Wu CJ. Personal tumor antigens in blood malignancies: genomics-directed identification and targeting. J Clin Invest 2020; 130:1595-1607. [PMID: 31985488 PMCID: PMC7108890 DOI: 10.1172/jci129209] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Hematological malignancies have long been at the forefront of the development of novel immune-based treatment strategies. The earliest successful efforts originated from the extensive body of work in the field of allogeneic hematopoietic stem cell transplantation. These efforts laid the foundation for the recent exciting era of cancer immunotherapy, which includes immune checkpoint blockade, personal neoantigen vaccines, and adoptive T cell transfer. At the heart of the specificity of these novel strategies is the recognition of target antigens presented by malignant cells to T cells. Here, we review the advances in systematic identification of minor histocompatibility antigens and neoantigens arising from personal somatic alterations or recurrent driver mutations. These exciting efforts pave the path for the implementation of personalized combinatorial cancer therapy.
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Affiliation(s)
- Livius Penter
- Department of Hematology, Oncology, and Tumor Immunology, Charité – Universitätsmedizin Berlin (CVK), Berlin, Germany
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Catherine J. Wu
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
- Broad Institute, Massachusetts Institute of Technology and Harvard University, Cambridge, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
- Department of Medicine, Brigham and Women’s Hospital, Boston, Massachusetts, USA
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14
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Daghia G, Zabelina T, Zeck G, von Pein U, Christopeit M, Wolschke C, Ayuk F, Kröger N. Allogeneic stem cell transplantation for myelofibrosis patients aged ≥65 years. Eur J Haematol 2019; 103:370-378. [DOI: 10.1111/ejh.13294] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 06/28/2019] [Accepted: 06/29/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Giulia Daghia
- Department of Stem Cell Transplantation University Medical Center Hamburg‐Eppendorf Hamburg Germany
- Ospedale SM delle Croci, Sezione di Ematologia e Unità Trapianto Cellule Staminali Azienda Ospedaliera della Romagna Ravenna Italy
| | - Tatjana Zabelina
- Department of Stem Cell Transplantation University Medical Center Hamburg‐Eppendorf Hamburg Germany
| | - Gaby Zeck
- Department of Stem Cell Transplantation University Medical Center Hamburg‐Eppendorf Hamburg Germany
| | - Ute‐Marie von Pein
- Department of Stem Cell Transplantation University Medical Center Hamburg‐Eppendorf Hamburg Germany
| | - Maximilian Christopeit
- Department of Stem Cell Transplantation University Medical Center Hamburg‐Eppendorf Hamburg Germany
| | - Christine Wolschke
- Department of Stem Cell Transplantation University Medical Center Hamburg‐Eppendorf Hamburg Germany
| | - Francis Ayuk
- Department of Stem Cell Transplantation University Medical Center Hamburg‐Eppendorf Hamburg Germany
| | - Nicolaus Kröger
- Department of Stem Cell Transplantation University Medical Center Hamburg‐Eppendorf Hamburg Germany
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15
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Palumbo GA, Stella S, Pennisi MS, Pirosa C, Fermo E, Fabris S, Cattaneo D, Iurlo A. The Role of New Technologies in Myeloproliferative Neoplasms. Front Oncol 2019; 9:321. [PMID: 31106152 PMCID: PMC6498877 DOI: 10.3389/fonc.2019.00321] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 04/09/2019] [Indexed: 12/17/2022] Open
Abstract
The hallmark of BCR-ABL1-negative myeloproliferative neoplasms (MPNs) is the presence of a driver mutation in JAK2, CALR, or MPL gene. These genetic alterations represent a key feature, useful for diagnostic, prognostic and therapeutical approaches. Molecular biology tests are now widely available with different specificity and sensitivity. Recently, the allele burden quantification of driver mutations has become a useful tool, both for prognostication and efficacy evaluation of therapies. Moreover, other sub-clonal mutations have been reported in MPN patients, which are associated with poorer prognosis. ASXL1 mutation appears to be the worst amongst them. Both driver and sub-clonal mutations are now taken into consideration in new prognostic scoring systems and may be better investigated using next generation sequence (NGS) technology. In this review we summarize the value of NGS and its contribution in providing a comprehensive picture of mutational landscape to guide treatment decisions. Finally, discussing the role that NGS has in defining the potential risk of disease development, we forecast NGS as the standard molecular biology technique for evaluating these patients.
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Affiliation(s)
- Giuseppe A Palumbo
- Department of Scienze Mediche, Chirurgiche e Tecnologie Avanzate "G.F. Ingrassia," University of Catania, Catania, Italy
| | - Stefania Stella
- Center of Experimental Oncology and Hematology, A.O.U. Policlinico-Vittorio Emanuele, Catania, Italy.,Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Maria Stella Pennisi
- Center of Experimental Oncology and Hematology, A.O.U. Policlinico-Vittorio Emanuele, Catania, Italy.,Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Cristina Pirosa
- Postgraduate School of Hematology, University of Catania, Catania, Italy
| | - Elisa Fermo
- Hematology Division, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Sonia Fabris
- Hematology Division, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Daniele Cattaneo
- Hematology Division, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Alessandra Iurlo
- Hematology Division, Myeloproliferative Syndromes Unit, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
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16
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Abstract
Compared to DNA, analysis of RNA is one step closer on the central dogma of biology to assessing cellular function. This makes it an extremely valuable target for research and clinical testing in nearly all areas of molecular biology. Most RNA molecules are ephemeral by nature. They exist as temporary intermediates, ostensibly enabling data transfer between the genome and the organism. Their ribose backbone renders them sensitive to simple degradation over time and they are the target molecule for numerous and abundant ribonucleases which have evolved to chop them to pieces with extreme efficiency. At the biochemical level, this means that they degrade rapidly in most physiological and laboratory conditions and are thus challenging to study. When considering specimen banking, it is critical to keep this reality in mind, as some commonly used banking modalities will not adequately preserve the relevant RNA molecules in a measureable state.In this chapter, we explore the broad range of RNA testing methodologies in current use, with particular focus on how specimen preparation impacts analysis. Following an overview in the introduction, Subheading 2 covers the major specimen types amenable to RNA analysis in the context of biobanking. Subheading 3 discusses the applications of various RNA analysis modalities to research and clinical testing.
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Maslah N, Verger E, Schlageter MH, Miclea JM, Kiladjian JJ, Giraudier S, Chomienne C, Cassinat B. Next-generation sequencing for JAK2 mutation testing: advantages and pitfalls. Ann Hematol 2018; 98:111-118. [PMID: 30259120 DOI: 10.1007/s00277-018-3499-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 09/17/2018] [Indexed: 01/16/2023]
Abstract
The JAK2V617F mutation is part of the major criteria for diagnosis of myeloproliferative neoplasms (MPN). Allele-specific quantitative PCR (qPCR) is the most prevalent method used in laboratories but with the advent of next-generation sequencing (NGS) techniques, we felt necessary to evaluate this approach for JAK2 mutations testing. Among DNA samples from 427 patients analyzed by qPCR and NGS, we found an excellent concordance between both methods when allelic burden was superior to 2% (the detection limit of our NGS assay). Only one sample among 298 was found negative by NGS while allelic burden by qPCR was 3%. Because NGS detection limit is higher, sensitivity was lower as exemplified by 21 samples found negative whereas qPCR measured allelic burdens between 0.1 and 1%. Importantly, quantitative data of samples found positive by both techniques were highly correlated (R2 = 0.9477). We also evaluated 40 samples tested for JAK2 exon 12 mutations by HRM. The concordance with NGS was of 100%. Using NGS, the full coding region of JAK2 was analyzed leading to identification of several variants outside of exon 12 and 14 which were previously described or not. Interestingly, we found one somatic mutation (c.1034A>T p.H345L) which induced constitutive activation of the JAK/STAT pathway leading to an increased proliferation of BaF/3 cells with low-dose EPO. This study showed that NGS is a robust method highly correlated to qPCR, although less sensitive, but providing the opportunity to identify other JAK2 variants with potential impact on disease initiation or evolution.
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Affiliation(s)
- Nabih Maslah
- APHP, Laboratoire de Biologie Cellulaire, Hopital Saint-Louis, 1 avenue Claude Vellefaux, 75010, Paris, France
- INSERM, UMRS_1131, Institut Universitaire d'Hématologie, Hopital Saint-Louis, Université Paris-Diderot, Paris, France
| | - Emmanuelle Verger
- APHP, Laboratoire de Biologie Cellulaire, Hopital Saint-Louis, 1 avenue Claude Vellefaux, 75010, Paris, France
- INSERM, UMRS_1131, Institut Universitaire d'Hématologie, Hopital Saint-Louis, Université Paris-Diderot, Paris, France
| | - Marie-Helene Schlageter
- APHP, Laboratoire de Biologie Cellulaire, Hopital Saint-Louis, 1 avenue Claude Vellefaux, 75010, Paris, France
- INSERM, UMRS_1131, Institut Universitaire d'Hématologie, Hopital Saint-Louis, Université Paris-Diderot, Paris, France
| | - Jean-Michel Miclea
- Service d'Oncologie et d'Hematologie, Hopital Louis Pasteur, Chartres, France
| | - Jean-Jacques Kiladjian
- INSERM, UMRS_1131, Institut Universitaire d'Hématologie, Hopital Saint-Louis, Université Paris-Diderot, Paris, France
- APHP, Centre d'Investigations Cliniques, Hopital Saint-Louis, Paris, France
- Universite Paris Diderot, Paris, France
| | - Stephane Giraudier
- APHP, Laboratoire de Biologie Cellulaire, Hopital Saint-Louis, 1 avenue Claude Vellefaux, 75010, Paris, France
- INSERM, UMRS_1131, Institut Universitaire d'Hématologie, Hopital Saint-Louis, Université Paris-Diderot, Paris, France
- Universite Paris Diderot, Paris, France
| | - Christine Chomienne
- APHP, Laboratoire de Biologie Cellulaire, Hopital Saint-Louis, 1 avenue Claude Vellefaux, 75010, Paris, France
- INSERM, UMRS_1131, Institut Universitaire d'Hématologie, Hopital Saint-Louis, Université Paris-Diderot, Paris, France
- Universite Paris Diderot, Paris, France
| | - Bruno Cassinat
- APHP, Laboratoire de Biologie Cellulaire, Hopital Saint-Louis, 1 avenue Claude Vellefaux, 75010, Paris, France.
- INSERM, UMRS_1131, Institut Universitaire d'Hématologie, Hopital Saint-Louis, Université Paris-Diderot, Paris, France.
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ASXL1/EZH2 mutations promote clonal expansion of neoplastic HSC and impair erythropoiesis in PMF. Leukemia 2018; 33:99-109. [PMID: 29907810 DOI: 10.1038/s41375-018-0159-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 04/06/2018] [Accepted: 04/25/2018] [Indexed: 01/02/2023]
Abstract
Primary myelofibrosis (PMF) is a hematopoietic stem cell (HSC) disease, characterized by aberrant differentiation of all myeloid lineages and profound disruption of the bone marrow niche. PMF samples carry several mutations, but their cell origin and hierarchy in regulating the different waves of clonal and aberrant myeloproliferation from the prime HSC compartment is poorly understood. Genotyping of >2000 colonies from CD133+HSC and progenitors from PMF patients confirmed the complex genetic heterogeneity within the neoplastic population. Notably, mutations in chromatin regulators ASXL1 and/or EZH2 were identified as the first genetic lesions, preceding both JAK2-V617F and CALR mutations, and are thus drivers of clonal myelopoiesis in a PMF subset. HSC from PMF patients with double ASXL1/EZH2 mutations exhibited significantly higher engraftment in immunodeficient mice than those from patients without histone modifier mutations. EZH2 mutations correlate with aberrant erythropoiesis in PMF patients, exemplified by impaired maturation and cell cycle arrest of erythroid progenitors. These data underscore the importance of post-transcriptional modifiers of histones in neoplastic stem cells, whose clonal growth sustains aberrant myelopoiesis and expansion of pre-leukemic clones in PMF.
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Hsu CC, Huang CE, Wu YY, Chen YY, Lung J, Leu YW, Li CP, Tsou HY, Chuang WH, Lu CH, Chen CC. Quantitative competitive allele-specific TaqMan duplex PCR (qCAST-Duplex PCR) assay: a refined method for highly sensitive and specific detection of JAK2V617F mutant allele burdens. Haematologica 2018; 103:e450-e454. [PMID: 29748437 DOI: 10.3324/haematol.2018.187989] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Affiliation(s)
- Chia-Chen Hsu
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi
| | - Cih-En Huang
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi.,College of Medicine, Chang Gung University, Tao-Yuan
| | - Yu-Ying Wu
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi
| | - Yi-Yang Chen
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi
| | - Jrhau Lung
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Chang Gung Memorial Hospital, Chiayi
| | - Yu-Wei Leu
- Department of Biomedical Science, National Chung-Cheng University, Chiayi, Taiwan
| | - Chian-Pei Li
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi
| | - Hsing-Yi Tsou
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi
| | - Wei-Hsuan Chuang
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi
| | - Chang-Hsien Lu
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi.,College of Medicine, Chang Gung University, Tao-Yuan
| | - Chih-Cheng Chen
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi .,College of Medicine, Chang Gung University, Tao-Yuan
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20
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Perricone M, Palandri F, Ottaviani E, Angelini M, Bagli L, Bellesia E, Donati M, Gemmati D, Zucchini P, Mancini S, Marchica V, Trubini S, De Matteis G, Di Zacomo S, Favarato M, Fioroni A, Bolzonella C, Maccari G, Navaglia F, Gatti D, Toffolatti L, Orlandi L, Laloux V, Manfrini M, Galieni P, Giannini B, Tieghi A, Barulli S, Serino ML, Maccaferri M, Scortechini AR, Giuliani N, Vallisa D, Bonifacio M, Accorsi P, Salbe C, Fazio V, Gusella M, Toffoletti E, Salvucci M, Svaldi M, Gherlinzoni F, Cassavia F, Orsini F, Martinelli G. Assessment of the interlaboratory variability and robustness of JAK2V617F mutation assays: A study involving a consortium of 19 Italian laboratories. Oncotarget 2018; 8:32608-32617. [PMID: 28427233 PMCID: PMC5464813 DOI: 10.18632/oncotarget.15940] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 02/22/2017] [Indexed: 11/25/2022] Open
Abstract
To date, a plenty of techniques for the detection of JAK2V617F is used over different laboratories, with substantial differences in specificity and sensitivity. Therefore, to provide reliable and comparable results, the standardization of molecular techniques is mandatory. A network of 19 centers was established to 1) evaluate the inter- and intra-laboratory variability in JAK2V617F quantification, 2) identify the most robust assay for the standardization of the molecular test and 3) allow consistent interpretation of individual patient analysis results. The study was conceived in 3 different rounds, in which all centers had to blindly test DNA samples with different JAK2V617F allele burden (AB) using both quantitative and qualitative assays. The positivity of samples with an AB < 1% was not detected by qualitative assays. Conversely, laboratories performing the quantitative approach were able to determine the expected JAK2V617F AB. Quantitative results were reliable across all mutation loads with moderate variability at low AB (0.1 and 1%; CV = 0.46 and 0.77, respectively). Remarkably, all laboratories clearly distinguished between the 0.1 and 1% mutated samples. In conclusion, a qualitative approach is not sensitive enough to detect the JAK2V617F mutation, especially at low AB. On the contrary, the ipsogen JAK2 MutaQuant CE-IVD kit resulted in a high, efficient and sensitive quantification detection of all mutation loads. This study sets the basis for the standardization of molecular techniques for JAK2V617F determination, which will require the employment of approved operating procedures and the use of certificated standards, such as the recent WHO 1st International Reference Panel for Genomic JAK2V617F.
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Affiliation(s)
- Margherita Perricone
- Department of Experimental, Diagnostic and Specialty Medicine, Institute of Hematology 'L. and A. Seràgnoli', University of Bologna, S. Orsola-Malpighi Hospital, Bologna, Italy
| | - Francesca Palandri
- Department of Experimental, Diagnostic and Specialty Medicine, Institute of Hematology 'L. and A. Seràgnoli', University of Bologna, S. Orsola-Malpighi Hospital, Bologna, Italy
| | - Emanuela Ottaviani
- Department of Experimental, Diagnostic and Specialty Medicine, Institute of Hematology 'L. and A. Seràgnoli', University of Bologna, S. Orsola-Malpighi Hospital, Bologna, Italy
| | - Mario Angelini
- Molecular Hematology Laboratory U.O.C of Hematology Hospital Mazzoni, Ascoli Piceno, Italy
| | - Laura Bagli
- Medical Genetics Unit- Hub Laboratory AUSL Romagna, Pievesestina di Cesena, Italy
| | - Enrica Bellesia
- Imaging and Laboratory Diagnostic Department, Clinical Chemistry and Endocrinology Laboratory, Hematology Unit, Oncology and Technology Department, Hospital S. Maria Nuova, IRCCS, Reggio Emilia, Italy
| | - Meris Donati
- Clinical Pathology Laboratory, A.O. Ospedali Riuniti Marche Nord, Pesaro, Italy
| | - Donato Gemmati
- Center Hemostasis and Thrombosis, Section of Medical Biochemistry, Molecular Biology and Genetics, Department of Biomedical and Specialty Surgical Sciences, University of Ferrara, Ferrara, Italy
| | - Patrizia Zucchini
- Department of Medical and Surgical Sciences, Division of Hematology, University of Modena and Reggio Emilia, Modena, Italy
| | - Stefania Mancini
- Clinical Hematology Laboratory, Department of Molecular and Clinical Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Valentina Marchica
- Department of Clinical and Experimental Medicine, University of Parma, Parma, Italy
| | - Serena Trubini
- Clinical Pathology, Molecular Biology Laboratory, and Hematology/Bone Marrow Transplantation Unit, AUSL Piacenza, Piacenza, Italy
| | - Giovanna De Matteis
- Section of Clinical Biochemistry and Section of Hematology, Azienda Ospedaliera Universitaria Integrata di Verona, Verona, Italy
| | - Silvia Di Zacomo
- Department of Hematology, Blood Bank and Biotechnology, Ospedale Civile Pescara, Pescara, Italy
| | - Mosè Favarato
- UOS Molecular Diagnostics, Department of Clinical Pathology, ULSS12 Venetian, Venice, Italy
| | - Annamaria Fioroni
- UOC laboratory medicine, P.O. San Salvatore, Sulmona, L'Aquila, Italy
| | - Caterina Bolzonella
- Department of Oncology, Laboratory of Pharmacology and Molecular Biology, ULSS 18, Rovigo, Italy
| | - Giorgia Maccari
- Clinical Hematology, Department of Experimental and Clinical Medical Sciences, University of Udine, Udine, Italy
| | - Filippo Navaglia
- Department of Laboratory Medicine, University-Hospital of Padova, Padova, Italy
| | - Daniela Gatti
- Department of Haematology and BMT, Healthcare Company of South Tyrol, District of Bolzano, Bolzano, Italy
| | - Luisa Toffolatti
- Department of Pathology and Haematology, Treviso General Hospital, Treviso, Italy
| | | | - Vèronique Laloux
- QIAGEN GmbH, Hilden, Germany (Member of The European LeukemiaNet (ELN) Foundation Circle)
| | - Marco Manfrini
- Department of Experimental, Diagnostic and Specialty Medicine, Institute of Hematology 'L. and A. Seràgnoli', University of Bologna, S. Orsola-Malpighi Hospital, Bologna, Italy
| | - Piero Galieni
- Molecular Hematology Laboratory U.O.C of Hematology Hospital Mazzoni, Ascoli Piceno, Italy
| | - Barbara Giannini
- Medical Genetics Unit- Hub Laboratory AUSL Romagna, Pievesestina di Cesena, Italy
| | - Alessia Tieghi
- Imaging and Laboratory Diagnostic Department, Clinical Chemistry and Endocrinology Laboratory, Hematology Unit, Oncology and Technology Department, Hospital S. Maria Nuova, IRCCS, Reggio Emilia, Italy
| | - Sara Barulli
- Clinical Pathology Laboratory, A.O. Ospedali Riuniti Marche Nord, Pesaro, Italy
| | - Maria Luisa Serino
- Center Hemostasis and Thrombosis, Section of Medical Biochemistry, Molecular Biology and Genetics, Department of Biomedical and Specialty Surgical Sciences, University of Ferrara, Ferrara, Italy
| | - Monica Maccaferri
- Department of Medical and Surgical Sciences, Division of Hematology, University of Modena and Reggio Emilia, Modena, Italy
| | - Anna Rita Scortechini
- Clinical Hematology Laboratory, Department of Molecular and Clinical Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Nicola Giuliani
- Department of Clinical and Experimental Medicine, University of Parma, Parma, Italy
| | - Daniele Vallisa
- Clinical Pathology, Molecular Biology Laboratory, and Hematology/Bone Marrow Transplantation Unit, AUSL Piacenza, Piacenza, Italy
| | - Massimiliano Bonifacio
- Section of Clinical Biochemistry and Section of Hematology, Azienda Ospedaliera Universitaria Integrata di Verona, Verona, Italy
| | - Patrizia Accorsi
- Department of Hematology, Blood Bank and Biotechnology, Ospedale Civile Pescara, Pescara, Italy
| | - Cristina Salbe
- UOS Molecular Diagnostics, Department of Clinical Pathology, ULSS12 Venetian, Venice, Italy
| | - Vinicio Fazio
- UOC laboratory medicine, P.O. San Salvatore, Sulmona, L'Aquila, Italy
| | - Milena Gusella
- Department of Oncology, Laboratory of Pharmacology and Molecular Biology, ULSS 18, Rovigo, Italy
| | - Eleonora Toffoletti
- Clinical Hematology, Department of Experimental and Clinical Medical Sciences, University of Udine, Udine, Italy
| | - Marzia Salvucci
- Medical Genetics Unit- Hub Laboratory AUSL Romagna, Pievesestina di Cesena, Italy
| | - Mirija Svaldi
- Department of Haematology and BMT, Healthcare Company of South Tyrol, District of Bolzano, Bolzano, Italy
| | - Filippo Gherlinzoni
- Department of Pathology and Haematology, Treviso General Hospital, Treviso, Italy
| | | | | | - Giovanni Martinelli
- Department of Experimental, Diagnostic and Specialty Medicine, Institute of Hematology 'L. and A. Seràgnoli', University of Bologna, S. Orsola-Malpighi Hospital, Bologna, Italy
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Stasik S, Schuster C, Ortlepp C, Platzbecker U, Bornhäuser M, Schetelig J, Ehninger G, Folprecht G, Thiede C. An optimized targeted Next-Generation Sequencing approach for sensitive detection of single nucleotide variants. BIOMOLECULAR DETECTION AND QUANTIFICATION 2018; 15:6-12. [PMID: 29349042 PMCID: PMC5766748 DOI: 10.1016/j.bdq.2017.12.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 11/27/2017] [Accepted: 12/18/2017] [Indexed: 01/06/2023]
Abstract
NGS based detection of low-level SNVs is feasible with sensitivities up to 10−4. PCR-induced bias could be significantly reduced by the choice of adequate enzymes. The prevalent transition vs. transversion bias affects site-specific detection limits. Results from clinical data validated the feasibility of NGS-based MRD detection. Results help to select suitable biomarkers for MRD quantification.
Monitoring of minimal residual disease (MRD) has become an important clinical aspect for early relapse detection during follow-up care after cancer treatment. Still, the sensitive detection of single base pair point mutations via Next-Generation Sequencing (NGS) is hampered mainly due to high substitution error rates. We evaluated the use of NGS for the detection of low-level variants on an Ion Torrent PGM system. As a model case we used the c.1849G > T (p.Val617Phe) mutation of the JAK2-gene. Several reaction parameters (e.g. choice of DNA-polymerase) were evaluated and a comprehensive analysis of substitution errors was performed. Using optimized conditions, we reliably detected JAK2 c.1849G > T VAFs in the range of 0.01–0.0015% which, in combination with results obtained from clinical data, validated the feasibility of NGS-based MRD detection. Particularly, PCR-induced transitions (mainly G > A and C > T) were the major source of error, which could be significantly reduced by the application of proofreading enzymes. The integration of NGS results for several common point mutations in various oncogenes (i.e. IDH1 and 2, c-KIT, DNMT3A, NRAS, KRAS, BRAF) revealed that the prevalent transition vs. transversion bias (3.57:1) has an impact on site-specific detection limits of low-level mutations. These results may help to select suitable markers for MRD detection and to identify individual cut-offs for detection and quantification.
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Affiliation(s)
- S. Stasik
- Universitätsklinikum Carl Gustav Carus, Medizinische Klinik und Poliklinik I, Dresden, Germany
- National Center for Tumor Diseases (NCT), Heidelberg, Partner Site Dresden, Germany
| | | | | | - U. Platzbecker
- Universitätsklinikum Carl Gustav Carus, Medizinische Klinik und Poliklinik I, Dresden, Germany
| | - M. Bornhäuser
- Universitätsklinikum Carl Gustav Carus, Medizinische Klinik und Poliklinik I, Dresden, Germany
- National Center for Tumor Diseases (NCT), Heidelberg, Partner Site Dresden, Germany
| | - J. Schetelig
- Universitätsklinikum Carl Gustav Carus, Medizinische Klinik und Poliklinik I, Dresden, Germany
| | - G. Ehninger
- Universitätsklinikum Carl Gustav Carus, Medizinische Klinik und Poliklinik I, Dresden, Germany
| | - G. Folprecht
- Universitätsklinikum Carl Gustav Carus, Medizinische Klinik und Poliklinik I, Dresden, Germany
| | - C. Thiede
- Universitätsklinikum Carl Gustav Carus, Medizinische Klinik und Poliklinik I, Dresden, Germany
- Corresponding author: Universitätsklinikum Carl Gustav Carus, Medizinische Klinik und Poliklinik I, Fetscherstraße 74, 01307 Dresden, Germany.
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22
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Wolschke C, Badbaran A, Zabelina T, Christopeit M, Ayuk F, Triviai I, Zander A, Alchalby H, Bacher U, Fehse B, Kröger N. Impact of molecular residual disease post allografting in myelofibrosis patients. Bone Marrow Transplant 2017; 52:1526-1529. [PMID: 28714945 DOI: 10.1038/bmt.2017.157] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 03/09/2017] [Accepted: 04/29/2017] [Indexed: 01/13/2023]
Abstract
We screened 136 patients with myelofibrosis and a median age of 58 years who underwent allogeneic stem cell transplantation (AHSCT) for molecular residual disease for JAKV617F (n=101), thrombopoietin receptor gene (MPL) (n=4) or calreticulin (CALR) (n=31) mutation in peripheral blood on day +100 and +180 after AHSCT. After a median follow-up of 78 months, the 5-year estimated overall survival was 60% (95% confidence interval (CI): 50-70%) and the cumulative incidence of relapse at 5 years was 26% (95% CI: 18-34%) for the entire study population. The percentage of molecular clearance on day 100 was higher in CALR-mutated patients (92%) in comparison with MPL- (75%) and JAKV617F-mutated patients (67%). Patients with detectable mutation at day +100 or at day +180 had a significant higher risk of clinical relapse at 5 years than molecular-negative patients (62% vs 10%, P<0.001) and 70% vs 10%, P<0.001, respectively) irrespectively of the underlying mutation. In a multivariate analysis, high-risk diseases status (hazard ratio (HR) 2.5; 95% CI: 1.18-5.25, P=0.016) and detectable MRD at day 180 (HR 8.36, 95% CI: 2.76-25.30, P<0.001) were significant factors for a higher risk of relapse.
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Affiliation(s)
- C Wolschke
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - A Badbaran
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - T Zabelina
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - M Christopeit
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - F Ayuk
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - I Triviai
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - A Zander
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - H Alchalby
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - U Bacher
- Department of Hematology and Oncology, University Hospital Göttingen, Göttingen, Germany
| | - B Fehse
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - N Kröger
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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23
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Finazzi MC, Lussana F, Salmoiraghi S, Spinelli O, Rambaldi A. Detection of driver and subclonal mutations in myelofibrosis: clinical impact on pharmacologic and transplant based treatment strategies. Expert Rev Hematol 2017; 10:627-636. [PMID: 28504024 DOI: 10.1080/17474086.2017.1331125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Myelofibrosis (MF) is the most aggressive form among Philadelphia negative (Ph-) myeloproliferative neoplasms (MPNs). In the last years, the mutational landscape of MF has expanded remarkably by the identification of additional recurrent mutations, called subclonal mutations. Areas covered: Here we describe the available data about the currently identified subclonal mutations and their prognostic value in MF patients. We also review the practical value of including such molecular information in available prognostic models for both outcome prediction and possibly treatment decision with regards to transplant indication. Lastly, we covered the available data on the application of molecular markers for minimal residual disease (MRD) monitoring after transplantation. Expert commentary: The demonstration of the prognostic value of additional mutations suggests to define this molecular profile at diagnosis and when an allogeneic transplant can be advised, particularly in younger patients. The presence of molecular markers might offer the possibility to evaluate the depth of remission and to monitor MRD after transplantation. Prospective clinical studies are needed to validate the use of this molecular data in the routine clinical practice.
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Affiliation(s)
- Maria Chiara Finazzi
- a Hematology and Bone Marrow Transplant Unit, Azienda Socio Sanitaria Territoriale Papa Giovanni XXIII , Bergamo , Italy
| | - Federico Lussana
- a Hematology and Bone Marrow Transplant Unit, Azienda Socio Sanitaria Territoriale Papa Giovanni XXIII , Bergamo , Italy
| | - Silvia Salmoiraghi
- a Hematology and Bone Marrow Transplant Unit, Azienda Socio Sanitaria Territoriale Papa Giovanni XXIII , Bergamo , Italy
| | - Orietta Spinelli
- a Hematology and Bone Marrow Transplant Unit, Azienda Socio Sanitaria Territoriale Papa Giovanni XXIII , Bergamo , Italy
| | - Alessandro Rambaldi
- a Hematology and Bone Marrow Transplant Unit, Azienda Socio Sanitaria Territoriale Papa Giovanni XXIII , Bergamo , Italy.,b Department of Oncology and Hematology , Università degli Studi di Milano , Milan , Italy
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Zhang LN, Chen X, Feng SZ. [Advances in allogeneic hematopoietic stem cell transplantation for myelofibrosis]. ZHONGHUA XUE YE XUE ZA ZHI = ZHONGHUA XUEYEXUE ZAZHI 2017; 38:352-356. [PMID: 28468103 PMCID: PMC7342713 DOI: 10.3760/cma.j.issn.0253-2727.2017.04.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Indexed: 11/09/2022]
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25
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Xia D, Hasserjian RP. Molecular testing for JAK2, MPL, and CALR in myeloproliferative neoplasms. Am J Hematol 2016; 91:1277-1280. [PMID: 27727468 DOI: 10.1002/ajh.24578] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Revised: 10/05/2016] [Accepted: 10/06/2016] [Indexed: 01/02/2023]
Abstract
Polycythemia vera (PV), essential thrombocythemia (ET), and primary myelofibrosis (PMF) are myeloproliferative neoplasms characterized by recurrent somatic mutations in JAK2, CALR, and MPL. This short review addresses (1) the spectrum of mutations seen in PV, ET, and PMF, (2) the emerging genotype-phenotype correlations, (3) the current role of molecular testing in disease classification and management, and (4) several important considerations for selecting an appropriate molecular test. In our view, sequential testing algorithms and simultaneous assessment of multiple mutations by next-generation sequencing are both valid approaches to testing. Am. J. Hematol. 91:1277-1280, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Daniel Xia
- Department of PathologyMassachusetts General HospitalBoston Massachusetts
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26
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Lin CY, Ho CM, Tamamyan G, Yang SF, Peng CT, Chang JG. Validating the Sensitivity of High-Resolution Melting Analysis for JAK2 V617F Mutation in the Clinical Setting. J Clin Lab Anal 2016; 30:838-844. [PMID: 27169616 DOI: 10.1002/jcla.21945] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 01/05/2016] [Accepted: 01/13/2016] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Janus kinase 2 (JAK2) plays an important role in normal hematopoietic growth factor signaling. The detection of the JAK2 V617F mutation (c.1849GNT, GTC → TTC) is crucial for the diagnosis of myeloproliferative neoplasm (MPN) and has become the essential criteria for diagnosis of MPN by the WHO. High-resolution melt (HRM) curve analysis is a nongel-based, closed-tube method, in which PCR amplification and subsequent analysis are sequentially performed in the well, making it more convenient than other scanning methodologies. METHODS We evaluated JAK2 V617F mutation by HRM. Twenty-nine patients diagnosed with MPN were examined. We studied the analytical sensitivity of the HRM analysis using real-time polymerase chain reaction (PCR) for identifying the JAK2 V617F mutation. Additionally, the sensitivity of HRM analysis and allele-specific PCR (AS-PCR) assay was compared. RESULTS The JAK2 V617F mutation was successfully discriminated at an abundance of 6% or above in HRM analysis. Both HRM analysis and AS-PCR showed 100% accuracy with detection limits of 6% and 2.5%, respectively. CONCLUSION HRM analysis is a fast, simple, reliable, and nonexpensive method for the detection of the JAK2 V617F mutation. However, more validation of the detection limits of HRM analysis should be performed before declaration of the analytic sensitivity of the method.
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Affiliation(s)
- Chien-Yu Lin
- Graduate Institute of Clinical Medical Sciences, China Medical University, Taichung, Taiwan.,Department of Laboratory Medicine, China Medical University Hospital, Taichung, Taiwan.,Epigenome Research Center, China Medical University Hospital, Taichung, Taiwan
| | - Cheng-Mao Ho
- Department of Laboratory Medicine, China Medical University Hospital, Taichung, Taiwan.,Department of Nursing, Hungkuang University, Taichung, Taiwan
| | - Gevorg Tamamyan
- Department of Pediatric Hemato/Oncology, Complex Clinic of Chemotherapy, Yerevan State Medical University "Muratsan" Hospital, Yerevan, Armenia
| | - Shu-Fen Yang
- Department of Laboratory Medicine, China Medical University Hospital, Taichung, Taiwan.,Epigenome Research Center, China Medical University Hospital, Taichung, Taiwan
| | - Ching-Tien Peng
- Division of Pediatric Hemato/Oncology, China Medical University Children's Hospital, Taichung, Taiwan. .,Department of Biotechnology, Asia University, Taichung, Taiwan.
| | - Jan-Gowth Chang
- Department of Laboratory Medicine, China Medical University Hospital, Taichung, Taiwan. .,Epigenome Research Center, China Medical University Hospital, Taichung, Taiwan. .,College of Medicine, China Medical University, Taichung, Taiwan.
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Monitoring Minimal Residual Disease in the Myeloproliferative Neoplasms: Current Applications and Emerging Approaches. BIOMED RESEARCH INTERNATIONAL 2016; 2016:7241591. [PMID: 27840830 PMCID: PMC5093244 DOI: 10.1155/2016/7241591] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 10/05/2016] [Indexed: 11/18/2022]
Abstract
The presence of acquired mutations within the JAK2, CALR, and MPL genes in the majority of patients with myeloproliferative neoplasms (MPN) affords the opportunity to utilise these mutations as markers of minimal residual disease (MRD). Reduction of the mutated allele burden has been reported in response to a number of therapeutic modalities including interferon, JAK inhibitors, and allogeneic stem cell transplantation; novel therapies in development will also require assessment of efficacy. Real-time quantitative PCR has been widely adopted for recurrent point mutations with assays demonstrating the specificity, sensitivity, and reproducibility required for clinical utility. More recently, approaches such as digital PCR have demonstrated comparable, if not improved, assay characteristics and are likely to play an increasing role in MRD monitoring. While next-generation sequencing is increasingly valuable as a tool for diagnosis of MPN, its role in the assessment of MRD requires further evaluation.
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28
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Is Low Positive JAK2 V617F Mutation Test Result Clinically Significant?: Multi-Institutional Study. Appl Immunohistochem Mol Morphol 2016; 24:589-94. [DOI: 10.1097/pai.0000000000000228] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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29
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Christopeit M, Badbaran A, Alawi M, Zabelina T, Zeck G, Wolschke C, Ayuk F, Kröger N. Correlation of somatic mutations with outcome after FLAMSA-busulfan sequential conditioning and allogeneic stem cell transplantation in patients with myelodysplastic syndromes. Eur J Haematol 2016; 97:288-96. [PMID: 26680262 DOI: 10.1111/ejh.12724] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/15/2015] [Indexed: 01/08/2023]
Abstract
Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is a curative treatment option for myelodysplastic syndromes (MDS). Little is known about the prognostic impact of mutations, for example, in TP53 specifically after allo-HSCT. We here describe the prognostic impact of mutations in a panel of 19 genes analyzed by amplicon-based next-generation-sequencing in a uniformly treated patient cohort. Sixty-two patients with a median age of 61 yr suffered from MDS with 0-20% bone marrow blasts. International Prognostic Score was intermediate 1 (15%) and higher (79%). Conditioning uniformly was performed using a sequential approach in which FLAMSA chemotherapy was followed by Busulfan-based conditioning. Patients mostly were transplanted from an unrelated donor (77%), and 36% of patients received a graft from a mismatched donor. Median number of mutations was 2 (range 0-6). RUNX1, GATA2, TET2, and CEBPA were the genes most frequently found mutated. TP53, a factor previously reported to confer adverse prognostic impact after allogeneic stem cell transplantation, was mutated in samples from eight patients, one of which showed a silent mutation. With an estimated 5-yr overall/disease-free survival of 48 ± 7%/41 ± 7%, none of the mutations analyzed showed a prognostic impact in this analysis of the largest uniformly treated cohort thus far. This especially holds true for patients with a mutation in TP53.
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Affiliation(s)
- Maximilian Christopeit
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Anita Badbaran
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Malik Alawi
- Bioinformatics Service Facility, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Tatjana Zabelina
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Gaby Zeck
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Christine Wolschke
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Francis Ayuk
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Nicolaus Kröger
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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30
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Mansier O, Migeon M, Saint-Lézer A, James C, Verger E, Robin M, Socié G, Bidet A, Mahon FX, Cassinat B, Lippert E. Quantification of the Mutant CALR Allelic Burden by Digital PCR. J Mol Diagn 2016; 18:68-74. [DOI: 10.1016/j.jmoldx.2015.07.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 07/07/2015] [Accepted: 07/22/2015] [Indexed: 01/07/2023] Open
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31
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Evading Capture by Residual Disease Monitoring: Extramedullary Manifestation of JAK2 V617F-Positive Primary Myelofibrosis After Allogeneic Stem Cell Transplantation. Case Rep Hematol 2015; 2015:703457. [PMID: 26346984 PMCID: PMC4546746 DOI: 10.1155/2015/703457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 07/17/2015] [Accepted: 07/22/2015] [Indexed: 01/23/2023] Open
Abstract
Monitoring of the JAK2 V617F allele burden in myeloproliferative neoplasms after allogeneic stem cell transplantation is useful to determine levels of residual disease and has the potential to detect early relapse and guide subsequent clinical intervention. A case is described of a JAK2 V617F-positive primary myelofibrosis patient who underwent allogeneic stem cell transplantation. Prospective residual disease monitoring of the peripheral blood failed to detect an extramedullary manifestation of the disease, a periorbital myeloid sarcoma, arising nearly three years after transplant. This case serves to highlight a pitfall in residual disease monitoring for myeloproliferative neoplasm-associated mutations in the post-allogeneic stem cell transplantation setting.
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Allogeneic haematopoietic stem cell transplantation for primary myelofibrosis and myelofibrosis evolved from other myeloproliferative neoplasms. Curr Opin Hematol 2015; 22:184-90. [DOI: 10.1097/moh.0000000000000121] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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33
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Triviai I, Stübig T, Niebuhr B, Hussein K, Tsiftsoglou A, Fehse B, Stocking C, Kröger N. CD133 marks a stem cell population that drives human primary myelofibrosis. Haematologica 2015; 100:768-79. [PMID: 25724578 DOI: 10.3324/haematol.2014.118463] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Accepted: 02/26/2015] [Indexed: 01/01/2023] Open
Abstract
Primary myelofibrosis is a myeloproliferative neoplasm characterized by bone marrow fibrosis, megakaryocyte atypia, extramedullary hematopoiesis, and transformation to acute myeloid leukemia. To date the stem cell that undergoes the spatial and temporal chain of events during the development of this disease has not been identified. Here we describe a CD133(+) stem cell population that drives the pathogenesis of primary myelofibrosis. Patient-derived circulating CD133(+) but not CD34(+)CD133(-) cells, with a variable burden for JAK2 (V617F) mutation, had multipotent cloning capacity in vitro. CD133(+) cells engrafted for up to 10 months in immunocompromised mice and differentiated into JAK2-V617F(+) myeloid but not lymphoid progenitors. We observed the persistence of human, atypical JAK2-V617F(+) megakaryocytes, the initiation of a prefibrotic state, bone marrow/splenic fibrosis and transition to acute myeloid leukemia. Leukemic cells arose from a subset of CD133(+) cells harboring EZH2 (D265H) but lacking a secondary JAK2 (V617F) mutation, consistent with the hypothesis that deregulation of EZH2 activity drives clonal growth and increases the risk of acute myeloid leukemia. This is the first characterization of a patient-derived stem cell population that drives disease resembling both chronic and acute phases of primary myelofibrosis in mice. These results reveal the importance of the CD133 antigen in deciphering the neoplastic clone in primary myelofibrosis and indicate a new therapeutic target for myeloproliferative neoplasms.
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Affiliation(s)
- Ioanna Triviai
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Germany Heinrich-Pette-Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany Department of Pharmaceutical Sciences, Aristotle University of Thessaloniki, Greece
| | - Thomas Stübig
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Germany
| | - Birte Niebuhr
- Heinrich-Pette-Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Kais Hussein
- Institute of Pathology, Hannover Medical School, Germany
| | - Asterios Tsiftsoglou
- Department of Pharmaceutical Sciences, Aristotle University of Thessaloniki, Greece
| | - Boris Fehse
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Germany
| | - Carol Stocking
- Heinrich-Pette-Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Nicolaus Kröger
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Germany
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Yonal-Hindilerden I, Daglar-Aday A, Akadam-Teker B, Yilmaz C, Nalcaci M, Yavuz AS, Sargin D. The Burden of JAK2V617F Mutated Allele in Turkish Patients With Myeloproliferative Neoplasms. J Clin Med Res 2015; 7:161-70. [PMID: 25584101 PMCID: PMC4285062 DOI: 10.14740/jocmr2047w] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/08/2014] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND Studies regarding the impact of JAK2V617F allele burden on phenotypic properties and clinical course in Philadelphia-negative myeloproliferative neoplasms (Ph-negative MPNs) have reported variable results. We aimed to analyze the association of mutated JAK2V617F allele burden with laboratory characteristics and clinical phenotype in Turkish patients (107 essential thrombocythemia (ET) and 77 primary myelofibrosis (PMF)). METHODS Peripheral blood samples of 184 patients with Ph-negative MPNs were analyzed for JAK2V617F allele status and burden. JAK2 MutaScreen assay (Ipsogen, Luminy Biotech, Marseille, France) was used to detect the JAK2V617F status and quantitative JAK2V617F allele burdens in genomic DNA using TaqMan allelic discrimination. RESULTS Frequency of JAK2V617F-positive patients with high mutation load (allele burden > 50%) was higher in PMF compared to ET (23.4% and 4.7%, respectively; P = 0.001). We found significant association between ET patients with high JAK2V617F allele burden and lower hemoglobin (Hgb) and hematocrit (Hct), higher LDH levels and more prevalent massive splenomegaly (P = 0.001, P = 0.001, P = 0.012 and P = 0.015, respectively). ET patients with high mutation load displayed higher prevalence of bleeding compared to low mutation load and wild-type mutational status (P = 0.003). Rate of DVT was significantly higher in ET patients with mutant allele burden in upper half compared to lower half and wild-type (P = 0.029). We observed significant association between PMF patients with high JAK2V617F allele burden and higher Hgb, Hct levels and leukocyte counts (P = 0.003, P = 0.021 and P = 0.001, respectively). CONCLUSIONS Our study demonstrated JAK2V617F allele burden correlates with clinical features in ET and PMF. We conclude quantification of JAK2V617F mutation contributes to the workup of Ph-negative MPNs.
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Affiliation(s)
- Ipek Yonal-Hindilerden
- Division of Hematology, Department of Internal Medicine, Istanbul University Istanbul Medical Faculty, Fatih, Istanbul, Turkey
| | - Aynur Daglar-Aday
- Division of Hematology, Department of Internal Medicine, Istanbul University Istanbul Medical Faculty, Fatih, Istanbul, Turkey
| | - Basak Akadam-Teker
- Division of Hematology, Department of Internal Medicine, Istanbul University Istanbul Medical Faculty, Fatih, Istanbul, Turkey
| | - Ceylan Yilmaz
- Division of Hematology, Department of Internal Medicine, Istanbul University Istanbul Medical Faculty, Fatih, Istanbul, Turkey
| | - Meliha Nalcaci
- Division of Hematology, Department of Internal Medicine, Istanbul University Istanbul Medical Faculty, Fatih, Istanbul, Turkey
| | - Akif Selim Yavuz
- Division of Hematology, Department of Internal Medicine, Istanbul University Istanbul Medical Faculty, Fatih, Istanbul, Turkey
| | - Deniz Sargin
- Division of Hematology, Department of Internal Medicine, Istanbul University Istanbul Medical Faculty, Fatih, Istanbul, Turkey
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Chen CC, Gau JP, Chou HJ, You JY, Huang CE, Chen YY, Lung J, Chou YS, Leu YW, Lu CH, Lee KD, Tsai YH. Frequencies, clinical characteristics, and outcome of somatic CALR mutations in JAK2-unmutated essential thrombocythemia. Ann Hematol 2015; 93:2029-36. [PMID: 25015052 DOI: 10.1007/s00277-014-2151-8] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Accepted: 06/23/2014] [Indexed: 01/16/2023]
Abstract
Calreticulin (CALR) mutations were recently identified in patients with essential thrombocythemia (ET) and primary myelofibrosis (PMF) devoid of JAK2 and MPL mutations. We evaluated the clinical, laboratory, and molecular features of a Taiwanese population of patients with ET. Among 147 ET patients, CALR mutations were detected in 33 (22.5 %), JAK2V617F in 94 (63.9 %), and MPL mutations in 4 (2.7 %). Sixteen (10.9 %) patients were negative for all three mutations (CALR, JAK2V617F, and MPL; triple negative). Interestingly, one patient with the type 2 CALR mutation also harbored a low allele burden (0.025 %) of JAK2V617F mutation. Furthermore, we found a novel CALR mutation, with the resultant protein sharing an identical amino acid sequence to the type 6 CALR mutant. Compared to those with JAK2 mutation, CALR-mutated ET patients were characterized by younger age, lower leukocyte count, higher platelet count, and decreased risk of thrombosis. CALR mutations had a favorable impact on thrombosis-free survival (TFS) for ET patients, whereas the respective TFS outcomes were similarly poorer in JAK2-mutated ET and PV patients. Multivariate analysis confirmed that younger age (<60 years), presence of CALR mutations, and a lower platelet count (<1,000 × 10(9)/L) were independently associated with a longer TFS in ET patients. The current study demonstrates that CALR mutations characterize a special group of ET patients with unique phenotypes that are not discrepant from those seen in Western countries.
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Shanavas M, Gupta V. Controversies and dilemmas in allogeneic transplantation for myelofibrosis. Best Pract Res Clin Haematol 2014; 27:165-74. [PMID: 25189727 DOI: 10.1016/j.beha.2014.07.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Accepted: 07/11/2014] [Indexed: 01/10/2023]
Abstract
JAK1/2 inhibitors have broadened the therapeutic options in myelofibrosis. Though not curative, they result in a meaningful clinical benefit with relatively fewer side effects. In contrast, allogeneic hematopoietic cell transplantation (HCT) is a potentially curative option, but is associated with significant morbidity and mortality. Hence, an important question is the optimal timing of HCT in the era of JAK inhibitors. Timing of HCT is a crucial decision, and need to be individualized based on the personal preferences and goals of therapy; in addition to patient, disease, and transplant related factors. Risk stratification by the currently established prognostic scoring systems need to be further refined by incorporation of prognostically significant mutations to guide the treatment choices better. Data on use of JAK inhibitors prior to HCT have just started to emerge. We discuss some of the current controversies and dilemmas in transplantation for myelofibrosis based on a few real life scenarios.
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Affiliation(s)
- Mohamed Shanavas
- Allogeneic Blood and Marrow Transplant Program, Princess Margaret Cancer Center and University of Toronto, 610 University Avenue, Toronto, Ontario, M5G 2M9, Canada
| | - Vikas Gupta
- Allogeneic Blood and Marrow Transplant Program, Princess Margaret Cancer Center and University of Toronto, 610 University Avenue, Toronto, Ontario, M5G 2M9, Canada.
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Adekola K, Popat U, Ciurea SO. An update on allogeneic hematopoietic progenitor cell transplantation for myeloproliferative neoplasms in the era of tyrosine kinase inhibitors. Bone Marrow Transplant 2014; 49:1352-9. [PMID: 25089599 DOI: 10.1038/bmt.2014.176] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Accepted: 04/24/2014] [Indexed: 01/10/2023]
Abstract
Myeloproliferative neoplasms are a category of diseases that have been traditionally amenable to allogeneic hematopoietic progenitor cell transplantation. Current developments in drug therapy have delayed transplantation for more advanced phases of the disease, especially for patients with CML, whereas transplantation remains a mainstream treatment modality for patients with advanced myelofibrosis and chronic myelomonocytic leukemia. Reduced-intensity conditioning has decreased the treatment-related mortality, and advances in the use of alternative donors for transplantation could extend the use of this procedure to an increasing number of patients with improved safety and efficacy. Here we review the current knowledge about allogeneic transplantation for myeloproliferative neoplasms and discuss the most important aspects to be considered when contemplating transplantation for patients with these diseases. Janus kinase 2 inhibitors offer the promise to improve spleen size and performance of patients with myelofibrosis and extend transplantation for patients with more advanced disease.
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Affiliation(s)
- K Adekola
- Department of Stem Cell Transplantation and Cellular Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - U Popat
- Department of Stem Cell Transplantation and Cellular Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - S O Ciurea
- Department of Stem Cell Transplantation and Cellular Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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38
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Mascarenhas J. Rationale for combination therapy in myelofibrosis. Best Pract Res Clin Haematol 2014; 27:197-208. [PMID: 25189730 DOI: 10.1016/j.beha.2014.07.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2014] [Accepted: 07/11/2014] [Indexed: 12/18/2022]
Abstract
Agents targeting the JAK-STAT pathway have dominated the investigational therapeutic portfolio over the last five years resulting in the first and only approved agent for the treatment of patients with myelofibrosis (MF). However, chromatin modifying agents, anti-fibrosing agents, and other signaling pathway inhibitors have also demonstrated activity and offer the potential to improve upon the clinical success of JAK2 inhibition. Due to the complex pathobiological mechanisms underlying MF, it is likely that a combination of biologically active therapies will be required to target the MF hematopoietic stem cell in order to achieve significant disease course modification. Ruxolitinib in partnership with panobinostat, decitabine, and LDE225 are being evaluated in current combination therapy trials based on pre-clinical studies that provide strong scientific rationale. The rationale of combination of danazol or lenalidomide with ruxolitinib is mainly based on mitigation of anti-JAK2-mediated myelosuppression. Combination trials of ruxolitinib and novel anti-fibrosing agents such as PRM-151 represent an attempt to address therapeutic limitations of JAK2 inhibitors such as reversal of bone marrow fibrosis. Ruxolitinib is also being incorporated in novel treatment strategies in the setting of hematopoietic stem cell transplantation for MF. As the pathogenetic mechanisms are better understood, potential drug combinations in MF will increase dramatically and demonstration of biologic activity in effective preclinical models will be required to efficiently evaluate the most active combinations with least toxicity in future trials. This manuscript will address the proposed goals of combination therapy approach and review the state of the art in combination experimental therapy for MF.
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Affiliation(s)
- John Mascarenhas
- Myeloproliferative Disorder Program, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, One Gustave L Levy Place, Box 1079, New York, NY, USA.
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Allogeneic hematopoietic cell transplantation for myelofibrosis using fludarabine-, intravenous busulfan- and low-dose TBI-based conditioning. Bone Marrow Transplant 2014; 49:1162-9. [PMID: 24978138 DOI: 10.1038/bmt.2014.131] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 05/08/2014] [Accepted: 05/12/2014] [Indexed: 12/31/2022]
Abstract
Graft failure is one of the major barriers to the success of allogeneic hematopoietic cell transplantation (HCT) in myelofibrosis (MF). We report our institutional experience with 27 MF patients who underwent HCT using fludarabine-, intravenous BU- and low-dose total body irradiation (FBT)-based reduced-intensity (n=20) or full-intensity (n=7) conditioning regimens. Eight patients had prior exposure to JAK1/2 inhibitor therapy; six patients received JAK1/2 inhibitors leading on to HCT and two patients received transplant at the failure of JAK1/2 inhibitor therapy. No adverse impact of JAK1/2 inhibitor therapy was observed on early post-transplant outcomes. All evaluable patients had neutrophil recovery, and no primary graft failure was observed. Cumulative incidence of grades II-IV acute GVHD at day 100 was 48% (95% confidence interval (CI), 29-67%) and chronic GVHD at 2 years was 66% (95% CI, 49-84%). Cumulative incidences of nonrelapse mortality (NRM), relapse and probability of OS at 2 years were: 43% (95% CI, 12-74%), 10% (95% CI, 0-39%) and 56% (95% CI, 28-77%), respectively. FBT-based conditioning regimen has a favorable impact on engraftment; however, further efforts are required to reduce NRM.
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Kröger N, Zabelina T, Alchalby H, Stübig T, Wolschke C, Ayuk F, von Hünerbein N, Kvasnicka HM, Thiele J, Kreipe HH, Büsche G. Dynamic of Bone Marrow Fibrosis Regression Predicts Survival after Allogeneic Stem Cell Transplantation for Myelofibrosis. Biol Blood Marrow Transplant 2014; 20:812-5. [DOI: 10.1016/j.bbmt.2014.02.019] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Accepted: 02/21/2014] [Indexed: 11/26/2022]
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Vannucchi AM, Guglielmelli P, Pieri L, Antonioli E, Bosi A. Treatment options for essential thrombocythemia and polycythemia vera. Expert Rev Hematol 2014; 2:41-55. [DOI: 10.1586/17474086.2.1.41] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Patnaik MM, Tefferi A. Molecular diagnosis of myeloproliferative neoplasms. Expert Rev Mol Diagn 2014; 9:481-92. [DOI: 10.1586/erm.09.29] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Alshemmari SH, Rajaan R, Ameen R, Al-Drees MA, Almosailleakh MR. JAK2V617F allele burden in patients with myeloproliferative neoplasms. Ann Hematol 2013; 93:791-6. [PMID: 24362471 DOI: 10.1007/s00277-013-1988-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Accepted: 12/02/2013] [Indexed: 02/02/2023]
Abstract
Myeloproliferative neoplasms (MPNs) are clonal malignant diseases that represent a group of conditions including polycythemia vera (PV), essential thrombocythemia (ET), and myelofibrosis (MF). The JAK2-V617F mutation is prevalent in almost all patients with MPNs and has become a valuable biomarker for diagnosis of MPNs. A different allele burden in these entities has long been noticed. The aim of our study was to assess the JAK2 allele burden in our JAK2V617F positive cases and its association with phenotype if any and to select a simple, sensitive assay for use in our clinical molecular diagnostic laboratory. Methodologies reported in this literature include amplification refractory mutation system-polymerase chain reaction (ARMS-PCR) and real-time quantitative polymerase chain reaction (RQ-PCR). We analyzed 174 cases by RQ-PCR for the quantification of JAK2V617F were initially screened by ARMS-PCR. We found that V617F allele burden in the entire population of patients was 73 % ranging from 0.97 to 95 %. The median V617F allele burden in PV patients was 40 %, MF was 95 %, and ET was 25 %. ARMS-PCR and RQ-PCR were proven to be sensitive since ARMS-PCR is a qualitative method; it can be used to screen JAK2V617F mutation and RQ-PCR was used to quantify the V617F cells. Our study suggests that JAK2V617F positivity is associated with MPNs, and its allele burden is an excellent diagnostic marker for disease subtypes, prognosis, disease phenotype and complication, and evolution. The data indicates that ARMS-PCR is simple and can be easily performed for the primary screening of JAK2V617F mutation, and RQ-PCR is sensitive enough to detect low mutant allele levels (>10 %), specific enough not to produce false positive results, and can be performed for the JAK2V617F allele burden quantification.
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Affiliation(s)
- Salem H Alshemmari
- Department of Medicine, Faculty of Medicine, Kuwait University, Safat, Kuwait, P.O. BOX 24923-13110, Kuwait, Kuwait,
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Polyploidy in myelofibrosis: analysis by cytogenetic and SNP array indicates association with advancing disease. Mol Cytogenet 2013; 6:59. [PMID: 24341401 PMCID: PMC3906908 DOI: 10.1186/1755-8166-6-59] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Accepted: 11/25/2013] [Indexed: 11/10/2022] Open
Abstract
Background Myelofibrosis occurs as primary myelofibrosis or as a late occurrence in the evolution of essential thrombocythaemia and polycythaemia vera. It is the rarest of the three classic myeloproliferative neoplasms (MPN). Polyploidy has only rarely been reported in MPN despite the prominent involvement of abnormal megakaryocytes. The use of peripheral blood samples containing increased numbers of haematopoietic progenitors has improved the output from cytogenetic studies in myelofibrosis and together with the use of single nucleotide polymorphism arrays (SNPa) has contributed to an improved knowledge regarding the diverse genetic landscape of this rare disease. Results Cytogenetic studies performed on a consecutive cohort of 42 patients with primary or post ET/PV myelofibrosis showed an abnormal karyotype in 24 cases and of these, nine showed a polyploid clone. Six of the nine cases showed a tetraploid (4n) subclone, whereas three showed mixed polyploid subclones with both tetraploid and octoploid (4n/8n) cell lines. The abnormal clone evolved from a near diploid karyotype at the initial investigation to a tetraploid karyotype in follow-up cytogenetic analysis in four cases. In total, six of the nine polyploid cases showed gain of 1q material. The remaining three cases showed polyploid metaphases, but with no detectable structural karyotypic rearrangements. Three of the nine cases showed chromosome abnormalities of 6p, either at diagnosis or later acquired. SNPa analysis on eight polyploid cases showed additional changes not previously recognised by karyotype analysis alone, including recurring changes involving 9p, 14q, 17q and 22q. Except for gain of 1q, SNPa findings from the polyploid group compared to eight non-polyploid cases with myelofibrosis found no significant differences in the type of abnormality detected. Conclusions The study showed the use of peripheral blood samples to be suitable for standard karyotyping evaluation and DNA based studies. The overall profile of abnormalities found were comparable with that of post-MPN acute myeloid leukaemia or secondary myelodysplastic syndrome and cases in the polyploidy group were associated with features of high risk disease. The above represents the first documented series of polyploid karyotypes in myelofibrosis and shows a high representation of gain of 1q.
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Fu Y, Schroeder T, Zabelina T, Badbaran A, Bacher U, Kobbe G, Ayuk F, Wolschke C, Schnittger S, Kohlmann A, Haferlach T, Kröger N. Postallogeneic monitoring with molecular markers detected by pretransplant next-generation or Sanger sequencing predicts clinical relapse in patients with myelodysplastic/myeloproliferative neoplasms. Eur J Haematol 2013; 92:189-94. [PMID: 24164563 DOI: 10.1111/ejh.12223] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/20/2013] [Indexed: 12/17/2022]
Abstract
Relapse is the major cause of treatment failure after allogeneic stem-cell transplantation (AHSCT) for patients with myelodysplastic syndrome/myeloproliferative syndrome neoplasms (MDS/MPN). We evaluated the impact of molecular mutations on outcome and the value of molecular monitoring post-transplantation. We screened 45 patients with chronic myelomonocytic leukemia (n = 39 patients, including seven with transformed-acute myeloid leukemia), MDS/MPN unclassifiable (n = 5), and atypical BCR-ABL1-negative CML (n = 1) for mutations in ASXL1, CBL, NRAS, and TET2 genes by molecular genetics including a sensitive next-generation sequencing (NGS) technique. In 36 patients, sufficient DNA was available for molecular analyses. In particular, TET2 and CBL mutations were screened applying amplicon deep sequencing. In 89% of cases, at least one mutation could be detected: ASXL1: n = 18 (50%); CBL: n = 7 (19%); TET2: n = 15 (42%); and NRAS: n = 11 (32%). Survival after AHSCT at 5 yr was 46% (95% CI 28-64%) and was not influenced by any mutation. After a median of 6 months after AHSCT in 33% of the patients, one of the molecular markers was still detectable, resulting in a higher incidence of relapse than in patients with undetectable mutations (50% vs. 15%, P = 0.04). In conclusion, pretransplant molecular mutation analysis can help to detect biomarkers in patients with MPN/MDS, which may be subsequently used as minimal residual disease markers after AHSCT.
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Affiliation(s)
- Yuewen Fu
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Laboratory Practice Guidelines for Detecting and Reporting JAK2 and MPL Mutations in Myeloproliferative Neoplasms. J Mol Diagn 2013; 15:733-44. [DOI: 10.1016/j.jmoldx.2013.07.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Revised: 07/01/2013] [Accepted: 07/12/2013] [Indexed: 12/11/2022] Open
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JAK2 p.V617F detection and allele burden measurement in peripheral blood and bone marrow aspirates in patients with myeloproliferative neoplasms. Blood 2013; 122:3784-6. [PMID: 24068492 DOI: 10.1182/blood-2013-07-515676] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Detection of the JAK2 p.V617F mutation and measurement of its allele burden can be performed using both peripheral blood (PB) and bone marrow (BM) samples from patients with myeloproliferative neoplasms (MPNs). However, the diagnostic accuracy of detecting the JAK2 p.V617F mutation and quantifying its allele burden in PB and BM samples has not been systematically compared. We retrospectively analyzed 388 patients with MPN who had been tested for JAK2 p.V617F allele burden using both PB and BM samples within 3 months of each other. The sensitivity and specificity of detecting JAK2 p.V617F in PB when compared with BM were both 100%. Furthermore, the JAK2 p.V617F allele burden measured in PB and BM were equivalent by linear regression analysis (R(2) = 0.991; P < .0001). We therefore conclude that PB is a reliable source for testing for the JAK2 p.V617F mutation and quantifying its allele burden in patients with MPN.
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Establishing optimal quantitative-polymerase chain reaction assays for routine diagnosis and tracking of minimal residual disease in JAK2-V617F-associated myeloproliferative neoplasms: a joint European LeukemiaNet/MPN&MPNr-EuroNet (COST action BM0902) study. Leukemia 2013; 27:2032-9. [PMID: 23860450 PMCID: PMC3806250 DOI: 10.1038/leu.2013.219] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Revised: 06/30/2013] [Accepted: 07/02/2013] [Indexed: 02/06/2023]
Abstract
Reliable detection of JAK2-V617F is critical for accurate diagnosis of myeloproliferative neoplasms (MPNs); in addition, sensitive mutation-specific assays can be applied to monitor disease response. However, there has been no consistent approach to JAK2-V617F detection, with assays varying markedly in performance, affecting clinical utility. Therefore, we established a network of 12 laboratories from seven countries to systematically evaluate nine different DNA-based quantitative PCR (qPCR) assays, including those in widespread clinical use. Seven quality control rounds involving over 21 500 qPCR reactions were undertaken using centrally distributed cell line dilutions and plasmid controls. The two best-performing assays were tested on normal blood samples (n=100) to evaluate assay specificity, followed by analysis of serial samples from 28 patients transplanted for JAK2-V617F-positive disease. The most sensitive assay, which performed consistently across a range of qPCR platforms, predicted outcome following transplant, with the mutant allele detected a median of 22 weeks (range 6–85 weeks) before relapse. Four of seven patients achieved molecular remission following donor lymphocyte infusion, indicative of a graft vs MPN effect. This study has established a robust, reliable assay for sensitive JAK2-V617F detection, suitable for assessing response in clinical trials, predicting outcome and guiding management of patients undergoing allogeneic transplant.
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Abstract
PURPOSE OF REVIEW A succinct yet comprehensive review of the biology of myeloproliferative neoplasms and therapeutic options with a focus on rational decision making for hematopoietic stem cell transplantation. RECENT FINDINGS The introduction of Janus kinase inhibitors for myelofibrosis have ushered in a new era for treatment of constitutional symptoms and splenomegaly in myelofibrosis, but the effect of these agents on the natural history of the disease has yet to be clearly defined. Reduced intensity transplants have emerged as the preferred option with recent evidence suggesting fludarabine and melphalan as the optimal conditioning regimen. SUMMARY Myelofibrosis is a rare hematologic malignancy with limited curative therapeutic options. Significant advances in our understanding of disease pathogenesis have led to new targets and new therapeutic options are forthcoming. Hematopoietic stem cell transplantation is at present the only treatment with curative intent; however, the selection of patients who are likely to be best served by this procedure is difficult. As myelofibrosis is an extremely rare disease, randomized clinical trials specifically investigating the role of transplantation in myelofibrosis are unlikely to occur, thus current decision making processes are best guided by retrospective analyses from registry databases and single institution experiences.
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Zapparoli GV, Jorissen RN, Hewitt CA, McBean M, Westerman DA, Dobrovic A. Quantitative threefold allele-specific PCR (QuanTAS-PCR) for highly sensitive JAK2 V617F mutant allele detection. BMC Cancer 2013; 13:206. [PMID: 23617802 PMCID: PMC3658971 DOI: 10.1186/1471-2407-13-206] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Accepted: 03/26/2013] [Indexed: 02/03/2023] Open
Abstract
Background The JAK2 V617F mutation is the most frequent somatic change in myeloproliferative neoplasms, making it an important tumour-specific marker for diagnostic purposes and for the detection of minimal residual disease. Sensitive quantitative assays are required for both applications, particularly for the monitoring of minimal residual disease, which requires not only high sensitivity but also very high specificity. Methods We developed a highly sensitive probe-free quantitative mutant-allele detection method, Quantitative Threefold Allele-Specific PCR (QuanTAS-PCR), that is performed in a closed-tube system, thus eliminating the manipulation of PCR products. QuantTAS-PCR uses a threefold approach to ensure allele-specific amplification of the mutant sequence: (i) a mutant allele-specific primer, (ii) a 3′dideoxy blocker to suppress false-positive amplification from the wild-type template and (iii) a PCR specificity enhancer, also to suppress false-positive amplification from the wild-type template. Mutant alleles were quantified relative to exon 9 of JAK2. Results We showed that the addition of the 3′dideoxy blocker suppressed but did not eliminate false-positive amplification from the wild-type template. However, the addition of the PCR specificity enhancer near eliminated false-positive amplification from the wild-type allele. Further discrimination between true and false positives was enabled by using the quantification cycle (Cq) value of a single mutant template as a cut-off point, thus enabling robust distinction between true and false positives. As 10,000 JAK2 templates were used per replicate, the assay had a sensitivity of 1/10-4 per replicate. Greater sensitivity could be reached by increasing the number of replicates analysed. Variation in replicates when low mutant-allele templates were present necessitated the use of a statistics-based approach to estimate the load of mutant JAK2 copies. QuanTAS-PCR showed comparable quantitative results when validated against a commercial assay. Conclusions QuanTAS-PCR is a simple, cost-efficient, closed-tube method for JAK2 V617F mutation quantification that can detect very low levels of the mutant allele, thus enabling analysis of minimal residual disease. The approach can be extended to the detection of other recurrent single nucleotide somatic changes in cancer.
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Affiliation(s)
- Giada V Zapparoli
- Department of Pathology, Peter MacCallum Cancer Centre, St Andrews Place, East Melbourne, Victoria 3002, Australia
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