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Guo H, Cui Y, Bai Y, Yan F, Zhang W, Chen Y, Shi M. Screening of a Prognostic Gene Signature for Relapsed/Refractory Acute Myeloid Leukemia Based on Altered Circulating CircRNA Profiles. Int J Gen Med 2024; 17:2967-2979. [PMID: 39006913 PMCID: PMC11244134 DOI: 10.2147/ijgm.s466364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Accepted: 06/22/2024] [Indexed: 07/16/2024] Open
Abstract
Background Relapsed/refractory acute myeloid leukemia (R/R-AML) has dismal prognosis due to chemotherapy resistance. Circular RNAs (circRNAs) have shown emerging roles in chemotherapy resistance in various cancers including hematologic malignancies. However, the potential roles of circRNAs in AML progression and drug resistance remain largely undetermined. Methods In this study, circulating circRNAs expression profiles were analyzed among R/R-AML, de novo AML and healthy controls (HC) using a human circRNA Array. Bioinformatic analysis was carried out to explore the differentially expressed circRNAs (DE-circRNAs). GO, KEGG pathway analysis, along with circRNA-miRNA-mRNA network analysis, were conducted to identify the potential biological pathways involved in R/R-AML. Finally, the UALCAN database was used to assess the prognosis of different target DE-circRNAs-related mRNAs. Results Forty-eight DE-circRNAs were upregulated, whereas twenty-seven DE-circRNAs were downregulated in R/R-AML samples. Up-regulated DE-circRNAs in R/R-AML samples were mainly enrichment in the biological processes and pathways of cell migration, microRNAs in cancers, Rap1 and Ras signaling pathways. Six DE-circRNAs were randomly selected to further explore their relationships with R/R-AML. GO and KEGG pathway analyses of the six candidate DE-circRNAs-related target mRNAs were mainly involved in the regulation of signal transduction and Ras signaling pathway. By overlapping our RNA-sequencing results of differentially expressed genes (DEGs) in R/R-AML samples with the candidate DE-circRNAs-predicted target mRNAs, we identified sixty-eight overlapping targeted mRNAs. Using UALCAN database analysis, we identified that AML patients with six upregulated DE-circRNA-related genes (ECE1, PI4K2A, SLC9A6, CCND3, PPP1R16B, and TRIM32) and one downregulated gene DE-circRNA-related genes (ARHGAP10) might have a poor prognosis. Conclusion This study revealed the overall alterations of circRNAs in R/R-AML. DE-circRNAs and their related genes might be used as potential early, sensitive and stable biomarkers for AML diagnosis, R/R-AML monitoring, and even as novel treatment targets for R/R-AML.
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Affiliation(s)
- Honggang Guo
- Department of Hematology, Zhengzhou University People’s Hospital and Henan Provincial People’s Hospital, Zhengzhou, People’s Republic of China
| | - Yabin Cui
- Department of Hematology, Henan University People’s Hospital, Zhengzhou, People’s Republic of China
| | - Yanliang Bai
- Department of Hematology, Zhengzhou University People’s Hospital and Henan Provincial People’s Hospital, Zhengzhou, People’s Republic of China
| | - Fan Yan
- Department of Hematology, Zhengzhou University People’s Hospital and Henan Provincial People’s Hospital, Zhengzhou, People’s Republic of China
| | - Wenhui Zhang
- Department of Hematology, Zhengzhou University People’s Hospital and Henan Provincial People’s Hospital, Zhengzhou, People’s Republic of China
| | - Yuqing Chen
- Department of Hematology, Zhengzhou University People’s Hospital and Henan Provincial People’s Hospital, Zhengzhou, People’s Republic of China
| | - Mingyue Shi
- Department of Hematology, Zhengzhou University People’s Hospital and Henan Provincial People’s Hospital, Zhengzhou, People’s Republic of China
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Yang FC, Agosto-Peña J. Epigenetic regulation by ASXL1 in myeloid malignancies. Int J Hematol 2023; 117:791-806. [PMID: 37062051 DOI: 10.1007/s12185-023-03586-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 03/02/2023] [Accepted: 03/22/2023] [Indexed: 04/17/2023]
Abstract
Myeloid malignancies are clonal hematopoietic disorders that are comprised of a spectrum of genetically heterogeneous disorders, including myelodysplastic syndromes (MDS), myeloproliferative neoplasms (MPN), chronic myelomonocytic leukemia (CMML), and acute myeloid leukemia (AML). Myeloid malignancies are characterized by excessive proliferation, abnormal self-renewal, and/or differentiation defects of hematopoietic stem cells (HSCs) and myeloid progenitor cells hematopoietic stem/progenitor cells (HSPCs). Myeloid malignancies can be caused by genetic and epigenetic alterations that provoke key cellular functions, such as self-renewal, proliferation, biased lineage commitment, and differentiation. Advances in next-generation sequencing led to the identification of multiple mutations in myeloid neoplasms, and many new gene mutations were identified as key factors in driving the pathogenesis of myeloid malignancies. The polycomb protein ASXL1 was identified to be frequently mutated in all forms of myeloid malignancies, with mutational frequencies of 20%, 43%, 10%, and 20% in MDS, CMML, MPN, and AML, respectively. Significantly, ASXL1 mutations are associated with a poor prognosis in all forms of myeloid malignancies. The fact that ASXL1 mutations are associated with poor prognosis in patients with CMML, MDS, and AML, points to the possibility that ASXL1 mutation is a key factor in the development of myeloid malignancies. This review summarizes the recent advances in understanding myeloid malignancies with a specific focus on ASXL1 mutations.
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Affiliation(s)
- Feng-Chun Yang
- Department of Cell Systems and Anatomy, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229, USA.
- Mays Cancer Center, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229, USA.
| | - Joel Agosto-Peña
- Department of Cell Systems and Anatomy, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229, USA
- Mays Cancer Center, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229, USA
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3
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Chia YC, Islam MA, Hider P, Woon PY, Johan MF, Hassan R, Ramli M. The Prevalence of TET2 Gene Mutations in Patients with BCR- ABL-Negative Myeloproliferative Neoplasms (MPN): A Systematic Review and Meta-Analysis. Cancers (Basel) 2021; 13:3078. [PMID: 34203097 PMCID: PMC8235080 DOI: 10.3390/cancers13123078] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 06/13/2021] [Accepted: 06/17/2021] [Indexed: 12/19/2022] Open
Abstract
Multiple recurrent somatic mutations have recently been identified in association with myeloproliferative neoplasms (MPN). This meta-analysis aims to assess the pooled prevalence of TET2 gene mutations among patients with MPN. Six databases (PubMed, Scopus, ScienceDirect, Google Scholar, Web of Science and Embase) were searched for relevant studies from inception till September 2020, without language restrictions. The eligibility criteria included BCR-ABL-negative MPN adults with TET2 gene mutations. A random-effects model was used to estimate the pooled prevalence with 95% confidence intervals (CIs). Subgroup analyses explored results among different continents and countries, WHO diagnostic criteria, screening methods and types of MF. Quality assessment was undertaken using the Joanna Briggs Institute critical appraisal tool. The study was registered with PROSPERO (CRD42020212223). Thirty-five studies were included (n = 5121, 47.1% female). Overall, the pooled prevalence of TET2 gene mutations in MPN patients was 15.5% (95% CI: 12.1-19.0%, I2 = 94%). Regional differences explained a substantial amount of heterogeneity. The prevalence of TET2 gene mutations among the three subtypes PV, ET and MF were 16.8%, 9.8% and 15.7%, respectively. The quality of the included studies was determined to be moderate-high among 83% of the included studies. Among patients with BCR-ABL-negative MPN, the overall prevalence of TET2 gene mutations was 15.5%.
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Affiliation(s)
- Yuh Cai Chia
- Department of Haematology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia; (Y.C.C.); (M.F.J.); (R.H.)
| | - Md Asiful Islam
- Department of Haematology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia; (Y.C.C.); (M.F.J.); (R.H.)
| | - Phil Hider
- Department of Population Health, University of Otago, Christchurch 8140, New Zealand;
| | - Peng Yeong Woon
- Department of Molecular Biology and Human Genetics, Tzu Chi University, Hualien 97004, Taiwan;
| | - Muhammad Farid Johan
- Department of Haematology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia; (Y.C.C.); (M.F.J.); (R.H.)
| | - Rosline Hassan
- Department of Haematology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia; (Y.C.C.); (M.F.J.); (R.H.)
| | - Marini Ramli
- Department of Haematology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia; (Y.C.C.); (M.F.J.); (R.H.)
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4
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RAS/CBL mutations predict resistance to JAK inhibitors in myelofibrosis and are associated with poor prognostic features. Blood Adv 2021; 4:3677-3687. [PMID: 32777067 DOI: 10.1182/bloodadvances.2020002175] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 07/06/2020] [Indexed: 12/21/2022] Open
Abstract
The dysregulation of the JAK/STAT pathway drives the pathogenesis of myelofibrosis (MF). Recently, several JAK inhibitors (JAKis) have been developed for treating MF. Select mutations (MTs) have been associated with impaired outcomes and are currently incorporated in molecularly annotated prognostic models. Mutations of RAS/MAPK pathway genes are frequently reported in cancer and at low frequencies in MF. In this study, we investigated the phenotypic, prognostic, and therapeutic implications of NRASMTs, KRASMTs, and CBLMTs (RAS/CBLMTs) in 464 consecutive MF patients. A total of 59 (12.7%) patients had RAS/CBLMTs: NRASMTs, n = 25 (5.4%); KRASMTs, n = 13 (2.8%); and CBLMTs, n = 26 (5.6%). Patients with RAS/CBLMTs were more likely to present with high-risk clinical and molecular features. RAS/CBLMTs were associated with inferior overall survival compared with patients without MTs and retained significance in a multivariate model, including the Mutation-Enhanced International Prognostic Score System (MIPSS70) risk factors and cytogenetics; however, inclusion of RAS/CBLMTs in molecularly annotated prognostic models did not improve the predictive power of the latter. The 5-year cumulative incidence of leukemic transformation was notably higher in the RAS/CBLMT cohort. Among 61 patients treated with JAKis and observed for a median time of 30 months, the rate of symptoms and spleen response at 6 months was significantly lower in the RAS/CBLMT cohort. Logistic regression analysis disclosed a significant inverse correlation between RAS/CBLMTs and the probability of achieving a symptom or spleen response that was retained in multivariate analysis. In summary, our study showed that RAS/CBLMTs are associated with adverse phenotypic features and survival outcomes and, more important, may predict reduced response to JAKis.
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5
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Luque Paz D, Riou J, Verger E, Cassinat B, Chauveau A, Ianotto JC, Dupriez B, Boyer F, Renard M, Mansier O, Murati A, Rey J, Etienne G, Mansat-De Mas V, Tavitian S, Nibourel O, Girault S, Le Bris Y, Girodon F, Ranta D, Chomel JC, Cony-Makhoul P, Sujobert P, Robles M, Ben Abdelali R, Kosmider O, Cottin L, Roy L, Sloma I, Vacheret F, Wemeau M, Mossuz P, Slama B, Cussac V, Denis G, Walter-Petrich A, Burroni B, Jézéquel N, Giraudier S, Lippert E, Socié G, Kiladjian JJ, Ugo V. Genomic analysis of primary and secondary myelofibrosis redefines the prognostic impact of ASXL1 mutations: a FIM study. Blood Adv 2021; 5:1442-1451. [PMID: 33666653 PMCID: PMC7948260 DOI: 10.1182/bloodadvances.2020003444] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 12/30/2020] [Indexed: 12/26/2022] Open
Abstract
We aimed to study the prognostic impact of the mutational landscape in primary and secondary myelofibrosis. The study included 479 patients with myelofibrosis recruited from 24 French Intergroup of Myeloproliferative Neoplasms (FIM) centers. The molecular landscape was studied by high-throughput sequencing of 77 genes. A Bayesian network allowed the identification of genomic groups whose prognostic impact was studied in a multistate model considering transitions from the 3 conditions: myelofibrosis, acute leukemia, and death. Results were validated using an independent, previously published cohort (n = 276). Four genomic groups were identified: patients with TP53 mutation; patients with ≥1 mutation in EZH2, CBL, U2AF1, SRSF2, IDH1, IDH2, NRAS, or KRAS (high-risk group); patients with ASXL1-only mutation (ie, no associated mutation in TP53 or high-risk genes); and other patients. A multistate model found that both TP53 and high-risk groups were associated with leukemic transformation (hazard ratios [HRs] [95% confidence interval], 8.68 [3.32-22.73] and 3.24 [1.58-6.64], respectively) and death from myelofibrosis (HRs, 3.03 [1.66-5.56] and 1.77 [1.18-2.67], respectively). ASXL1-only mutations had no prognostic value that was confirmed in the validation cohort. However, ASXL1 mutations conferred a worse prognosis when associated with a mutation in TP53 or high-risk genes. This study provides a new definition of adverse mutations in myelofibrosis with the addition of TP53, CBL, NRAS, KRAS, and U2AF1 to previously described genes. Furthermore, our results argue that ASXL1 mutations alone cannot be considered detrimental.
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Affiliation(s)
- Damien Luque Paz
- Univ Angers, INSERM, CRCINA, Angers, France
- Laboratoire d'Hématologie, Centre Hospitalier Universitaire (CHU) Angers, Angers, France
- Univ Angers, UFR Santé, Angers, France
| | - Jérémie Riou
- Univ Angers, INSERM, Unit 1066 minT, Angers, France
| | - Emmanuelle Verger
- Laboratoire de Biologie Cellulaire, Assistance Publique-Hôpitaux de Paris, Hôpital Saint-Louis, Paris, France
- Université de Paris, U1131 INSERM, IRSL, Paris, France
| | - Bruno Cassinat
- Laboratoire de Biologie Cellulaire, Assistance Publique-Hôpitaux de Paris, Hôpital Saint-Louis, Paris, France
- Université de Paris, U1131 INSERM, IRSL, Paris, France
| | | | | | | | | | - Maxime Renard
- Univ Angers, INSERM, CRCINA, Angers, France
- Laboratoire d'Hématologie, Centre Hospitalier Universitaire (CHU) Angers, Angers, France
- Univ Angers, UFR Santé, Angers, France
| | - Olivier Mansier
- Laboratoire d'Hématologie, CHU Bordeaux, Bordeaux, France
- Université de Bordeaux, INSERM U1034, Bordeaux, France
| | - Anne Murati
- Département de Biopathologie et Département d'Oncologie Prédictive and
| | - Jérôme Rey
- Département d'Hématologie, Centre de Recherche en Cancérologie de Marseille, Institut Paoli-Calmettes, INSERM, Marseille, France
| | - Gabriel Etienne
- Département d'Hématologie, Institut Bergonié, Bordeaux, France
| | | | - Suzanne Tavitian
- Service d'Hématologie, CHU Toulouse, Institut Universitaire du Cancer de Toulouse Oncopole, Toulouse, France
| | - Olivier Nibourel
- Laboratoire d'Hématologie Cellulaire and
- UMR 9020-UMR-S 1277-Canther-Cancer Heterogeneity, Plasticity and Resistance to Therapies, Institut de Recherche contre le Cancer de Lille, University Lille, CNRS, INSERM, CHU Lille, Lille, France
| | | | - Yannick Le Bris
- Laboratoire d'Hématologie, CHU Nantes, Nantes, France
- Université de Nantes, INSERM, CRCINA, Nantes, France
| | | | - Dana Ranta
- Hématologie Clinique, CHU Nancy, Nancy, France
| | | | | | - Pierre Sujobert
- Service d'Hématologie Biologique, Hospices Civils de Lyon, Hôpital Lyon Sud, Pierre-Bénite, France
| | - Margot Robles
- Hématologie Clinique, CH Périgueux, Périgueux, France
| | - Raouf Ben Abdelali
- Pôle Hématologie et Oncologie, Laboratoire Cerba, Saint-Ouen L'Aumône, France
| | - Olivier Kosmider
- Laboratoire d'Hématologie, Assistance Publique-Hôpitaux de Paris, Hôpital Cochin, Paris, France
| | - Laurane Cottin
- Univ Angers, INSERM, CRCINA, Angers, France
- Laboratoire d'Hématologie, Centre Hospitalier Universitaire (CHU) Angers, Angers, France
- Univ Angers, UFR Santé, Angers, France
| | - Lydia Roy
- Service d'Hématologie, Assistance Publique-Hôpitaux de Paris, Hôpital Henri Mondor, Créteil, France
- Faculté de Santé, Université Paris Est Créteil (UPEC), Créteil, France
| | - Ivan Sloma
- Département d'Hématologie et Immunologie, Assistance Publique-Hôpitaux de Paris, Hôpital Henri Mondor, Créteil, France
- Université Paris Est Créteil, INSERM, IMRB, Créteil, France
| | | | | | - Pascal Mossuz
- Laboratoire d'Hématologie, CHU Grenoble, Grenoble, France
| | - Borhane Slama
- Service d'Onco-Hématologie, CH Avignon, Avignon, France
| | | | | | | | - Barbara Burroni
- Département d'Anatomo-Pathologie, Assistance Publique-Hôpitaux de Paris, Hôpital Cochin, Paris, France
| | | | - Stéphane Giraudier
- Laboratoire de Biologie Cellulaire, Assistance Publique-Hôpitaux de Paris, Hôpital Saint-Louis, Paris, France
- Université de Paris, U1131 INSERM, IRSL, Paris, France
| | | | - Gérard Socié
- Hématologie-Transplantation, Assistance Publique-Hôpitaux de Paris, Hôpital Saint-Louis, Paris, France; and
| | - Jean-Jacques Kiladjian
- Université de Paris, U1131 INSERM, IRSL, Paris, France
- Centre d'Investigations Cliniques (INSERM CIC1427), Assistance Publique-Hôpitaux de Paris, Hôpital Saint-Louis, Paris, France
| | - Valérie Ugo
- Univ Angers, INSERM, CRCINA, Angers, France
- Laboratoire d'Hématologie, Centre Hospitalier Universitaire (CHU) Angers, Angers, France
- Univ Angers, UFR Santé, Angers, France
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6
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Coltro G, Rotunno G, Mannelli L, Mannarelli C, Fiaccabrino S, Romagnoli S, Bartalucci N, Ravenda E, Gelli E, Sant'Antonio E, Patnaik MM, Tefferi A, Vannucchi AM, Guglielmelli P. RAS/CBL mutations predict resistance to JAK inhibitors in myelofibrosis and are associated with poor prognostic features. Blood Adv 2020. [PMID: 32777067 DOI: 10.1182/blood-advances.2020002175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023] Open
Abstract
The dysregulation of the JAK/STAT pathway drives the pathogenesis of myelofibrosis (MF). Recently, several JAK inhibitors (JAKis) have been developed for treating MF. Select mutations (MTs) have been associated with impaired outcomes and are currently incorporated in molecularly annotated prognostic models. Mutations of RAS/MAPK pathway genes are frequently reported in cancer and at low frequencies in MF. In this study, we investigated the phenotypic, prognostic, and therapeutic implications of NRASMTs, KRASMTs, and CBLMTs (RAS/CBLMTs) in 464 consecutive MF patients. A total of 59 (12.7%) patients had RAS/CBLMTs: NRASMTs, n = 25 (5.4%); KRASMTs, n = 13 (2.8%); and CBLMTs, n = 26 (5.6%). Patients with RAS/CBLMTs were more likely to present with high-risk clinical and molecular features. RAS/CBLMTs were associated with inferior overall survival compared with patients without MTs and retained significance in a multivariate model, including the Mutation-Enhanced International Prognostic Score System (MIPSS70) risk factors and cytogenetics; however, inclusion of RAS/CBLMTs in molecularly annotated prognostic models did not improve the predictive power of the latter. The 5-year cumulative incidence of leukemic transformation was notably higher in the RAS/CBLMT cohort. Among 61 patients treated with JAKis and observed for a median time of 30 months, the rate of symptoms and spleen response at 6 months was significantly lower in the RAS/CBLMT cohort. Logistic regression analysis disclosed a significant inverse correlation between RAS/CBLMTs and the probability of achieving a symptom or spleen response that was retained in multivariate analysis. In summary, our study showed that RAS/CBLMTs are associated with adverse phenotypic features and survival outcomes and, more important, may predict reduced response to JAKis.
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Affiliation(s)
- Giacomo Coltro
- Department of Clinical and Experimental Medicine, University of Florence, Florence, Italy
- Center of Research and Innovation for Myeloproliferative Neoplasms (CRIMM), Azienda Ospedaliero-Universitaria Careggi, Florence, Italy
| | - Giada Rotunno
- Department of Clinical and Experimental Medicine, University of Florence, Florence, Italy
- Center of Research and Innovation for Myeloproliferative Neoplasms (CRIMM), Azienda Ospedaliero-Universitaria Careggi, Florence, Italy
| | - Lara Mannelli
- Department of Clinical and Experimental Medicine, University of Florence, Florence, Italy
- Center of Research and Innovation for Myeloproliferative Neoplasms (CRIMM), Azienda Ospedaliero-Universitaria Careggi, Florence, Italy
- Department of Medical Genetics, University of Siena, Siena, Italy
| | - Carmela Mannarelli
- Department of Clinical and Experimental Medicine, University of Florence, Florence, Italy
- Center of Research and Innovation for Myeloproliferative Neoplasms (CRIMM), Azienda Ospedaliero-Universitaria Careggi, Florence, Italy
| | - Sara Fiaccabrino
- Department of Clinical and Experimental Medicine, University of Florence, Florence, Italy
- Center of Research and Innovation for Myeloproliferative Neoplasms (CRIMM), Azienda Ospedaliero-Universitaria Careggi, Florence, Italy
| | - Simone Romagnoli
- Department of Clinical and Experimental Medicine, University of Florence, Florence, Italy
- Center of Research and Innovation for Myeloproliferative Neoplasms (CRIMM), Azienda Ospedaliero-Universitaria Careggi, Florence, Italy
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Niccolò Bartalucci
- Department of Clinical and Experimental Medicine, University of Florence, Florence, Italy
- Center of Research and Innovation for Myeloproliferative Neoplasms (CRIMM), Azienda Ospedaliero-Universitaria Careggi, Florence, Italy
| | - Enrica Ravenda
- Department of Clinical and Experimental Medicine, University of Florence, Florence, Italy
- Center of Research and Innovation for Myeloproliferative Neoplasms (CRIMM), Azienda Ospedaliero-Universitaria Careggi, Florence, Italy
| | - Eleonora Gelli
- Center of Research and Innovation for Myeloproliferative Neoplasms (CRIMM), Azienda Ospedaliero-Universitaria Careggi, Florence, Italy
- Faculty of Medicine and Surgery, University of Florence, Florence, Italy; and
| | - Emanuela Sant'Antonio
- Department of Clinical and Experimental Medicine, University of Florence, Florence, Italy
- Center of Research and Innovation for Myeloproliferative Neoplasms (CRIMM), Azienda Ospedaliero-Universitaria Careggi, Florence, Italy
| | | | | | - Alessandro M Vannucchi
- Department of Clinical and Experimental Medicine, University of Florence, Florence, Italy
- Center of Research and Innovation for Myeloproliferative Neoplasms (CRIMM), Azienda Ospedaliero-Universitaria Careggi, Florence, Italy
| | - Paola Guglielmelli
- Department of Clinical and Experimental Medicine, University of Florence, Florence, Italy
- Center of Research and Innovation for Myeloproliferative Neoplasms (CRIMM), Azienda Ospedaliero-Universitaria Careggi, Florence, Italy
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7
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Grinfeld J. Prognostic models in the myeloproliferative neoplasms. Blood Rev 2020; 42:100713. [DOI: 10.1016/j.blre.2020.100713] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 02/25/2020] [Accepted: 05/27/2020] [Indexed: 01/09/2023]
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8
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Santos FPS, Getta B, Masarova L, Famulare C, Schulman J, Datoguia TS, Puga RD, Alves Paiva RDM, Arcila ME, Hamerschlak N, Kantarjian HM, Levine RL, Campregher PV, Rampal RK, Verstovsek S. Prognostic impact of RAS-pathway mutations in patients with myelofibrosis. Leukemia 2020; 34:799-810. [PMID: 31628430 PMCID: PMC7158221 DOI: 10.1038/s41375-019-0603-9] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 07/30/2019] [Accepted: 08/28/2019] [Indexed: 11/09/2022]
Abstract
RAS-pathway mutations are recurrent events in myeloid malignancies. However, there is limited data on the significance of RAS-pathway mutations in patients with myelofibrosis (MF). We analyzed next-generation sequencing data of 16 genes, including RAS-pathway genes, from 723 patients with primary and secondary MF across three international centers and evaluated their significance. N/KRAS variants were present in 6% of patients and were typically sub-clonal (median VAF = 20%) relative to other genes variants. RAS variants were associated with advanced MF features including leukocytosis (p = 0.02), high somatic mutation burden (p < 0.01) and the presence of established "molecular high-risk" (MHR) mutations. MF patients with N/KRAS mutations had shorter 3-year overall survival (OS) (34% vs 58%, p < 0.001) and higher incidence of acute myeloid leukemia at 3 years (18% vs 11%, p = 0.03). In a multivariate Cox model, RAS mutations were associated with decreased OS (HR 1.93, p < 0.001). We created a novel score to predict OS incorporating RAS mutations, and it predicted OS across training and validation cohorts. Patients with intermediate risk/high-risk DIPSS with RAS mutations who received ruxolitinib had a nonsignificant longer 2-year OS relative to those who did not receive ruxolitinib. These data demonstrate the importance of identifying RAS mutations in MF patients.
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Affiliation(s)
- Fabio P S Santos
- Centro de Hematologia e Oncologia Familia Dayan-Daycoval, Hospital Israelita Albert Einstein, São Paulo, Brazil.
| | - Bartlomiej Getta
- Leukemia Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Lucia Masarova
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Christopher Famulare
- Center for Hematologic Malignancies, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Jessica Schulman
- Center for Hematologic Malignancies, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Tarcila S Datoguia
- Centro de Hematologia e Oncologia Familia Dayan-Daycoval, Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Renato D Puga
- Centro de Hematologia e Oncologia Familia Dayan-Daycoval, Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Raquel de Melo Alves Paiva
- Centro de Hematologia e Oncologia Familia Dayan-Daycoval, Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Maria E Arcila
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Nelson Hamerschlak
- Centro de Hematologia e Oncologia Familia Dayan-Daycoval, Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Hagop M Kantarjian
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Ross L Levine
- Leukemia Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Center for Hematologic Malignancies, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Paulo Vidal Campregher
- Centro de Hematologia e Oncologia Familia Dayan-Daycoval, Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Raajit K Rampal
- Leukemia Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
- Center for Hematologic Malignancies, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
| | - Srdan Verstovsek
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
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9
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Courtier F, Garnier S, Carbuccia N, Guille A, Adélaide J, Chaffanet M, Hirsch P, Paz DL, Slama B, Vey N, Ugo V, Delhommeau F, Rey J, Birnbaum D, Murati A. Targeted molecular characterization shows differences between primary and secondary myelofibrosis. Genes Chromosomes Cancer 2020; 59:30-39. [PMID: 31340059 DOI: 10.1002/gcc.22789] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 06/07/2019] [Accepted: 06/13/2019] [Indexed: 01/24/2023] Open
Abstract
INTRODUCTION In BCR-ABL1-negative myeloproliferative neoplasms, myelofibrosis (MF) is either primary (PMF) or secondary (SMF) to polycythemia vera or essential thrombocythemia. MF is characterized by an increased risk of transformation to acute myeloid leukemia (AML) and a shortened life expectancy. METHODS Because natural histories of PMF and SMF are different, we studied by targeted next generation sequencing the differences in the molecular landscape of 86 PMF and 59 SMF and compared their prognosis impact. RESULTS PMF had more ASXL1 (47.7%) and SRSF2 (14%) gene mutations than SMF (respectively 27.1% and 3.4%, P = .04). Poorer survival was associated with RNA splicing mutations (especially SRSF2) and TP53 in PMF (P = .0003), and with ASXL1 and TP53 mutations in SMF (P < .0001). These mutations of poor prognosis were associated with biological features of scoring systems (DIPSS and MYSEC-PM score). Mutations in TP53/SRSF2 in PMF or TP53/ASXL1 in SMF were more frequent as the risk of these scores increased. This allowed for a better stratification of MF patients, especially within the DIPSS intermediate-1 risk group (DIPSS) or the MYSEC-PM high risk group. AML transformation occurred faster in SMF than in PMF and patients who transformed to AML were more SRSF2-mutated and less CALR-mutated at MF sampling. CONCLUSIONS PMF and SMF have different but not specific molecular profiles and different prognosis depending on the molecular profile. This may be due to differences in disease history. Combining mutations and existing scores should improve prognosis assessment.
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Affiliation(s)
- Frédéric Courtier
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Département d'Oncologie Prédictive, Institut Paoli-Calmettes (IPC), Marseille, France.,Aix-Marseille Université, Marseille, France
| | - Séverine Garnier
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Département d'Oncologie Prédictive, Institut Paoli-Calmettes (IPC), Marseille, France
| | - Nadine Carbuccia
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Département d'Oncologie Prédictive, Institut Paoli-Calmettes (IPC), Marseille, France
| | - Arnaud Guille
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Département d'Oncologie Prédictive, Institut Paoli-Calmettes (IPC), Marseille, France
| | - José Adélaide
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Département d'Oncologie Prédictive, Institut Paoli-Calmettes (IPC), Marseille, France
| | - Max Chaffanet
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Département d'Oncologie Prédictive, Institut Paoli-Calmettes (IPC), Marseille, France.,Aix-Marseille Université, Marseille, France
| | - Pierre Hirsch
- Centre de Recherche Saint-Antoine CRSA, APHP, Hôpital Saint-Antoine, Sorbonne Université, Inserm, Paris, France
| | | | - Bohrane Slama
- Centre Hospitalier Général d'Avignon, Service d'Onco-Hématologie, France
| | - Norbert Vey
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Aix-Marseille Université, Marseille, France.,Département d'Hématologie, IPC, Marseille, France
| | - Valérie Ugo
- Laboratoire d'Hématologie, CHU d'Angers, Angers, France
| | - François Delhommeau
- Centre de Recherche Saint-Antoine CRSA, APHP, Hôpital Saint-Antoine, Sorbonne Université, Inserm, Paris, France
| | - Jérome Rey
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Département d'Hématologie, IPC, Marseille, France
| | - Daniel Birnbaum
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Département d'Oncologie Prédictive, Institut Paoli-Calmettes (IPC), Marseille, France.,Aix-Marseille Université, Marseille, France
| | - Anne Murati
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Département d'Oncologie Prédictive, Institut Paoli-Calmettes (IPC), Marseille, France.,Département de BioPathologie, IPC, Marseille, France
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10
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Rack KA, van den Berg E, Haferlach C, Beverloo HB, Costa D, Espinet B, Foot N, Jeffries S, Martin K, O'Connor S, Schoumans J, Talley P, Telford N, Stioui S, Zemanova Z, Hastings RJ. European recommendations and quality assurance for cytogenomic analysis of haematological neoplasms. Leukemia 2019; 33:1851-1867. [PMID: 30696948 PMCID: PMC6756035 DOI: 10.1038/s41375-019-0378-z] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 12/11/2018] [Accepted: 12/17/2018] [Indexed: 12/20/2022]
Abstract
Cytogenomic investigations of haematological neoplasms, including chromosome banding analysis, fluorescence in situ hybridisation (FISH) and microarray analyses have become increasingly important in the clinical management of patients with haematological neoplasms. The widespread implementation of these techniques in genetic diagnostics has highlighted the need for guidance on the essential criteria to follow when providing cytogenomic testing, regardless of choice of methodology. These recommendations provide an updated, practical and easily available document that will assist laboratories in the choice of testing and methodology enabling them to operate within acceptable standards and maintain a quality service.
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Affiliation(s)
- K A Rack
- GenQA, John Radcliffe Hospital, Oxford University Hospitals NHS Trust, Oxford, UK
| | - E van den Berg
- Department of Genetics University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - C Haferlach
- MLL-Munich Leukemia Laboratory, Munich, Germany
| | - H B Beverloo
- Department of Clinical Genetics, Erasmus MC, University medical center, Rotterdam, The Netherlands
| | - D Costa
- Hematopathology Section, Hospital Clinic, Barcelona, Spain
| | - B Espinet
- Laboratori de Citogenètica Molecular, Servei de Patologia, Grup de Recerca,Translacional en Neoplàsies Hematològiques, Cancer Research Program, imim-Hospital del Mar, Barcelona, Spain
| | - N Foot
- Viapath Genetics laboratories, Guys Hospital, London, UK
| | - S Jeffries
- West Midlands Regional Genetics Laboratory, Birmingham Women's Hospital, Birmingham, UK
| | - K Martin
- Department of Cytogenetics, Nottingham University Hospital, Nottingham, UK
| | - S O'Connor
- Haematological Malignancy Diagnostic Service, St James's University Hospital, Leeds, UK
| | - J Schoumans
- Oncogénomique laboratory, Hematology department, Lausanne University Hospital, Vaudois, Switzerland
| | - P Talley
- Haematological Malignancy Diagnostic Service, St James's University Hospital, Leeds, UK
| | - N Telford
- Oncology Cytogenetics Service, The Christie NHS Foundation Trust, Manchester, UK
| | - S Stioui
- Laboratorio di Citogenetica e genetica moleculaire, Laboratorio Analisi, Humanitas Research Hospital, Rozzano, Milan, Italy
| | - Z Zemanova
- Prague Center of Oncocytogenetics, Institute of Clinical Biochemistry and Laboratory Diagnostics, General University Hospital and First Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
| | - R J Hastings
- GenQA, John Radcliffe Hospital, Oxford University Hospitals NHS Trust, Oxford, UK.
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11
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Guo Y, Zhou Y, Yamatomo S, Yang H, Zhang P, Chen S, Nimer SD, Zhao ZJ, Xu M, Bai J, Yang FC. ASXL1 alteration cooperates with JAK2V617F to accelerate myelofibrosis. Leukemia 2019; 33:1287-1291. [PMID: 30651633 DOI: 10.1038/s41375-018-0347-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 11/20/2018] [Accepted: 11/29/2018] [Indexed: 12/30/2022]
Affiliation(s)
- Ying Guo
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Yuan Zhou
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Shohei Yamatomo
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Hui Yang
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Peng Zhang
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Shi Chen
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Stephen D Nimer
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Zhizhuang Joe Zhao
- Department of Pathology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Mingjiang Xu
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Jie Bai
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.
- Department of Hematology, the Second Hospital of Tianjin Medical University, Tianjin, China.
| | - Feng-Chun Yang
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA.
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, USA.
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12
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Martínez-Calle N, Pascual M, Ordoñez R, Enériz ESJ, Kulis M, Miranda E, Guruceaga E, Segura V, Larráyoz MJ, Bellosillo B, Calasanz MJ, Besses C, Rifón J, Martín-Subero JI, Agirre X, Prosper F. Epigenomic profiling of myelofibrosis reveals widespread DNA methylation changes in enhancer elements and ZFP36L1 as a potential tumor suppressor gene that is epigenetically regulated. Haematologica 2019; 104:1572-1579. [PMID: 30655376 PMCID: PMC6669145 DOI: 10.3324/haematol.2018.204917] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 01/15/2019] [Indexed: 12/19/2022] Open
Abstract
In this study we interrogated the DNA methylome of myelofibrosis patients using high-density DNA methylation arrays. We detected 35,215 differentially methylated CpG, corresponding to 10,253 genes, between myelofibrosis patients and healthy controls. These changes were present both in primary and secondary myelofibrosis, which showed no differences between them. Remarkably, most differentially methylated CpG were located outside gene promoter regions and showed significant association with enhancer regions. This aberrant enhancer hypermethylation was negatively correlated with the expression of 27 genes in the myelofibrosis cohort. Of these, we focused on the ZFP36L1 gene and validated its decreased expression and enhancer DNA hypermethylation in an independent cohort of patients and myeloid cell-lines. In vitro reporter assay and 5’-azacitidine treatment confirmed the functional relevance of hyper-methylation of ZFP36L1 enhancer. Furthermore, in vitro rescue of ZFP36L1 expression had an impact on cell proliferation and induced apoptosis in SET-2 cell line indicating a possible role of ZFP36L1 as a tumor suppressor gene in myelofibrosis. Collectively, we describe the DNA methylation profile of myelofibrosis, identifying extensive changes in enhancer elements and revealing ZFP36L1 as a novel candidate tumor suppressor gene.
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Affiliation(s)
- Nicolás Martínez-Calle
- Área de Hemato-Oncología, Centro de Investigación Médica Aplicada, IDISNA, Universidad de Navarra, Pamplona.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid
| | - Marien Pascual
- Área de Hemato-Oncología, Centro de Investigación Médica Aplicada, IDISNA, Universidad de Navarra, Pamplona.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid
| | - Raquel Ordoñez
- Área de Hemato-Oncología, Centro de Investigación Médica Aplicada, IDISNA, Universidad de Navarra, Pamplona.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid
| | - Edurne San José Enériz
- Área de Hemato-Oncología, Centro de Investigación Médica Aplicada, IDISNA, Universidad de Navarra, Pamplona.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid
| | - Marta Kulis
- Fundació Clínic per a la Recerca Biomèdica, Barcelona
| | - Estíbaliz Miranda
- Área de Hemato-Oncología, Centro de Investigación Médica Aplicada, IDISNA, Universidad de Navarra, Pamplona.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid
| | - Elisabeth Guruceaga
- Unidad de Bioinformática, Centro de Investigación Médica Aplicada, Universidad de Navarra, Pamplona
| | - Víctor Segura
- Unidad de Bioinformática, Centro de Investigación Médica Aplicada, Universidad de Navarra, Pamplona
| | | | | | - María José Calasanz
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid.,CIMA Laboratory of Diagnostics, Universidad de Navarra, Pamplona
| | - Carles Besses
- Departmento de Hematología, Hospital del Mar, Barcelona
| | - José Rifón
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid.,Departamento de Hematología, Clínica Universidad de Navarra, Universidad de Navarra, Pamplona
| | - José I Martín-Subero
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona.,Departament de Fonaments Clinics, Facultat de Medicina, Universitat de Barcelona, Barcelona, Spain
| | - Xabier Agirre
- Área de Hemato-Oncología, Centro de Investigación Médica Aplicada, IDISNA, Universidad de Navarra, Pamplona .,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid
| | - Felipe Prosper
- Área de Hemato-Oncología, Centro de Investigación Médica Aplicada, IDISNA, Universidad de Navarra, Pamplona .,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid.,Departamento de Hematología, Clínica Universidad de Navarra, Universidad de Navarra, Pamplona
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13
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Rego de Paula Junior M, Nonino A, Minuncio Nascimento J, Bonadio RS, Pic-Taylor A, de Oliveira SF, Wellerson Pereira R, do Couto Mascarenhas C, Forte Mazzeu J. High Frequency of Copy-Neutral Loss of Heterozygosity in Patients with Myelofibrosis. Cytogenet Genome Res 2018; 154:62-70. [DOI: 10.1159/000487627] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/19/2017] [Indexed: 12/16/2022] Open
Abstract
Myelofibrosis is the rarest and most severe type of Philadelphia-negative classical myeloproliferative neoplasms. Although mutually exclusive driver mutations in JAK2, MPL, or CALR that activate JAK-STAT pathway have been related to the pathogenesis of the disease, chromosome abnormalities have also been associated with the phenotype and prognosis of the disease. Here, we report the use of a chromosomal microarray platform consisting of both oligo and SNP probes to improve the detection of chromosome abnormalities in patients with myelofibrosis. Sixteen patients with myelofibrosis were tested, and the results were compared to karyotype analysis. Driver mutations in JAK2, MPL, or CALR were investigated by PCR and MLPA. Conventional cytogenetics revealed chromosome abnormalities in 3 out of 16 cases (18.7%), while chromosomal microarray analysis detected copy-number variations (CNV) or copy-neutral loss of heterozygosity (CN-LOH) alterations in 11 out of 16 (68.7%) patients. These included 43 CN-LOH, 14 deletions, 1 trisomy, and 1 duplication. Ten patients showed multiple chromosomal abnormalities, varying from 2 to 13 CNVs or CN-LOHs. Mutational status for JAK2, CALR, and MPL by MLPA revealed a total of 3/16 (18.7%) patients positive for the JAK2 V617F mutation, 9 with CALR deletion or insertion and 1 positive for MPL mutation. Considering that most of the CNVs identified were smaller than the karyotype resolution and the high frequency of CN-LOHs in our study, we propose that chromosomal microarray platforms that combine oligos and SNP should be used as a first-tier genetic test in patients with myelofibrosis.
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14
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Lucijanic M, Prka Z, Pejsa V, Stoos-Veic T, Lucijanic J, Kusec R. Prognostic implications of low transferrin saturation in patients with primary myelofibrosis. Leuk Res 2018; 66:89-95. [PMID: 29407589 DOI: 10.1016/j.leukres.2018.01.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 01/15/2018] [Accepted: 01/22/2018] [Indexed: 10/18/2022]
Abstract
OBJECTIVES Transferrin saturation (TSAT) 20% or less is considered to represent functional iron deficiency in the context of malignant disease, phenomenon mediated through inflammatory changes of iron homeostasis. We aimed to investigate clinical and prognostic significance of low TSAT in patients with primary (PMF) and secondary myelofibrosis (SMF), malignant diseases characterized by strong inflammatory milieu. METHODS We retrospectively analyzed 87 patients with myelofibrosis and compared TSAT with disease specific parameters. RESULTS One-third of patients had TSAT ≤20%. Lower TSAT was significantly associated with Janus-kinase-2 (JAK2) mutation (P = 0.007), transfusion independency (P = 0.003), higher platelets (P = 0.004), lower mean-corpuscular-volume (P < 0.001), lower ferritin (P < 0.001), higher absolute-neutrophil-count (P = 0.027), lower absolute-lymphocyte-count (P = 0.041) and lower albumin (P = 0.018). PMF patients presenting with low TSAT (≤20%) experienced significantly shorter overall-survival (OS) (HR = 2.43; P = 0.017), whereas TSAT did not affect OS of SMF patients (HR = 1.48; P = 0.623). Low TSAT remained significantly associated with inferior OS in PMF in a series of multivariate Cox regression models comparing its properties to anemia, transfusion dependency, ferritin and Dynamic-International-Prognostic-System (DIPSS). CONCLUSIONS Low TSAT has detrimental effect on survival of PMF patients. This effect is independent of anemia and of ferritin levels that seem to be better at representing iron overload in PMF patients.
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Affiliation(s)
- Marko Lucijanic
- Hematology Department, University Hospital Dubrava, Av. Gojka Suska 6, 10000 Zagreb, Croatia.
| | - Zeljko Prka
- School of Medicine, University of Zagreb, Salata 3, 10000 Zagreb, Croatia
| | - Vlatko Pejsa
- Hematology Department, University Hospital Dubrava, Av. Gojka Suska 6, 10000 Zagreb, Croatia; School of Medicine, University of Zagreb, Salata 3, 10000 Zagreb, Croatia
| | - Tajana Stoos-Veic
- Department of Clinical Cytology and Cytometry, University Hospital Dubrava, Av. Gojka Suska 6, 10000 Zagreb, Croatia; Faculty of Medicine, University of Osijek, Ul. Josipa Huttlera 4, 31000 Osijek, Croatia
| | - Jelena Lucijanic
- Health Care Center Zagreb-West, Prilaz baruna Filipovica 11, 10000 Zagreb, Croatia
| | - Rajko Kusec
- Hematology Department, University Hospital Dubrava, Av. Gojka Suska 6, 10000 Zagreb, Croatia; School of Medicine, University of Zagreb, Salata 3, 10000 Zagreb, Croatia; Divison of Molecular Diagnosis and Genetics, Clinical Department of Laboratory Diagnostics, University Hospital Dubrava, Av. Gojka Suska 6, 10000 Zagreb, Croatia
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15
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Boratkó A, Csortos C. TIMAP, the versatile protein phosphatase 1 regulator in endothelial cells. IUBMB Life 2017; 69:918-928. [DOI: 10.1002/iub.1695] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 10/26/2017] [Indexed: 01/28/2023]
Affiliation(s)
- Anita Boratkó
- Department of Medical Chemistry; Faculty of Medicine, University of Debrecen, Egyetem tér 1; Debrecen Hungary
| | - Csilla Csortos
- Department of Medical Chemistry; Faculty of Medicine, University of Debrecen, Egyetem tér 1; Debrecen Hungary
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16
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Li B, Gale RP, Xu Z, Qin T, Song Z, Zhang P, Bai J, Zhang L, Zhang Y, Liu J, Huang G, Xiao Z. Non-driver mutations in myeloproliferative neoplasm-associated myelofibrosis. J Hematol Oncol 2017; 10:99. [PMID: 28464892 PMCID: PMC5414291 DOI: 10.1186/s13045-017-0472-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 04/26/2017] [Indexed: 11/30/2022] Open
Abstract
We studied non-driver mutations in 62 subjects with myeloproliferative neoplasm (MPN)-associated myelofibrosis upon diagnosis, including 45 subjects with primary myelofibrosis (PMF) and 17 with post-polycythemia vera or post-essential thrombocythemia myelofibrosis (post-PV/ET MF). Fifty-eight subjects had ≥1 non-driver mutation upon diagnosis. Mutations in mRNA splicing genes, especially in U2AF1, were significantly more frequent in PMF than in post-PV/ET MF (33 vs. 6%; P = 0.015). There were also striking differences in clonal architecture. These data indicate different genomic spectrums between PMF and post-PV/ET MF.
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Affiliation(s)
- Bing Li
- MDS and MPN Centre, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, 288 Nanjing Road, Tianjin, 300020 China
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Robert Peter Gale
- Haematology Research Centre, Division of Experimental Medicine, Department of Medicine, Imperial College London, London, UK
| | - Zefeng Xu
- MDS and MPN Centre, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, 288 Nanjing Road, Tianjin, 300020 China
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Tiejun Qin
- MDS and MPN Centre, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, 288 Nanjing Road, Tianjin, 300020 China
| | - Zhen Song
- Medical Service Division, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Peihong Zhang
- Department of Pathology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Jie Bai
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Lei Zhang
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Yue Zhang
- MDS and MPN Centre, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, 288 Nanjing Road, Tianjin, 300020 China
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Jinqin Liu
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Gang Huang
- Divisions of Experimental Hematology and Cancer Biology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH USA
| | - Zhijian Xiao
- MDS and MPN Centre, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, 288 Nanjing Road, Tianjin, 300020 China
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
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17
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Grinfeld J, Godfrey AL. After 10 years of JAK2V617F: Disease biology and current management strategies in polycythaemia vera. Blood Rev 2017; 31:101-118. [DOI: 10.1016/j.blre.2016.11.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 11/08/2016] [Accepted: 11/14/2016] [Indexed: 12/12/2022]
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18
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Luque Paz D, Chauveau A, Boyer F, Buors C, Samaison L, Cottin L, Seegers V, Férec C, Le Maréchal C, Gueguen P, Lippert E, Ianotto JC, Ugo V. Sequential analysis of 18 genes in polycythemia vera and essential thrombocythemia reveals an association between mutational status and clinical outcome. Genes Chromosomes Cancer 2017; 56:354-362. [DOI: 10.1002/gcc.22437] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 12/02/2016] [Accepted: 12/03/2016] [Indexed: 12/29/2022] Open
Affiliation(s)
- Damien Luque Paz
- CHU Angers, Laboratoire d'Hématologie; Angers France
- Université d'Angers, UFR Santé; Angers France
- INSERM Unité 892, CNRS Unit 6299; Angers France
- Fédération Hospitalo-Universitaire ‘Grand Ouest Against Leukemia’ (FHU GOAL)
| | - Aurélie Chauveau
- Fédération Hospitalo-Universitaire ‘Grand Ouest Against Leukemia’ (FHU GOAL)
- CHU Brest, Laboratoire d'Hématologie; Brest France
- Université de Brest, Bretagne Occidentale, UFR Médecine; Brest France
- INSERM Unité 1078, CHRU Brest; Brest France
| | - Françoise Boyer
- Fédération Hospitalo-Universitaire ‘Grand Ouest Against Leukemia’ (FHU GOAL)
- CHU Angers, Service des Maladies du Sang; Angers France
| | - Caroline Buors
- Fédération Hospitalo-Universitaire ‘Grand Ouest Against Leukemia’ (FHU GOAL)
- CHU Brest, Laboratoire d'Hématologie; Brest France
| | | | - Laurane Cottin
- CHU Angers, Laboratoire d'Hématologie; Angers France
- Université d'Angers, UFR Santé; Angers France
- INSERM Unité 892, CNRS Unit 6299; Angers France
- Fédération Hospitalo-Universitaire ‘Grand Ouest Against Leukemia’ (FHU GOAL)
| | - Valérie Seegers
- Université d'Angers, UFR Santé; Angers France
- INSERM Unité 892, CNRS Unit 6299; Angers France
- Département de Statistique; Institut de Cancérologie de l'Ouest; Angers France
| | - Claude Férec
- Université de Brest, Bretagne Occidentale, UFR Médecine; Brest France
- INSERM Unité 1078, CHRU Brest; Brest France
- CHU Brest, Laboratoire de Génétique; Brest France
| | - Cédric Le Maréchal
- Université de Brest, Bretagne Occidentale, UFR Médecine; Brest France
- INSERM Unité 1078, CHRU Brest; Brest France
- CHU Brest, Laboratoire de Génétique; Brest France
| | - Paul Gueguen
- Université de Brest, Bretagne Occidentale, UFR Médecine; Brest France
- INSERM Unité 1078, CHRU Brest; Brest France
- CHU Brest, Laboratoire de Génétique; Brest France
| | - Eric Lippert
- Fédération Hospitalo-Universitaire ‘Grand Ouest Against Leukemia’ (FHU GOAL)
- CHU Brest, Laboratoire d'Hématologie; Brest France
- Université de Brest, Bretagne Occidentale, UFR Médecine; Brest France
- INSERM Unité 1078, CHRU Brest; Brest France
| | - Jean-Christophe Ianotto
- Fédération Hospitalo-Universitaire ‘Grand Ouest Against Leukemia’ (FHU GOAL)
- CHU Brest, Service d'Hématologie Clinique; Brest France
| | - Valérie Ugo
- CHU Angers, Laboratoire d'Hématologie; Angers France
- Université d'Angers, UFR Santé; Angers France
- INSERM Unité 892, CNRS Unit 6299; Angers France
- Fédération Hospitalo-Universitaire ‘Grand Ouest Against Leukemia’ (FHU GOAL)
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Courtier F, Carbuccia N, Garnier S, Guille A, Adélaïde J, Cervera N, Gelsi-Boyer V, Mozziconacci MJ, Rey J, Vey N, Chaffanet M, Birnbaum D, Murati A. Genomic analysis of myeloproliferative neoplasms in chronic and acute phases. Haematologica 2016; 102:e11-e14. [PMID: 27742771 DOI: 10.3324/haematol.2016.152363] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Affiliation(s)
- Frédéric Courtier
- Centre de Recherche en Cancérologie de Marseille, (CRCM), Inserm, U1068, CNRS UMR7258, France.,Institut Paoli-Calmettes (IPC), Département d'Oncologie Moléculaire, UM 105, Marseille, F-13284, France.,Aix-Marseille Université, UM 105, Marseille, F-13284, France
| | - Nadine Carbuccia
- Centre de Recherche en Cancérologie de Marseille, (CRCM), Inserm, U1068, CNRS UMR7258, France.,Institut Paoli-Calmettes (IPC), Département d'Oncologie Moléculaire, UM 105, Marseille, F-13284, France
| | - Séverine Garnier
- Centre de Recherche en Cancérologie de Marseille, (CRCM), Inserm, U1068, CNRS UMR7258, France.,Institut Paoli-Calmettes (IPC), Département d'Oncologie Moléculaire, UM 105, Marseille, F-13284, France
| | - Arnaud Guille
- Centre de Recherche en Cancérologie de Marseille, (CRCM), Inserm, U1068, CNRS UMR7258, France.,Institut Paoli-Calmettes (IPC), Département d'Oncologie Moléculaire, UM 105, Marseille, F-13284, France
| | - José Adélaïde
- Centre de Recherche en Cancérologie de Marseille, (CRCM), Inserm, U1068, CNRS UMR7258, France.,Institut Paoli-Calmettes (IPC), Département d'Oncologie Moléculaire, UM 105, Marseille, F-13284, France
| | - Nathalie Cervera
- Centre de Recherche en Cancérologie de Marseille, (CRCM), Inserm, U1068, CNRS UMR7258, France.,Institut Paoli-Calmettes (IPC), Département d'Oncologie Moléculaire, UM 105, Marseille, F-13284, France
| | - Véronique Gelsi-Boyer
- Centre de Recherche en Cancérologie de Marseille, (CRCM), Inserm, U1068, CNRS UMR7258, France.,Institut Paoli-Calmettes (IPC), Département d'Oncologie Moléculaire, UM 105, Marseille, F-13284, France.,IPC, Département de Biopathologie, Marseille, UM 105, Marseille, F-13284, France.,Aix-Marseille Université, UM 105, Marseille, F-13284, France
| | - Marie-Joelle Mozziconacci
- Centre de Recherche en Cancérologie de Marseille, (CRCM), Inserm, U1068, CNRS UMR7258, France.,Institut Paoli-Calmettes (IPC), Département d'Oncologie Moléculaire, UM 105, Marseille, F-13284, France.,IPC, Département de Biopathologie, Marseille, UM 105, Marseille, F-13284, France
| | - Jérôme Rey
- Centre de Recherche en Cancérologie de Marseille, (CRCM), Inserm, U1068, CNRS UMR7258, France.,IPC, Département d'Hématologie, UM 105, Marseille, F-13284, France.,Aix-Marseille Université, UM 105, Marseille, F-13284, France
| | - Norbert Vey
- Centre de Recherche en Cancérologie de Marseille, (CRCM), Inserm, U1068, CNRS UMR7258, France.,IPC, Département d'Hématologie, UM 105, Marseille, F-13284, France.,Aix-Marseille Université, UM 105, Marseille, F-13284, France
| | - Max Chaffanet
- Centre de Recherche en Cancérologie de Marseille, (CRCM), Inserm, U1068, CNRS UMR7258, France.,Institut Paoli-Calmettes (IPC), Département d'Oncologie Moléculaire, UM 105, Marseille, F-13284, France.,Aix-Marseille Université, UM 105, Marseille, F-13284, France
| | - Daniel Birnbaum
- Centre de Recherche en Cancérologie de Marseille, (CRCM), Inserm, U1068, CNRS UMR7258, France.,Institut Paoli-Calmettes (IPC), Département d'Oncologie Moléculaire, UM 105, Marseille, F-13284, France.,Aix-Marseille Université, UM 105, Marseille, F-13284, France
| | - Anne Murati
- Centre de Recherche en Cancérologie de Marseille, (CRCM), Inserm, U1068, CNRS UMR7258, France .,Institut Paoli-Calmettes (IPC), Département d'Oncologie Moléculaire, UM 105, Marseille, F-13284, France.,IPC, Département de Biopathologie, Marseille, UM 105, Marseille, F-13284, France.,Aix-Marseille Université, UM 105, Marseille, F-13284, France
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20
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Kim Y, Park J, Jo I, Lee GD, Kim J, Kwon A, Choi H, Jang W, Chae H, Han K, Eom KS, Cho BS, Lee SE, Yang J, Shin SH, Kim H, Ko YH, Park H, Jin JY, Lee S, Jekarl DW, Yahng SA, Kim M. Genetic-pathologic characterization of myeloproliferative neoplasms. Exp Mol Med 2016; 48:e247. [PMID: 27444979 PMCID: PMC4973314 DOI: 10.1038/emm.2016.55] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 02/21/2016] [Accepted: 02/22/2016] [Indexed: 12/14/2022] Open
Abstract
Myeloproliferative neoplasms (MPNs) are clonal hematopoietic stem cell disorders characterized by the proliferation of one or more myeloid lineages. The current study demonstrates that three driver mutations were detected in 82.6% of 407 MPNs with a mutation distribution of JAK2 in 275 (67.6%), CALR in 55 (13.5%) and MPL in 6 (1.5%). The mutations were mutually exclusive in principle except in one patient with both CALR and MPL mutations. The driver mutation directed the pathologic features of MPNs, including lineage hyperplasia, laboratory findings and clinical presentation. JAK2-mutated MPN showed erythroid, granulocytic and/or megakaryocytic hyperplasia whereas CALR- and MPL-mutated MPNs displayed granulocytic and/or megakaryocytic hyperplasia. The lineage hyperplasia was closely associated with a higher mutant allele burden and peripheral cytosis. These findings corroborated that the lineage hyperplasia consisted of clonal proliferation of each hematopoietic lineage acquiring driver mutations. Our study has also demonstrated that bone marrow (BM) fibrosis was associated with disease progression. Patients with overt fibrosis (grade ⩾2) presented an increased mutant allele burden (P<0.001), an increase in chromosomal abnormalities (P<0.001) and a poor prognosis (P<0.001). Moreover, among patients with overt fibrosis, all patients with wild-type JAK2/CALR/MPL (triple-negative) showed genomic alterations by genome-wide microarray study and revealed the poorest overall survival, followed by JAK2-mutated MPNs. The genetic–pathologic characteristics provided the information for understanding disease pathogenesis and the progression of MPNs. The prognostic significance of the driver mutation and BM fibrosis suggests the necessity of a prospective therapeutic strategy to improve the clinical outcome.
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Affiliation(s)
- Yonggoo Kim
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Catholic Genetic Laboratory Center, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Joonhong Park
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Catholic Genetic Laboratory Center, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Irene Jo
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Catholic Genetic Laboratory Center, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Gun Dong Lee
- Catholic Genetic Laboratory Center, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jiyeon Kim
- Catholic Genetic Laboratory Center, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Ahlm Kwon
- Catholic Genetic Laboratory Center, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hayoung Choi
- Catholic Genetic Laboratory Center, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Woori Jang
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Catholic Genetic Laboratory Center, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hyojin Chae
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Catholic Genetic Laboratory Center, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Kyungja Han
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Ki-Seong Eom
- Division of Hematology, Department of Internal Medicine, Catholic Blood and Marrow Transplantation Center, Leukemia Research Institute, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Byung-Sik Cho
- Division of Hematology, Department of Internal Medicine, Catholic Blood and Marrow Transplantation Center, Leukemia Research Institute, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Sung-Eun Lee
- Division of Hematology, Department of Internal Medicine, Catholic Blood and Marrow Transplantation Center, Leukemia Research Institute, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jinyoung Yang
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Seung-Hwan Shin
- Department of Internal Medicine, Yeouido St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hyunjung Kim
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Yoon Ho Ko
- Department of Internal Medicine, Uijeongbu St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Haeil Park
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jong Youl Jin
- Division of Hematology/Oncology, Department of Internal Medicine, Bucheon St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Seungok Lee
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Catholic Genetic Laboratory Center, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Dong Wook Jekarl
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Catholic Genetic Laboratory Center, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Seung-Ah Yahng
- Department of Hematology, Incheon St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Myungshin Kim
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Catholic Genetic Laboratory Center, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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21
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Canonical Wnt/β-Catenin Signaling Pathway Is Dysregulated in Patients With Primary and Secondary Myelofibrosis. CLINICAL LYMPHOMA MYELOMA & LEUKEMIA 2016; 16:523-526. [PMID: 27381374 DOI: 10.1016/j.clml.2016.06.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 05/12/2016] [Accepted: 06/01/2016] [Indexed: 11/21/2022]
Abstract
INTRODUCTION β-Catenin is a central effector molecule of the canonical wingless-related integration site (Wnt) signaling pathway. It is important for maintenance of stem cell homeostasis and its aberrant activation has been implicated in a wide array of malignant hematological disorders. There are few reports suggesting its dysregulation in Philadelphia chromosome-negative (Ph-) myeloproliferative neoplasms (MPNs). PATIENTS AND METHODS We analyzed β-catenin mRNA expression in bone marrow (BM) aspirates of 29 patients with primary (PMF) and 4 patients with secondary, post Ph- MPN, myelofibrosis (SMF) using quantitative real-time polymerase chain reaction (qRT PCR). The control group consisted of 16 BM aspirates from patients with limited-stage aggressive non-Hodgkin lymphoma without BM involvement. We compared relative gene expression with clinical and hematological parameters. RESULTS Relative expression of β-catenin differed significantly among groups (P = .0002), it was significantly higher in patients with PMF and SMF than in the control group, but did not differ between patients with PMF and SMF. A negative correlation was found regarding hemoglobin level in PMF (P = .017). No association according to Janus kinase 2 (JAK2) V617F mutational status or JAK2 V617F allele burden was detected. CONCLUSION Our results show for the first time that β-catenin mRNA expression is increased in patients with PMF and SMF and its upregulation might potentiate anemia. A number of inflammatory cytokines associated with PMF are capable of mediating their effects through increased β-catenin expression. Accordingly, β-catenin can induce expression of a number of genes implicated in processes of cell cycle control, fibrosis, and angiogenesis, which are central to the PMF pathogenesis. Therefore, β-catenin might represent an interesting new therapeutic target in these diseases.
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22
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Pratz KW, Koh BD, Patel AG, Flatten KS, Poh W, Herman JG, Dilley R, Harrell MI, Smith BD, Karp JE, Swisher EM, McDevitt MA, Kaufmann SH. Poly (ADP-Ribose) Polymerase Inhibitor Hypersensitivity in Aggressive Myeloproliferative Neoplasms. Clin Cancer Res 2016; 22:3894-902. [PMID: 26979391 DOI: 10.1158/1078-0432.ccr-15-2351] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 02/29/2016] [Indexed: 01/31/2023]
Abstract
PURPOSE DNA repair defects have been previously reported in myeloproliferative neoplasms (MPN). Inhibitors of PARP have shown activity in solid tumors with defects in homologous recombination (HR). This study was performed to assess MPN sensitivity to PARP inhibitors ex vivo EXPERIMENTAL DESIGN HR pathway integrity in circulating myeloid cells was evaluated by assessing the formation of RAD51 foci after treatment with ionizing radiation or PARP inhibitors. Sensitivity of MPN erythroid and myeloid progenitors to PARP inhibitors was evaluated using colony formation assays. RESULTS Six of 14 MPN primary samples had reduced formation of RAD51 foci after exposure to ionizing radiation, suggesting impaired HR. This phenotype was not associated with a specific MPN subtype, JAK2 mutation status, or karyotype. MPN samples showed increased sensitivity to the PARP inhibitors veliparib and olaparib compared with normal myeloid progenitors. This hypersensitivity, which was most pronounced in samples deficient in DNA damage-induced RAD51 foci, was observed predominantly in samples from patients with diagnoses of chronic myelogenous leukemia, chronic myelomonocytic leukemia, or unspecified myelodysplastic/MPN overlap syndromes. CONCLUSIONS Like other neoplasms with HR defects, MPNs exhibit PARP inhibitor hypersensitivity compared with normal marrow. These results suggest that further preclinical and possibly clinical study of PARP inhibitors in MPNs is warranted. Clin Cancer Res; 22(15); 3894-902. ©2016 AACR.
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Affiliation(s)
- Keith W Pratz
- Department of Oncology and the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins University, Baltimore, Maryland.
| | - Brian D Koh
- Department of Oncology, Mayo Clinic, Rochester, Minnesota
| | - Anand G Patel
- Department of Molecular Pharmacology & Experimental Therapeutics, Mayo Clinic, Rochester, Minnesota
| | | | - Weijie Poh
- Department of Oncology and the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins University, Baltimore, Maryland
| | - James G Herman
- Division of Hematology/Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania
| | - Robert Dilley
- Department of Oncology and the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins University, Baltimore, Maryland
| | - Maria I Harrell
- Department of Obstetrics & Gynecology, University of Washington School of Medicine, Seattle, Washington
| | - B Douglas Smith
- Department of Oncology and the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins University, Baltimore, Maryland
| | - Judith E Karp
- Department of Oncology and the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins University, Baltimore, Maryland
| | - Elizabeth M Swisher
- Department of Obstetrics & Gynecology, University of Washington School of Medicine, Seattle, Washington
| | - Michael A McDevitt
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Scott H Kaufmann
- Department of Oncology, Mayo Clinic, Rochester, Minnesota. Department of Molecular Pharmacology & Experimental Therapeutics, Mayo Clinic, Rochester, Minnesota
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23
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Sorigué M, Ribera JM, García O, Cabezón M, Vélez P, Marcé S, Xicoy B, Fernández C, Buch J, Cortes M, Plensa E, Gallardo D, Boqué C, Feliu E, Zamora L. Highly variable mutational profile of ASXL1 in myelofibrosis. Eur J Haematol 2016; 97:331-5. [PMID: 26714837 DOI: 10.1111/ejh.12731] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/25/2015] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Somatic mutations in ASXL1 seem to have a negative prognostic impact in patients with several myeloid neoplasms, including myelofibrosis (MF). The aim of this work was to determine the prevalence and profile of ASXL1 mutations in MF. METHODS We analyzed mutations in ASXL1 in 70 consecutive MF patients from 8 Spanish hospitals by means of Sanger sequencing, as well as JAK2, CALR, and MPL mutations. RESULTS ASXL1 mutations were found in 16/70 (23%) of cases, most commonly p.Gly646TrpfsX12 (5/16). Most mutations (13/16) were frameshift mutations. Of 54 ASXL1- wild-type patients, 32 (59%) had at least one single nucleotide polymorphism (SNP), 27 of them had g.78128C>T, g.79017A>C, and g.79085T>C [triple SNP (TSNP) patients]. The 5-yr overall survival probability of TSNP patients was 67% (95% CI, 43-91%) vs. 90% (95% CI, 77-100%) in ASXL1-WT patients (P = 0.152). CONCLUSION ASXL1 mutations were found in 23% of cases, p.Gly646TrpfsX12 being the most frequent. About 85% of mutations were found only in individual cases and 46% had not previously been reported, a pattern also seen in other series. Fifty percent of ASXL1-WT patients had a combination of three specific SNPs that might have a prognostic correlation that needs to be determined in larger series.
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Affiliation(s)
- Marc Sorigué
- Department of Hematology, Hospital Germans Trias i Pujol, Universitat Autonoma de Barcelona, Badalona, Spain.
| | - Josep-Maria Ribera
- ICO-Hospital Germans Trias i Pujol, Josep Carreras Leukemia Research Institute, Universitat Autonoma de Barcelona, Badalona, Spain
| | - Olga García
- ICO-Hospital Germans Trias i Pujol, Josep Carreras Leukemia Research Institute, Universitat Autonoma de Barcelona, Badalona, Spain
| | - Marta Cabezón
- ICO-Hospital Germans Trias i Pujol, Josep Carreras Leukemia Research Institute, Universitat Autonoma de Barcelona, Badalona, Spain
| | - Patricia Vélez
- ICO-Hospital Duran i Reynals, Hospitalet del Llobregat, Catalonia, Spain
| | - Silvia Marcé
- ICO-Hospital Germans Trias i Pujol, Josep Carreras Leukemia Research Institute, Universitat Autonoma de Barcelona, Badalona, Spain
| | - Blanca Xicoy
- ICO-Hospital Germans Trias i Pujol, Josep Carreras Leukemia Research Institute, Universitat Autonoma de Barcelona, Badalona, Spain
| | | | - Joan Buch
- Hospital Sant Jaume de Calella, Girona, Spain
| | | | | | | | - Concepción Boqué
- ICO-Hospital Duran i Reynals, Hospitalet del Llobregat, Catalonia, Spain
| | - Evarist Feliu
- ICO-Hospital Germans Trias i Pujol, Josep Carreras Leukemia Research Institute, Universitat Autonoma de Barcelona, Badalona, Spain
| | - Lurdes Zamora
- ICO-Hospital Germans Trias i Pujol, Josep Carreras Leukemia Research Institute, Universitat Autonoma de Barcelona, Badalona, Spain
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24
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Inflammation as a Keystone of Bone Marrow Stroma Alterations in Primary Myelofibrosis. Mediators Inflamm 2015; 2015:415024. [PMID: 26640324 PMCID: PMC4660030 DOI: 10.1155/2015/415024] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 10/08/2015] [Accepted: 10/15/2015] [Indexed: 01/11/2023] Open
Abstract
Primary myelofibrosis (PMF) is a clonal myeloproliferative neoplasm where severity as well as treatment complexity is mainly attributed to a long lasting disease and presence of bone marrow stroma alterations as evidenced by myelofibrosis, neoangiogenesis, and osteosclerosis. While recent understanding of mutations role in hematopoietic cells provides an explanation for pathological myeloproliferation, functional involvement of stromal cells in the disease pathogenesis remains poorly understood. The current dogma is that stromal changes are secondary to the cytokine “storm” produced by the hematopoietic clone cells. However, despite therapies targeting the myeloproliferation-sustaining clones, PMF is still regarded as an incurable disease except for patients, who are successful recipients of allogeneic stem cell transplantation. Although the clinical benefits of these inhibitors have been correlated with a marked reduction in serum proinflammatory cytokines produced by the hematopoietic clones, further demonstrating the importance of inflammation in the pathological process, these treatments do not address the role of the altered bone marrow stroma in the pathological process. In this review, we propose hypotheses suggesting that the stroma is inflammatory-imprinted by clonal hematopoietic cells up to a point where it becomes “independent” of hematopoietic cell stimulation, resulting in an inflammatory vicious circle requiring combined stroma targeted therapies.
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25
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Molecular characterization of acute erythroid leukemia (M6-AML) using targeted next-generation sequencing. Leukemia 2015. [PMID: 26202927 DOI: 10.1038/leu.2015.198] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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26
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Correlation of mutation profile and response in patients with myelofibrosis treated with ruxolitinib. Blood 2015; 126:790-7. [PMID: 26124496 DOI: 10.1182/blood-2015-03-633404] [Citation(s) in RCA: 149] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 06/22/2015] [Indexed: 12/20/2022] Open
Abstract
Although most patients with myelofibrosis (MF) derive benefit from ruxolitinib, some are refractory, have a suboptimal response, or quickly lose their response. To identify genes that may predict response to ruxolitinib, we performed targeted next-generation sequencing (NGS) of a panel of 28 genes recurrently mutated in hematologic malignancies in a cohort of patients with MF who were treated with ruxolitinib in a phase 1/2 study. We also tested for CALR deletions by standard polymerase chain reaction methods. Ninety-eight percent of patients had a mutation in ≥1 gene. Seventy-nine (82.1%) patients had the JAK2(V617F) mutation, 9 (9.5%) had CALR mutations (7 type 1, 2 type 2), 3 (3.1%) had MPL mutations, and 4 (4.2%) were negative for all 3. ASXL1/JAK2 and TET2/JAK2 were the most frequently comutated genes. Mutations in NRAS, KRAS, PTPN11, GATA2, TP53, and RUNX1 were found in <5% of patients. Spleen response (≥50% reduction in palpable spleen size) was inversely correlated with the number of mutations; patients with ≤2 mutations had ninefold higher odds of a spleen response than those with ≥3 mutations (odds ratio = 9.37; 95% confidence interval, 1.86-47.2). Patients with ≥3 mutations also had a shorter time to treatment discontinuation and shorter overall survival than those with fewer mutations. In multivariable analysis, only number of mutations and spleen response remained associated with time to treatment discontinuation. Patients with ≥3 mutations had the worst outcomes, suggesting that multigene profiling may be useful for therapeutic planning for MF.
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27
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An W, Wan Y, Guo Y, Chen X, Ren Y, Zhang J, Chang L, Wei W, Zhang P, Zhu X. CALR mutation screening in pediatric primary myelofibrosis. Pediatr Blood Cancer 2014; 61:2256-62. [PMID: 25176567 DOI: 10.1002/pbc.25211] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 07/11/2014] [Indexed: 01/20/2023]
Abstract
BACKGROUND Primary myelofibrosis (PMF) is quite rare in children. Mutations of JAK2(V617F) or MPL(W515K/L) were absent in pediatric patients with PMF according to previous studies. Recently, mutations in calreticulin (CALR) were described in adult patients with JAK2/MPL-unmutated PMF. Our study aimed to analyze the clinical and genetic features of Chinese pediatric patients with PMF. PROCEDURES We retrospectively investigated 14 pediatric patients diagnosed as PMF according to WHO 2008 criteria. Direct sequencing was performed for the existence of genetic alterations in JAK2, MPL, TET2, CBL, ASXL1, IDH1, IDH2, SRSF2, EZH2, DNMT3A and CALR. RESULTS In our cohort, all patients had anemia, three patients (21%) had splenomegaly, six patients (43%) had micromegakaryocytes at time of diagnosis. No patient had spontaneous remission and six patients (43%) transformed to acute myelocytic leukemia. In nine patients with evaluable cytogenetic information, three subjects (33%) had abnormal karyotypes. The median survival from time of diagnosis was 28 months. Seven patients (50%) had type 2 mutations of CALR. No patient had mutations in the other candidate genes. There was no statistical differences in age, gender, hemoglobin, WBC, neutrophil and platelet counts, percentage of circulating blast, overall survival and leukemia transformation between patients with and without CALR mutation. CONCLUSION Our study documented that Chinese pediatric patients with PMF in our cohort had its own clinical characteristics and poor outcome. CALR mutations were detected in 50% of our pediatric patients with PMF. Based on our study, CALR mutations screening could be used as molecular marker for diagnosis of pediatric patients with PMF.
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Affiliation(s)
- Wenbin An
- Pediatric Blood Diseases Centre, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China; State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
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McMahon M, Contreras A, Ruggero D. Small RNAs with big implications: new insights into H/ACA snoRNA function and their role in human disease. WILEY INTERDISCIPLINARY REVIEWS-RNA 2014; 6:173-89. [PMID: 25363811 DOI: 10.1002/wrna.1266] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 07/25/2014] [Accepted: 08/07/2014] [Indexed: 12/26/2022]
Abstract
A myriad of structurally and functionally diverse noncoding RNAs (ncRNAs) have recently been implicated in numerous human diseases including cancer. Small nucleolar RNAs (snoRNAs), the most abundant group of intron-encoded ncRNAs, are classified into two families (box C/D snoRNAs and box H/ACA snoRNAs) and are required for post-transcriptional modifications on ribosomal RNA (rRNA). There is now a growing appreciation that nucleotide modifications on rRNA may impart regulatory potential to the ribosome; however, the functional consequence of site-specific snoRNA-guided modifications remains poorly defined. Discovered almost 20 years ago, H/ACA snoRNAs are required for the conversion of specific uridine residues to pseudouridine on rRNA. Interestingly, recent reports indicate that the levels of subsets of H/ACA snoRNAs required for pseudouridine modifications at specific sites on rRNA are altered in several diseases, particularly cancer. In this review, we describe recent advances in understanding the downstream consequences of H/ACA snoRNA-guided modifications on ribosome function, discuss the possible mechanism by which H/ACA snoRNAs may be regulated, and explore prospective expanding functions of H/ACA snoRNAs. Furthermore, we discuss the potential biological implications of alterations in H/ACA snoRNA expression in several human diseases.
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Affiliation(s)
- Mary McMahon
- School of Medicine and Department of Urology, Helen Diller Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
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Federmann B, Abele M, Rosero Cuesta DS, Vogel W, Boiocchi L, Kanz L, Quintanilla-Martinez L, Orazi A, Bonzheim I, Fend F. The detection of SRSF2 mutations in routinely processed bone marrow biopsies is useful in the diagnosis of chronic myelomonocytic leukemia. Hum Pathol 2014; 45:2471-9. [PMID: 25305095 DOI: 10.1016/j.humpath.2014.08.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Revised: 08/21/2014] [Accepted: 08/24/2014] [Indexed: 11/25/2022]
Abstract
Diagnosis of chronic myelomonocytic leukemia (CMML) is based on a combination of clinical, laboratory, and morphological parameters, including persistent peripheral blood monocytosis. Recently, mutations of serine/arginine-rich splicing factor 2 (SRSF2) have been identified in 40% to 50% of CMMLs and occasionally in other myeloid disorders. In this study, we established a robust assay for the detection of SRSF2 mutations in decalcified, paraffin-embedded bone marrow (BM) biopsies and investigated its diagnostic utility. BM biopsies of 78 patients with myeloid neoplasms, including 36 CMMLs, 22 myelodysplastic syndromes (MDS), and 20 Ph- myeloproliferative neoplasms (MPN) were analyzed. The region around hot spot P95 in exon 1 of SRSF2 was amplified and bidirectionally sequenced. In addition, a restriction fragment length polymorphism analysis was established. The JAK2 V617F mutation was investigated by allele-specific polymerase chain reaction. SRSF2 mutations were identified in 16 (44%) of 36 CMMLs, including 1 of 3 cases with associated systemic mastocytosis, 4 (20%) of 20 Ph- MPN, and 1 (4.5%) of 22 MDS. Restriction fragment length polymorphism analysis detected all mutations with the exception of a single P95A. Of note, 2 cases of JAK2 V617F+ primary myelofibrosis with SRSF2 mutation initially were diagnosed as CMML based on significant peripheral blood monocytosis. In CMML, no correlation with histopathology and/or clinical parameters was observed, but SRSF2 mutations were associated with normal karyotype (P < .001). In summary, SRSF2 mutations are frequent in CMML and a useful diagnostic feature demonstrable in BM biopsies, allowing a definitive diagnosis for cases with minimal dysplasia and normal karyotype. The role of SRSF2 mutations in cases with hybrid features between primary myelofibrosis and CMML needs further investigation.
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Affiliation(s)
- Birgit Federmann
- Institute of Pathology and Neuropathology Comprehensive Cancer Center Tuebingen and University of Tuebingen, 72076 Tuebingen, Germany
| | - Manuel Abele
- Institute of Pathology and Neuropathology Comprehensive Cancer Center Tuebingen and University of Tuebingen, 72076 Tuebingen, Germany
| | - David Santiago Rosero Cuesta
- Institute of Pathology and Neuropathology Comprehensive Cancer Center Tuebingen and University of Tuebingen, 72076 Tuebingen, Germany; Department of Pathology, Hospital Universitario Miguel Servet, 50001 Zaragoza, Spain
| | - Wichard Vogel
- Department of Internal Medicine, Hematology and Oncology, Comprehensive Cancer Center Tuebingen and University of Tuebingen, 72076 Tuebingen, Germany
| | - Leonardo Boiocchi
- Department of Molecular and Translational Medicine, Pathology Section, University of Brescia, 25100 Brescia, Italy
| | - Lothar Kanz
- Department of Pathology, Hospital Universitario Miguel Servet, 50001 Zaragoza, Spain
| | - Leticia Quintanilla-Martinez
- Institute of Pathology and Neuropathology Comprehensive Cancer Center Tuebingen and University of Tuebingen, 72076 Tuebingen, Germany
| | - Attilio Orazi
- Department of Pathology and Laboratory Medicine, Weill Cornell Medical College/New York Presbyterian Hospital, 10065 NY, USA
| | - Irina Bonzheim
- Institute of Pathology and Neuropathology Comprehensive Cancer Center Tuebingen and University of Tuebingen, 72076 Tuebingen, Germany
| | - Falko Fend
- Institute of Pathology and Neuropathology Comprehensive Cancer Center Tuebingen and University of Tuebingen, 72076 Tuebingen, Germany.
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Mills KI, McMullin MF. Mutational spectrum defines primary and secondary myelofibrosis. Haematologica 2014; 99:2-3. [PMID: 24425686 DOI: 10.3324/haematol.2013.101279] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Structural context of disease-associated mutations and putative mechanism of autoinhibition revealed by X-ray crystallographic analysis of the EZH2-SET domain. PLoS One 2013; 8:e84147. [PMID: 24367637 PMCID: PMC3868555 DOI: 10.1371/journal.pone.0084147] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Accepted: 11/12/2013] [Indexed: 01/16/2023] Open
Abstract
The enhancer-of-zeste homolog 2 (EZH2) gene product is an 87 kDa polycomb group (PcG) protein containing a C-terminal methyltransferase SET domain. EZH2, along with binding partners, i.e., EED and SUZ12, upon which it is dependent for activity forms the core of the polycomb repressive complex 2 (PRC2). PRC2 regulates gene silencing by catalyzing the methylation of histone H3 at lysine 27. Both overexpression and mutation of EZH2 are associated with the incidence and aggressiveness of various cancers. The novel crystal structure of the SET domain was determined in order to understand disease-associated EZH2 mutations and derive an explanation for its inactivity independent of complex formation. The 2.00 Å crystal structure reveals that, in its uncomplexed form, the EZH2 C-terminus folds back into the active site blocking engagement with substrate. Furthermore, the S-adenosyl-L-methionine (SAM) binding pocket observed in the crystal structure of homologous SET domains is notably absent. This suggests that a conformational change in the EZH2 SET domain, dependent upon complex formation, must take place for cofactor and substrate binding activities to be recapitulated. In addition, the data provide a structural context for clinically significant mutations found in the EZH2 SET domain.
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