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Mizumaki H, Tran DC, Hosokawa K, Hosomichi K, Zaimoku Y, Takamatsu H, Yamazaki H, Ishiyama K, Yamazaki R, Fujiwara H, Tajima A, Nakao S. Minor GPI(-) granulocyte populations in aplastic anemia and healthy individuals derived from a few PIGA-mutated hematopoietic stem progenitor cells. Blood Cancer J 2023; 13:165. [PMID: 37938545 PMCID: PMC10632376 DOI: 10.1038/s41408-023-00932-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 09/08/2023] [Accepted: 09/15/2023] [Indexed: 11/09/2023] Open
Affiliation(s)
- Hiroki Mizumaki
- Department of Hematology, Faculty of Medicine, Institute of Medical Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Dung Cao Tran
- Department of Hematology, Faculty of Medicine, Institute of Medical Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Kohei Hosokawa
- Department of Hematology, Faculty of Medicine, Institute of Medical Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Kazuyoshi Hosomichi
- Department of Bioinformatics and Genomics, Graduate School of Advanced Preventive Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Yoshitaka Zaimoku
- Department of Hematology, Faculty of Medicine, Institute of Medical Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Hiroyuki Takamatsu
- Department of Hematology, Faculty of Medicine, Institute of Medical Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Hirohito Yamazaki
- Division of Transfusion Medicine, Kanazawa University Hospital, Kanazawa, Japan
| | - Ken Ishiyama
- Department of Hematology, Faculty of Medicine, Institute of Medical Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Rena Yamazaki
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Hiroshi Fujiwara
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Atsushi Tajima
- Department of Bioinformatics and Genomics, Graduate School of Advanced Preventive Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Shinji Nakao
- Department of Hematology, Faculty of Medicine, Institute of Medical Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan.
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Lobry C, Bains A, Zamechek LB, Ibrahim S, Aifantis I, Araten DJ. Analysis of TET2 mutations in paroxysmal nocturnal hemoglobinuria (PNH). Exp Hematol Oncol 2019; 8:17. [PMID: 31453016 PMCID: PMC6702710 DOI: 10.1186/s40164-019-0142-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 08/01/2019] [Indexed: 12/18/2022] Open
Abstract
Background Large clonal populations of cells bearing PIG-A mutations are the sine qua non of PNH, but the PIG-A mutation itself is insufficient for clonal expansion. The association between PNH and aplastic anemia supports the immune escape model, but not all PNH patients demonstrate a history of aplasia; therefore, second genetic hits driving clonal expansion have been postulated. Based on the previous identification of JAK2 mutations in patients with a myeloproliferative/PNH overlap syndrome, we considered TET2 as a candidate gene in which mutations might be contributing to clonal expansion. Methods Here we sequenced the TET2 and JAK2 genes in 19 patients with large PNH clones. Results We found one patient with a novel somatic nonsense mutation in TET2 in multiple hematopoietic lineages, which was detectable upon repeat testing. This patient has had severe thromboses and has relatively higher peripheral blood counts compared with the other patients—but does not have other features of a myeloproliferative neoplasm. Conclusions We conclude that mutations in TET2 may contribute to clonal expansion in exceptional cases of PNH.
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Affiliation(s)
- Camille Lobry
- 1Institut National de la Santé et de la Recherche Medicale (INSERM) U1170, Institut Gustave Roussy, 94805 Villejuif, France
| | - Ashish Bains
- 2Pathology and Laboratory Medicine, Temple University, 3401 North Broad Street, Philadelphia, PA 19140 USA
| | - Leah B Zamechek
- 3Columbia University Medical Center, 1130 St. Nicholas Avenue, Room 901, New York City, USA
| | - Sherif Ibrahim
- Cairo Diagnostics, 244 Westchester Avenue, West Harrison, NY 10604 USA
| | - Iannis Aifantis
- 5Department of Pathology, NYU School of Medicine, 550 First Avenue, New York, NY 10016 USA
| | - David J Araten
- 6Division of Hematology, Laura and Isaac Perlmutter Cancer Center, NYU Langone Health and the NYU School of Medicine, 240 East 38th Street, 19th Floor, New York, NY 10016 USA.,7Division of Hematology, New York VA Medical Center, 423 East 23rd Street, New York, NY 10010 USA
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