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2019 Fiscal Year Final Research Report

Clonal development of hematopoietic progenitor cells with driver mutation in myeloproliferative neoplasms

Research Project

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Project/Area Number 18K16120
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 54010:Hematology and medical oncology-related
Research InstitutionKurume University

Principal Investigator

Miyawaki Kohta  久留米大学, 医学部, 研究員 (50774709)

Project Period (FY) 2018-04-01 – 2020-03-31
Keywords巨核球前駆細胞 / 本態性血小板増多症 / 骨髄増殖性腫瘍 / CHIP / ドライバー変異 / シングルセル
Outline of Final Research Achievements

Recent studies revealed that driver mutations of hematologic malignancies could be found in white blood cells in healthy individuals, what we call “CHIP.” The existence of CHIP suggested that driver mutation itself is not sufficient, and some additional factors should be required for leukemogenesis. To address the background mechanisms of this, we analyzed JAK2 mutation clones in bone marrow from essential thrombocythemia patients and healthy individuals. We first identified prospectively-isolatable and functionally homogeneous human megakaryocyte progenitor. By performing comparative analysis in hematopoietic stem/progenitor populations, including MegP, we identified several key factors that potentially contribute to the acquisition of growth advantage for JAK2 mutant clones.

Free Research Field

造血器腫瘍

Academic Significance and Societal Importance of the Research Achievements

CHIPの存在は昨今の血液学の発見の中でも極めてインパクトの大きいものであり、CHIPからの腫瘍化のメカニズムの解明は現在重要な課題となっている。すなわち、CHIPの獲得は加齢現象として避けることは難しいが、腫瘍化のメカニズムが解明されれば、CHIPの他にどのような因子を有している人間が腫瘍化しやすいのか、というリスク因子が明らかになり、腫瘍化に必要な因子を標的にすることで効果的な新規治療戦略開発が可能になる。このように、本研究内容は、腫瘍の病態メカニズムの解明にとどまらず、予防医学・治療医学など造血器腫瘍に対して多面的に貢献することが期待される。

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Published: 2021-02-19  

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