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2021 Fiscal Year Final Research Report

New method for establishing self-renewing megakaryocyte cell lines using iPS cells

Research Project

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Project/Area Number 18K18365
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 90110:Biomedical engineering-related
Research InstitutionKyoto University

Principal Investigator

Nakamura Sou  京都大学, iPS細胞研究所, 特定拠点助教 (50769833)

Project Period (FY) 2018-04-01 – 2022-03-31
Keywords巨核球 / iPS細胞
Outline of Final Research Achievements

RNA-seq analysis of several megakaryocyte cell lines displaying different proliferative capabilities enabled to identify the responsible genes that inhibit self-renewal ability in megakaryocyte cell lines. Furthermore, alternative vector system was applied to generate megakaryocyte cell lines, whereby epigenetic modifications were silenced at the stage of hematopoietic cell differentiation from pluripotent stem cells. Such improvements allowed us to generate megakaryocyte cell lines from several human iPS cell clones, contributing to high efficiency of megakaryocyte cell line induction.

Free Research Field

幹細胞 再生医療

Academic Significance and Societal Importance of the Research Achievements

同種免疫性の血小板輸血不応症を発症する患者では、HLA/HPAが適合するドナーの確保が必要であるが、稀な型の場合や緊急時は供給不足が危惧される。解決策として、申請者らは、iPS細胞から分化誘導した血小板前駆細胞、巨核球を細胞株化し、産業化可能な血小板製造法を確立したが、安定増殖株の樹立効率が低いことが課題となっていた。本研究で明らかとなった巨核球細胞株自己複製抑制機構を解除する方法を新規ベクターシステムに新たに組み込むことで、個性の異なる複数のiPS細胞クローン由来不死化巨核球の作製効率を飛躍的に改善することができるため、HLA/HPA一致血小板製剤供給源の問題点を解決する可能性が提示できた。

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Published: 2023-01-30  

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