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2022 Fiscal Year Final Research Report

Elucidation of Fibrosis Regulation Mechanisms by Damage-Associated Molecular Patterns

Research Project

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Project/Area Number 21K15465
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 49070:Immunology-related
Research InstitutionThe University of Tokyo

Principal Investigator

Hangai Sho  東京大学, 先端科学技術研究センター, 客員研究員 (50785350)

Project Period (FY) 2021-04-01 – 2023-03-31
Keywordsダメージ関連分子パターン / 造血幹細胞 / HMGB1
Outline of Final Research Achievements

HMGB1 is known to be an important gene in ontogeny process and has been suggested to play a role in tissue stem cell homeostasis. However, its detailed function has not been elucidated yet. In this study, we show that HMGB1 contributes to hematopoietic stem cell (HSC) homeostasis. Mechanistically, we propose that HMGB1 contributes to HSC homeostasis by regulating the expression of stemness- and cell cycle-related genes in addition to regulating DNA repair response pathway. Furthermore, HMGB1 was found to play an important role in the proliferation of leukemic stem cells in a mouse model of chronic myelogenous leukemia.

Free Research Field

免疫学

Academic Significance and Societal Importance of the Research Achievements

HMGB1は細胞がダメージを受けた際に放出され炎症・免疫応答を惹起するdamage-associated molecular patternsの一つとして近年研究が進んでいたが、個体発生においても重要な役割を果たすことが示唆されていた。しかしながら詳細は機能は不明であり、特に組織幹細胞における役割については個体レベルでの解析は全くなされていなかった。本研究はHMGB1の造血幹細胞の恒常性維持における役割を初めて明らかにした点で画期的である。さらにHMGB1が慢性骨髄性白血病の病態形成において重要でありかつ治療標的となりうることを示した点で意義のあるものと言える。

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Published: 2024-01-30  

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