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2023 Fiscal Year Final Research Report

Selective autophagy-mediated cellular regulations

Planned Research

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Project AreaMultimode autophagy: Diverse pathways and selectivity
Project/Area Number 19H05706
Research Category

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Allocation TypeSingle-year Grants
Review Section Biological Sciences
Research InstitutionJuntendo University

Principal Investigator

Komatsu Masaaki  順天堂大学, 大学院医学研究科, 教授 (90356254)

Co-Investigator(Kenkyū-buntansha) 和栗 聡  福島県立医科大学, 医学部, 教授 (30244908)
杉浦 悠毅  京都大学, 医学研究科, 特定准教授 (30590202)
李 賢哲  順天堂大学, 医学部, 准教授 (30758321)
Project Period (FY) 2019-06-28 – 2024-03-31
Keywordsオートファジー / 液―液相分離 / 選択的オートファジー / p62 / 液滴
Outline of Final Research Achievements

Liver-specific selective autophagy-incompetent mice were generated by utilizing a probe that specifically binds to the membrane-bound ATG8 family. We found that overexpression of NBR1, a binding partner of p62, decreased the fluidity of p62 bodies while increasing their number and size. We established a method for highly efficient purification of fluorescently labeled p62 bodies using a cell sorter. Integrative proteomic analysis of p62 bodies purified from NBR1 overexpressing cells and liver-specific selective autophagy-incompetent mouse liver identified a novel selective autophagy substrates that localize to p62 bodies and are degraded by autophagy.

Free Research Field

細胞生物学

Academic Significance and Societal Importance of the Research Achievements

RNAが中心的な役割を演じる核内相分離と異なり、タンパク質の多価相互作用によって駆動される細胞質相分離は、十分な解析がなされていない。本研究による細胞質液滴p62 bodyの形成、制御、分解機構の精緻な解析は、細胞生物学における液―液相分離の新基軸を生み出し、世界の関連研究を強く牽引すると考えられる。p62 bodyによる生体防御系の異常は、直接的に病態発症、特に代謝性疾患やがんに関与することが明らかになっており、さらなる本研究の推進によりヒトの健康増進や疾患予防に繋がることが期待される。

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Published: 2025-01-30  

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