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2023 Fiscal Year Final Research Report

Analysis of lipid factors driving post-lysosomal signaling.

Planned Research

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Project AreaPost-lysosome: Understanding of Higher-order Biological Processes initiated by the site of degradation
Project/Area Number 21H05146
Research Category

Grant-in-Aid for Transformative Research Areas (B)

Allocation TypeSingle-year Grants
Review Section Transformative Research Areas, Section (III)
Research InstitutionThe University of Tokyo

Principal Investigator

Nishimura Taki  東京大学, 大学院医学系研究科(医学部), 特任講師 (70552991)

Co-Investigator(Kenkyū-buntansha) 大場 陽介  慶應義塾大学, 薬学部(芝共立), 講師 (90968603)
永沼 達郎  北海道大学, 薬学研究院, 助教 (60779619)
Project Period (FY) 2021-08-23 – 2024-03-31
Keywordsポストリソソーム / 脂質 / オートファジー
Outline of Final Research Achievements

This project aimed to address the key factors responsible for lysosome-derived longevity signals in lysosome-degraded lipid metabolites and lysosomal membrane lipids. A vertebrate model organism, killifish, and cultured cell systems with enhanced lipid supply from lysosomes have been established. Comprehensive lipidomics analysis of these, along with morphological observations using electron microscopy, revealed that enhanced lipid supply from lysosomes not only dramatically changes lipid metabolism in the liver, but also alters the aging phenomena of the killifish. Additionally, we succeeded in producing a new lipid probe that could serve as a highly useful analytical tool in future studies of post-lysosomal signaling.

Free Research Field

脂質生物学

Academic Significance and Societal Importance of the Research Achievements

本研究課題を通して、線虫などの無脊椎動物を用いた研究から見出されたリソソームを起点とする脂質分解依存的な寿命制御シグナルが、キリフィッシュなどの脊椎動物にも保存されていることが分かってきた。さらに、関連する脂質代謝産物は線虫とキリフィッシュでは一部異なっており、寿命制御に関わる未知の脂質代謝シグナル経路が存在する可能性が考えられた。本研究はまだ萌芽的なステージではあるものの、学術的に新たな脂質研究分野、および寿命研究分野の創成に繋がる興味深い知見であるとともに、超高齢化社会という喫緊の課題の解決の糸口にもなり得る研究成果であると考えられる。

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Published: 2025-01-30  

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