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Investigation of the role of autophagy in Neuronal Ceroid Lipofuscinoses

Research Project

Project/Area Number 21K15198
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 46020:Anatomy and histopathology of nervous system-related
Research InstitutionJuntendo University

Principal Investigator

Junji Yamaguchi  順天堂大学, 大学院医学研究科, 助教 (30875282)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2022: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
KeywordsカテプシンD / オートファジー / p62 / リソソーム / Atg7
Outline of Research at the Start

神経性セロイドリポフスチン症(NCL)の神経細胞内にはリポフスチン顆粒を有する異常リソソームが蓄積する。これまでの予備実験の結果から、異常リソソームは選択的オートファジーにより処理されている可能性が示唆された。本研究では、NCLにおけるオートファジーの役割を明らかにすることを目的に、NCLモデルマウスとオートファジー機能不全マウスの中枢神経系特異的両欠損マウス(CTSD/Atg7 Nestin Cre)を作成して、オートファジー機能不全条件下におけるNCL病態変化について解析する。また、本研究課題ではCTSD欠損神経細胞内に蓄積する異常リソソームの経時的変化についても併せて解析を進める。

Outline of Final Research Achievements

It has been reported that autophagy is closely involved in pathogenesis of neuronal ceroid lipofuscin (NCL), however, its details remain unknown. In this research, using cathepsin D (CTSD)-deficient mice, one type of NCL model mice, we showed that abnormal lysosomes with degenerated membranes were degraded by selective autophagy. Furthermore, to investigate the role of autophagy in CTSD-deficient mice, we generated the central nerve tissue specific CTSD/ Atg7-double deficient mice, NCL model mice impaired autophagy. In these mice, there were few abnormal lysosomes surrounded by autophagic vacuoles. However, we found that some of lysosomes were captured into p62 bodies formed by the impaired autophagic machinery. These results are important for investigating the degeneration and degraded mechanism of lysosomes in vivo, and useful for understanding of detailed NCL pathogenesis.

Academic Significance and Societal Importance of the Research Achievements

リソソームは細胞内の不要物質を分解する重要なオルガネラであり、リソソーム蓄積症をはじめ多くの疾患に関与する。近年、リソソーム自身も損傷を受けた際に選択的オートファジーの標的になることが示されているが、生体内における詳細な機構は未だ多くはわかっていない。CTSD欠損マウス神経細胞内では上記の現象が散見され、生体内におけるリソソームの損傷や修復を理解する上で重要なモデルとなることが分かった。また、NCL病態内で見られる異常リソソームは膜の変性が生じた後にp62やNBR1を介した選択的オートファジーによって処理される可能性を示した。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (11 results)

All 2023 2022 2021

All Journal Article (9 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 9 results,  Open Access: 7 results) Presentation (2 results)

  • [Journal Article] Recent advances in in-resin correlative light and electron microscopy of Epon-embedded cells2023

    • Author(s)
      Tanida Isei, Yamaguchi Junji, Suzuki Chigure, Kakuta Soichiro, Uchiyama Yasuo
    • Journal Title

      Microscopy

      Volume: 72 Issue: 5 Pages: 383-387

    • DOI

      10.1093/jmicro/dfad028

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Application of immuno- and affinity labeling with fluorescent dyes to in-resin CLEM of Epon-embedded cells2023

    • Author(s)
      Tanida Isei, Yamaguchi Junji, Suzuki Chigure, Kakuta Soichiro, Uchiyama Yasuo
    • Journal Title

      Heliyon

      Volume: 9 Issue: 6 Pages: e17394-e17394

    • DOI

      10.1016/j.heliyon.2023.e17394

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] TUNEL‐positive structures in activated microglia and SQSTM1/p62‐positive structures in activated astrocytes in the neurodegenerative brain of a CLN10 mouse model2023

    • Author(s)
      Mitsui Shun, Yamaguchi Junji, Suzuki Chigure, Uchiyama Yasuo, Tanida Isei
    • Journal Title

      Glia

      Volume: 71 Issue: 12 Pages: 2753-2769

    • DOI

      10.1002/glia.24449

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] In-resin CLEM of Epon-embedded cells using proximity labeling2022

    • Author(s)
      Sanada Takahito、Yamaguchi Junji、Furuta Yoko、Kakuta Soichiro、Tanida Isei、Uchiyama Yasuo
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 11130-11130

    • DOI

      10.1038/s41598-022-15438-6

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Lack of Cathepsin D in the central nervous system results in microglia and astrocyte activation and the accumulation of proteinopathy-related proteins2022

    • Author(s)
      Suzuki Chigure、Yamaguchi Junji、Sanada Takahito、Oliva Trejo Juan Alejandro、Kakuta Souichirou、Shibata Masahiro、Tanida Isei、Uchiyama Yasuo
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 11662-11615

    • DOI

      10.1038/s41598-022-15805-3

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] <scp>GPHR</scp> ‐mediated acidification of the Golgi lumen is essential for cholesterol biosynthesis in the brain2022

    • Author(s)
      Sou Yu‐shin、Yamaguchi Junji、Kameda Hiroshi、Masuda Keisuke、Maeda Yusuke、Uchiyama Yasuo、Koike Masato
    • Journal Title

      FEBS Letters

      Volume: 596 Issue: 22 Pages: 2873-2888

    • DOI

      10.1002/1873-3468.14491

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Membranous Structures Directly Come in Contact With p62/SQSTM1 Bodies2021

    • Author(s)
      Tanida Isei、Haruta Tomohiro、Suga Mitsuo、Takei Shunsuke、Takebe Akira、Furuta Yoko、Yamaguchi Junji、Oliva Trejo Juan Alejandro、Kakuta Soichiro、Uchiyama Yasuo
    • Journal Title

      Journal of Histochemistry &amp; Cytochemistry

      Volume: 69 Issue: 6 Pages: 407-414

    • DOI

      10.1369/00221554211011423

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Three-Dimensional Architecture of Glomerular Endothelial Cells Revealed by FIB-SEM Tomography2021

    • Author(s)
      Kawasaki Yuto、Hosoyamada Yasue、Miyaki Takayuki、Yamaguchi Junji、Kakuta Soichiro、Sakai Tatsuo、Ichimura Koichiro
    • Journal Title

      Frontiers in Cell and Developmental Biology

      Volume: 9 Pages: 653472-653472

    • DOI

      10.3389/fcell.2021.653472

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Homeostatic p62 levels and inclusion body formation in CHCHD2 knockout mice2021

    • Author(s)
      Sato Shigeto、Noda Sachiko、Torii Satoru、Amo Taku、Ikeda Aya、Funayama Manabu、Yamaguchi Junji、Fukuda Takahiro、Kondo Hiromi、Tada Norihiro、Arakawa Satoko、Watanabe Masahiko、Uchiyama Yasuo、Shimizu Shigeomi、Hattori Nobutaka
    • Journal Title

      Human Molecular Genetics

      Volume: 30 Issue: 6 Pages: 443-453

    • DOI

      10.1093/hmg/ddab057

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] カテプシンD欠損マウス神経細胞内に蓄積する異常リソソームを標的とした選択的オートファ ジーの解析2023

    • Author(s)
      山口隼司
    • Organizer
      第128回 日本解剖学会
    • Related Report
      2022 Research-status Report
  • [Presentation] 中枢神経系特異的CTSD / Atg7両欠損マウスを用いた神経細胞内不良リソソームの品質管理機構の解明2022

    • Author(s)
      山口 隼司
    • Organizer
      第127回日本解剖学会総会・全国学術集会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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