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Endolysosomal dynamics involving microautophagy

Research Project

Project/Area Number 19K05950
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 38060:Applied molecular and cellular biology-related
Research InstitutionOsaka University

Principal Investigator

Wada Yoh  大阪大学, 産業科学研究所, 准教授 (50212329)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsオルガネラ / エンドソーム / リソソーム / シグナル伝達 / HOPS/CORVET複合体 / 初期発生 / V-ATPase / 上皮組織 / CORVET / エンドサイトーシス / 初期胚 / 細胞極性 / ミクロオートファジー / mVam8 / CORVET複合体 / 原腸陥入 / オートファジー
Outline of Research at the Start

液胞・リソソームを終着点とするエンドサイトーシス経路は栄養の供給、細胞間情報伝達の制御に機能する。「液胞」は植物や真菌に特徴的なオルガネラとされている。私たちはミクロオートファジーというユニークな膜ダイナミクスによって高等動物でも「液胞」が形成されることを見いだした。しかしミクロオートファジーを実現する分子機構はわかっていない。本研究はマウス上皮組織でおきる液胞形成を詳細に観察し、遺伝子改変マウスや薬理学的な介入によりミクロオートファジーを司るメカニズムを同定することを目的とする。さらに、変異マウスの表現型を通して高次生理機能の発現おけるミクロオートファジーのはたす役割を明らかにする。

Outline of Final Research Achievements

Endocytosis drives material and informational exchanges between exterior and interior of the cells. In highly differentiated mammalian cells like enterocytes or embryonic epithelial cells, the microautophagy is involved in this endocytic pathway. We have shown that mouse mutant lacking a CORVET complex is failed to transmit the mTORC1 signalling pathway, which is the master regulator for metabolic/catabolic switching. The proton pump V-ATPase determines the energy state of the endosome. Loss of the V-ATPase function resulted in compromising the apicobasal polarity in the embryonic epithelium. We asked whether the microautopahgy is restricted to embryonic stages to find that the enterocytes of new born pups are highly active in this process. Genetic perturbation of the process causes a delay in thrive, demonstrating the significance of the microautophagy in post-natal development.

Academic Significance and Societal Importance of the Research Achievements

マウス初期胚のエンドサイトーシス経路の最終到達点が大きな「液胞」であることを見いだした。「液胞」は従来、植物や菌類特有のオルガネラとされる。しかし、動物細胞でも「液胞」とよべる巨大なオルガネラが、ミクロオートファジーにより形成される。本研究では、このユニークなプロセスを駆動する分子装置の機能を失ったマウスを解析し、生理的な意義を明らかにした。初期発生における組織パターニングを支配するシグナル経路がミクロオートファジーによって制御されていること、また乳飲期の栄養吸収がミクロオートファジーに依存することなどの発見は周産期直前・直後の発達生理の理解にあらたな知見をもたらすものである。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (13 results)

All 2023 2022 2021 2020 2019

All Journal Article (10 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 10 results,  Open Access: 7 results) Presentation (3 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Exploring the Link between Vacuolar-Type Proton ATPase and Epithelial Cell Polarity2022

    • Author(s)
      Ge-Hong Sun-Wada, Yoh Wada
    • Journal Title

      Biological and Pharmaceutical Bulletin

      Volume: 45 Issue: 10 Pages: 1419-1425

    • DOI

      10.1248/bpb.b22-00205

    • ISSN
      0918-6158, 1347-5215
    • Year and Date
      2022-10-01
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The a subunit isoforms of vacuolar-type proton ATPase exhibit differential distribution in mouse perigastrulation embryos2022

    • Author(s)
      Ge-Hong Sun-Wada, Yoh Wada
    • Journal Title

      Sci Rep.

      Volume: 12 Issue: 1 Pages: 13590-13590

    • DOI

      10.1038/s41598-022-18002-4

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The lysosomal V-ATPase a3 subunit is involved in localization of Mon1-Ccz1, the GEF for Rab7, to secretory lysosomes in osteoclasts2022

    • Author(s)
      Matsumoto Naomi、Sekiya Mizuki、Sun-Wada Ge-Hong、Wada Yoh、Nakanishi-Matsui Mayumi
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 8455-8455

    • DOI

      10.1038/s41598-022-12397-w

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Vacuolar-type proton ATPase is required for maintenance of apicobasal polarity of embryonic visceral endoderm2021

    • Author(s)
      Sun-Wada Ge-Hong、Tabata Hiroyuki、Wada Yoh
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 19355-19355

    • DOI

      10.1038/s41598-021-98952-3

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Functional complementation of V-ATPase a subunit isoforms in osteoclasts2020

    • Author(s)
      Matsumoto Naomi、Sekiya Mizuki、Fujimoto Yasuyuki、Haga Satoshi、Sun-Wada Ge-Hong、Wada Yoh、Nakanishi-Matsui Mayumi
    • Journal Title

      The Journal of Biochemistry

      Volume: - Issue: 4 Pages: 459-466

    • DOI

      10.1093/jb/mvaa118

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Rab7-Mediated Endocytosis Establishes Patterning of Wnt Activity through Inactivation of Dkk Antagonism2020

    • Author(s)
      Kawamura Nobuyuki、Takaoka Katsuyoshi、Hamada Hiroshi、Hadjantonakis Anna-Katerina、Sun-Wada Ge-Hong、Wada Yoh
    • Journal Title

      Cell Reports

      Volume: 31 Issue: 10 Pages: 107733-107733

    • DOI

      10.1016/j.celrep.2020.107733

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] V-ATPase a3 isoform mutations identified in osteopetrosis patients abolish its expression and disrupt osteoclast function.2020

    • Author(s)
      Matsumoto N, Matsukawa R, Takahashi S, Kudo K, Sun-Wada GH, Wada Y, Nakanishi-Matsui M.
    • Journal Title

      Exp Cell Res.

      Volume: 389 Issue: 2 Pages: 111901-111901

    • DOI

      10.1016/j.yexcr.2020.111901

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Vacuolar-type ATPase: A proton pump to lysosomal trafficking2019

    • Author(s)
      FUTAI Masamitsu、SUN-WADA Ge-Hong、WADA Yoh、MATSUMOTO Naomi、NAKANISHI-MATSUI Mayumi
    • Journal Title

      Proceedings of the Japan Academy, Series B

      Volume: 95 Issue: 6 Pages: 261-277

    • DOI

      10.2183/pjab.95.018

    • NAID

      130007662351

    • ISSN
      0386-2208, 1349-2896
    • Year and Date
      2019-06-11
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Isoform-specific gene disruptions reveal a role for the V-ATPase subunit a4 isoform in the invasiveness of 4T1-12B breast cancer cells2019

    • Author(s)
      McGuire Christina M.、Collins Michael P.、Sun-Wada GeHong、Wada Yoh、Forgac Michael
    • Journal Title

      Journal of Biological Chemistry

      Volume: 294 Issue: 29 Pages: 11248-11258

    • DOI

      10.1074/jbc.ra119.007713

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Observations From a Mouse Model of Forebrain Voa1 Knockout: Focus on Hippocampal Structure and Function2019

    • Author(s)
      Ma Ke、Bin Na-Ryum、Shi Shan、Harada Hidekiyo、Wada Yoh、Wada Ge-Hong-Sun、Monnier Philippe P.、Sugita Shuzo、Zhang Liang
    • Journal Title

      Frontiers in Cellular Neuroscience

      Volume: 13

    • DOI

      10.3389/fncel.2019.00484

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Microautophagic Membrane Dynamics is Involved in Assembly of Large Vacuoles in Mammalian Cells2023

    • Author(s)
      Kanae SHIRAHAMA-NODA, Ge-Hong SUN-WADA, Yoh WADA
    • Organizer
      The 26th SANKEN International Symposium
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Endolysosomal Integrity Maintains the Extraembryonic Ectoderm Lineage via mTORC1 Signalling2023

    • Author(s)
      Yoh Wada, Ge-Hong Sun-Wada
    • Organizer
      Keystone Symposium on Molecular and Cellular Biology
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Assembly of large vacuoles in mammalian cells involving microautophagy.2022

    • Author(s)
      Kanae SHIRAHAMA-NODA, Ge-Hong SUN-WADA, Yoh WADA
    • Organizer
      The 10th International Symposium on Autophagy (ISA)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2024-01-30  

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