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Regulatory mechanisms of spine formation and synaptic plasticity by ubiquitination; toward the treatment of dementia

Research Project

Project/Area Number 20K07334
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 48040:Medical biochemistry-related
Research InstitutionGunma University (2021-2022)
Foundation for Biomedical Research and Innovation at Kobe (2020)

Principal Investigator

Kawabe Hiroshi  群馬大学, 大学院医学系研究科, 教授 (00582454)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsユビキチン化 / 超解像顕微鏡 / ユビキチン / シナプス
Outline of Research at the Start

本研究では、E3ユビキチンリガーゼであるNedd4-2によるユビキチン化がいかにしてスパイン形態とシナプス伝達そしてシナプス可塑性を制御するか明らかにする。そのために神経細胞特異的Nedd4-2条件付き欠損マウスでのスパインの微細形態の変化と、PSD構成タンパク質そして神経伝達物質受容体の局在の変化を超解像STED顕微鏡で明らかにする。さらに電気生理学的実験で、神経細胞特異的Nedd4-2条件付き欠損マウスを使ってシナプス伝達とシナプス可塑性の変化を解明する。

Outline of Final Research Achievements

We started this study to examine whether Nedd4-2 is important for spine morphology and synaptic plasticity using neuron-specific Nedd4-2 conditional KO mice (Nedd4-2 cKO). We discovered that Nedd4-2 cKO showed an interesting phenotype in synaptic plasticity. We have confirmed that the expression levels of identified substrate proteins are increased in Nedd4-2 cKO. We have shown that this elevated expression of substrate proteins is responsible for the synaptic plasticity phenotype. We have also developed a super-resolution microscopy technique to examine how the micro-localization of synaptic component proteins and synaptic micro-morphology are altered in Nedd4-2 cKO.

Academic Significance and Societal Importance of the Research Achievements

神経科学研究の領域で、特異的ユビキチン化の意義は神経変性疾患を中心に研究されてきた。この研究分野において日本は世界をリードしている。一方で、神経細胞の正常な機能、特にシナプスにおける機能における特異的ユビキチン化の意義はほとんど研究されてこなかった。本研究では未知な部分が多いシナプス可塑性の制御における特異的ユビキチン化の役割を世界に先駆けて明らかにした。この成果は記憶のメカニズムが明らかになるだけでなく、Nedd4-2による基質タンパク質のユビキチン化を制御することで認知症の治療法の開発へと発展する可能性が期待できる。

Report

(2 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (8 results)

All 2021 Other

All Int'l Joint Research (3 results) Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (1 results) Patent(Industrial Property Rights) (1 results)

  • [Int'l Joint Research] Freie University of Berlin/Humboldt-University of Berlin/University of Heidelberg(ドイツ)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] University of Pennsylvania(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Swiss Federal Institute of Technology(スイス)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Super-resolved 3D-STED microscopy identifies a layer-specific increase in excitatory synapses in the hippocampal CA1 region of Neuroligin-3 KO mice2021

    • Author(s)
      Koganezawa Noriko、Hanamura Kenji、Schwark Manuela、Krueger-Burg Dilja、Kawabe Hiroshi
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 582 Pages: 144-149

    • DOI

      10.1016/j.bbrc.2021.10.003

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Congenital Deletion of Nedd4-2 in Lung Epithelial Cells Causes Progressive Alveolitis and Pulmonary Fibrosis in Neonatal Mice2021

    • Author(s)
      Leitz Dominik H. W.、Duerr Julia、Mulugeta Surafel、Seyhan Agircan Ay?a、Zimmermann Stefan、Kawabe Hiroshi、Dalpke Alexander H.、Beers Michael F.、Mall Marcus A.
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 11 Pages: 6146-6146

    • DOI

      10.3390/ijms22116146

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] NEDD4-1 Is a Key Regulator of Epidermal Homeostasis and Wound Repair2021

    • Author(s)
      Yan Shen、Ripamonti Raphael、Kawabe Hiroshi、Ben-Yehuda Greenwald Maya、Werner Sabine
    • Journal Title

      Journal of Investigative Dermatology

      Volume: 22 Issue: 6 Pages: 6146-6146

    • DOI

      10.1016/j.jid.2021.09.033

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Super-resolved 3D-STED microscopy identifies a layer-specific increase in excitatory synapses in the hippocampal CA1 region of Neuroligin-3 KO mice2021

    • Author(s)
      Koganezawa Noriko、Hanamura Kenji、Schwark Manuela、Krueger-Burg Dilja、Kawabe Hiroshi
    • Organizer
      第95回日本薬理学会年会
    • Related Report
      2021 Research-status Report
  • [Patent(Industrial Property Rights)] 記憶力向上のための認知症治療薬のスクリーニング方法2021

    • Inventor(s)
      川辺 浩志
    • Industrial Property Rights Holder
      川辺 浩志
    • Industrial Property Rights Type
      特許
    • Filing Date
      2021
    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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