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Molecular mechanisms underlying dynein-dynactin-mediated axon specification

Research Project

Project/Area Number 21K06205
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 44020:Developmental biology-related
Research InstitutionFukuoka University

Principal Investigator

Kawada Junichi  福岡大学, 医学部, 助教 (00312207)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords神経極性 / 軸索 / モデルマウス / ダイナクチン / ダイニン / TDP-43 / Perry病 / タンパク凝集体 / 神経変性 / Perry症候群 / 樹状突起 / 神経細胞 / モータータンパク質
Outline of Research at the Start

軸索と樹状突起からなる神経細胞の極性は、神経回路が正しく構築され、機能するのに必要である。複数の樹状突起で受容された情報を統合し、1本だけ存在する軸索に伝達し、シナプス後細胞に出力するという、一方向性の情報伝達は、神経科学の基本原理と考えられてきた。申請者は、Perry病の原因遺伝子Dctn1の変異型を組込んだ遺伝子改変マウスから調製した培養神経細胞が、軸索を複数持つことを見出した。この現象から出発して、軸索を1本に限定する仕組みを解明すると共に、軸索を複数持つ神経細胞の回路では、動作機構がいかに変化し、変性が生じるかという観点から、脳内情報処理と神経病理の新原理を発見したい。

Outline of Final Research Achievements

Perry disease is a rare hereditary neurodegenerative disease, characterized symptomatically by parkinsonism and depression/apathy, and pathologically by TDP-43 proteinopathy. The causative gene DCTN1 encodes the largest subunit of the dynactin complex. Dynactin binds to dynein and regulates dynein-mediated retrograde transport. Although Perry disease-linked missense mutations impair microtubule-binding abilities of DCTN1, it remains unclear how DCTN1 mutations cause TDP-43 proteinopathy. We found that DCTN1 bound to TDP-43 and that Perry disease-linked mutations affected TDP-43-interacting ability of DCTN1 and induced TDP-43 aggregation. We have also established a mouse model of Perry disease. Interestingly, Perry mice revealed parkinsonism and a type of impulse control disorder. Furthermore, primary cortical and hippocampal neurons prepared from Perry mice had multiple axons. We have been analyzing how dynein and dynactin regulate single-axon specification in vitro and in vivo.

Academic Significance and Societal Importance of the Research Achievements

軸索と樹状突起からなる神経極性は、神経機能に必要である。個々の神経細胞で、複数の樹状突起で受容・統合された情報を軸索1本へ伝達し、シナプス後細胞に出力するという、一方向性の情報伝達は、神経科学の基本原理である。何故、そしていかにして神経細胞は軸索を1本だけ持つのか、という問題は、基本的ながら手つかずのままである。今回、Perryマウスと患者脳内で、神経細胞が軸索を複数持つ可能性が浮上した。神経細胞が軸索を複数持つ場合、Perry病患者の知性は低いのでは、と予想されるが、実際は逆であり、発症までは、高い知性を保っている。認知症等への新規治療戦略として、軸索機能の制御技術を将来提供したいと考える。

Report

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

    (11 results)

All 2024 2023 2022 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: 2 results) Presentation (4 results) (of which Invited: 4 results) Remarks (1 results)

  • [Int'l Joint Research] Northwestern大学/Scripps研究所(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Northwestern University(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] The Scripps Research Institute(米国)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Neuronal guidance genes in health and diseases2023

    • Author(s)
      Yuasa-Kawada, J., Konoshita-Kawada, M., Tsuboi, Y., and Wu, J. Y.
    • Journal Title

      Protein & Cell

      Volume: 14 Pages: 238-261

    • DOI

      10.1093/procel/pwac030

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] DCTN1 Binds to TDP-43 and Regulates TDP-43 Aggregation2021

    • Author(s)
      Deshimaru M, Kinoshita-Kawada M, Kubota K, Watanabe T, Tanaka Y, Hirano S, Ishidate F, Hiramoto M, Ishikawa M, Uehara Y, Okano H, Hirose S, Fujioka S, Iwasaki K, Yuasa-Kawada J, Mishima T, Tsuboi Y
    • Journal Title

      Int J Mol Sci

      Volume: 22 Issue: 8 Pages: 3985-3985

    • DOI

      10.3390/ijms22083985

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Behavioral profile in a Dctn1 G71A knock-in mouse model of Perry disease2021

    • Author(s)
      Deshimaru M, Mishima T, Watanabe T, Kubota K, Hosoi M, Kinoshita-Kawada M, Yuasa-Kawada J, Ikeda M, Mori M, Murata Y, Abe T, Enjoji M, Kiyonari H, Kodama S, Fujioka S, Iwasaki K, Tsuboi Y
    • Journal Title

      Neurosci Lett

      Volume: 764 Pages: 136234-136234

    • DOI

      10.1016/j.neulet.2021.136234

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Perry病におけるダイナクチンおよびTDP-43凝集機構解明に向けて2024

    • Author(s)
      三嶋崇靖, 河田純一, 坪井義夫
    • Organizer
      カテコールアミンと神経疾患研究会2024
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Perry病の発症機構解明に向けて2023

    • Author(s)
      河田純一, 三嶋崇靖, 河田真理子, 石舘文善, 合馬慎二, 藤岡伸助, 坪井義夫
    • Organizer
      第24回七隈ADPD研究会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Unveiling link between TDP-43 and dynactin: lessons from Perry disease2022

    • Author(s)
      Yoshio Tsuboi, Takayasu Mishima, Junichi Kawada
    • Organizer
      第63回日本神経学会学術大会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Unveiling link between TDP-43 and dynactin: lessons from Perry disease2021

    • Author(s)
      Yoshio Tsuboi, Takayasu Mishima, Junichi Kawada
    • Organizer
      第63回日本神経学会学術大会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Remarks] Neuronal Guidance Signaling in Health and Diseases

    • URL

      https://www.frontiersin.org/research-topics/59893/neuronal-guidance-signaling-in-health-and-neurological-diseases

    • Related Report
      2023 Annual Research Report

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

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