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A role of Pcdh10 in synapse elimination of the developing mouse cerebellum

Research Project

Project/Area Number 19K16250
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 46010:Neuroscience-general-related
Research InstitutionThe University of Tokyo

Principal Investigator

Watanabe Takaki  東京大学, 大学院医学系研究科(医学部), 助教 (90749798)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords小脳 / プルキンエ細胞 / シナプス刈り込み / プロトカドヘリン / 自閉スペクトラム症
Outline of Research at the Start

本研究において、自閉スペクトラム症(ASD)関連遺伝子プロトカドヘリン10 (Pcdh10)の小脳における役割を解明する。Pcdh10がプルキンエ細胞の一部の集団で発現することに注目し、発達期小脳で起こる登上線維-プルキンエ細胞のシナプス刈り込みがそもそも小脳全体で均一に進むかを、小脳スライス標本で電気生理学的に明らかにする。プルキンエ細胞特異的Pcdh10ノックアウトマウス(Pcdh10-cKO)とPcdh10の過剰発現系を用いて、シナプス刈り込みへの影響を調べる。Pcdh10-cKOマウスの行動解析を行い、小脳のシナプス刈り込み異常とASD様行動との関連を探る。

Outline of Final Research Achievements

This study elucidated the role of the autism spectrum disorder (ASD) -related gene Pcdh10 in the cerebellum. I generated Purkinje cell-specific Pcdh10 knockout mice (Pcdh10-cKO) and investigated electrophysiologically and morphologically for synapse elimination of climbing fibers. I found that PCDH10 of Purkinje cells, which is localized in climbing fiber synapses, has a function of maintaining the synapses against synapse elimination during development, resulting in a delay of climbing fiber elimination in Pcdh10-positive Purkinje cells. Behavioral analysis of Pcdh10-cKO mice in adults suggested that if the normal delay in synapse elimination of climbing fibers by Pcdh10 disappears, repetitive / inflexible behaviors and sociability, which are related to ASD-like behaviors, were enhanced in Pcdh10-cKO mice.

Academic Significance and Societal Importance of the Research Achievements

今回の成果は、Pcdh10発現細胞で登上線維のシナプス刈り込みが遅れて進むこと、Pcdh10がその遅れを作り出すこと、Pcdh10による小脳の発達制御が正常な脳機能に必要であることを明らかにした。また、Pcdh10のプルキンエ細胞での役割を解明しただけでなく、小脳発達が一過的に異常になったマウスが、成体になるとASD様行動異常を引き起こすという現象の発見でもあるという学術的意義がある。発達障害のひとつであるASDを発症しうる仕組みのひとつとして、小脳の発達異常を起因とする、または含んでいる場合がある可能性を示唆しており、この理解によって治療法への開発につながるという社会的意義が考えられる。

Report

(2 results)
  • 2021 Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (7 results)

All 2020 2019 Other

All Journal Article (2 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (4 results) (of which Int'l Joint Research: 2 results) Remarks (1 results)

  • [Journal Article] 特集 小脳と大脳-Masao Itoのレガシー 小脳神経回路の生後発達2019

    • Author(s)
      Watanabe T, Suzuki H, Kano M
    • Journal Title

      BRAIN and NERVE

      Volume: 71 Issue: 12 Pages: 1373-1383

    • DOI

      10.11477/mf.1416201457

    • ISSN
      1344-8129, 1881-6096
    • Year and Date
      2019-12-01
    • Related Report
      2019 Research-status Report
  • [Journal Article] Developmental synapse remodeling in the cerebellum and visual thalamus.2019

    • Author(s)
      Kano M, Watanabe T.
    • Journal Title

      F1000Research

      Volume: 8 Pages: 1191-1191

    • DOI

      10.12688/f1000research.18903.1

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Protocadherin 10は一部のアルドラーゼC陽性の小脳プルキンエ細胞において発達期の登上線維シナプスの刈り込みを遅延させる2020

    • Author(s)
      Takaki Watanabe, Honoka Suzuki, Tsubasa Akamatsu, Kazuto Sakoori, Shutaro Inoue, Manabu Abe, Kenji Sakimura, Naofumi Uesaka, Masanobu Kano
    • Organizer
      第97回日本生理学会大会
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Climbing fiber synapse elimination in aldolase C-positive Purkinje cells is delayed compared to aldolase C-positive Purkinje cells and requires phospholipase C beta 3 in the developmental cerebellum2019

    • Author(s)
      Takaki Watanabe, Yurie Rai, Honoka Suzuki, Tsubasa Akamatsu, Naofumi Uesaka, Masanobu Kano
    • Organizer
      Neuro2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 発達期小脳のプルキンエ細胞における登上線維シナプス刈り込みのPcdh10依存的特異性2019

    • Author(s)
      渡邉貴樹
    • Organizer
      2019年度若手技術支援講習会
    • Related Report
      2019 Research-status Report
  • [Presentation] Protocadherin 10 delays developmental climbing fiber synapse elimination in a subset of aldolase C-positive Purkinje cells in the cerebellum2019

    • Author(s)
      渡邉貴樹
    • Organizer
      次世代脳プロジェクト冬のシンポジウム2019
    • Related Report
      2019 Research-status Report
  • [Remarks]

    • URL

      http://plaza.umin.ac.jp/~neurophy/Kano_Lab_j/Top_j.html

    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

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