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Cell type specific neural circuit structures and circuit formation mechanisms in mouse primary visual cortex

Research Project

Project/Area Number 18K14831
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 46010:Neuroscience-general-related
Research InstitutionTokyo Metropolitan Institute of Medical Science

Principal Investigator

SAKAI Seiichiro  公益財団法人東京都医学総合研究所, 脳・神経科学研究分野, 研究員 (40709747)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords大脳新皮質 / マウス / 細胞タイプ / 視覚野 / 組織透明化 / カルシウムイメージング / 遺伝子発現 / 神経細胞サブタイプ / FACS / 次世代シークエンス / 一次視覚野 / 神経細胞 / FCAS / RNAseq / 遺伝子発現解析 / 視覚 / 神経回路 / 回路形成
Outline of Final Research Achievements

The neocortex contains many different neuronal subtypes with different gene expression, which are thought to constitute a regular neural circuit. In the present study, we investigated the structure and function of neural circuits composed of excitatory neurons with different axonal projections in the primary visual cortex of mice. In the mouse neocortex, we found that neurons that project axons extracortically and neurons that project axons intracortically form subtype-specific microcolumn clusters, and that neuronal activity is synchronized within each microcolumn. On the other hand, we found that the responses of microcolumns to visual stimuli differed depending on the neuronal subtype. This study has revealed a part of the principle of information processing in the neocortex.

Academic Significance and Societal Importance of the Research Achievements

大脳新皮質では多くのニューロンによって複雑な神経回路網が形成されているが、ニューロンサブタイプごと規則的な軸索投射や神経機能を有することが近年の研究で明らかになりつつある。本研究成果は、大脳新皮質5層において軸索投射先の異なる興奮性ニューロンが規則的な神経活動を示す機能単位を構成していることを示しており、複雑な神経回路網を規則的で比較的単純な機能単位に分解して理解することを可能にする。本研究の成果を基に、大脳新皮質における情報処理の解明が今後さらに進むと期待される。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (8 results)

All 2021 2019 2018 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (4 results) Remarks (1 results)

  • [Journal Article] Extracellular DJ 1 i nduces sterile inflammation in the ischemic brain2021

    • Author(s)
      Koutarou Nakamura, Seiichiro Sakai, Jun Tsuyama, Akari Nakamura, Kento Otani, Kumiko Kurabayashi, Yoshiko Yogiashi, Hisao Masai, Takashi Shichita
    • Journal Title

      PLOS Biology

      Volume: -

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Inflammation and neural repair after ischemic brain injury2018

    • Author(s)
      Sakai Seiichiro、Shichita Takashi
    • Journal Title

      Neurochemistry International

      Volume: - Pages: 130-130

    • DOI

      10.1016/j.neuint.2018.10.013

    • Related Report
      2019 Research-status Report 2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Large-scale Three-dimensional Imaging of Cellular Organization in the Mouse Neocortex2018

    • Author(s)
      Yoneda Taisuke、Sakai Seiichiro、Maruoka Hisato、Hosoya Toshihiko
    • Journal Title

      Journal of Visualized Experiments

      Volume: 139 Issue: 139

    • DOI

      10.3791/58027

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] 脳梗塞後における大脳新皮質広域の神経回路再構築と遺伝子発現変化2021

    • Author(s)
      酒井 誠一郎, 七田 崇
    • Organizer
      第43回日本神経科学学会大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Remodeling of neuronal connectivity in the neocortex after ischemic stroke2019

    • Author(s)
      酒井 誠一郎, 七田 崇
    • Organizer
      第11回 光操作研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] 脳梗塞後における大脳新皮質領野間結合の再編2019

    • Author(s)
      酒井 誠一郎, 七田 崇
    • Organizer
      次世代脳プロジェクト冬のシンポジウム
    • Related Report
      2019 Research-status Report
  • [Presentation] 脳梗塞後における大脳新皮質広域神経回路の再編2018

    • Author(s)
      酒井 誠一郎
    • Organizer
      生理学研究所研究会「認知脳神経科学の先端」
    • Related Report
      2018 Research-status Report
  • [Remarks] 東京都医学総合研究所ホームページ

    • URL

      http://www.igakuken.or.jp/

    • Related Report
      2020 Annual Research Report 2019 Research-status Report

URL: 

Published: 2018-04-23   Modified: 2022-01-27  

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