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The formation of fundamental neocortical circuits by the gap junctional network in layer 5

Research Project

Project/Area Number 16K14565
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Neurophysiology / General neuroscience
Research InstitutionKagoshima University (2018)
Institute of Physical and Chemical Research (2016-2017)

Principal Investigator

Nakagawa Nao  鹿児島大学, 医歯学域医学系, 助教 (20611065)

Co-Investigator(Kenkyū-buntansha) 米田 泰輔  生理学研究所, 基盤神経科学研究領域, 特任助教 (40709218)
Research Collaborator Ooshima Eriko  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsgap junctionネットワーク / gap junction / 大脳皮質 / 発達期 / 神経回路形成 / ギャップ結合 / 同期活動 / 大脳新皮質 / 回路形成 / マイクロカラム / 大脳新皮質第5層 / 神経科学 / 脳・神経
Outline of Final Research Achievements

From the detailed analysis of the GJ network of developing neocortex layer 5, we found that the network is a plausible mechanism of constructing microcolumn that is considered to be a functional unit of the neocortex. The findings, together with other experimental results, were published in Science. Also, we found that the electrical transmission and synchronous firing provided by the GJ network were significantly slower than those previously reported. The results were published in Neuroscience.

Academic Significance and Societal Importance of the Research Achievements

大脳皮質第5層のGJネットワークは、シナプス形成が始まる生後1-2週に消失することから、初期のシナプス回路の形成に重要な働きを持つ可能性がある。今後、GJ機能に異常を持つ変異マウスや、GJネットワークを人為的に操作したマウスにおいて、シナプス回路を解析する必要がある。また、GJとてんかんとの関連はよく知られていることから、同マウスで脳活動や行動を調べることで、幼若期のてんかん発症への関係も調べられると期待される。これらの実験によって、正常な神経回路形成と脳の疾患へのGJネットワークの関与を、早急に調べる必要がある。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (13 results)

All 2019 2018 2017 2016 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (8 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results) Book (1 results) Remarks (2 results)

  • [Journal Article] Slow Dynamics in Microcolumnar Gap Junction Network of Developing Neocortical Pyramidal Neurons2019

    • Author(s)
      Nakagawa Nao、Hosoya Toshihiko
    • Journal Title

      Neuroscience

      Volume: 406 Pages: 554-562

    • DOI

      10.1016/j.neuroscience.2019.02.013

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Lattice system of functionally distinct cell types in the neocortex2017

    • Author(s)
      Maruoka H*, Nakagawa N*, Tsuruno S*, Sakai S*, Yoneda T*, Hosoya T *Equal contribution
    • Journal Title

      Science

      Volume: 358 Issue: 6363 Pages: 610-615

    • DOI

      10.1126/science.aam6125

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] Gap junction network of excitatory neurons in the developing neocortex2018

    • Author(s)
      Nao Nakagawa, Toshihiko Hosoya
    • Organizer
      The 49th NIPS International Symposium "Ion channels: looking back, seeing ahead"
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Involvement of gap junctions in the function of microcolumns in neocortex2017

    • Author(s)
      中川 直、米田 泰輔、丸岡 久人、酒井 誠一郎、細谷 俊彦
    • Organizer
      次世代脳プロジェクト冬のシンポジウム2017
    • Related Report
      2017 Research-status Report
  • [Presentation] Lattice system of functionally distinct cell types in the neocortex2017

    • Author(s)
      中川 直
    • Organizer
      遺伝研研究会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Involvement of gap junctions in the function of microcolumns in neocortex2017

    • Author(s)
      中川 直、米田 泰輔、丸岡 久人、酒井 誠一郎、細谷 俊彦
    • Organizer
      北米神経科学学会
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 大脳新皮質第6層のギャップ結合ネットワークとマイクロカラム構造2017

    • Author(s)
      中川 直、米田 泰輔、細谷 俊彦
    • Organizer
      第40回日本神経科学大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Lattice System of Distinct Cell Types in Neocortex2017

    • Author(s)
      中川 直、丸岡 久人、酒井 誠一郎、米田 泰輔、鶴野 瞬、細谷 俊彦
    • Organizer
      Cortical Development Conference 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Involvement of gap junction in the organization and function of microcolumn in neocortex2016

    • Author(s)
      Nao Nakagawa, Hisato Maruoka, Shun Tsuruno, Seiichiro Sakai, Taisuke Yoneda, Toshihiko Hosoya
    • Organizer
      Symposium “Circuit Construction in the Mammalian Brain”
    • Place of Presentation
      Osaka University, Japan
    • Year and Date
      2016-08-08
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 大脳新皮質マイクロカラム格子配列の構造と機能2016

    • Author(s)
      細谷 俊彦、丸岡 久人、中川 直、鶴野 瞬、酒井 誠一郎、米田 泰輔
    • Organizer
      第39回日本神経科学大会
    • Place of Presentation
      パシフィコ横浜
    • Related Report
      2016 Research-status Report
  • [Book] 大脳皮質の単位回路2018

    • Author(s)
      細谷俊彦,中川直,米田泰輔,丸岡久人
    • Total Pages
      8
    • Publisher
      医学書院
    • Related Report
      2018 Annual Research Report
  • [Remarks] 脳の基本単位回路を発見 -単純な回路が繰り返した格子構造が存在-

    • URL

      http://www.riken.jp/pr/press/2017/20171103_1/

    • Related Report
      2017 Research-status Report
  • [Remarks] 理研BSI局所神経回路研究チーム ホームページ

    • URL

      http://t-hosoya.brain.riken.jp

    • Related Report
      2016 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

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