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Neural circuit formation of the cerebral cortex by spontaneous neuronal activity

Research Project

Project/Area Number 16K06992
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Neurophysiology / General neuroscience
Research InstitutionKagoshima University (2017-2018)
Kyoto University (2016)

Principal Investigator

Tagawa Yoshiaki  鹿児島大学, 医歯学域医学系, 教授 (50303813)

Research Collaborator Hagihara Kenta  
Nakagawa Nao  
Tezuka Yuta  
Iiguni Shuji  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords神経回路形成 / 大脳 / 神経活動 / 脳梁 / 神経活動操作 / 軸索投射 / 形成 / 再生 / 大脳皮質 / 神経科学 / イオンチャネル
Outline of Final Research Achievements

This study aimed to clarify the role(s) of spontaneous neuronal activity in callosal axon projections in mouse cerebral cortex during development. Using temporally controlled activity manipulation and recordings, we found that spontaneous cortical network activity during the second postnatal week plays key role in callosal axon projections. The network activity can be classified as highly synchronous and less synchronous events: callosal axon projections could be formed when the less-synchronous network activity was present. Further studies suggested that callosal projection neurons form functional subnetworks in the cortical circuits. These findings suggest that callosal projection neurons form functional subnetworks during development, and that the correlated activity of such subnetworks plays important role on their axonal projections.

Academic Significance and Societal Importance of the Research Achievements

本研究は、大脳の代表的な長距離神経回路である脳梁神経回路の形成における神経活動の役割を明らかにすることを目的とした。脳梁神経回路は右脳と左脳をつなぎ、左右の脳の情報の統合という重要な情報処理に関わる神経回路であり、発達期にどのように形成されるのかを明らかにすることは高次脳機能に関わる疾患の研究につながる重要な研究課題である。本研究により、左右の脳は脳発達期の自発神経活動によってつながること、形成と再形成には臨界期があること(特定の時期に形成されることが必要であること)、発達時期特有の自発神経活動パターンが重要であることが明らかになった。本研究の結果は、今後の疾患研究に重要な情報を提供する。

Report

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

    (15 results)

All 2019 2018 2017 2016 Other

All Int'l Joint Research (1 results) Journal Article (1 results) Presentation (8 results) (of which Int'l Joint Research: 5 results,  Invited: 5 results) Remarks (5 results)

  • [Int'l Joint Research] University of Kent(英国)

    • Related Report
      2016 Research-status Report
  • [Journal Article] 自発神経活動と視覚系神経回路のスクラップ&ビルド2019

    • Author(s)
      田川義晃
    • Journal Title

      生体の科学

      Volume: 70 Pages: 23-27

    • Related Report
      2018 Annual Research Report
  • [Presentation] Activity-dependent formation and restoration of callosal axon projections in developing neocortex.2019

    • Author(s)
      Tagawa Y
    • Organizer
      9th FAOPS Congress in conjunction with the 96th Annual meeting of the Physiological Society of Japan.
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] マウス大脳のマクロな領域間投射と局所回路をつなぐ構築ロジック2018

    • Author(s)
      Tagawa Y
    • Organizer
      鹿児島神経科学研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 自発神経活動による大脳神経回路の形成機構2018

    • Author(s)
      Tagawa Y
    • Organizer
      生理学研究所研究会「情動の神経回路機構とその破綻」
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Activity-dependent formation and restoration of callosal axon projections in developing neocortex.2018

    • Author(s)
      Tagawa Y
    • Organizer
      Cold Spring Harbor Asia symposium
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Activity-dependent callosal axon projections in the developing neocortex.2018

    • Author(s)
      Tagawa Y
    • Organizer
      国立遺伝学研究所研究会「哺乳類脳の機能的神経回路の構築メカニズム」
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Activity-dependent formation and restoration of callosal axon projections in the developing mouse neocortex.2017

    • Author(s)
      Yoshiaki Tagawa
    • Organizer
      40th Annual Meeting of the Japan Neuroscience Society
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 神経活動による大脳神経回路の形成2017

    • Author(s)
      田川 義晃
    • Organizer
      鹿児島神経科学研究会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Activity-dependent circuit construction in neonatal mouse cerebral cortex.2016

    • Author(s)
      Tagawa Y
    • Organizer
      Circuit Construction in the Mammalian Brain
    • Place of Presentation
      Osaka, Japan
    • Year and Date
      2016-08-09
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Remarks]

    • URL

      http://www.kufm.kagoshima-u.ac.jp/~physiol2/index.html

    • Related Report
      2018 Annual Research Report
  • [Remarks]

    • URL

      https://www2.kufm.kagoshima-u.ac.jp/field/advanced-therapeutics/f101/02.html

    • Related Report
      2018 Annual Research Report
  • [Remarks] 研究内容を示す研究室ホームページ

    • URL

      http://www.kufm.kagoshima-u.ac.jp/~physiol2/

    • Related Report
      2017 Research-status Report
  • [Remarks] 研究内容を記した大学のホームページ

    • URL

      http://www2.kufm.kagoshima-u.ac.jp/field/advanced-therapeutics/f101/02.html

    • Related Report
      2017 Research-status Report
  • [Remarks] 大脳皮質の神経回路形成、可塑性の分子メカニズム

    • URL

      http://www.neurosci.biophys.kyoto-u.ac.jp/cortex.html

    • Related Report
      2016 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2022-02-16  

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