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Changes in synaptic connections supporting memory consolidation and their regulatory mechanisms

Research Project

Project/Area Number 20K06860
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 46010:Neuroscience-general-related
Research InstitutionOsaka Metropolitan University (2022-2023)
Osaka City University (2020-2021)

Principal Investigator

Miyawaki Hiroyuki  大阪公立大学, 大学院医学研究科, 講師 (40785979)

Project Period (FY) 2020-04-01 – 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 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords記憶 / 大規模電気生理学 / 睡眠 / 神経生理学 / 記憶固定化 / 恐怖学習
Outline of Research at the Start

ヒトを含む動物は経験を通して記憶を獲得し、必要に応じて想起することでその行動を変えることができる。記憶の形成は単一のプロセスではなく、経験時に一時的な記憶として獲得され、それが睡眠中に永続的な記憶として固定化される。この一連の記憶プロセスには、脳領域間ネットワークの変化によって実現されていると考えられているが、その詳細は不明である。そこで本研究では、大規模計測と神経活動への介入実験を組み合わせ、脳領域間ネットワーク変化とその制御機構を明らかにする。

Outline of Final Research Achievements

Memory is acquired through experiences during wakefulness and consolidated during subsequent sleep phases. It has been suggested that a cross-regional brain network undergoes changes throughout this memory formation process, but the details have remained unclear. In this study, we continuously recorded the activity of numerous neurons at a single-cell resolution in three brain regions of freely behaving rats, from the acquisition of memory to the initial stages of its consolidation. We revealed that synchronized activity across brain regions emerged after memory acquisition. Furthermore, we found that such synchronized activity coincides with fast network oscillations, which are presumably related to plastic changes of synaptic connections.

Academic Significance and Societal Importance of the Research Achievements

本研究により、記憶の定着と脳領域横断的な同期活動が関連しており、これらの同期活動は脳波の速いオシレーションをともなって現れることが明らかになった。これまでの研究により、脳波の速いオシレーションはシナプス結合の可塑的な変化との関連が指摘されている。このことは、脳領域横断的な同期活動が領域横断的な神経回路というマクロの構造と、シナプス結合というミクロの変化をつなぐ現象であることを示唆しており、学術的に大きな意味がある。また、このような記憶メカニズムの基礎過程の解明は、認知症をはじめとするさまざまな記憶機能障害の病態理解と治療原理の発見にも寄与すると期待される。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (10 results)

All 2023 2022 2021 2020 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (6 results) (of which Int'l Joint Research: 5 results) Remarks (2 results)

  • [Journal Article] Fast network oscillations during non-REM sleep support memory consolidation2022

    • Author(s)
      Mizuseki Kenji、Miyawaki Hiroyuki
    • Journal Title

      Neuroscience Research

      Volume: - Pages: 3-12

    • DOI

      10.1016/j.neures.2022.12.019

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] De novo inter-regional coactivations of preconfigured local ensembles support memory2022

    • Author(s)
      Miyawaki Hiroyuki、Mizuseki Kenji
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 1272

    • DOI

      10.1038/s41467-022-28929-x

    • URL

      https://ocu-omu.repo.nii.ac.jp/records/2020112

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Hippocampal-cortical network dynamics elucidated with multi-regional in vivo large-scale electrophysiology2023

    • Author(s)
      Hiroyuki Miyawaki
    • Organizer
      The 100th Anniversary Annual Meeting of The Physiological Society of Japan
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Experience-dependent inter-regional coactivations of cell ensembles support memory2022

    • Author(s)
      Hiroyuki Miyawaki
    • Organizer
      The 44th Annual Meeting of the Japan Neuroscience Society
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Memory-supporting inter-regional networks among local cell-ensembles developed in experience dependent manner.2022

    • Author(s)
      Hiroyuki Miyawaki, Kenji MIzuseki
    • Organizer
      The 99th Annual Meeting of the Physiological Society of Japan
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Dynamics of inter-regional cell ensemble interactions underlying memory process2021

    • Author(s)
      Hiroyuki Miyawaki, Kenji MIzuseki
    • Organizer
      The 44th Annual Meeting of the Japan Neuroscience Society
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Multi-regional large-scale electrophysiology revealed that inter-regional coactivations of cell ensembles support fear memory2021

    • Author(s)
      Miyawaki, H., & Mizuseki K.
    • Organizer
      第98回日本生理学会大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Dynamics of inter-regional cellular interactions during slow-wave sleep.2020

    • Author(s)
      Miyawaki, H., & Mizuseki K.
    • Organizer
      The Annual Meeting of the Japan Neuroscience Society
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Remarks] 記憶で変わる脳内ネットワーク

    • URL

      https://www.osaka-cu.ac.jp/ja/news/2021/220315-2

    • Related Report
      2021 Research-status Report
  • [Remarks] 脳領域横断的な同期活動の変化が記憶を支える

    • URL

      http://physiology.jp/science-topic/25243/

    • Related Report
      2021 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2025-01-30  

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