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Realtime manipulation of hippocampal spike sequences in rats

Research Project

Project/Area Number 20H03545
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 51010:Basic brain sciences-related
Research InstitutionTohoku University

Principal Investigator

Sasaki Takuya  東北大学, 薬学研究科, 教授 (70741031)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2022: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
Keywords海馬 / 記憶 / 学習 / 神経同期活動 / 場所細胞 / スパイク列 / 空間課題 / 同期活動 / シータ波 / オンライン操作
Outline of Research at the Start

海馬は、記憶や学習に重要な脳領域であり、神経活動に関する多くの知見が得られてきた。しかし従来の研究は、計測のみに基づいた相関解析がほとんである。本研究では因果的な実証を目指し、ラット海馬の神経活動をリアルタイムで検出し、同時に海馬にフィードバック刺激を加えることで、その活動のみを時間選択的に攪乱させる。動物には複数の選択肢と解が用意されているような迷路課題を解かせ、オンライン操作法を適用することで、予測や意思決定、学習・記憶などの脳機能がいかに変化するか検証する。

Outline of Final Research Achievements

This study investigated how awake synchronous events during a new experience contribute to the formation of reactivation patterns in the hippocampal neuronal circuits. The researchers found that the disruption of awake sharp-wave ripples prevented the experience-induced changes in neuronal contributions during post-experience synchronous events. Additionally, the hippocampal place cells that participated more in reward-related synchronous events exhibited stronger reactivation during post-experience synchronous events. The combined effects of awake synchronous neuronal patterns and place-selective firing patterns determined the ensembles of cells that showed significant increases or decreases in their correlated spikes. Overall, awake synchronous events play a crucial role in identifying the hippocampal neuronal ensembles that will be involved in synchronous reactivation during subsequent offline states, thus promoting memory consolidation.

Academic Significance and Societal Importance of the Research Achievements

脳においては、新しい経験を学習することで、神経細胞集団の協調的な活動パターンが多様な形で再構成され、個々の細胞自体の興奮性や細胞間の機能的結合に変化が生じる。本研究では、特に記憶に重要であると考えられる海馬において、環境を経験した後の休息や睡眠時などに、神経細胞集団の同期的な再活性化のパターンが重要な役割を担うことを見出した。社会生活に身近な記憶や学習の新たな神経メカニズムを解明したという点で、重要な意義をもつ研究成果であり、また睡眠や休憩時の脳の活動の重要性にもあらためて焦点を当てる契機となる。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (10 results)

All 2022 2021 Other

All Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 6 results,  Open Access: 6 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 3 results) Remarks (1 results)

  • [Journal Article] Memory-related neurophysiological mechanisms in the hippocampus underlying stress susceptibility2022

    • Author(s)
      Kuga Nahoko、Sasaki Takuya
    • Journal Title

      Neuroscience Research

      Volume: ー Pages: 00213-9

    • DOI

      10.1016/j.neures.2022.07.010

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Humanized substitutions of Vmat1 in mice alter amygdala-dependent behaviors associated with the evolution of anxiety2022

    • Author(s)
      Sato Daiki X.、Inoue Yukiko U.、Kuga Nahoko、Hattori Satoko、Nomoto Kensaku、Morimoto Yuki、Sala Giovanni、Hagihara Hideo、Kikusui Takefumi、Sasaki Takuya、Ikegaya Yuji、Miyakawa Tsuyoshi、Inoue Takayoshi、Kawata Masakado
    • Journal Title

      iScience

      Volume: 25 Issue: 8 Pages: 104800-104800

    • DOI

      10.1016/j.isci.2022.104800

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] BOD1 regulates the cerebellar IV/V lobe-fastigial nucleus circuit associated with motor coordination2022

    • Author(s)
      Liu Xiu-Xiu、Chen Xing-Hui、Zheng Zhi-Wei、Jiang Qin、Li Chen、Yang Lin、Chen Xiang、Mao Xing-Feng、Yuan Hao-Yang、Feng Li-Li、Jiang Quan、Shi Wei-Xing、Sasaki Takuya、Fukunaga Kohji、Chen Zhong、Han Feng、Lu Ying-Mei
    • Journal Title

      Signal Transduction and Targeted Therapy

      Volume: 7 Issue: 1 Pages: 170-170

    • DOI

      10.1038/s41392-022-00989-x

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Prefrontal-amygdalar oscillations related to social behavior in mice2022

    • Author(s)
      Kuga Nahoko、Abe Reimi、Takano Kotomi、Ikegaya Yuji、Sasaki Takuya
    • Journal Title

      eLife

      Volume: 11

    • DOI

      10.7554/elife.78428

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Phasic firing of dopaminergic neurons in the ventral tegmental area triggers peripheral immune responses2022

    • Author(s)
      Kayama Tasuku、Ikegaya Yuji、Sasaki Takuya
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 1447-1447

    • DOI

      10.1038/s41598-022-05306-8

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Theta-Range Oscillations in Stress-Induced Mental Disorders as an Oscillotherapeutic Target2021

    • Author(s)
      Okonogi Toya、Sasaki Takuya
    • Journal Title

      Frontiers in Behavioral Neuroscience

      Volume: 15 Pages: 698753-698753

    • DOI

      10.3389/fnbeh.2021.698753

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] The roles of awake hippocampal replays for online learning and offline memory reactivation2022

    • Author(s)
      佐々木拓哉
    • Organizer
      第95回日本神経科学大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 迷走神経による精神機能調節メカニズムの解明2022

    • Author(s)
      佐々木拓哉
    • Organizer
      千里ライフサイエンスセミナー
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Deciphering multidimensional physiological signals to unveil brain-body interactions2022

    • Author(s)
      Takuya Sasaki
    • Organizer
      International Graduate Student Conference in Pharmaceutical Sciences
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Remarks] 東北大学大学院薬学研究科薬理学分野ホームページ

    • URL

      http://www.pharm.tohoku.ac.jp/~yakuri/publication.html

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report 2020 Annual Research Report

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Published: 2020-04-28   Modified: 2024-01-30  

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