• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Understanding the mechanism for memory retrieval based on the neural dynamics and manipulation

Research Project

Project/Area Number 17K19445
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Research Field Neuroscience and related fields
Research InstitutionUniversity of Toyama

Principal Investigator

Nomoto Masanori  富山大学, 学術研究部医学系, 助教 (20636253)

Project Period (FY) 2017-06-30 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Keywords連合記憶 / 海馬 / 反回回路 / カルシウムイメージング / オプトジェネティクス / CA3 / CA1 / 記憶想起 / 記憶連合 / 反響 / 記憶痕跡 / ダイナミズム / 記憶固定化 / セルアンサンブル / 神経科学
Outline of Final Research Achievements

Mathematical simulation models suggest that CA3 recurrent circuit, upstream of CA1, where input information reverberate, is involved in the associative memory processing. However, the role of CA3 in the associative memory processing is still obscure.
We found that the mutant mice specifically lacking the N-methyl-D-aspartate (NMDA) receptor gene in CA3 (CA3-NR1 KO) mice showed the impairments of long-term cued-fear memory retrieval, and optogenetic silencing of CA3 during memory retrieval impaired long-term memory retrieval. Calcium imaging analysis showed that CA3-NR1 KO impaired the rapid reverberation after the aversive experience in both CA3 and CA1 regions during the inter-trial interval of learning session. These behavioral and calcium imaging results suggest that deficit of CA3 NMDA receptor that leads to a deficit of CA3 recurrent plasticity, impairs the associative memory processing.

Academic Significance and Societal Importance of the Research Achievements

海馬は学習・記憶に重要であることが知られている。しかし、連合記憶の学習および想起時に海馬がどのように活動しているかはあまり明らかになっていない。本申請では、海馬の中でも記憶の連合に重要である海馬CA1とその上流の海馬CA3に注目した。
本研究は、海馬CA3の反回回路の神経可塑性が消失した場合に、連合記憶の学習および想起時に海馬のダイナミズムを明らかにし、これまで仮説状態であった海馬CA3の反響作用を実験的に初めて示した。本研究結果は、記憶連合における海馬CA3およびCA1の重要性が明らかとなり、PTSDおよび記憶障害の新規治療法開発の一助となることが期待される。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (8 results)

All 2020 2019 2018 2017

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

  • [Journal Article] Artificial association of memory events by optogenetic stimulation of hippocampal CA3 cell ensembles2019

    • Author(s)
      Oishi Naoya、Nomoto Masanori、Ohkawa Noriaki、Saitoh Yoshito、Sano Yoshitake、Tsujimura Shuhei、Nishizono Hirofumi、Matsuo Mina、Muramatsu Shin-ichi、Inokuchi Kaoru
    • Journal Title

      Molecular Brain

      Volume: 12 Issue: 1 Pages: 111111-111111

    • DOI

      10.1186/s13041-018-0424-1

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Behavioral, cellular, and synaptic tagging frameworks2018

    • Author(s)
      Nomoto Masanori、Inokuchi Kaoru
    • Journal Title

      Neurobiology of Learning and Memory

      Volume: 18 Pages: 30065-0

    • DOI

      10.1016/j.nlm.2018.03.010

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 海馬CA3 NMDA受容体の 嫌忌経験後の急速情報反響における役割2020

    • Author(s)
      野本真順、村山絵美、芳賀 達也、大川宜昭、村松慎一、深井 朋樹、井ノ口馨
    • Organizer
      第43回日本神経科学大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 海馬CA3反回回路は学習後の固定化・想起プロセスに関わる2019

    • Author(s)
      野本真順、村山絵美、芳賀 達也、大川宜昭、村松慎一、深井 朋樹、井ノ口馨
    • Organizer
      第42回日本神経科学大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 海馬CA3は学習誘導性の高頻度活動を介して連合学習プロセスに関わる2018

    • Author(s)
      野本真順、村山絵美、大川宜昭、西園啓文、松尾美奈、村松慎一、井ノ口馨
    • Organizer
      第41回日本神経科学大会
    • Related Report
      2017 Research-status Report
  • [Book] 『記憶は人為的に書き換えられる』記憶と忘却に関わる脳のしくみー分子機構から健忘の症候まで2018

    • Author(s)
      野本 真順、井ノ口 馨
    • Total Pages
      13
    • Publisher
      医学書院
    • Related Report
      2018 Research-status Report
  • [Book] 生化学2018

    • Author(s)
      野本真順、井ノ口馨
    • Total Pages
      6
    • Publisher
      日本生化学会
    • Related Report
      2017 Research-status Report
  • [Book] 脳科学辞典(記憶固定化)2017

    • Author(s)
      大川 宜昭、野本 真順、井ノ口 馨
    • Publisher
      日本神経科学学会
    • Related Report
      2017 Research-status Report

URL: 

Published: 2017-07-21   Modified: 2021-02-19  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi