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Circuit mechanism of spatial context information processing

Research Project

Project/Area Number 19H01010
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 46:Neuroscience and related fields
Research InstitutionKyoto University

Principal Investigator

Hayashi Yasunori  京都大学, 医学研究科, 教授 (90466037)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥45,890,000 (Direct Cost: ¥35,300,000、Indirect Cost: ¥10,590,000)
Fiscal Year 2021: ¥13,260,000 (Direct Cost: ¥10,200,000、Indirect Cost: ¥3,060,000)
Fiscal Year 2020: ¥13,260,000 (Direct Cost: ¥10,200,000、Indirect Cost: ¥3,060,000)
Fiscal Year 2019: ¥19,370,000 (Direct Cost: ¥14,900,000、Indirect Cost: ¥4,470,000)
Keywords記憶固定化 / 記憶痕跡 / 空間記憶 / 前帯状皮質 / 海馬 / 空間文脈細胞 / 場所情報 / カルシウムイメージング / 場所記憶 / 場所細胞 / 記憶学習 / 抽象化 / 大脳皮質
Outline of Research at the Start

情報の抽象化は脳での情報処理の基本である。場所情報では嗅内野格子細胞と海馬場所細胞などに担われる場所の絶対情報を元に、例えば「自宅の部屋」といった抽象化が行われていると考えられる。しかし、抽象化された概念が脳のどこでどのように形成、表現されているかは明らかではない。我々は最近、空間への曝露を繰り返すことで、前帯状皮質に、空間の特定の地点ではなく、その空間内であればどこでも反応する細胞、つまり空間文脈に反応する神経細胞が出現することを見出した。そこでこの「空間文脈細胞」が抽象化された場所概念の認識と記憶を担うと考え、その形成の細胞メカニズムを中心に場所情報の抽象化についての研究を行っていく。

Outline of Final Research Achievements

We found spatial context cells in the anterior cingulate cortex that respond anywhere in a given space after repeated exposure to the space. Spatial context cells first appeared as place cells, then their receptive fields expanded to become spatial context cells. When hippocampal neural activity was suppressed using DREADD, they stopped forming. However, once established, hippocampal inactivation cannot eliminate spatial context cells. When hippocampal activity was suppressed during sleep, the formation of spatial context cells was similarly inhibited. This shares property with long-term memory. When G-CaMP was expressed using the c-fos promoter, which is known to be expressed in memory engram cells, larger proportion of cells became spatial context cells. These results suggest that spatial context cells are responsible for memory engram.

Academic Significance and Societal Importance of the Research Achievements

これまで記憶エングラム細胞という概念が知られていましたが、そういった細胞が一体どの様な記憶情報をコードしているのかは明らかではありませんでした。わたしたちは記憶エングラム細胞が抽象概念化された場所情報を担っていることに気づきました。これは物事を記憶するときに内容を抽象化することとも一致しています。今後の研究では、アルツハイマー病モデル動物などでこの細胞がどうなっているかを観察していきたいと思っています。

Report

(4 results)
  • 2021 Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Comments on the Screening Results   Annual Research Report
  • Research Products

    (7 results)

All 2021 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (4 results) (of which Int'l Joint Research: 4 results,  Open Access: 4 results,  Peer Reviewed: 2 results) Remarks (1 results)

  • [Int'l Joint Research] Max Planck Institue(ドイツ)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Instituto Cajal, CSIC/Instituto de Neurociencias de Alicante/Universidad Europea de Madrid(スペイン)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Shared and unique properties of place cells in anterior cingulate cortex and hippocampus2021

    • Author(s)
      Bota Ayaka、Goto Akihiro、Tsukamoto Suzune、Schmidt Alexander、Wolf Fred、Luchetti Alessandro、Nakai Junichi、Hirase Hajime、Hayashi Yasunori
    • Journal Title

      bioRxiv

      Volume: -

    • DOI

      10.1101/2021.03.29.437441

    • Related Report
      2020 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Journal Article] Sublayer- and cell-type-specific neurodegenerative transcriptional trajectories in hippocampal sclerosis2021

    • Author(s)
      Cid Elena、Marquez-Galera Angel、Valero Manuel、Gal Beatriz、Medeiros Daniel C.、Navarr?n Carmen M.、Ballesteros-Esteban Luis、Reig-Viader Rita、Morales Aixa V.、Fernandez-Lamo Ivan、Gomez-Dominguez Daniel、Sato Masaaki、Hayashi Yasunori、Bay?s ?lex、Barco Angel、L?pez-Atalaya Jose P、de la Prida Liset M
    • Journal Title

      bioRxiv

      Volume: -

    • DOI

      10.1101/2021.02.03.429560

    • Related Report
      2020 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Journal Article] Distinct mechanisms of over-representation of landmarks and rewards in the hippocampus2020

    • Author(s)
      Masaaki Sato, Kotaro Mizuta, Tanvir Islam, Masako Kawano, Yukiko Sekine, Takashi Takekawa, Daniel Gomez-Dominguez, Alexander Schmidt, Fred Wolf, Karam Kim, Hiroshi Yamakawa,, Masamichi Ohkura, Min Goo Lee, Tomoki Fukai, Junichi Nakai, Yasunori Hayashi
    • Journal Title

      Cell Report

      Volume: -

    • NAID

      120006867158

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The role of CaMKII-Tiam1 complex on learning and memory2019

    • Author(s)
      Kojima Hiroto、Rosendale Morgane、Sugiyama Yui、Hayashi Mariko、Horiguchi Yoko、Yoshihara Toru、Ikegaya Yuji、Saneyoshi Takeo、Hayashi Yasunori
    • Journal Title

      Neurobiology of Learning and Memory

      Volume: 166 Pages: 107070-107070

    • DOI

      10.1016/j.nlm.2019.107070

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Remarks]

    • URL

      http://glutamate.med.kyoto-u.ac.jp

    • Related Report
      2019 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2024-12-25  

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