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Effects of social enrichment on social and non-social memory abilities in rats

Research Project

Project/Area Number 19K21806
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 10:Psychology and related fields
Research InstitutionUniversity of Tsukuba

Principal Investigator

YAMADA Kazuo  筑波大学, 人間系, 教授 (30282312)

Co-Investigator(Kenkyū-buntansha) 一谷 幸男  筑波大学, 人間系(名誉教授), 名誉教授 (80176289)
小澤 貴明  大阪大学, 蛋白質研究所, 助教 (90625352)
Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywordsラット / 環境エンリッチメント / 社会的記憶 / 物体再認記憶 / 海馬 / グルタミン酸受容体 / アデノシン受容体 / 社会的エンリッチメント / 飼育環境 / 社会的再認記憶 / 養育環境
Outline of Research at the Start

本研究では,幼少期の社会的エンリッチメント環境(多頭飼育)が,その後のラットの社会的・非社会的記憶能力にどのような影響を及ぼすのか,またそれに関わる神経メカニズムを解明することを目的とする。実験1では自発的物体・社会的再認記憶課題を用いて離乳直後からの多頭飼育がラットの記憶容量に及ぼす影響を検討する。実験2では,記憶負荷が異なる場合の物体・社会的再認記憶に関与する脳部位をc-Fos免疫陽性細胞の観察により特定する。実験3では薬理遺伝学的手法を用いて,実験2で特定された脳部位の神経細胞を活性化あるいは抑制することで,物体・社会的再認記憶にどのような影響をみられるのかを検討する。

Outline of Final Research Achievements

We investigated whether social enrichment could affect rats’ memory ability using the “Different Objects Task (DOT),” in which the levels of memory load could be modulated by changing the number of objects to be remembered. In addition, we applied the DOT to a social discrimination task using unfamiliar conspecific juveniles instead of objects. Our data showed that (1) social enrichment can enhance social, but not object, memory span, (2) hippocampal CA2 is involved in the formation of social memory, while the dorsal dentate gyrus is involved in processing contextual information.

Academic Significance and Societal Importance of the Research Achievements

集団の中で常に他者との関係性を維持しながら生きていく我々人間にとって,他者の記憶ともいえる社会的記憶は,健康的な生活を送る上で非常に重要な機能である。しかしながら,我々を含めてこれまで数多く行われてきた記憶研究において,社会的記憶に焦点を当てたものは数少なく,養育環境が社会的記憶に影響を及ぼすこと及び社会的記憶形成にも海馬の一部が関与していることを明らかにした本研究の成果は,認知症などにみられる社会的健忘の治療だけでなく効果的な予防法の開発につながることが期待できる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (16 results)

All 2021 2020 2019 Other

All Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (8 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results) Remarks (3 results)

  • [Journal Article] Long-term associative memory in rats: Effects of familiarization period in object-place-context recognition test2021

    • Author(s)
      Shimoda Shota、Ozawa Takaaki、Ichitani Yukio、Yamada Kazuo
    • Journal Title

      PLoS ONE

      Volume: 16 Issue: 7 Pages: e0254570-e0254570

    • DOI

      10.1371/journal.pone.0254570

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Pharmacologically induced N‐methyl‐D‐aspartate receptor hypofunction impairs goal‐directed food seeking in rats2021

    • Author(s)
      Ozawa Takaaki、Itokazu Tatsumi、Ichitani Yukio、Yamada Kazuo
    • Journal Title

      Neuropsychopharmacology Reports

      Volume: 41 Issue: 4 Pages: 526-531

    • DOI

      10.1002/npr2.12209

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Prior stress experience modulates social preference for stressed conspecifics in male rats2021

    • Author(s)
      Toyoshima Michimasa、Mitsui Koshiro、Yamada Kazuo
    • Journal Title

      Neuroscience Letters

      Volume: 765 Pages: 136253-136253

    • DOI

      10.1016/j.neulet.2021.136253

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] D-Cycloserine reverses scopolamine-induced object and place memory deficits in a spontaneous recognition paradigm in rats2019

    • Author(s)
      Ozawa Takaaki、Yamada Kazuo、Ichitani Yukio
    • Journal Title

      Pharmacology Biochemistry and Behavior

      Volume: 187 Pages: 172798-172798

    • DOI

      10.1016/j.pbb.2019.172798

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Differential effects of N-methyl-D-aspartate receptor blockade during the second and third postnatal weeks on spatial working and reference memory in adult rats2019

    • Author(s)
      Furuie Hiroki、Yamada Kazuo、Ichitani Yukio
    • Journal Title

      Brain Research

      Volume: 1721 Pages: 146339-146339

    • DOI

      10.1016/j.brainres.2019.146339

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Direct and indirect prior stress exposure modulates preference for stressed conspecifics in male rats.2021

    • Author(s)
      Toyoshima, M., Okuda, E. & Yamada, K.
    • Organizer
      Society for Behavioral Neuroendocrinology, 25th Annual Meeting
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Acute social isolation increases rats’ social motivation toward their cage mates: Implications for a rodent model of a loneliness-like state.2021

    • Author(s)
      Toyoshima, M. & Yamada, K.
    • Organizer
      Tsukuba Global Science Week 2020
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Rats can remember a specific "roommate": A novel behavioral test using sensory preconditioning to assess individual recognition in rats.2021

    • Author(s)
      Toyoshima, M. & Yamada., K.
    • Organizer
      日本動物心理学会第81回大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Acute social isolation increases rats’ social motivation toward their cage mates: Implications for a rodent model of a loneliness-like state.2020

    • Author(s)
      Toyoshima, M. & Yamada, K.
    • Organizer
      Tsukuba Global Science Week 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 孤独感のげっ歯類モデル確立に向けた試み:急性の社会的隔離がもたらす社会的動機づけの変化と関連脳領域の解析2020

    • Author(s)
      豊島理公・山田一夫
    • Organizer
      日本行動神経内分泌研究会
    • Related Report
      2020 Research-status Report
  • [Presentation] ラットの時間的順序記憶における内側前頭前野グルタミン酸受容体の役割2020

    • Author(s)
      椙田麻菜美・山田一夫・一谷幸男
    • Organizer
      日本生理心理学会第38回大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Effects of adenosine receptor antagonism on fear extinction in rats.2020

    • Author(s)
      Kaseda, K., Ozawa, T., Ichitani, Y. & Yamada, K.
    • Organizer
      日本神経科学会第43回大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Hippocampal NMDA receptors are involved in non-spatial memory only under high memory load condition in rats.2019

    • Author(s)
      Yamada, K., Sugita, M., Iwamura, E. & Ichitani, Y.
    • Organizer
      The Third Sino-Japan Symposium on the Frontier of Behavioral Neuroendocrinology
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Remarks] 筑波大学大学院人間総合科学学術院ニューロサイエンス学位プログラム 山田研究室

    • URL

      http://www.kansei.tsukuba.ac.jp/~ichitanilab/

    • Related Report
      2021 Annual Research Report
  • [Remarks] 筑波大学大学院人間総合科学学術院ニューロサイエンス学位プログラム行動神経科学グループ山田研究室

    • URL

      http://www.kansei.tsukuba.ac.jp/~ichitanilab/

    • Related Report
      2020 Research-status Report
  • [Remarks] 筑波大学大学院 人間総合科学研究科 感性認知脳科学専攻 行動神経科学分野 一谷・山田グループ

    • URL

      http://www.kansei.tsukuba.ac.jp/~ichitanilab/

    • Related Report
      2019 Research-status Report

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Published: 2019-07-04   Modified: 2023-01-30  

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