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Diversity of CA1 synapses and the self-entropy analysis after contexual learning

Research Project

Project/Area Number 16H05129
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental physiology(including physical medicine and nutritional physiology)
Research InstitutionYamaguchi University

Principal Investigator

MITSUSHIMA Dai  山口大学, 大学院医学系研究科, 教授 (70264603)

Co-Investigator(Kenkyū-buntansha) 石川 淳子  山口大学, 大学院医学系研究科, 助教 (30570808)
崎本 裕也  山口大学, 大学院医学系研究科, 助教 (40634390)
木田 裕之  山口大学, 大学院医学系研究科, 講師 (70432739)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2018: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2017: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2016: ¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000)
Keywordslearning and memory / GABAA receptor / AMPA receptor / GABA / glutamate / synaptic plasticity / information theory / self-entropy / AMPA受容体 / GABAA受容体 / 学習・記憶 / contextual learning / シナプス可塑性 / entropy / diversity / 学習、記憶 / グルタミン酸 / 海馬学習 / リップル / super burst / CA1 / stress
Outline of Final Research Achievements

First, we examined contextual learning-induced synaptic diversity onto CA1 pyramidal neurons. By analyzing self-entropy of synaptic diversity in the neurons, we specified central region of contextual learning in both hemisphere of dorsal CA1. As to the temporal dynamics, learning rapidly induced postsynaptic plasticity at GABAA receptor-mediated inhibitory synapses within 1 min, and AMPA receptor-mediated excitatory synapses were followed within 5 min after the training.
Next, we used 4 different type of episodes to examine whether the synaptic plasticity or in vivo multiple-unit firings was episode-specific. Here we found episode-specific features of plasticity at excitatory and inhibitory synapses and in vivo ripple-like firings of CA1 neurons.

Academic Significance and Societal Importance of the Research Achievements

海馬はエピソード記憶の形成に必要不可欠の領域であるが、情報処理のルールは全く不明であった。本研究ではじめて、経験エピソード特異的なシナプス多様化と、その結果多ニューロンで再現されるリップル様発火活動を明らかにした。今後は、抽出されたリップル様発火活動の数千パラメータをAI機械学習により網羅解析し、「どのパラメータが何の経験に対応し、何を意味するか」「経験内容を読解可能か」など具体的な符号化ルール解明を目指す。現時点で脳内の符号化ルールは全く不明の未踏領域であるが、脳情報の解読は、医学・生理学に今世紀ブレークスルーをもたらす最重要課題の1つであるに違いない。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (19 results)

All 2019 2018 2017 2016 Other

All Journal Article (11 results) (of which Peer Reviewed: 10 results,  Open Access: 11 results,  Acknowledgement Compliant: 1 results) Remarks (8 results)

  • [Journal Article] Learning promotes subfield-specific synaptic diversity in hippocampal CA1 neurons.2019

    • Author(s)
      Sakimoto Y, Mizuno J, Kida H, Kamiya Y, Ono Y, Mitsushima D.
    • Journal Title

      Cerebral Cortex

      Volume: in press Issue: 5 Pages: 2183-2195

    • DOI

      10.1093/cercor/bhz022

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] FABP3 in the Anterior Cingulate Cortex Modulates the Methylation Status of the Glutamic Acid Decarboxylase67 Promoter Region2018

    • Author(s)
      Yamamoto Yui、Kida Hiroyuki、Kagawa Yoshiteru、Yasumoto Yuki、Miyazaki Hirofumi、Islam Ariful、Ogata Masaki、Yanagawa Yuchio、Mitsushima Dai、Fukunaga Kohji、Owada Yuji
    • Journal Title

      The Journal of Neuroscience

      Volume: 38 Issue: 49 Pages: 10411-10423

    • DOI

      10.1523/jneurosci.1285-18.2018

    • NAID

      130007813353

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Reduction of spike generation frequency by cooling in brain slices from rats and from patients with epilepsy.2018

    • Author(s)
      Nomura S & Kida H, Hirayama Y, Imoto H, Inoue T, Moriyama H, Mitsushima D, Suzuki M.
    • Journal Title

      J Cerebr Blood F Met.

      Volume: - Issue: 11 Pages: 1-1

    • DOI

      10.1177/0271678x18795365

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Mechanisms of motor learning mediated by synaptic plasticity in rat primary motor cortex.2017

    • Author(s)
      Kida Hiroyuki、Mitsushima Dai.
    • Journal Title

      Neurosci Res

      Volume: 128 Pages: 14-18

    • DOI

      10.1016/j.neures.2017.09.008

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Slice Patch Clamp Technique for Analyzing Learning-Induced Plasticity2017

    • Author(s)
      Kida Hiroyuki、Sakimoto Yuya、Mitsushima Dai
    • Journal Title

      Journal of Visualized Experiments

      Volume: 129 Issue: 129 Pages: 1-11

    • DOI

      10.3791/55876

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Learning-Induced Synaptic Diversity and Quantification of Intra-Hippocampal Entropy2017

    • Author(s)
      Mitsushima Dai
    • Journal Title

      Journal of Psychology & Clinical Psychiatry

      Volume: 8 Issue: 1 Pages: 1-4

    • DOI

      10.15406/jpcpy.2017.08.00471

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Synaptic diversity and quantification of intra-hippocampal contextual memory.2017

    • Author(s)
      Mitsushima Dai
    • Journal Title

      Neurol Neurother

      Volume: 2 Pages: 1-5

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 記憶情報の定量と解読を目指して2017

    • Author(s)
      美津島 大
    • Journal Title

      日本生殖内分泌学会雑誌

      Volume: 22 Pages: 49-51

    • NAID

      40021321585

    • Related Report
      2017 Annual Research Report
    • Open Access
  • [Journal Article] Motor training promotes both synaptic and intrinsic plasticity of layer II/III pyramidal neurons in the primary motor cortex.2016

    • Author(s)
      Kida H, Tsuda Y, Ito N, Yamamoto Y, Owada Y, Kamiya Y, Mitsushima D.
    • Journal Title

      Cerebral Cortex

      Volume: in press Issue: 8 Pages: 3494-507

    • DOI

      10.1093/cercor/bhw134

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Astrocyte-expressed FABP7 regulates dendritic morphology and excitatory synaptic function of cortical neurons.2016

    • Author(s)
      Ebrahimi M, Yamamoto Y, Sharifi K, Kida H, Kagawa Y, Yasumoto Y, Islam A, Miyazaki H, Shimamoto C, Maekawa M, Mitsushima D, Yoshikawa T, Owada Y.
    • Journal Title

      Glia

      Volume: 64(1) Issue: 1 Pages: 48-62

    • DOI

      10.1002/glia.22902

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Examination of configural association theory and conflict resolution model through hippocampal theta activity2016

    • Author(s)
      Sakimoto Y, Mitsushima D
    • Journal Title

      Neurotransmitter

      Volume: 3 Pages: 1-8

    • DOI

      10.14800/nt.1478

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access
  • [Remarks] Learning Promotes Synaptic Diversity

    • URL

      https://academic.oup.com/cercor/article/29/5/2183/5364044

    • Related Report
      2018 Annual Research Report
  • [Remarks] 日本生理学会 Science Topics

    • URL

      http://physiology.jp/science-topic/22081/

    • Related Report
      2018 Annual Research Report
  • [Remarks] Dept. of Physiology, Yamaguchi Univ.

    • URL

      http://ds.cc.yamaguchi-u.ac.jp/~seiri2/e-index.html

    • Related Report
      2017 Annual Research Report
  • [Remarks] 山口大学大学院医学系研究科神経生理学講座

    • URL

      http://ds.cc.yamaguchi-u.ac.jp/~seiri2/index.html

    • Related Report
      2017 Annual Research Report
  • [Remarks] 木田裕之助教と美津島大教授らの研究グループが運動学習の脳内メカニズムを解明!

    • URL

      http://www.yamaguchi-u.ac.jp/weeklynews/2016/_5155.html

    • Related Report
      2017 Annual Research Report 2016 Annual Research Report
  • [Remarks] 日本生殖内分泌学会雑誌 Vol.22 (2017)

    • URL

      http://jsre.umin.jp/zassi.html

    • Related Report
      2017 Annual Research Report
  • [Remarks] 運動学習の脳内メカニズムを解明 ~ トレーニングによる運動野神経回路の多様化 ~

    • URL

      http://www.yamaguchi-u.ac.jp/library/user_data/upload/Image/news/2016/16051802.pdf

    • Related Report
      2016 Annual Research Report
  • [Remarks] 山口大学医学部神経生理学講座ホームページ

    • URL

      http://ds.cc.yamaguchi-u.ac.jp/~seiri2/

    • Related Report
      2016 Annual Research Report

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Published: 2016-04-21   Modified: 2020-10-30  

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