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Mechanisms of memory formation and generation of adaptive behavior

Research Project

Project/Area Number 19K06952
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 46030:Function of nervous system-related
Research InstitutionThe University of Tokyo

Principal Investigator

Kunitomo Hirofumi  東京大学, 大学院理学系研究科(理学部), 准教授 (20302812)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords記憶と学習 / 線虫 / 化学感覚 / シナプス / 塩化物イオンチャネル / 神経ペプチド / 走化性 / 塩走性 / 味覚 / ClCチャネル / 適応行動 / シナプス可塑性
Outline of Research at the Start

記憶と学習は健康的な生活を支える高次脳機能であり、それらのメカニズムの解明は神経科学の重要課題である。同様の能力は生存と繁殖に必須なため、比較的単純な動物にも備わっている。土壌に生息する線虫は環境の塩濃度と餌の有無を関連付けて記憶し、その後の探索行動を調節する。この学習では、過去に経験した塩濃度の履歴は、ジアシルグリセロールと呼ばれるシグナル分子の量の変化として1個の味覚神経細胞に記憶される。本研究では、線虫の味覚学習における味覚神経の役割と記憶・学習に必要な神経回路の動作機構を遺伝子・タンパク質レベルで解明し、脳・神経系が適応行動を作り出す動作原理を明らかにする。

Outline of Final Research Achievements

Learning and memory are the abilities necessary for an organism to adapt to its environment and successfully reproduce. It is not fully understood what physiological changes in the brain occur when memories are formed depending on experience and behavior is modulated based on those memories. To address this at the genetic level, we investigated the mechanism of taste learning in the nematode C. elegans. We revealed the regulatory mechanisms of the neural circuit that play a pivotal role in behavioral control and reported a new mechanism of synaptic plasticity. We also revealed the roles of genetic pathways required for taste learning.

Academic Significance and Societal Importance of the Research Achievements

神経細胞間の情報伝達の変化は、記憶や学習のしくみの一つと考えられている。本研究は線虫の味覚学習をモデルとして、感覚受容を担う味覚神経と、その情報を処理する介在神経との間の情報伝達が経験に依存して変化する機構を遺伝子レベルで明らかにした。また、線虫の学習に必要な新規遺伝子として、神経や筋の興奮性を調節する塩化物イオンチャネルを同定し、それが行動の制御に果たす役割を明らかにした。これらの遺伝子はヒトを含む多くの動物種で保存されている。本研究で明らかになった神経伝達調節機構や遺伝子の機能は、記憶と学習のしくみをより深く理解することに貢献した。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (22 results)

All 2023 2022 2021 2020 2019 Other

All Journal Article (8 results) (of which Peer Reviewed: 8 results,  Open Access: 8 results) Presentation (13 results) (of which Int'l Joint Research: 6 results) Remarks (1 results)

  • [Journal Article] Multiple p38/JNK mitogen-activated protein kinase (MAPK) signaling pathways mediate salt chemotaxis learning in C. elegans2023

    • Author(s)
      Huang, T., Suzuki, K., Kunitomo, H., Tomioka, M., and Iino, Y.
    • Journal Title

      G3: Genes|Genomes|Genetics

      Volume: 13 Issue: 9

    • DOI

      10.1093/g3journal/jkad129

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Different modes of stimuli delivery elicit changes in glutamate driven, experience-dependent interneuron response in C. elegans2023

    • Author(s)
      Mabardi Llian、Sato Hirofumi、Toyoshima Yu、Iino Yuichi、Kunitomo Hirofumi
    • Journal Title

      Neuroscience Research

      Volume: 186 Pages: 33-42

    • DOI

      10.1016/j.neures.2022.10.004

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Caenorhabditis Elegans Exhibits Morphine Addiction-like Behavior via the Opioid-like Receptor NPR-172022

    • Author(s)
      Ide Soichiro、Kunitomo Hirofumi、Iino Yuichi、Ikeda Kazutaka
    • Journal Title

      Frontiers in Pharmacology

      Volume: 12 Pages: 802701-802701

    • DOI

      10.3389/fphar.2021.802701

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Glutamate signaling from a single sensory neuron mediates experience-dependent bidirectional behavior in Caenorhabditis elegans2021

    • Author(s)
      Sato Hirofumi、Kunitomo Hirofumi、Fei Xianfeng、Hashimoto Koichi、Iino Yuichi
    • Journal Title

      Cell Reports

      Volume: 35 Issue: 8 Pages: 109177-109177

    • DOI

      10.1016/j.celrep.2021.109177

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Simultaneous recording of behavioral and neural responses of free-moving nematodes C.?elegans2021

    • Author(s)
      Sato Hirofumi、Kunitomo Hirofumi、Fei Xianfeng、Hashimoto Koichi、Iino Yuichi
    • Journal Title

      STAR Protocols

      Volume: 2 Issue: 4 Pages: 101011-101011

    • DOI

      10.1016/j.xpro.2021.101011

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Roles of the ClC chloride channel CLH-1 in food-associated salt chemotaxis behavior of C. elegans2021

    • Author(s)
      Park Chanhyun、Sakurai Yuki、Sato Hirofumi、Kanda Shinji、Iino Yuichi、Kunitomo Hirofumi
    • Journal Title

      eLife

      Volume: 10 Pages: 1-27

    • DOI

      10.7554/elife.55701

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Caenorhabditis elegans che-5 is allelic to gcy-222020

    • Author(s)
      Kunitomo Hirofumi、Iino Yuichi
    • Journal Title

      MicroPubl Biol.

      Volume: -

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Multiple Sensory Neurons Mediate Starvation-Dependent Aversive Navigation in Caenorhabditis elegans2019

    • Author(s)
      Jang MS, Toyoshima Y, Tomioka M, Kunitomo H, Iino Y.
    • Journal Title

      Proc Natl Acad Sci U S A .

      Volume: 116 Issue: 37 Pages: 18673-18683

    • DOI

      10.1073/pnas.1821716116

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Dye-uptake of amphid neurons enhances phototaxis behavior in a LITE-1 dependent manner2023

    • Author(s)
      Hirofumi Kunitomo, Masayoshi Kuroda, Yuichi Iino
    • Organizer
      24th International C. elegans Conference
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Classification of C. elegans behaviors based on centroid movement and posture analyses2023

    • Author(s)
      Koyo Kuze, Karin Suwazono, Midori Wakana, Moon Sun Jang, Hirofumi Kunitomo, Yu Toyoshima, Yuichi Iino
    • Organizer
      24th International C. elegans Conference
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] FMRFamide-like neuropeptide FLP-2 may modulate salt chemotaxis of C. elegans by mediating food signals2022

    • Author(s)
      Yucheng Xie, Koji Yamada, Takeshi Adachi, Hirofumi Kunitomo, Yuichi Iino
    • Organizer
      NEURO2022(第45回日本神経科学大会・第65回日本神経化学会大会・第32回日本神経回路学会大会 合同大会)
    • Related Report
      2022 Research-status Report
  • [Presentation] FMRFamide-like neuropeptide FLP-2 and pigment dispersing factor-like neuropeptide PDF-1 may modulate salt chemotaxis of C. elegans by mediating food signals2022

    • Author(s)
      Yucheng Xie, Koji Yamada, Takeshi Adachi, Hirofumi Kunitomo, Yuichi Iino
    • Organizer
      CeNeuro2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Roles of the nlp-3 neuropeptide gene in salt chemotaxis in C. elegans.2021

    • Author(s)
      児玉未来、安達健、山田康嗣、飯野雄一、國友博文
    • Organizer
      線虫研究の未来を創る会2021
    • Related Report
      2021 Research-status Report
  • [Presentation] ASEL神経における塩応答機構の解明2021

    • Author(s)
      Sayako Satomi, Hirofumi Kunitomo, Yuichi Iino
    • Organizer
      線虫研究の未来を創る会2021
    • Related Report
      2021 Research-status Report
  • [Presentation] 塩走性に働く神経ペプチドの同定と機能の解明2021

    • Author(s)
      Yucheng Xie, Koji Yamada, Takeshi Adachi, Hirofumi Kunitomo, Yuichi Iino
    • Organizer
      線虫研究の未来を創る会2021
    • Related Report
      2021 Research-status Report
  • [Presentation] 線虫の塩走性におけるnlp-3の役割の解明2020

    • Author(s)
      児玉未来、安達健、山田康嗣、飯野雄一、國友博文
    • Organizer
      第43回日本分子生物学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Molecular and neural mechanisms of salt concentration memory-dependent chemotaxis of Caenorhabditis elegans2019

    • Author(s)
      Hirofumi Kunitomo, Hirofumi Sato, Hinako Mitsui, Yuichi Iino
    • Organizer
      48th Naito Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 線虫の塩濃度走性に関与する神経ペプチドの同定2019

    • Author(s)
      國友博文、山田康嗣、安達健、飯野雄一
    • Organizer
      第42回日本分子生物学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Multiple sensory neurons mediate starvation-dependent aversive navigation in Caenorhabditis elegans.2019

    • Author(s)
      Moon Sun Jang, Yu Toyoshima, Masahiro Tomioka, Hirofumi Kunitomo*, Yuichi Iino*
    • Organizer
      22th International C. elegans Meeting
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Neural dynamics for bidirectional regulation of experience-dependent gustatory behavior.2019

    • Author(s)
      H. Sato, H. Kunitomo, X. Fei, K. Hashimoto, Y. Iino
    • Organizer
      22th International C. elegans Meeting
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 経験塩濃度依存的な行動を制御する神経回路の動態2019

    • Author(s)
      佐藤博文、國友博文、Xianfeng Fei、橋本浩一、飯野雄一
    • Organizer
      第42回日本分子生物学会年会
    • Related Report
      2019 Research-status Report
  • [Remarks] 飢餓を感知する感覚神経は新たな行動戦略を生み出す

    • URL

      https://www.s.u-tokyo.ac.jp/ja/press/2019/6508/

    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2025-01-30  

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