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Investigation of the Mechanisms Underlying the Differences in Cytoskeletal Assembly at Excitatory and Inhibitory Synapses

Research Project

Project/Area Number 20K16104
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 48010:Anatomy-related
Research InstitutionGunma University

Principal Investigator

Ichinose Sotaro  群馬大学, 大学院医学系研究科, 助教 (80775768)

Project Period (FY) 2020-04-01 – 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 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords抑制性シナプス / シナプトジェネシス / 微小管 / シナプスオーガナイザー / キネシン / 神経細胞骨格 / 接着因子 / 細胞内輸送 / 液-液相分離 / シナプス形成 / タンパク質結合 / 細胞骨格 / 細胞接着分子
Outline of Research at the Start

哺乳類の中枢神経系のシナプスは興奮性シナプスと抑制性シナプスに大別される。興奮性シナプスのシナプス後膜には様々なタンパク質が密集し、いわゆるシナプス後肥厚部が観察されるのに対し、抑制性シナプスのシナプス後膜におけるタンパク質の集積は顕著でない。さらに興奮性シナプスの大部分は樹状突起から突き出た区画であるスパイン上に形成されるのに対し、抑制性シナプスの大半は樹状突起のシャフトに形成される。本研究では興奮性および抑制性シナプス形成をそれぞれ誘導する細胞接着分子がどのようにしてこの細胞骨格の差異を生み出しているかを対比的に追究する。

Outline of Final Research Achievements

Research on the cytoskeleton that interacts with Teneurin-2, which localizes to both excitatory and inhibitory synapses, suggested that Teneurin-2 may interact with microtubules, although we did not obtain strong data indicating interaction with actin. While both actin and microtubules are present at inhibitory synapses, excitatory synapses are formed on structures called spines, which primarily consist of actin cytoskeleton. Therefore, we shifted our focus to investigate the detailed mechanisms of inhibitory synapse formation mediated by Teneurin-2. It was found that the interaction with microtubules via End binding protein (EB) promotes receptor accumulation.

Academic Significance and Societal Importance of the Research Achievements

興奮性シナプスと抑制性シナプスのバランス(E-Iバランス)は自閉症などの発達障害や統合失調症をはじめとする精神疾患との関連が指摘されており、近年盛んに研究されている。今回、われわれは新たなタンパク質相互作用による抑制性シナプス形成の詳細なメカニズムを解明した。今後、このタンパク質相互作用を変化させることのできる新薬を開発することで、シナプス形成を人為的にコントロールできるため、発達障害や精神疾患の治療への応用が期待される。

Report

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

    (19 results)

All 2023 2022 2021 2020 Other

All Journal Article (3 results) (of which Peer Reviewed: 2 results,  Open Access: 3 results) Presentation (14 results) (of which Int'l Joint Research: 11 results) Remarks (2 results)

  • [Journal Article] Interaction between Teneurin-2 and microtubules via EB proteins provides a platform for GABAA receptor exocytosis2023

    • Author(s)
      Ichinose Sotaro、Susuki Yoshihiro、Hosoi Nobutake、Kaneko Ryosuke、Ebihara Mizuho、Hirai Hirokazu、Iwasaki Hirohide
    • Journal Title

      eLife

      Volume: 12

    • DOI

      10.7554/elife.83276

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The two‐step cargo recognition mechanism of heterotrimeric kinesin2023

    • Author(s)
      Jiang Xuguang、Ogawa Tadayuki、Yonezawa Kento、Shimizu Nobutaka、Ichinose Sotaro、Uchihashi Takayuki、Nagaike Wataru、Moriya Toshio、Adachi Naruhiko、Kawasaki Masato、Dohmae Naoshi、Senda Toshiya、Hirokawa Nobutaka
    • Journal Title

      EMBO reports

      Volume: 24 Issue: 11

    • DOI

      10.15252/embr.202356864

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Teneurin-2 at the Synapse Construction Site is a Signpost for Cargo Unloading from Motor Proteins2022

    • Author(s)
      Ichinose Sotaro、Susuki Yoshihiro、Kaneko Ryosuke、Iwasaki Hirohide
    • Journal Title

      bioRxiv

      Volume: -

    • DOI

      10.1101/2022.09.13.507723

    • Related Report
      2022 Research-status Report
    • Open Access
  • [Presentation] 接着分子と細胞骨格分子による抑制性シナプス形成機序の解析2023

    • Author(s)
      一ノ瀬聡太郎, 岩﨑広英
    • Organizer
      第129回日本解剖学会総会・全国学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 接着分子テニューリン2の海馬における分子局在2023

    • Author(s)
      海老原瑞穂, 一ノ瀬聡太郎, 鈴木美博, 岩﨑広英
    • Organizer
      第129回日本解剖学会総会・全国学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] The two-step cargo recognition and binding mechanism of heterotrimeric kinesin2023

    • Author(s)
      X. Jiang, T. Ogawa, K. Yonezawa, N. Shimizu, S. Ichinose, T. Uchihashi, W. Nagaike, T. Moriya, N. Adachi, M. Kawasaki, N. Dohmae, T. Senda, N. Hirokawa
    • Organizer
      American Society for Cell Biology Annual Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Interaction Between Teneurin-2 and Microtubules via EB Proteins Provides a Platform for GABAAReceptor Exocytosis2023

    • Author(s)
      Sotaro Ichinose, Hirohide Iwasaki
    • Organizer
      American Society for Cell Biology Annual Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The interaction of Teneurin-2 with microtubules through end-binding proteins facilitates the accumulation of proteins at inhibitory postsynapses2023

    • Author(s)
      Sotaro Ichinose, Yoshihiro Susuki, Ryosuke Kaneko, Hirohide Iwasaki
    • Organizer
      第46回日本神経科学大会
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The interaction of Teneurin-2 with microtubules through end-binding proteins facilitates the accumulation of proteins at inhibitory postsynapses2023

    • Author(s)
      Sotaro Ichinose, Yoshihiro Susuki, Ryosuke Kaneko, Hirohide Iwasaki
    • Organizer
      The 49th Naito Conference
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 抑制性シナプスの多様性解析2023

    • Author(s)
      一ノ瀬 聡太郎, 岩﨑 広英
    • Organizer
      第128回日本解剖学会総会・全国学術集会
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Teneurin-2 at synapse construction site is a signpost for protein accumulation2022

    • Author(s)
      一ノ瀬 聡太郎, 岩﨑 広英
    • Organizer
      第45回日本神経科学大会
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 抑制性シナプスの多様性解析2022

    • Author(s)
      海老原 瑞穂, 一ノ瀬 聡太郎, 鈴木 美博, 岩﨑 広英
    • Organizer
      第110回 日本解剖学会 関東支部学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] シナプス構築部位におけるテニューリン2はタンパク質集積のための標しである2022

    • Author(s)
      一ノ瀬 聡太郎, 岩﨑 広英
    • Organizer
      第45回日本分子生物学会年会
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] The roles of teneruin-2 in neuron2022

    • Author(s)
      Sotaro Ichinose, Hirohide Iwasaki
    • Organizer
      第127回日本解剖学会総会・全国学術集会
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Teneurin-2 at Synapse construction site is a signpost for protein accumulation2022

    • Author(s)
      Sotaro Ichinose, Hirohide Iwasaki
    • Organizer
      第45回日本神経科学大会
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Role of microtubules on inhibitory synapse formation2021

    • Author(s)
      Sotaro Ichinose, Hirohide Iwasaki
    • Organizer
      日本神経科学大会
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] The roles of teneruin-2 in neuron2020

    • Author(s)
      Sotaro Ichinose, Hirohide Iwasaki
    • Organizer
      日本神経科学大会
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Remarks] 抑制性シナプス形成に必要な新たなタンパク質相互作用の同定に成功 ~接着分子と微小管の相互作用が鍵~

    • URL

      https://www.gunma-u.ac.jp/information/159650

    • Related Report
      2023 Annual Research Report
  • [Remarks] 神経細胞内の運び屋タンパク質が荷物を認識・安定化して輸送する仕組みを解明

    • URL

      https://www.med.gunma-u.ac.jp/news/11891

    • Related Report
      2023 Annual Research Report

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Published: 2020-04-28   Modified: 2025-01-30  

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