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A novel therapeutic strategy for ischemic stroke based on reshaping neuronal circuits in an activity-dependent manner

Research Project

Project/Area Number 19K22687
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 56:Surgery related to the biological and sensory functions and related fields
Research InstitutionOsaka University

Principal Investigator

Tsuboi Akio  大阪大学, 大学院生命機能研究科, 招へい教授 (20163868)

Co-Investigator(Kenkyū-buntansha) 高橋 弘雄  香川大学, 医学部, 講師 (20390685)
森 英一朗  奈良県立医科大学, 医学部, 准教授 (70803659)
Project Period (FY) 2019-06-28 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords神経科学 / 神経可塑性 / 脳神経疾患 / 脳梗塞モデルマウス / 神経活動依存性 / 神経保護 / 転写因子 / 低分子量Gタンパク質 / 脳・神経 / 再生医学 / ニューロン細胞死 / 脳血管障害 / 神経細胞保護 / 新規治療法開発 / 神経活動依存的 / 転写因子Npas4
Outline of Research at the Start

脳梗塞モデルマウスやラットを用いた国内外の研究により、梗塞巣の大きさに影響を及ぼす複数の遺伝子が同定された。しかし多くの研究は梗塞から24時間以上経過して梗塞巣が形成された後、又は、そこからの回復過程に着目しており、脳梗塞の発症直後のニューロンで生じる遺伝子発現の変動やその生理的な意義は,明らかにされていない。

申請者らは、脳梗塞モデルマウスを用いて、RNA-Seq解析により網羅的に探索した結果、梗塞2時間後に顕著に発現が変化するNpas4を含む複数の遺伝子を獲得した。そこで本研究では、これら遺伝子の機能を解析することにより、脳梗塞後に生じるニューロンの細胞死を抑制し、生存を促進する機構を解明する。

Outline of Final Research Achievements

Cerebrovascular diseases are the fourth most frequent cause of death in Japan. It is extremely important to study neuronal changes in the brain during the early stages of cerebral stroke, which accounts for a large proportion of these diseases, in order to develop effective therapies. We demonstrated that the transcription factor Npas4 (Cell Rep, 8, 2014), which promotes neuronal development in a stimulation-dependent manner in the healthy brain, also functions in the cerebral cortex after cerebral ischemia to prevent the expansion of infarct foci and to improve prognostic motor function (PNAS, 118, 2021). This study elucidates the mechanism by which Npas4 promotes neuroprotection from cell death via the small G-protein Gem, which is expected to result in a target for innovative therapeutics.

Academic Significance and Societal Importance of the Research Achievements

転写因子Npas4は健常脳と病態脳の双方において、神経回路の再編を促進し、その破綻を抑制するのに重要な働きをする事が示唆されていた。本研究により、病態脳におけるNpas4が低分子量G蛋白質のGemを介して果たす役割が明らかになり、健常脳と病態脳における神経回路の再編機構の相違点に関して、Npas4の観点から考察する事が可能になった。
現在の脳梗塞治療法はt-PAを用いた血栓溶解療法など、「血流を速やかに回復して既存の神経回路を守る」という点に重点を置いたもので、出血傾向を有する患者には適用できない。Npas4下流のGemを標的とした新規治療薬は、出血傾向のある患者にも適用できると期待される。

Report

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

    (27 results)

All 2023 2022 2021 2020 2019 Other

All Journal Article (11 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (13 results) (of which Int'l Joint Research: 6 results,  Invited: 1 results) Remarks (2 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] 脳梗塞急性期において神経細胞死を防御する分子機構2023

    • Author(s)
      坪井昭夫,高橋弘雄
    • Journal Title

      Clinical Neuroscience

      Volume: 41 Pages: 280-283

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Molecular mechanisms underlying activity-dependent ischemic tolerance in the brain2023

    • Author(s)
      Takahashi H, Yamamoto Y, Tsuboi A
    • Journal Title

      Neuroscience Research

      Volume: 18 Pages: 3-9

    • DOI

      10.1016/j.neures.2022.10.005

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 脳梗塞の発症初期に発現する転写因子Npas4が神経細胞死を防ぐ分子機構2022

    • Author(s)
      坪井昭夫
    • Journal Title

      BIO Clinica

      Volume: 37 Pages: 1057-1059

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Ras-like Gem GTPase induced by Npas4 promotes activity-dependent neuronal tolerance for ischemic stroke2021

    • Author(s)
      Takahashi Hiroo、Asahina Ryo、Fujioka Masayuki、Matsui Takeshi K.、Kato Shigeki、Mori Eiichiro、Hioki Hiroyuki、Yamamoto Tohru、Kobayashi Kazuto、Tsuboi Akio
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 118 Issue: 32 Pages: 66-72

    • DOI

      10.1073/pnas.2018850118

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 刺激の豊かな環境で過ごしたマウスは脳梗塞にかかっても軽症ですむ?2021

    • Author(s)
      坪井昭夫、高橋弘雄
    • Journal Title

      実験医学

      Volume: 39 Pages: 3042-3045

    • Related Report
      2021 Research-status Report
  • [Journal Article] 脳梗塞時に神経細胞死を防御する機構の解明とその革新的な治療法への応用2020

    • Author(s)
      坪井昭夫
    • Journal Title

      BIO Clinica

      Volume: 35

    • Related Report
      2020 Research-status Report
  • [Journal Article] LRR-Containing Oncofetal Trophoblast Glycoprotein 5T4 Shapes Neural Circuits in Olfactory and Visual Systems2020

    • Author(s)
      Tsuboi Akio
    • Journal Title

      Frontiers in Molecular Neuroscience

      Volume: 13 Pages: 581018-581018

    • DOI

      10.3389/fnmol.2020.581018

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 脳梗塞時に脳を守る潜在的な適応機構の解明とその革新的な治療法への応用2020

    • Author(s)
      坪井昭夫
    • Journal Title

      Precision Medicine

      Volume: 3

    • Related Report
      2020 Research-status Report
  • [Journal Article] Expression of Oncofetal Antigen 5T4 in Murine Taste Papillae.2019

    • Author(s)
      Takahashi Y, Takahashi H*, Stern PL, Kirita T, Tsuboi A*
    • Journal Title

      Frontiers in Cellular Neuroscience

      Volume: 13 Pages: 343-343

    • DOI

      10.3389/fncel.2019.00343

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 総説 嗅球における特定の介在ニューロンの機能的な役割2019

    • Author(s)
      髙橋 弘雄、坪井 昭夫
    • Journal Title

      The Japanese Journal of Taste and Smell Research

      Volume: 26 Issue: 1 Pages: 3-8

    • DOI

      10.18965/tasteandsmell.26.1_3

    • NAID

      130007649391

    • ISSN
      1340-4806, 2424-1326
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] 内在性の神経回路再編機構の理解に基づく革新的な脳梗塞治療法の開発2019

    • Author(s)
      坪井 昭夫、高橋 弘雄
    • Journal Title

      Medical Science Digest

      Volume: 45 Pages: 152-154

    • Related Report
      2019 Research-status Report
  • [Presentation] Ras-like GTPase induced by Npas4 promotes activity-dependent tolerance for ischemic stroke2022

    • Author(s)
      坪井昭夫
    • Organizer
      第15回神経発生討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Ras-like Gem GTPase induced by Npas4 promotes activity-dependent tolerance for ischemic stroke2022

    • Author(s)
      Akio Tsuboi, Takeshi K. Matsui, Eiichiro Mori, Satoru Yamamoto, Hiroo Takahashi
    • Organizer
      Cortical Development Conference 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ras-like Gem GTPase induced by Npas4 promotes activity-dependent neuronal tolerance for ischemic stroke2022

    • Author(s)
      H. Takahashi, A. Tsuboi
    • Organizer
      The 8th BRAIN Initiative Meeting: Open Science, New Tool
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Time-dependent neuroprotective mechanism for ischemic stroke2022

    • Author(s)
      高橋弘雄, 尾嶋大喜, 坪井昭夫, 山本融
    • Organizer
      第45回日本神経科学大会(NEURO2022)
    • Related Report
      2022 Annual Research Report
  • [Presentation] Npas4-induced expression of Gem GTPase promotes activity-dependent neuronal tolerance for ischemic stroke2022

    • Author(s)
      Akio Tsuboi, Hiroo Takahashi
    • Organizer
      第15回神経発生討論会(on-line 開催)
    • Related Report
      2021 Research-status Report
  • [Presentation] Npas4-induced expression of Gem GTPase promotes activity-dependent neuronal tolerance for ischemic stroke2021

    • Author(s)
      Akio Tsuboi, Hiroo Takahashi
    • Organizer
      7th Annual BRAIN Initiative Investigators Meeting (on-line)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Ras-like Gem GTPase induced by Npas4 promotes activity-dependent tolerance for ischemic stroke2021

    • Author(s)
      Takahashi H, Matsui TK, Mori E, Yamamoto T, Tsuboi A
    • Organizer
      第44回日本神経科学会大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Ras-like GTPase induced by Npas4 promotes activity-dependent tolerance for ischemic stroke2020

    • Author(s)
      Tsuboi A, Matsui TK, Mori E, Yamamoto T, Takahashi H.
    • Organizer
      第43回日本分子生物学会大会(on-line開催)
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Ras-like GTPase induced by Npas4 promotes activity-dependent tolerance for ischemic stroke2020

    • Author(s)
      Takahashi H, Matsui TK, Mori E, Yamamoto T, Tsuboi A.
    • Organizer
      第43回日本神経科学大会(on-line開催)
    • Related Report
      2020 Research-status Report
  • [Presentation] 5T4 oncofetal trophoblast glycoprotein plays a role for maintaining taste buds in mice2019

    • Author(s)
      Tsuboi A, Takahashi Y, Kirita T, Takahashi H
    • Organizer
      The 48th Naito Conference on Integrated Sensory Sciences - Pain, Itch, Smell and Taste
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Activity-dependent transcription factor Npas4 plays a crucial role in neuronal survival after ischemic stroke2019

    • Author(s)
      Tsuboi A, Takahashi H
    • Organizer
      29th Annual Meeting of the European Chemoreception Research Organization (ECRO2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Sensory activity-dependent transcription factor Npas4 plays a crucial role in neuronal survival after ischemic stroke2019

    • Author(s)
      Takahashi H, Asahina R, Yamamoto T, Tsuboi A
    • Organizer
      第42回日本神経科学大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Activity-dependent transcription factor Npas4 plays a crucial role in neuronal survival after ischemic stroke2019

    • Author(s)
      Tsuboi A, Takahashi H
    • Organizer
      Keystone Symposia on Neurodegenerative Diseases: New Insights and Therapeutic Opportunities
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Remarks] 大阪大学大学院生命機能研究科 TSUBOI LAB

    • URL

      http://tsuboi-lab.osaka1univ2fbs3.jp/

    • Related Report
      2021 Research-status Report
  • [Remarks] 大阪大学大学院生命機能研究科 坪井研究室

    • URL

      http://osaka-univ-tsuboi-lab.jp/

    • Related Report
      2020 Research-status Report
  • [Patent(Industrial Property Rights)] 脳梗塞の予防又は治療剤2019

    • Inventor(s)
      坪井昭夫、高橋弘雄
    • Industrial Property Rights Holder
      坪井昭夫、高橋弘雄
    • Industrial Property Rights Type
      特許
    • Filing Date
      2019
    • Related Report
      2019 Research-status Report

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Published: 2019-07-04   Modified: 2024-01-30  

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