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Analysis of functional significance of postnatal neurogenesis with whole brain imagings

Research Project

Project/Area Number 21H02485
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 44020:Developmental biology-related
Research InstitutionKyoto University

Principal Investigator

Imayoshi Itaru  京都大学, 生命科学研究科, 教授 (60543296)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2023: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2022: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2021: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Keywordsニューロン新生 / 海馬 / 神経幹細胞 / 光操作 / 遺伝子発現 / 転写因子 / 光遺伝学 / 神経発生 / 神経可塑性 / 全脳イメージング / 記憶 / 学習
Outline of Research at the Start

哺乳類の脳神経系を構成するニューロンのほとんどは胎児発生期においてのみ産生されると考えられてきたが、近年の研究により、生後脳・成体脳にも神経幹細胞が存在し、特定の脳領域ではニューロンの新生が続いていることが明らかになってきた。ニューロン新生の機能的・生理的意義についても研究が進んでいるが、全脳レベルでの神経回路の発達・成熟・恒常性維持における生理的意義については未だ明らかになっておらず、本研究課題では、記憶痕跡細胞を蛍光標識できる遺伝子改変マウスと、全脳イメージングシステムを用いて解析を行う。

Outline of Final Research Achievements

Although most of the neurons consisting mammalian nervous system were thought to be produced only during embryonic development, recent studies have revealed that neural stem cells are present in the postnatal and adult brain, and that neurogenesis continues in the certain brain regions. The functional and physiological significance of postnatal neurogenesis has also been studied, but its physiological significance in the development, maturation, and homeostasis of neural circuits at the whole brain level has not yet been clarified. The results of this research project have revealed, in particular, the mechanism of how newborn neurons are involved in the process of memory forgetting and modification. In addition, we have successfully updated the method of optical manipulation of gene expression.

Academic Significance and Societal Importance of the Research Achievements

本申請課題で得られた研究成果により、生後脳・成体脳におけるニューロン新生が、哺乳類の脳神経回路の発達・成熟・恒常性維持においてどのような役割を担っているのかについて、その一端が全脳レベルで明らかになったとともに、ニューロン新生という現象の進化的意義や、将来の脳神経系の再生医療実現につながる新規知見が得られた。また、神経幹細胞の光操作のために開発した各種光作動性転写因子は、幹細胞の人工的操作に限らず、さまざまな生命科学や基礎医学研究に応用可能であると期待される。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (15 results)

All 2024 2023 2021

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (13 results) (of which Int'l Joint Research: 8 results,  Invited: 13 results)

  • [Journal Article] Scale Space Calibrates Present and Subsequent Spatial Learning in Barnes Maze in Mice2023

    • Author(s)
      Tachiki Yuto、Suzuki Yusuke、Kurahashi Mutsumi、Oki Keisuke、Mavuk Ozg?n、Nakagawa Takuma、Ishihara Shogo、Gyoten Yuichiro、Yamamoto Akira、Imayoshi Itaru
    • Journal Title

      eneuro

      Volume: 10 Issue: 6 Pages: 0-0

    • DOI

      10.1523/eneuro.0505-22.2023

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Enhancement of Vivid-based photo-activatable Gal4 transcription factor in mammalian cells2023

    • Author(s)
      Nagasaki, S.C., Fukuda, T.D., Yamada, M., Suzuki, Y.I., Kakutani, R., Guy, A.T. and *Imayoshi, I.
    • Journal Title

      Cell Structure and Function

      Volume: 48 Issue: 1 Pages: 31-47

    • DOI

      10.1247/csf.22074

    • ISSN
      0386-7196, 1347-3700
    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 動物個性の創発におけるニューロン新生の関与の可能性について2024

    • Author(s)
      今吉格
    • Organizer
      未踏探索における個性と集団の役割 Workshops 2024 Feb
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 光遺伝学ツールを使った神経幹細胞の分化制御メカニズムの解析2023

    • Author(s)
      今吉格
    • Organizer
      第46回日本分子生物学会年会
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 遺伝子発現の光制御手法を用いた神経幹細胞の制御メカニズムの解析2023

    • Author(s)
      今吉格
    • Organizer
      脳神経回路の形成・動作と制御の現在と未来
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Analysis of neural stem cell regulatory mechanisms using optogenetics2023

    • Author(s)
      今吉格
    • Organizer
      ASHBi Workshop "Towards engineering embryonic development"
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 神経幹細胞の分化運命決定を担う転写因子発現動態の光遺伝学的解析2023

    • Author(s)
      今吉格
    • Organizer
      第157回 Brain Club Seminar
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Analysis of neural stem cell regulatory mechanisms using optogenetics2023

    • Author(s)
      今吉格
    • Organizer
      Cellular Mechanisms of Learning and Memory
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Analysis of neural stem cell regulatory mechanisms using optogenetics2023

    • Author(s)
      今吉格
    • Organizer
      Intrenational Symposium on Neural Development and Diseases
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Enhancement of Vivid-based Photo-Activatable Gal4 Transcription Factor in Mammalian Cells.2023

    • Author(s)
      長崎真治、今吉格
    • Organizer
      第16回神経発生討論会
    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Invited
  • [Presentation] Analysis of neural stem cell regulatory mechanisms using optogenetics2023

    • Author(s)
      今吉格
    • Organizer
      Cellular mechanisms of learning and memoryシンポジウム
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Analysis of neural stem cell regulatory mechanisms using optogenetics2023

    • Author(s)
      今吉格
    • Organizer
      International Symposium on Neural Development and Diseases
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 高速超解像から大規模3Dまで、バイオイメージングを遍くカバーする最新顕微鏡技術群2021

    • Author(s)
      今吉 格
    • Organizer
      第44回日本神経科学大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Analysis of neural stem cell regulatory mechanisms using optogenetics2021

    • Author(s)
      今吉 格
    • Organizer
      第1回 CJK 国際会議
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Roles of postnatal and adult neurogenesis in brain development and maturation2021

    • Author(s)
      今吉 格
    • Organizer
      The 80th Fujihara Seminar
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited

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Published: 2021-04-28   Modified: 2025-01-30  

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