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Roles for intraventricular pressure in brain development

Research Project

Project/Area Number 21K06190
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 44020:Developmental biology-related
Research InstitutionKumamoto University

Principal Investigator

Shimamura Kenji  熊本大学, 発生医学研究所, 教授 (70301140)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords脳発生 / 神経幹細胞 / 力学刺激 / 細胞増殖・分化 / 脳脊髄液 / 脳室内圧 / 細胞間張力
Outline of Research at the Start

脳発生において、神経幹細胞は自己増殖したのち、ニューロンやグリアを産生する。このプロセスについて、エピゲノム制御など神経幹細胞の内的要因に関する研究が進んでいるが、外的要因に関する研究は少なく、メカニズムの全容解明には至っていない。本研究では、神経幹細胞にかかる力学的作用として、脳脊髄液の液圧とそれに起因する細胞間の張力に注目し、神経幹細胞の増殖・分化に対する影響、脳発生に伴う脳室内圧、および張力の変化を明らかにする。力学変化によって神経幹細胞が増殖から分化モードへ移行し、脳室内圧の経時的変化が神経分化のタイマーとして寄与するという仮説を検証し、当該分野に全く新しい概念を創出する。

Outline of Final Research Achievements

This research aimed to understand mechanisms underlying transition from proliferation to differentiation phase of the neural stem cells (NSCs), which have a primary impact on the size of the brain. We investigated roles of physical stimuli exerted by the cerebrospinal fluid (CSF) in the brain ventricle in the regulation of embryonic NSC. We established methods to measure the internal pressure of the ventricle in the developing embryos. We also examined the impacts of the pressure alteration on proliferation and differentiation of the neural stem cells, finding that decline of the pressure facilitates the cells to shift the phases. These results suggest that physical stresses exerted by CSF play a critical role in the regulation of NSCs, which possibly influence the brain size.

Academic Significance and Societal Importance of the Research Achievements

脳の多様性をもたらした発生のしくみは、ヒトの脳の成り立ちの理解につながる点で学術的、社会的に関心が高い。神経幹細胞の増殖から分化への移行メカニズムは、エピゲノム制御などの内的要因、分泌シグナル等の外的要因が研究されているが、力学的要因に着目した本研究知見はこれに新たな展開をもたらす。一般に、発生現象における時間制御は、代謝等の生化学的反応に基づくしくみが知られているが、純粋に物理的要因によるしくみは画期的である。また、微小空間の微小圧力の計測法は、発生のみならず、疾患、損傷、臓器再生時の細胞を取り巻く物理的環境を明らかにし、オルガノイド作製などin vitroで再現するために有用である。

Report

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

    (12 results)

All 2024 2023 2022 2021

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (8 results) (of which Int'l Joint Research: 3 results,  Invited: 3 results)

  • [Journal Article] Tsukushi proteoglycan maintains RNA splicing and developmental signaling network in GFAP-expressing subventricular zone neural stem/progenitor cells2022

    • Author(s)
      Istiaq Arif、Umemoto Terumasa、Ito Naofumi、Suda Toshio、Shimamura Kenji、Ohta Kunimasa
    • Journal Title

      Frontiers in Cell and Developmental Biology

      Volume: 10

    • DOI

      10.3389/fcell.2022.994588

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Map7D2 and Map7D1 facilitate microtubule stabilization through distinct mechanisms in neuronal cells2022

    • Author(s)
      Kikuchi K, sakamoto S, Uezu A, Yamamoto H, Ishiguro K, Shimamura K, Saito T, Hisanaga S, Nakanishi H
    • Journal Title

      Life Science Alliance

      Volume: 5(8) Issue: 8 Pages: e202201390-e202201390

    • DOI

      10.26508/lsa.202201390

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Thalamocortical axons control the cytoarchitecture of neocortical layers by area-specific supply of VGF2022

    • Author(s)
      Sato Haruka、Hatakeyama Jun、Iwasato Takuji、Araki Kimi、Yamamoto Nobuhiko、Shimamura Kenji
    • Journal Title

      eLife

      Volume: 11 Pages: 67549-67549

    • DOI

      10.7554/elife.67549

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Two-Phase Lineage Specification of Telencephalon Progenitors Generated From Mouse Embryonic Stem Cells2021

    • Author(s)
      Nasu Makoto、Esumi Shigeyuki、Hatakeyama Jun、Tamamaki Nobuaki、Shimamura Kenji
    • Journal Title

      Frontiers in Cell and Developmental Biology

      Volume: 9 Pages: 632381-632381

    • DOI

      10.3389/fcell.2021.632381

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 脳を育むゆりかご「脳脊髄液」2024

    • Author(s)
      畠山淳、岡田咲耶、佐藤晴香、鈴木郁夫、岸雄介、岡野栄之、斎藤通紀、嶋村健児
    • Organizer
      第129回日本解剖学会総会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Extrinsic factors promoting cortical expansion in primates2023

    • Author(s)
      畠山淳、佐藤晴香、嶋村健児
    • Organizer
      第46回日本分子生物学会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Thalamocortical axons control the cytoarchitecture of neocortical layers by area-specific supply of VGF.2022

    • Author(s)
      Sato H, Hatakeyama J, Iwasato T, Araki K, Yamamoto N, Shimamura K.
    • Organizer
      Society of Neuroscience Annual Meeting 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Extrinsic factors nurturing neural stem cells2022

    • Author(s)
      Hatakeyama J, Sato H, Shimamura K.
    • Organizer
      第45回日本神経科学会
    • Related Report
      2022 Research-status Report
  • [Presentation] Extrinsic factors contributing crebral cortical expansion in primates2022

    • Author(s)
      Hatakeyama J, Sato H, Shimamura K.
    • Organizer
      第55回日本発生生物学会
    • Related Report
      2022 Research-status Report
  • [Presentation] Thalamocortical axons control the cytoarchitecture of nerocortical layers by area-specific supply of VGF.2022

    • Author(s)
      Sato H, Hatakeyama J, Iwasato T, Araki K, Yamamoto N, Shimamura K.
    • Organizer
      The International Symposium on Development and Plasticity of Neural Systems
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] The cradle of cerebrospinal fluids nurturing embryonic neural stem cells.2021

    • Author(s)
      Hatakeyama J, Sato H, Yoshimochi S, Matsushita R, Shimamura K.
    • Organizer
      International society for stem cell research
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Extrinsic factors promoting cortical expansion in primates.2021

    • Author(s)
      Hatakeyama J, Sato H, Shimamura K.
    • Organizer
      第44回日本分子生物学会
    • Related Report
      2021 Research-status Report
    • Invited

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

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