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Astrocytes form tight junctions to organize blood brain barrier

Research Project

Project/Area Number 21K15092
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 44010:Cell biology-related
Research InstitutionTeikyo University

Principal Investigator

Tanaka Hiroo  帝京大学, 医学部, 助教 (70795905)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2022: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords生体バリア / 血液脳関門 / 細胞間バリア / タイトジャンクション / クローディン / 生体恒常性 / 脳血管内皮細胞 / アストロサイト / 細胞間接着 / グリア細胞
Outline of Research at the Start

生体が有する最も強固なバリアシステムの一つとして血液脳関門(blood-brain barrier: BBB)が知られる。脳血管内皮細胞が構築する細胞間接着装置タイトジャンクション(Tight Junction: TJ)は、BBBの中心的な構成要素として注目されてきたが、申請者は最近、脳血管の周囲をくまなく覆う間葉系細胞のアストロサイトが、神経病態下にてTJを構築し、BBBを強化する可能性を見出した。
本研究では、アストロサイトにおける未知のTJ構築/制御原理と、それによる脳機能保護メカニズムを解明する。

Outline of Final Research Achievements

The blood-brain barrier (BBB) is known as one of the most robust barrier systems in living organisms. It is known that in BBB, tight junctions (TJs) seal the gaps between brain endothelial cells, functioning as a strong intercellular barrier. In this research, we have discovered that astrocytes, mesenchymal cells that thoroughly cover the surroundings of cerebral blood vessels, potentially construct TJs under neuropathological conditions, thereby strengthening the BBB. This research has revealed new evidence for the regulation of astrocyte-based BBB organization, providing novel strategic interventions for the BBB in neurological disorders.

Academic Significance and Societal Importance of the Research Achievements

本研究により、従来の脳血管内皮細胞を中心としてきたBBBの構築/制御原理に新機軸を生み出し、神経疾患に対する新規治療戦略の提示や、脳内へのドラッグデリバリーシステムの開発基盤の開拓につながった。また、クローディンを含む様々なTJ関連分子による細胞間バリア構築制御メカニズムも明らかにでき、TJの多様性構築原理の理解につながった。

Report

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

    (6 results)

All 2023 2021 2020 Other

All Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (1 results) (of which Invited: 1 results) Remarks (1 results)

  • [Journal Article] Double mutation of claudin-1 and claudin-3 causes alopecia in infant mice2023

    • Author(s)
      Suzuki Koya、Yamaga Kosuke、Tokumasu Reitaro、Katsuno Tatsuya、Tanaka Hiroo、Chiba Shuhei、Yagi Takeshi、Katayama Ichiro、Tamura Atsushi、Murota Hiroyuki、Tsukita Sachiko
    • Journal Title

      Annals of the New York Academy of Sciences

      Volume: 1523 Issue: 1 Pages: 51

    • DOI

      10.1111/nyas.14980

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The tight junction protein occludin modulates blood brain barrier integrity and neurological function after ischemic stroke in mice2023

    • Author(s)
      Sugiyama Shintaro、Sasaki Tsutomu、Tanaka Hiroo、Yan Haomin、Ikegami Takeshi、Kanki Hideaki、Nishiyama Kumiko、Beck Goichi、Gon Yasufumi、Okazaki Shuhei、Todo Kenichi、Tamura Atsushi、Tsukita Sachiko、Mochizuki Hideki
    • Journal Title

      Scientific Reports

      Volume: 13 Issue: 1 Pages: 2892-2892

    • DOI

      10.1038/s41598-023-29894-1

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Phase separation of an actin nucleator by junctional microtubules regulates epithelial function2023

    • Author(s)
      Tsukita Kazuto、Kitamata Manabu、Kashihara Hiroka、Yano Tomoki、Fujiwara Ikuko、Day Timothy F.、Katsuno Tatsuya、Kim Jaewon、Takenaga Fumiko、Tanaka Hiroo、Park Sungsu、Miyata Makoto、Watanabe Hitomi、Kondoh Gen、Takahashi Ryosuke、Tamura Atsushi、Tsukita Sachiko
    • Journal Title

      Science Advances

      Volume: 9 Issue: 7

    • DOI

      10.1126/sciadv.adf6358

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A microtubule-LUZP1 association around tight junction promotes epithelial cell apical constriction2020

    • Author(s)
      Yano Tomoki、Tsukita Kazuto、Kanoh Hatsuho、Nakayama Shogo、Kashihara Hiroka、Mizuno Tomoaki、Tanaka Hiroo、Matsui Takeshi、Goto Yuhei、Komatsubara Akira、Aoki Kazuhiro、Takahashi Ryosuke、Tamura Atsushi、Tsukita Sachiko
    • Journal Title

      The EMBO Journal

      Volume: 40 Issue: 2

    • DOI

      10.15252/embj.2020104712

    • URL

      https://localhost/en/publications/5b8a970c-0f27-4635-b2eb-3af07674acb9

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 上皮細胞間接着装置タイトジャンクションによる外分泌システムの構築と生体防御2021

    • Author(s)
      田中啓雄、田村淳、月田早智子
    • Organizer
      第92回 日本動物学会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Remarks] 帝京大学 先端総合研究機構 生体バリア細胞生物学研究室

    • URL

      https://www.fbs.osaka-u.ac.jp/labs/tsukita/

    • Related Report
      2022 Research-status Report 2021 Research-status Report

URL: 

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

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