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Elucidation of aqueous humor outflow mechanism by interaction between trabecular meshwork cells and Schlemm's canal endothelial cells

Research Project

Project/Area Number 19K09934
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56060:Ophthalmology-related
Research InstitutionKumamoto University

Principal Investigator

Fujimoto Tomokazu  熊本大学, 大学院生命科学研究部(医), 助教 (50756426)

Co-Investigator(Kenkyū-buntansha) 井上 俊洋  熊本大学, 大学院生命科学研究部(医), 教授 (00317025)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsシュレム管内皮細胞 / 線維柱帯細胞 / 緑内障 / TGF-β2 / HDAC阻害剤 / ROCK阻害剤 / シュレム管内皮 / 線維柱帯 / 房水流出抵抗 / IL-6 / 房水流出路
Outline of Research at the Start

眼圧の調節は房水産生量と房水流出量のバランスにより保たれている。房水の主要な流出路となる、線維柱帯-シュレム管経路を構成するシュレム管内皮細胞の生理的機能についてはいまだ不明な点が多い。本研究では、房水流出路として眼圧の調節に携わるシュレム管内皮細胞を線維柱帯との相互作用の点から解析する。

Outline of Final Research Achievements

The purpose of this study was to elucidate the interaction between trabecular meshwork cells and Schlemm’s canal endothelial cells. We focused on the effect of TGF-β2, whose expression is increased in the aqueous humor of patients with open-angle glaucoma. TGF-β2 reduced the permeability of Schlemm’s canal endothelial cells, and the HDAC inhibitor SAHA suppressed this reduction in permeability. TGF-β2 stimulation increased the expression of α-SMA, fibronectin, and Snail in Schlemm’s canal endothelial cells and trabecular meshwork cells, suggesting the induction of endothelial and epithelial mesenchymal transition. SAHA suppressed the expression of α-SMA and fibronectin by TGF-β2, and significantly suppressed the expression of Snail in Schlemm’s canal endothelial cells. These results were suggested that SAHA suppresses the endothelial-mesenchymal transition of Schlemm’s canal endothelial cells by TGF-β2.

Academic Significance and Societal Importance of the Research Achievements

TGF-β2がシュレム管内皮細胞に対しても直接的に影響を与え、房水流出抵抗に悪影響を与えることが本検討から明らかとなった。また、エピジェネティクス薬が眼圧下降薬として有用である可能性も示された。さらに、シュレム管内皮細胞がTGF-β2により内皮間葉転換を誘導されている可能性も示された。それに対しSAHAやROCK阻害剤のような眼圧下降を示す薬剤が、内皮間葉転換を抑制する結果を示したことから、内皮間葉転換を抑制する薬剤による新たな眼圧調節治療薬の可能性も示すことができた。

Report

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

    (7 results)

All 2022 2021 2020 2019

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (4 results)

  • [Journal Article] Suberoylanilide hydroxamic acid (SAHA) inhibits transforming growth factor-beta 2-induced increases in aqueous humor outflow resistance2021

    • Author(s)
      Fujimoto Tomokazu、Inoue-Mochita Miyuki、Iraha Satoshi、Tanihara Hidenobu、Inoue Toshihiro
    • Journal Title

      Journal of Biological Chemistry

      Volume: 297 Issue: 3 Pages: 101070-101070

    • DOI

      10.1016/j.jbc.2021.101070

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The effects of exosomes derived from trabecular meshwork cells on Schlemm’s canal endothelial cells2021

    • Author(s)
      Takahashi Eri、Saruwatari Junji、Fujimoto Tomokazu、Tanoue Yuki、Fukuda Takaichi、Inoue Toshihiro
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 21942-21942

    • DOI

      10.1038/s41598-021-01450-9

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] RhoA Activation Decreases Phagocytosis of Trabecular Meshwork Cells2021

    • Author(s)
      Fujimoto T., Sato-Ohira S., Tanihara H., Inoue T.
    • Journal Title

      Current Eye Research

      Volume: 46 Issue: 4 Pages: 496-503

    • DOI

      10.1080/02713683.2020.1815791

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] シュレム管内皮細胞におけるTGF-β2誘発EndMT様変化に対するROCK阻害剤の影響2022

    • Author(s)
      藤本智和、井上みゆき、井上俊洋
    • Organizer
      第126回日本眼科学会総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 線維柱帯細胞におけるTGF-β2誘発EMT様変化に対するSAHAの影響2021

    • Author(s)
      藤本智和、伊良波聡、井上みゆき、谷原秀信、井上俊洋
    • Organizer
      第32回日本緑内障学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 線維柱帯細胞・シュレム管内皮細胞の機能と緑内障病態2020

    • Author(s)
      藤本智和
    • Organizer
      第31回日本緑内障学会
    • Related Report
      2020 Research-status Report
  • [Presentation] TGF-β2誘発房水流出抵抗増加に対するヒストン脱アセチル化酵素(HDAC)阻害剤の作用の検討2019

    • Author(s)
      藤本智和、谷原秀信、井上俊洋
    • Organizer
      第30回日本緑内障学会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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