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Role for the Endo180 in collagen gel contraction mediated by corneal fibroblasts

Research Project

Project/Area Number 20K18401
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Takahashi Aya  近畿大学, 奈良病院, 講師 (70460889)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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)
KeywordsEndo180 / コラーゲン / 角膜実質細胞 / 角膜線維芽細胞 / uPA / TGFβ / αSMA / 角膜創傷治癒 / uPAR / TGFbeta / alpha SMA / コラーゲン受容体 / integrin
Outline of Research at the Start

角膜実質細胞はintegrinによりコラーゲン線維と結合し形状変化に深くかかわっていると考えられている。近年新たなコラーゲン受容体としてEndo180の存在が報告されている。Endo180はコラーゲンの細胞内への取り込みに重要な役割を果たすコラーゲン受容体である。本研究では角膜創傷治癒過程において, Endo180によるコラーゲン収縮がどのように作用しているかをintegrin系と比較検討し,角膜実質細胞によるコラーゲン収縮へのEndo180の作用を明らかにする。コラーゲンゲル内でマウス角膜実質細胞を培養し、抗Endo180抗体やintegrin競合的阻害剤によるゲル収縮能の変化を検討する。

Outline of Final Research Achievements

Endo180 is a receptor for collagen that mediates its cellular internalization and also known as urokinase-type plasminogen activator (uPA) receptor-associated protein (uPARAP). In this study, anti-Endo180 antibody significantly inhibited the gel contraction induced by corneal fibroblasts, suggesting that Endo180 directly participate collagen gel contraction by corneal fibroblasts. We also found that Endo180 is cleaved by uPA and attenuates TGFβ/Smad3 signal by suppressing the interaction between collagen and corneal fibroblasts, and negatively regulates αSMA expression.

Academic Significance and Societal Importance of the Research Achievements

角膜は光の屈折を担う組織であり、視力の維持のためには透明であることが重要である。角膜感染症の後、角膜実質が瘢痕性に治癒すると角膜は混濁し視力低下をきたす。本研究では角膜実質におけるEndo180の発現や役割を明らかにして角膜実質細胞の筋線維芽細胞への形質転換やコラーゲン収縮能に与える影響を検討することで角膜実質の瘢痕形成や組織収縮の抑制を目的とし、将来的には角膜の不可逆的な混濁による視力予後の改善および患者のQOLの改善に役立つことが期待できる。

Report

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

    (2 results)

All 2022 2020

All Journal Article (2 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results)

  • [Journal Article] Urokinase-type plasminogen activator negatively regulates α-smooth muscle actin expression via Endo180 and the uPA receptor in corneal fibroblasts2022

    • Author(s)
      Sugioka Koji、Nishida Teruo、Kodama-Takahashi Aya、Murakami Junko、Mano Fukutaro、Okada Kiyotaka、Fukuda Masahiko、Kusaka Shunji
    • Journal Title

      American Journal of Physiology-Cell Physiology

      Volume: 323 Issue: 1 Pages: C104-C115

    • DOI

      10.1152/ajpcell.00432.2021

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Requirement for the collagen receptor Endo180 in collagen gel contraction mediated by corneal fibroblasts2020

    • Author(s)
      Nishida Koichi、Sugioka Koji、Murakami Junko、Kodama-Takahashi Aya、Nanri Isamu、Mishima Hiroshi、Nishida Teruo、Kusaka Shunji
    • Journal Title

      Experimental Eye Research

      Volume: 191 Pages: 107933-107933

    • DOI

      10.1016/j.exer.2020.107933

    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-11-21  

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