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The effects of bioactive molecules on phagocytosis and the elucidation of phagocytic mechanisms in trabecular meshwork cells.

Research Project

Project/Area Number 16K11289
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Ophthalmology
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) 谷原 秀信  熊本大学, 医学部附属病院, 病院長 (60217148)
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) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords貪食能 / 線維柱帯細胞 / Rho / ROCK / 貪食 / 貪食作用
Outline of Final Research Achievements

The purpose of this study is to investigate RhoA signaling effects on phagocytosis of trabecular meshwork (TM) cells. Rho activators, such as lysophosphatidic acid (LPA) and calpeptin, decreased phagocytic activity on TM cells. By contrast, Rho inhibitor suppressed the effects of LPA and calpeptin on phagocytosis. The knockdown of RhoA suppressed the effect of LPA on phagocytosis in TM cells. Moreover, ROCK inhibitor suppressed the effect of LPA on phagocytosis in TM cells. These results suggest that the RhoA signal pathway may regulate the phagocytic function in TM cells.

Academic Significance and Societal Importance of the Research Achievements

線維柱帯細胞は眼圧調節において重要な働きをしていると考えられており、その機能解析は眼圧調節機構の理解に極めて重要な意味を持つ。その線維柱帯細胞が持つ機能の一つとして貪食能がある。これは房水の眼外への排出路となっている線維柱帯組織の恒常性維持に重要な作用である。今回の我々の研究では、線維柱帯細胞の貪食能に対して、Rho-ROCKシグナルの活性化が負の制御を示すことを明らかにした。ROCK阻害剤は既に眼圧下降剤として臨床で使用されている。我々の結果は臨床で使用されている薬剤により線維柱帯の機能改善が期待できる可能性を示していると考えられる。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (8 results)

All 2018 2017 2016 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (5 results) (of which Int'l Joint Research: 2 results) Remarks (1 results)

  • [Journal Article] Inhibition of Rho Kinase Induces Antioxidative Molecules and Suppresses Reactive Oxidative Species in Trabecular Meshwork Cells.2017

    • Author(s)
      Fujimoto T, Inoue T, Ohira S, Awai-Kasaoka N, Kameda T, Inoue-Mochita M, Tanihara H.
    • Journal Title

      Journal of Ophthalmology

      Volume: 2017 Pages: 7598140-7598140

    • DOI

      10.1155/2017/7598140

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Vascular Endothelial Growth Factor-A Increases the Aqueous Humor Outflow Facility.2016

    • Author(s)
      Fujimoto T, Inoue T, Maki K, Inoue-Mochita M, Tanihara H.
    • Journal Title

      PLoS One

      Volume: 11 Issue: 9 Pages: e0161332-e0161332

    • DOI

      10.1371/journal.pone.0161332

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] RhoA activation inhibited phagocytic activity of trabecular meshwork cells2018

    • Author(s)
      Fujimoto T, Inoue T, Ohira S, Inoue M, Tanihara H
    • Organizer
      EGS2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 線維柱帯細胞におけるTGF-β2刺激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2018

    • Author(s)
      藤本智和、井上俊洋、谷原秀信
    • Organizer
      第29回日本緑内障学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 線維柱帯細胞におけるRho/ROCKシグナル活性化因子および阻害剤の貪食能に対する影響2017

    • Author(s)
      藤本智和、井上俊洋、大平さおり、井上みゆき、谷原秀信
    • Organizer
      ConBio2017
    • Related Report
      2017 Research-status Report
  • [Presentation] Steroid-induced alterations in trabecular meshwork2016

    • Author(s)
      藤本智和
    • Organizer
      XXII International Society for Eye Research (ISER) Biennial Meeting
    • Place of Presentation
      京王プラザホテル
    • Year and Date
      2016-09-25
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] In vitroおよびex vivoの研究手法を用いた経シュレム管流出路研究の実践2016

    • Author(s)
      藤本智和
    • Organizer
      第27回日本緑内障学会
    • Place of Presentation
      パシフィコ横浜
    • Year and Date
      2016-09-17
    • Related Report
      2016 Research-status Report
  • [Remarks] 熊本大学大学院生命科学研究部眼科学分野 研究内容

    • URL

      http://www2.kuh.kumamoto-u.ac.jp/ganka/kyousitu/naiyou.html

    • Related Report
      2017 Research-status Report 2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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