• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

The establishment of thrapeticstrategy based on corneal stroma melting mechanism in severe cases of neurokeratopaty

Research Project

Project/Area Number 19K09937
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

Okada Yuka  和歌山県立医科大学, 医学部, 教授 (50264891)

Co-Investigator(Kenkyū-buntansha) 雑賀 司珠也  和歌山県立医科大学, 医学部, 教授 (40254544)
住岡 孝吉  和歌山県立医科大学, 医学部, 准教授 (40433362)
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神経麻痺性角膜症 / マウスモデル / マウス / 重症
Outline of Research at the Start

神経麻痺性角膜症は三叉神経第1枝が障害され角膜知覚が低下した症例で角膜上皮障害や角膜創傷治癒遅延が惹起される難治性の疾患である。マウス三叉神経第1枝を18G針(重症モデル)および20G針(軽症モデル)でバイポーラ熱凝固することで重症度を変えた神経麻痺性角膜症モデルの作成に世界で始めて成功した。重症モデルでは三叉神経障害に伴うと考えられる局所の炎症と角膜実質の融解、角膜潰瘍からの穿孔を来たし、眼球が崩壊した。この重症モデルでの実質幹細胞の恒常性破綻(アポトーシス)の病態への関与と神経障害による炎症惹起機序の解明の解析、さらにそれらを標的とした新規の治療戦略の探索のための研究計画を立案した。

Outline of Final Research Achievements

To understand pathobiology of neurotrophic keratopathy we established a severe mouse model of neurotrophic keratopathy by coagulating(18G) the first branch of the trigeminal nerve (V1 nerve).
The corneal opacity and inflammation appeared from an early stage (6 hours later) in the severe model. When observed until 2 years, invasion of inflammatory cells into the corneal stroma was observed for a long period of time, and the corneal stroma was thinner. The corneal epithelium was layered and thickened. This phenomenon may be compensating for the storomal thinning. Since the immunostaining property of keratin 12 (specific keratin of the corneal epithelium) had disappeared, the corneal epithelium was replaced with the conjunctival epithelium instead of the corneal epithelium, and staining of involucrin, which is a marker of keratinization, was observed.

Academic Significance and Societal Importance of the Research Achievements

神経麻痺性角膜症は難治性疾患で、現在対症療法しかない。重症モデルの詳細な組織病理学的検討とその発症メカニズムは重要な課題であるものの、十分な検討が行われていなかったため、重症神経麻痺性角膜症について検討を行う必要がある。
マウスモデルを作成し、病態を解明することで、難治性で、対症療法しか行えなかった神経麻痺性角膜症の病態ターゲットを標的とした治療に繋がると考えている。

Report

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

    (5 results)

All 2021 2020

All Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (2 results)

  • [Journal Article] Roles of Epithelial and Mesenchymal TRP Channels in Mediating Inflammatory Fibrosis2021

    • Author(s)
      Okada Y, Sumioka T, Reinach PS, Miyajima M, Saika S.
    • Journal Title

      Front Immunol.

      Volume: 12 Pages: 731674-731674

    • DOI

      10.3389/fimmu.2021.731674

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Impairment of corneal epithelial wound healing is association with increased neutrophil infiltration and reactive oxygen species activation in tenascin X-deficient mice2021

    • Author(s)
      Sumioka T, Iwanishi H, Okada Y, Miyajima M, Ichikawa K, Reinach PS, Matsumoto KI, Saika S.
    • Journal Title

      Laboratory Investigation

      Volume: Online ahead of print. Issue: 6 Pages: 0-0

    • DOI

      10.1038/s41374-021-00576-8

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Loss of sphingosine 1-phosphate receptor 3 gene function impairs injury-induced stromal angiogenesis in mouse cornea2021

    • Author(s)
      Yasuda S, Sumioka T, Iwanishi H, Okada Y, Miyajima M, Ichikawa K, Reinach PS, Saika S.
    • Journal Title

      Laboratory Investigation

      Volume: 101 Issue: 2 Pages: 245-257

    • DOI

      10.1038/s41374-020-00505-1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 重症マウス神経麻痺性角膜症モデルの長期経過2020

    • Author(s)
      岡田由香 雑賀司珠也
    • Organizer
      日本眼科学会総会
    • Related Report
      2020 Research-status Report
  • [Presentation] 重症マウス神経麻痺性角膜症モデルの長期経過2020

    • Author(s)
      岡田由香、雑賀司珠也
    • Organizer
      日本眼科学会総会
    • Related Report
      2019 Research-status Report

URL: 

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

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi