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Investigation into the Protective Effects of Peroxiredoxin 6 on Corneal Epithelial Damage and Dry Eye

Research Project

Project/Area Number 21K16886
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

SHIBATA Teppei  金沢医科大学, 医学部, 講師 (70746700)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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)
Keywords抗酸化作用 / ドライアイ / 創傷治癒 / 角膜 / Prdx6 / 角膜上皮障害 / 涙液 / 酸化ストレス
Outline of Research at the Start

眼表面は物理的,化学的,生物的刺激要因によるストレスをうける。酸化ストレスは眼疾患の発症,増悪因子であるが,ドライアイ(DED)においても外的、内的要因で生じた酸化ストレスがその発症要因の1つである。DEDや薬物毒性など生じる角膜表面の傷害は、点眼や軟膏などで治癒するが,ときに遷延性角膜上皮障害、欠損に陥ることがある。抗酸化酵素であるPeroxiredoxin (Prdx6)は細胞内で活性酸素種の消去、アポプトーシスの抑制作用がある。Prdx6の角膜創傷治癒効果と角膜・涙液におけるPrdx6の役割を解明し難治性角膜障害やDEDに対するPrdx6の新たな治療薬としての可能性を明らかにする。

Outline of Final Research Achievements

In an experiment investigating the effect of Prdx6 eye drops on corneal wound healing, corneal epithelial defects were induced in rabbits, followed by administration of Prdx6 eye drops and control eye drops. The results showed that Prdx6 eye drops had a more pronounced effect on promoting corneal wound healing compared to the control eye drops. Next, to analyze the protective effect of Prdx6 administration against oxidative stress on corneal epithelial cells, cells subjected to high osmolarity-induced stress were treated with Prdx6. This treatment significantly suppressed the production of oxidative stress and the decrease in cell survival rate. Furthermore, to compare Prdx6 levels in human tear fluid between healthy individuals and dry eye patients, tear fluid was collected using the Schirmer I test and micropipettes. The comparison of Prdx6 RNA levels in these samples revealed no significant differences.

Academic Significance and Societal Importance of the Research Achievements

角膜上皮欠損に対してPrdx6点眼は角膜創傷治癒の促進効果があり、外傷やドライアイによる角膜びらんの治療におけるPrdx6点眼が有用な可能性がある。ヒトの角膜上皮細胞における酸化ストレスに対してPrdx6投与すると酸化ストレスの産生と細胞生存率の減少が有意に抑制されており、Prdx6がドライアイやUV,外傷における角膜上皮での酸化ストレス形成を阻害し、角膜上皮を保護する作用が確認されたため、Prdx6点眼は上記の酸化ストレスが原因の角膜上皮障害に対して効果的な可能性がある。

Report

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

    (3 results)

All 2021

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

  • [Journal Article] Lens-specific conditional knockout of tropomyosin 1 gene in mice causes abnormal fiber differentiation and lens opacity2021

    • Author(s)
      Shibata Teppei、Ikawa Masahito、Sakasai Ryo、Ishigaki Yasuhito、Kiyokawa Etsuko、Iwabuchi Kuniyoshi、Singh Dhirendra P、Sasaki Hiroshi、Kubo Eri
    • Journal Title

      Mechanisms of Ageing and Development

      Volume: 196 Pages: 111492-111492

    • DOI

      10.1016/j.mad.2021.111492

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 角膜上皮創傷治癒に及ぼすPrdx6点眼の有効性2021

    • Author(s)
      柴田哲平
    • Organizer
      第125回日本眼科学会総会
    • Related Report
      2021 Research-status Report
  • [Presentation] 低加入度数分節型眼内レンズの偏心により術後近視化を生じた3症例2021

    • Author(s)
      柴田哲平、萩原健太、中津川宥衣、丸山美貴、柴田奈央子、柴田伸亮、水戸毅、久保江理、佐々木洋
    • Organizer
      第75回日本臨床眼科学会
    • Related Report
      2021 Research-status Report

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

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