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2022 Fiscal Year Final Research Report

Subretinal drug administration for refractory retinal disease

Research Project

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Project/Area Number 19K09970
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

KIMURA Shuhei  岡山大学, 大学病院, 講師 (90628710)

Co-Investigator(Kenkyū-buntansha) 大内 淑代  岡山大学, 医歯薬学域, 教授 (00253229)
Project Period (FY) 2019-04-01 – 2023-03-31
Keywords加齢黄斑変性 / 糖尿病網膜症 / iPS-RPE細胞 / 抗血管内皮増殖因子
Outline of Final Research Achievements

The effect of anti-VEGF drugs on retinal pigment cells was examined at different concentrations of anti-VEGF drugs, lower concentration bevacizumab and aflibercept (1/16- and 1/64) did not show significant cellular damage compared to the control group.
Tissue plasminogen activator (tPA) was examined in addition to a previous report. The results showed that the higher the concentration of tPA and the longer the exposure time, the lower the transcutaneous electrical resistance. In addition, RPE cells showed necrotic cell death due to tPA-induced retinal toxicity.

Free Research Field

眼科学

Academic Significance and Societal Importance of the Research Achievements

少量の投与量となる抗VEGF薬 (ベバシズマブ、アフリベルセプト、それぞれ1/16および1/64倍希釈) であれば、対照群と比較して有意な細胞障害を認めなかった。低濃度であれば抗VEGF薬の網膜下投与への可能性が示唆され、今後さらなる追加検討が望まれる。
組織プラスミノーゲン活性化因子 (tPA) は濃度が濃くなるほど、暴露時間が長くなるほど、網膜色素上皮細胞の接着にも悪影響を及ぼし、ネクローシスによるものと思われる細胞死を引き起こしていた。よって、網膜下に投与するtPAは、できるだけ低濃度であることが望ましい。

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Published: 2024-01-30  

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