肼屈嗪对视网膜色素上皮细胞的抗氧化作用及其治疗老年黄斑变性的潜在作用

摘要

目的:探讨在缺氧性损害下肼屈嗪对视网膜色素上皮(ARPE-19)细胞的抗氧化效果以及活性氧(ROS)在此效果中的作用.方法:用人视网膜色素上皮细胞研究肼屈嗪对氧化应激的作用,包括特丁基氢过氧化物(t-BHP)、过氧化氢(H2O2)、叠氮化钠(NaN3),以及缺氧引起的细胞坏死.用MTT检验测试细胞活性.结果:用ROS诱导的氧化应激治疗ARPE-19细胞,肼屈嗪在抵抗t-BHP、H2O2、缺氧引起的细胞坏死中表现出浓度依赖性,但对NaN3不具有浓度依赖性.这一作用中不涉及到一氧化氮(NO).结论:肼屈嗪在ARPE-19细胞中表现出抗氧化应激诱导的破坏,这一作用可能是因为对ROS的净化剂作用.所以肼屈嗪可能用于治疗老年黄斑变性.%AIM: To investigate the antioxidant effect of hydralazine under hypoxia-induced damage on retinal pigment epithelial (ARPE-19) cells and the role of reactive oxygen species (ROS) in this effect.METHODS: Human retinal pigment epithelial (hRPE) cells were used to investigate the effect of hydralazine on oxidative stress, including tert-butyl hydroxyperoxide (t-BHP), H2O2, sodium azide (NaN3), and hypoxia induced cell damage. Cell viability was determined by MTT assay.RESULTS: When ARPE-19 cells were treated with oxidative stress induced by ROS, hydralazine showed concentration-dependent protection against t-BHP, H2O2 and hypoxia induced cell damage but not NaN3. Nitric oxide (NO) was not involved in this effect.CONCLUSION: Hydralazine showed antioxidant potential against oxidative stress induced damage in ARPE-19 cells. These effects might be caused through scavenger of ROS. Thus, hydralazine could be used for the treatment of age-related macular degeneration (AMD).