[1]周圆,尹悦,冯俊侨,等.氧化损伤对视网膜色素上皮细胞三联组氨酸核苷结合蛋白1(HINT1)表达的影响[J].眼科新进展,2019,39(1):017-21.[doi:10.13389/j.cnki.rao.2019.0004]
 ZHOU Yuan,YIN Yue,FENG Jun-Qiao,et al.The effect of oxidative stress on the expression of histidine triad nucleotide-binding protein 1 in retinal pigment epithelial cells[J].Recent Advances in Ophthalmology,2019,39(1):017-21.[doi:10.13389/j.cnki.rao.2019.0004]
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氧化损伤对视网膜色素上皮细胞三联组氨酸核苷结合蛋白1(HINT1)表达的影响/HTML
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《眼科新进展》[ISSN:1003-5141/CN:41-1105/R]

卷:
39卷
期数:
2019年1期
页码:
017-21
栏目:
实验研究
出版日期:
2019-01-05

文章信息/Info

Title:
The effect of oxidative stress on the expression of histidine triad nucleotide-binding protein 1 in retinal pigment epithelial cells
作者:
周圆尹悦冯俊侨杨敏蔡嘉慧吴昌睿马乐张玮
710061 陕西省西安市,西安交通大学第一附属医院(周圆,吴昌睿,张玮);710061 陕西省西安市,西安交通大学医学部公共卫生学院(周圆,尹悦,冯俊侨,杨敏,蔡嘉慧,马乐)
Author(s):
ZHOU YuanYIN YueFENG Jun-QiaoYANG MinCAI Jia-HuiWU Chang-RuiMA LeZHANG Wei
First Affiliated Hospital of Xi’an Jiaotong University (ZHOU Yuan,WU Chang-Rui,ZHANG Wei),Xi’an 710061,Shaanxi Province,China;School of Public Health,Xi’an Jiaotong University Health Science Center (ZHOU Yuan,YIN Yue,FENG Jun-Qiao,YANG Min,CAI Jia-Hui,MA Le),Xi’an 710061,Shaanxi Province,China
关键词:
过氧化氢视网膜色素上皮细胞凋亡三联组氨酸核苷结合蛋白1
Keywords:
hydrogen peroxideretinal pigment epitheliumapoptosishistidine triad nucleotide-binding protein 1
分类号:
R774
DOI:
10.13389/j.cnki.rao.2019.0004
文献标志码:
A
摘要:
目的 探讨过氧化氢(hydrogen peroxide,H2O2)诱导人视网膜色素上皮(retinal pigment epithelium,RPE)细胞氧化损伤对三联组氨酸核苷结合蛋白1(histidine triad nucleotide binding protein 1,HINT1)表达的影响。方法 将人ARPE-19细胞系分别用0 μmol·L-1 H2O2(对照组)、50 μmol·L-1 H2O2、100 μmol·L-1 H2O2、200 μmol·L-1 H2O2、400 μmol·L-1 H2O2、600 μmol·L-1 H2O2 6个浓度梯度处理。采用Live/Dead荧光双染法和MTT法分别检测细胞活力和增殖能力;采用Western blot检测RPE细胞内BAX、BCL-2以及HINT1的表达水平。结果 H2O2处理6 h后,对照组及50 μmol·L-1、100 μmol·L-1、200 μmol·L-1、400 μmol·L-1及600 μmol·L-1 H2O2组RPE细胞死亡率分别为(0.35±0.11)%、(2.03±0.87)%、(3.76±1.41)%、(12.17±1.26)%、(17.69±2.24)%、(25.22±0.59)%,RPE细胞死亡率呈剂量依赖性升高(P<0.05)。H2O2作用后对照组及50 μmol·L-1、100 μmol·L-1、200 μmol·L-1、400 μmol·L-1、600 μmol·L-1 H2O2组RPE细胞生存率分别为(40.72±2.71)%、(37.75±0.62)%、(35.30±0.68)%、(34.10±0.74)%、(33.61±0.71)%、(31.05±1.41)%,RPE细胞增殖明显减少(P<0.05),具有剂量-效应关系。随着H2O2浓度的增加,BAX蛋白表达逐渐上升(P<0.01),而抗凋亡BCL-2蛋白表达则逐渐下降(P<0.01),BAX/BCL-2比值相比对照组分别升高1.85倍(50 μmol·L-1 H2O2组)、2.35倍(100 μmol·L-1 H2O2组)、2.86倍(200 μmol·L-1 H2O2组)、3.97倍(400 μmol·L-1 H2O2组)、8.50倍(600 μmol·L-1 H2O2组);HINT1在H2O2处理的RPE细胞中以剂量依赖性方式逐渐下降(P<0.01),分别下降0.78倍(50 μmol·L-1 H2O2组)、0.59倍(100 μmol·L-1 H2O2组)、0.45倍(200 μmol·L-1 H2O2组)、0.42倍(400 μmol·L-1 H2O2组)、0.38倍(600 μmol·L-1 H2O2组)。结论 H2O2氧化损伤诱导RPE细胞活力显著减弱,细胞凋亡相关蛋白BAX表达升高;同时,细胞中HINT1表达下调,表明HINT1可能通过影响细胞凋亡参与年龄相关性黄斑变性的发生,为其药物作用的潜在靶点。
Abstract:
Objective To investigate the effects of hydrogen peroxide (H2O2) on the expression of histidine triad nucleotide-binding protein 1 (HINT1) in oxidative damaged retinal pigment epithelial (RPE) cells in vitro.Methods ARPE-19 cell line was cultured conventionally and treated with six different concentrations of H2O2 including 0 μmol·L-1H2O2 (control group),50 μmol·L-1H2O2,100 μmol·L-1H2O2,200 μmol·L-1H2O2,400 μmol·L-1H2O2,600 μmol·L-1H2O2of treatment groups.Live/Dead fluorescent staining and MTT were utilized to evaluate cell viability and proliferative capacity,respectively.The expression of HINT1,BAX and BCL-2 in RPE cell were examined by western blot.Results The death rates of RPE cells treated with 0 μmol·L-1,50 μmol·L-1,100 μmol·L-1,200 μmol·L-1,400 μmol·L-1 and 600 μmol·L-1 of H2O2 for 6 h were (0.35±0.11)%,(2.03±0.87)%,(3.76±1.41)%,(12.17±1.26)%,(17.69±2.24)%,(25.22±0.59)%,respectively,which significantly increased in a dose-dependent manner (P<0.05).The proliferation rates of RPE cell treated with 0 μmol·L-1,50 μmol·L-1,100 μmol·L-1,200 μmol·L-1,400 μmol·L-1 and 600 μmol·L-1 of H2O2 were (40.72±2.71)%,(37.75±0.62)%,(35.30±0.68)%,(34.10±0.74)%,(33.61±0.71)%,(31.05±1.41)%,respectively presenting with reduced proliferation ability in a dose-dependent manner (P<0.05).With the increase of H2O2 concentration,BAX protein level gradually increased (P<0.01),while anti-apoptotic protein BCL-2 gradually decreased (P<0.01);The relative ratio of BAX/BCL-2 enhanced 1.85-fold(50 μmol·L-1 H2O2),2.35-fold(100 μmol·L-1 H2O2),2.86-fold(200 μmol·L-1 H2O2),3.97-fold(400 μmol·L-1 H2O2),8.50-fold(600 μmol·L-1 H2O2),respectively compared with control group;The level of HINT1 significantly decreased in H2O2 treated RPE cells in a dose dependent manner (P<0.01),with decreased 0.78-fold(50 μmol·L-1 H2O2),0.59-fold(100 μmol·L-1 H2O2),0.45-fold(200 μmol·L-1 H2O2),0.42-fold(400 μmol·L-1 H2O2),0.38-fold(600 μmol·L-1 H2O2),respectively compared with control group.Conclusion Oxidative injured RPE cells induced by different concentrations of H2O2 show decreased cell viabilities and increased level of apoptosis-related proteins.Meanwhile,the expression of HINT1 in RPE cells is down-regulated after treatment of H2O2,indicating HINT1 may play an important role in the pathogenesis of age-related macular degeneration (AMD) by regulating apoptosis.This research provides potential target for AMD therapy and drug development.

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备注/Memo

备注/Memo:
国家自然科学基金资助(编号:81202198、81473059、81602698);陕西省科技新星计划项目(编号:2015LJXX-07);中国博士后科学基金特别资助(编号:2015T81036);西安交通大学青年跟踪项目(编号:qngz2016004);中国博士后科学基金一等资助(编号:2014M560790);陕西省自然科学基金资助(编号:2017JM8041)
更新日期/Last Update: 2019-01-04