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Thapsigargin对人晶状体上皮细胞系SRA01/04增殖抑制的作用机制
Authors
吴明星
姬红培
彭瑞萍
Publication date
1 January 2007
Publisher
Editorial Office of Journal of Sun Yat-sen University
Abstract
【目的】研究thapsigargin(TG)对体外培养的人品状体上皮细胞系SRA01/04增殖的影响,并探讨其分子机制。【方法】不同浓度TG处理SRA01/04细胞72h,噻唑蓝比色法(MTT)检测细胞增殖;流式细胞仪(PI法)检测细胞周期改变;透射电镜观察细胞超微结构变化;TUNEL法检测细胞核中DNA的断裂情况;激光共焦显微镜和流式细胞仪检测Caspase3活性亚单位(17/19ku)的表达及阳性细胞表达率。【结果】MTT法测得TG为0.325~5μmol/L时,细胞增殖抑制率变化显著,IC50大约为0.8μmol/L;透射电镜显示TG处理SRA01/04细胞膜皱缩,染色体浓缩、边集、核膜裂解、凋亡小体形成;流式细胞仪(PI法)及TUNEL法检测TG浓度为0,0.1,0.5,1,10μmol/L分别处理SRA01/04细胞72h,细胞凋亡率随浓度的增加而增加,呈浓度依赖性;TG处理后细胞Caspase3阳性表达率也呈浓度依赖性增加,TG为10μmol/L时,几乎每个细胞浆内Caspase3都被激活。【结论】Thapsigargin可能通过激活Caspase3为诱导体外培养的人晶状体上皮细胞系SRA01/04细胞凋亡而抑制其增殖,TG为预防后发性白内障的药物研究提供了基础
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Last time updated on 15/10/2024