青蒿琥酯对人肺腺癌A549细胞中caspase-9及caspase-3活性的影响

 目的 研究青蒿琥酯（artesunate,Art）体外诱导人肺腺癌A549细胞凋亡及对半胱天冬氨酸蛋白酶9（cysteine containing aspartate9,caspase-9）和caspase-3活性的影响。方法 Art处理A549细胞,流式细胞计数（Flow Cytometry,FCM）检测细胞周期和细胞凋亡,比色法检测caspase-9活性,westernblot检测caspase-3变化。结果 FCM显示A549细胞经100mg/L Art作用24h,出现S期细胞减少（P〈0.01）,G2/M期细胞数目增多（P〈0.01）,细胞凋亡率增加（P〈0.0）。不同浓度（10mg/L、25mg/L、50mg/L、100mg/L）的Art作用A549细胞24h,caspase-9活性呈浓度依赖性增加,分别为对照组的9.87倍、23.33倍（P〈0.01）、38.47倍（P〈0.01）和60.47倍（P〈0.01）。Western blot显示A549细胞经100mg/L Art作用6、12、24h后,细胞浆中caspase-3活化,分别为对照组1.2倍、1.6倍（P〈0.01）、1.8倍（P〈0.01）。结论 青蒿琥酯可通过增加caspase-9和caspase-3的活性,诱导A549细胞凋亡,为阐明Art的抗癌机理,指导青蒿琥酯用于肿瘤治疗提供实验依据。

Apoptosis Induced by Artesunate in Human Adenocarcinoma Cell Line A549 Cells Associated with Activation of caspase-9 and caspase-3

Objective To investigate the effects of artesunate on apoptosis of human adenocarcinoma cell line A549 cells and activation of cysteine containing aspartate 9(caspase-9) and cysteine containing aspartate 3(caspase-3). Methods A549 cells were treated with artesunate, cell cycle phase’s distribution and apoptosis were detected by flow cytometry. Activation of caspase-9 was identified by colorimetric assay. Change of caspase-3 was detected by western blot. Results With artesunate treatment, marked cell accumul...