Abstract

目的 研究五味子乙素对人乳腺癌MDA-MB-231细胞凋亡的影响及其作用机制。 方法 用细胞计数试剂(CCK-8)检测不同浓度五味子乙素对MDA-MB-231细胞存活率的影响;五味子乙素(10、20、40 μmol/L)作用 MDA-MB-231 细胞 24 h,分别用Annexin V-FITC/PI检测细胞凋亡情况;用DCFA-DA荧光探针检测细胞内活性氧(ROS)水平;用Western blot法检测细胞凋亡及内质网应激相关蛋白(Bcl-2、Bax、CHOP、GPR78、PERK、p-PERK、p-eIF2α、eIF2)的表达。 结果 与空白组比较,随着五味子乙素浓度增大,细胞存活率明显降低,其IC50为19.16 μmol/L;与对照组比较,五味子乙素(10、20、40 μmol/L)均能抑制细胞克隆形成(P<0.05),且呈剂量依赖;五味子乙素(10、20、40 μmol/L)均可诱导细胞凋亡(P 结论 五味子乙素可能通过ROS介导内质网应激诱导MDA-MB-231细胞凋亡。

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