血竭素高氯酸盐诱导人宫颈癌HeLa细胞凋亡的机制

目的研究血竭素高氯酸盐诱导HeLa细胞凋亡机制。方法MTT法测定血竭素高氯酸盐对HeLa细胞的细胞毒作用。通过显微镜，荧光染色观察细胞形态学变化，用琼脂糖凝胶电泳检测DNA片断化。用Western印迹法分析药物对蛋白质表达的影响。结果血竭素高氯酸盐明显抑制HeLa等细胞的增殖，诱导HeLa细胞调亡。Caspase-1，-3，-8，-9及家族抑制剂可明显抑制血竭素高氯酸盐诱导的凋亡。Western印迹结果显示血竭素高氯酸盐作用12 h后Bax及Bcl-X_L的表达明显改变，caspase-3，-8前体及caspase-3底物ICAD和PARP发生降解。结论血竭素高氯酸盐(60 μmol·L^-1)通过改变Bax/Bcl-X_L的表达激活caspase途径诱导HeLa细胞凋亡。

Mechanism of dracorhodin perchlorate-induced Hela cell apoptosis

Aim To study the mechanism of dracorhodin perchlorate-induced Hela cell apoptosis. Methods Cell viability was measured by MTT method. Morphological changes were observed by phase contrast microscopy and Hoechst 33258 staining. DNA fragmentation was assayed by agarose gel electrophoresis. Protein expression was detected by Western blot analysis. Results Dracorhodin perchlorate induced Hela cell apoptosis. The apoptosis was partially reversed by caspase-1,-3,-8,-9 and caspase family inhibitors. Treatment of Hela cells with dracorhodin perchlorate for 12 h increased the protein expression ratio of Bax/Bcl-X L; procaspase-3,-8,ICAD and PARP were cleaved to smaller molecules. Conclusion Dracorhodin perchlorate induced Hela cell death via alteration of Bax/Bcl-X L ratio and activation of caspases.