七叶皂苷钠抑制人白血病Jurkat细胞增殖的机制研究

目的 研究七叶皂苷钠抑制人白血病Jurkat细胞增殖的作用及其机制。方法 MTT法分析七叶皂苷钠对Jurkat细胞增殖的抑制作用，Hoechst 33258染色、FITC-Annexin V/PI双染、DNA Ladder、流式细胞术检测细胞凋亡和细胞周期，Western blotting法分析凋亡相关蛋白变化。结果 七叶皂苷钠呈质量浓度和时间相关方式抑制Jurkat细胞增殖；经七叶皂苷钠处理后的Jurkat细胞出现凋亡的形态学特征、DNA条带，Annexin V⁺/PI^?细胞（早期凋亡细胞）显著增加；七叶皂苷钠可活化Jurkat细胞中Caspase-8、Caspase-9、Caspase-3，引起PARP的切割，并减少Bcl-2蛋白的表达。结论 七叶皂苷钠能有效地通过诱导细胞凋亡抑制Jurkat细胞增殖。

Mechanism of escin sodium in inhibition of human leukemia Jurkat cells proliferation

Objective To investigate the effects of escin sodium on proliferation of human leukemia Jurkat cells and its possible mechanism. Methods The reduction of cellular viability was determined by MTT assay. Hoechst 33258 staining, DNA fragmentation assay, FITC-Annexin V-FITC/PI staining assay, and cytometric analysis were used to confirm the features of apoptosis and cell cycle. Western blotting assays were performed to explore the apoptotic pathway. Results Escin sodium inhibited the proliferation of Jurkat cells in both dose- and time-dependent manners. The morphological apoptosis, DNA fragmentation pattern, and the percentage of Annexin V⁺/PI^? (early apoptosis) cells were markedly increased in escin sodium-treated Jurkat cells. Escin sodium activated Caspase-8, Caspase-9, and Caspase-3, degraded poly (ADP-ribose) polymerase (PARP), and attenuated Bcl-2 expression. Conclusion Escin sodium could inhibit the proliferation of Jurkat cells via the induction of apoptosis effectively.