罗汉果提取物诱导肺癌细胞 A549凋亡的研究

摘要

目的：探讨罗汉果醇诱导肺癌细胞凋亡的作用及可能的分子机制。方法通过分离、纯化得到罗汉果醇单体，以肺癌细胞 A549为对象，采用 MTT 法检测罗汉果醇对肺癌细胞的抑制作用；利用荧光染色、流式细胞仪检测细胞凋亡、细胞周期；以蛋白印迹法检测罗汉果醇对 p21、Bcl-2蛋白表达的影响。结果罗汉果醇能抑制肺癌细胞的增殖，具有促进细胞凋亡、阻滞细胞周期的作用；蛋白印迹检测表明，罗汉果醇可以促进 p21表达升高，Bcl-2表达下降。结论罗汉果醇通过调节 p21、Bcl-2的表达来诱导细胞凋亡和周期阻滞，从而促进肺癌细胞 A549的凋亡。%Aim To study the apoptosis effect of Sir-aitia grosvenorii extract on human lung cancer cells A549 and its mechanisms.Methods MTT assay was applied to determine A549 cell proliferation.Hoechst 33258 staining was applied to investigate morphological changes in A549 cells.To find out the cause of cell growth inhibition,several experiments on cell cycle distribution and apoptosis were performed by flow cy-tometry analysis.The expression of p21 and Bcl-2 was determined by Western blot.Results Flow cytometry analysis showed that treatment with mogrol arrested A549 cells in the G0 /G1 phase and induced apoptosis. After treatment with Siraitia grosvenorii extract,West-ern blot experiment showed cell cycle regulator p21 was up-regulaed,while the apoptosis inhibitor Bcl-2 was down-regulated.Conclusion Treatment with Siraitia grosvenorii extract arrests the A549 cells at G0 /G1 phase and induces apoptosis that may contribute to the anti-proliferation activity of mogrol through the regula-tion of p21 and Bcl-2 expression.