蟾毒灵体外抑制人舌鳞癌Tca8113细胞增殖和促凋亡作用及对Na+/K+-ATP酶的影响

目的 探索蟾毒灵对舌鳞状细胞癌Tca8113细胞增殖、凋亡的影响及可能作用机制.方法 以人舌鳞癌Tca8113细胞为研究对象,MTT法检测10、20、40、80、160 nmol/L浓度蟾毒灵体外抑制Tca8113细胞增殖的活性;检测蟾毒灵干预下肿瘤细胞Na+-K+-ATP酶活性的变化;Western blot发检测Bcl-2、Bax、caspase-3蛋白表达.结果 蟾毒灵有抑制Tca8113细胞的活性,且呈剂量-时间依赖性;在蟾毒灵干预下Tca8113细胞Na+-K+-ATP酶收到抑制;Western blot结果显示凋亡相关Bax、caspase-3蛋白表达上调,Bcl-2蛋白表达下调.结论 蟾毒灵通过抑制细胞膜Na+-K+-ATP酶活性,通过调节Bcl-2凋亡通路的相关蛋白,最终激活caspase-3,诱导人舌鳞癌Tca8113细胞凋亡.

Apoptosis of Tca8113 cell induced by bufalin and the inference to Na+-K+-ATPase

Objective To explore the effects of bufalin on proliferation and apoptosis of tongue squamous cell carcinoma Tca8113 cells and its possible mechanism. Methods Tca8113 cells were treated with 10, 20, 40, 80 and 160 nmol/L Tca8113 cells in vitro. MTT assay was used to detect the inhibitory effect of bufalin on the proliferation of Tca8113 cells;And the activity of Na+-K+-ATPase in tumor cells was detected by the interference of bufalin;The expression of Bcl-2, Bax and caspase-3 protein was detected by Western blot. Results Bufalin inhibited the activity of Tca8113 cells in a dose-and time-dependent manner;Na+-K+-ATPase in Tca8113 cells was inhibited by bufalin;The results of Western blot showed that the expression of Bax and caspase-3 protein was up-regulated and the expression of Bcl-2 protein was down-regulated. Conclusion Bufalin induced the apoptosis of human tongue squamous cell carcinoma Tca8113 cells by inhibiting the activity of Na+-K+-ATPase and regulating the related proteins of Bcl-2 apoptosis pathway, finally activating caspase-3.