苦瓜蛋白对A549肺癌细胞的抑制作用及其对MAPK信号通路的影响

Inhibitory action of momordica on non-small cell lung cancer A_(549) cells and its effects on MAPK signaling pathway

目的:观察苦瓜蛋白对非小细胞肺癌A549细胞的生长抑制及促凋亡作用;探讨苦瓜蛋白对A549细胞p42/44-MAPK及其磷酸化p42/44-MAPK蛋白表达水平的影响及其作用分子机制。方法:以不同浓度梯度的苦瓜蛋白处理A549细胞,分别作用不同时间,CCK-8检测其对细胞生长抑制作用;流式细胞术检测细胞凋亡。提取苦瓜蛋白不同作用时间点的全细胞蛋白,westernblot检测p42/44-MAPK及p-p42/44-MAPK信号分子的变化。结果:苦瓜蛋白对A549细胞生长具有明显抑制作用,可显著地诱导A549细胞凋亡。与阴性对照比较,苦瓜蛋白可以不同程度下调p42/44-MAPK及p-p42/44-MAPK信号分子的表达(P<0.05)。结论:苦瓜蛋白对非小细胞肺癌A549细胞具有明显地抑制作用及抗肿瘤作用,其作用可能通过诱导A549细胞凋亡来实现;苦瓜蛋白可以不同程度地下调p42/44-MAPK和磷酸化p42/44-MAPK的表达;MAPK信号通路可能部分参与了苦瓜蛋白诱导肿瘤细胞凋亡的分子机制,驱使肿瘤细胞发生凋亡。

AIM:To observe the inhibitory action and apoptotic activity of momordin to nonsmall-cell lung cancer A549 cells and explore its effects on the expression of p42/44-MAPK and phosphorylation p-p42/44-MAPK and its mechanisms of action.METHODS:A549 cells were treated with different concentration gradient of momordinand and incubated for different time,then the cytostatic activity and apoptosis to A549 cells were detected by CCK-8 kit and flow cytometry,respectively.The bitter melon protein were extracted for di...