阿司匹林体外抑制U251细胞增殖及其机制研究

目的研究阿司匹林体外抑制U251胶质瘤细胞的作用及其机制。方法采用MTT法观察药物对人胶质瘤细胞U251的增殖抑制作用;采用流式细胞仪检测U251细胞周期的变化;FITC-AnnexinⅤ/PI双标记检测U251细胞的凋亡;Western blot检测凋亡相关蛋白Bcl-2的表达和Caspase-3的激活。结果阿司匹林可明显抑制人胶质瘤细胞U251的增殖,细胞阻滞在G2/M期;诱导细胞发生凋亡,下调凋亡相关蛋白Bcl-2的表达以及诱导Caspase-3的激活。结论阿司匹林在体外对胶质瘤细胞U251有明显的抑制作用,并可诱导其凋亡。

A Study of the mechanism and inhibitory effect of aspirin on U251 cells in vitro

Aim To study the mechanism and inhibitory effect of aspirin on U251 cells in vitro.Methods The effects of aspirin on proliferation of U251 cells were assessed using the MTT assay.Cell cycle analysis was done by flow cytometry.AnnexinⅤ-FITC Apoptosis Detection Kit was used to detect apoptosis of cells.Western blot was employed to analyze expression of apoptosis-related protein Bcl-2 and Caspase-3.Results The growth inhibiton of U251 cells by aspirin was in a time-and-dose-dependent manner.After treatment with 8 mmol·L-1,cell cycle was arrested at G2/M phase.Aspirin also significantly enhanced apoptosis of U251 cells with down-regulated anti-apoptotic protein Bcl-2,and activation of Caspase-3.Conclusions Aspirin can significantly inhibit the growth of U251 cells through inducing cell apoptosis in vitro.