德氮吡格对人肝癌细胞株增殖抑制的体外研究

目的:观察德氮吡格(TNBG)对人肝癌细胞株SMMC-7721和HepG2增殖的影响,探讨其抗肿瘤作用机制.方法:运用MTT法检测德氮吡格对肿瘤细胞增殖的影响,流式细胞仪观察细胞周期分布情况,Western blot分析cyclinB1和p34cdc2的变化.结果:德氮吡格作用SMMC-7721和HepG2细胞72h后,能抑制细胞增殖,呈剂量依赖性.流式细胞仪检测到两株细胞均有S期和G2/M期细胞增加,并且德氮吡格还能诱导HepG2细胞发生凋亡.Western blot发现CyclinB1表达在药物处理组明显降低,而p34cdc2则无明显改变.结论:德氮吡格能抑制肿瘤细胞增殖,可能通过调控CyclinB1表达将肿瘤细胞阻滞于G2/M期,从而达到抗肿瘤的效应.

Inhibition of proliferation of human hepatocellular carcinoma cell lines by TNBG in vitro

Objective:To investigate the effect of TNBG on proliferation of human hepatocellular carcinoma cell lines SMMC-7721 and HepG2.Methods:MTT assay was used to test the effects of anti-proliferation.The flow cytometric analysis was used to detect the cell cycle distribution.Western blot was adopted for detecting the expression of cyclinB1 and p34 cdc2 .Results:Anti-proliferation effects were observed in SMMC-7721 and HepG2 after intervention of TNBG for 72 hours,and the effects were in concentration-dependent manners.The cells showed S and G2/M arrest in both of cell lines,and apoptosis was induced only in HepG2.The expression of cyclinB1 was inhibited,while p34 cdc2 was not changed.Conclusion:TNBG can inhibit the proliferation of tumor cells,which is due to G2/M arrest caused by expression inhibition of cyclinB1 induced by TNBG.