天花粉蛋白诱导宫颈癌HeLa细胞凋亡及APC基因去甲基化  

Effects of Trichosanthin on Inducing Apoptosis of Hela Cells and Methylation of APC Gene in Cervical Cancer

作　　者：陈勇[1,2] 郑蓉[2] 刘永珍[2] 陈冬丽[1,2] 陈双郧[2] 

机构地区：[1]湖北中医学院中医系 [2]郧阳医学院附属太和医院妇科,湖北十堰442000

出　　处：《郧阳医学院学报》2009年第6期549-552,共4页Journal of Yunyang Medical College

基　　金：湖北省教育厅自然科学重点项目(b200724002);湖北省杰出青年人才项目(No.2008ABC042);湖北省自然基金项目(No.2007ABA371);湖北省教育厅中青年人才项目(No.Q20082407)

摘　　要：目的:研究天花粉蛋白(TCS)抗宫颈癌作用机制。方法:MTT还原法检测TCS对宫颈癌HeLa细胞的抑制作用,流式细胞仪检测TCS对HeLa细胞周期及凋亡率的影响,MSP检测TCS作用前后APC基因启动子甲基化状态。结果:TCS对HeLa细胞的生长具有明显的抑制作用,呈剂量依赖性;TCS可以将HeLa细胞阻滞于S期;TCS诱导HeLa细胞发生凋亡,有剂量依赖性;80 mg/LTCS处理HeLa细胞48 h后,APC基因启动子出现去甲基化。结论:TCS对HeLa细胞有明显抑制作用,抑制机理与将HeLa细胞阻滞于S期、诱导细胞凋亡及APC基因启动子出现去甲基化有关,TCS有良好的抗宫颈癌临床应用前景。Objective To investigate the mechanism of trichosanthin（TCS） against cervical carcinoma.Methods The inhibitory effect of TCS on Hela cells proliferation was detected by MTT assay.The cell cycle and apoptosis rate of Hela cells were determined by flow cytometry.The methylation status of APC gene was determined with MSP before and after treatment respectively.Results The growth of Hela cells was significantly inhibited with TCS and the inhibitory effect was dose-dependent;the differentiation of Hela cells was blocked at S-phase of the cell cycle;the apoptosis of Hela cells was induced with TCS in a dose-dependent manner;The demethylation of APC gene promoter was observed after treating with TCS at 80 mg/L for 48 h.Conclusion Trichosanthin could inhibit the proliferation of Hela cells,which may be related with the cell cycle block,apoptosis induction and demethylation of APC gene promoter.TCS may have a wide clinical respect in cervical cancer treatment.

关 键 词：天花粉蛋白 HeLa细胞 细胞凋亡 APC基因 

分 类 号：R737.33[医药卫生—肿瘤]