RNA干扰survivin联合X线放射对大肠癌SW480细胞的影响

目的探讨RNA干扰技术和X线放射处理对大肠癌细胞survivin基因表达的影响。方法合成靶向人survivin基因的siRNA,转染大肠癌细胞SW480,联合或不联合放射治疗。检测转染前后及放射前后细胞survivinmRNA的表达;细胞抑制率及凋亡率,细胞周期分布,细胞survivin蛋白的表达。结果转染survivinsiRNA后的SW480细胞survivin mRNA及蛋白的表达明显低于对照组;SW480细胞转染survivinsiRNA 48 h后G2/M期细胞达(20.90±2.62)%,survivinsiRNA联合放射处理组细胞生长抑制率达59.8%,FCM显示survivinsiRNA联用放射处理组细胞凋亡率达(35.72±1.07)%。结论靶向survivin的siRNA能有效抑制大肠癌细胞SW480 survivin基因的表达,引起大肠癌细胞SW480 G2/M周期阻滞,抑制大肠癌细胞SW480的生长并能诱导其凋亡,并对大肠癌细胞SW480具有放射增敏作用。

Experimental study on the effects of siRNA targeting survivin combined with radiotherapy on human carcinoma cells SW480

Objective To explore the effects of siRNA targeting survivin combined with radiotherapy on human carcinoma cells SW480.Methods The human colorectal carcinoma cell line SW480 was treated with siRNA targeting survivin.The expression level of survivin in transfected SW480 cells was detected by RT-PCR and immunocytochemistry.The effects of siRNA on cell cycle were analyzed by FCM with PI staining.Radiotherapy was combined with siRNAs targeting survivin to study the sensitivity of SW480 induced by siRNA targetin...