摘要目的 研究HIV-1 Vpr诱导Hela、Lovo、HepG2细胞凋亡和G2期阻滞效果.方法 构建含有HIV-1 Vpr基因的pcDNA4-Vpr重组载体,体外转染Hela、Lovo、HepG2细胞,同时设pcDNA4-EGFP质粒转染对照组、FUGENE组和空白对照组.转染后24、48、72 h,通过甲臜化合物法检测细胞增殖,流式细胞仪检测细胞周期分布,并使用ANNEXIN V/P1双染法检测细胞凋亡.结果 与对照组相比,转染后24、48、72 h,Hela、Lovo、HepG2三种细胞的增殖抑制率、G2期阻滞率及细胞凋亡率均呈上升趋势(P＜0.05).Hela、Lovo、HepG2在转染后72 h的增殖抑制率分别为29.67％、27.35％、31.67％；G2期细胞周期阻滞率分别为24.9％、18.8％、32.1％；凋亡率分别为15.46％、7.7％、41.5％.结论 HIV Vpr体外能诱导Hela、Lovo、HepG2肿瘤细胞的G2期阻滞和细胞凋亡.

abstractsObjective To investigate the G2 cell cycle arrest and apoptosis induced by HIV-1 Vpr gene on Hela,Lovo and HepG2 cancer cells.Methods Recombinant vector pcDNA4-Vpr was constructed by DNA recombination technology and was then transfected into Hela,Lovo and HepG2 cells.Meanwhile,pcDNA4-EGFP plasmid group,FUGENE group and blank group were also set up as control.Ratio of cytostasis was evaluated by MTS assay 24 h,48 h and 72 h later,cell cycle arrest examined by flow cytometry and apoptosis detected by staining with ANNEXIN V and PI double dyes.Results Compared to the control group,the value of inhibition ratio,G2 arrest and apoptosis of Hela,Lovo and HepG2 cells increased obviously 24 h,48 h and 72 h after the transfection ( P ＜ 0.05 ).72 h after the transfection,the inhibition ratio of Hela,Lovo and HepG2 was 29.67％,27.35％ and 31.67％ respectively.Percentage of G2 phase cells was 24.9％,18.8％and 32.1％ respectively.Apoptosis percentage of Hela,Lovo and HepG2 ceils was 15.46％,7.7％ and 41.5％ correspondingly.Conclusion HIV-1 Vpr gene can induce cell cycle G2 arrest and apoptosis of Hela,Lovo and HepG2 cell lines in vitro.