人肿瘤坏死因子-α基因转染对舌癌细胞的抑制作用

目的：探讨人肿瘤坏死因子－α（hTNF-α)基因转染对舌癌细胞生长的影响。方法：制备和纯化含hTNF-α基因穿梭质粒，用DOSPER阳离子脂质体介导转染Tca8113舌癌细胞，对照组只给予等量的脂质体，不加入质粒；转染基因，24，48，72，92h后用ELISA法检测细胞培养上清液中hTNF-α的浓度，并用MTT法检测细胞的存活率。结果：基因转染24，48，72，96h后转染组与对照组细胞培养上清液中hTNF-α浓度之间的差异均有显著性（P＜0．05），转染组各个时期浓度均高于对照组；MTT法检测相应各时期转染组与对照组平均OD之间的差异均有显著性（P＜0．05），转染组各个时期平均OD值均低于对照组，转染细胞的存活率降低，生长受抑制。结论：阳离子脂质体介导的hTNF-α基因体外转染可在Tca8113舌癌细胞中高表达并抑制舌癌细胞的生长。

Suppression Effect of Human Tumor Necrosis Factor-α Gene Transfecfion on Tongue Carcinoma Cells

OBJECTIVE: The aim of this study was to investigate suppression effects of the transfection of human tumor necrosis factor-alpha (hTNF-alpha) gene on tongue carcinoma cells. METHODS: The shuttle plasmid containing hTNF-alpha gene was extracted and purified, then it was transferred into Tca8113 tongue carcinoma cells with cationic liposome DOSPER. The control group was only given equivalent liposomes, except the plasmid. After culturing for 24, 48, 72 and 96 hours, the expression of hTNF-alpha gene in Tca8113 cells was analysed by ELISA and, the survival rate of transferred cells was assayed by MTT enzymatic labeling technique. RESULTS: The transferred Tca8113 cells displayed significantly overexpression of hTNF-alpha (P < 0.05). The survival rate of the transferred Tca8113 cells was decreased significantly (P < 0.05). CONCLUSION: Transfection of hTNF-alpha gene in vitro mediated by cationic liposomes can induce the overexpression of hTNF-alpha and inhibit the growth of tongue carcinoma cells.