【摘要】 目的研究癌胚抗原(CEA)特异性基因沉默对基因工程腺病毒H101杀伤食管癌EC9706细胞作用的影响,以探讨影响H101敏感性的内在因素。方法利用RNA干扰(RNAi)技术,构建针对人食管癌EC9706细胞的CEAsiRNA载体,通过基因转染,在EC9706细胞中建立稳定的CEA基因沉默体系,并以空载体转染和未进行转染的EC9706细胞作对照,建立人食管癌细胞裸鼠皮下移植瘤模型,H101瘤内注射。用RealTimePCR和免疫组化法检测CEA在移植瘤中的表达,测量肿瘤体积。结果降低CEA在mRNA和蛋白质水平的表达,对人食管癌EC9706细胞裸鼠皮下移植瘤成瘤时间和大小无明显影响,H101瘤内注射后,干扰组肿瘤体积显著小于空载体组和对照组(P<0·05)。结论抑制食管癌EC9706细胞中CEA的表达,能增强H101的敏感性。更多还原

【Abstract】 Objective To study the effect of gene engineering adenovirus H101 for treating esophagus carcinoma EC9706 induced by CEA gene specific silencing and to explore internal influential factor of H101 sensitivity. Methods To construct the siRNA expression vector of CEA and to inhibit the expression of CEA through RNA interference and gene transfection in EC9706 cell,stable CEA gene silencing system was set up,compared with empty vector group and non-transfected EC9706 cell,the model of athymic mouse subcutaneous transplantation tumor of human esophagus carcinoma EC9706 cell was established followed by injection with H101. The mRNA and protein expressions of CEA were detected by real time PCR and immunohistochemistry,the tumor size was measured. Results Silencing CEA gene by applying RNAi can inhibit CEA mRNA and protein expression in nude mice model with transplanted human esophageal cancer cells,there was no evident influence on tumor growth and mass oftumor. After using H101,the tumor size of interfering group was much smaller than that of empty vector group and normal control group(P<0.05).Conclusion Inhibiting CEA expression in esophagus carcinoma EC9706 cell may enhance the sensitivity of H101.更多还原