NF-κB基因RNA干扰载体的构建

目的:构建核因子-κB(nuclear factor kappa B,NF-κB)基因的RNA干扰载体,观察其抑制NF-κB蛋白的效率.方法:分别构建大鼠NF-κB基因的pcDNA3.1/CT-GFP-TOPO-NF-κB重组真核表达载体和pSilencer 1.0-U6-siRNA-NF-κB重组载体,用两种重组载体转染COS-7细胞,在荧光倒置显微镜下观察大鼠NF-κB-绿色荧光融合蛋白的表达,并用Western免疫印迹方法检测.结果:荧光倒置显微镜观察及Western免疫印迹检测结果均显示随着pSilencer 1.0-U6-siRNA-NF-κB重组载体浓度的增加,NF-κB-绿色荧光融合蛋白表达量逐渐减少.结论:成功构建NF-κB基因的RNA干扰载体.

Construction of NF-κB siRNA expression vector

OBJECTIVE: To construct a NF-kappaB siRNA expression vector and to detect the specific silencing effect of the siRNA on the expression of NF-kappaB protein. METHODS: pcDNA3.1/CT-GFP-TOPO recombinant eukaryotic expression vector and pSilencer 1.0-U6-siRNA-NF-kappaB recombinant vector were constructed respectively. These 2 recombination plasmids were co-transfected into COS-7 cells, and the NF-kappaB silence induced by RNAi was detected by Western blot and the inverted fluorescence microscope. RESULTS: The levels of NF-kappaB protein in COS-7 cells could be silenced effectively and specifically by pSilencer 1.0-U6-siRNA- NF-kappa recombinant vector. The expression of NF-kappaB protein was reduced gradually with the increase of pSilencer 1.0-U6-siRNA- NF-kappaB recombinant vector,which could be detected by Western blot under the inverted fluorescence microscope. CONCLUSION: NF-kappaB siRNA expression vector is constructed successfully.