慢病毒载体靶向介导p66shc基因沉默

目的：构建p66shc基因重组慢病毒表达载体，并将之转染至293T细胞，通过RNA干扰致使p66shc基因沉默，为进一步研究p66shc基因功能奠定基础。方法筛选3个RNA靶点，命名为p66shc‐shc1、p66shc‐shc2、p66shc‐shc3，与双酶切后的pLenR‐绿色荧光蛋白（GPH）（含有GFP表达）连接，转化入感受态的DH5α细胞，挑取阳性克隆测序正确后，与pRsv‐REV、pM‐Dlg‐pRRE、pMD2G一起转染293T细胞，于倒置荧光显微镜下检测GFP的表达，证实病毒包装成功。使用荧光定量PCR及Westernblot技术检测p66shc在基因及蛋白水平的表达，选取有效沉默p66shc基因的p66shc‐shc1靶点，为后续试验做准备。结果成功构建表达p66shc的shRNA慢病毒载体并转染至真核生物细胞内，通过荧光定量PCR及Westernblot技术检测其通过RNA干扰导致细胞内p66shc基因沉默。结论靶向表达p66shc的shRNA慢病毒载体，转染入真核生物细胞内可通过RNA干扰在分子及蛋白水平导致p66shc基因沉默。

Study on lentiviral vector target inducing p66 shc gene silencing

Objective To construct p66shc gene interfering lentivirus vectors recombination and transfect it to 293T cells ,RNA interfering was carried out to induce p66shc gene silence ,so as to provide basis for further study of the p66shc function .Methods Screening of three RNA targets which were named after p66shc‐shc1 ,p66shc‐shc2 ,p66shc‐shc3 ,cloned into the pLenR‐GPH vec‐tor ,which contained green fluorescent protein(GFP) and transformed into DH5αcells .The positive clone were picked out for right sequencing and transfected to 293T cells with pRsv‐REV ,pMDlg‐pRRE ,pMD2G .The expression of GFP in inverted fluorescence microscope confirmed the virus packaging success .Fluorescence quantitative PCR and Western blot technology were used to investi‐gate the expression of p66shc at the molecular and protein levels ,p66shc‐shc1 target of effective silencing p66shc gene was selected to prepare for subsequent tests .Results The shRNA lentivirus vector was constructed which could express p66shc and was trans‐fected into 293T cells successfully .Fluorescence quantitative PCR and Western blot technology were used to investigate p66shc gene silence by RNA interference .Conclusion The lentivirus RNAi vector of targeted expression p66shc could induce p66shc gene si‐lence at the molecular and protein levels after transfected into 293T cells by RNA interference .