目的研究DNA聚合酶ι(DNA polymerase iota,polι)基因对人类结肠癌化疗药物奥沙利铂敏感性的影响。方法采用RNAi技术使SW480细胞中polι基因的表达降低,通过Real time PCR实验检测基因polι低表达水平;运用MTT实验确定SW480细胞对药物...目的研究DNA聚合酶ι(DNA polymerase iota,polι)基因对人类结肠癌化疗药物奥沙利铂敏感性的影响。方法采用RNAi技术使SW480细胞中polι基因的表达降低,通过Real time PCR实验检测基因polι低表达水平;运用MTT实验确定SW480细胞对药物奥沙利铂的敏感性确定给药剂量,并设立实验分组(空白组、对照组、实验组、空白加药组、对照加药组和实验加药组);分别使用流式细胞术和CCK-8实验分别检测不同组细胞的凋亡与增殖情况,通过集落形成实验检测细胞的存活数。结果RNA干扰技术成功降低了SW480细胞中polι基因的表达量(P<0.05),低表达polι基因并同时给予奥沙利铂药物的SW480细胞与只加药的对照组和空白组细胞相比,细胞凋亡实验显示细胞的凋亡率升高(P<0.01),CCK-8实验显示细胞的增殖率降低(P<0.05),集落形成实验显示细胞的存活分数降低(P<0.05)。结论下调SW480 polι基因表达水平,可提高人类结肠癌细胞对药物奥沙利铂的敏感性,并且可以抑制结肠癌细胞的增殖,促进其凋亡。展开更多
Objective: To construct retroviral vector with HBV Pol gene and study its expression in vitro. Methods:The recombinant plasmid HBV2/pBR322 containing 2 copies of HBV full-length gene was provided as the amplification ...Objective: To construct retroviral vector with HBV Pol gene and study its expression in vitro. Methods:The recombinant plasmid HBV2/pBR322 containing 2 copies of HBV full-length gene was provided as the amplification template. The PCR product was cloned into pMD 18-T and subcloned into pMSCVneo and pLNCX2 to construct the recombinant retroviral vectors with HBV Pol gene named by HBV P/pMSCVneo and HBV P/pLNCX2. HBV Pol gene was detected by RTPCR after transfecting the recombinant plasmids into SMMC7721 cells with liposome and G418 selection. Results: The retroviral vector with HBV Pol gene was successfully constructed and the expression of HBV Pol gene in vitro was detected by RTPCR. Conclusion: The retroviral vector with HBV Pol gene can be obtained, which will provide a new insight on the function of HBV Pol gene.展开更多
基金Supported by National Natural Science Foundation of China (No. 30170856)
文摘Objective: To construct retroviral vector with HBV Pol gene and study its expression in vitro. Methods:The recombinant plasmid HBV2/pBR322 containing 2 copies of HBV full-length gene was provided as the amplification template. The PCR product was cloned into pMD 18-T and subcloned into pMSCVneo and pLNCX2 to construct the recombinant retroviral vectors with HBV Pol gene named by HBV P/pMSCVneo and HBV P/pLNCX2. HBV Pol gene was detected by RTPCR after transfecting the recombinant plasmids into SMMC7721 cells with liposome and G418 selection. Results: The retroviral vector with HBV Pol gene was successfully constructed and the expression of HBV Pol gene in vitro was detected by RTPCR. Conclusion: The retroviral vector with HBV Pol gene can be obtained, which will provide a new insight on the function of HBV Pol gene.