Objective:To construct and identify a vector expressing TRAM siRNA in mammalian cells.Methods:It was constructed that the vector named R-pSUPER-EGFP used to transcribe functional TRAM siRNA. Two of pair 64 nt TRAM gen...Objective:To construct and identify a vector expressing TRAM siRNA in mammalian cells.Methods:It was constructed that the vector named R-pSUPER-EGFP used to transcribe functional TRAM siRNA. Two of pair 64 nt TRAM gene specific target sequences were inserted into the downstream of the H1 promoter. The recombinants were transformed into E. coli JM109, and finally their veracity was confirmed by double cutting with the enzymes and sequencing. R-pSUPER-EGFP was transfected into RAW264.7 cell by using Lipofectamine TM2000, and the expression of TRAM was detected by Western blotting. Results:Two different recombinant plasmids containing corresponding TRAM gene specific target sequences were constructed, transfected into RAW264.7 cell line successively, which can specifically restrain expression of TRAM protein. Conclusion:The optimizing method in constructing the recombinant vector serves other plasmid-based RNA interference research. Therefore, the recombinant vectors establish the basis for research on the function of TRAM gene.展开更多
Objective:To construct SET gene recombinant adenovirus vector and SET gene small interfering RNA(SiRNA) recombinant adenovirus vector for over-expression or knock-down of SET levels. Methods:The cDNA sequence of SET w...Objective:To construct SET gene recombinant adenovirus vector and SET gene small interfering RNA(SiRNA) recombinant adenovirus vector for over-expression or knock-down of SET levels. Methods:The cDNA sequence of SET was cloned by reverse transcriptive polymerase chain reaction(RT-PCR) and the SET gene fragment was subcloned into adenovirus shuttle plasmid pAdTrack-CMV to construct the shuttle plasmid pAdTrack-SET.The shuttle plasmid pAdtrack-SET was transformed into BJ5183 cells with the adenoviral backbone pAdEasy-1 to obtain the homologous recombinant Ad-CMV-SET and the recombinant Ad-CMV-SET was packaged and amplified in the AD293 cells.The expression of SET in AD293 cells was detected by Western blot.In addition,we constructed SET gene SiRNA recombinant adenovirus vector(Ad-H1-SiRNA/SET) and its efficacy of knockdown of SET protein was detected in infected GC-2spd(ts) cells by Western blot. Results:The recombinant adenovirus vectors,both SET gene recombinant adenovirus vector Ad-CMV-SET and SET gene SiRNA recombinant adenovirus vector Ad-H1-SiRNA/SET,were proven to be constructed successfully by the evidence of endonulease digestion and sequencing.AD293 cells infected with either recombinant adenovirus vector of Ad-CMV-SET or Ad-H1-SiRNA/SET were observed to express GFP.The expression of SET protein was up-regulated significantly in AD293 cells infected with SET gene recombinant adenovirus vector.On the contrast, SET protein was significantly down-regulated in the GC-2spd(ts) cells infected with Ad-H1-SiRNA/SET (P<0.05) and the knockdown efficiency was approximately 50%-70%. Conclusion:The recombinant adenovirus vector Ad-CMV-SET and Ad-H1-SiRNA/SET were successfully constructed and effectively expressed in germ cells and somatic cells.It provides an experimental tool for further study of SET gene in the physiological and pathophysiological mechanism of reproduction-related diseases.展开更多
目的构建HO1基因的真核干扰表达载体,评估其转染人胃癌细胞系SGC-7901细胞后对HO1基因的干扰效果及其功能。方法将外源性重组真核干扰表达载体HO1基因(pS/HO1)转染到人胃癌细胞系SGC-7901内,经G418筛选并建立siRNA表达载体稳定沉默胃癌S...目的构建HO1基因的真核干扰表达载体,评估其转染人胃癌细胞系SGC-7901细胞后对HO1基因的干扰效果及其功能。方法将外源性重组真核干扰表达载体HO1基因(pS/HO1)转染到人胃癌细胞系SGC-7901内,经G418筛选并建立siRNA表达载体稳定沉默胃癌SGC-7901细胞HO1基因的细胞系,分为SGC-7901-pS/HO1组,转染空质粒细胞(SGC-7901-pS)组和未处理细胞(SGC-7901)组;用实时荧光定量PCR和蛋白印迹验证HO1基因在各组细胞中的表达,并通过CCK-8和克隆形成实验分别观察HO1基因被干扰后细胞的生物学行为。结果与SGC-7901-pS组相比,SGC-7901-pS/HO1细胞中HO1基因蛋白表达明显减少,降低了5.58倍(0.321±0.051 vs 1.675±0.153,P<0.05);与对照组相比较,SGC-7901-pS/HO1实验组较SGC-7901-pS对照组细胞增殖数量明显减少(P<0.001);与转染pS空载体的SGC-7901-pS细胞对照组相比,SGC-7901-pS/HO1细胞的克隆形成明显减少,降低了3.45倍(8.32±1.142 vs 2.32±0.362,P<0.05)。结论 HO1基因真核siRNA表达载体筛选成功,为继续深入的研究HO1基因在胃癌中的功能提供了依据。展开更多
文摘Objective:To construct and identify a vector expressing TRAM siRNA in mammalian cells.Methods:It was constructed that the vector named R-pSUPER-EGFP used to transcribe functional TRAM siRNA. Two of pair 64 nt TRAM gene specific target sequences were inserted into the downstream of the H1 promoter. The recombinants were transformed into E. coli JM109, and finally their veracity was confirmed by double cutting with the enzymes and sequencing. R-pSUPER-EGFP was transfected into RAW264.7 cell by using Lipofectamine TM2000, and the expression of TRAM was detected by Western blotting. Results:Two different recombinant plasmids containing corresponding TRAM gene specific target sequences were constructed, transfected into RAW264.7 cell line successively, which can specifically restrain expression of TRAM protein. Conclusion:The optimizing method in constructing the recombinant vector serves other plasmid-based RNA interference research. Therefore, the recombinant vectors establish the basis for research on the function of TRAM gene.
基金Projects from China National Department of Science and Technology(81070465)a project from China Jiangsu Province (BM2008151)
文摘Objective:To construct SET gene recombinant adenovirus vector and SET gene small interfering RNA(SiRNA) recombinant adenovirus vector for over-expression or knock-down of SET levels. Methods:The cDNA sequence of SET was cloned by reverse transcriptive polymerase chain reaction(RT-PCR) and the SET gene fragment was subcloned into adenovirus shuttle plasmid pAdTrack-CMV to construct the shuttle plasmid pAdTrack-SET.The shuttle plasmid pAdtrack-SET was transformed into BJ5183 cells with the adenoviral backbone pAdEasy-1 to obtain the homologous recombinant Ad-CMV-SET and the recombinant Ad-CMV-SET was packaged and amplified in the AD293 cells.The expression of SET in AD293 cells was detected by Western blot.In addition,we constructed SET gene SiRNA recombinant adenovirus vector(Ad-H1-SiRNA/SET) and its efficacy of knockdown of SET protein was detected in infected GC-2spd(ts) cells by Western blot. Results:The recombinant adenovirus vectors,both SET gene recombinant adenovirus vector Ad-CMV-SET and SET gene SiRNA recombinant adenovirus vector Ad-H1-SiRNA/SET,were proven to be constructed successfully by the evidence of endonulease digestion and sequencing.AD293 cells infected with either recombinant adenovirus vector of Ad-CMV-SET or Ad-H1-SiRNA/SET were observed to express GFP.The expression of SET protein was up-regulated significantly in AD293 cells infected with SET gene recombinant adenovirus vector.On the contrast, SET protein was significantly down-regulated in the GC-2spd(ts) cells infected with Ad-H1-SiRNA/SET (P<0.05) and the knockdown efficiency was approximately 50%-70%. Conclusion:The recombinant adenovirus vector Ad-CMV-SET and Ad-H1-SiRNA/SET were successfully constructed and effectively expressed in germ cells and somatic cells.It provides an experimental tool for further study of SET gene in the physiological and pathophysiological mechanism of reproduction-related diseases.
文摘目的构建HO1基因的真核干扰表达载体,评估其转染人胃癌细胞系SGC-7901细胞后对HO1基因的干扰效果及其功能。方法将外源性重组真核干扰表达载体HO1基因(pS/HO1)转染到人胃癌细胞系SGC-7901内,经G418筛选并建立siRNA表达载体稳定沉默胃癌SGC-7901细胞HO1基因的细胞系,分为SGC-7901-pS/HO1组,转染空质粒细胞(SGC-7901-pS)组和未处理细胞(SGC-7901)组;用实时荧光定量PCR和蛋白印迹验证HO1基因在各组细胞中的表达,并通过CCK-8和克隆形成实验分别观察HO1基因被干扰后细胞的生物学行为。结果与SGC-7901-pS组相比,SGC-7901-pS/HO1细胞中HO1基因蛋白表达明显减少,降低了5.58倍(0.321±0.051 vs 1.675±0.153,P<0.05);与对照组相比较,SGC-7901-pS/HO1实验组较SGC-7901-pS对照组细胞增殖数量明显减少(P<0.001);与转染pS空载体的SGC-7901-pS细胞对照组相比,SGC-7901-pS/HO1细胞的克隆形成明显减少,降低了3.45倍(8.32±1.142 vs 2.32±0.362,P<0.05)。结论 HO1基因真核siRNA表达载体筛选成功,为继续深入的研究HO1基因在胃癌中的功能提供了依据。
