Establishment and identification of B16 cell line stably expressing human survivin gene

Abstract

Objective To construct the eukaryotic expression vector of human survivin gene and stably transfect it into mouse melanoma B16 cell line.Methods The full length human survivin cDNA fragment was amplified by PCR and inserted into eukaryotic expression vector pIRES-neo;the restriction enzyme position and 6 his tag were added to obtain recombinant plasmid pIRES-neo-SUR-(his)6,which was then transfected into B16 cells by Lipofectamine 2000.After screening culture by G418,a stably transfected cell line was established,and the transcription and expression of the human survivin gene were identified by RT-PCR,Western blotting analysis and immunofluorescence assay.Results The result of restriction enzyme digestion and the sequence analysis showed that the recombinant of pIRES-neo-SUR-(his)6was successfully constructed.RT-PCR results showed survivin gene(about 530 bp) was amplified from the total RNA in the group stably transfected with pIRES-neo-SUR-(his)6.Western blotting analysis showed the expression of survivin protein in pIRES-neo-SUR-(his)6 transfection group,but not in the control group.FACS and immunofluorescence assay showed high fluorescence signal in pIRES-neo-SUR-(his)6 transfection group,with the fluorescence positive rate being 91.38% when No.5 monoclonal antibody was used;no fluorescence signal was found in the control group(transfected with pIRES-neo).Conclusion We have successfully constructed the eukaryotic expression vector of human survivin pIRES-neo-SUR-(his)6,and established a B16 cell line stably and highly expressing human survivin gene.