Abstract
Objective To establish a human pancreatic cancer cell line stably transfected with siRNA expression vector targeting GLI1 gene and examine the interference efficiency.MethodsThe expression of GLI1 gene in five human pancreatic cancer cell lines was detected by quantitative real-time PCR(qRT-PCR);the one with the highest expression level of GLI1 was selected as the target cell line and was transfected with three recombinant plasmids pGCsi-U6-GLI1 siRNA-1,-2,and-3.The positive clones were screened by G418,and the transfection rate was observed by fluorescence microscope.The expression of GLI1 mRNA and protein was analyzed by qRT-PCR and Western blotting analysis,respectively.ResultsPanc-1 cell line was found to have the highest GLI1 expression and was selected as the target cell line for transfection.Plasmids pGCsi-U6-GLI1 siRNA-1,-2,and-3 were successfully transfected into Panc-1 cells separately.After 4 weeks of G418 screening,three stably transfected cell lines named Panc-1/ GLI1 siRNA-1,-2,and-3 were obtained,with the transfection rates all higher than 80%.qRT-PCR and Western blotting analysis showed that the expression levels of GLI1 in Panc-1/ GLI1 siRNA-1,-2,and-3 cells were all significantly lower than those in Panc-1/siControl cells and the blank control cells(P 0.05),with the lowest expression found in Panc-1/ GLI1 siRNA-1 cells.ConclusionWe have successfully constructed a cell line Panc-1/ GLI1 siRNA-1 with GLI1 gene stably silenced,which paving a way for future research.
Published Version
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