Abstract
Objective
To construct a lentiviral expression vector for RNA interference (RNAi) of human VIM gene; and assess its gene silencing effect in pancreatic cancer cell line Panc-1.
Methods
Three pairs of human VIM gene short hairpin RNA (shRNA) sequences were designed using a software available on-line and one pair came from document. After synthesis and annealing, four double-stranded oligonucleotides (dsOligo) were cloned into the pGCL-GFP/U6 plasmid, which were subsequently confirmed by polymerase chain reaction (PCR) and DNA sequencing analysis. Real-time PCR and Western-blotting were used to screen the effective pGCL-GFP-shRNA plasmid in 293T cells, then the most effective one was packed into the recombinant lentivirus Lv-VIM-shRNA with lentiviral packing materials pHelper 1.0 and pHelper 2.0 in 293T cells. The titer of lentivirus was determined by hole-by-dilution titer assay. The silencing effect of Lv-VIM-shRNA in Panc-1 cells were validated by real-time PCR and Western-blotting.
Results
An effective Lv-VIM-shRNA was successfully constructed. The titer of lentivirus was determined on 2 × 109 TU/mL. The expressions of VIM mRNA and vimentin were down-regluated in the Panc-1 cells infected with Lv-VIM-shRNA.
Conclusion
An effective Lv-VIM-shRNA could inhibit the expression of VIM gene in Panc-1 cells in vitro, which provides a tool for investigating the role of VIM gene in the signaling pathway involved in tumorigenesis and progression of pancreatic cancer and searching new therapeutic targets.
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Supported by a grant from the National Natural Science Foundation of China (No. 30600592).
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Jiang, J., Shen, M., Qin, R. et al. Construction of a lentiviral vector for RNA interference of human VIM gene and its silencing effect in pancreatic cancer cells. Chin. -Ger. J. Clin. Oncol. 8, 145–149 (2009). https://doi.org/10.1007/s10330-009-0017-7
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DOI: https://doi.org/10.1007/s10330-009-0017-7