Transfection of the human sodium/iodide symporter (NIS) gene with liposomes and the expression of the NIS protein in human lung A549 cancer cells
Tóm tắt
To examine the possibility of human sodium iodide symporter (hNIS) protein expression in lung cancer cells. Human lung A549 cancer cells were thawed and cultured in vitro. The cells were divided into an experimental group transfected with a recombinant pcDNA3-hNIS plasmid and a control group transfected only with a pcDNA3 plasmid. The recombinant plasmid vector encoding the hNIS gene (pcDNA3-hNIS) was amplified, purified and identified. The hNIS gene was followed by DNA sequencing. A Western blot and an immunohistochemical assay were applied to detect the hNIS protein expression in the transfected human lung A549 cancer cells. Restriction enzyme digestion and DNA sequencing results showed the size and direction of the inserted gene in the recombinant pcDNA3-hNIS plasmid was correct. The Western blot method and immunohistochemical analysis showed a positive NIS protein expression in the experimental group. The NIS protein was detected mainly in the cell membranes showing a positive rate up to 70.6% with no expression of the NIS protein in the control group. There was a significant difference between two groups (P=0.000). The hNIS gene was transfected effectively into human lung A549 cancer cells mediated by Lipofectamine 2000, and was expressed with its protein in vitro.
Tài liệu tham khảo
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