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Objective: to regulate gene expression for the application of RNAi technology, build rat interleukin 6 gene (interleukin - 6, IL - 6) eukaryotic expression plasmid. Methods: total RNA extracted from rats colon, by rt-pcr (reverse transcription) get cDNA gene, gene fragments amplified by PCR from purpose, connect it into pcDNA3.1 / CT - GFP - TOPO carrier, the identification of recombinant, transfection COS 7 cells. Results: the successful build the purpose gene recombinant, sequencing of nucleotide sequence is correct, according to a report in COS 7 cells after transfection visible green fluorescence in fluorescence microscope. Conclusion: rat eukaryotic expression plasmid pcDNA3.1 / CT - GFP - successful build of TOPO/IL - 6, as the application of RNAi technology regulation of il-6 gene expression, provides the experimental basis for the study of IL - 6 provide experiment platform with ulcerative colitis.
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