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[Construction of pORF-mIG and activity evaluation of MIG in vitro]
Objective:
To establish a transformant of monokine induced by interferon-gamma (MIG) with the eukaryotic expression vector for further investigating the efficacy of its use in antitumor gene therapy.
Methods:
The MIG full-length cDNA was amplified from pBLAST-MIG and was cloned into the eukaryote expression vector pORF-mcs, and the resulted recombinant plasmid was named pORF-MIG. The recombinant pORF-MIG was determined with restriction enzyme and sequencing, and then it was transfected into COS-7 cells by Lipfectamin. Expression of the transformant was detected by immunoblot assay, and the bioactivity was assessed by chemotaxis assay.
Results:
The restriction analysis and the sequence determination confirmed that the recombinant pORF-MIG contained the MIG full-length cDNA. And the transformants of pORF-MIG expressed the MIG protein which could apparently attract the activated lymphocytes.
Conclusion:
The recombinant pORF-MIG was constructed successfully, and this recombinant eukaryotic expression vector could be used in additional studies on the biological effect of MIG and its use in anti-tumor gene therapy.
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