Title: Construction and identification of miR-10a-expressing recombinant adenovirus
Abstract: Objective To develop a miR-10a-expressing recombinant adenoviral vector. Methods The EGFP gene in shuttle plasmid pDC316-EGFP-U6 was replaced by red fluorescent protein mCherry gene. Long DNA sequence coding miR-l0a was synthesized. After annealing, the double-stranded miR-10a-coding sequence was inserted into pDC316-mCherry-U6. The resultant pDC316-mCherryU6-miR-10a was co-transfected with adenoviral skeleton plasmid pBHGlox△E1, 3Cre into HEK293 cells. The replication-defective adenovirus Ad-miR-10a was purified, amplified, and tittered by plaque assay. The mCherry expression was detected by fluorescence microscope. The expression of miR-10a by Ad- miR- 10 a in HeLa cells was determined by RT-qPCR. Results The sequence of pDC316-mCherryU6-miR-10 a was confirmed by restriction enzyme digestion and sequencing. mCherry expression could be detected under fluorescence microscope. The titers of Ad-miR-10a was 1.8 × 107 pfu/mL, and the level of miR-10a expression in HeLa cells infected with Ad-miR-10a was 40 times higher than that with Admock. Conclusion A miR-10a-expressing recombinant adenovirs Ad-miR-10a has been successfully constructed. The strategy for artificial expression of siRNA is applicable for expression of miRNA.
Key words:
miRNA; miR-10a; Adenovirus vector; siRNA
Publication Year: 2011
Publication Date: 2011-04-15
Language: en
Type: article
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