1.Construction and identification of the human liver-specific miR-122 expression vector.
Chinese Journal of Biotechnology 2009;25(4):587-590
miR-122 is the most abundant miRNA in adult human liver. To study the functions of miR-122 in liver disease, we amplified the precursor of human miR-122 gene by polymerase chain reaction (PCR) from the HepG2 genomic DNA, and then constructed miR-122 expression vector pLMP-miR-122. pLMP-miR-122 could overexpress mature miR-122 when human normal liver cells L-O2 and the hepatoma cells HepG2 were transfected with it. When HepG2 cells were co-transfected with HBV1.3 and pLMP-miR-122, we found that miR-122 could down-regulate the expression of HBs and HBe antigen. These results showed that the human liver specific miR-122 expression vector was constructed successfully, and it could regulate the replication and the expression of HBV genes. The plasmid pLMP-miR-122 will facilitate further studies of the functions of miR-122 in the development of liver virus infection diseases and HCC.
Base Sequence
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Carcinoma, Hepatocellular
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genetics
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pathology
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Cell Line, Tumor
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Genetic Vectors
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genetics
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Humans
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Liver
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metabolism
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Liver Neoplasms
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genetics
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pathology
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MicroRNAs
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analysis
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genetics
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metabolism
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Molecular Sequence Data
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Plasmids
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genetics
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Polymerase Chain Reaction
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methods