Construction and Identification of a Vector Expressing RNA Interference Aimed at the Human CyclinD1 Gene and its Expression in Vitro

摘要

OBJECTIVE To construct a eukaryotic expression vector for RNA interference of the human cyclinD1 gene, and to detect its interference effect in human ovarian cancer cells (HO-8910). rnMETHODS Four target gene segments were synthesized and cloned into the pSUPER vector respectively to construct four recombinant eukaryotic expression vectors, pSUPER-C1-4. The four recombinant vectors were identified by enzyme digestion analysis and DNA sequencing. Then HO-8910 cells were transfected with the pSUPER-C1～4 vectors and subjected to G418 selection. In G418-resistant cells, the interference effect was detected by RT-PCR. rnRESULTS Enzyme digestion analysis and DNA sequencing showed that the target segments were cloned into the pSUPER vector. The four recombinant vectors inhibited transcription of the cyclinDI gene. The pSUPER-C2 vector had a better interference effect. rnCONCLUSION The sequence-specific siRNA effectively interfered with expression of the cyclinD1 gene that was selected. The transcription and expression of the cyclinD1 gene were inhibited effectively by the constructed RNAi eukaryotic expression vectors in the ovarian cancer cells. These results indicate that it is possible to search for a new tumor gene therapy method.