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- W2018404851 abstract "Hepatitis C virus (HCV) is a serious human pathogen and an estimated 170 million people are infected worldwide. Current therapeutic regimens have shown limited efficacy against selected genotypes of the virus. The phenomenon of RNA interference can be used to selectively block homologous genes post-transcriptionally, and has revolutionized approaches to study gene function. In this report, we have demonstrated that small interfering RNAs (siRNAs) targeted against NS5A of HCV genotype 1a specifically inhibit NS5A RNA and protein expression in a human hepatoma (HepG2) cell line. Expression of endogenous α-actin and the ds-RNA activated serine/threonine kinase-PKR were unaltered, demonstrating that the inhibitory effect observed from siRNA was specific to the HCV NS5A protein. We next examined whether siRNA directed against NS5A could inhibit core protein expression, the first gene product synthesized in virus infected cells due to its localization at the 5′ end of the HCV polyprotein. For this purpose, a full-length cDNA clone from HCV (H77, genotype 1a) was used, and results indicated that the introduction of NS5A targeted siRNA resulted in an inhibition of NS5A and core protein expression. Moreover, we observed that this siRNA effectively inhibited NS5A mediated activation of the IL-8 promoter. Taken together, our results demonstrated that siRNA was effective in inhibiting HCV protein expression, and may have therapeutic potential to limit HCV replication in chronically infected patients." @default.
- W2018404851 created "2016-06-24" @default.
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- W2018404851 date "2003-10-01" @default.
- W2018404851 modified "2023-10-16" @default.
- W2018404851 title "Inhibition of hepatitis C virus protein expression by RNA interference" @default.
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- W2018404851 doi "https://doi.org/10.1016/s0168-1702(03)00170-9" @default.
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