首页|期刊导航|中华医学杂志（英文版）|Specific anti-viral effects of RNA interference on replication and expression of hepatitis B virus in mice
中华医学杂志（英文版）2005，Vol.118Issue(16)：1351-1356,6.
Specific anti-viral effects of RNA interference on replication and expression of hepatitis B virus in mice
Specific anti-viral effects of RNA interference on replication and expression of hepatitis B virus in mice
摘要
Abstract
Background RNA interference (RNAi) is a powerful tool to silence gene expression post-transcriptionally. Our previous study has demonstrated that small interfering RNAs (siRNAs) have sufficiently inhibited hepatitis B virus (HBV) replication and expression in vitro. In this study we observed the RNAi-mediated inhibitory effects on HBV replication in mice models and accessed the specificity of these effects.Methods A mutant RNAi vector (pSI-C mut) with two base pairs different from the original target gene sequence at the RNAi vector (pSI-C) was constructed according to the method described in this study. A mouse model of acute hepatitis B virus infection was established by injecting naked plasmid pHBV1.3 via the tail vein with acute circulatory overload. pSI-C, pSI-C mut and the irrelevant RNAi control plasmid for green fluorescent protein (GFP) gene, pSIGFP were respectively delivered with pHBV1.3 by tail vein injection method. Six days post injection, enzyme-linked immunosorbent assay (ELISA) assay was used to measure the concentration of HBV surface antigen (HBsAg) in mouse serum, immunohistochemical straining method was used to visualize the expressin of HBV core protein (HBcAg) in liver tissues, and the transcriptional level of HBV C mRNA in liver tissues was detectedd by reverse transcriptase PCR (RT-PCR) analysis.Results Injection of pSI-C exerted magnificent and specific inhibitory effects on the replication and expression of HBV in the murine model. After 6-day post-injection (p.i.), the OD values were shown to be 5.07±1.07 in infecting group and 0.62±0.59 in pSI-C group. The concentration of HBsAg in pSI-C group was significantly lower than that in infecting group (P<0.01). Liver intracellular synthesis of viral core protein was sharply reduced to 0.9%±0.1%, compared with 5.4%±1.2% of positive hepatocytes in infecting group (P<0.01), and the transcriptional level of HBV C mRNA was greatly reduced by 84.7%. However, the irrelevant RNAi control plasmid (pSIGFP), and the pSI-C mut did not show the same robust inhibitory effects as pSI-C. Conclusion pSI-C exert efficient and specific inhibitory effects on HBV replication and expression in mice models.关键词
RNA interference/hepatitis B virus/gene therapyKey words
RNA interference/hepatitis B virus/gene therapy分类
医药卫生引用本文复制引用
WU Ying,HUANG Ai-long,TANG Ni,ZHANG Bing-qiang,LU Nian-fang..Specific anti-viral effects of RNA interference on replication and expression of hepatitis B virus in mice[J].中华医学杂志（英文版）,2005,118(16):1351-1356,6.基金项目
This work was supported by a grant from the National Natural Science Foundation of China (No.30300298). （No.30300298）
