PMID- 15650784 OWN - NLM STAT- MEDLINE DCOM- 20060808 LR - 20061115 IS - 1003-9279 (Print) IS - 1003-9279 (Linking) VI - 18 IP - 4 DP - 2004 Dec TI - [Inhibition of hepatitis C virus gene expression by antisense nucleotide in vitro]. PG - 341-3 AB - OBJECTIVE: To study the mechanism of hepatitis C virus (HCV) gene regulation and the inhibitory effect of antisense RNA on HCV gene expression in vitro. METHODS: The hepatoblastoma cell line (HepG2) was co-transfected by recombinant plasmid of antisense RNA complementary to HCV 5' untranslated region (5'UTR)and HCV 5' UTR Directed luciferase (luc) gene expression recombinant plasmid. Meanwhile a reversed HCV 5'UTR recombinant plasmid which can not transcribe as antisense RNA in the cell and a recombinant plasmid in which the luc was regulated by simian virus 40 (sv40) 5'UTR were used as controls respectively. The level of luc gene expression was determined by an enzymatic assay. RESULTS: The antisense RNA which directed to HCV 5'UTRcould obviously knock down the level of luc gene expression and the close-dependent inhibition of antisense RNA was observed at the same time. However the above inhibition was not shown in the cells co-transfected by reversed HCV 5'UTR recombinant plasmid and HCV 5'UTR directed luc gene expression recombinant plasmid. No reduction was observed in luc gene expression level in the cell co-transfected by both antisense RNA recombinant plasmid and SV40 5'UTR directed luc gene expression recombinant plasmid. CONCLUSION: HCV 5'UTR plays an important role in regulation of viral gene expression. The antisense RNA complementary to HCV 5'UTR could effectively inhibit the gene expression regulated by HCV 5'UTR in vitro. FAU - Li, Yong-nian AU - Li YN AD - Department of Infectious Diseases, The 323 Hospital of PLA, Xi'an 710054, China. yongnian@pub.xaonline.com FAU - Yu, Min AU - Yu M FAU - Wu, Wei-qiang AU - Wu WQ FAU - Gao, Jian-xing AU - Gao JX FAU - Wang, Hong AU - Wang H FAU - Ji, Shao-ping AU - Ji SP FAU - Wang, Qin-huan AU - Wang QH FAU - Si, Chong-wen AU - Si CW LA - chi PT - English Abstract PT - Journal Article PL - China TA - Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi JT - Zhonghua shi yan he lin chuang bing du xue za zhi = Zhonghua shiyan he linchuang bingduxue zazhi = Chinese journal of experimental and clinical virology JID - 9602873 RN - 0 (5' Untranslated Regions) RN - 0 (RNA, Antisense) RN - 0 (RNA, Viral) RN - 0 (Recombinant Proteins) RN - EC 1.13.12.- (Luciferases) SB - IM MH - 5' Untranslated Regions/*genetics MH - Cell Line, Tumor MH - Gene Expression Regulation, Viral MH - *Genes, Viral MH - Hepacivirus/*genetics MH - Hepatoblastoma/pathology MH - Humans MH - Liver Neoplasms/pathology MH - Luciferases/*genetics/metabolism MH - Plasmids MH - RNA, Antisense/*pharmacology MH - RNA, Viral/genetics MH - Recombinant Proteins/genetics MH - Transfection EDAT- 2005/01/15 09:00 MHDA- 2006/08/09 09:00 CRDT- 2005/01/15 09:00 PHST- 2005/01/15 09:00 [pubmed] PHST- 2006/08/09 09:00 [medline] PHST- 2005/01/15 09:00 [entrez] PST - ppublish SO - Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi. 2004 Dec;18(4):341-3.