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Secondary Structural Elements of the HCV X-region Involved in Viral Replication
BACKGROUND AND AIMS: The noncoding regions in the 3′-untranslated region (UTR) of the hepatitis C virus (HCV) genome contain secondary structures that are important for replication. The aim of this study was to identify detailed conformational elements of the X-region involved in HCV replication. ME...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
XIA & HE Publishing Ltd
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4542080/ https://www.ncbi.nlm.nih.gov/pubmed/26356238 http://dx.doi.org/10.14218/JCTH.2015.00003 |
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author | Gupta, Nidhi Wu, Catherine H. Wu, George Y. |
author_facet | Gupta, Nidhi Wu, Catherine H. Wu, George Y. |
author_sort | Gupta, Nidhi |
collection | PubMed |
description | BACKGROUND AND AIMS: The noncoding regions in the 3′-untranslated region (UTR) of the hepatitis C virus (HCV) genome contain secondary structures that are important for replication. The aim of this study was to identify detailed conformational elements of the X-region involved in HCV replication. METHODS: Ribonucleic acid (RNA) structural analogs X94, X12, and X12c were constructed to have identical conformation but 94%, 12%, and 0% sequence identity, respectively, to the X region of HCV genotype 2a. Effects of structural analogs on replication of HCV genotypes 1b and 2a HCV RNA were studied by quantitative reverse transcriptase polymerase chain reaction. RESULTS: In replicon BB7 cells, a constitutive replication model, HCV RNA levels decreased to 55%, 52%, 53%, and 54% after transfection with expression plasmids generating RNA structural analogs 5B-46, X-94, X-12, and X-12c, respectively (p<0.001 for all). In an HCV genotype 2a infection model, RNA analogs 5B-46, X-94, and X-12 in hepatic cells inhibited replication to 11%, 9%, and 12%, respectively. Because the X-12 analog was only 12% identical to the corresponding sequence of HCV genotype 2a, the sequence per se, or antisense effects were unlikely to be involved. CONCLUSIONS: The data suggest that conformation of secondary structures in 3′-UTR of HCV RNA genome is required for HCV replication. Stable expression of RNA analogs predicted to have identical stem-loop structures might inhibit HCV infection of hepatocytes in liver and may represent a novel approach to design anti-HCV agents. |
format | Online Article Text |
id | pubmed-4542080 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | XIA & HE Publishing Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-45420802015-09-09 Secondary Structural Elements of the HCV X-region Involved in Viral Replication Gupta, Nidhi Wu, Catherine H. Wu, George Y. J Clin Transl Hepatol Original Article BACKGROUND AND AIMS: The noncoding regions in the 3′-untranslated region (UTR) of the hepatitis C virus (HCV) genome contain secondary structures that are important for replication. The aim of this study was to identify detailed conformational elements of the X-region involved in HCV replication. METHODS: Ribonucleic acid (RNA) structural analogs X94, X12, and X12c were constructed to have identical conformation but 94%, 12%, and 0% sequence identity, respectively, to the X region of HCV genotype 2a. Effects of structural analogs on replication of HCV genotypes 1b and 2a HCV RNA were studied by quantitative reverse transcriptase polymerase chain reaction. RESULTS: In replicon BB7 cells, a constitutive replication model, HCV RNA levels decreased to 55%, 52%, 53%, and 54% after transfection with expression plasmids generating RNA structural analogs 5B-46, X-94, X-12, and X-12c, respectively (p<0.001 for all). In an HCV genotype 2a infection model, RNA analogs 5B-46, X-94, and X-12 in hepatic cells inhibited replication to 11%, 9%, and 12%, respectively. Because the X-12 analog was only 12% identical to the corresponding sequence of HCV genotype 2a, the sequence per se, or antisense effects were unlikely to be involved. CONCLUSIONS: The data suggest that conformation of secondary structures in 3′-UTR of HCV RNA genome is required for HCV replication. Stable expression of RNA analogs predicted to have identical stem-loop structures might inhibit HCV infection of hepatocytes in liver and may represent a novel approach to design anti-HCV agents. XIA & HE Publishing Ltd 2015-03-15 2015-03 /pmc/articles/PMC4542080/ /pubmed/26356238 http://dx.doi.org/10.14218/JCTH.2015.00003 Text en © 2015 The Second Affiliated Hospital of Chongqing Medical University. Published by XIA & HE Publishing Ltd. All rights reserved. http://creativecommons.org/licenses/by-nc/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution-Noncommercial 4.0 Unported License, permitting all non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Gupta, Nidhi Wu, Catherine H. Wu, George Y. Secondary Structural Elements of the HCV X-region Involved in Viral Replication |
title | Secondary Structural Elements of the HCV X-region Involved in Viral Replication |
title_full | Secondary Structural Elements of the HCV X-region Involved in Viral Replication |
title_fullStr | Secondary Structural Elements of the HCV X-region Involved in Viral Replication |
title_full_unstemmed | Secondary Structural Elements of the HCV X-region Involved in Viral Replication |
title_short | Secondary Structural Elements of the HCV X-region Involved in Viral Replication |
title_sort | secondary structural elements of the hcv x-region involved in viral replication |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4542080/ https://www.ncbi.nlm.nih.gov/pubmed/26356238 http://dx.doi.org/10.14218/JCTH.2015.00003 |
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