Ribavirin enhances the action of interferon-α against hepatitis C virus by promoting the p53 activity through the ERK1/2 pathway.
<h4>Background/aims</h4>Ribavirin significantly enhances the antiviral response of interferon-α (IFN-α) against Hepatitis C virus (HCV), but the underlying mechanisms remain poorly understood. Recently, p53 has been identified as an important factor involving the suppression of HCV repli...
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2012
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oai:doaj.org-article:294a1618e42a4fe6a18367950b085b152021-11-18T07:06:45ZRibavirin enhances the action of interferon-α against hepatitis C virus by promoting the p53 activity through the ERK1/2 pathway.1932-620310.1371/journal.pone.0043824https://doaj.org/article/294a1618e42a4fe6a18367950b085b152012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22962590/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background/aims</h4>Ribavirin significantly enhances the antiviral response of interferon-α (IFN-α) against Hepatitis C virus (HCV), but the underlying mechanisms remain poorly understood. Recently, p53 has been identified as an important factor involving the suppression of HCV replication in hepatocytes. We, therefore, decided to investigate whether and how ribavirin inhibits the replication of HCV by promoting the activity of p53.<h4>Methods</h4>HepG2 and HCV replicons (JFH1/HepG2) were utilized to study the relationship between ribavirin and p53. The effect of ribavirin on cell cycles was analyzed by flow cytometry. The activation of p53 and the signaling pathways were determined using immunoblotting. By knocking down ERK1/ERK2 and p53 utilizing RNA interference strategy, we further assessed the role of ERK1/2 and p53 in the suppression of HCV replication by ribavirin in a HCV replicon system.<h4>Results</h4>Using HepG2 and HCV replicons, we demonstrated that ribavirin caused the cell cycle arrest at G1 phase and stabilized and activated p53, which was associated with the antiviral activity of ribavirin. Compared to either ribavirin or IFN-α alone, ribavirin plus IFN-α resulted in greater p53 activation and HCV suppression. We further identified ERK1/2 that linked ribavirin signals to p53 activation. More importantly, knockdown of ERK1/2 and p53 partially mitigated the inhibitory effects of ribavirin on the HCV replication, indicating that ERK1/2-p53 pathway was involved in the anti-HCV effects of ribavirin.<h4>Conclusion</h4>Ribavirin stimulates ERK1/2 and subsequently promotes p53 activity which at least partly contributes to the enhanced antiviral response of IFN-α plus ribavirin against HCV.Wei-Liang LiuHung-Chih YangWen-Cheng SuChih-Chiang WangHui-Ling ChenHurng-Yi WangWen-Hung HuangDing-Shinn ChenMing-Yang LaiPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 9, p e43824 (2012) |
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Medicine R Science Q Wei-Liang Liu Hung-Chih Yang Wen-Cheng Su Chih-Chiang Wang Hui-Ling Chen Hurng-Yi Wang Wen-Hung Huang Ding-Shinn Chen Ming-Yang Lai Ribavirin enhances the action of interferon-α against hepatitis C virus by promoting the p53 activity through the ERK1/2 pathway. |
| description |
<h4>Background/aims</h4>Ribavirin significantly enhances the antiviral response of interferon-α (IFN-α) against Hepatitis C virus (HCV), but the underlying mechanisms remain poorly understood. Recently, p53 has been identified as an important factor involving the suppression of HCV replication in hepatocytes. We, therefore, decided to investigate whether and how ribavirin inhibits the replication of HCV by promoting the activity of p53.<h4>Methods</h4>HepG2 and HCV replicons (JFH1/HepG2) were utilized to study the relationship between ribavirin and p53. The effect of ribavirin on cell cycles was analyzed by flow cytometry. The activation of p53 and the signaling pathways were determined using immunoblotting. By knocking down ERK1/ERK2 and p53 utilizing RNA interference strategy, we further assessed the role of ERK1/2 and p53 in the suppression of HCV replication by ribavirin in a HCV replicon system.<h4>Results</h4>Using HepG2 and HCV replicons, we demonstrated that ribavirin caused the cell cycle arrest at G1 phase and stabilized and activated p53, which was associated with the antiviral activity of ribavirin. Compared to either ribavirin or IFN-α alone, ribavirin plus IFN-α resulted in greater p53 activation and HCV suppression. We further identified ERK1/2 that linked ribavirin signals to p53 activation. More importantly, knockdown of ERK1/2 and p53 partially mitigated the inhibitory effects of ribavirin on the HCV replication, indicating that ERK1/2-p53 pathway was involved in the anti-HCV effects of ribavirin.<h4>Conclusion</h4>Ribavirin stimulates ERK1/2 and subsequently promotes p53 activity which at least partly contributes to the enhanced antiviral response of IFN-α plus ribavirin against HCV. |
| format |
article |
| author |
Wei-Liang Liu Hung-Chih Yang Wen-Cheng Su Chih-Chiang Wang Hui-Ling Chen Hurng-Yi Wang Wen-Hung Huang Ding-Shinn Chen Ming-Yang Lai |
| author_facet |
Wei-Liang Liu Hung-Chih Yang Wen-Cheng Su Chih-Chiang Wang Hui-Ling Chen Hurng-Yi Wang Wen-Hung Huang Ding-Shinn Chen Ming-Yang Lai |
| author_sort |
Wei-Liang Liu |
| title |
Ribavirin enhances the action of interferon-α against hepatitis C virus by promoting the p53 activity through the ERK1/2 pathway. |
| title_short |
Ribavirin enhances the action of interferon-α against hepatitis C virus by promoting the p53 activity through the ERK1/2 pathway. |
| title_full |
Ribavirin enhances the action of interferon-α against hepatitis C virus by promoting the p53 activity through the ERK1/2 pathway. |
| title_fullStr |
Ribavirin enhances the action of interferon-α against hepatitis C virus by promoting the p53 activity through the ERK1/2 pathway. |
| title_full_unstemmed |
Ribavirin enhances the action of interferon-α against hepatitis C virus by promoting the p53 activity through the ERK1/2 pathway. |
| title_sort |
ribavirin enhances the action of interferon-α against hepatitis c virus by promoting the p53 activity through the erk1/2 pathway. |
| publisher |
Public Library of Science (PLoS) |
| publishDate |
2012 |
| url |
https://doaj.org/article/294a1618e42a4fe6a18367950b085b15 |
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