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J Viral Hepat ; 18(12): 861-70, 2011 Dec.
Article in English | MEDLINE | ID: mdl-21108698

ABSTRACT

Summary. To assess the natural variation in drug susceptibility among treatment-naïve hepatitis C virus (HCV) patient isolates, the susceptibilities of chimeric replicons carrying the HCV NS5B polymerase from up to 51 patient isolates against a panel of diverse HCV nonnucleoside polymerase inhibitors were evaluated using a replicon-based transient replication assay. Some patient to patient variation in susceptibility to the panel of three HCV nonnucleoside polymerase inhibitors was observed. Linear regression and correlation analyses revealed no correlations among the susceptibilities to the polymerase inhibitors tested. Our results suggest that variable antiviral responses to HCV nonnucleoside polymerase inhibitors may be observed because of the natural variation in baseline susceptibility. In addition, the lack of correlation among the susceptibilities to three classes of HCV polymerase inhibitors evaluated here supports their possible combined use in a combination therapy strategy.


Subject(s)
Antiviral Agents/pharmacology , Drug Resistance, Viral , Enzyme Inhibitors/pharmacology , Hepacivirus/drug effects , Hepacivirus/isolation & purification , Hepatitis C/virology , Viral Nonstructural Proteins/antagonists & inhibitors , Cell Line , Humans , Microbial Sensitivity Tests/methods , Virus Replication/drug effects
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