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- Title
Hepatitis C virus genotype 1 infection: Prevalence of NS5A and NS5B resistance‐associated substitutions in naïve patients from Argentina.
- Authors
Martínez, Alfredo P.; García, Gabriel; Ridruejo, Ezequiel; Culasso, Andrés CA; Pérez, Paula S.; Pereson, Matías J; Neukam, Karin; Flichman, Diego; Di Lello, Federico A.
- Abstract
Direct acting antiviral (DAA) therapy against hepatitis C virus (HCV) increases sustained virologic response rates. Nevertheless, drug resistance has occasionally been associated with failure to DAA. However, the information about the prevalence of NS5A and NS5B resistance‐associated substitutions (RASs) in Argentina is very scarce. In this study, we determine the prevalence of NS5A and NS5B resistances to treatment in Argentinean DAA treatment‐naïve patients chronically infected with genotype 1 (HCV‐1). In this retrospective cross‐sectional study, 108 HCV‐1‐infected patients were studied. RASs in NS5A and NS5B were analyzed by Sanger at baseline and phylogenetic analysis was performed. NS5A and NS5B RASs were detected in 25.8% and 6.3% of the analyzed sequences, respectively. The most frequent primary RASs for NS5A were L31M (7.5%) and Y93H (3.2%) and for NS5B was L159F (3.8%). No association between the presence of RASs and the outcome of DAA treatment was found in this study. Additionally, most of the Argentinean samples were randomly distributed among sequences around the world in the phylogenetic analysis. Only one significant Argentinean cluster was observed in both regions but without any particular RASs pattern. Baseline RASs in NS5A and NS5B were frequently observed in HCV‐1‐infected patients from Buenos Aires, Argentina but not related to treatment outcome. No clusters related to RASs transmission were observed in the phylogenetic analysis. The frequency of RASs detected in this study supports the need for more molecular epidemiology studies on RASs to adjust local treatment guidelines with the incorporation of autochthonous data. Highlight: RASs in NS5B were exclusively detected in HCV‐1b infected patients.RASs were more frequent in NS5A than in NS5B.There was not significant effect of baseline RASs in NS5A or NS5B on SVR.Most HCV‐1b samples from Argentina constituted a cluster without any particular RASs pattern.
- Subjects
ARGENTINA; BUENOS Aires (Argentina : Province); HEPATITIS C virus; MOLECULAR epidemiology; GENOTYPES; DISEASE prevalence; DRUG resistance
- Publication
Journal of Medical Virology, 2019, Vol 91, Issue 11, p1970
- ISSN
0146-6615
- Publication type
Article
- DOI
10.1002/jmv.25536