Naturally occurring mutations associated with resistance to HCV NS5B polymerase and NS3 protease inhibitors in treatment-naïve patients with chronic hepatitis C.
Virol J
; 12: 186, 2015 Nov 14.
Article
em En
| MEDLINE
| ID: mdl-26577836
ABSTRACT
BACKGROUND:
The detection of baseline resistance mutations to new direct-acting antivirals (DAAs) in HCV chronically infected treatment-naïve patients could be important for their management and outcome prevision. In this study, we investigated the presence of mutations, which have been previously reported to be associated with resistance to DAAs in HCV polymerase (NS5B) and HCV protease (NS3) regions, in sera of treatment-naïve patients.FINDINGS:
HCV RNA from 152 naïve patients (84 % Italian and 16 % immigrants from various countries) infected with different HCV genotypes (21,1a; 21, 1b; 2, 2a; 60, 2c; 22, 3a; 25, 4d and 1, 4k) was evaluated for sequence analysis. Amplification and sequencing of fragments in the NS5B (nt 8256-8640) and NS3 (nt 3420-3960) regions of HCV genome were carried out for 152 and 28 patients, respectively. The polymorphism C316N/H in NS5B region, associated with resistance to sofosbuvir, was detected in 9 of the 21 (43 %) analysed sequences from genotype 1b-infected patients. Naturally occurring mutations V36L, and M175L in the NS3 protease region were observed in 100 % of patients infected with subtype 2c and 4.CONCLUSION:
A relevant proportion of treatment naïve genotype 1b infected patients evaluated in this study harboured N316 polymorphism and might poorly respond to sofosbuvir treatment. As sofosbuvir has been approved for treatment of HCV chronic infection in USA and Europe including Italy, pre-treatment testing for N316 polymorphism on genotype 1b naïve patients should be considered for this drug.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Antivirais
/
Inibidores de Proteases
/
Proteínas não Estruturais Virais
/
Hepacivirus
/
Mutação de Sentido Incorreto
/
Farmacorresistência Viral
Tipo de estudo:
Risk_factors_studies
Limite:
Adult
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Aged
/
Aged80
/
Humans
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Male
/
Middle aged
País como assunto:
Europa
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article