Association of hepatitis C virus NS5B variants with resistance to new antiviral drugs among untreated patients
Mem. Inst. Oswaldo Cruz
;
106(8): 968-975, Dec. 2011. graf, tab
Artigo
em Inglês
| LILACS
| ID: lil-610971
ABSTRACT
Mutations located in the 109-amino acid fragment of NS5B are typically associated with resistance to interferon (IFN) and ribavirin (RIB) and to new antiviral drugs. The prevalence of these mutations was examined in 69 drug-naïve individuals with hepatitis C virus (HCV) infections in Rio de Janeiro, Brazil. Mutations related to non-response to IFN/RIB were observed in all subtypes studied (1a, 1b, 2b, 3a and 4). The most common mutation was Q309R, present in all subtypes, except subtype 2b with frequency above 20 percent. D244N was detected only in subtype 3a and A333E was detected only in subtype 2b. We did not detect the S282T, S326G or T329I mutations in any of the samples analysed. Of note, the C316N mutation, previously related to a new non-nucleoside compound (HCV796 and AG-021541), was observed in only eight of 33 (24 percent) samples from subtype 1b. Site 316 was under positive selection in this HCV variant. Our data highlight the presence of previously described resistance mutations in HCV genotypes from drug-naïve patients.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Antivirais
/
Ribavirina
/
Interferons
/
Hepatite C
/
Proteínas não Estruturais Virais
/
Hepacivirus
/
Farmacorresistência Viral
Tipo de estudo:
Fatores de risco
Limite:
Adulto
/
Idoso
/
Aged80
/
Feminino
/
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Mem. Inst. Oswaldo Cruz
Assunto da revista:
Medicina Tropical
/
Parasitologia
Ano de publicação:
2011
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Federal do Rio de Janeiro/BR
/
Universidade do Estado do Rio de Janeiro/BR
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