Molecular assessment of the role of envelope-associated structural proteins in cross neutralization among different PRRS viruses.
Virus Genes
; 37(3): 380-91, 2008 Dec.
Article
em En
| MEDLINE
| ID: mdl-18770017
ABSTRACT
To assess the role of each envelope-associated protein (i.e., ORFs 2-6 products) of type 2 PRRSV in cross neutralization mediated by antibody, chimeric mutants were generated by replacing ORFs of a VR2332-based infectious clone with those of JA142, SDSU73, PRRS124, or 2M11715 that are genetically and antigenically distinct from VR2332 and two-way neutralization assays were performed on those mutants using VR2332, JA142, SDSU73, or PRRS124 antisera. All ORF 5-replaced mutants showed increased susceptibility or resistance against homologous or heterologous antisera, respectively, in comparison to that of the donor strains, but failed to achieve a complete reversion of cross neutralization. In contrast, substitution of ORFs 3-6 completely reversed the susceptibility of the virus to neutralization by antibody. Changes in ORFs 3, 5, and 6 were additively responsible for reversion of the susceptibility, suggesting that the genetic similarity of these ORFs should be considered for better cross neutralization between two different type 2 PRRS viruses.
Texto completo:
1
Temas:
ECOS
/
Aspectos_gerais
Bases de dados:
MEDLINE
Assunto principal:
Proteínas do Envelope Viral
/
Vírus da Síndrome Respiratória e Reprodutiva Suína
/
Síndrome Respiratória e Reprodutiva Suína
Tipo de estudo:
Risk_factors_studies
Limite:
Animals
Idioma:
En
Revista:
Virus Genes
Assunto da revista:
BIOLOGIA MOLECULAR
/
VIROLOGIA
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Estados Unidos