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Viruses 2013, 5(2), 663-677; doi:10.3390/v5020663

Predicted Peptides from Non-Structural Proteins of Porcine Reproductive and Respiratory Syndrome Virus Are Able to Induce IFN-γ and IL-10

1
Laboratorio de Inmunología, Centro de Investigación en Alimentación y Desarrollo A.C (CIAD), Carretera a la Victoria Km 0.6, C.P. 83304 Hermosillo, Sonora, Mexico
2
Centre de Recerca en Sanitat Animal (CReSA), UAB-IRTA, Campus de la Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
3
Departamento de Anatomía y Anatomía Patológica Comparadas, Facultad de Veterinaria, Universidad de Córdoba, Córdoba, Spain
4
Department of Pathobiology, Institute of Immunology, University of Veterinary Medicine Vienna, Vienna, 1210, Austria
5
Departament de Sanitat i d'Anatomia Animals, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
*
Author to whom correspondence should be addressed.
Received: 26 December 2012 / Revised: 7 February 2013 / Accepted: 9 February 2013 / Published: 11 February 2013
(This article belongs to the Section Animal Viruses)
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Abstract

This work describes peptides from non-structural proteins (nsp) of porcine reproductive and respiratory syndrome virus (PRRSV) predicted as potential T cell epitopes by bioinfornatics and tested for their ability to induce IFN-γ and IL-10 responses. Pigs immunized with either genotype 1 or genotype 2 PRRSV attenuated vaccines (n=5/group) and unvaccinated pigs (n = 4) were used to test the peptides. Swine leukocyte antigen haplotype of each pig was also determined. Pigs were initially screened for IFN-γ responses (ELISPOT) and three peptides were identified; two of them in non-conserved segments of nsp2 and nsp5 and the other in a conserved region of nsp5 peptide. Then, peptides were screened for IL-10 inducing properties. Six peptides were found to induce IL-10 release in PBMC and some of them were also able to inhibit IFN-γ responses on PHA-stimulated cells. Interestingly, the IFN-γ low responder pigs against PRRSV were mostly homozygous for their SLA haplotypes. In conclusion, these results indicate that nsp of PRRSV contain T-cell epitopes inducing IFN-γ responses as well as IL-10 inducing segments with inhibitory capabilities.
Keywords: PRRSV; non-structural proteins; epitopes; interferon gamma; IL-10 PRRSV; non-structural proteins; epitopes; interferon gamma; IL-10
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Burgara-Estrella, A.; Díaz, I.; Rodríguez-Gómez, I.M.; Essler, S.E.; Hernández, J.; Mateu, E. Predicted Peptides from Non-Structural Proteins of Porcine Reproductive and Respiratory Syndrome Virus Are Able to Induce IFN-γ and IL-10. Viruses 2013, 5, 663-677.

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