Epitopes described in "Development of a porcine reproductive and respiratory syndrome virus differentiable (DIVA) strain through deletion of specific immunodominant epitopes."

Article Authors:Marcelo de Lima; Byungjoon Kwon; Israrul H Ansari; Asit K Pattnaik; Eduardo F Flores; Fernando A Osorio
Article Title:Development of a porcine reproductive and respiratory syndrome virus differentiable (DIVA) strain through deletion of specific immunodominant epitopes.
Reference Detail
Reference ID:1012308
Abstract:The availability of a DIVA (differentiating infected from vaccinated animals) vaccine is very important for the control and eradication of endemic infectious diseases such as porcine reproductive and respiratory syndrome (PRRS). Previous studies in our laboratory identified several B-cell linear epitopes consistently recognized by convalescent sera obtained from pigs infected with a North American porcine reproductive and respiratory syndrome virus (PRRSV) strain. To ascertain if one or more of these immunodominant epitopes can be used as the basis of DIVA differentiation, we selected two epitope markers previously identified on the non-structural protein 2 (PRRSV NSP2, predictably the viral protein most likely to tolerate large deletions). The choice of these epitopes was primarily based on their immunodominance and their deletion were performed along the backbone of the wild-type cDNA infectious clone (FL12). We were able to successfully rescue a mutant that fulfilled the requirements for a DIVA marker strain, such as: efficient growth of the deletion mutant in vitro and in vivo and induction of specific seroconversion as measured by a commercial ELISA kit, with absence of a marker-specific peptide-ELISA response in 100% (n=15) of the inoculated animals. In summary, our results provide proof of concept that DIVA PRRSV vaccines can potentially be developed by deletion of individual "marker" immunodominant epitopes.
Affiliations:Nebraska Center for Virology and Department of Veterinary and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE 68583-0900, USA.
Reference Type:Literature
PubMed ID:18538899
Journal Volume:26
Article Pages:3594-600
Journal ISSN:0264-410X
Article Chemical List:Antibodies, Viral;Biological Markers;Immunodominant Epitopes;Viral Vaccines
Article MeSH List:Animals; Antibodies, Viral(blood); Biological Markers; Immunodominant Epitopes(genetics; immunology); Porcine Reproductive and Respiratory Syndrome(prevention & control); Porcine respiratory and reproductive syndrome virus(genetics; growth & development; immunology); Sequence Deletion; Swine; Viral Vaccines(genetics; immunology); Viremia
Curation Last Updated:2014-10-03 21:10:13