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Growth properties and vaccine efficacy of recombinant pseudorabies virus defective in glycoprotein E and thymidine kinase genes

Paper ID Volume ID Publish Year Pages File Format Full-Text
22697 43370 2016 7 PDF Available
Title
Growth properties and vaccine efficacy of recombinant pseudorabies virus defective in glycoprotein E and thymidine kinase genes
Abstract

•A gE and TK double gene-deleted recombinant pseudorabies virus, gE−TK− PRV was derived.•Recombinant gE−TK− PRV was completely attenuated in mice and pigs.•gE−TK− PRV-vaccinated pigs had protective immune responses and were resistant to PRV challenge.

Pseudorabies virus (PRV) is an alphaherpesvirus that causes pseudorabies (PR), an economically important viral disease of pigs. Marker vaccines were widely used in PR prevention and eradication programs. The purpose of this study was to construct a novel recombinant virus with deletions at defined regions in the glycoprotein E (gE) and thymine kinase (TK) genes by homologous recombination. This study also evaluated the safety and efficacy of the virus for a live attenuated marker vaccine. No significant difference was observed in virus replication between gE gene-deleted (gE−), gE/TK double gene-deleted (gE−TK−), and wild-type PRV by growth curve analysis. However, gE−TK− PRV was completely attenuated in mice. To evaluate the immunogenicity of gE−TK− PRV, four 12-week-old specific-pathogen-free pigs per group were immunized intramuscularly with viral titers of 1 × 104, 1 × 105, or 1 × 106 TCID50, followed by intranasal challenge infection with virulent PRV (1 × 108 TCID50) at 3 weeks post vaccination. The gE−TK− PRV-vaccinated pigs displayed no general adverse effects after immunization and had protective immune responses after PRV challenge. Thus, gE−TK− PRV was safe and efficacious and might be a potential candidate for a live attenuated marker vaccine against PRV.

Keywords
Pseudorabies virus; Marker vaccine; Recombinant virus; Live attenuated virus
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Growth properties and vaccine efficacy of recombinant pseudorabies virus defective in glycoprotein E and thymidine kinase genes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 229, 10 July 2016, Pages 58–64
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us