Generation and immunogenicity of a recombinant pseudorabies virus expressing cap protein of porcine circovirus type 2

Vet Microbiol. 2007 Jan 31;119(2-4):97-104. doi: 10.1016/j.vetmic.2006.08.026. Epub 2006 Sep 26.

Abstract

Porcine circovirus type 2 (PCV2) is associated with post-weaning multisystemic wasting syndrome (PMWS), which is an important economical disease affecting the pig industry worldwide. In order to develop an effective vaccine for PMWS, a recombinant pseudorabies virus (PRV) was generated and tested in piglets in this study. The PCV2 open reading frame 2 (ORF2) gene was inserted into pIECMV plasmid and co-transfected with PRV Tk-/gE-/LacZ+ genome into IBRS-2 cells to generate a recombinant Tk-/gE-/ORF2(+) virus. The expression of PCV2 ORF2 gene in the recombinant virus was confirmed by Western blotting and indirect immunofluorescence assay (IFA). Four-week-old piglets were immunized by the recombinant virus, and the immunogenicity of PRV Tk-/gE-/ORF2(+) was tested by PRV-enzyme-linked immunosorbent assay (ELISA), PRV neutralizing assay, ORF2-ELISA and ORF2 specific lymphocyte proliferation response. PRV Tk-/gE-/ORF2(+) elicited significant humoral immune responses to both PRV and PCV2, and the PCV2-specific lymphocyte proliferation response could be detected on day 49 of this experiment. These findings suggest that the recombinant PRV Tk-/gE-/ORF2(+) may be a potential vaccine against both PCV2 and PRV.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Blotting, Western / veterinary
  • Capsid Proteins / biosynthesis
  • Capsid Proteins / genetics
  • Capsid Proteins / immunology*
  • Circoviridae Infections / immunology
  • Circoviridae Infections / prevention & control
  • Circoviridae Infections / veterinary*
  • Circoviridae Infections / virology
  • Circovirus / genetics
  • Circovirus / immunology*
  • Enzyme-Linked Immunosorbent Assay / veterinary
  • Fluorescent Antibody Technique, Indirect / veterinary
  • Genetic Vectors
  • Herpesvirus 1, Suid / genetics
  • Herpesvirus 1, Suid / immunology
  • Immunization / veterinary
  • Lymphocyte Activation
  • Neutralization Tests / veterinary
  • Open Reading Frames
  • Random Allocation
  • Recombinant Fusion Proteins / genetics
  • Recombinant Fusion Proteins / immunology
  • Swine
  • Swine Diseases / immunology
  • Swine Diseases / prevention & control
  • Swine Diseases / virology*
  • Vaccines, Synthetic
  • Viral Vaccines* / genetics
  • Viral Vaccines* / immunology
  • Wasting Syndrome / immunology
  • Wasting Syndrome / prevention & control
  • Wasting Syndrome / veterinary*
  • Wasting Syndrome / virology

Substances

  • Capsid Proteins
  • Recombinant Fusion Proteins
  • Vaccines, Synthetic
  • Viral Vaccines