An approach to a FMD vaccine based on genetic engineered attenuated pseudorabies virus: one experiment using VP1 gene alone generates an antibody responds on FMD and pseudorabies in swine

Vaccine. 2004 Jun 2;22(17-18):2129-36. doi: 10.1016/j.vaccine.2003.12.005.

Abstract

Foot-and-mouth disease (FMD) and pseudorabies (PR) are two important infectious diseases in swine. An attenuated pseudorabies virus (PRV) has been successfully used as a gene delivery vector for the development of live-viral vaccines. In this study, a recombinant PRV-VP1 virus was constructed by fusioning the VP1 gene of FMD virus in frame to the N-terminal sequence of the gG gene of PRV. To test the protective immunity, 15 FMDV sero-negative white swine were divided into three groups and immunized with the recombinant PRV-VP1 virus, commercial FMD vaccine and vector virus (TK(-)/gG(-)/LacZ(+)), respectively, and challenged intramuscularly with 20 minimal infecting doses (MID) of virulent type O FMDV 4 weeks after booster immunization. Swine vaccinated with PRV-VP1 acquired antibodies against both FMDV and PRV, however, anti-FMDV antibodies were much lower than those vaccinated with the commercial FMD vaccine. Our results suggested that the recombinant PRV-VP1 virus, which only expressed FMDV VP1 gene controlled by PRV gG promoter, could not protect swine from the challenge of 20 MID type O FMDV, but could delay and reduce the clinical symptoms of FMD.

Publication types

  • Clinical Trial
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antibodies, Viral / blood
  • Capsid Proteins / genetics*
  • Capsid Proteins / immunology
  • Fever / veterinary
  • Foot / pathology
  • Foot-and-Mouth Disease / physiopathology
  • Foot-and-Mouth Disease / prevention & control*
  • Foot-and-Mouth Disease Virus / genetics
  • Foot-and-Mouth Disease Virus / immunology*
  • Herpesvirus 1, Suid / genetics*
  • Herpesvirus 1, Suid / immunology
  • Neutralization Tests
  • Pseudorabies / prevention & control
  • Pseudorabies Vaccines / genetics
  • Pseudorabies Vaccines / immunology*
  • Swine / immunology
  • Swine / virology
  • Swine Diseases / physiopathology
  • Swine Diseases / prevention & control
  • Vaccination
  • Vaccines, Attenuated / immunology
  • Vaccines, Synthetic / immunology
  • Viral Vaccines / genetics
  • Viral Vaccines / immunology*

Substances

  • Antibodies, Viral
  • Capsid Proteins
  • Pseudorabies Vaccines
  • VP1 protein, Foot-and-mouth disease virus
  • Vaccines, Attenuated
  • Vaccines, Synthetic
  • Viral Vaccines