Insertion of type O-conserved neutralizing epitope into the foot-and-mouth disease virus type Asia1 VP1 G-H loop: effect on viral replication and neutralization phenotype

J Gen Virol. 2012 Jul;93(Pt 7):1442-1448. doi: 10.1099/vir.0.040253-0. Epub 2012 Apr 18.

Abstract

Previously, we finely mapped the neutralizing epitopes recognized by foot-and-mouth disease virus (FMDV) type Asia1-specific mAb 3E11 and FMDV type O-specific mAb 8E8. In this study, we engineered recombinant FMDVs of the serotype Asia1 (rFMDVs) displaying the type O-neutralizing epitope recognized by the mAb 8E8. These epitope-inserted viruses were genetically stable and exhibited growth properties that were similar to those of their parental virus. Importantly, the recombinant virus rFMDV-C showed neutralization sensitivity to both FMDV type Asia1 and type O mAbs, as well as to polyclonal antibodies. These results indicated that this epitope-inserted virus has the potential to induce neutralizing antibodies against both FMDV type Asia1 and type O. Our results demonstrated that the G-H loop of FMDV type Asia1 effectively displays the protective neutralizing epitopes of other FMDV serotypes, making this an attractive approach for the design of novel FMDV vaccines.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antibodies, Monoclonal / immunology
  • Antibodies, Neutralizing / blood*
  • Antibodies, Neutralizing / immunology
  • Antibodies, Viral / blood*
  • Antibodies, Viral / immunology
  • Capsid Proteins / genetics*
  • Capsid Proteins / immunology*
  • Epitopes / genetics
  • Epitopes / immunology
  • Foot-and-Mouth Disease Virus / genetics
  • Foot-and-Mouth Disease Virus / growth & development
  • Foot-and-Mouth Disease Virus / immunology*
  • Mutagenesis, Insertional*
  • Neutralization Tests
  • Phenotype
  • Recombination, Genetic

Substances

  • Antibodies, Monoclonal
  • Antibodies, Neutralizing
  • Antibodies, Viral
  • Capsid Proteins
  • Epitopes
  • VP1 protein, Foot-and-mouth disease virus