Inability of FMDV replication in equine kidney epithelial cells is independent of integrin αvβ3 and αvβ6

Virology. 2016 May:492:251-8. doi: 10.1016/j.virol.2016.01.025. Epub 2016 Mar 21.

Abstract

Integrins can function as receptors for foot-and-mouth disease virus (FMDV) in epithelium. Horses are believed to be insusceptible to this disease, but the mechanism of resistance remains unclear. To detect whether FMDV can use integrin to attach to equine epithelial, we compared the utilities of αvβ3 and αvβ6 between bovine and equine kidney epithelial cells (KECs). Equine KECs showed almost equal efficiency to those of bovine. Further, the integrin αv, β3, and β6 subunits from bovine and equine were cloned and vectors were transfected into SW480 cells and COS-1 cells alone or together, and virus titers were used to determine the viral replication. In all cases, the virus reproduced successfully. Overall, FMDV can replicate in SW480 cells transfected with equine β3/β6 subunits and COS-1 cells transfected with equine αvβ3/αvβ6 integrins, but not in EKECs. These results indicated that failure of FMDV replication in EKECs was not attributed to integrin receptors.

Keywords: Bovine; Equine; FMDV; Integrin; Receptor.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antigens, Neoplasm / genetics
  • Antigens, Neoplasm / immunology*
  • COS Cells
  • Cattle
  • Chlorocebus aethiops
  • Cloning, Molecular
  • Cricetulus
  • Disease Resistance*
  • Epithelial Cells / immunology*
  • Epithelial Cells / pathology
  • Epithelial Cells / virology
  • Foot-and-Mouth Disease Virus / genetics*
  • Foot-and-Mouth Disease Virus / growth & development
  • Gene Expression
  • Horses
  • Host Specificity
  • Integrin alphaVbeta3 / genetics
  • Integrin alphaVbeta3 / immunology*
  • Integrins / genetics
  • Integrins / immunology*
  • Kidney / immunology
  • Kidney / pathology
  • Kidney / virology
  • Receptors, Virus / genetics
  • Receptors, Virus / immunology*
  • Recombinant Proteins / genetics
  • Recombinant Proteins / immunology
  • Transgenes
  • Virus Replication

Substances

  • Antigens, Neoplasm
  • Integrin alphaVbeta3
  • Integrins
  • Receptors, Virus
  • Recombinant Proteins
  • integrin alphavbeta6