Tongue Epithelium Cells from shRNA Mediated Transgenic Goat Show High Resistance to Foot and Mouth Disease Virus

Sci Rep. 2015 Dec 16:5:17897. doi: 10.1038/srep17897.

Abstract

Foot and mouth disease induced by foot and mouth disease virus (FMDV) is severe threat to cloven-hoofed domestic animals. The gene 3Dpol in FMDV genome encodes the viral RNA polymerase, a vital element for FMDV replication. In this study, a conserved 3D-7414shRNA targeting FMDV-3Dpol gene was designed and injected into pronuclear embryos to produce the transgenic goats. Sixty-one goats were produced, of which, seven goats positively integrated 3D-7414shRNA. Loss of function assay demonstrated that siRNA effectively knockdown 3Dpol gene in skin epithelium cells of transgenic goats. Subsequently, the tongue epithelium cells from transgenic and non-transgenic goats were infected with FMDV O/YS/CHA/05 strain. A significant decrease of virus titres and virus copy number was observed in cells of transgenic goats compared with that of non-transgenic goats, which indicated that 3D-7414siRNA inhibited FMDV replication by interfering FMDV-3Dpol gene. Furthermore, we found that expression of TLR7, RIG-I and TRAF6 was lower in FMDV infected cells from transgenic goats compared to that from non-transgenic goats, which might result from lower virus copy number in transgenic goats' cells. In conclusion, we successfully produced transgenic goats highly expressing 3D-7414siRNA targeting 3Dpol gene, and the tongue epithelium cells from the transgenic goats showed effective resistance to FMDV.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Animals, Genetically Modified
  • Disease Resistance / genetics*
  • Epithelial Cells / metabolism*
  • Epithelial Cells / virology*
  • Foot-and-Mouth Disease / genetics*
  • Foot-and-Mouth Disease / virology*
  • Foot-and-Mouth Disease Virus*
  • Gene Expression
  • Gene Expression Profiling
  • Gene Knockdown Techniques
  • Goats
  • RNA Interference
  • RNA, Small Interfering*
  • Receptors, Virus / genetics
  • Receptors, Virus / metabolism
  • Tongue / cytology*

Substances

  • RNA, Small Interfering
  • Receptors, Virus