ZFIN ID: ZDB-PUB-160126-1
Characterization of bovine A20 gene: Expression mediated by NF-κB pathway in MDBK cells infected with bovine viral diarrhea virus-1
Fredericksen, F., Villalba, M., Olavarría, V.H.
Date: 2016
Source: Gene 581(2): 117-29 (Journal)
Registered Authors:
Keywords: A20, BVDV-1, Half-life, NF-κB, Synteny
MeSH Terms:
  • Animals
  • Bovine Virus Diarrhea-Mucosal Disease/genetics*
  • Bovine Virus Diarrhea-Mucosal Disease/immunology*
  • Bovine Virus Diarrhea-Mucosal Disease/virology
  • Catalytic Domain
  • Cattle
  • Cell Line
  • DNA-Binding Proteins/chemistry
  • DNA-Binding Proteins/genetics*
  • DNA-Binding Proteins/metabolism*
  • Gene Expression Regulation*/drug effects
  • Humans
  • Intracellular Signaling Peptides and Proteins/chemistry
  • Intracellular Signaling Peptides and Proteins/genetics*
  • Intracellular Signaling Peptides and Proteins/immunology*
  • Mice
  • NF-kappa B/metabolism*
  • Nitriles/pharmacology
  • Nuclear Proteins/chemistry
  • Nuclear Proteins/genetics*
  • Nuclear Proteins/metabolism*
  • RNA, Messenger/metabolism
  • Sequence Homology, Amino Acid
  • Signal Transduction/drug effects
  • Sulfones/pharmacology
PubMed: 26809100 Full text @ Gene
Cytokine production for immunological process is tightly regulated at the transcriptional and posttranscriptional levels. The NF-κB signaling pathway maintains immune homeostasis in the cell through the participation of molecules such as A20 (TNFAIP3), which is a key regulatory factor in the immune response, haemotopoietic differentiation, and immunomodulation. Although A20 has been identified in mammals, and despite recent efforts to identify A20 members in other higher vertebrates, relatively little is known about the composition of this regulator in other classes of vertebrates, particularly for bovines. In this study, the genetic context of bovine A20 was explored and compared against homologous genes in the human, mouse, chicken, dog, and zebrafish chromosomes. Through in silico analysis, several regions of interest were found conserved between even phylogenetically distant species. Additionally, a protein-deduced sequence of bovine A20 evidenced many conserved domains in humans and mice. Furthermore, all potential amino acid residues implicated in the active site of A20 were conserved. Finally, bovine A20 mRNA expression as mediated by the bovine viral diarrhea virus and poly (I:C) was evaluated. These analyses evidenced a strong fold increase in A20 expression following virus exposure, a phenomenon blocked by a pharmacological NF-κB inhibitor (BAY 117085). Interestingly, A20 mRNA had a half-life of only 32 min, likely due to adenylate- and uridylate-rich elements in the 3'-untranslated region. Collectively, these data identify bovine A20 as a regulator of immune marker expression. Finally, this is the first report to find the bovine viral diarrhea virus modulating bovine A20 activation through the NF-κB pathway.