Expression profiles of Toll-like receptors 1, 2 and 5 in selected organs of commercial and indigenous chickens

J Appl Genet. 2013 Nov;54(4):489-92. doi: 10.1007/s13353-013-0161-1. Epub 2013 Jul 20.

Abstract

Toll-like receptors (TLRs) are members of the cellular receptors that constitute a major component of the evolutionary conserved pattern recognition system (PRR). TLRs are expressed in a wide variety of tissues and cell types. In this study we compared the expression profiles of the chicken TLR1, TLR2 and TLR5 genes in a range of organs (lung, ovary, liver, thymus, duodenum, spleen and large intestine) in commercial Hy-Line (HL) and indigenous Green-legged Partridgelike (GP) chickens. The level of mRNA was determined with RT-qPCR using the TaqMan probes for target and reference (ACTB) genes. We determined that the tissue profiles differed with respect to each TLR and they were ranked as follows: spleen, lungs, large intestine (TLR1), large intestine, lungs, thymus/ovary (TLR2) and lungs, thymus, liver (TLR5). A differential expression between HL and GP chickens was determined for TLR1 and TLR5 genes in large intestine and thymus of HL (P < 0.05) and GP (P < 0.05) chickens. We conclude that the commercial chickens expressed higher levels of TLR1 mRNA in large intestine and TLR5 mRNA in thymus than indigenous chickens.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Chickens / genetics*
  • Female
  • Gene Expression Profiling / veterinary*
  • Intestinal Mucosa / metabolism
  • Liver / metabolism
  • Ovary / metabolism
  • RNA, Messenger / genetics
  • RNA, Messenger / metabolism
  • Spleen / metabolism
  • Thymus Gland / metabolism
  • Toll-Like Receptors / genetics*
  • Toll-Like Receptors / metabolism

Substances

  • RNA, Messenger
  • Toll-Like Receptors