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Functional characterisation of bovine TLR5 indicates species-specific recognition of flagellin.

Metcalfe, HJ, La Ragione, RM, Smith, DG and Werling, D (2013) Functional characterisation of bovine TLR5 indicates species-specific recognition of flagellin. Vet Immunol Immunopathol.

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Abstract

Mammalian toll-like receptor 5 (TLR5) senses flagellin of several bacterial species and has been described to activate the innate immune system. To assess the role of bovine TLR5 (boTLR5) in the cattle system, we cloned and successfully expressed boTLR5 in human embryonic kidney (HEK) 293 cells, as indicated by quantitative PCR and confocal microscopy. However, in contrast to huTLR5-transfected cells, exposure of boTLR5-transfected cells to flagellin neither activated nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) nor CXCL8 production. Subsequent comparison of the flagellin response induced in human and bovine primary macrophages revealed that flagellin did not lead to phosphorylation of major signalling molecules. Furthermore, the CXCL8 and TNFα response of primary bovine macrophages stimulated with flagellin was very low compared to that observed in human primary macrophages. Our results indicate that cattle express a functional TLR5 albeit with different flagellin sensing qualities compared to human TLR5. However, boTLR5 seemed to play a different role in the bovine system compared to the human system in recognizing flagellin, and other potentially intracellular expressed receptors may play a more important role in the bovine system to detect flagellin.

Item Type: Article
Authors :
NameEmailORCID
Metcalfe, HJUNSPECIFIEDUNSPECIFIED
La Ragione, RMr.laragione@surrey.ac.ukUNSPECIFIED
Smith, DGUNSPECIFIEDUNSPECIFIED
Werling, DUNSPECIFIEDUNSPECIFIED
Date : 30 December 2013
Identification Number : 10.1016/j.vetimm.2013.12.006
Uncontrolled Keywords : Cattle, Flagellin, Human, TLR5
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 10:06
Last Modified : 17 May 2017 14:47
URI: http://epubs.surrey.ac.uk/id/eprint/826360

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