Expression and function of triggering receptor expressed on myeloid cells-1 (TREM-1) on canine neutrophils.

Abstract:

:The dog is both a valued veterinary species and a widely used translational model for sepsis research. However, relatively little work has been performed evaluating potential biomarkers present during canine infection. Triggering receptor expressed on myeloid cells-1 (TREM-1) has shown promise as a biomarker for infection and pneumonia in humans. Here we describe, for the first time, the expression and function of the canine orthologue of TREM-1. Expression of TREM-1 on canine neutrophils is significantly up-regulated by stimulation with microbial agonists of TLR2/6, TLR1/2, and TLR4/MD2. Kinetics of TREM-1 protein up-regulation are rapid, with significant increases observed within 2 hr of neutrophil activation. Functionally, canine TREM-1 synergistically enhances LPS-induced production of IL-8, TNF-α and a canine orthologue of CXCL1. Collectively, these data suggest that TREM-1 expression in dogs, as it is in humans, is an amplifier of pro-inflammatory responses to microbial products. These results have direct application to veterinary diagnostics as well as the potential to enhance the utility of canine disease models in the assessment of potential therapeutics in the treatment of human sepsis.

journal_name

Dev Comp Immunol

authors

Li J,Birkenheuer AJ,Marr HS,Levy MG,Yoder JA,Nordone SK

doi

10.1016/j.dci.2011.03.021

subject

Has Abstract

pub_date

2011-08-01 00:00:00

pages

872-80

issue

8

eissn

0145-305X

issn

1879-0089

pii

S0145-305X(11)00093-0

journal_volume

35

pub_type

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