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TREM-1 is an important signaling receptor expressed on neutrophils and monocytes that plays an important role in systemic infections. Here, we review the intracellular signaling pathways that mediate the immunological effects of TREM-1. Because of the absence of signaling motifs, TREM-1 constitutively associates with DAP12 for induction of intracellular signals. After phosphorylation of DAP12, production of chemokines and cytokines is induced. Moreover, TREM-1 also modulates signaling pathways induced by known classes of PRRs, such as TLRs and NLRs. The exact mechanisms through which TREM-1 influences TLR and NLR pathways are still largely elusive.

Citation

Rob J W Arts, Leo A B Joosten, Jos W M van der Meer, Mihai G Netea. TREM-1: intracellular signaling pathways and interaction with pattern recognition receptors. Journal of leukocyte biology. 2013 Feb;93(2):209-15

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PMID: 23108097

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