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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

A DAP12- mediated pathway regulates expression of CC chemokine receptor 7 and maturation of human dendritic cells.

Gene targeting of the adaptor molecule DAP12 in mice caused abnormal distribution and impaired antigen presentation capacity of dendritic cells (DCs). However, the DAP12-associated receptors expressed on DCs and their functions have not been identified yet. Here we show that the triggering receptor expressed on myeloid cells-2 (TREM-2) is a cell surface receptor on human monocyte-derived DCs, which is associated with DAP12. TREM-2/DAP12 promotes upregulation of CC chemokine receptor 7, partial DC maturation, and DC survival through activation of protein tyrosine kinases and extracellular signal-regulated kinase. In contrast to Toll-like receptor-mediated signaling, TREM2/DAP12 stimulation is independent of nuclear factor-kappaB and p38 stress-activated protein kinase. This novel DC activation pathway may regulate DC homeostasis and amplify DC responses to pathogens, explaining the phenotype observed in DAP12-deficient mice.[1]


  1. A DAP12-mediated pathway regulates expression of CC chemokine receptor 7 and maturation of human dendritic cells. Bouchon, A., Hernández-Munain, C., Cella, M., Colonna, M. J. Exp. Med. (2001) [Pubmed]
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