CLEC-2 is a phagocytic activation receptor expressed on murine peripheral blood neutrophils

AM Kerrigan, KM Dennehy, D Mourao-Sa… - The Journal of …, 2009 - journals.aai.org
AM Kerrigan, KM Dennehy, D Mourao-Sa, I Faro-Trindade, JA Willment, PR Taylor, JA Eble…
The Journal of Immunology, 2009journals.aai.org
CLEC-2 is a member of the “dectin-1 cluster” of C-type lectin-like receptors and was
originally thought to be restricted to platelets. In this study, we demonstrate that murine
CLEC-2 is also expressed by peripheral blood neutrophils, but only weakly by bone marrow
or elicited inflammatory neutrophils. On circulating neutrophils, CLEC-2 can mediate
phagocytosis of Ab-coated beads and the production of proinflammatory cytokines, including
TNF-α, in response to the CLEC-2 ligand, rhodocytin. CLEC-2 possesses a tyrosine-based …
Abstract
CLEC-2 is a member of the “dectin-1 cluster” of C-type lectin-like receptors and was originally thought to be restricted to platelets. In this study, we demonstrate that murine CLEC-2 is also expressed by peripheral blood neutrophils, but only weakly by bone marrow or elicited inflammatory neutrophils. On circulating neutrophils, CLEC-2 can mediate phagocytosis of Ab-coated beads and the production of proinflammatory cytokines, including TNF-α, in response to the CLEC-2 ligand, rhodocytin. CLEC-2 possesses a tyrosine-based cytoplasmic motif similar to that of dectin-1, and we show using chimeric analyses that the activities of this receptor are dependent on this tyrosine. Like dectin-1, CLEC-2 can recruit the signaling kinase Syk in myeloid cells, however, stimulation of this pathway does not induce the respiratory burst. These data therefore demonstrate that CLEC-2 expression is not restricted to platelets and that it functions as an activation receptor on neutrophils.
journals.aai.org