PMID: 7542306Jul 1, 1995Paper

CD66-dependent neutrophil activation: a possible mechanism for vascular selectin-mediated regulation of neutrophil adhesion

Journal of Leukocyte Biology
S C StocksI Dransfield

Abstract

We have examined the role of CD66 in the modulation of neutrophil adhesion and effector function. Engagement of neutrophil CD66 with anti-carcinoembryonic antigen (anti-CEA) Ig results in activation-associated phenomena including shape change, activation of beta 2-integrins, and priming of the respiratory burst. Anti-CEA Ig-treated neutrophils underwent transient shape change distinct from that induced by formyl-Met-Leu-Phe (fMLP). fMLP stimulated beta 2-integrin up-regulation and 70% loss of L-selectin, whereas only low-level up-regulation of the beta 2-integrins, without loss of L-selectin, occurred with anti-CEA Ig. Anti-CEA F(ab')2 fragments and whole Ig augmented beta 2-integrin-dependent adhesion. Anti-CEA Ig-induced beta 2-integrin activation was transient, whereas fMLP-induced activation persisted longer. Although they did not cause a significant increase in respiratory burst activity, CEA Ig and F(ab')2 fragments of antibody primed neutrophils so that the subsequent fMLP-induced respiratory burst was significantly increased.

Citations

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