The Journal of Immunology, Vol 148, Issue 8 2395-2404, Copyright © 1992 by American Association of Immunologists

ARTICLES

E-selectin (endothelial-leukocyte adhesion molecule-1) is not required for the migration of neutrophils across IL-1-stimulated endothelium in vitro

MB Furie, MJ Burns, MC Tancinco, CD Benjamin and RR Lobb
Department of Pathology, School of Medicine, State University of New York, Stony Brook 11794.

Treatment of vascular endothelial cells with inflammatory cytokines stimulates surface expression of E-selectin (previously known as endothelial-leukocyte adhesion molecule-1) and promotes the transendothelial migration of neutrophils. To assess participation of E- selectin in cytokine-mediated neutrophil migration, an in vitro model consisting of monolayers of human umbilical vein endothelial cells (HUVEC) grown on amniotic connective tissue was used. When HUVEC-amnion cultures were stimulated for 4 h with relatively low concentrations of IL-1 (0.1 to 0.15 U/ml), mAb BB11 or H18/7 to E-selectin partially inhibited migration of subsequently added neutrophils. However, when the cultures were stimulated with 15 U/ml of IL-1 for 4 or 24 h, little to no inhibition was observed. mAb to E-selectin also failed to inhibit migration of neutrophils across HUVEC-amnion cultures treated with low doses of IL-1 when the leukocytes were additionally stimulated by the chemoattractant leukotriene B4. In contrast, migration of neutrophils across IL-1-treated HUVEC was profoundly inhibited by mAb to CD11/CD18 leukocytic integrins under all conditions tested. Results of these studies suggest that participation of E-selectin is not essential for migration of neutrophils across cytokine-stimulated HUVEC in vitro; rather, E-selectin can be bypassed in favor of CD11/CD18-dependent mechanisms under appropriate circumstances.

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