title: Cell-cell interactions: leukocyte-endothelial interactions.
abstract: Interactions of leukocytes with endothelial cells are early events in acute and chronic inflammation, immune surveillance of tissues, and wound defense and repair. In contrast with their requisite roles in host defense, dysregulated leukocyte-endothelial interactions mediate inflammatory tissue injury, thrombosis, and other pathologic sequelae. Recent observations also identify dysregulated leukocyte-endothelial interactions in neoplasia and sickle cell vasculopathy. Leukocyte interactions with inflamed endothelial cells are mediated by selectins, signaling molecules that include lipids and chemokines, integrins and their ligands, and junctional molecules. They provide multiple checkpoints for regulation in physiologic inflammation and hemostasis and for dysregulation in pathologic syndromes. Neutrophil-endothelial encounters illustrate a multistep paradigm for inflammatory cell-cell interactions and provide the basis for multiple variations on the central themes.
authors.affiliation: Huntsman Cancer Institute, Program in Human Molecular Biology and Genetics and Departments of Internal Medicine and Pathology, University of Utah School of Medicine, Salt Lake City, Utah 84112, USA.
authors.forename: Thomas M
authors.initials: TM
authors.lastname: McIntyre
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Prescott
authors.forename: Andrew S
authors.initials: AS
authors.lastname: Weyrich
authors.forename: Guy A
authors.initials: GA
authors.lastname: Zimmerman
mesh_terms: D000818:Animals; D002448:Cell Adhesion; D002450:Cell Communication / Q000502:physiology*; D002465:Cell Movement; D004730:Endothelium, Vascular / Q000502:physiology*; D006801:Humans; D007249:Inflammation / Q000473:pathology; D007962:Leukocytes / Q000502:physiology*; D015398:Signal Transduction