title: P-selectin and vascular cell adhesion molecule 1 mediate rolling and arrest, respectively, of CD4+ T lymphocytes on tumor necrosis factor alpha-activated vascular endothelium under flow.
abstract: This report examines the adhesive interactions of human CD4+ T lymphocytes with tumor necrosis factor alpha-activated human endothelial cell monolayers in an in vitro model that mimics microcirculatory flow conditions. Resting CD4+ T cell interactions with activated endothelium consisted of initial attachment followed by rolling, stable arrest, and then spreading and transendothelial migration. P-selectin, but not E-, or L-selectin, mediated most of this initial contact and rolling, whereas beta 1-integrins (alpha 4 beta 1), interacting with endothelial-expressed vascular cell adhesion molecule 1, participated in rolling and mediated stable arrest. In contrast, beta 2-integrins were primarily involved in spreading and transmigration. These findings highlight an important role for P-selectin and suggest discrete functions for beta 1- and beta 2-integrins during lymphocyte recruitment to sites of immune-mediated inflammation.
authors.affiliation: Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts 02115.
authors.forename: F W
authors.initials: FW
authors.lastname: Luscinskas
authors.forename: H
authors.initials: H
authors.lastname: Ding
authors.forename: A H
authors.initials: AH
authors.lastname: Lichtman
mesh_terms: D000818:Animals; D015496:CD4-Positive T-Lymphocytes / Q000502:physiology*; D002448:Cell Adhesion; D015815:Cell Adhesion Molecules / Q000032:analysis / Q000502:physiology*; D002478:Cells, Cultured; D004730:Endothelium, Vascular / Q000166:cytology* / Q000187:drug effects; D006801:Humans; D039041:Integrin alpha4beta1; D016023:Integrins / Q000502:physiology; D018799:Intercellular Adhesion Molecule-1 / Q000032:analysis; D051379:Mice; D019007:P-Selectin; D010980:Platelet Membrane Glycoproteins / Q000032:analysis / Q000502:physiology*; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology*; D019010:Vascular Cell Adhesion Molecule-1
chemical_list: D015815:Cell Adhesion Molecules; D039041:Integrin alpha4beta1; D016023:Integrins; D019007:P-Selectin; D010980:Platelet Membrane Glycoproteins; D014409:Tumor Necrosis Factor-alpha; D019010:Vascular Cell Adhesion Molecule-1; D018799:Intercellular Adhesion Molecule-1