Fibrinogen binding to ICAM-1 on EA.hy 926 endothelial cells is dependent on an intact cytoskeleton.
Thromb Haemost
; 75(1): 182-9, 1996 Jan.
Article
en En
| MEDLINE
| ID: mdl-8713799
ABSTRACT
Fibrinogen is a ligand for Intercellular Adhesion Molecule-1 (ICAM-1), and enhances monocyte-endothelial cell interaction by coupling Mac-1 on monocytes to ICAM-1 on endothelial cells. We investigated the role of the cytoskeleton in fibrinogen binding to the human endothelial cell line EA.hy 926 using immunofluorescence techniques. In this cell line TNF alpha induced the simultaneous appearance of stress fibers and of ICAM-1, which was clustered predominantly on endothelial cell projections. Incubation of TNF alpha-stimulated endothelial cells with fibrinogen resulted in binding of fibrinogen to ICAM-1 on these cell projections. Disruption of the cytoskeleton by cytocholasin B abolished fibrinogen binding. Activation of protein kinase C with 12-O-tetradecanoyl phorbol-13-acetate resulted in simultaneous loss of both stress fibers and fibrinogen binding. These results suggest that a connection between ICAM-1 and the cytoskeleton results in clustering of ICAM-1 on cell projections, which is required for fibrinogen binding.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Citoesqueleto
/
Fibrinógeno
/
Endotelio Vascular
/
Molécula 1 de Adhesión Intercelular
Límite:
Humans
Idioma:
En
Revista:
Thromb Haemost
Año:
1996
Tipo del documento:
Article
País de afiliación:
Países Bajos