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Berlin Brandenburg

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    In: Transplantation, 2000, Vol.70(1), pp.236-240
    Description: Interaction of endothelial P-selectin with sialyl Lewis-glycoprotein or P-selectin glycoprotein ligand (PSGL)-1 on leukocytes represents an early step in leukocyte recruitment. Redistribution of P-selectin to the endothelial cell surface occurs rapidly after challenge with several proinflammatory agents, for example, histamine, leucopterins, or lipopolysaccharide. We present evidence that prostaglandin E 2 (PGE 2) is an efficient inductor of surface P-selectin on cultured human umbilical vein endothelial cells (HUVEC). The increase in P-selectin-immunoreactivity coincided with redistribution of cytoplasmic P-selectin-reactive granulae to the endothelial cell surface, as visualized by confocal laser microscopic examination. CD4-T-cell adhesion to PGE 2-stimulated HUVEC was also enhanced by a factor of 4, and blocking mAb directed against the binding site of P-selectin almost completely abrogated this increase in CD4-T-cell adhesion. In summary, our findings show that liberation of PGE 2 is an important inductor of P-selectin surface expression on endothelial cells, resulting in enhanced recruitment of inflammatory cells.
    Keywords: Cd4-Positive T-Lymphocytes -- Physiology ; Dinoprostone -- Pharmacology ; Endothelium, Vascular -- Cytology ; P-Selectin -- Biosynthesis;
    ISSN: 0041-1337
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