Regular Article
Endothelial cell function and thrombosis

https://doi.org/10.1053/beha.1999.0028Get rights and content

Abstract

The endothelium is pivotal in the control of haemostasis and thrombosis because it is the primary source of many of the major haemostatic regulatory molecules. Healthy endothelial cells, unlike extravascular cells, are anticoagulant and antithrombotic. This is due to the regulated secretion of antiplatelet agents, including prostacyclin and nitric oxide. Following vessel injury, platelet adhesion to exposed matrix requires von Willebrand Factor, another endothelial cell product. Local generation of thrombin causes a series of receptor-mediated endothelial cell functional responses, while the surface of the endothelium is additionally the site for inactivation of thrombin by antithrombin, and its conversion to a coagulation inhibitor by interaction with thrombomodulin. Endothelial cells are also the source of circulating tissue-type plasminogen activator and its inhibitor, and Tissue Factor pathway inhibitor. In disease states, many of these endothelial cell properties are perturbed towards a more procoagulant and prothrombotic phenotype.

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