Journal
JOURNAL OF THROMBOSIS AND HAEMOSTASIS
Volume 3, Issue 10, Pages 2185-2192Publisher
BLACKWELL PUBLISHING
DOI: 10.1111/j.1538-7836.2005.01274.x
Keywords
COAT-platelet; fibrinogen; platelet; serotonin; thrombospondin; transglutaminase
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Coated-platelets, formerly known as COAT-platelets, represent a subpopulation of cells observed after dual agonist stimulation of platelets with collagen and thrombin. This class of platelets retains on its surface high levels of several procoagulant proteins, including fibrinogen, von Willebrand factor, fibronectin, factor V and thrombospondin. Coated-platelets also express surface phosphatidylserine and strongly support prothrombinase activity. Retention of alpha-granule proteins on the surface of coated-platelets involves an unexpected derivatization of these proteins with serotonin and an interaction of serotonin-conjugated proteins with serotonin binding sites on fibrinogen and thrombospondin. This review will also detail experimental systems where coated-platelets are generated as a result of other agonist(s). Finally, the putative physiological consequences of coated-platelet formation will be discussed.
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