title: [The platelet membrane: some aspects of the pathophysiology of haemostasis].
abstract: Platelet membranes play a key role in all stages of the haemostatic mechanism. Four of these in particular are considered here: adhesion to subendothelium, which involves an interaction between the glycoprotein I complex in the platelet membrane (deficient in the Bernard-Soulier syndrome) and plasma factor VIII; aggregation, involving the membrane glycoprotein IIb/IIIa complex (deficient in thrombasthenia), plasma fibrinogen and divalent cations; platelet factor 3 availability, a function of surface membrane phospholipids; and thromboxane synthesis, a function of the phospholipids of the membrane of the dense tubular system. The glycoprotein I complex also carries binding sites for thrombin and for drug-dependent antibodies, and glycoprotein IIb/IIIa is the site of the P1A1 antigen and of alpha-actinin.
mesh_terms: D001791:Blood Platelet Disorders / Q000503:physiopathology; D001792:Blood Platelets / Q000166:cytology* / Q000503:physiopathology; D002448:Cell Adhesion; D002462:Cell Membrane / Q000503:physiopathology; D003238:Connective Tissue / Q000503:physiopathology; D006487:Hemostasis; D006801:Humans; D010974:Platelet Aggregation; D010977:Platelet Factor 3; D011449:Prostaglandin Endoperoxides / Q000096:biosynthesis; D013928:Thromboxane A2 / Q000096:biosynthesis; D014842:von Willebrand Diseases / Q000503:physiopathology
chemical_list: D011449:Prostaglandin Endoperoxides; D010977:Platelet Factor 3; D013928:Thromboxane A2