The role of β2-glycoprotein I (β2GPI) in the activation of plasminogen

作者: Francisco López-Lira , Luis Rosales-León , Verónica Monroy Martínez , Blanca H. Ruiz Ordaz

DOI: 10.1016/J.BBAPAP.2005.12.020

关键词: AntibodyAntiphospholipid syndromeFibrinThrombomodulinCell biologyGlycoproteinFibrinolysisPlasminChemistryBiochemistryFunction (biology)BiophysicsAnalytical chemistryMolecular biology

摘要: Abstract β2-glycoprotein I (β 2 GPI) is a glycoprotein of unknown physiological function. It the main target antigen for antiphospholipid antibodies in patients with syndrome (APS). β GPI binds high affinity to atherogenic lipoprotein Lp(a) which shares structural homology plasminogen, key molecule fibrinolytic system. Impaired fibrinolysis has been described APS. The present work reports interaction between and Glu-Plasminogen may explain recently proteolytic effect plasmin on GPI. In process activation, we found an increase generation both at fibrin cellular surface level as function concentration added, suggesting important role cofactor trimolecular complex GPI-Plasminogen-tPA. This phenomenon represents novel regulatory step positive feedback mechanism extrinsic antithrombotic regulation. IgG anti-β recognized endothelial inducing its activation ICAM-I decrease expression thrombomodulin favoring pro-thrombotic state vascular endothelium. interference conversion by could generate thrombosis observed

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