Protein S as Cofactor for TFPI
نویسندگان
چکیده
منابع مشابه
Protein S as cofactor for TFPI.
In the last decades evidence was obtained that protein S not only acts as cofactor of activated protein C (APC) in the downregulation of coagulation, but also expresses anticoagulant activity in the absence of APC. The search for the mechanism(s) underlying the APC-independent anticoagulant activity of protein S was hampered by the fact that protein S exhibited 2 seemingly identical anticoagula...
متن کاملTFPI cofactor function of protein S: essential role of the protein S SHBG-like domain.
Protein S is a cofactor for tissue factor pathway inhibitor (TFPI), accelerating the inhibition of activated factor X (FXa). TFPI Kunitz domain 3 residue Glu226 is essential for enhancement of TFPI by protein S. To investigate the complementary functional interaction site on protein S, we screened 44 protein S point, composite or domain swap variants spanning the whole protein S molecule for th...
متن کاملCleaved protein S (PS), total PS, free PS, and activated protein C cofactor activity as risk factors for venous thromboembolism.
BACKGROUND Although hereditary protein S (PS) deficiency is clearly associated with venous thromboembolism (VTE), the importance of low PS concentrations as a risk factor for VTE in other patients is still a matter of debate. To clarify this issue, we designed a case-control study to evaluate the role of different molecular forms of plasma PS. METHODS We quantified plasma cleaved, total, and ...
متن کاملProtein S as an in vivo cofactor to activated protein C in prevention of microarterial thrombosis in rabbits.
The antithrombotic effects of bovine activated protein C (APC) and protein S were investigated in a rabbit model of microarterial thrombosis. Because of the species specificity of the APC-protein S interaction, bovine APC expresses potent anticoagulant activity in rabbit plasma only when bovine protein S is also present. This provided a way to assess the contribution of bovine protein S to the ...
متن کاملEnhancement of rabbit protein S anticoagulant cofactor activity in vivo by modulation of the protein S C4B binding protein interaction.
The carboxy-terminal region of protein S has been recently been observed to be involved in the interaction between protein S and C4b-binding protein (Walker, F. J. 1989. J. Biol. Chem. 264:17645-17658). A synthetic peptide, GVQLDLDEAI, corresponding to that region of protein S has been used to investigate the protein S/C4b-binding protein interaction in vitro and in vivo. Rabbit activated prote...
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ژورنال
عنوان ژورنال: Arteriosclerosis, Thrombosis, and Vascular Biology
سال: 2009
ISSN: 1079-5642,1524-4636
DOI: 10.1161/atvbaha.108.177436