Assay of Plasma von Willebrand Factor Multimer-processing Enzyme.
نویسندگان
چکیده
منابع مشابه
Control of Von Willebrand Factor Multimer Size by Thrombospondin-1
Plasma von Willebrand factor (vWF) is a multimeric protein that mediates adhesion of platelets to sites of vascular injury. Only the very large vWF multimers are effective in promoting platelet adhesion in flowing blood. A protein disulfide bond reductase in plasma reduces the average multimer size of vWF secreted by endothelial cells. This activity has been isolated from human endothelial cell...
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Twelve of 19 patients with myeloproliferative disorders showed a decrease of absence of the largest multimers of plasma von Willebrand factor (vWF) that correlated with elevated platelet counts but not with leukocyte counts. This suggested that platelets, rather than leukocytes, may be associated with the pathogenesis of the acquired vWF abnormality seen in these patients. To examine the hypoth...
متن کاملRegulation of plasma von Willebrand factor
Von Willebrand factor (VWF) is a multimeric plasma glycoprotein that plays a central role in the initiation of blood coagulation. Through interactions between its specific functional domains, the vascular wall, coagulation factor VIII, and platelet receptors, VWF maintains hemostasis by binding to platelets and delivering factor VIII to the sites of vascular injury. In the healthy human populat...
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The abnormal multimeric composition of plasma von Willebrand factor in type IIB von Willebrand's disease is transiently corrected after infusion of 1-deamino-[8-D-arginine]-vasopressin. However, the larger multimers released into the circulation disappear more rapidly in these patients than in type I von Willebrand's disease or normals. We demonstrate that the larger multimers of normal von Wil...
متن کاملComparison of two dimensional immunoelectrophoresis and multimer analysis in the study of von Willebrand factor.
To assess the validity of the multimeric analysis of von Willebrand factor (vWf), this technique was compared with two dimensional immunoelectrophoresis using samples of purified vWf obtained by gel filtration and plasma samples from a patient with severe von Willebrands disease who was receiving prophylaxis with cryoprecipitate. It is concluded that except for specialised clinical and research...
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ژورنال
عنوان ژورنال: Japanese Journal of Thrombosis and Hemostasis
سال: 1999
ISSN: 1880-8808,0915-7441
DOI: 10.2491/jjsth.10.278