Blood group alters platelet binding kinetics to von Willebrand factor and consequently platelet function
نویسندگان
چکیده
منابع مشابه
Thrombin decreases von Willebrand factor binding to platelet glycoprotein Ib.
Thrombin is a physiological agonist that promotes platelet aggregation and secretion. In this study we observed that thrombin can also inhibit a function of platelets related to primary hemostasis. Platelet stimulation by thrombin decreased the binding of von Willebrand factor (vWF) to glycoprotein (GP) Ib and decreased ristocetin-induced agglutination, in vitro reactions that correlate with in...
متن کاملHuman platelet surface binding of endogenous secreted factor VIII-von Willebrand factor and platelet factor 4.
Washed human platelets in buffers containing either 2 mM Ca++ or 4 mM EDTA were stimulated by human alpha-thrombin to induce secretion. The binding of two endogenous secreted proteins, factor-VIII-related protein (VIII-R) (von Willebrand factor) and platelet factor 4, was measured by reacting thrombin-treated and control platelets with specific antibodies to these proteins, then quantifying ant...
متن کاملVon Willebrand factor and platelet adhesiveness.
A modification of Salzman's method has been used in an attempt to provide an assay in vitro for the von Willebrand factor. Platelet adhesiveness was increased in von Willebrand's disease by previously coating the beads with normal or haemophilic plasma or cryoprecipitate, whereas von Willebrand plasma had no corrective effect. Antihaemophilic factor (AHF) concentrates were studied in the same w...
متن کاملFibrin Monomer Induces Binding of Endogenous Platelet von Willebrand Factor
This study demonstrates that when platelets are stimulated by thrombin in the presence of low concentrations of purified human fibrinogen (10 to 20 Lg/mL. final concentration) binding of released platelet von Willebrand factor (plt-vWF) to the platelet membrane is enhanced. This effect appears to be mediated by fibrin monomer produced by the action of thrombin on the fibrinogen in the incubatio...
متن کاملRegulation of von Willebrand factor-platelet interactions.
The formation of thrombi is a multistep process involving several components, including von Willebrand factor (VWF). VWF is an adhesive multimeric protein, which acts as a molecular bridge between the subendothelial matrix and the glycoprotein Ib/IX/V receptor complex. Furthermore, VWF promotes the expansion of the platelet plug by cross-linking platelets via binding to integrin alphaIIbbeta3. ...
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ژورنال
عنوان ژورنال: Blood
سال: 2019
ISSN: 0006-4971,1528-0020
DOI: 10.1182/blood-2018-06-855528