Type IIB von Willebrand disease: a paradox explains how von Willebrand factor works
نویسندگان
چکیده
منابع مشابه
von Willebrand factor binds to platelets and induces aggregation in platelet-type but not type IIB von Willebrand disease.
Platelet-type von Willebrand disease (vWD) and pseudo-vWD are two recently described intrinsic platelet defects characterized by enhanced ristocetin-induced agglutination in platelet-rich plasma. A similar finding is also typical of type IIB vWD, where it has been related to a von Willebrand factor (vWF) rather than a platelet abnormality. Platelet aggregation induced by unmodified human vWF in...
متن کاملCosegregation of von Willebrand factor gene polymorphisms and possible germinal mosaicism in type IIB von Willebrand disease.
Recent reports of the mutations resulting in von Willebrand disease (vWD) have indicated that some cases of type IIA vWD are caused by single nucleotide substitutions in the gene encoding von Willebrand factor (vWF). However, the molecular pathogenesis of type IIB vWD remains unresolved and, with the complex posttranslational processing required for fully functional vWF, the mutations responsib...
متن کاملType IIB von Willebrand's disease: differential clearance of endogenous versus transfused large multimer von willebrand factor.
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 کاملReduced von Willebrand factor survival in type Vicenza von Willebrand disease.
Type Vicenza variant of von Willebrand disease (VWD) is characterized by a low plasma von Willebrand factor (VWF) level and supranormal VWF multimers. Two candidate mutations, G2470A and G3864A at exons 17 and 27, respectively, of the VWF gene were recently reported to be present in this disorder. Four additional families, originating from northeast Italy, with both mutations of type Vicenza VW...
متن کاملUnique interactions of asialo von Willebrand factor with platelets in platelet-type von Willebrand disease.
The present studies demonstrate that platelets from patients with platelet-type von Willebrand disease show specific and saturable binding of asialo von Willebrand factor (AS-vWF) under conditions where such binding is not observed with normal platelets. Although specific binding of 125I-AS-vWF to formalin-fixed normal platelets could not be demonstrated, specific binding to fixed patient plate...
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ژورنال
عنوان ژورنال: Journal of Thrombosis and Haemostasis
سال: 2004
ISSN: 1538-7933,1538-7836
DOI: 10.1111/j.1538-7836.2003.00523.x