Title
Laboratory diagnosis and molecular basis of mild von Willebrand disease type 1 Laboratory diagnosis and molecular basis of mild von Willebrand disease type 1
Author
Faculty/Department
Faculty of Medicine and Health Sciences
Publication type
article
Publication
Basel ,
Subject
Human medicine
Source (journal)
Acta haematologica. - Basel
Volume/pages
121(2009) :2/3 , p. 85-97
ISSN
0001-5792
ISI
000267016600002
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Mild type 1 von Willebrand disease (VWD) is characterized by low to variable penetrance of bleeding, a high (increased) prevalence of blood group O, von Willebrand factor (VWF) values around and above 30% with normal ratios of VWF:ristocetin cofactor activity (RCo)/VWF:antigen (Ag), VWF:collagen binding (CB)/VWF:Ag and factor VIII (FVIII):coagulant activity (C)/VWF:Ag. Within this group of patients, the combination of the C1584 mutation and blood group O is rather frequent. Patients with mild VWD type 1 present good/normal responses of FVIII:C and VWF parameters to desmopressin (DDAVP). With the exclusion of dominant VWD type Vicenza, type 1/2E, recessive 2N and dominant 2M, missense mutations in patients with mild VWD type 1 with normal multimers are mainly located in the regulatory sequence region, the D1/D2 propeptide region, the D' VWF-FVIII binding site region and the D4, B1-B3 and C1-C2 domains but rarely in the D3, A1 or A2 domain. A new category of either dominant or recessive mild VWD type 1 due to mutations in the D4, B1-B3 and C1-C2 domains of the VWF gene consists of two groups: one group with mild VWD with normal VWF multimers and a second group with mild/moderate VWD with smeary multimer pattern.
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