Preclinical evaluation of a semi-automated and rapid commercial electrophoresis assay for von Willebrand factor multimers

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http://hdl.handle.net/10138/304363

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Pikta , M , Zemtsovskaja , G , Bautista , H , Nouadje , G , Szanto , T , Viigimaa , M & Banys , V 2018 , ' Preclinical evaluation of a semi-automated and rapid commercial electrophoresis assay for von Willebrand factor multimers ' , Journal of Clinical Laboratory Analysis , vol. 32 , no. 6 , 22416 . https://doi.org/10.1002/jcla.22416

Title: Preclinical evaluation of a semi-automated and rapid commercial electrophoresis assay for von Willebrand factor multimers
Author: Pikta, Marika; Zemtsovskaja, Galina; Bautista, Hector; Nouadje, Georges; Szanto, Timea; Viigimaa, Margus; Banys, Valdas
Contributor: University of Helsinki, HUSLAB
Date: 2018-07
Language: eng
Number of pages: 9
Belongs to series: Journal of Clinical Laboratory Analysis
ISSN: 0887-8013
URI: http://hdl.handle.net/10138/304363
Abstract: BackgroundThe von Willebrand factor (VWF) multimer test is required to correctly subtype qualitative type 2 von Willebrand disease (VWD). The current VWF multimer assays are difficult, nonstandardized, and time-consuming. The purpose of this study was to evaluate the clinical utility of the commercial VWF multimer kit by Sebia (Lisses, France), an electrophoresis technique yielding same-day results. MethodsTen healthy volunteer plasma samples, in-house reference plasma (IRP) and commercial normal plasma (CNP) samples, 10 plasma samples from patients with a known VWD type, 1 hemophilia A plasma sample, and 7 external quality assurance (EQA) samples were analyzed using the commercial VWF multimer kit. Additional coagulation testing included measurements of VWF antigen (VWF:Ag), VWF activity (VWF:Ac), and FVIII activity (FVIII:C). ResultsThe CNP results revealed a relative loss of the highest molecular weight multimers; therefore, IRP was preferred as the reference sample. The interpretations of 10 patients with a known VWD type could be successfully reproduced and agreed with previous VWF multimer results. In all EQA surveys, the multimer results and final VWD diagnosis agreed with expert opinion. ConclusionsThe VWF multimer assay by Sebia is easy to perform and can be successfully implemented in any clinical laboratory for second-stage evaluation of VWD. The resolution power of multimer distribution is adequate to correctly classify VWD types 1, 2A, 2B, and 3.
Subject: electrophoresis
subtyping
von Willebrand disease
von Willebrand factor
von Willebrand factor multimer
LABORATORY DIAGNOSIS
DISEASE
UPDATE
CLASSIFICATION
IDENTIFICATION
THERAPY
217 Medical engineering
3111 Biomedicine
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