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Updated: Oct 2, 2026

Investigating von Willebrand Factor Pathophysiology Using a Flow Chamber Model of von Willebrand Factor-platelet String Formation
08:30

Investigating von Willebrand Factor Pathophysiology Using a Flow Chamber Model of von Willebrand Factor-platelet String Formation

Published on: August 14, 2017

The factor VIII/von Willebrand factor ratio discriminates between reduced synthesis and increased clearance of von

Jeroen C J Eikenboom1, Giancarlo Castaman, Pieter W Kamphuisen

  • 1Department of Hematology, Hemostasis and Thrombosis Research Center, Leiden University Medical Center, The Netherlands. H.C.J.Eikenboom@LUMC.nl

Thrombosis and Haemostasis
|February 28, 2002
PubMed

It is often stated that a decrease in Von Willebrand factor (VWF), the carrier protein of factor VIII, results in a concordant change in factor VIII. Clinical data suggest that this is not always the case and we hypothesized that the ratio between factor VIII and VWF depends on the genetic defect that causes the VWF deficiency. We have analyzed the ratio between plasma factor VIII and VWF in several subtypes of Von Willebrand Disease and we show that the ratio is increased when VWF synthesis is reduced, but that the ratio remains one when VWF clearance is increased. These observations could be of clinical importance as an increased factor VIII/VWF ratio in combination with a borderline VWF level may indicate the presence of a true genetic defect, possibly a VWF null allele.

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