ArticleHaematologica2025
A fully humanized von Willebrand disease type 1 mouse model as unique platform to investigate novel therapeutic options.
Article in Haematologica, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Novel therapies for von Willebrand disease.Blood advances · 2026Review
- Monovalent antibody treatment of von Willebrand disease.Blood advances · 2026Article
- HMB-002: a monovalent antibody that elevates circulating VWF and FVIII levels for treatment of von Willebrand disease.Blood advances · 2026Article
- Historical, current and future treatments for von Willebrand disease.Haematologica · 2026Review
- Gynecologic and obstetric management of girls and women with von Willebrand disease.Haematologica · 2026Review
- Humanized murine models of platelet function.Current opinion in hematology · 2025Review
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Authors and funding
13 authors.
Funding
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Abstract
Patients suffering from von Willebrand disease (VWD) have reduced quality-of-life despite current treatment options. Moreover, innovation in VWD therapeutic strategies has essentially stalled, and available treatments have remained unchanged for decades. Therefore, there is an unmet need to develop new therapeutic strategies for VWD patients, especially for the large portion of those with VWD-type 1. Due to species differences, the available VWD murine models are not suitable for preclinical studies, making it difficult to test new therapeutic approaches in vivo. With this in mind, we generated mice selectively expressing human von Willebrand factor (VWF) and human GPIbα. Because this fully humanized model was found to express low VWF (12%) and factor VIII (FVIII) (40%) levels with normal multimer profile and activity/antigen ratio, we repositioned it as a VWD-type 1 model (hVWD1 mice). In depth characterization of this model confirmed VWD-type 1 features with a decrease in platelet adhesion and thrombus formation in vitro. In vivo, a moderate bleeding phenotype was observed which was corrected upon the administration of recombinant-VWF or upon histamine-induced release of endothelial VWF. In search of new therapeutic options for VWD, we designed a bispecific single-domain antibody that bridges VWF to albumin (KB-V13A12). Remarkably, a single subcutaneous administration of KB-V13A12 coincided with a sustained 2-fold increase in VWF antigen levels for up to ten days and normalized hemostasis in a tail-clip model in hVWD1 mice. Here, we describe the development of our unique humanized mouse model for VWD-type 1 and a promising new therapeutic that corrected hemostasis in these mice.
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