Genome-wide association studies identify genetic loci for low von Willebrand factor levels.
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van Loon Janine, Dehghan Abbas, Weihong Tang, Trompet Stella, McArdle Wendy L, Asselbergs Folkert W, Chen Ming-Huei, Lopez Lorna M, Huffman Jennifer E, Leebeek Frank W G, Basu Saonli, Stott David J, Rumley Ann, Gansevoort Ron T, Davies Gail, Wilson James J F, Witteman Jacqueline C M, Cao Xiting, de Craen Anton J M, Bakker Stephan J L, Psaty Bruce M, Starr John M, Hofman Albert, Wouter Jukema J, Deary Ian J, Hayward Caroline, van der Harst Pim, Lowe Gordon D O, Folsom Aaron R, Strachan David P, Smith Nicolas, de Maat Moniek P M, O'Donnell Christopher
Аннотация
Low von Willebrand factor (VWF) levels are associated with bleeding symptoms and are a diagnostic criterion for von Willebrand disease, the most common inherited bleeding disorder. To date, it is unclear which genetic loci are associated with reduced VWF levels. Therefore, we conducted a meta-analysis of genome-wide association studies to identify genetic loci associated with low VWF levels. For this meta-analysis, we included 31 149 participants of European ancestry from 11 community-based studies. From all participants, VWF antigen (VWF:Ag) measurements and genome-wide single-nucleotide polymorphism (SNP) scans were available. Each study conducted analyses using logistic regression of SNPs on dichotomized VWF:Ag measures (lowest 5% for blood group O and non-O) with an additive genetic model adjusted for age and sex. An inverse-variance weighted meta-analysis was performed for VWF:Ag levels. A total of 97 SNPs exceeded the genome-wide significance threshold of 5 × 10(-8) and comprised five loci on four different chromosomes: 6q24 (smallest P-value 5.8 × 10(-10)), 9q34 (2.4 × 10(-64)), 12p13 (5.3 × 10(-22)), 12q23 (1.2 × 10(-8)) and 13q13 (2.6 × 10(-8)). All loci were within or close to genes, including STXBP5 (Syntaxin Binding Protein 5) (6q24), STAB5 (stabilin-5) (12q23), ABO (9q34), VWF (12p13) and UFM1 (ubiquitin-fold modifier 1) (13q13). Of these, UFM1 has not been previously associated with VWF:Ag levels. Four genes that were previously associated with VWF levels (VWF, ABO, STXBP5 and STAB2) were also associated with low VWF levels, and, in addition, we identified a new gene, UFM1, that is associated with low VWF levels. These findings point to novel mechanisms for the occurrence of low VWF levels.