%0 Journal Article %J Blood %D 2019 %T A genome-wide association study identifies new loci for factor VII and implicates factor VII in ischemic stroke etiology. %A de Vries, Paul S %A Sabater-Lleal, Maria %A Huffman, Jennifer E %A Marten, Jonathan %A Song, Ci %A Pankratz, Nathan %A Bartz, Traci M %A de Haan, Hugoline G %A Delgado, Graciela E %A Eicher, John D %A Martinez-Perez, Angel %A Ward-Caviness, Cavin K %A Brody, Jennifer A %A Chen, Ming-Huei %A de Maat, Moniek P M %A Frånberg, Mattias %A Gill, Dipender %A Kleber, Marcus E %A Rivadeneira, Fernando %A Soria, José Manuel %A Tang, Weihong %A Tofler, Geoffrey H %A Uitterlinden, André G %A van Hylckama Vlieg, Astrid %A Seshadri, Sudha %A Eric Boerwinkle %A Davies, Neil M %A Giese, Anne-Katrin %A Ikram, M Kamran %A Kittner, Steven J %A McKnight, Barbara %A Psaty, Bruce M %A Reiner, Alex P %A Sargurupremraj, Muralidharan %A Taylor, Kent D %A Fornage, Myriam %A Hamsten, Anders %A Marz, Winfried %A Rosendaal, Frits R %A Souto, Juan Carlos %A Dehghan, Abbas %A Johnson, Andrew D %A Morrison, Alanna C %A O'Donnell, Christopher J %A Smith, Nicholas L %K Brain Ischemia %K Co-Repressor Proteins %K Cohort Studies %K Coronary Artery Disease %K DNA-Binding Proteins %K Factor VII %K Female %K Follow-Up Studies %K Genetic Loci %K Genetic Predisposition to Disease %K Genome-Wide Association Study %K Humans %K Male %K Membrane Transport Proteins %K Mendelian Randomization Analysis %K Middle Aged %K Neoplasm Proteins %K Phenotype %K Polymorphism, Single Nucleotide %K Prognosis %K Stroke %K Venous Thromboembolism %X

Factor VII (FVII) is an important component of the coagulation cascade. Few genetic loci regulating FVII activity and/or levels have been discovered to date. We conducted a meta-analysis of 9 genome-wide association studies of plasma FVII levels (7 FVII activity and 2 FVII antigen) among 27 495 participants of European and African ancestry. Each study performed ancestry-specific association analyses. Inverse variance weighted meta-analysis was performed within each ancestry group and then combined for a -ancestry meta-analysis. Our primary analysis included the 7 studies that measured FVII activity, and a secondary analysis included all 9 studies. We provided functional genomic validation for newly identified significant loci by silencing candidate genes in a human liver cell line (HuH7) using small-interfering RNA and then measuring messenger RNA and FVII protein expression. Lastly, we used meta-analysis results to perform Mendelian randomization analysis to estimate the causal effect of FVII activity on coronary artery disease, ischemic stroke (IS), and venous thromboembolism. We identified 2 novel ( and ) and 6 known loci associated with FVII activity, explaining 19.0% of the phenotypic variance. Adding FVII antigen data to the meta-analysis did not result in the discovery of further loci. Silencing in HuH7 cells upregulated FVII, whereas silencing downregulated FVII. Mendelian randomization analyses suggest that FVII activity has a positive causal effect on the risk of IS. Variants at and contribute to FVII activity by regulating expression levels. FVII activity appears to contribute to the etiology of IS in the general population.

%B Blood %V 133 %P 967-977 %8 2019 Feb 28 %G eng %N 9 %1 https://www.ncbi.nlm.nih.gov/pubmed/30642921?dopt=Abstract %R 10.1182/blood-2018-05-849240 %0 Journal Article %J Circulation %D 2019 %T Genome-Wide Association Transethnic Meta-Analyses Identifies Novel Associations Regulating Coagulation Factor VIII and von Willebrand Factor Plasma Levels. %A Sabater-Lleal, Maria %A Huffman, Jennifer E %A de Vries, Paul S %A Marten, Jonathan %A Mastrangelo, Michael A %A Song, Ci %A Pankratz, Nathan %A Ward-Caviness, Cavin K %A Yanek, Lisa R %A Trompet, Stella %A Delgado, Graciela E %A Guo, Xiuqing %A Bartz, Traci M %A Martinez-Perez, Angel %A Germain, Marine %A de Haan, Hugoline G %A Ozel, Ayse B %A Polasek, Ozren %A Smith, Albert V %A Eicher, John D %A Reiner, Alex P %A Tang, Weihong %A Davies, Neil M %A Stott, David J %A Rotter, Jerome I %A Tofler, Geoffrey H %A Eric Boerwinkle %A de Maat, Moniek P M %A Kleber, Marcus E %A Welsh, Paul %A Brody, Jennifer A %A Chen, Ming-Huei %A Vaidya, Dhananjay %A Soria, José Manuel %A Suchon, Pierre %A van Hylckama Vlieg, Astrid %A Desch, Karl C %A Kolcic, Ivana %A Joshi, Peter K %A Launer, Lenore J %A Harris, Tamara B %A Campbell, Harry %A Rudan, Igor %A Becker, Diane M %A Li, Jun Z %A Rivadeneira, Fernando %A Uitterlinden, André G %A Hofman, Albert %A Franco, Oscar H %A Cushman, Mary %A Psaty, Bruce M %A Morange, Pierre-Emmanuel %A McKnight, Barbara %A Chong, Michael R %A Fernandez-Cadenas, Israel %A Rosand, Jonathan %A Lindgren, Arne %A Gudnason, Vilmundur %A Wilson, James F %A Hayward, Caroline %A Ginsburg, David %A Fornage, Myriam %A Rosendaal, Frits R %A Souto, Juan Carlos %A Becker, Lewis C %A Jenny, Nancy S %A Marz, Winfried %A Jukema, J Wouter %A Dehghan, Abbas %A Trégouët, David-Alexandre %A Morrison, Alanna C %A Johnson, Andrew D %A O'Donnell, Christopher J %A Strachan, David P %A Lowenstein, Charles J %A Smith, Nicholas L %K Arterial Occlusive Diseases %K Biomarkers %K Blood Coagulation %K Blood Coagulation Disorders, Inherited %K Factor VIII %K Genetic Loci %K Genetic Markers %K Genetic Predisposition to Disease %K Genome-Wide Association Study %K Humans %K Mendelian Randomization Analysis %K Phenotype %K Ribosomal Protein L3 %K Risk Factors %K Venous Thrombosis %K von Willebrand Factor %X

BACKGROUND: Factor VIII (FVIII) and its carrier protein von Willebrand factor (VWF) are associated with risk of arterial and venous thrombosis and with hemorrhagic disorders. We aimed to identify and functionally test novel genetic associations regulating plasma FVIII and VWF.

METHODS: We meta-analyzed genome-wide association results from 46 354 individuals of European, African, East Asian, and Hispanic ancestry. All studies performed linear regression analysis using an additive genetic model and associated ≈35 million imputed variants with natural log-transformed phenotype levels. In vitro gene silencing in cultured endothelial cells was performed for candidate genes to provide additional evidence on association and function. Two-sample Mendelian randomization analyses were applied to test the causal role of FVIII and VWF plasma levels on the risk of arterial and venous thrombotic events.

RESULTS: We identified 13 novel genome-wide significant ( P≤2.5×10) associations, 7 with FVIII levels ( FCHO2/TMEM171/TNPO1, HLA, SOX17/RP1, LINC00583/NFIB, RAB5C-KAT2A, RPL3/TAB1/SYNGR1, and ARSA) and 11 with VWF levels ( PDHB/PXK/KCTD6, SLC39A8, FCHO2/TMEM171/TNPO1, HLA, GIMAP7/GIMAP4, OR13C5/NIPSNAP, DAB2IP, C2CD4B, RAB5C-KAT2A, TAB1/SYNGR1, and ARSA), beyond 10 previously reported associations with these phenotypes. Functional validation provided further evidence of association for all loci on VWF except ARSA and DAB2IP. Mendelian randomization suggested causal effects of plasma FVIII activity levels on venous thrombosis and coronary artery disease risk and plasma VWF levels on ischemic stroke risk.

CONCLUSIONS: The meta-analysis identified 13 novel genetic loci regulating FVIII and VWF plasma levels, 10 of which we validated functionally. We provide some evidence for a causal role of these proteins in thrombotic events.

%B Circulation %V 139 %P 620-635 %8 2019 Jan 29 %G eng %N 5 %1 https://www.ncbi.nlm.nih.gov/pubmed/30586737?dopt=Abstract %R 10.1161/CIRCULATIONAHA.118.034532