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Whole-exome sequencing in evaluation of patients with venous thromboembolism

AutorLee, Eun-Ju; Dykas, Daniel J.; Leavitt, Andrew D.; Camire, Rodney M.; Ebberink, Eduard; García de Frutos, Pablo ; Gnanasambandan, Kavitha; Gu, Sean X.; Huntington, James Andrew; Lentz, Steven R.; Mertens, Koen; Parish, Christopher R.; Rezaie, Alireza R.; Sayeski, Peter P.; Cromwell, Caroline; Bar, Noffar; Halene, Stephanie; Neparidze, Natalia; Parker, Terri L.; Burns, Adrienne J.; Dumont, Anne; Yao, Xiaopan; Ochoa Chaar, Cassius Iyad; Connors, Jean M.; Bale, Allen E.; Lee, Alfred Ian
Fecha de publicación11-jul-2017
EditorAmerican Society of Hematology
CitaciónBlood Advances 1(16): 1224-1237 (2017)
ResumenGenetics play a significant role in venous thromboembolism (VTE), yet current clinical laboratory-based testing identifies a known heritable thrombophilia (factor V Leiden, prothrombin gene mutation G20210A, or a deficiency of protein C, protein S, or antithrombin) in only a minority of VTE patients. We hypothesized that a substantial number of VTE patients could have lesser-known thrombophilia mutations. To test this hypothesis, we performed whole-exome sequencing (WES) in 64 patients with VTE, focusing our analysis on a novel 55-gene extended thrombophilia panel that we compiled. Our extended thrombophilia panel identified a probable disease-causing genetic variant or variant of unknown significance in 39 of 64 study patients (60.9%), compared with 6 of 237 control patients without VTE (2.5%) (P < .0001). Clinical laboratory-based thrombophilia testing identified a heritable thrombophilia in only 14 of 54 study patients (25.9%). The majority of WES variants were either associated with thrombosis based on prior reports in the literature or predicted to affect protein structure based on protein modeling performed as part of this study. Variants were found in major thrombophilia genes, various SERPIN genes, and highly conserved areas of other genes with established or potential roles in coagulation or fibrinolysis. Ten patients (15.6%) had >1 variant. Sanger sequencing performed in family members of 4 study patients with and without VTE showed generally concordant results with thrombotic history. WES and extended thrombophilia testing are promising tools for improving our understanding of VTE pathogenesis and identifying inherited thrombophilias.
Versión del editorhttps://doi.org/10.1182/bloodadvances.2017005249
URIhttp://hdl.handle.net/10261/176142
DOI10.1182/bloodadvances.2017005249
E-ISSN2473-9529
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