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Next-Generation Sequencing of 17 Genes Associated with Venous Thromboembolism Reveals a Deficit of Non-Synonymous Variants in Procoagulant Genes.

Authors
  • Manderstedt, Eric1
  • Lind-Halldén, Christina1
  • Svensson, Peter2
  • Zöller, Bengt3
  • Halldén, Christer1
  • 1 Department of Environmental Science and Bioscience, Kristianstad University, Kristianstad, Sweden. , (Sweden)
  • 2 Department of Coagulation Disorders, Skåne University Hospital, Lund University, Lund, Sweden. , (Sweden)
  • 3 Centre for Primary Health Care Research, Department of Clinical Sciences, Skåne University Hospital, Lund University, Malmö, Sweden. , (Sweden)
Type
Published Article
Journal
Thrombosis and Haemostasis
Publisher
Georg Thieme Verlag KG
Publication Date
Sep 01, 2019
Volume
119
Issue
9
Pages
1441–1450
Identifiers
DOI: 10.1055/s-0039-1693130
PMID: 31352677
Source
Medline
Language
English
License
Unknown

Abstract

The heritability of venous thromboembolism (VTE) is only partially explained by variants in 17 previously VTE-associated genes. This article screens for additional rare variants in the 17 genes and investigates the relative contributions of pro- and anticoagulant genes to VTE. Ninety-six VTE patients from the population-based Malmö Thrombophilia Study were analysed using an AmpliSeq strategy and Ion Torrent sequencing and the variant data were compared with data from public databases. A total of 102 non-synonymous and 76 synonymous variants were identified. Forty-six non-synonymous variants were present in the human gene mutation database. Anticoagulant and procoagulant genes showed 14 and 22 rare non-synonymous variants, respectively. Individual patients showed varying numbers of risk factors; 13 patients had non-synonymous mutations in SERPINC1, PROC and PROS1 genes and 42 had factor V Leiden or prothrombin mutations generating a total of 47 patients with at least one of these risk factors. Ten common VTE-associated variants showed low level enrichments and no correlation to the other risk factors. The enrichment of previously identified risk factors was similar to previous studies. Determination of the nsyn/syn ratio (number of non-synonymous variants per non-synonymous site, nsyn, to the number of synonymous variants per synonymous site, syn) showed, as expected in patients, an increase of non-synonymous relative to synonymous anticoagulant variants compared with controls (nsyn/syn, 0.95 vs. 0.68). In contrast, non-synonymous procoagulant variants (nsyn/syn, 0.31 vs. 0.63) showed a decrease. We suggest that the deficit of non-synonymous variants in procoagulant genes is a novel mechanism contributing to VTE. Georg Thieme Verlag KG Stuttgart · New York.

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