A large-scale exome array analysis of venous thromboembolism

Genet Epidemiol. 2019 Jun;43(4):449-457. doi: 10.1002/gepi.22187. Epub 2019 Jan 19.

Abstract

Although recent Genome-Wide Association Studies have identified novel associations for common variants, there has been no comprehensive exome-wide search for low-frequency variants that affect the risk of venous thromboembolism (VTE). We conducted a meta-analysis of 11 studies comprising 8,332 cases and 16,087 controls of European ancestry and 382 cases and 1,476 controls of African American ancestry genotyped with the Illumina HumanExome BeadChip. We used the seqMeta package in R to conduct single variant and gene-based rare variant tests. In the single variant analysis, we limited our analysis to the 64,794 variants with at least 40 minor alleles across studies (minor allele frequency [MAF] ~0.08%). We confirmed associations with previously identified VTE loci, including ABO, F5, F11, and FGA. After adjusting for multiple testing, we observed no novel significant findings in single variant or gene-based analysis. Given our sample size, we had greater than 80% power to detect minimum odds ratios greater than 1.5 and 1.8 for a single variant with MAF of 0.01 and 0.005, respectively. Larger studies and sequence data may be needed to identify novel low-frequency and rare variants associated with VTE risk.

Keywords: exome; genetic association; venous thromboembolism.

Publication types

  • Meta-Analysis
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • African Americans / genetics
  • Alleles
  • Case-Control Studies
  • Exome / genetics*
  • Female
  • Gene Frequency
  • Genetic Predisposition to Disease
  • Genome-Wide Association Study / methods*
  • Genotype
  • High-Throughput Nucleotide Sequencing* / methods
  • High-Throughput Nucleotide Sequencing* / statistics & numerical data
  • Humans
  • Male
  • Microarray Analysis / methods*
  • Microarray Analysis / statistics & numerical data
  • Odds Ratio
  • Polymorphism, Single Nucleotide
  • Sample Size
  • Venous Thromboembolism / ethnology
  • Venous Thromboembolism / genetics*

Grant support