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. 2013 Jul;37(5):512-521.
doi: 10.1002/gepi.21731. Epub 2013 May 5.

A genome-wide association study for venous thromboembolism: the extended cohorts for heart and aging research in genomic epidemiology (CHARGE) consortium

Affiliations

A genome-wide association study for venous thromboembolism: the extended cohorts for heart and aging research in genomic epidemiology (CHARGE) consortium

Weihong Tang et al. Genet Epidemiol. 2013 Jul.

Abstract

Venous thromboembolism (VTE) is a common, heritable disease resulting in high rates of hospitalization and mortality. Yet few associations between VTE and genetic variants, all in the coagulation pathway, have been established. To identify additional genetic determinants of VTE, we conducted a two-stage genome-wide association study (GWAS) among individuals of European ancestry in the extended cohorts for heart and aging research in genomic epidemiology (CHARGE) VTE consortium. The discovery GWAS comprised 1,618 incident VTE cases out of 44,499 participants from six community-based studies. Genotypes for genome-wide single-nucleotide polymorphisms (SNPs) were imputed to approximately 2.5 million SNPs in HapMap and association with VTE assessed using study-design appropriate regression methods. Meta-analysis of these results identified two known loci, in F5 and ABO. Top 1,047 tag SNPs (P ≤ 0.0016) from the discovery GWAS were tested for association in an additional 3,231 cases and 3,536 controls from three case-control studies. In the combined data from these two stages, additional genome-wide significant associations were observed on 4q35 at F11 (top SNP rs4253399, intronic to F11) and on 4q28 at FGG (rs6536024, 9.7 kb from FGG; P < 5.0 × 10(-13) for both). The associations at the FGG locus were not completely explained by previously reported variants. Loci at or near SUSD1 and OTUD7A showed borderline yet novel associations (P < 5.0 × 10(-6) ) and constitute new candidate genes. In conclusion, this large GWAS replicated key genetic associations in F5 and ABO, and confirmed the importance of F11 and FGG loci for VTE. Future studies are warranted to better characterize the associations with F11 and FGG and to replicate the new candidate associations.

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Figures

Figure 1
Figure 1
Manhattan plot showing the genome-wide −log10 p-values against physical position for total incident VTE in CHARGE.
Figure 2
Figure 2
Regional association plot for total incident VTE at the F5 region on chromosome 1 in CHARGE. The horizontal line indicates the genome-wide significance threshold of p=5.0×10−8. The top SNP is shown by blue triangle. The color of the remaining SNPs reflects the r2 with the top SNP based on the HapMap CEU data with the following color scheme: r2≥0.8 – red, 0.5 ≤ r2 < 0.8 - orange, 0.2 ≤ r2 < 0.5 - yellow, and r2 < 0.2 - white. The light blue line represents the recombination rate (the y axis at right side) based on the data from the HapMap CEU population. Gene annotations are shown under the x axis.
Figure 3
Figure 3
Regional association plot for total incident VTE at the ABO region on chromosome 9 in CHARGE.
Figure 4
Figure 4
Regional association plot for total incident VTE at the FGG region on chromosome 4 in CHARGE.
Figure 5
Figure 5
Regional association plot for total incident VTE at the F11 region on chromosome 4 in CHARGE.

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