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  • Title: New gene variants associated with venous thrombosis: a replication study in White and Black Americans.
    Author: Austin H, De Staercke C, Lally C, Bezemer ID, Rosendaal FR, Hooper WC.
    Journal: J Thromb Haemost; 2011 Mar; 9(3):489-95. PubMed ID: 21232005.
    Abstract:
    BACKGROUND: We evaluated 10 single-nucleotide polymorphisms (SNPs) identified in three European case-control studies as risk factors for venous thrombosis. OBJECTIVES: We sought to replicate the positive findings from this report among Whites and to evaluate the association of these SNPs with venous thrombosis for the first time among Blacks. PATIENT/METHODS: These SNPs were evaluated in a case-control study of deep vein thrombosis and pulmonary embolism that included 1076 cases and 1239 controls. About 50% of subjects were African Americans. We measured plasma factor (F) XI on a subset of subjects. RESULTS: Among Whites, positive findings for rs13146272 in the CYP4V2 gene, for rs3087505 in the KLKB1 gene and for rs3756008 and rs2036914 in the F11 gene were found. We did not find significant associations for rs2227589 in the SERPINC1 gene and for rs1613662 in the GP6 gene. Among Blacks, rs2036914 in F11 and rs670659 in RGS7 were related to venous thrombosis, but the study had limited statistical power for many SNPs. Among Blacks, plasma FXI was related to two SNPs and the OR relating to the 90th percentile of the control distribution of plasma FXI was 2.6 (95% CI, 1.4, 5.0). CONCLUSIONS: Our study supports the finding that genetic variants in the F11 gene are risk factors for venous thrombosis among both Whites and Blacks, although the findings in Blacks require confirmation. A meta-analysis of five case-control studies indicates that rs2227589 in the SERPINC1 gene, rs13146272 in the CYP4V2 gene and rs1613662 in the GP6 gene are risk factors for venous thrombosis among Whites.
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