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Discovery and replication of novel blood pressure genetic loci in the Women's Genome Health Study.

J. Hypertens.2011 Jan;29(1):62-9. doi:10.1097/HJH.0b013e3283406927
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摘要


OBJECTIVES:Genome-wide association meta-analyses have recently identified multiple loci associated with blood pressure. We sought to validate previously identified blood pressure loci by replication in a single large homogeneous population-based cohort and to identify new genome-wide significant loci using both conventional and expression-guided approaches. METHODS:We examined the associations of 18 single-nucleotide polymorphisms (SNPs) with genome-wide significance (P < 5.0 × 10⁻⁸, 'primary'), and 13 suggestive SNPs (5.0 × 10⁻⁸ < P < 5.6 × 10⁻⁵, 'secondary'), all from previously established genome-wide association studies, with self-reported blood pressure in 23 019 women from the Women's Genome Health Study. We then targeted for replication 12 gene expression-associated SNPs (eSNPs) that were also previously associated with blood pressure phenotypes. RESULTS:Using these replication strategies, we found confirmatory evidence for 13/18 primary SNPs, 3/13 secondary SNPs, and 4/12 eSNPs in the Women's Genome Health Study. Meta-analysis combining the Women's Genome Health Study results with prior study results revealed one previously unrecognized blood pressure locus with genome-wide significance: a BLK-GATA4-adjacent region (P = 3.2 × 10⁻⁸). CONCLUSION:In this analysis, conventional and eSNP-guided strategies were complementary and illustrate two ways for extending initial genome-wide association results for discovery of new genes involved in human disease. Using this strategy, we report a newly identified blood pressure locus, BLK-GATA4, that may further understanding of the complex genetic pathways regulating blood pressure.

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