Admixture mapping in two Mexican samples identifies significant associations of locus ancestry with triglyceride levels in the BUD13/ZNF259/APOA5 region and fine mapping points to rs964184 as the main driver of the association signal

Esteban J Parra, Andrew Mazurek, Christopher R Gignoux, Alexandra Sockell, Michael Agostino, Andrew P Morris, Lauren E Petty, Craig L Hanis, Nancy J Cox, Adan Valladares-Salgado, Jennifer E Below and Miguel Cruz

PLOS ONE, 2017, vol. 12, issue 2, 1-16

Abstract: We carried out an admixture mapping study of lipid traits in two samples from Mexico City. Native American locus ancestry was significantly associated with triglyceride levels in a broad region of chromosome 11 overlapping the BUD13, ZNF259 and APOA5 genes. In our fine-mapping analysis of this region using dense genome-wide data, rs964184 is the only marker included in the 99% credible set of SNPs, providing strong support for rs964184 as the causal variant within this region. The frequency of the allele associated with increased triglyceride concentrations (rs964184-G) is between 30–40% higher in Native American populations from Mexico than in European populations. The evidence currently available for this variant indicates that it may be exerting its effect through three potential mechanisms: 1) modification of enhancer activity, 2) regulation of the expression of several genes in cis and/or trans, or 3) modification of the methylation patterns of the promoter of the APOA5 gene.

Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0172880

DOI: 10.1371/journal.pone.0172880

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