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Trans-ancestry Fine Mapping and Molecular Assays Identify Regulatory Variants at the ANGPTL8 HDL-C GWAS Locus.

G3 (Bethesda, Md.) | 2017

Recent genome-wide association studies (GWAS) have identified variants associated with high-density lipoprotein cholesterol (HDL-C) located in or near the ANGPTL8 gene. Given the extensive sharing of GWAS loci across populations, we hypothesized that at least one shared variant at this locus affects HDL-C. The HDL-C-associated variants are coincident with expression quantitative trait loci for ANGPTL8 and DOCK6 in subcutaneous adipose tissue; however, only ANGPTL8 expression levels are associated with HDL-C levels. We identified a 400-bp promoter region of ANGPTL8 and enhancer regions within 5 kb that contribute to regulating expression in liver and adipose. To identify variants functionally responsible for the HDL-C association, we performed fine-mapping analyses and selected 13 candidate variants that overlap putative regulatory regions to test for allelic differences in regulatory function. Of these variants, rs12463177-G increased transcriptional activity (1.5-fold, P = 0.004) and showed differential protein binding. Six additional variants (rs17699089, rs200788077, rs56322906, rs3760782, rs737337, and rs3745683) showed evidence of allelic differences in transcriptional activity and/or protein binding. Taken together, these data suggest a regulatory mechanism at the ANGPTL8 HDL-C GWAS locus involving tissue-selective expression and at least one functional variant.

Pubmed ID: 28754724 RIS Download

Research resources used in this publication

None found

Antibodies used in this publication

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Associated grants

  • Agency: NIDDK NIH HHS, United States
    Id: R01 DK093757
  • Agency: NHLBI NIH HHS, United States
    Id: F31 HL127984
  • Agency: Intramural NIH HHS, United States
    Id: ZIA HG000024
  • Agency: NHGRI NIH HHS, United States
    Id: R01 HG006292
  • Agency: NHGRI NIH HHS, United States
    Id: R01 HG006703
  • Agency: NIDDK NIH HHS, United States
    Id: R01 DK072193
  • Agency: NHLBI NIH HHS, United States
    Id: R01 HL129132
  • Agency: NIDDK NIH HHS, United States
    Id: U01 DK062370
  • Agency: NIDDK NIH HHS, United States
    Id: P30 DK020572
  • Agency: NHLBI NIH HHS, United States
    Id: R00 HL121172
  • Agency: NIDDK NIH HHS, United States
    Id: U01 DK105561

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