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A systematic evaluation of short tandem repeats in lipid candidate genes: Riding on the SNP-wave.
PLoS ONE 9:e102113 (2014)
Structural genetic variants as short tandem repeats (STRs) are not targeted in SNP-based association studies and thus, their possible association signals are missed. We systematically searched for STRs in gene regions known to contribute to total cholesterol, HDL cholesterol, LDL cholesterol and triglyceride levels in two independent studies (KORA F4, n = 2553 and SAPHIR, n = 1648), resulting in 16 STRs that were finally evaluated. In a combined dataset of both studies, the sum of STR alleles was regressed on each phenotype, adjusted for age and sex. The association analyses were repeated for SNPs in a 200 kb region surrounding the respective STRs in the KORA F4 Study. Three STRs were significantly associated with total cholesterol (within LDLR, the APOA1/C3/A4/A5/BUD13 gene region and ABCG5/8), five with HDL cholesterol (3 within CETP, one in LPL and one inAPOA1/C3/A4/A5/BUD13), three with LDL cholesterol (LDLR, ABCG5/8 and CETP) and two with triglycerides (APOA1/C3/A4/A5/BUD13 and LPL). None of the investigated STRs, however, showed a significant association after adjusting for the lead or adjacent SNPs within that gene region. The evaluated STRs were found to be well tagged by the lead SNP within the respective gene regions. Therefore, the STRs reflect the association signals based on surrounding SNPs. In conclusion, none of the STRs contributed additionally to the SNP-based association signals identified in GWAS on lipid traits.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Schlagwörter
Genome-wide Association; Population-genetics; Gilberts-syndrome; Heart-disease; Shadow Bands; Cetp Gene; Polymorphism; Caucasians; Imputation; Evolution
ISSN (print) / ISBN
1932-6203
Zeitschrift
PLoS ONE
Quellenangaben
Band: 9,
Heft: 7,
Artikelnummer: e102113
Verlag
Public Library of Science (PLoS)
Verlagsort
Lawrence, Kan.
Nichtpatentliteratur
Publikationen
Begutachtungsstatus
Peer reviewed