Abstract 21122: Contribution of ABCA1 Genetic Variation to Plasma Lipid Levels in Non-Hispanic White Americans
2017
Introduction: Dyslipidemia [i.e., elevated levels of total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), triglycerides (TG); decreased level of high-density lipoprotein cholesterol (HDL-C)] is one of the risk factors for cardiovascular disease (CVD). Genetics play an important role in inter-individual variation of lipid levels. ATP-binding cassette A1 (ABCA1), a membrane transporter, mediates cellular phospholipid and cholesterol efflux. Mutations in ABCA1 gene cause Tangier’s disease (OMIM #205400) presented with HDL-C deficiency, as well as, increased risk for developing CVD. In this study, we aimed to identify both common [minor allele frequency (MAF)≥5%] and uncommon (MAF<5%) variants of ABCA1 associated with inter-individual variation in major lipid traits. Methods: We resequenced 50 exons and exon-intron boundaries of ABCA1 in a selected set of 95 individuals with extreme HDL-C levels (≤10th and ≥90th %tile), and subsequently genotyped selected variants in the entire sample of 623 U...
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