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Gain-of-Function Lipoprotein Lipase Variant rs13702 Modulates Lipid Traits through Disruption of a MicroRNA-410 Seed Site
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文摘
Genome-wide association studies (GWAS) have identified hundreds of genetic variants that are associated with lipid phenotypes. However, data supporting a functional role for these variants in the context of lipid metabolism are scarce. We investigated the association of the lipoprotein lipase (m>LPLm>) variant rs13702 with plasma lipids and explored its potential for functionality. The rs13702?minor allele had been predicted to disrupt a microRNA (miR) recognition element (MRE) seed site (MRESS) for the human microRNA-410 (miR-410). Furthermore, rs13702 is in linkage disequilibrium (LD) with several SNPs identified by GWAS. We performed a meta-analysis across ten cohorts of participants that showed a statistically significant association of rs13702 with triacylglycerols (TAG) (p = 3.18?¡Á 10?42) and high-density lipoprotein cholesterol (HDL-C) (p = 1.35?¡Á 10?32) with each copy of the minor allele associated with 0.060?mmol/l lower TAG and 0.041?mmol/l higher HDL-C. Our data showed that an m>LPLm> 3¡ä UTR luciferase reporter carrying the rs13702 major T allele was reduced by 40 % in response to a miR-410 mimic. We also evaluated the interaction between intake of dietary fatty acids and rs13702. Meta-analysis demonstrated a significant interaction between rs13702 and dietary polyunsaturated fatty acid (PUFA) with respect to TAG concentrations (p = 0.00153), with the magnitude of the inverse association between dietary PUFA intake and TAG concentration showing ?0.007?mmol/l greater reduction. Our results suggest that rs13702 induces the allele-specific regulation of m>LPLm> by miR-410 in humans. This work provides biological and potential clinical relevance for previously reported GWAS variants associated with plasma lipid phenotypes.

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