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标题：Identification of candidate genes encoding an LDL-C QTL in baboons
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作者：Genesio M. Karere ; Jeremy P. Glenn ; Shifra Birnbaum 等
期刊名称：JLR Papers In Press
印刷版ISSN：0022-2275
电子版ISSN：1539-7262
出版年度：2013
卷号：54
期号：7
页码：1776-1785
DOI：10.1194/jlr.M032649
语种：English
出版社：American Society for Biochemistry and Molecular Biology
摘要：Cardiovascular disease (CVD) is the leading cause of death in developed countries, and dyslipidemia is a major risk factor for CVD. We previously identified a cluster of quantitative trait loci (QTL) on baboon chromosome 11 for multiple, related quantitative traits for serum LDL-cholesterol (LDL-C). Here we report differentially regulated hepatic genes encoding an LDL-C QTL that influences LDL-C levels in baboons. We performed hepatic whole-genome expression profiling for LDL-C-discordant baboons fed a high-cholesterol, high-fat (HCHF) diet for seven weeks. We detected expression of 117 genes within the QTL 2-LOD support interval. Three genes were differentially expressed in low LDL-C responders and 8 in high LDL-C responders in response to a HCHF diet. Seven genes ( ACVR1B , CALCOCO1 , DGKA , ERBB3 , KRT73 , MYL6B , TENC1 ) showed discordant expression between low and high LDL-C responders. To prioritize candidate genes, we integrated miRNA and mRNA expression profiles using network tools and found that four candidates ( ACVR1B , DGKA , ERBB3 , TENC1 ) were miRNA targets and that the miRNAs were inversely expressed to the target genes. Candidate gene expression was validated using QRT-PCR and Western blotting. This study reveals candidate genes that influence variation in LDL-C in baboons and potential genetic mechanisms for further investigation.
关键词：dyslipidemia ; cardiovascular disease ; diet-responsive liver gene expression ; low density lipoprotein-cholesterol