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NCOA2核心启动子甲基化分析及其与肾周和皮下脂肪组织差异表达的关系

DOI: 10.7685/j.issn.1000-2030.2014.04.019, PP. 131-136

Keywords: NCOA2基因,肾周脂肪,皮下脂肪,核心启动子,甲基化

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Abstract:

为探讨核受体辅激活蛋白2(NCOA2)基因启动子区甲基化水平与其在肾周脂肪组织及皮下脂肪组织中差异表达的相关性,采用实时荧光定量PCR(qRT-PCR)方法检测NCOA2基因在肾周脂肪组织和皮下脂肪组织中的表达水平;通过构建系列NCOA2基因5’侧翼区缺失表达载体,并采用双荧光素酶报告系统鉴定NCOA2基因核心启动子区;在分析核心启动子区CpG岛的基础上,采用亚硫酸氢盐测序(BSP)法测定NCOA2基因核心启动子区CpG岛甲基化水平。结果表明肾周脂肪组织中NCOA2基因的mRNA表达水平显著低于皮下脂肪组织;NCOA2基因核心启动子区位于-483~-179bp;预测发现该区域存在1个CpG岛,BSP法表明该区域内的25个CpG位点在皮下和肾周脂肪组织均为非甲基化状态,无明显组织差异性。结论肾周脂肪组织和皮下脂肪组织中NCOA2基因表达存在显著差异,而核心启动子区甲基化状态没有参与差异调控。

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