一个全表观基因组的协会研究,总血清免疫球蛋白E度
Liming Liang1, Saffron A G Willis-Owen2, Catherine Laprise3
1Departments of Epidemiology and Biostatistics, Harvard School of Public Health, Boston, MA 02115.
Nature
|February 25, 2015
概括
这项研究揭示了免疫球蛋白E (IgE) 水平和DNA甲基化模式之间的表观遗传联系,确定了与过敏炎症相关的36个新的遗传位置. 这些发现为喘和花粉热等过敏性疾病提供了新的治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 遗传学 是一个遗传学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 免疫球蛋白E (IgE) 是过敏性炎症的关键媒介,现有的针对其的疗法在过敏性喘和花粉热等疾病中显示出有效性.
- 遗传关联研究尚未确定用于调节IgE的关键新疗法标或途径.
- 表观遗传机制,特别是DNA甲基化,越来越多地被认为在复杂疾病中的作用,但它们对IgE调节的具体贡献仍然在很大程度上未被探索.
研究的目的:
- 调查血清IgE度和DNA甲基化模式在整个基因组之间的表观遗传关联.
- 确定参与IgE调节的新型遗传位置和途径,有可能发现过敏疾病的新治疗点.
- 在独立的队列和与过敏炎症相关的特定细胞类型中验证已识别的表观遗传关联.
主要方法:
- 对95个核血统的外围血液白细胞的DNA进行了全基因组甲基化分析.
- 研究了血清IgE水平与CpG岛屿甲基化之间的表观遗传关联.
- 在额外的家庭队列和来自普通人群的受试者中验证了积极的发现,在孤立的乙酸盐中证实了甲基化差异.
主要成果:
- 在36个位点的IgE水平和低甲基化之间发现了复制的关联,分析错误发现率低于10~-4).
- 与这些位点相关的基因编码已知的乙酸性蛋白产物,脂炎症调解剂,转录因子和线粒体蛋白质.
- 在患有喘和高IgE水平的个人中,在这些位点的乙基化中观察到显著的差异.
- 前三个位点解释了IgE变异的13%,与单核酸多态基因组全基因组关联研究相比,这一贡献显著更高.
结论:
- 这项研究确定了36个与免疫球蛋白E (IgE) 水平表观遗传相关的新型位置,涉及过敏性炎症的新生物学途径.
- 已识别的位点代表了潜在的治疗点和生物标志物,用于分层过敏疾病患者.
- 表观遗传调节,特别是DNA甲基化,在确定IgE水平和过敏疾病表型方面发挥着重要作用,为治疗干预提供了新的途径.
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