对DNA甲基化的遗传影响有助于阐明调节性基因组过程
Sergio Villicaña1, Juan Castillo-Fernandez2, Eilis Hannon3
1Department of Twin Research and Genetic Epidemiology, King's College London, London, UK. sergio.villicana_munoz@kcl.ac.uk.
Genome biology
|July 31, 2023
概括
遗传变异影响DNA甲基化模式,影响基因调节和疾病风险. 这项研究确定了许多甲基化定量特征位点 (meQTL) 以及它们与人类特征和疾病的联系.
科学领域:
- 基因组学就是基因组学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 人类遗传学 人类遗传学
背景情况:
- 了解对DNA甲基化的遗传影响对于阐明基因调节和疾病病因学至关重要.
- 遗传变异在调节DNA甲基化模式方面发挥着重要作用.
研究的目的:
- 使用Illumina Infinium MethylationEPIC阵列进行全面的甲基化定量特征位点 (meQTL) 分析.
- 研究DNA甲基化对遗传影响与包括疾病在内的各种人类特征之间的重叠.
主要方法:
- 使用Illumina Infinium MethylationEPIC阵列对来自英国三个队列的2358个血液样本的DNA甲基化数据进行分析.
- 在724,499个CpG站点进行了遗传性和meQTL分析.
- 在meQTLs和56个人类特征之间进行了共同定位分析,并与表达量化特征位点 (eQTLs) 进行了丰富分析.
主要成果:
- 确定单核酸多态 (SNPs) 影响34.2%的CPG位点的甲基化水平,其中98%是cis作用的.
- 发现了meQTLs和34个人类表型之间的1520个共同定位,包括与与总胆固醇和炎症性肠病相关的基因的关联.
- 揭示了cis-和trans-meQTLs的机制,例如转录因子结合部位的破坏和远端DNA甲基化调节.
结论:
- 这些发现增强了对DNA甲基化变异机制的理解.
- 结果为对功能性研究的全基因组关联研究 (GWAS) 变体的优先考虑提供了有价值的信息.
- 在线公开提供MeQTL EPIC数据的数据库和查看器.
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