人体表观基因组地图揭示了非正规的DNA甲基化变异
Matthew D Schultz1, Yupeng He1, John W Whitaker2
11] Bioinformatics Program, University of California, San Diego, La Jolla, California 92093, USA [2] Genomic Analysis Laboratory, The Salk Institute for Biological Studies, La Jolla, California 92037, USA.
Nature
|June 2, 2015
概括
这项研究揭示了人类组织中广泛的DNA甲基化模式,突出了细胞因子甲基化 (mCG和mCH) 的特定组织变异. 这些表观遗传差异与组织功能和基因调节有关,为人类健康和疾病提供了洞察力.
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.
- 人体生理学 人体生理学
背景情况:
- 了解人类组织的多样性对于疾病研究至关重要.
- 遗传信息在很大程度上是统一的,需要表观遗传机制来执行特定组织的作用.
- 之前的调查显示,复杂的DNA甲基化场景具有组织特异和不变的模式.
研究的目的:
- 在人类主要器官系统的所有情况下对细胞氨酸甲基化进行目录.
- 整合甲基组与转录组和基因组序列,以获得全面的视图.
- 识别特定于组织的表观遗传机制及其功能影响.
主要方法:
- 人类主要器官系统的高覆盖度甲基组测序.
- 整合甲基组数据与匹配的转录组和基因组序列.
- 在CG (mCG) 和非CG (mCH) 背景下对DNA甲基化进行分析,包括异位基因特异性甲基化和转录.
主要成果:
- 广泛的组织特异性差异性CG甲基化 (mCG) 被确定.
- 观察到部分甲基化域,等位基特异性甲基化和转录.
- 非CG甲基化 (mCH) 在几乎所有人体组织中出乎意料地存在,并且与组织特异性功能相关.
- 在特定组织中,使用mCH数据对在特定组织中逃脱X染色体失活的基因进行了新的预测.
结论:
- 在几种基因组背景下,DNA甲基化在人体组织之间存在很大差异.
- 表观遗传变异,特别是mCH,在组织特异性功能和基因调节中起着重要作用.
- 这本全面的地图集为了解健康和疾病中的组织多样性提供了基础.
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