在带血中表征DNA甲基化和基甲基化,并使用Illumina EPIC阵列识别性别特异性差异
Rebekah L Petroff1, Dana C Dolinoy1,2, Vasantha Padmanabhan1,3,4
1Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan, USA.
概括
区分DNA甲基化 (5-mC) 和基甲基化 (5-hmC) 是至关重要的. 这项针对婴儿带血的研究发现,总甲基化中的性别特异性差异显著,但单独对5-mC和5-hmC的甲基化差异较小.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 基因组学就是基因组学.
- 分子生物学分子生物学
背景情况:
- DNA甲基化 (5-mC) 和基甲基化 (5-hmC) 是关键的表观遗传标记.
- 标准的二硫酸盐转化方法无法区分5-mC和5-hmC.
- 鉴于它们独特的生物作用,区分这些标记至关重要.
研究的目的:
- 在婴儿带血中鉴定5-mC和5-hmC.
- 分析这些表观遗传标记的性别特异性.
- 在更大的队列中扩展以前的发现.
主要方法:
- 在73个婴儿带血液样本上利用对联双硫酸盐和氧化双硫酸盐转化.
- 使用Illumina Infinium EPIC阵列评估了5-mC和5-hmC的水平.
- 采用最大概率方法进行数据分析,并进行性别特定的比较.
主要成果:
- 5-mC和5-hmC都显示出广泛的基因组分布,其中5-hmC是普遍存在的 (0.01-0.55比例).
- 在17000个位点 (q<0.05) 的总甲基化中观察到显著的性别特异性差异.
- 对于5-mC (1,866个位点) 和5-hmC (5个位点) 单独发现的性别特异差异较少.
结论:
- 这项研究强调了婴儿带血中5-hmC的普遍性.
- 结果强调了在流行病学研究中区分5-mC和5-hmC的重要性.
- 证实了需要先进的技术来准确评估不同的细胞因子修饰.
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