儿科DNA甲基化的跨组织特异性与累积的家庭压力有关
Meingold H Chan1,2,3,4, Sarah M Merrill1,2,5, Fizza Fatima2
1Department of Medical Genetics, Faculty of Medicine, University of British Columbia, Vancouver, Canada.
Developmental psychobiology
|October 30, 2025
概括
累积的家庭压力可能在生物学上嵌入到孩子身上.
科学领域:
- 表观遗传学和分子生物学
- 环境健康和毒理学
- 发展心理学和儿科
背景情况:
- 累积家庭压力 (累积FS) 是影响儿童发育和健康的重要环境因素.
- 基因甲基化 (DNAm) 是一个关键的表观遗传机制,有可能调解环境暴露的生物嵌入.
- 了解组织特异性DNAm对累积FS的反应,对于确定可靠的生物标志物至关重要.
研究的目的:
- 调查累积家庭压力与儿童DNA甲基化模式之间的关联.
- 为了比较两种不同的组织类型的全表观基因组DNAm关联:口腔上皮细胞 (BEC) 和外周血液单核细胞 (PBMC).
- 探索母子关系质量在调解这些关联中的作用.
主要方法:
- 对7至13岁儿童的BECs (n=218) 和PBMCs (n=51) 进行了全表观基因组DNA甲基化分析.
- 统计模型考虑了潜在的混因素,包括性别,年龄,预测的细胞类型比例和遗传祖先.
- 研究了累积FS水平和DNAm位点之间的关联,重点是组织特异性和母婴关系的调解.
主要成果:
- 较高的累积家庭压力与PBMC中的七个CpG位点的DNA甲基化有显著的关联,但在BEC中没有.
- 这些DNAm位点主要位于与压力和免疫相关的基因内.
- 有限的跨组织一致性被观察到,关联部分是由负面的母子关系解释的.
结论:
- 周围血液单核细胞DNA甲基化可能作为一种敏感的生物标志物,用于累积家庭压力的生物嵌入.
- 这项研究强调了DNA甲基化反应对累积家庭压力的显著组织特异性.
- 这些发现强调了在调查儿童环境暴露的表观遗传标记时考虑组织类型的重要性.
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