肝脏DNA甲基化模式的性别差异和小鼠的表观遗传衰老
Shant Apelian1, Ramanaiah Mamillapalli1, Abdullah Ucar1
1Department of Obstetrics, Gynecology and Reproductive Sciences, Yale School of Medicine, New Haven, CT 06510, USA.
American journal of physiology. Gastrointestinal and liver physiology
|February 16, 2026
概括
老年雄性和雌性小鼠显示出不同的肝脏DNA甲基化模式,但在表观遗传衰老方面没有差异. 性别特异性的表观遗传变化可能在以后的生活中出现,影响肝功能.
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.
- 衰老研究研究 衰老研究
背景情况:
- 生物性别影响衰老,疾病易感性和寿命.
- DNA甲基化模式作为生物衰老的定量标记.
- 研究表观遗传衰老中的性别差异对于理解与年龄相关的健康差异至关重要.
研究的目的:
- 为了确定老年雄性和雌性小鼠是否表现出不同的肝脏DNA甲基化模式.
- 用DNA甲基化数据评估表观遗传衰老中的性别特异性.
- 鉴定特定的基因和CpG位点与老年肝脏的基于性别的甲基化变异相关.
主要方法:
- 在老年C57BL/6小鼠 (6个雄性,11个雌性) 中进行肝脏DNA甲基化分析.
- 使用DNA甲基化预测器估计生物年龄 (DNAge®).
- 在性别之间比较特定位点甲基化,生物衰老加速 (ΔDNAge®) 和主要成分分析 (PCA).
主要成果:
- 在6个基因 (Fam84b,Zswim6,Hsf4,Mn1,Qprt,Rapgefl1) 的12个CpG位点显示出与性别相关的显著甲基化差异.
- Fam84b显示出最一致的与性别相关的效应,男性的甲基化水平更高.
- 在总体生物年龄 (DNAge®) 或年龄加速 (ΔDNAge®) 中没有观察到显著的性别差异.
结论:
- 年龄较大的小鼠表现出特定于性别的肝脏DNA甲基化模式,与年轻小鼠不同.
- 虽然整体表观遗传年龄并没有因性别而异,但性别依赖的表观遗传变化可能会在以后的生活中发生.
- 这些发现表明,与年龄相关的肝功能可能存在性二态,受表观遗传修饰的影响.
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