可转移元素5mC血液细胞的甲基化状态预测年龄和疾病
Francesco Morandini1, Jinlong Y Lu1, Cheyenne Rechsteiner1
1Department of Biology, University of Rochester, Rochester, NY, USA.
Nature aging
|November 28, 2024
概括
可转移元素 (TE) 在衰老过程中失去DNA5甲基细胞素 (5mC) 甲基化. 年轻人L1元素在生命晚期表现出快速的5mC损失,与癌症有关,使新的年龄预测器发展成为可能.
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:
- 可转移元素 (TE) 是可引起基因组不稳定的移动DNA序列.
- 表观遗传沉默,特别是DNA5甲基细胞素 (5mC) 甲基化,对于控制TEs至关重要.
- 在衰老过程中观察到TE激活.
研究的目的:
- 为了研究人类血液中TEs的5mC甲基化模式的与年龄相关的变化.
- 探索TE甲基化动态与衰老之间的关系.
- 评估TE甲基化对开发可解释的年龄预测模型的有用性.
主要方法:
- 对已发表的人类血液DNA甲基化阵列数据的分析.
- 专注于特定TE家族的甲基化变化,包括长间隔核元素1 (L1s).
- TE甲基化,染色质可访问性,表达和年龄之间的相关性分析.
主要成果:
- 进化年轻的L1s在衰老过程中表现出最快的5mC损失,这表明活性去压缩.
- 年轻的L1也显示出增强的染色质可访问性,没有显著的表达变化.
- 长端重复逆转移体THE1A和THE1C表现出快速的5mC损失.
- 精确的年龄预测器可以使用5mC甲基化单个TE副本或TE家族来开发.
- 年轻L1s的去甲基化发生在生命的晚期,与癌症有关,与老L1s的逐渐去甲基化不同.
结论:
- 与年龄相关的TEs的表观遗传变化,特别是年轻L1的5mC损失,是显著的,并且发生在生命的晚期.
- 这些TE甲基化动态与衰老和潜在的癌症有关,为细胞损伤提供了洞察力.
- TE甲基化模式为开发新的,可解释的表观遗传年龄预测因素提供了基础.
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