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表观遗传年龄模型对下一代甲基化阵列的适用性

Leonardo D Garma¹, Miguel Quintela-Fandino²

¹Breast Cancer Clinical Research Unit, Centro Nacional de Investigaciones Oncológicas-CNIO, Melchor Fernández Almagro, 3, Madrid, 28029, Spain.

Genome medicine

|October 7, 2024

概括

对于EPICv2阵列,需要新的表观遗传时钟,因为旧模型被扭曲. 一个新的,交叉兼容的模型准确地预测了年龄,并显示了最小的变化,但无法检测癌症,辐射或运动导致的年龄加速.

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.
生物技术是生物技术.
计算生物学计算生物学

背景情况:

表观遗传钟使用DNA甲基化估计生物年龄.
像EPICv2这样的新型甲基化阵列可以使较旧的表观遗传时钟模型过时.
这项研究研究了EPICv2阵列对现有的表观遗传钟的影响.

研究的目的:

评估EPICv2阵列上现有的表观遗传钟的性能.
开发一种新的表观遗传年龄预测模型,与多个微阵列平台 (450k,EPICv1,EPICv2) 兼容.
评估模型在应对各种干预措施时检测表观遗传衰老加速的能力.

主要方法:

在EPICv2阵列上测试了四个表观遗传时钟,使用了10,835个样本.
在2,095个样本上开发和验证了一种新的交叉兼容的表观遗传年龄模型.
评估了技术噪音和人体内变化;分析了癌症幸存者,乳腺癌患者和运动干预研究的数据.

主要成果:

现有的表观遗传时钟在EPICv2阵列上显示了显著的年龄预测扭曲 (高达25岁).
新型号实现了高时间年龄预测准确度,与最先进的时钟相提并论.
该模型在技术复制品和重复样本中显示出较低的变化,并重现了癌症和辐射暴露中已知的表观遗传年龄加速模式.

结论:

现有的表观遗传时钟需要更新以确保EPICv2的兼容性.
开发的模型提供了EPICv2兼容性和与旧阵列的交叉兼容性.
描述表观遗传年龄预测变异提供了评估表观遗传年龄变化的指标.
第一代模型没有检测到由于癌症,辐射或运动而导致的显著表观遗传年龄变化.

关键词:

通过DNA甲基化.基因表观时钟是什么?表观遗传学在表观遗传学中,表观遗传学是指表观遗传学.

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