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BS-clock,通过高分辨率的DNA甲基化二硫酸盐测序数据来推进表观遗传年龄预测

Congcong Hu¹, Yunxiao Li^1,2, Longhui Li¹

¹Department of Mathematics, Shanghai Normal University, Shanghai 200234, China.

Bioinformatics (Oxford, England)

|November 5, 2024

概括

我们开发了BS-clock,一种使用二硫酸盐测序数据进行更准确的人类衰老估计的新型DNA甲基化钟. 这种方法提供了全基因组覆盖范围,并比基于阵列的时钟提高了稳定性.

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.
老年学是指老年学的学科.
基因组学就是基因组学.

背景情况:

DNA甲基化模式是生物年龄估计的可靠生物标志物.
现有的甲基化时钟通常依赖于数组数据,这在CpG覆盖和灵敏度方面具有局限性.
双硫酸盐测序为DNA甲基化分析提供了更大的覆盖范围和灵敏度.

研究的目的:

开发一种新的DNA甲基化时钟,BS-clock,利用二硫酸盐测序数据用于人类衰老.
与现有方法相比,提高生物年龄预测的准确性和稳定性.
探索依赖年龄的衰老率和跨组织预测能力.

主要方法:

开发了BS-clock,一种基于二硫酸盐测序 (BS-seq) 数据的DNA甲基化时钟.
利用了来自四种组织类型的529个样本的BS-seq数据.
通过将预测与时间年龄相关联并评估跨组织适用性来评估时钟性能.

主要成果:

与基于阵列的时钟相比,BS时钟在多种组织中与时间年龄有更高的相关性.
在不同的生命阶段和疾病状况中确定了年龄相关的衰老率.
当将一个组织训练的模型应用于其他组织时,观察到有限的预测准确性.

结论:

BS-clock提供了一种更强大,更准确的方法来量化人类的衰老,使用来自二硫酸盐测序的全基因组CpG覆盖.
这一进步有助于对衰老进行更深入的表观遗传研究.
BS-clock有可能开发出促进健康衰老的干预措施.

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