表观遗传钟的生物学与技术可靠性以及对疾病预后和干预反应的影响
bioRxiv : the preprint server for biology
|November 24, 2025
概括
生物可靠性对于DNA甲基化钟或表观遗传钟至关重要,以准确估计生物年龄. 许多钟表表现出不良的生物稳定性,尽管具有良好的技术可重复性,但限制了它们的临床使用. 基于PC的时钟,如PCGrimAge,显示出更好的可靠性.
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.
- 生物标志物发现发现
- 衰老研究研究 衰老研究
背景情况:
- 基于DNA甲基化的表观遗传钟估计生物年龄并预测健康结果.
- 表观遗传时钟的翻译效用取决于预测准确性和可靠性.
- 可靠性包括在技术复制品和重复生物测量中保持一致性.
研究的目的:
- 使用TranslAGE平台全面评估18个表观遗传钟的技术和生物可靠性.
- 评估可靠性如何影响表观遗传时钟的下游应用.
- 根据其可靠性,确定适合临床翻译的表观遗传钟.
主要方法:
- 评估了18个表观遗传时钟,包括时间预测,死亡率预测,衰老速度测量和可解释的时钟.
- 在使用EPIC和450K数组的四个独立数据集中量化技术可靠性.
- 在不同条件下的重复样本中评估生物可靠性 (时间,食,压力,环境,天).
主要成果:
- 几乎所有时钟都显示出出色的技术可重复性,基于PC的时钟 (PCGrimAge, SystemsAge) 始终可靠.
- 生物可靠性明显较低,大多数时钟只表现出适度的稳定性.
- 基于PC的时钟,特别是PCGrimAge,表现出卓越的生物可靠性 (ICC>0.75).
- 技术可重复性并不能预测生物可靠性;坚固的时钟往往是生物不可靠的.
- 更高的可靠性与更稳定的预后关联和一致的干预反应相关.
结论:
- 仅凭技术可靠性对表观遗传钟来说是不够的;生物可靠性是一个关键的限制.
- 由于生物可靠性差,许多DNA甲基化钟的翻译效用有限.
- 优先考虑具有高生物可靠性的下一代钟对于临床翻译至关重要.
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