Neurology:血液DNA甲基化测定的衰老速度与年龄相关性认知障碍和痴呆的关系

2022-08-31 Naomi MedSci原创

DNA甲基化算法越来越多地被用于估计生物衰老。事实证明,第三代基于血液的DNA甲基化老化测量方法对于衡量个体之间衰老速度的差异、认知能力下降的风险以及评估减缓衰老的干预措施都是有价值的。

背景和目标:DNA甲基化算法越来越多地被用于估计生物衰老;然而,这些提出的整体生物衰老测量方法如何与大脑衰老有关尚不清楚。近日,一项发表在Neurology上的研究使用阿尔茨海默病神经成像倡议(ADNI)和弗雷明翰心脏研究(FHS)后代队列的数据来测试基于血液的生物衰老DNA甲基化测量与老年人认知障碍和痴呆症之间的关联。

研究方法:研究人员测试了三代DNA甲基化年龄算法(第一代:Horvath和Hannum时钟;第二代:PhenoAge和Grimage;第三代:DunedinPACE,根据epigenome计算的Dunedin Pace of Aging),对照ADNI中的以下认知障碍指标:临床诊断痴呆症和轻微的认知障碍;AD/ADRD筛查测试的分数(阿尔茨海默氏症评估量表;最低状态检查;蒙特利尔认知评估);以及认知测试的分数(Rey听觉言语学习测试;逻辑记忆测试;跟踪测试)。在FHS后代队列中的一项独立复制中,进一步测试了DNA甲基化算法与患痴呆症风险之间的纵向关联。

结果:

  • 在ADNI(N=649人)中,第一代(Horvath和Hannum DNA甲基化年龄时钟)和第二代(PhenoAge和Grimage)DNA甲基化程度与老年人认知障碍的程度并不一致。
  • 相比之下,生物衰老的第三代衡量标准DunedinPACE与阿尔茨海默病的临床诊断(Beta[95%CI]=0.28[0.08-0.47])以及AD/ADRD筛查测试(Beta[Robust SE]=-0.10[0.04]至0.08[0.04])和认知测试(Beta[Robust SE]=-0.12[0.04]至0.10[0.03])的较差分数有关。
  • 更快的速度之间的关联,在对FHS后代队列(N=2,264人,HR[95%CI]=1.27[1.07-1.49])的纵向分析中,确认了DunedinPACE测量的老龄化速度和发展为痴呆症的风险。

事实证明,第三代基于血液的DNA甲基化老化测量方法对于衡量个体之间衰老速度的差异、认知能力下降的风险以及评估减缓衰老的干预措施都是有价值的。

文献来源:Sugden K, Caspi A, Elliott ML, et al. Association of Pace of Aging Measured by Blood-Based DNA Methylation With Age-Related Cognitive Impairment and Dementia [published online ahead of print, 2022 Jul 6]. Neurology. 2022;10.1212/WNL.0000000000200898. doi:10.1212/WNL.0000000000200898

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    2023-07-22 yinhl1978
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    2023-07-25 丁鹏鹏
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    2022-08-30 neuro.Dr

    老年性痴呆,未来还是希望借助神经电生理吧,也许更为有效!

    0

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