在肌缩侧面硬化症中剖析表观遗传年龄加速
Polina Merbaum1, Ramona Zwamborn1, Paul Hop1
1Department of Neurology, UMC Utrecht Brain Center, Utrecht University, Utrecht, The Netherlands.
Epigenomics
|September 30, 2025
概括
皮质遗传衰老在肌缩侧面硬化症 (ALS) 总体上没有加速. 然而,患有C9orf72突变的ALS患者表现出更快的生物衰老,突出显示了ALS白细胞计数的重要性.
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.
- 神经退行性疾病 神经退行性疾病
- 衰老研究研究 衰老研究
背景情况:
- 肌缩侧面硬化症 (ALS) 是一种进展性神经退行性疾病.
- 表观遗传衰老,或通过DNA甲基化测量的生物年龄,已被探索为ALS的潜在因素.
- 以前的研究表明,ALS患者的表观遗传衰老加速.
研究的目的:
- 为了研究与健康对照组相比,肌缩侧面硬化症 (ALS) 患者的表观遗传衰老特征.
- 确定潜在的混因素,如白细胞比例在表观遗传衰老估计中的作用.
- 为了检查与没有C9orf72扩张的ALS患者之间的表观遗传衰老的差异.
主要方法:
- 利用了来自5,146名ALS患者和2,156名来自Project MinE的对照组的全血甲基组概况.
- 使用三代表观遗传钟预测生物年龄.
- 通过对照个体的回归模型和专门分析C9orf72-阴性ALS患者估计的年龄加速.
主要成果:
- 白细胞类型的比例被确定为先前在ALS中观察到的加速生物衰老的重要混因素.
- 在对细胞数进行校正后,在ALS患者和对照人群之间没有发现表观遗传衰老速度的显著差异,除了C9orf72重复扩张的患者.
- 表观遗传年龄加速得分与患者的存活率没有相关性.
结论:
- 在ALS患者和对照人群之间,生物衰老的速度没有显著差异,除了携带C9orf72突变的ALS患者外.
- 改变白细胞比例在一般的ALS病理生理学中起着至关重要的作用,而不是加速衰老本身.
- 这些发现强调了在疾病研究中评估表观遗传衰老时需要考虑细胞组成的必要性.
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