系统性炎症的DNA甲基化特征与大脑体积,认知轨迹和长期痴呆风险有关
Shannon M Drouin1, Perry Kuo2, Cassandra Blew1
1Laboratory of Behavioral Neuroscience, National Institute on Aging, Intramural Research Program, Baltimore, Maryland, USA.
Aging cell
|November 22, 2025
概括
炎症的表观遗传标记,特别是对C反应蛋白 (CRP) 的DNA甲基化 (DNAm) 和生长分化因子15 (GDF15),比血测量更有效地预测大脑衰老和痴呆风险.
科学领域:
- 神经科学是一个神经科学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 炎症生物学 炎症生物学
背景情况:
- 反应性C蛋白 (CRP) 和生长分化因子15 (GDF15) 是已确立的与大脑健康相关的炎症标志物.
- 基于等离子体的标记物可能无法完全捕捉慢性炎症暴露,因此需要探索更稳定的措施,如DNA甲基化 (DNAm).
研究的目的:
- 调查DNAm测量CRP和GDF15是否可以作为大脑衰老和神经退行症的强有力的预测指标.
- 为了比较DNAm与血标记器对大脑健康和痴呆风险的预测能力.
主要方法:
- 利用了来自巴尔的摩长度老化研究 (BLSA) 的数据,包括DNAm,血,神经成像和认知数据.
- 采用全蛋白质组分析进行生物特征和潜增长曲线模型,以测量与大脑体积和认知的纵向关联.
- 在评估痴呆风险的两个外部队列中验证了结果.
主要成果:
- DNAm CRP和GDF15表现出蛋白质组签名,表明系统性免疫激活.
- 增加的DNAm CRP和GDF15与大脑体积减少和特定区域加速缩有关.
- 与血CRP相比,DNAmCRP与大脑体积,认知轨迹和痴呆风险的相关性更强.
结论:
- CRP和GDF15的表观遗传特征反映了免疫和炎症通路的激活.
- DNAm测量,特别是DNAmCRP,与加速的大脑缩,认知衰退和长期痴呆风险密切相关.
- 与血标志物相比,DNAm提供了一种更稳定,更具预测性的表观遗传测量,用于测量炎症对大脑衰老的影响.
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