基于等离子体蛋白质学的大脑衰老特征和事件痴呆风险
Minghao Kou1, Hao Ma1, Xuan Wang1
1Department of Epidemiology, Celia Scott Weatherhead School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA, USA.
GeroScience
|November 12, 2024
概括
一个新的脑特异性蛋白质年龄差距,使用机器学习计算,显著预测痴呆风险. 更大的差距表明所有原因痴呆症,阿尔茨海默病和血管痴呆症的风险更高,甚至与大脑缩相关.
科学领域:
- 神经科学是一个神经科学.
- 蛋白质组学是指蛋白质组学.
- 生物标志物发现发现
背景情况:
- 了解大脑衰老和痴呆症的发病性对于开发有效的干预措施至关重要.
- 机器学习为分析复杂的生物数据提供了新的方法,例如等离子体蛋白质组形状.
- 特定于大脑的分子特征可能为神经退行过程提供独特的见解.
研究的目的:
- 使用血蛋白开发和验证一种特定于大脑的生物年龄特征.
- 研究大脑特异性蛋白质年龄差距与发生痴呆的风险之间的关联.
- 探索大脑年龄差距与大脑衰老和痴呆症的神经成像标志物之间的关系.
主要方法:
- 利用来自45429名英国生物库参与者的血蛋白质组数据的机器学习来生成特定于大脑的生物年龄.
- 计算了大脑年龄差距,并使用Cox比例危险模型评估了它与所有原因痴呆症,阿尔茨海默病 (AD) 和血管痴呆症的相关性.
- 通过磁共振成像 (MRI) 数据证实了这些发现,以评估与全球和区域大脑缩和白质病变的关联.
主要成果:
- 较高的大脑年龄差距z-score与所有原因痴呆症 (HR1.67),AD (HR1.85) 和血管痴呆症 (HR1.86) 的风险增加显著相关.
- 具有极度老大脑衰老特征的个体 (大脑年龄差距z-score > 2) 显示所有原因和血管痴呆的风险增加了三倍以上,AD的风险增加了四倍.
- 大脑年龄差距和痴呆风险之间的关联在健康的生活方式因素较强的人群中更为强烈.
- 增加的大脑年龄差距与全球和区域灰质缩和MRI上的白质病变相关.
结论:
- 特定于大脑的蛋白质年龄差距是加速大脑衰老的强有力的生物标志物.
- 这种蛋白质年龄差距是未来痴呆风险的强大预测因素,包括阿尔茨海默病和血管痴呆症.
- 这些发现突显了血蛋白质组签名在早期检测和理解神经退行症方面的潜力.
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