基础科学和病原发生学
Trevor Lohman1, Fatemah Shenasa2, Isabel Sible3
1Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
高血压的变化,特别是增加的平均真实变化 (ARV) 和门诊动脉硬度指数 (AASI),与老年人的神经退行症标志物有关. 这种结合的血液动力学不稳定性加剧了中间叶缩,增加了神经纤维光水平.
科学领域:
- 神经学 神经学
- 心血管科学 心血管科学
- 衰老研究研究 衰老研究
背景情况:
- 血压变化 (BPV) 是与年龄有关的神经退行性疾病的一个确定的风险因素.
- 不同的BPV测量对大脑健康的不同和相互作用的影响仍然不完全理解.
- 加高的脉冲压变化以及高的节拍变化可能表明血液动力学不稳定性,可能会恶化神经退行.
研究的目的:
- 为了研究两种不同的血压变化指标对老年人神经退行性标志物的相互作用效应.
- 为了检查平均真实变化率 (ARV) 和外行动脉硬度指数 (AASI) 与中间叶缩和特定生物标志物之间的关联.
主要方法:
- 105名老年人接受了持续的血压监测和脑部核磁共振.
- 血压变化被量化使用系统平均真实变化 (ARV) 和门诊动脉硬度指数 (AASI).
- 分析了ARV和AASI对中间叶缩,血神经丝光 (NfL) 和状纤维酸蛋白 (GFAP) 的相互作用影响.
主要成果:
- 较高的ARV和较高的AASI之间的显著相互作用与海马和脑内皮层体积的减少有关.
- 这种相互作用术语与左侧中间叶缩相关,通过感兴趣的区域和基于voxel的形态学分析得到证实.
- 高ARV和AASI的联合作用与血NfL水平的升高有显著联系,但不是GFAP.
结论:
- 增加的ARV和AASI之间的相互作用独立地预测了社区居住的老年人中神经退行性标志物的增加.
- 呈现高ARV和高AASI的个体表现出中叶神经退行最明显的标志物.
- 这些发现凸显了联合血液动力学不稳定对老年人群大脑健康的有害影响.
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