长期暴露于环境颗粒物质和老年人的结构性大脑变化
Giulia Grande1,2, Bolin Wu1, Jing Wu3
1Aging Research Center, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet and Stockholm University, Sweden (G.G., B.W., G.K., E.J.L., T.B., D.R.).
Stroke
|May 12, 2025
概括
长期暴露于细颗粒物 (PM$_{2.5}$) 与大脑结构变化,如缩和血管问题有关. 减少空气污染可能会保护老年人的大脑健康.
科学领域:
- 环境健康 环境健康
- 神经科学是一个神经科学.
- 流行病学 流行病学
背景情况:
- 空气污染,特别是细颗粒物 (PM2.5和PM10),越来越多地与老年人的认知能力下降有关.
- 空气污染对大脑结构的具体影响仍然不完全理解.
- 这项研究调查了长期暴露于PM2.5和PM10和结构性大脑变化之间的关联.
研究的目的:
- 量化长期暴露于PM$_{2.5}$和PM$_{10}$与晚年大脑结构变化之间的关系.
- 评估空气污染对大脑组织总体体积,海马体和白质超强度的影响.
主要方法:
- 利用了瑞典国家老龄化和护理研究的数据,包括457名参与者.
- 使用重复磁共振成像 (MRI) 在3-6年内评估大脑结构.
- 使用住宅地址的分散模型估计了长期空气污染暴露 (PM$_{2.5}$和PM$_{10}$),并使用多调整线性回归分析.
主要成果:
- 较高的PM2.5和PM10基线暴露与较小的总脑组织体积有关.
- 随访暴露在PM>8.7μg/m^3与加速每年大脑组织体积缩小相关.
- 增加的PM$_{2.5}$暴露也与每年白质超强度的更大增加有关.
结论:
- 长期暴露于相对较低水平的PM与显著的结构性大脑变化有关,包括缩和血管病理.
- 这些发现强调空气污染是认知能力下降的可修改风险因素,并强调需要进行干预来保护大脑的完整性.
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