PM2.5成分对肺功能恶化的影响以及慢性肺病患者系统性炎症的修饰作用
Jiayu Xu1, Zekang Su2, Yuxuan Nie3
1School of Public Health, Peking University, Beijing 100191, China.
Ecotoxicology and environmental safety
|October 14, 2025
概括
细颗粒物 (PM2.5) 和其组成部分如黑碳 (BC) 和硫酸盐 (SO42−) 在患有慢性肺病的患者中显著恶化肺功能. 较高的C-反应蛋白 (CRP) 水平加剧了这些有害影响,突出了排放控制和抗炎策略的必要性.
科学领域:
- 环境健康 环境健康
- 肺部医学 肺部医学
- 毒理学 毒理学 毒理学
背景情况:
- 颗粒物 (PM2.5) 暴露会对肺功能产生负面影响,但其特定的有毒成分和与全身炎症的相互作用尚未完全理解.
- 以前的研究表明,PM2.5会损害肺功能,但其成分的独特作用和与炎症的协同作用需要进一步研究.
研究的目的:
- 研究长期暴露于PM2.5及其成分与中国成年人的肺功能下降之间的关联.
- 确定导致肺功能受损的关键有毒PM2.5成分.
- 检查系统性炎症对这些关联的修饰作用,由C-反应蛋白 (CRP) 表示.
主要方法:
- 中国的一项全国性横截面研究,涉及1182名45-89岁的慢性肺病成年人.
- 使用权重定量总和 (WQS) 回归来评估PM2.5成分 (SO42−,NO3−,NH4+,BC,OM) 对峰值呼气流 (PEF) 的综合影响.
- 进行了相互作用分析,以评估C-反应蛋白 (CRP) 在修改PM2.5-肺功能关系中的作用.
主要成果:
- 增加暴露于PM2.5及其成分 (SO42−,NO3−,NH4+,BC,OM) 与减少PEF显著相关.
- 黑碳 (BC) 和硫酸盐 (SO42−) 被确定为影响最大的成分,其WQS重量分别为0.780和0.206.
- 升高的CRP水平与PEF进一步下降有关,这表明炎症加剧了PM2.5成分对肺功能的不良影响.
结论:
- 长期暴露于PM2.5,特别是其成分BC和SO42−,在患有慢性肺病的个体中显著损害肺功能.
- 较高的C-反应蛋白水平会放大PM2.5成分对肺功能的负面影响.
- 针对性地减少特定的PM2.5排放和实施抗炎干预措施对于保护高风险人群至关重要.
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