补充系统在肺部对环境颗粒的急性炎症反应中被激活
Kerui Zhang1, Akiko Honda1, Tomoya Sagawa2
1Graduate School of Engineering, Kyoto University, Kyoto, Japan.
Ecotoxicology and environmental safety
|May 2, 2025
概括
亚洲沙尘 (ASD) 和其他颗粒物 (PM) 激活补充系统,导致急性肺炎. 自闭症的矿物成分是这种炎症反应的关键驱动因素.
科学领域:
- 环境健康 环境健康
- 免疫学 免疫学 免疫学
- 毒理学 毒理学 毒理学
背景情况:
- 短期暴露于颗粒物 (PM) 引发了急性炎症反应,并激活了补充成分C5.
- 需要进一步阐明PM诱导的补体激活,炎症和致病因素之间的精确联系.
研究的目的:
- 为了研究急性炎症反应和补充C5激活水平,暴露于不同类型的PM后.
- 确定有助于补充激活和肺炎的特定PM成分.
主要方法:
- 在小鼠体内注射了四种类型的PM:二氧化 (TiO2),柴油废气颗粒 (DEP),亚洲沙尘 (ASD) 和环境PM2.5.5.
- 评估了补充激活标志物 (C5,C5aR1,C5b-9) 和炎症反应.
- 拉曼显微镜,ICP-MS和EDXRF被用来分析PM成分及其与中性粒细胞的接近.
主要成果:
- 暴露于ASD,DEP和PM2.5显著增加了C5b-9在肺组织中的沉积.
- 所有PM类型都对C5aR1表达进行了上调,主要在中性粒细胞中.
- 暴露在ASD暴露显示了中性粒细胞附近的矿物成分 (Si,K,Mg,Al,Fe);Si,Mg,Al和K是炎症和补充激活的强有力的贡献者.
- 自闭症诱导了最严重的急性炎症反应和补充系统激活.
结论:
- 由其矿物成分驱动的ASD诱导的补充系统激活,在中性粒细胞激活和急性肺炎中起着关键作用.
- 颗粒物成分显著影响补充系统的激活和与空气污染相关的健康风险的严重程度,特别是急性肺炎.
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