空气污染,鼻子微生物群和支气管炎:通过多层次的方法了解它们的相互作用
Marco Cafora1, Marco Severgnini2, Chiara Favero3
1Department of Clinical Sciences and Community Health, Dipartimento di Eccellenza 2023-2027, University of Milan, Italy; Department of Medical Biotechnology and Translational Medicine, University of Milan, Italy.
Environmental research
|October 5, 2025
概括
空气污染会改变婴儿鼻腔细菌,增加支气管炎的严重程度. 来自Haemophilus influenzae的细菌细胞外囊泡恶化炎症,突出了对婴儿呼吸系统健康的环境和微生物影响.
科学领域:
- 环境健康 环境健康
- 微生物学 微生物学
- 儿科呼吸系统医学 儿科呼吸系统医学
背景情况:
- 支气管炎是一种严重的婴儿呼吸系统疾病,通常是由RSV引起的.
- 影响支气管炎严重性的因素,特别是环境暴露,如颗粒物 (PM),尚未完全理解.
- 细菌鼻腔微生物群 (bNM) 可能调节支气管炎中对环境触发因素的免疫反应.
研究的目的:
- 研究PM暴露对婴儿气管炎bNM组合的影响.
- 探索细菌细胞外囊泡 (bEVs) 在调解对PM暴露的炎症反应中的作用.
- 为了检查空气污染,bNM和支气管炎病原体之间的相互作用.
主要方法:
- 一项对110名患有支气管炎的婴儿和49名健康对照的病例对照研究.
- 分析bNM成分与前三周PM10和PM2.5暴露水平的关系.
- 在体内斑马鱼模型评估来自Haemophilus influenzae的细菌细胞外囊泡 (bEV) 的炎症作用.
主要成果:
- 在支气管炎病例和健康对照人群之间观察到bNM组成的显著差异.
- 增加的PM暴露与Hemophilus influenzae的较高相对丰度有关.
- 来自Haemophilus influenzae的bEV诱导了斑马鱼胚胎的炎症反应,包括中性粒细胞的招募和炎症基因的升高调节.
结论:
- 暴露于空气污染会改变婴儿的bNM组成,可能会加剧支气管炎的严重程度.
- 细菌细胞外囊泡在支气管炎的炎症过程中起着重要的作用.
- 研究结果提供了关于环境因素,微生物群和宿主免疫力在婴儿呼吸道感染中的相互作用的见解.
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