木烟和柴油废气:人类呼吸道上皮质中明显的转录基因特征
Ryan D Huff1, Christopher F Rider1, Theodora Lo2
1Air Pollution Exposure Laboratory (APEL), Division of Respiratory Medicine, University of British Columbia, Canada.
Ecotoxicology and environmental safety
|June 28, 2025
概括
木烟和柴油废气暴露对人类支气管细胞的影响不同,尽管颗粒物含量相似. 这凸显了空气污染成分比度对健康影响的重要性.
科学领域:
- 环境健康 环境健康
- 毒理学 毒理学 毒理学
- 分子生物学分子生物学
背景情况:
- 气候变化加剧了野火,增加了木烟 (WS) 排放.
- 与交通有关的空气污染 (TRAP),以柴油废气 (DE) 为模型,是主要的城市污染物.
- 无论是WS还是DE都含有细颗粒物 (PM2.5),这对呼吸系统健康构成重大风险.
研究的目的:
- 为了比较木烟 (WS) 和柴油废气 (DE) 对人类支气管上皮细胞 (HBEC) 的明显的转录效应.
- 研究WS和DE的独特成分如何影响细胞反应.
- 通过评估除度之外的污染物类型的影响,为空气污染的监管方法提供信息.
主要方法:
- 在空气-液体界面培养的原始人类支气管上皮细胞 (HBEC) 暴露于过空气 (对照),WS或DE (300μg/m3 PM2.5).
- 暴露时间为2小时.
- 使用RNA测序分析差异基因表达和途径调制.
主要成果:
- 与WS相比,DE暴露含有更高的NO2,CO和O3水平.
- WS暴露调节了159个与核糖体和细胞染色体通路相关的基因.
- 接触DE调节了439个与HIF-1信号传递,呼吸链和干扰素通路相关的基因,这表明感染风险增加.
结论:
- 木烟和柴油废气对HBECs产生明显的转录学效应.
- 空气污染的组成,而不仅仅是PM2.5度,显著影响细胞反应.
- 这些发现挑战了假设不同空气污染物的相似度对健康产生同等影响的假设.
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