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颗粒物通过调节炎症路径并降低病原体响应基因表达来损害免疫系统功能.

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科学领域:

  • 环境健康 环境健康
  • 免疫学 免疫学 免疫学
  • 分子生物学分子生物学

背景情况:

  • 空气中的颗粒物 (PM) 暴露与增加感染疾病易感性有关.
  • 免疫细胞对PM的反应的分子机制尚未完全理解.
  • 免疫细胞中由PM引起的基因表达变化需要系统的整合.

研究的目的:

  • 分析暴露于粗颗粒物 (PM10) 的人类免疫细胞的mRNA概况.
  • 确定PM10暴露引起的分子机制和基因表达变化.
  • 了解PM10对免疫细胞功能和宿主防御的影响.

主要方法:

  • 用RNA测序 (RNA-seq) 来分析mRNA配置文件.
  • 人类外周血液单核细胞 (PBMC) 暴露于PM10.
  • 分析了基因表达,调节和信号通路.

主要成果:

  • 暴露于PM10会重新编程免疫细胞中的1,196个基因的表达.
  • 一个促炎状态被激活,细胞因子和化学因子的增加.
  • 观察到IL-36信号通路的激活和NK细胞招募化学基因的抑制.
  • 炎症途径的转录因子增加,而RNase和病原体反应基因减少.

结论:

  • 暴露于PM10会破坏免疫细胞的功能,影响抗病毒反应和宿主防御.
  • 升级的化学激素表明了PM诱导的炎症机制.
  • 抑制的病原体反应基因表明宿主防御能力受损.