柴油废气颗粒改变了线粒体的生物能量和cAMP在人类支气管上皮细胞的生产能力
Isabella Cattani-Cavalieri1,2,3,4, Marina Trombetta-Lima5, Hong Yan1
1Department of Molecular Pharmacology, University of Groningen, Groningen, Netherlands.
Frontiers in toxicology
|August 9, 2024
概括
柴油废气颗粒 (DEP) 通过破坏线粒体和减少循环AMP (cAMP) 信号传输来损害肺细胞. 这项研究揭示了DEP暴露如何影响细胞功能,这可能解释了空气污染.
科学领域:
- 环境健康科学 环境健康科学
- 细胞生物学 细胞生物学
- 毒理学 毒理学 毒理学
背景情况:
- 柴油燃烧造成的空气污染会产生柴油废气颗粒 (DEP).
- 暴露于DEP与炎症,氧化应激和肺功能降低有关.
- 循环AMP (cAMP) 信号传递对于肺部平衡至关重要,但其对DEP的反应尚不清楚.
研究的目的:
- 研究DEP对人类支气管上皮细胞中线粒体生物能量的影响.
- 评估DEP对氧化应激和炎症标志物的影响.
- 确定DEP如何影响cAMP信号通路的组件和功能.
主要方法:
- 人类支气管上皮细胞 (BEAS-2B) 被暴露在DEP中24-72小时.
- 评估了线粒体生物能学,氧化应激,炎症标志物和cAMP信号组件.
- 测量了基因和蛋白质表达,以及细胞呼吸.
主要成果:
- 暴露于DEP会损害线粒体形态和功能,减少呼吸和糖分处理能力.
- DEP增加了炎症标志物 (IL-8,IL-6) 和氧化应激指标.
- DEP显著改变了cAMP信号组件,降低了腺环酶9和整体cAMP水平.
结论:
- DEP诱导线粒体功能障碍,氧化应激,以及肺上皮细胞的炎症.
- 暴露于DEP在很大程度上抑制了cAMP信号通路.
- 这些细胞反应可能会导致与空气污染相关的肺功能障碍.
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