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尺寸分离的香烟气溶驱动ROS-线粒体功能障碍和在人类细胞类型中编程细胞死亡
Yi-En Tseng1,2, Ming-Chu Teng1,2, Yu-Siou Huang1,2
1Institute of Medical Science and Technology, National Sun Yat-sen University, Kaohsiung 804, Taiwan.
烧香释放的超细颗粒会导致细胞损伤. 这些微粒的有机成分是最有毒的,导致细胞死亡和线粒体功能障碍.
科学领域:
- 环境健康 环境健康
- 毒理学 毒理学 毒理学
- 气溶科学 气溶科学
背景情况:
- 烧香是室内微细和超细颗粒物 (PM) 的重要来源.
- 香烟气溶驱动细胞毒性的特定特性尚未得到充分理解.
- 了解这些决定因素对于评估室内空气质量和健康风险至关重要.
研究的目的:
- 为了描述香烟气溶的尺寸和化学特性.
- 为了确定不同香烟气溶分数和相的细胞毒性.
- 为了确定香烟诱导的细胞损伤背后的机制.
主要方法:
- 使用空气动力学粒子测量仪 (APS) 和扫描移动性粒子测量仪 (SMPS) 来鉴定三种香料类型的气溶.
- 使用微孔均沉积冲击器 (MOUDI) 分离气溶的尺寸.
- 提取水溶性 (WP) 和有机相 (OP) 组件,以制造用于细胞测试的香气溶提取物 (IAE).
主要成果:
- 来自细微 (<0.18微米) 和超细微 (<0.10微米) 分数的有机相IAE显示在A549,HEK293T和SH-SY5Y细胞中具有最高的细胞毒性和诱导的氧化应激和线粒体功能障碍.
- 桑达尔木占主导地位的香料 (A型) 气溶是最强大的.
- 超细的OP-IAE触发了细胞内H2O2的升高,线粒体膜潜能 (MMP) 的降低,ATP的枯竭,以及亡,烧亡和自途径的激活.
结论:
- 香中的超细,脂性气溶分离物是细胞毒性的关键驱动因素,导致氧化损伤和编程细胞死亡.
- 这项研究提供了对香烟气溶风险的尺寸和阶段解决的理解.
- 这些发现可以指导室内环境的缓解策略,在室内环境中使用大量的香水.
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