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用于吸入毒理学研究的不同有机含量参考超细烟尘颗粒的生成,表征和毒理学评估
Anusmita Das1, Jana Pantzke1, Seongho Jeong1
1Joint Mass Spectrometry Center (JMSC) at Comprehensive Molecular Analytics (CMA), Helmholtz Zentrum München, Ingolstädter Landstrasse 1, D-85764 Neuherberg, Germany; Joint Mass Spectrometry Center (JMSC) at Chair of Analytical Chemistry, Institute of Chemistry, University of Rostock, Albert-Einstein-Strasse 27, D-18059 Rostock, Germany.
The Science of the total environment
|August 24, 2024
概括
研究人员创建了参考超细颗粒 (UFP) 来研究空气污染疾病. 不同的UFPs有机含量,而不是物理性质,影响了特定的毒理反应,如DNA氧化.
科学领域:
- 环境健康 环境健康
- 毒理学 毒理学 毒理学
- 材料科学 材料科学 材料科学
背景情况:
- 超细颗粒 (UFP) 是空气污染的关键组成部分,与各种疾病有关.
- 没有完全理解UFP物理与化学性质的特定毒理影响.
- UFPs可能充当有毒化学品的载体,影响生物反应.
研究的目的:
- 开发可靠的方法来生成具有可控属性的参考UFP.
- 调查UFP有机负载与物理特征之间的差异性毒理效应.
- 建立UFP化学变异与观察到的生物反应之间的联系.
主要方法:
- 使用miniCAST生成了两种类型的燃烧相关的UFP,具有相似的物理特性,但有机含量不同.
- 使用催化剥离器和木炭剥离器来控制挥发性和半挥发性元件.
- 暴露在空气-液体界面的UFPs的人类膜上皮细胞,并评估了细胞毒性,细胞活力,异生物代谢,反应性氧化和DNA损伤.
主要成果:
- 参考UFPs的生产具有稳定,可重现的物理特征 (40纳米平均直径,~100μg/m3,2.0·105#/cm3).
- 有机含量高的UFP显示出显著的多环芳 (PAH) 含量.
- 这两种UFP类型都对细胞毒性和细胞活力产生了类似的影响;然而,高有机UFPs诱导了DNA氧化,而富含PAH的UFPs中,外来生物代谢更高.
结论:
- 开发的方法允许精确修改UFP的化学特性,同时保持一致的物理属性.
- 这种方法有助于调查UFP的特定化学成分如何导致毒性.
- 这些发现突显了UFP有机负载,特别是PAHs对细胞反应的差异性毒理影响.
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