聚乙烯微塑料诱导大小依赖于小鼠的多器官损伤:洞察肠道微生物群和便代谢物
Zhu Zhang1, Wenqing Chen2, Hiutung Chan2
1Golden Meditech Centre for NeuroRegeneration Sciences, Hong Kong Baptist University, Hong Kong Special Administrative Region; Department of Biology, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong Special Administrative Region.
Journal of hazardous materials
|September 17, 2023
概括
微塑料 (MP) 颗粒大小显著影响生物毒性. 较小的MP (0.5微米) 分布更广泛,导致器官损伤和炎症,而较大的MP (5微米) 诱导小鼠的肠道屏障功能障碍和神经炎症.
科学领域:
- 环境科学 环境科学
- 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:
- 微塑料 (MP) 颗粒大小是生物毒性的关键决定因素.
- 了解不同MP大小的差异性毒性对于风险评估至关重要.
研究的目的:
- 在哺乳动物模型中研究不同尺寸的聚烯MP (0.5微米和5微米) 的系统毒性.
- 为了阐明MPs的大小依赖的生物分布和毒性途径.
主要方法:
- 用MPs口服给C57BL/6J小鼠8周.
- 使用了组织病理学,分子生物学分析,16S rRNA测序和非向代谢学.
- 分析MP分布和器官特异性毒性.
主要成果:
- 国会议员表现出尺寸依赖的生物分布,较小的颗粒在器官中分布更大.
- 0.5微米的MPs在多个器官 (脏,脏,心脏,肺,肝脏) 中引起显著的炎症和机械损伤.
- 5微米的MP导致严重的肠壁功能障碍,肠道失调,代谢障碍和神经炎症.
结论:
- 的MP大小决定了生物分布和毒性机制.
- 较小的MP带来更大的系统器官损伤风险,而较大的MP主要影响肠道和相关的神经通路.
- 这些发现有助于我们更好地了解哺乳动物中微塑料的毒性.
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