甲基作为一种环境污染物,调节水性细菌中的毒性特征
Ana Rita Pereira1, Liliana Grenho2, Inês B Gomes1
1LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
饮用水中的甲基 (MP) 增加了细菌的毒性. MP暴露增强了Acinetobacter calcoaceticus和Stenotrophomonas maltophilia的生物膜形成和入侵能力,造成公共卫生风险.
科学领域:
- 环境微生物学环境微生物学
- 细菌病原发生的细菌.
- 分析水质,分析水质.
背景情况:
- 甲基 (MP) 是一种常见的防腐剂,由于不完全去除,污染了饮用水.
- 类化合物与内分泌干扰有关,但它们对细菌毒性的影响还未得到充分研究.
- 了解MP对环境细菌的影响对于公共卫生至关重要.
研究的目的:
- 调查环境相关的MP度对细菌毒性的影响.
- 评估MP对饮用水细菌的生长,外膜囊泡 (OMVs),生物膜形成和宿主细胞入侵的影响.
- 为了比较MP对Acinetobacter calcoaceticus和Stenotrophomonas maltophilia的影响.
主要方法:
- 对A. calcoaceticus和S. maltophilia的浮游生物和生物膜细胞暴露于MP (15μg/L).
- 细菌生长,OMV特征 (大小,脂质,蛋白质含量) 和OMV释放的分析.
- 评估生物膜形成能力和人类牙纤维细胞 (HGF) 的入侵.
主要成果:
- 在S. maltophilia和A. calcoaceticus中,MP暴露改变了OMV特征.
- 增加S. maltophilia生物膜衍生的OMV中的脂质含量;减少浮游生物细胞中的OMV和脂质含量.
- 在两种物种中增强生物膜形成;MP暴露的A. calcoaceticus浮游生物细胞增加HGF入侵.
结论:
- 在环境度下的MP可以显著放大细菌毒性机制.
- MP影响细菌OMV的产生和释放,影响病毒力.
- 这些发现突出了与饮用水中MP污染相关的潜在公共卫生问题.
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