聚烯微塑料对Pseudomonas aeruginosa的代谢水平的影响
Hui Tao1, Lingqin Zhou1, Duo Yu1
1Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing 210098, PR China; College of Environment, Hohai University, Nanjing 210098, PR China.
The Science of the total environment
|February 29, 2024
概括
聚烯微塑料 (PS-MPs) 破坏了Pseudomonas aeruginosa的新陈代谢,减少了脂质和氨基酸等必需分子. 这影响了细菌的生长和防御,突出了微塑料对水安全的风险.
科学领域:
- 环境微生物学 环境微生物学
- 毒理学 毒理学 毒理学
- 代谢学 代谢学 代谢学
背景情况:
- Pseudomonas aeruginosa 是一种常见的水污染物,具有健康风险.
- 微塑料,特别是聚烯微塑料 (PS-MPs),是普遍存在的环境污染物.
- 了解微生物对PS-MPs的代谢反应对于评估生态和健康影响至关重要.
研究的目的:
- 在暴露于聚烯微塑料 (PS-MPs) 时,调查Pseudomonas aeruginosa的代谢变化.
- 阐明PS-MPs对细菌新陈代谢影响的分子水平机制.
- 评估这些代谢变化对细菌功能和生存的影响.
主要方法:
- 使用非向代谢学来识别暴露于PS-MPs的Pseudomonas aeruginosa中的差异代谢物.
- 在阳性和阴性离子模式下分析了代谢物概况.
- 基因和基因组的京都百科全书 (KEGG) 途径分析被整合起来,以了解受影响的代谢途径.
主要成果:
- 观察到细菌代谢物的显著变化,主要影响脂质,核酸,氨基酸和有机酸.
- 暴露于PS-MP导致氧化损伤增加,脂质和核酸代谢物减少.
- 氨基酸的下调 (例如,L-Glutamic,L-Proline) 和有机酸的抑制 (pyruvate,酸盐) 破坏了能量代谢和蛋白质合成.
- 凯格分析显示PS-MPs影响的途径包括ABC载体,氨基酸-tRNA生物合成,纯素代谢,甘油脂代谢和TCA循环.
结论:
- 聚乙烯微塑料显著阻碍了Pseudomonas aeruginosa的代谢途径,损害了蛋白质,DNA和RNA合成.
- 这些干扰影响了细菌的增殖,信息传导,能量循环和整体细胞生长.
- 这项研究有助于了解微塑料毒性和微生物防御机制,这些机制与饮用水安全和人类健康有关.
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