在废水微生物组中诱导社区转移,氧化应激反应,代谢重编程和毒性潜力
Amrita Bains1, Sanjeev Dahal2, Bharat Manna1
1Department of Civil and Environmental Engineering, The University of Auckland, Auckland, New Zealand; Water Research Centre, The University of Auckland, Auckland, New Zealand.
Water research
|August 20, 2025
概括
神经内分泌化合物l-norepinephrine (L-NE) 令人惊的是,它在废水中促进了优异的细菌生长,改变了微生物群落,并可能增加毒性. 这影响了废水处理和环境健康.
科学领域:
- 环境微生物学
- 废水微生物学
- 神经内分泌化合物影响
背景情况:
- 像l-上腺素 (L-NE) 这样的神经内分泌化合物进入废水,可能会增加细菌病原体的生长.
- 之前的研究集中在纯种植上,L-NE对废水中的复杂微生物群落的影响基本上是未知的.
- 城市化增加了废水中的神经内分泌化合物负载,突显了对微生物生态系统的影响的必要性.
研究的目的:
- 研究l-上腺素 (L-NE) 对复杂废水微生物群落的代谢和调节机制的影响.
- 为了比较L-NE与常规基质的影响,如乳糖和氧化应激剂H2O2.
- 评估L-NE对微生物群落结构,生长和工程生态系统中的潜在毒性的影响.
主要方法:
- 用L-NE,右和H2O2并行处理城市和农业废水.
- 微生物生长 (CFU mL-1),社区组成 (分类学概况) 和基因表达 (氧化应激和定数感应基因) 的分析.
- 应用向的元蛋白质组学和受蛋白质组约束的代谢建模来理解路径调制.
主要成果:
- 尽管碳含量较低,但L-NE治疗支持较高的细菌生长 (108 CFU mL-1),维持了 Pseudomonadaceae 主导的群体.
- 在L-NE暴露下,甲蛋白组学发现了氧化应激基因 (oxyR, soxRS) 和抗氧化酶的协调上调.
- L-NE显著增强了自身诱导基因表达 (luxS,qseC),表明社区级病毒性潜力增加.
结论:
- 作为废水中微生物群体动态的强大调节剂,L-诺尔上腺素促使意想不到的生长和代谢重编程.
- 这些发现挑战了对微生物基质利用的传统理解,揭示了对神经内分泌化合物的复杂调节反应.
- L-NE的影响对废水处理过程的稳定性和下游环境影响有重大影响,特别是在微生物毒性方面.
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