虫肠道编排双宿主-微生物组排毒6PPD-氨酸
Ruiying Shi1, Weitao Liu1, Xinwei Shi1
1MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
有毒的轮胎化学物质6PPD-在虫肠道中积累,在那里宿主微生物群的协同作用推动了它的排毒. 这样可以突出显示肠道.
科学领域:
- 环境化学环境化学
- 生态毒理学 生态毒理学
- 微生物生态学 微生物生态学
背景情况:
- 轮胎产生的化学物质N-(1,3-二甲基) -N'--p-phenylenediamine-quinone (6PPD-Q) 具有重大环境风险.
- 对于6PPD-Q在土壤无脊椎动物中的环境命运和排毒机制的了解很少.
研究的目的:
- 为了研究6PPD-Q在虫中的组织分布,消除,生物转化和解毒.
- 阐明宿主微生物群相互作用在6PPD-Q的代谢中的作用.
主要方法:
- 对地的暴露研究,以确定6PPD-Q组织分布和生物积累因子 (BAF).
- 代谢分析以使用I和II期解毒途径识别6PPD-Q代谢物.
- 微生物社区分析 (16S rRNA测序) 和体外试验测试,以评估微生物在生物转化中的作用.
主要成果:
- 6PPD-Q表现出组织特异性的积累,主要在肠道 (BAF = 0.489).
- 鉴定了17种代谢物,表明通过细胞P450 (CYP450) 酶进行解毒.
- 暴露改变了微生物动态,丰富了排毒细菌 (例如,Paenibacillus,Pseudarthrobacter) 并增强了微生物网络的连接性和弹性.
- 实验室试验证实了微生物降解途径产生化,乙化和甲基化产品.
结论:
- 虫肠道充当了6PPD-Q的储存库和生物反应器.
- 主体微生物群的协同作用对于土壤无脊椎动物中6PPD-Q排毒至关重要.
- 研究结果提供了有关陆地生态系统中的污染物生物修复策略的见解.
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