Water-dispersible nano-pollutions reshape microbial metabolism in type-specific manners:A metabolic and bacteriological investigation in Escherichia coli  

作　　者：Shuqin Liu Rui Wu Xi Yang Shuting Fang Zhangmin Xiang Shenghong Yang Gangfeng Ouyang 

机构地区：[1]Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology,Guangdong Provincial Engineering Research Center for Ambient Mass Spectrometry,Institute of Analysis,Guangdong Academy of Sciences(China National Analytical Center Guangzhou),Guangzhou 510070,China [2]Shandong Provincial Key Laboratory of Molecular Engineering,School of Chemistry and Chemical Engineering,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250353,China [3]KLGHEI of Environment and Energy Chemistry,School of Chemistry,Sun Yat-sen University,Guangzhou 510275,China

出　　处：《Frontiers of Environmental Science & Engineering》2022年第9期53-64,共12页环境科学与工程前沿（英文）

基　　金：support from the projects of the National Natural Science Foundation of China(Nos.22006143,21806189);the Science and Technology Program of Guangzhou(China)(No.202102020601);the Natural Science Foundation of Guangdong Province(China)(No.2021A1515012336);the Guangdong Provincial Key R&D Programme(China)(No.2020B1111350002);the special project of Guangdong Enterprise Science and Technology Commissioner(China)(No.GDKTP2021011600).

摘　　要：Incomplete separation and recycling of nanoparticles are causing undesirable nanopollution and thus raising great concerns with regard to nanosafety.Since microorganisms are important regulator of physiological processes in many organisms,the interaction between nanopollution and microbial metabolomics and the resultant impact on the host’s health are important but unclear.To investigate how typical nanopollution perturbs microbial growth and metabolism,Escherichia coli(E.coli)in vitro was treated with six water-dispersible nanomaterials(nanoplastic,nanosilver,nano-TiO 2,nano-ZnO,semiconductor quantum dots(QDs),carbon dots(CDs))at human-/environment-relevant concentration levels.The nanomaterials exhibited type-specific toxic effects on E.coli growth.Global metabolite profiling was used to characterize metabolic disruption patterns in the model microorganism exposed to different nanopollutants.The percentage of significant metabolites(p<0.05,VIP>1)accounted for 6%–38%of the total 293 identified metabolites in each of the nanomaterial-contaminated bacterial groups.Metabolic results also exhibited significant differences between different nanopollutants and dose levels,revealing type-specific and untypical concentration-dependent metabolic responses.Key metabolites responsive to nanopollution exposures were mainly involved in amino acid and purine metabolisms,where 5,4,and 7 significant metabolic features were included in arginine and proline metabolism,phenylalanine metabolism,and purine metabolism,respectively.In conclusion,this study horizontally compared and demonstrated how typical nanopollution perturbs microbial growth and metabolomics in a type-specific manner,which broadens our understanding of the ecotoxicity of nanopollutants on microorganisms.

关 键 词：Nano-toxicity NANO-PLASTICS Quantum dots Microbial metabolite Metabolic dysregulation 

分 类 号：X52[环境科学与工程—环境工程]