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Dimethyl phthalate damages Staphylococcus aureus by changing the cell structure, inducing oxidative stress and inhibiting energy metabolism

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Journal of Environmental Sciences 2021年第9期33卷 171-183页

作者： Xiaohui Zhu Hong Liu Zhigang Wang renmao tian Shenglin Li School of Life Science and Agriculture Forestry Qiqihar UniversityQiqiharHeilongjiang 161006China Heilongjiang Provincial Technology Innovation Center of Agromicrobial Preparation Industrialization Qiqihar 161006China Institute for Food Safety and Health Illinois Institute of TechnologyChicagoIL 60501USA Key Laboratory of Saline-alkali Vegetation Ecology Restoration Ministry of EducationCollege of Life SciencesNortheast Forestry UniversityHarbin 150040China

Dimethyl phthalate(DMP), used as a plasticizer in industrial products, exists widely in air,water and *** aureus is a typical model organism representing Gram-positive *** molecular mechanisms of DMP toxicology in *** were researched by proteomic and transcriptomic *** results showed that the cell wall, membrane and cell surface characteristics were damaged and the growth was inhibited in *** by *** stress was induced by DMP in *** activities of succinic dehydrogenase(SDH) and ATPase were changed by DMP, which could impact energy *** on proteomic and transcriptomic analyses, the oxidative phosphorylation pathway was enhanced and the glycolysis/gluconeogenesis and pentose phosphate pathways were inhibited in *** exposed to *** results of real-time reverse transcription quantitative PCR(RT-qPCR) further confirmed the results of the proteomic and transcriptomic *** acid, pyruvic acid and glucose were reduced by DMP in ***, which suggested that DMP could inhibit energy *** results indicated that DMP damaged the cell wall and membrane, induced oxidative stress, and inhibited energy metabolism and activation in ***.

关键词： Dimethyl phthalate Staphylococcus aureus Cell micro-interface Oxidative stress Energy metabolism Proteomics and transcriptomics analyses

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The intestinal microbiome of an Indo-Pacific humpback dolphin(Sousa chinensis)stranded near the Pearl River Estuary,China

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Integrative Zoology 2021年第3期16卷 287-299页

作者： Xiaoling WAN Jia LI Zhaolong CHENG Mengxue AO renmao tian Richard William MCLAUGHLIN Jinsong ZHENG Ding WANG The Key Laboratory of Aquatic Biodiversity and Conservation of the Chinese Academy of Sciences Institute of HydrobiologyChinese Academy of SciencesWuhanChina University of Chinese Academy of Sciences BeijingChina Yellow Sea Fisheries Research Institute Chinese Academy of Fishery SciencesQingdaoChina Institute for Environmental Genomics Department of Microbiology and Plant BiologySchool of Civil Engineering and Environmental SciencesUniversity of OklahomaNormanOklahomaUSA Institute for Food Safety and Health Illinois Institute of TechnologyBedford ParkIllinoisUSA General Studies Gateway Technical CollegeKenoshaWisconsinUSA

The mammalian intestinal microbiome is critical for host health and disease ***,the cetacean intestinal microbiota remains relatively *** using high-throughput 16S rRNA gene sequencing,we analyzed intestinal bacterial samples from an Indo-pacific humpback dolphin(Sousa chinensis)stranded near the Pearl River Estuary in *** samples included 3 anatomical regions(foregut,midgut,and rectum)and 2 anatomical locations(content and mucus).Our analyses revealed that the dolphin intestinal bacteria contained 139 operational taxonomic units(OTUs),dominated at the phyla level by Firmicutes(47.05%in the content;94.77%in the mucus),followed by Bacteroidetes(23.63%in the content;1.58%in the mucus)and Gammaproteobacteria(14.82%in the content;2.05%in the mucus).The intestinal bacteria had a small core community(15 OTUs,accounting for 99.74%of the reads),some of which could be potentially pathogenic to both human and *** an alternative to sampling the dolphin intestinal bacteria,fecal sampling could be ***,function potentials such as,xenobiotics biodegradation,beta-lactam resistance,and human disease-related pathways,were detected in the dolphin intestinal *** findings provide the first baseline knowledge of the intestinal microbiome of the Indo-Pacific humpback dolphin,which may offer new insights into cetacean conservation by using microbial surveillance.

关键词： 16S rRNA gene high-throughput sequencing anthropogenic impact cetacean indo-pacific humpback dolphin intestinal microbiota

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