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Effects of carbon sources on 17 beta-estradiol degradation by Sphingomonas sp. and the analysis of the involved intracellular metabolomics.
Environmental Science: Processes & Impacts ( IF 4.3 ) Pub Date : 2019-12-16 , DOI: 10.1039/c9em00438f
Changwei Li 1 , Xianwang Kong 1 , Lihua Lan 1 , Musa Abubakar Tadda 1 , Dezhao Liu 1
Affiliation  

17β-estradiol (E2) ubiquitously exists in various water bodies with long-term endocrine-disrupting and carcinogenic impacts on wildlife even at the trace level of ng L-1. However, it remains unclear how easy-to-degrade carbon sources alter E2 biodegradation patterns. In this study, E2 biodegradation by Sphingomonas sp. MCCC 1A06484 was investigated with regard to alternative carbon sources. Results showed that the bacterium preferentially utilized glucose, sodium succinate and sodium acetate over E2. Interestingly, the presence of these preferred nutrients increased the E2 removal efficiency by 20.1%. Furthermore, a positive relation (p < 0.05) between the utilization of total organic carbon (TOC) and E2 was found. Using intracellular metabolomics by UHPLC-QTOF-MS, 11 up-regulated and 35 down-regulated metabolites (variable importance > 1, p < 0.05) were identified in the bacterium when cultivated with E2 under various carbon and nitrogen backgrounds. The E2 exposure contributed to metabolism changes of lipid, nucleotide, carbohydrate, amino acid and membrane transport, which were considered to play roles in the E2 metabolism. The up-regulated phosphatidylcholine might act as an indicator during the bacterial degradation of E2. Generally, this study contributes to an in-depth understanding of E2 biodegradation in complex environments with multiple carbon and nitrogen sources.

中文翻译:

碳源对鞘氨醇单胞菌(Sphingomonas sp。)17β-雌二醇降解的影响。以及相关细胞内代谢组学的分析。

17β-雌二醇(E2)普遍存在于各种水体中,即使在ng L-1的痕量水平下,也会对野生生物造成长期的内分泌干扰和致癌作用。但是,尚不清楚易降解的碳源如何改变E2生物降解方式。在这项研究中,鞘氨醇单胞菌(Sphingomonas sp。)的E2生物降解。针对替代碳源,对MCCC 1A06484进行了调查。结果表明,该细菌比E2优先利用葡萄糖,琥珀酸钠和乙酸钠。有趣的是,这些优选营养素的存在使E2去除效率提高了20.1%。此外,还发现总有机碳利用率(TOC)与E2之间呈正相关(p <0.05)。使用UHPLC-QTOF-MS进行的细胞内代谢组学研究,上调了11种代谢物,下调了35种代谢物(重要性> 1,当在各种碳和氮背景下用E2培养时,在细菌中鉴定出p <0.05)。E2暴露导致脂质,核苷酸,碳水化合物,氨基酸和膜转运的代谢变化,这些变化被认为在E2代谢中起作用。上调的磷脂酰胆碱可能是E2细菌降解过程中的指示剂。通常,这项研究有助于深入了解具有多种碳和氮源的复杂环境中的E2生物降解。上调的磷脂酰胆碱可能是E2细菌降解过程中的指示剂。通常,这项研究有助于深入了解具有多种碳和氮源的复杂环境中的E2生物降解。上调的磷脂酰胆碱可能是E2细菌降解过程中的指示剂。通常,这项研究有助于深入了解具有多种碳和氮源的复杂环境中的E2生物降解。
更新日期:2020-02-13
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