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Insights into enhanced biodegradation of sulfadimethoxine by catalyst: Transcriptomic responses and free radical interactions by Lan Zhang; Yun Liu; Ming Zhong; Zhongpei Li; Yuanhua Dong; Phillip Gedalanga is a Environmental Science article available to read on EtoBox.

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The occurrence of sulfonamides in the environment is a severe global threat to public health due to the increasing prevalence of antibiotic selection pressure that may lead to the development of antibiotic resistance. We report an enhanced biodegradation of sulfadimethoxine (SDM) by Phanerochaete chrysosporium (Pc) with lignocellulosic biomass (Lb) using FeO-ZSM-5 as a catalyst (Pc/FeO-ZSM-5/Lb). SDM was completely degraded within 4 days at pH 7.0 in the Pc/FeO-ZSM-5/Lb system. Transcriptomic, metabolites and free radical analyses were performed to explore the detailed molecular mechanisms of SDM degradation. A total of 246 genes of Pc in the Pc/FeO-ZSM-5/Lb system exhibited significant upregulation compared to that in Pc alone. Upregulated genes encoding cellulases, cytochrome P450, cellobiose quinone oxidoreductase, and cellobiose dehydrogenase were involved in SDM degradation in the Pc/FeO-ZSM-5/Lb system. In addition, genes encoding glutathione S-transferase and cytochrome P450 genes related to oxidative stress and detoxification were all significantly upregulated (P < 0.01). Electron paramagnetic resonance revealed the generation of OH suggesting a free radical pathway could b

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Author

Lan Zhang; Yun Liu; Ming Zhong; Zhongpei Li; Yuanhua Dong; Phillip Gedalanga

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Environmental Science (Physical Sciences)