Chloro-benzoquinones cause oxidative DNA damage through iron-mediated ROS production in Escherichia coli
文献类型：期刊论文
| 作者 | Chen, Zhilan; Zhou, Qiaohong; Zou, Dandan; Tian, Yun; Liu, Biyun; Zhang, Yongyuan; Wu, Zhenbin |
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2015-08 |
| 卷号 | 135期号:1页码:379-386 |
| 关键词 | Chloro-benzoquinones Oxidative DNA damage Iron ion ROS Escherichia coli ahpCF katEG mutants |
| 英文摘要 | Chloro-benzoquinones (CBQs) are a group of disinfection byproducts that are suspected to be potentially carcinogenic. Here, the mechanism of DNA damage caused by CBQs in the presence of ferrous ions was investigated in an Escherichia coil wild type M5 strain and a mutant L5 (ahpCF katEG mutant) strain that carried an enhanced green fluorescent protein reporter under the control of a SOS response gene (recA) promoter. All tested CBQs (including para-benzoquinone, 2-chloro-para-benzoquinone, and dichloro-para-benzoquinones with different substitutes) caused substantial oxidative DNA damage with EC50 values in the micromolar range. Moreover, 2,5-dichloro-para-benzoquinone (2,5-DCBQ), a typical CBQ caused substantial ROS production in Escherichia coil mutant cells. And ROS scavengers provided partial protective effects on genotoxicity of 2,5-DCBQ to Escherichia coil mutant cells. The addition of Fe2+ to the 2,5-DCBQ exposure system caused an increase in DNA oxidative damage; iron-chelating agents could partially prevent these cells from DNA damage. Finally, intracellular AhpCF, catalase E, and catalase G were all found to play an important role in the survival of E. coil cells exposed to CBQs, as indicated by an increased sensitivity of the ahpCF katEG mutant L5 strain to treatment compared with wild type M5 cells. Taken together, these results suggest that CBQs cause oxidative DNA damage in Escherichia coil cells through the participation of iron-mediated ROS production. (C) 2015 Elsevier Ltd. All rights reserved. |
| 研究领域[WOS] | Environmental Sciences |
| WOS记录号 | WOS:000356740900049 |
| 公开日期 | 2016-03-15 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/32537]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Chen, Zhilan,Zhou, Qiaohong,Zou, Dandan,et al. Chloro-benzoquinones cause oxidative DNA damage through iron-mediated ROS production in Escherichia coli[J]. CHEMOSPHERE,2015,135(1):379-386. |
| APA | Chen, Zhilan.,Zhou, Qiaohong.,Zou, Dandan.,Tian, Yun.,Liu, Biyun.,...&Wu, Zhenbin.(2015).Chloro-benzoquinones cause oxidative DNA damage through iron-mediated ROS production in Escherichia coli.CHEMOSPHERE,135(1),379-386. |
| MLA | Chen, Zhilan,et al."Chloro-benzoquinones cause oxidative DNA damage through iron-mediated ROS production in Escherichia coli".CHEMOSPHERE 135.1(2015):379-386. |
入库方式： OAI收割
来源：生态环境研究中心
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