AhR-mediated CYP1A1 and ROS overexpression are involved in hepatotoxicity of decabromodiphenyl ether (BDE-209)

文献类型： 外文期刊

第一作者： Yuan, Jinwen

作者： Yuan, Jinwen;Sun, Xiaoming;Che, Siyan;Zhang, Li;Ruan, Zheng;Li, Xiaomin;Yang, Junhua

作者机构：

关键词： Hepatotoxicity; BDE-209; Reactive oxygen species; AhR; Nrf2

期刊名称：TOXICOLOGY LETTERS （ 影响因子：4.374； 五年影响因子：4.372 ）

ISSN： 0378-4274

年卷期： 2021 年 352 卷

页码：

收录情况： SCI

摘要： Polybrominated diphenyl ethers (PBDEs) are persistent organic pollutants. They are constantly detected in terrestrial, ocean, and atmospheric systems, and it is of particular concern that these fat-soluble xenobiotics may have a negative impact on human health. This study aimed to evaluate the toxic effect and underlying mechanism of decabromodiphenyl ether (BDE-209) on human liver in a HepG2 cell model. The results showed that BDE-209 significantly induced HepG2 cells apoptosis, increased intracellular reactive oxygen species (ROS), disturbed [Ca2+] homeostasis and mitochondrial membrane potential (MMP), and caused nuclear shrinkage and DNA double-strand breaks. BDE-209 also significantly decreased the activities of antioxidant parameters, superoxide dismutase (SOD), total antioxygenic capacity (T-AOC), glutathione (GSH), and total glutathione (T-GSH). The up-regulation of the Aryl hydrocarbon receptor (AhR)/cytochrome P4501A1 (CYP1A1) signaling pathway indicates that after long-term and high-dose exposure, BDE-209 may be a liver carcinogen. Interestingly, HepG2 cells attempt to metabolize BDE-209 through the Nrf2-mediated antioxidant pathway. These findings help elucidate the mechanisms of BDE-209-induced hepatotoxicity in humans. (C) 2021 Published by Elsevier B.V.

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