Journal
TOXICOLOGY LETTERS
Volume 352, Issue -, Pages 26-33Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.toxlet.2021.09.008
Keywords
Hepatotoxicity; BDE-209; Reactive oxygen species; AhR; Nrf2
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Funding
- National Key R&D Program of China [2017YFC1600302]
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Polybrominated diphenyl ethers (PBDEs) are persistent organic pollutants that may have a negative impact on human health. The study found that BDE-209 induces apoptosis, oxidative stress, disturbances in calcium homeostasis and mitochondrial membrane potential, DNA damage, and potentially acts as a liver carcinogen. Interestingly, HepG2 cells attempt to metabolize BDE-209 through the Nrf2-mediated antioxidant pathway.
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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