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Polybrominated diphenyl ethers quinone-induced intracellular protein oxidative damage triggers ubiquitin-proteasome and autophagy-lysosomal system activation in LO2 cells
Wang, Yuting; Xu, Lei; Peng, Lu; Fang, Changyu; Qin, Qi; Lv, Xuying; Liu, Zixuan; Yang, Bingwei; Song, Erqun; Song, Yang
2021-07
Source PublicationCHEMOSPHERE
ISSN0045-6535
Volume275Pages:-
AbstractPolybrominated diphenyl ethers (PBDEs), a kind of flame retardants, were widely used in the furniture, textile and electronics industries. Because of their lipophilic, persistent and bio-accumulative properties, PBDEs were listed on the Stockholm Convention as typical persistent organic pollutants (POPs). We have previously reported that a highly active, quinone-type metabolite of PBDEs (PBDEQ) causes DNA damage and subsequently triggers apoptosis. However, it is remaining unclear whether PBDEQ provokes protein damage and stimulates corresponding signaling cascade. Using human normal liver (LO2) cells as an in vitro model, we demonstrated that PBDEQ causes oxidative protein damage through excess reactive oxygen species (ROS). Consistently, we found PBDEQ exposure causes the depletion of protein thiol group, the appearance of carbonyl group and the accumulation of protein aggregates. Endoplasmic reticulum (ER) stress was involved in the repair of oxidized proteins. Under the scenario of severe damage, LO2 cells degrade oxidized proteins through ubiquitin-proteasome system (UPS) and autophagy. The blockage of these protein degradation pathways aggravates PBDEQ-induced cytotoxicity in LO2 cells, whilst antioxidant N-acetyl-cysteine (NAC) rescues PBDEQ-induced oxidative protein damage conversely. In summary, our current study first demonstrated PBDEQ-induced protein oxidative damage in LO2 cells, which offer a better understanding of the cytotoxicity of PBDEs and corresponding metabolites. (C) 2021 Elsevier Ltd. All rights reserved.
Department环境化学与生态毒理学国家重点实验室
KeywordPBDEQ Protein oxidative damage Endoplasmic reticulum stress Ubiquitin-proteasome system Autophagy
WOS Research AreaEnvironmental Sciences
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/45816
Collection环境化学与生态毒理学国家重点实验室
Affiliation1.Southwest Univ, Coll Pharmaceut Sci, Key Lab Luminescence Anal & Mol Sensing, Minist Educ, Chongqing 400715, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China
Recommended Citation
GB/T 7714
Wang, Yuting,Xu, Lei,Peng, Lu,et al. Polybrominated diphenyl ethers quinone-induced intracellular protein oxidative damage triggers ubiquitin-proteasome and autophagy-lysosomal system activation in LO2 cells[J]. CHEMOSPHERE,2021,275:-.
APA Wang, Yuting.,Xu, Lei.,Peng, Lu.,Fang, Changyu.,Qin, Qi.,...&Song, Yang.(2021).Polybrominated diphenyl ethers quinone-induced intracellular protein oxidative damage triggers ubiquitin-proteasome and autophagy-lysosomal system activation in LO2 cells.CHEMOSPHERE,275,-.
MLA Wang, Yuting,et al."Polybrominated diphenyl ethers quinone-induced intracellular protein oxidative damage triggers ubiquitin-proteasome and autophagy-lysosomal system activation in LO2 cells".CHEMOSPHERE 275(2021):-.
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