Abstract：
:Tetrabromobisphenol A (TBBPA) can cause diverse adverse effects including neurotoxicity. Emerging TBBPA derivatives, with high structure similarity to the parent compound, are now being concerned. In this study, the potential neurotoxicities of four TBBPA derivatives and their parent compound were studied by cell viability inhibition in rat pheochromocytoma cells (PC12) and the corresponding molecular mechanisms were investigated. The cellular toxicity was correlated with the chemical hydrophobicity. Tetrabromobisphenol A bis(2-hydroxyethyl ether) (TBBPA-BHEE) exhibited the highest cellular toxicity to PC12 due to its lowest hydrophobicity among these 5 tested compounds. Further experiments showed that TBBPA-BHEE disturbed dopamine (DA) secretion and altered acetylcholinesterase (AChE) enzymatic activity in PC12 cells. The molecular mechanism study indicated that TBBPA-BHEE induced cellular toxicity to PC12 cells through ROS-mediated caspase activation to a large extent, which was partially attenuated by the anti-oxidation of Vitamin E. Moreover, in contrast to TBBPA, the occurrence of TBBPA-BHEE toxicity to PC12 was not attributed to activation of mitogen-activated protein kinases (MAPKs) or thyroid hormone (TH) signaling pathway. These findings suggest TBBPA derivatives, especially TBBPA-BHEE, as potential neurotoxins need urgent attention.
journal_name
Chemospherejournal_title
Chemosphereauthors
Liu Q,Ren X,Long Y,Hu L,Qu G,Zhou Q,Jiang Gdoi
10.1016/j.chemosphere.2016.03.117subject
Has Abstractpub_date
2016-07-01 00:00:00pages
194-203eissn
0045-6535issn
1879-1298pii
S0045-6535(16)30441-6journal_volume
154pub_type
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