期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 182, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2019.109427
关键词
BDE-47; Metabolomics; Neurotoxicity; Glutamate metabolism; Pyrimidine metabolism
资金
- National Key Research and Development Program of China [2017YFC1600500]
- National Natural Science Foundation of China [21677103, 21876116]
- Sanming Project of Medicine in Shenzhen [SZSM201811070]
- Shenzhen Science and Technology Innovation Commission [JCYJ20160428143724235, JCYJ20170413102320786]
Polybrominated diphenyl ethers (PBDEs) as potential neurotoxicants in environment may possess hazards to human health. Previous studies have reported that PBDEs exposure could induce oxidative stress and disturb mitochondrial functions in mammalian cells. However, the toxicological mechanism remains to be clarified. In this work, the neurotoxic effect and underlying mechanism of 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) was investigated by using human neuroblastoma SK-N-SH cells as an effective model. A liquid chromatography-mass spectrometry (LC-MS)-based metabolomics approach combined with cell viability assay was applied to elucidate the metabolic perturbations and relevant toxicological pathways upon BDE-47 exposure. Our results shown that the SK-N-SH cell viability decreased in a dose-dependent manner after exposure to BDE-47 at 24 h within the concentration range of 5-250 mu M, and an IC50 value of 88.8 mu M was obtained. Based on the dose-response curve and cell morphological observation, the 5 and 10 mu M BDE-47 doses (equal to IC5 and IC10, respectively) were used for metabolomics study to capture the sensitive metabolic response following BDE-47 exposure. After BDE-47 treatment, nine metabolites were identified as potential biomarkers, and the most disturbed metabolic pathways were mainly involved in alanine, aspartate and glutamate metabolism, glutathione metabolism, tyrosine and phenylalanine metabolism, and pyrimidine metabolism, which imply that metabolic changes related to neurotransmitters, oxidative stress, and nucleotide-mediated signal transduction systems were the sensitive pathways mostly influenced. Our findings reported here may provide potential neurotoxic effect biomarkers and prompt deep understanding of the molecular and metabolic mechanisms triggered by BDE-47 exposure.
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