Binding and Activity of Tetrabromobisphenol A Mono-Ether Structural Analogs to Thyroid Hormone Transport Proteins and Receptors
文献类型：期刊论文
| 作者 | Ren, Xiao-Min; Yao, Linlin; Xue, Qiao; Shi, Jianbo; Zhang, Qinghua; Wang, Pu; Fu, Jianjie ; Zhang, Aiqian; Qu, Guangbo; Jiang, Guibin
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| 刊名 | ENVIRONMENTAL HEALTH PERSPECTIVES
 |
| 出版日期 | 2020-10 |
| 卷号 | 128期号:10页码:1-10 |
| ISSN号 | 0091-6765 |
| 英文摘要 | BACKGROUND: Tetrahromohisphenol A (TBBPA) mono-ether structural analogs, identified as the by-products or transformation products of commercial TBBPA bis-ether derivatives, have been identified as emerging widespread pollutants. However, there is very little information regarding their toxicological effects. OBJECTIVE: We aimed to explore the potential thyroid hormone (TH) system disrupting effect of TBBPA mono-ether structural analogs. METHODS: The binding potencies of chemicals toward human TH transport proteins [transthyretin (TTR) and thyroxine-binding globulin (TBG)] and receptors [TR alpha ligand-binding domain (LBD) and TRI beta-LBD] were determined by fluorescence competitive binding assays. Molecular docking was used to simulate the binding modes of the chemicals with the proteins. The cellular TR-disrupting potencies of chemicals were assessed by a GH3 cell proliferation assay. The intracellular concentrations of the chemicals were measured by high-performance liquid chromatography and mass spectrometry. RESULTS: TBBPA mono-ether structural analogs hound to TER with half maximal inhibitory concentrations ranging from 0.1 mu M to 1.0 mu M but did not hind to TBG. They also hound to both subtypes of TR-LBDs with 20% maximal inhibitory concentrations ranging from 4.0 mu M to 50.0 mu M. The docking results showed that the analogs lit into the ligand-binding pockets of TTR and TR-LBDs with binding modes similar to that of TBBPA. These compounds likely induced GH3 cell proliferation via TR [with the lowest effective concentrations (LOECs) ranging from 0.3 mu M to 2.5 mu M] and further enhanced TB-induced GH3 cell proliferation (with LOECs ranging from 0.3 mu M to 1.2 mu M). Compared with TBBPA, TBBPA-mono(2,3 dihromopropyl ether) showed a 4.18-fold higher GH3 cell proliferation effect and 105-fold higher cell membrane transportation ability. CONCLUSION: This study provided a possible mechanism underlying the difference in TTR or TR binding by novel TBBPA structural analogs. These compounds might exert TH system disrupting effects by disrupting TH transport in circulation and TR activity in TB-responsive cells. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/44616]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Ren, Xiao-Min,Yao, Linlin,Xue, Qiao,et al. Binding and Activity of Tetrabromobisphenol A Mono-Ether Structural Analogs to Thyroid Hormone Transport Proteins and Receptors[J]. ENVIRONMENTAL HEALTH PERSPECTIVES,2020,128(10):1-10. |
| APA | Ren, Xiao-Min.,Yao, Linlin.,Xue, Qiao.,Shi, Jianbo.,Zhang, Qinghua.,...&Jiang, Guibin.(2020).Binding and Activity of Tetrabromobisphenol A Mono-Ether Structural Analogs to Thyroid Hormone Transport Proteins and Receptors.ENVIRONMENTAL HEALTH PERSPECTIVES,128(10),1-10. |
| MLA | Ren, Xiao-Min,et al."Binding and Activity of Tetrabromobisphenol A Mono-Ether Structural Analogs to Thyroid Hormone Transport Proteins and Receptors".ENVIRONMENTAL HEALTH PERSPECTIVES 128.10(2020):1-10. |
入库方式： OAI收割
来源：生态环境研究中心
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