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- W2024771105 abstract "BackgroundAn increasing number of studies are reporting the existence of polybrominated diphenyl ethers (PBDEs) and their hydroxylated (HO) and methoxylated (MeO) metabolites in the environment and in tissues from wildlife and humans.ObjectiveOur aim was to characterize and compare the agonistic and antagonistic activities of principle PBDE congeners and their HO and MeO metabolites against human nuclear hormone receptors.MethodsWe tested the hormone receptor activities of estrogen receptor α (ERα), ERβ, androgen receptor (AR), glucocorticoid receptor (GR), thyroid hormone receptor α1 (TRα1), and TRβ1 against PBDE congeners BDEs 15, 28, 47, 85, 99, 100, 153, and 209, four para-HO-PBDEs, and four para-MeO-PBDEs by highly sensitive reporter gene assays using Chinese hamster ovary cells.ResultsOf the 16 compounds tested, 6 and 2 showed agonistic activities in the ERα and ERβ assays, respectively, and 6 and 6 showed antagonistic activities in these assays. 4′-HO-BDE-17 showed the most potent estrogenic activity via ERα/β, and 4′-HO-BDE-49 showed the most potent anti estrogenic activity via ERα/β. In the AR assay, 13 compounds showed antagonistic activity, with 4′-HO-BDE-17 in particular inhibiting AR-mediated transcriptional activity at low concentrations in the order of 10−8 M. In the GR assay, seven compounds, including two HO-PBDEs and two MeO-PBDEs, showed weak antagonistic activity. In the TRα1 and TRβ1 assays, only 4-HO-BDE-90 showed weak antagonistic activity.ConclusionsTaken together, these results suggest that PBDEs and their metabolites might have multiple endocrine-disrupting effects via nuclear hormone receptors, and para-HO-PBDEs, in particular, possess more potent receptor activities compared with those of the parent PBDEs and corresponding para-MeO-PBDEs." @default.
- W2024771105 created "2016-06-24" @default.
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- W2024771105 date "2009-08-01" @default.
- W2024771105 modified "2023-10-02" @default.
- W2024771105 title "Nuclear Hormone Receptor Activity of Polybrominated Diphenyl Ethers and Their Hydroxylated and Methoxylated Metabolites in Transactivation Assays Using Chinese Hamster Ovary Cells" @default.
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- W2024771105 doi "https://doi.org/10.1289/ehp.0900753" @default.
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