Abstract
The potential activities of phthalate esters (PAEs) that interfere with the endocrine system have been focused recently. However, information on modulating the glucocorticoid receptor (GR) of PAEs is scarce. Our aim was to evaluate the agonistic / antagonistic properties of PAEs on human GR. Luciferase reporter gene assay revealed that the tested chemicals displayed no agonistic effects but dicyclohexyl phthalate (DCHP) exerted antagonistic activity in a dose-responsive manner for GR in HeLa cells. The effects of DCHP on dexamethasone (DEX)-induced GR nuclear translocation and gene expression of glucocorticoid-responsive gene expression (G6Pase, PEPCK, FAS, GILZ and MKP-1), as well as protein expression of G6Pase and PEPCK were further examined by RT-qPCR and western blot analysis. DCHP antagonized DEX-induced GR nuclear translocation and suppressed gene expression in both mRNA and protein levels. Furthermore, the results of molecular docking and molecular dynamics simulation showed that DCHP could bind to GR and exhibited potential regulation on this target protein. Collectively, we demonstrate that DCHP may act as a GR antagonist in vitro and is considered to exert endocrine effects via human GR.
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Funding
This work was supported by the National Natural Science Foundation of China (31701349 and U19A2035), the Science and Technology Development Project Foundation of Jilin Province (20200403063SF), 2021 the Agricultural Science and Technology Innovation Program of Jilin Province, and Science and technology project of traditional Chinese medicine in Jilin Province (2021100).
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YL, TL and YS designed and performed the experiments. YL, TL and YW wrote the paper. WH, CL and JC analyzed the data.
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Leng, Y., Sun, Y., Huang, W. et al. Identification of dicyclohexyl phthalate as a glucocorticoid receptor antagonist by molecular docking and multiple in vitro methods. Mol Biol Rep 48, 3145–3154 (2021). https://doi.org/10.1007/s11033-021-06303-2
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DOI: https://doi.org/10.1007/s11033-021-06303-2