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• W4328108613 endingPage "116398" @default.
• W4328108613 startingPage "116398" @default.
• W4328108613 abstract "Cytochrome P3A4 (CYP3A4) is a crucial drug-metabolizing enzyme, and its expression is regulated by the pregnane X receptor (PXR), constitutive androstane receptor (CAR), steroid receptor coactivator 1 (SRC-1), and acetyltransferase P300. Panaxytriol is a naturally derived active substance extracted from the roots of Panax ginseng C. A. Mey. which is widely used clinically. Our previous studies have shown that panaxytriol induces CYP3A4 expression through PXR activation, which is antagonized by high CAR expression. However, the underlying mechanism remains unclear.This study aimed to investigate the mechanism of panaxytriol in inducing CYP3A4 expression via interactions between nuclear regulators and DNA response elements.Immunoprecipitation technique was used to assess the binding levels of PXR and CAR with the coactivators SRC-1 and P300 in HepG2 and Huh-7 cells. Furthermore, chromatin immunoprecipitation assay was used to investigate the PXR and CAR interaction with the CYP3A4 promoter response element ER-6/DR-3.The binding of PXR to SRC-1, P300, and the response elements ER-6 and DR-3 was improved with an increase in panaxytriol concentration (10-80 μM), and the binding affinity was further enhanced upon CAR silencing. The binding of CAR to SRC-1 and the response elements ER-6 and DR-3 was significantly higher at 80 μM panaxytriol, whereas no significant binding was observed between CAR and P300.Panaxytriol promoted the recruitment of PXR to SRC-1 and P300, binding to ER-6 and DR-3, and upregulating CYP3A4 expression. Furthermore, an interactive dialogue regulatory mechanism between PXR and CAR was observed." @default.
• W4328108613 created "2023-03-22" @default.
• W4328108613 creator A5008264216 @default.
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• W4328108613 date "2023-06-01" @default.
• W4328108613 modified "2023-10-16" @default.
• W4328108613 title "Panaxytriol upregulates CYP3A4 expression through the interaction between nuclear regulators and DNA response elements" @default.
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• W4328108613 doi "https://doi.org/10.1016/j.jep.2023.116398" @default.
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• W4328108613 hasPublicationYear "2023" @default.
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