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• W1968403297 startingPage "2068" @default.
• W1968403297 abstract "The pregnane X receptor (PXR) initially isolated as a nuclear receptor regulating xenobiotic and drug metabolism and elimination, seems to play an endobiotic role by affecting lipid homeostasis. In mice, PXR affects lipid homeostasis and increases hepatic deposit of triglycerides. In this study, we show that, in human hepatocyte, PXR activation induces an increase of de novo lipogenesis through the up-regulation of S14. S14 was first identified as a thyroid-responsive gene and is known to transduce hormone-related and nutrient-related signals to genes involved in lipogenesis through a molecular mechanism not yet elucidated. We demonstrate that S14 is a novel transcriptional target of PXR. In addition, we report an increase of fatty acid synthase (FASN) and adenosine triphosphate citrate lyase genes expression after PXR activation in human hepatocyte, leading to an increase of fatty acids accumulation and de novo lipogenesis. RNA interference of the expression of S14 proportionally decreases the FASN induction, whereas S14 overexpression in human hepatic cells provokes an increase of fatty acids accumulation and lipogenesis. These results demonstrate for the first time that xenobiotic or drug-activated PXR promote aberrant hepatic de novo lipogenesis via activation of the nonclassical S14 pathway. In addition, these data suggest that the up-regulation of S14 by PXR may promote aberrant hepatic lipogenesis and hepatic steatosis in human hepatocytes." @default.
• W1968403297 created "2016-06-24" @default.
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• W1968403297 date "2009-02-11" @default.
• W1968403297 modified "2023-09-27" @default.
• W1968403297 title "A novel pregnane X receptor and S14-mediated lipogenic pathway in human hepatocyte" @default.
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• W1968403297 doi "https://doi.org/10.1002/hep.22907" @default.
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