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The pregnane X receptor drives sexually dimorphic hepatic changes in lipid and xenobiotic metabolism in response to gut microbiota in mice

Abstract : Background: The gut microbiota-intestine-liver relationship is emerging as an important factor in multiple hepatic pathologies, but the hepatic sensors and effectors of microbial signals are not well defined. Results: By comparing publicly available liver transcriptomics data from conventional vs. germ-free mice, we identified pregnane X receptor (PXR, NR1I2) transcriptional activity as strongly affected by the absence of gut microbes. Microbiota depletion using antibiotics in Pxr +/+ vs Pxr-/-C57BL/6J littermate mice followed by hepatic transcriptomics revealed that most microbiota-sensitive genes were PXR-dependent in the liver in males, but not in females. Pathway enrichment analysis suggested that microbiota-PXR interaction controlled fatty acid and xenobiotic metabolism. We confirmed that antibiotic treatment reduced liver triglyceride content and hampered xenobiotic metabolism in the liver from Pxr +/+ but not Pxr-/male mice. Conclusions: These findings identify PXR as a hepatic effector of microbiota-derived signals that regulate the host's sexually dimorphic lipid and xenobiotic metabolisms in the liver. Thus, our results reveal a potential new mechanism for unexpected drug-drug or food-drug interactions.
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https://hal.inrae.fr/hal-03209709
Contributor : Hélène Lesur <>
Submitted on : Tuesday, April 27, 2021 - 2:03:01 PM
Last modification on : Tuesday, June 22, 2021 - 12:40:02 PM

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Sharon Barretto, Frédéric Lasserre, Marine Huillet, Marion Régnier, Arnaud Polizzi, et al.. The pregnane X receptor drives sexually dimorphic hepatic changes in lipid and xenobiotic metabolism in response to gut microbiota in mice. Microbiome, BioMed Central, 2021, 9, ⟨10.1186/s40168-021-01050-9⟩. ⟨hal-03209709⟩

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