ArticleFrontiers in immunology2026
Resveratrol ameliorates intrahepatic cholestasis of pregnancy by modulating the gut-liver axis and FXR-mediated bile acid homeostasis.
Article in Frontiers in immunology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Objective: Intrahepatic cholestasis of pregnancy (ICP) is a liver disorder with limited treatment options. This study investigated the therapeutic potential of resveratrol (RES) and its underlying mechanisms, focusing on the gut-liver axis and bile acid metabolism in an estrogen-induced ICP rat model. Methods: Pregnant rats were randomized into Sham, ICP (induced by 17β-estradiol), and ICP+RES (15, 30, 60 mg/kg) groups. Systemic and hepatic inflammation, liver function, histopathology, and intestinal barrier integrity were assessed. Hepatic bile acid profiles were analyzed by UHPLC-MS/MS, and gut microbiota was evaluated by 16S rRNA sequencing. The role of gut microbiota was further examined via fecal microbiota transplantation (FMT) in pseudogerm-free rats. Key proteins in the FXR signaling pathway were analyzed by Western blotting. Results: RES treatment dose-dependently alleviated ICP manifestations, including reducing serum levels of total bile acids, total bilirubin, and liver enzymes (AST, ALT, ALP), while mitigating systemic and hepatic inflammation. It also restored intestinal barrier integrity and corrected gut microbiota dysbiosis. FMT from RES-treated donors recapitulated these therapeutic effects in recipient ICP rats. Furthermore, RES reversed the hepatic bile acid imbalance by reducing primary bile acids and increasing beneficial secondary bile acids. Mechanistically, RES upregulated the expression of FXR and its downstream targets, including SHP, BSEP, UGT2B4, and CYP1A1. Conclusion: RES effectively ameliorated ICP through multi-faceted mechanisms involving the attenuation of inflammation, restoration of gut microbiota and intestinal barrier, and correction of bile acid homeostasis via activation of the FXR signaling pathway. Our findings highlight RES as a promising multi-mechanistic therapeutic candidate for ICP.
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