Journal
JOURNAL OF MEDICINAL CHEMISTRY
Volume 54, Issue 5, Pages 1314-1320Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jm101336m
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We report the biochemical characterization of sulfated polyhydroxy sterols isolated from marine invertebrates as potent antagonists of farnesoid-X-receptor (FXR), a ligand-regulated transcription factor involved in the regulation of lipid and glucose homeostasis in mammals. Molecular characterization of a library of sulfated polyhydroxysteroids resulted in the identification of a first FXR antagonist. In contrast to partial antagonists, this compound was endowed with an antagonistic activity on the expression of a subset of FXR-regulated genes in liver cells and abrogated the release of nuclear coreceptor from the promoter of these genes. The putative binding mode to FXR, obtained through docking calculations, suggested the crucial role played by the bent shape of the molecule as well as the presence of one hydroxyl group in its side chain. This compound is a major tool to explore the effect of FXR inhibition in pharmacological settings.
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