期刊
JOURNAL OF MEDICINAL CHEMISTRY
卷 49, 期 14, 页码 4208-4215出版社
AMER CHEMICAL SOC
DOI: 10.1021/jm060294k
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Carbamate derivatives of bile acids were synthesized with the aim of systematically exploring the potential for farnesoid X receptor (FXR) modulation endowed with occupancy of the receptor's back door, localized between loops H1-H2 and H4-H5. Since it was previously shown that bile acids bind to FXR by projecting the carboxylic tail opposite the transactivation function 2 (AF-2, helix 12), functionalization of the side chain is not expected to interfere directly with the orientation of H12 but can result in a more indirect way of receptor modulation. The newly synthesized compounds were extensively characterized for their ability to modulate FXR function in a variety of assays, including the cell-free fluorescence resonance energy transfer (FRET) assay and the cell-based luciferase transactivation assay, and displayed a broad range of activity from full agonism to partial antagonism. Docking studies clearly indicate that the side chain of the new derivatives fits in a so far unexploited receptor cavity localized near the back door of FXR. We thus demonstrate the possibility of achieving a broad FXR modulation without directly affecting the H12 orientation.
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