Back Door Modulation of the Farnesoid X Receptor: Design, Synthesis, and Biological Evaluation of a Series of Side Chain Modified Chenodeoxycholic Acid Derivatives
摘要:
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.
Back Door Modulation of the Farnesoid X Receptor: Design, Synthesis, and Biological Evaluation of a Series of Side Chain Modified Chenodeoxycholic Acid Derivatives
摘要:
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.
BILE ACID DERIVATIVES AS FXR LIGANDS FOR THE PREVENTION OR TREATMENT OF FXR-MEDIATED DISEASES OR CONDITIONS
申请人:Pellicciari Roberto
公开号:US20100063018A1
公开(公告)日:2010-03-11
The present invention relates to compounds of formula (I)
wherein:
R
1
is hydrogen or an alkyl group;
R
2
is hydrogen or a halogen, nitro, alkyloxy, amino or carboxy group;
Y is CH
2
, oxygen or sulfur;
n is an integer from 1 to 4, and pharmaceutically acceptable salts, solvates or amino acid conjugates thereof for the treatment of FXR-mediated diseases or conditions.
Back Door Modulation of the Farnesoid X Receptor: Design, Synthesis, and Biological Evaluation of a Series of Side Chain Modified Chenodeoxycholic Acid Derivatives
作者:Roberto Pellicciari、Antimo Gioiello、Gabriele Costantino、Bahman M. Sadeghpour、Giovanni Rizzo、Udo Meyer、Derek J. Parks、Antonio Entrena-Guadix、Stefano Fiorucci
DOI:10.1021/jm060294k
日期:2006.7.1
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.