Crystal structures of complexes of vitamin D receptor ligand-binding domain with lithocholic acid derivatives
摘要:
The secondary bile acid lithocholic acid (LCA) and its derivatives act as selective modulators of the vitamin D receptor (VDR), although their structures fundamentally differ from that of the natural hormone 1 alpha,25-dihydroxyvitamin D-3 [1,25(OH)(2)D-3)]. Here, we have determined the crystal structures of the ligand-binding domain of rat VDR (VDR-LBD) in ternary complexes with a synthetic partial peptide of the coactivator MED1 (mediator of RNA polymerase II transcription subunit 1) and four ligands, LCA, 3-keto LCA, LCA acetate, and LCA propionate, with the goal of elucidating their agonistic mechanism. LCA and its derivatives bind to the same ligand-binding pocket (LBP) of VDR-LBD that 1,25(OH)(2)D-3 binds to, but in the opposite orientation; their A-ring is positioned at the top of the LBP, whereas their acyclic tail is located at the bottom of the LBP. However, most of the hydrophobic and hydrophilic interactions observed in the complex with 1,25(OH)(2)D-3 are reproduced in the complexes with LCA and its derivatives. Additional interactions between VDR-LBD and the C-3 substituents of the A-ring are also observed in the complexes with LCA and its derivatives. These may result in the observed difference in the potency among the LCA-type ligands.
The present invention provides a VDR ligand which does not induce hypercalcemia that is an adverse reaction of a vitamin D3 preparation; and a composition which comprises lithocholic acid propionate, a salt thereof, a solvate thereof, or a prodrug thereof.
US9278992B2
申请人:——
公开号:US9278992B2
公开(公告)日:2016-03-08
[EN] FUNCTION-SELECTIVE VITAMIN D RECEPTOR AGONIST<br/>[FR] AGONISTE DU RÉCEPTEUR DE LA VITAMINE D (VDR) SÉLECTIF DE LA FONCTION
申请人:UNIV NIHON
公开号:WO2008149563A1
公开(公告)日:2008-12-11
[EN] It is intended to provide a VDR ligand which does not induce hypercalcemia that is the side effect of a vitamin D3 preparation. A composition which contains lithocholic acid propionate, its salt or a solvate or prodrug of the same. [FR] La présente invention concerne un ligand du VDR qui n'induit pas d'hypercalcémie qui est l'effet secondaire d'une préparation de vitamine D3. L'invention concerne également une composition qui contient du propionate de l'acide lithocholique, son sel ou un solvate ou pro-médicament de celui-ci.
[EN] LITHOCHOLIC ACID DERIVATIVE HAVING VITAMIN D ACTIVITY<br/>[FR] DÉRIVÉ D'ACIDE LITHOCHOLIQUE AYANT UNE ACTIVITÉ VITAMINE D<br/>[JA] ビタミンD活性を有するリトコール酸誘導体