National Center for
3AZ1: Crystal Structure Analysis Of Vitamin D Receptor
Bioorg. Med. Chem. (2011) 19 p.4721-4729
Novel vitamin D(3) analogs with carboxylic acid were explored, focusing on a nonsecosteroidal analog, LG190178, with a bisphenyl skeleton. From X-ray analysis of these analogs with vitamin D receptor (VDR), the carboxyl groups had very unique hydrogen bonding interactions in VDR and mimicked 1alpha-hydroxy group and/or 3beta-hydroxy group of 1alpha,25-dihydroxyvitamin D(3). A highly potent analog, 6a, with good in vitro activity and pharmacokinetic profiles was identified from an SAR study. Compound 6a showed significant prevention of bone loss in a rat osteoporosis model by oral administration.