Certain bile acids find use in the pharmaceutical industry. In view of the wide distribution of serious diseases such as HIV, AIDS and Bovine Spongiform Encephalopathy (BSE) it is desirable to avoid—as far as practicable—to have any components of animal origin in medicaments in order to eliminate any danger of infection. The present invention relates to a method of providing bile acids from non-animal starting materials.
27-Nor-Δ4-dafachronic acid is a synthetic ligand of Caenorhabditis elegans DAF-12 receptor
作者:Gisela A. Samaja、Olga Castro、Lautaro D. Alvarez、María V. Dansey、Daiana S. Escudero、Adriana S. Veleiro、Adalí Pecci、Gerardo Burton
DOI:10.1016/j.bmcl.2013.03.071
日期:2013.5
27-Nor-Delta(4)-dafachronic acid was prepared in nine steps and 14% overall yield by two sequential 2-carbon homologations from 20 beta-carboxyaldehyde-4-pregnen-3-one. Its activity was evaluated in vivo, where it rescued the Mig phenotype of daf-9(rh50) Caenorhabditis elegans mutants and restored their normal resistance to oxidative stress. 27-Nor-Delta(4)-dafachronic acid was also able to directly bind and activate DAF-12 in a transactivation cell-based luciferase reporter assay, although it was less active than the corresponding 25R-and 255 dafachronic acids. The binding mode of the 27-Nor steroid was studied by molecular dynamics using a homology model of the CeDAF-12 receptor. (C) 2013 Elsevier Ltd. All rights reserved.