27-Nor-Δ4-dafachronic acid is a synthetic ligand of Caenorhabditis elegans DAF-12 receptor
摘要:
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.
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.