Fragment-based discovery of hydroxy-indazole-carboxamides as novel small molecule inhibitors of Hsp90

Indazole fragments were identified by a fragment based approach and optimized by SBDD using information from X-ray structures of ligands bound to the molecular chaperone Hsp90. Optimization of these high μM binders resulted in 3-benzylindazole derivatives with significantly improved affinity. Inhibi...

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Veröffentlicht in:Bioorganic & medicinal chemistry letters 2012-07, Vol.22 (13), p.4396-4403
Hauptverfasser: Buchstaller, Hans-Peter, Eggenweiler, Hans-Michael, Sirrenberg, Christian, Grädler, Ulrich, Musil, Djordje, Hoppe, Edmund, Zimmermann, Astrid, Schwartz, Harry, März, Joachim, Bomke, Jörg, Wegener, Ansgar, Wolf, Michael
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container_end_page 4403
container_issue 13
container_start_page 4396
container_title Bioorganic & medicinal chemistry letters
container_volume 22
creator Buchstaller, Hans-Peter
Eggenweiler, Hans-Michael
Sirrenberg, Christian
Grädler, Ulrich
Musil, Djordje
Hoppe, Edmund
Zimmermann, Astrid
Schwartz, Harry
März, Joachim
Bomke, Jörg
Wegener, Ansgar
Wolf, Michael
description Indazole fragments were identified by a fragment based approach and optimized by SBDD using information from X-ray structures of ligands bound to the molecular chaperone Hsp90. Optimization of these high μM binders resulted in 3-benzylindazole derivatives with significantly improved affinity. Inhibitors of the Hsp90 molecular chaperone are showing considerable promise as potential molecular therapeutic agents for the treatment of cancer. Here we describe the identification of novel small molecular weight inhibitors of Hsp90 using a fragment based approach. Fragments were selected by docking, tested in a biochemical assay and the confirmed hits were crystallized. Information gained from X-ray structures of these fragments and other chemotypes was used to drive the fragment evolution process. Optimization of these high μM binders resulted in 3-benzylindazole derivatives with significantly improved affinity and anti-proliferative effects in different human cancer cell lines.
doi_str_mv 10.1016/j.bmcl.2012.04.121
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subjects Amides - chemistry
Amides - toxicity
Anti-cancer drug
Binding Sites
Biological and medical sciences
Cancer
Cell Line, Tumor
Cell Survival - drug effects
Chaperones
chemotypes
Computer Simulation
Crystallography, X-Ray
Docking
Drug Evaluation, Preclinical
Evolution
Fragments
Heat shock protein 90
Hsp90
HSP90 Heat-Shock Proteins - antagonists & inhibitors
HSP90 Heat-Shock Proteins - metabolism
Hsp90 protein
Humans
Indazoles
Indazoles - chemistry
Ionizing radiation
Medical sciences
molecular chaperones
Molecular weight
Pharmacology. Drug treatments
Protein Structure, Tertiary
Small Molecule Libraries - chemistry
Small Molecule Libraries - toxicity
Structure-Activity Relationship
Tumor cell lines
X-radiation
X-ray structure
title Fragment-based discovery of hydroxy-indazole-carboxamides as novel small molecule inhibitors of Hsp90
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