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==Potent and selective Aldo-Keto Reductase 1C3 (AKR1C3) inhibitors based on the benzoisoxazole moiety: Application of a Bioisosteric Scaffold Hopping Approach to Flufenamic acid== | |||
<StructureSection load='6f78' size='340' side='right' caption='[[6f78]], [[Resolution|resolution]] 1.30Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[6f78]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6F78 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6F78 FirstGlance]. <br> | |||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=CVN:4-[[3,5-bis(trifluoromethyl)phenyl]amino]-1,2-benzoxazol-3-one'>CVN</scene>, <scene name='pdbligand=NAP:NADP+NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NAP</scene></td></tr> | |||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">AKR1C3, DDH1, HSD17B5, KIAA0119, PGFS ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6f78 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6f78 OCA], [http://pdbe.org/6f78 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6f78 RCSB], [http://www.ebi.ac.uk/pdbsum/6f78 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6f78 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[[http://www.uniprot.org/uniprot/AK1C3_HUMAN AK1C3_HUMAN]] Catalyzes the conversion of aldehydes and ketones to alcohols. Catalyzes the reduction of prostaglandin (PG) D2, PGH2 and phenanthrenequinone (PQ) and the oxidation of 9-alpha,11-beta-PGF2 to PGD2. Functions as a bi-directional 3-alpha-, 17-beta- and 20-alpha HSD. Can interconvert active androgens, estrogens and progestins with their cognate inactive metabolites. Preferentially transforms androstenedione (4-dione) to testosterone. | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The aldo-keto reductase 1C3 (AKR1C3) isoform plays a vital role in the biosynthesis of androgens and is considered an attractive target in prostate cancer (PCa). No AKR1C3-targeted agent has to date been approved for clinical use. Flufenamic acid and indomethacine are non-steroidal anti-inflammatory drugs known to inhibit AKR1C3 in a non-selective manner as COX off-target effects are also observed. Recently, we employed a scaffold hopping approach to design a new class of potent and selective AKR1C3 inhibitors based on a N-substituted hydroxylated triazole pharmacophore. Following a similar strategy, we designed a new series focused around an acidic hydroxybenzoisoxazole moiety, which was rationalised to mimic the benzoic acid role in the flufenamic scaffold. Through iterative rounds of drug design, synthesis and biological evaluation, several compounds were discovered to target AKR1C3 in a selective manner. The most promising compound of series (6) was found to be highly selective (up to 450-fold) for AKR1C3 over the 1C2 isoform with minimal COX1 and COX2 off-target effects. Other inhibitors were obtained modulating the best example of hydroxylated triazoles we previously presented. In cell-based assays, the most promising compounds of both series reduced the cell proliferation, prostate specific antigen (PSA) and testosterone production in AKR1C3-expressing 22RV1 prostate cancer cells and showed synergistic effect when assayed in combination with abiraterone and enzalutamide. Structure determination of AKR1C3 co-crystallized with one representative compound from each of the two series clearly identified both compounds in the androstenedione binding site, hence supporting the biochemical data. | |||
Potent and selective aldo-keto reductase 1C3 (AKR1C3) inhibitors based on the benzoisoxazole moiety: application of a bioisosteric scaffold hopping approach to flufenamic acid.,Pippione AC, Carnovale IM, Bonanni D, Sini M, Goyal P, Marini E, Pors K, Adinolfi S, Zonari D, Festuccia C, Wahlgren WY, Friemann R, Bagnati R, Boschi D, Oliaro-Bosso S, Lolli ML Eur J Med Chem. 2018 Apr 25;150:930-945. doi: 10.1016/j.ejmech.2018.03.040. Epub , 2018 Mar 16. PMID:29602039<ref>PMID:29602039</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
<div class="pdbe-citations 6f78" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Human]] | |||
[[Category: Friemann, R]] | |||
[[Category: Goyal, P]] | |||
[[Category: Wahlgren, W Y]] | |||
[[Category: Akr1c3]] | |||
[[Category: Aldo-keto reductase 1c3]] | |||
[[Category: Bioisosterism]] | |||
[[Category: Crpc]] | |||
[[Category: Inhibitor]] | |||
[[Category: Oxidoreductase]] | |||
[[Category: Prostate cancer]] | |||
[[Category: Scaffold hopping]] | |||