作者:Jo Waaler、Ruben G. G. Leenders、Sven T. Sowa、Shoshy Alam Brinch、Max Lycke、Piotr Nieczypor、Sjoerd Aertssen、Sudarshan Murthy、Albert Galera-Prat、Eddy Damen、Anita Wegert、Marc Nazaré、Lari Lehtiö、Stefan Krauss
DOI:10.1021/acs.jmedchem.0c00208
日期:2020.7.9
Tankyrases 1 and 2 are central biotargets in the WNT/beta-catenin signaling and Hippo signaling pathways. We have previously developed tankyrase inhibitors bearing a 1,2,4-triazole moiety and binding predominantly to the adenosine binding site of the tankyrase catalytic domain. Here we describe a systematic structure-guided lead optimization approach of these tankyrase inhibitors. The central 1,2,4-triazole template and trans-cyclobutyl linker of the lead compound 1 were left unchanged, while side-group East, West, and South moieties were altered by introducing different building blocks defined as point mutations. The systematic study provided a novel series of compounds reaching picomolar IC50 inhibition in WNT/beta-catenin signaling cellular reporter assay. The novel optimized lead 13 resolves previous atropisomerism, solubility, and Caco-2 efflux liabilities. 13 shows a favorable ADME profile, including improved Caco-2 permeability and oral bioavailability in mice, and exhibits antiproliferative efficacy in the colon cancer cell line COLO 320DM in vitro.