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Discovery and Optimization of 2‑Arylquinazolin-4-ones into a Potent and Selective Tankyrase Inhibitor Modulating Wnt Pathway Activity

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posted on 20.08.2019 by Hans-Peter Buchstaller, Uwe Anlauf, Dieter Dorsch, Daniel Kuhn, Martin Lehmann, Birgitta Leuthner, Djordje Musil, Daniela Radtki, Claudio Ritzert, Felix Rohdich, Richard Schneider, Christina Esdar
Tankyrases 1 and 2 (TNKS1/2) are promising pharmacological targets that recently gained interest for anticancer therapy in Wnt pathway dependent tumors. 2-Aryl-quinazolinones were identified and optimized into potent tankyrase inhibitors through SAR exploration around the quinazolinone core and the 4′-position of the phenyl residue. These efforts were supported by analysis of TNKS X-ray and WaterMap structures and resulted in compound 5k, a potent, selective tankyrase inhibitor with favorable pharmacokinetic properties. The X-ray structure of 5k in complex with TNKS1 was solved and confirmed the design hypothesis. Modulation of Wnt pathway activity was demonstrated with this compound in a colorectal xenograft model in vivo.

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