- Discovery of a potent, highly selective, and orally bioavailable inhibitor of CDK8 through a structure-based optimisation
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CDK8 is deregulated in multiple types of human cancer and is viewed as a therapeutic target for the treatment of the disease. Accordingly, the search for small-molecule inhibitors of CDK8 is being intensified. Capitalising on our initial discovery of AU1-100, a potent CDK8 inhibitor yet with a limited degree of kinase selectivity, a structure-based optimisation was carried out, with a series of new multi-substituted pyridines rationally designed, chemically prepared and biologically evaluated. Such endeavour has culminated in the identification of 42, a more potent CDK8 inhibitor with superior kinomic selectivity and oral bioavailability. The mechanism underlying the anti-proliferative effect of 42 on MV4-11 cells was studied, revealing that the compound arrested the G1 cell cycle and triggered apoptosis. The low risk of hepato- and cardio-toxicity of 42 was estimated. These findings merit further investigation of 42 as a targeted cancer therapeutic.
- Yu, Mingfeng,Long, Yi,Yang, Yuchao,Li, Manjun,Teo, Theodosia,Noll, Benjamin,Philip, Stephen,Wang, Shudong
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- Discovery of Potent, Selective, and Orally Bioavailable Small-Molecule Modulators of the Mediator Complex-Associated Kinases CDK8 and CDK19
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The Mediator complex-associated cyclin-dependent kinase CDK8 has been implicated in human disease, particularly in colorectal cancer where it has been reported as a putative oncogene. Here we report the discovery of 109 (CCT251921), a potent, selective, and orally bioavailable inhibitor of CDK8 with equipotent affinity for CDK19. We describe a structure-based design approach leading to the discovery of a 3,4,5-trisubstituted-2-aminopyridine series and present the application of physicochemical property analyses to successfully reduce in vivo metabolic clearance, minimize transporter-mediated biliary elimination while maintaining acceptable aqueous solubility. Compound 109 affords the optimal compromise of in vitro biochemical, pharmacokinetic, and physicochemical properties and is suitable for progression to animal models of cancer.
- Mallinger, Aurélie,Schiemann, Kai,Rink, Christian,Stieber, Frank,Calderini, Michel,Crumpler, Simon,Stubbs, Mark,Adeniji-Popoola, Olajumoke,Poeschke, Oliver,Busch, Michael,Czodrowski, Paul,Musil, Djordje,Schwarz, Daniel,Ortiz-Ruiz, Maria-Jesus,Schneider, Richard,Thai, Ching,Valenti, Melanie,De Haven Brandon, Alexis,Burke, Rosemary,Workman, Paul,Dale, Trevor,Wienke, Dirk,Clarke, Paul A.,Esdar, Christina,Raynaud, Florence I.,Eccles, Suzanne A.,Rohdich, Felix,Blagg, Julian
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p. 1078 - 1101
(2016/02/23)
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- 2-AMINOPYRIDINE COMPOUNDS
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The invention provides novel substituted 2-aminopyridine compounds according to Formula (I), their manufacture and use for the treatment of hyperproliferative diseases such as cancer, inflammatory or degenerative diseases.
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Page/Page column 23
(2014/05/24)
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