Discovery of novel CDK1 inhibitors by combining pharmacophore modeling, QSAR analysis and in silico screening followed by in vitro bioassay

Cyclin-dependent kinase 1 (CDK1) is a valid anticancer target. With this in mind we applied a modeling workflow by combining pharmacophore modeling and QSAR analysis followed by in silico screening towards the discovery of novel inhibitory CDK1 scaffolds. Virtual screening identified 10 low micromolar inhibitory leads: 8 from the National Caner Institute (NCI) list of compounds and 2 from our in house list of established drugs and agrochemicals. The most potent NCI hit illustrated anti-CDK1 IC50 value of 0.83 mu M, while the drug hit isoxsuprine illustrated anti-CDK1 IC50 value of 2.9 mu M and the agrochemical hit foramsulfuran showed IC50 = 3.6 mu M. These results demonstrate that our virtual screening protocol is able to identify novel anti-CDK1 leads for subsequent development into potential anticancer agents. (C) 2010 Elsevier Masson SAS. All rights reserved.