Collin F. Regan

Novel potent dual inhibitors of CK2 and Pim kinases with antiproliferative activity against cancer cells.

A novel family of potent dual inhibitors of CK2 and the Pim kinases was discovered by modifying the scaffolds of tricyclic Pim inhibitors. Several analogs were active at single digit nanomolar IC(50) values against CK2 and the Pim isoforms Pim-1 and Pim-2. The molecules displayed antiproliferative activity in various cell phenotypes in the low micromolar and submicromolar range, providing an excellent starting point for further drug discovery optimization.

Synthesis and SAR of inhibitors of protein kinase CK2: Novel tricyclic quinoline analogs

Protein kinase CK2 is a potential drug target for many diseases including cancer and inflammation disorders. The crystal structure of clinical candidate CX-4945 1 with CK2 revealed an indirect interaction with the protein through hydrogen bonding between the NH of the 3-chlorophenyl amine and a water molecule. Herein, we investigate the relevance of this hydrogen bond by preparing several novel tricyclic derivatives lacking a NH moiety at the same position. This SAR study allowed the discovery of highly potent CK2 inhibitors.