Aurora Isoform Selectivity: Design and Synthesis of Imidazo[4,5-B]Pyridine Derivatives as Highly Selective Inhibitors of Aurora-A Kinase in Cells.Bavetsias, V., Faisal, A., Crumpler, S., Brown, N., Kosmopoulou, M., Joshi, A., Atrash, B., Perez-Fuertes, Y., Schmitt, J.A., Boxall, K.J., Burke, R., Sun, C., Avery, S., Bush, K., Henley, A., Raynaud, F.I., Workman, P., Bayliss, R., Linardopoulos, S., Blagg, J.
(2013) J Med Chem 56: 9122
- PubMed: 24195668
- DOI: https://doi.org/10.1021/jm401115g
- Primary Citation of Related Structures:
- PubMed Abstract:
Aurora-A differs from Aurora-B/C at three positions in the ATP-binding pocket (L215, T217, and R220). Exploiting these differences, crystal structures of ligand-Aurora protein interactions formed the basis of a design principle for imidazo[4,5-b]pyridine-derived Aurora-A-selective inhibitors. Guided by a computational modeling approach, appropriate C7-imidazo[4,5-b]pyridine derivatization led to the discovery of highly selective inhibitors, such as compound 28c, of Aurora-A over Aurora-B. In HCT116 human colon carcinoma cells, 28c and 40f inhibited the Aurora-A L215R and R220K mutants with IC50 values similar to those seen for the Aurora-A wild type. However, the Aurora-A T217E mutant was significantly less sensitive to inhibition by 28c and 40f compared to the Aurora-A wild type, suggesting that the T217 residue plays a critical role in governing the observed isoform selectivity for Aurora-A inhibition. These compounds are useful small-molecule chemical tools to further explore the function of Aurora-A in cells.
Cancer Research UK Cancer Therapeutics Unit, Division of Cancer Therapeutics, The Institute of Cancer Research , London SM2 5NG, United Kingdom.