Download MendeleyDiscovery and Optimization of Pyrazine Carboxamide AZ3246, a Selective HPK1 Inhibitor.
Shields, J.D., Baker, D., Balazs, A.Y.S., Bommakanti, G., Casella, R., Cao, S., Cook, S., Escobar, R.A., Fawell, S., Gibbons, F.D., Giblin, K.A., Goldberg, F.W., Gosselin, E., Grebe, T., Hariparsad, N., Hatoum-Mokdad, H., Howells, R., Hughes, S.J., Jackson, A., Karapa Reddy, I., Kettle, J.G., Lamont, G.M., Lamont, S., Li, M., Lill, S.O.N., Mele, D.A., Metrano, A.J., Mfuh, A.M., Morrill, L.A., Peng, B., Pflug, A., Proia, T.A., Rezaei, H., Richards, R., Richter, M., Robbins, K.J., San Martin, M., Schimpl, M., Schuller, A.G., Sha, L., Shen, M., Sheppeck 2nd, J.E., Singh, M., Stokes, S., Song, K., Sun, Y., Tang, H., Wagner, D.J., Wang, J., Wang, Y., Wilson, D.M., Wu, A., Wu, C., Wu, D., Wu, Y., Xu, K., Yang, Y., Yao, T., Ye, M., Zhang, A.X., Zhang, H., Zhai, X., Zhou, Y., Ziegler, R.E., Grimster, N.P.(2025) J Med Chem 68: 4582-4595
- PubMed: 39928839
- DOI: https://doi.org/10.1021/acs.jmedchem.4c02631
- Primary Citation of Related Structures:
9H8D, 9H8E, 9H8F - PubMed Abstract:
Hematopoietic progenitor kinase 1 (HPK1) is a negative regulator of the T cell receptor signaling pathway and is therefore a target of interest for immunooncology. Nonselective HPK1 inhibitors may affect other kinase components of T cell activation, blunting the beneficial impact of enhanced T cell activity that results from HPK1 inhibition itself. Here, we report the discovery of pyrazine carboxamide HPK1 inhibitors and their optimization through structure-based drug design to afford a highly selective HPK1 inhibitor, compound 24 (AZ3246). This compound induces IL-2 secretion in T cells with an EC 50 of 90 nM without inhibiting antagonistic kinases, exhibits pharmacokinetic properties consistent with oral dosing, and demonstrates antitumor activity in the EMT6 syngeneic mouse model.
- Early Oncology R&D, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States.
Organizational Affiliation:
