Article
作者: Bommakanti, Gayathri ; Robbins, Kevin J. ; Zhou, Yanxiao ; Hatoum-Mokdad, Holia ; Cook, Steve ; Li, Min ; Yao, Tieguang ; Morrill, Lucas A. ; Wilson, David M. ; Hariparsad, Niresh ; Stokes, Stephen ; Schuller, Alwin G. ; Jackson, Anne ; Schimpl, Marianne ; Wu, Chengyan ; Shen, Minhui ; Giblin, Kathryn A. ; Sheppeck, James E. ; Lamont, Gillian M. ; Mele, Deanna A. ; Metrano, Anthony J. ; Ye, Minwei ; Grebe, Tyler ; Richards, Ryan ; Gosselin, Eric ; Cao, Shenggen ; Proia, Theresa A. ; Wagner, David J. ; Goldberg, Frederick W. ; Lamont, Scott ; Kettle, Jason G. ; Yang, Yue ; Sha, Li ; Zhai, Xiang ; Pflug, Alexander ; Karapa Reddy, Iswarya ; Peng, Bo ; Xu, Kevin ; Zhang, Andrew X. ; Escobar, Randolph A. ; Sun, Yuanyuan ; Tang, Haoran ; Balazs, Amber Y. S. ; Wu, Allan ; Ziegler, Robert E. ; Howells, Rachel ; Shields, Jason D. ; Lill, Sten O. Nilsson ; Baker, David ; Grimster, Neil P. ; Zhang, Hui ; Wu, Dedong ; Song, Kun ; Wang, Jianyan ; Fawell, Stephen ; Casella, Robert ; Rezaei, Hadi ; Singh, Meha ; Hughes, Samantha J. ; San Martin, Maryann ; Mfuh, Adelphe M. ; Gibbons, Francis D. ; Richter, Magdalena ; Wang, Yanjun ; Wu, Ye
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 EC50 of 90 nM without inhibiting antagonistic kinases, exhibits pharmacokinetic properties consistent with oral dosing, and demonstrates antitumor activity in the EMT6 syngeneic mouse model.