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Published on: June 23, 2019
Discovery of pyrazole-based selective covalent ITK inhibitors with In vivo activity
1State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen, 518055, China.
None:
Interleukin-2 inducible T-cell kinase (ITK) plays a major role in T cell signaling downstream of the T cell receptor (TCR) and is a promising therapeutic target for inflammatory diseases and T cell-related blood cancers. Herein, a novel series of covalent ITK inhibitors was developed using a structure-based design. The optimized compound 19 demonstrated potent ITK inhibitory activity and effectively suppressed downstream protein phosphorylation as well as IL-2 secretion in Jurkat cells. It exhibits exceptional selectivity over BTK and other structurally related kinases. Moreover, compound 19 significantly inhibited IL-2 production in both a washout cellular assay and an anti-CD3 mAb-challenged mouse model, with sustained effects superior to its reversible counterpart. Thus, compound 19 represents a valuable tool for the further exploration of the potential benefits of ITK inhibition in basic and translational research.
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