Finally, we found that selective, partial inhibition of Itk using Soquelitinib reduced basal CD69 expression in CAR-Jurkat cells while maintaining their ability to activate in response to antigen. These data suggest that TCRζ determines the pY signalling profile and that Itk drives basal activation of CD19-CAR Jurkats, which may impact evaluation of new CAR designs in CAR-Jurkat screens.
Finally, we find that selective, partial inhibition of Itk using Soquelitinib reduces basal CD69 expression in Jurkat CAR T cells while maintaining their ability to activate in response to antigen. Our data suggest that the ζ-chain determines the pY signalling profile of CD19-CAR Jurkat T cells and that Itk may drive antigen-independent CD19-CAR activation.
This specificity and optimization hold potential for the development of next-generation ITK inhibitors with possible applications in the treatment of immune-related disorders and cancers. Further in vitro, in vivo, and translational clinical research are called for.
10 months ago
Journal
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IL2 (Interleukin 2) • ITK (IL2 Inducible T Cell Kinase)
Moreover, ITK-deficient CD19-CAR-T cells showed better control of tumor relapse. Our work provides a promising strategy of targeting ITK to develop sustainable CAR-T products for clinical use.