GNE-4997 is a potent and selective inhibitor of the interleukin-2-inducible T-cell kinase (Ki: 0.09 nM). The correlation between the basicity of solubilizing elements in GNE-4997 and off-target antiproliferative effects decreases cytotoxicity.
Interleukin-2-inducible T cell kinase (ITK) is a non-receptor tyrosine kinase expressed in T cells, NKT cells and mast cells which plays a crucial role in regulating the T cell receptor (TCR), CD28, CD2, chemokine receptor CXCR4, and FcepsilonR-mediated signaling pathways. ITK inhibitors can be used for the treatment of inflammation and immune-mediated disorders. ITK inhibitor (N-[5-[[3-[(4-Acetylpiperazin-1-yl)carbonyl]-4-methyl-6-methoxy-phenyl]thio]thiazol-2-yl]-4-(N-1,2-dimethylpropylaminomethyl)benzamide) is the analogue of BMS-509744, which can potently and selectively inhibit Itk kinase activity.
In vitro: BMS-509744 could reduce TCR-induced functions including PLCγ1 tyrosine phosphorylation, calcium mobilization, IL-2 secretion, and T-cell proliferation in vitro in both human and mouse cells [1].
In vivo: BMS-509744 suppressed the production of IL-2 induced by anti-TCR antibody administered to mice. BMS-509744 also significantly diminishes lung inflammation in a mouse model of ovalbumin-induced allergy/asthma [1].
Clinical trial: Up to now, both BMS-509744 and ITK inhibitor is still in the preclinical development stage.
ITK/TRKA-IN-1 is a chemical compound that functions as a dual inhibitor of IL-2-inducible T-cell kinase (ITK) and tropomyosin receptor kinase A (TRKA). With an IC50 value of 1.0 nM, it effectively inhibits the activity of ITK, while demonstrating a remarkable 96% inhibition of TRKA.
ITK inhibitor 5 (compound 27) is a highly potent and selectively targeted inhibitor of ITK. It exhibits IC50 values of 5.6 nM and 25 nM for ITK and BTK respectively [1].