ALW-II-41-27 is an RG-25 (RG25) structural analog that exhibits enhanced type II kinase inhibitor activity against ephrin type-A receptor 2/EphA2/ECK (IC50 = 11 nM vs 770 nM with NG25) by targeting the ATP-binding pocket and an allosteric site next to the “DFG” motif. ALW-II-41-27 inhibits constitutive and ephrin A1-induced EphA2 tyrosine phosphorylation (0.1-1 μM; H358), effectively suppressing EphA2-dependent cancer survival in vitro (0.1-1 μM for 72 hrs; NSCLC) and xenograft tumor growth in mice in vivo (15-30 mg/kg b.i.d. i.p.; H358 NSCLC & A375 melanoma). Note: ALW-II-41-27 and RG-25 (RG25) display very similar kinase-targeting profiles with EphA2 being a notable exception, RG25 can therefore serve as a control for ALW-II-41-27 when probing EphA2-mediated cellular functions.
Type II ATP-competitive EphA2 inhibitor that inhibits EphA2 tyrosine phosphorylation and EphA2-dependent NSCLC survival in vitro and in vivo.
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