TPX-0131

TPX-0131 is a potent, selective, CNS-penetrant and orally active inhibitor of wild-type ALK (IC50 of 1.4 nM) and ALK-resistant mutation, e.g. G1202R (IC50 of 0.3 nM), L1196M (IC50 of 0.3 nM). TPX-0131 has strong antitumor activities[1].

Research Areas >> Cancer

Signaling Pathways >> Protein Tyrosine Kinase/RTK >> ALK

IC50: 1.4 nM (Wild-typr AKT); 0.2-6.6 nM (mutant ALK variants)[1]

TPX-0131 potently inhibits wild-type ALK (IC50 = 1.4 nM) and 26 ALK resistance mutations. TPX-0131 inhibits C1156Y, E1210K/S1206C, L1198F/C1156Y, L1196M/L1198F, E1210K, L1196M, T1151M, deleted G1202, S1206R, G1202R/L1198F, F1174L, F1245C, R1275Q, and G1202R ALK mutations with IC50 values of <1 nM. TPX0131 has IC50 values of 1-2 nM for the following ALK mutations: L1198F, L1152R, F1174S, T1151-L1152 insT, V1180L, G1269A, F1174C. TPX-0131 is less active against ALK mutations including I1171N, L1152P, D1203N, D1203N/E1210K, and G1269S, with IC50 values of 2-7 nM[1]. TPX-0131 is a potent inhibitor of ALK autophosphorylation in Ba/F3 cells expressing EML4-ALK G1202R solvent front, EML4-ALK G1202R/L1196M, or EML4-ALK G1202R/L1198F mutations, with IC50 values of approximately 3-10 nM[1].

TPX-0131 (2-10 mg/kg; p.o.; twice a day; for 2 weeks) treatment at 2 mg/kg, 5 mg/kg, and 10 mg/kg resulted in dose-dependent tumor growth inhibition (TGI) of 64%, 120%, and 200% (complete regression), respectively[1]. Animal Model: Female SCID/beige mice (5-8 weeks old) bearing Ba/F3 cells[1] Dosage: 2 mg/kg, 5 mg/kg, and 10 mg/kg Administration: p.o.; twice a day; for 2 weeks Result: Caused complete tumor regression in ALK mutation-dependent xenograft models.

[1]. Brion W Murray, et al. TPX-0131, a Potent CNS-Penetrant, Next-Generation Inhibitor of Wild-Type ALK and ALK-Resistant Mutations. Mol Cancer Ther. 2021 Jun 22;molcanther.0221.2021.