Radotinib

Radotinib(IY-5511) is a novel and selective BCR-ABL1 tyrosine kinase inhibitor with IC50 of 34 nM for wild-type BCR-ABL1 kinase. IC50 value: 34 nM [1] Target: BCR-ABL1 inhibitor Radotinib is a BCR-ABL1 specific 2nd-generation tyrosine kinase inhibitor. According to recently conducted in vitro kinase assays, the IC50 value for radotinib against wild-type BCR-ABL1 kinase was 34 nM, which is relatively lower compared with the IC50 levels of c-kit (1,324 nM), PDGFR (PDGFRα, 75.5 nM; PDGFRβ, 130 nM) and src (>2,000 nM). Also, radotinib effectively inhibited the proliferation of common mutant clones of BCR-ABL1, with the exception of T315I. In an off-target kinase assay to assess safety, DDR, EPHB, LYN, and PDGFR kinases were inhibited below the 180 nM level.

[1]Kim SH, et al. Efficacy and safety of radotinib in chronic phase chronic myeloid leukemia patients with resistance or intolerance to BCR-ABL1 tyrosine kinase inhibitors. Haematologica. 2014 Jul;99(7):1191-6.