AMG 925 is a dual inhibitor of FMS-related tyrosine kinase 3 (FLT3) and cyclin-dependent kinase 4 (Cdk4; IC50s = 1 and 3 nM, respectively). It is selective for FLT3 and Cdk4 over Cdk1 (IC50 = 2.22 μM). AMG 925 also binds to FLT3ITD, FLT3D835Y, FLT3D835H, FLT3K663Q, and FLT3N841I (Kds = 1-4 nM). It inhibits proliferation of MOLM-13, COLO 205, and U937 cancer cells (IC50s = 19, 55, and 52 nM, respectively). AMG 925 (50, 75, and 150 mg/kg) reduces intratumor levels of pSTAT5 and pRb and inhibits tumor growth in a MOLM-13 acute myeloid leukemia (AML) mouse xenograft model.
