G-749

G-749 is an inhibitor of Fms-like tyrosine receptor kinase 3 (FLT3) with IC50 values ranging from 2.1 to 38.1 nM for wild-type and mutant (constitutively active) FLT3s in Ba/F3 cells expressing recombinant receptors. It also inhibits growth of human leukemia cell lines that express FLT3-ITD mutant kinase (IC50s = 3.5 and 7.5 nM for MV4-11 and Molm-14 cells, respectively) but has no effect on cells that lack FLT3 expression or that express wild-type FLT3. G-749 reduces tumor growth and increases survival in a dose-dependent manner in MV4-11 and Molm-14 murine leukemia xenograft models. It reduces...