Clifutinib

Clifutinib is a selective inhibitor of the FLT3-ITD mutation, exhibiting an IC50 of 15.1 nM. This compound demonstrates potent antiproliferative effects against FLT3-ITD acute myeloid leukemia (AML) cell lines, with IC50 values of 1.5 nM and 1.4 nM for MV-4-11 and MOLM-13, respectively. Clifutinib disrupts FLT3-ITD kinase activity, subsequently inhibiting downstream RAS/MAPK, PI3K/AKT, and JAK/STAT5 signaling pathways, leading to apoptosis in FLT3-ITD-positive AML cells. Additionally, it shows significant antitumor efficacy in mouse models bearing MV-4-11 or MOLM-13 xenografts, making it a valuable tool for investigating relapsed/refractory FLT3-ITD-positive AML.