KW-2449 is a novel multikinase inhibitor, which suppresses the growth of leukemia cells with FLT3 mutations or T315I-mutated BCR/ABL translocation. Recent research showed that HDACIs increase KW-2449 lethality in Bcr/Abl(+) cells in association with inhibition of Bcr/Abl, generation of ROS, and induction of DNA damage. This strategy preferentially targets primary Bcr/Abl(+) hematopoietic cells and exhibits enhanced in vivo activity. Combining KW-2449 with HDACIs warrants attention in IM-resistant Bcr/Abl(+) leukemias. (source: Clin Cancer Res. 2011 May 15;17(10):3219-32. Epub 2011 Apr 7.).對FLT3，ABL，ABLT315I和 Aurora kinase 的 IC50 值分別為6.6，14，4 和 48 nM。