When these cell lines were treated with 7.0 μM CPZ for 72 h, CPZ drastically (more than 90%) inhibited the growth and survival of MV4-11 and HMC-1 but showed only marginal (0–40%) inhibitory effects on leukemia cell lines with FLT3 WT/KIT WT (Fig. 2c). Here, FLT3 is linked to leukemia.