(A) Approximately 3-day treatment of Ba/F3.p210 cells with LCL161, imatinib, or a combination of LCL161+imatinib. Calcusyn-derived combination indices are shown in Table 1. (B–D) In vivo bioluminescence imaging study. Male NCr nude mice were administered, via tail vein injection, approximately 800,000 Ba/F3-FLT3-ITD-luc+ cells. 32 mice were injected with 32D-p210-LucNeo cells and imaged 3 days later to determine tumor burden. Following randomization, mice were divided into 4 treatment groups (n=8). Treatments were carried out via oral gavage 5X per week for a total of 3 weeks. Mice were imaged every 4–8 days and time-to-sac was recorded. Mice were administered vehicle, nilotinib at 20mg/kg 1X daily, LCL161 at 100mg/kg 1X daily, or a combination of nilotinib+LCL161. (B) Plotted bioluminescence values for entire study. (C) Plotted bioluminescence values on Day 17 of treatment (p=0.0002, ANOVA). (D) Survival curve (p < 0.0001, ANOVA).