(A) At 2 weeks after i.v. injection of 2.5 ×
106 GFP/luciferase-bearing MOLM13 cells, nude mice were randomized
and treated with EX, Ara-C (100 mg/kg i.p. every other day), or EX plus Ara-C for
3 weeks, and survival was estimated by Kaplan and Meier analysis as described in
Methods. (B) Noninvasive imaging of leukemia burden and progression.
(C) At 2 weeks after the start of treatment (4 weeks after
xenotransplantation), leukemia burden was quantitated noninvasively via
bioluminescence (BL) as described in Methods.