D, E, H&E and IHC analysis (Ki67 and Caspase-3) of PDX (BE 564T) tumors after the treatment (D). Quantification of the IHC data for the positivity of Ki-67 and Caspase-3 are shown in (E). *P<0.05 and **P<0.01 by two-way ANOVA with Tukey's multiple comparisons test. Data are shown as mean ± SD (error bar) of three independent experiments (n=3). 