Treatment with combination of TMZ and Val-083 increases survival in mice. A, Quantification of the ratio of luminescence emission by U251-MG in ex vivo-treated brain slices after 7 days as compared with the initial. Plots represent the fold change compared with the DMSO control. Statistical test: t test (P values: *, P < 0.05; **, P < 0.01; ***, P < 0.001; ns, nonsignficant); P values on top of the boxes are comparison over the DMSO control. B, Kaplan–Meier curve showing the survival proportions of mice transplanted with U-251 MG cells and treated with TMZ, Val-083, or the combination of both. Log-rank P values: **, P < 0.01; ns, nonsignificant). C, Kaplan–Meier curve showing the survival proportions of mice transplanted with H676 cells and treated with TMZ, Val-083, or the combination of both. Log-rank P values: **, P < 0.01; ns, nonsignificant).