Figure 2.
The combination of anti-PD-1 or anti-PD-L1 with a cell-depleting anti-CD4 mAb inhibits NB progression. (a) Kaplan-Meier analysis of A/J mice challenged i.v. with a tumorigenic dose of Neuro2a-luc cells on day 0 and then treated with anti-CD25 mAb alone or combined with anti-PD-1 mAb or with an irrelevant antibody, according to the schedule shown in the inset. Percentages of progression-free mice are indicated on the Y-axis and the fraction of progression-free mice of each group is given in brackets. (b) The combined treatment with anti-PD-1 or anti-PD-L1 and anti-CD4 mAb potently inhibits NB progression. P values of combined treatments vs irrelevant Ab controls are indicated (Wilcoxon log-rank test). The experiment shown is representative of two independent ones with identical results. Percentages of progression-free mice are indicated on the Y-axis and the fraction of progression-free mice of each group is given in brackets. (c) IVIS analysis representation of Neuro2a-luc NB development in mice receiving irrelevant Ab and combined treatments at the indicated time-points from challenge.