Expression of XPO1 in NB. (A) Comparison of XPO1 levels in normal adrenal gland (AG), neural crest (NC), and NB show significantly higher levels in NB (P = 3.0e-35; one-way ANOVA). (B) Analysis of XPO1 expression demonstrate higher expression levels in NB compared to acute lymphoblastic (ALL) and acute myeloid leukemia (AML), rhabdoid tumor (RT), or Wilms’ tumor (WT; P < 0.001; Kruskal-Wallis test). (C) (D) Survival analysis of 649 patients with NB published by Kocak et al.27 by their XPO1 expression. Using an expression cutoff of 13,893, patients fare worse if they have high XPO1 expression levels. Log-rank test with Bonferroni correction. (E) Drug sensitivity assays with 7 human and one murine NB line (NSX-2). Intermediate responders are marked in blue and good responders in red; mean values and standard deviation of technical triplicates. One set of two biological replicates is shown. The graphs in subpanel C and D were generated using the r2 platform (https://hgserver1.amc.nl/cgi-bin/r2/main.cgi).