TP53 and neuroblastoma: In addition, we tested YM155 in nutlin-3-resistant, TP53 mutant sub-lines of two clonal p53 wild-type UKF-NB-3 sub-lines (UKF-NB-3clone1, UKF-NB-3clone3) and the TP53 wild-type neuroblastoma cell line UKF-NB-6 (Figure 3, Table S5).