CHEK2 and neuroblastoma: To determine the mechanisms that are responsible for GSK2830371-induced apoptosis in NB cells, we checked the expression levels of Chk2 (T68), p53 (S15), and p38 (Thr180/Tyr182) in IMR-32, SH-SY5Y and SK-N-AS cells after GSK2830371 treatment.