MYCN and neuroblastoma: To investigate the immunological features of human NB cells, we utilized a panel of human NB cell lines with MYCN amplification, i.e. IMR32, SMS-KAN, SK-N-BE2, CHP134, and SK-N-DZ, and 2 non-MYCN amplified cell lines as controls, i.e. CHLA-15 and -20 (Figure 1A).