TERT and neuroblastoma: Moreover, treating TERT-negative neuroblastoma cells with two other EZH2 inhibitors (UNC1999 and PF-06821497 acetate) induced the expression of TERT (Supplementary Fig. S7A and S7B), confirming the role of PCR2 complex in repressing TERT locus in neuroblastoma cells with long telomeres.