E2F6 and glioblastoma: We observed that E2F6 knock-down in U-87 MG (Fig. 4A) and U-118 MG (Fig. 4B) had no impact on 4EBP1 mRNA and protein levels, eliminating E2F6 as a transcriptional regulator of EIF4EBP1 in these glioblastoma cell lines.