(A) Neuroblastoma cell lines were reverse transfected with siRNAs (siELF4 and control) and their proliferation was monitored by live-cell imaging (IncuCyte). (B) Knockdown of ELF4 with siRNA results in a significant decrease in number of viable cells (MTS assay, 120 h post-transfection). (C) Silencing of ELF4 results in differentiation (neurite outgrowth, 120 h post-transfection). (D) ELF4 knockdown significantly diminishes the percentage of Ki67 positive cells (Ki67 quantification, 120 h post-transfection). (E) Loss of ELF4 induces apoptosis (Caspase-3/−7 assay, 48 h post-transfection). Statistical significance of observed differences was determined by Student’s t-test. Proliferation data was adjusted for multiple testing using a Bonferroni correction. * = p<0.05, ** = p<0.01, *** = p<0.001, **** = p<0.0001.