Using SH-SY5Y neuroblastoma cells, transfectable with miR mimics, we demonstrated that PDGFRA protein expression decreased by about 30% with miR-34c-5p mimic and by 99.96 and 32% with miR-200a-3p and miR-200b-3p mimics, respectively. The gene discussed is PDGFRA; the disease is neuroblastoma.