To investigate the impact of miR-29a, miR-29b, and miR-29c on B7-H3 regulation, we transfected the NB cell lines SK-N-BE(2)-C, SK-N-AS, CHLA-255 and SK-N-SH with miR-29a, miR-29b, miR-29c, and control mimics. This evidence concerns the gene CD276 and neuroblastoma.