MYC and breast cancer: To validate this hypothesis, the LncRNA SNHG15 downregulation vectors (Additional file 3: Figure S3A), miR-451 inhibitor (Additional file 3: Figure S3B) and c-Myc overexpression vectors (Additional file 3: Figure S3C, D) were successfully transfected into BC cells, which were divided into 4 groups, including control, LncRNA SNHG15 knock-down (KD-SNHG15), KD-SNHG15 + KD-miR-451 and KD-SNHG15 + OE-Myc.