In HER2+ BC, our data revealed regulation of RPL23 by hsa-miR-17-3p and hsa-miR-200b-3p, regulation of ALDOC and CACNB1 by hsa-miR-18a-3p, regulation of ACACA by hsa-miR-200b-3p and regulation of ERBB2 by hsa-miR-18a-5p. The gene discussed is CACNB1; the disease is breast cancer.