Previous studies showed that miR-214 inhibits breast cancer cell proliferation and negatively regulates Wnt/β-catenin signaling in breast cancer [32], and miR-214-3p promotes the proliferation of osteosarcoma cells by targeting CADM1 [33], which indicates that miR-214 is indeed involved in the regulation of cell proliferation. The gene discussed is CADM1; the disease is breast cancer.