As shown in Figure 4(d), after transfection of miR-6745 mimics, the relative luciferase activity in BC cells cotransfected with miR-6745 mimics and LINC01574-WT was significantly lower than that of BC cells cotransfected with NC mimics and LINC01574-WT remarkably, whereas the relative luciferase activity in BC cells cotransfected with miR-6745 mimics and LINC01574-MUT was not different from that of BC cells cotransfected with NC mimics and LINC01574-MUT. The gene discussed is MMUT; the disease is breast cancer.