ILK and breast cancer: Next, miR-542-3p inhibitor was transfected into BC cells, and qRT-PCR and western blot assays manifested that ILK mRNA and protein expression were ascended significantly; circ_0000515 knockdown repressed the expression level of ILK in both RT-4 and RT-112 cells while miR-542-3p inhibitors could partially reverse the inhibitory effects of knocking down circ_0000515 on ILK expressions (Figure 5H–5J and Supplementary Figure 1).