Figure 7. miR-1228 targets and regulates MMP-14. (A) Dual-luciferase reporter assay confirmed that there were targeted binding sites between miR-1228 and MMP-14. (B) Relative expression of MMP-14 mRNA in gastric cancer cells (transfected with sh-MMP-14, si-MMP-14, si-NC, or sh-MMP-14+miR-1228-mimics) after co-culture with exosomes. (C) qRT-PCR quantitated relative expression of MMP-14in serum exosomes. (D) Pearson test analyzed the correlation between MMP-14 and miR-1228 in serum exosomes. (E, F) qRT-PCR and WB determined relative expression of MMP-14 mRNA and protein in gastric cancer cells (transfection with sh-MMP-14, si-MMP-14, si-NC or sh-MMP-14, miR-1228- mimics) after co-culture. aP< 0.05 vs. si-NC, bP< 0.01 vs. si-NC.