Furthermore, recent research in cancer cell lines suggested that some miRNAs, such as miR-133b and miR-20b-5p, can inhibit the epithelial-mesenchymal transition (EMT) induced by TGF-β1 by targeting, respectively, TGFBR1 and TGFBR2 genes (41,42). Here, TGFB1 is linked to cancer.