RGMB and head and neck squamous cell carcinoma: We further confirmed the direct binding of miR-93-5p to the 3'UTR of RGMB mRNA using the luciferase reporter assay (Fig. 5D and 5E) and validated the dysregulation of RGMB protein by miR-93-5p using a panel of SCCHN cell lines (Fig. 5F).