IKBKB and oral cavity squamous cell carcinoma: miR-199a 5p was found to function as a tumor suppressor in oral squamous cell carcinoma via targeting the inhibitor of nuclear factor kappa-B kinase subunit beta (IKKβ)/NF-κB signaling pathway [117], which is quite interesting as IKKβ/NF-κB has generally been reported to promote tumorigenesis [259,260,261,262].