RELB and hepatocellular carcinoma: HCC tissues exhibited significantly higher levels of RelA (P = 1.62E − 12), RelB (P = 1.62E − 12), NF-κB1 (P = 0.012), and NF-κB2 (P = 1.62E − 12) expression (Figures 1(a), 1(b), 1(d), and 1(e)) than normal liver tissues.