CD274 and melanoma: TG or HA15-stimulated melanoma cells were pre-treated with NF-κB inhibitor BAY-11-7085, which revealed that the increased expressions of PD-L1 at either mRNA, protein or membrane level were all prominently suppressed by the inhibition of NF-κB in both A2058 and A375 cell lines (Additional file 1: Fig. S12H-J).