Western blot analysis of NF-kB and pNF-kB. Protein expression of NF-kB and pNF-kB in BJ+ SK-MEL-28 co-culture treated with trametinib (25 nM) and celecoxib (50 nM). WB bands were analyzed by densitometry and results were normalized to GAPDH. The left panel illustrates WB bands (Ctrl = control, T = trametinib, C = celecoxib, T + C = trametinib + celecoxib), while right panels illustrate the quantitative analysis of WB results (1 = control, 2 = trametinib, 3 = celecoxib, 4 = celecoxib + trametinib). **** p < 0.0001 vs. control cells; **** p < 0.0001 vs. trametinib group. Each bar represents mean ± standard deviation (n = 3).