NFKB1 and melanoma: As (i) there was no tight inverse correlation between the level of MITF-M and phosphorylated p65 in untreated melanoma cells, and (ii) PN simultaneously reduced levels of both MITF-M and phosphorylated p65, a suppressive role of the NF-κB signaling on MITF-M protein level seems not plausible, at least for some melanomas.