YBX1 and squamous cell carcinoma: In A375 and A875 melanoma and squamous cell carcinoma A431 cells, LL-37 (at a dose of 0.05 μg/mL over 24 or 48 h) stimulated migration through the expression of Y-box binding protein-1 (YB-1) and nuclear factor-κB (NF-κB) [35,36].