ACTA1 and melanoma: α-Smooth muscle actin (α-SMA), the expression of which positively influences metastatic potential, and integrin-α4, whose expression is related to enhanced metastasis, were also expressed at higher levels in both A375LM3IF4g/Luc (1.4- and 1.7-fold, respectively) and A375LM5IF4g/Luc (1.7- and 2.6-fold, respectively) melanoma cells (Figure 1B) [29,30].