PIK3CA and melanoma: As shown in Figure 2, in several melanoma cell lines tested, including M14, UACC62, A-375 and, again, NPA cells, dually suppressing the MAPK and PI3K/Akt pathways by U0126 and Akti IV showed synergistic/additive effects on the expression of most of the iodide-handling genes compared with suppressing either pathway alone.