MAP3K2 and melanoma: lncRNA forkhead box D3 antisense RNA 1 (FOXD3-AS1) is overexpressed in melanoma and functions as oncogene by sponging miR-127-3p and miR-325 and upregulating their target genes four-jointed box kinase 1 (FJX1) and mitogen-activated protein kinase kinase kinase 2 (MAP3K2), respectively [119,120].