CPT1A and melanoma: In melanoma, DC cells through the Wnt5a-β-catenin-PPAR-γ signaling pathway can upregulate the expression of carnitine palmitoyltransferase-1a (CPT1A) fatty acid transporter protein, drive the FAO process, promote the development of Tregs, inhibit the activation of effector T cells, and establish immune privilege sites (79).