Effect of ODN2006 stimulation on cell viability and pro-inflammatory cytokines production in PIG1 melanocytes. After serum starvation for 24 h, PIG1 melanocytes were treated with ODN2006 at different concentrations (1, 5, 10 µM) for 72 h, and then subjected to respective detection. (a) The cell viability of PIG1 melanocytes was assessed using MTT assay. (b) The levels of TNF-α, IL-6, and IL-8 in PIG1 melanocytes were assessed using commercial ELISA kits