STAMBP and melanoma: To investigate the effect of DB-14 exosomes on cell survival, RAW 264.7 cells and B16F10 melanoma cells were simultaneously treated with LPS, α-MSH (200 nM), and DB-14 exosomes (4.44 × 108, 8.88 × 108, 1.78 × 109, 3.55 × 109, and 7.10 × 109 particles/ml), followed by the MTT assay.