Dendritic cells (DC) phagocytose neuromelanin (NM). Cells were cultured for 48 h in the absence (A, C) or presence (B, D) of neuromelanin (NM) and analyzed by differential interference contrast (DIC) microscopy. A, B: Overview of cultures. C, D: z-stack analysis of a single DC from bottom to top. Z-stack distances were 0.70-0.80 μm.