Figure 4. Extra-cellular dopamine (DA) content as determined by HPLC assay.
After cells were exposed to UVB light (120 mJ/cm2) or non-UVB light and post-cultured for 24 h, cell culture medium from melanoma A375 cells (A) and SK-MEL-28 cells (B), dopaminergic neuronal SH-SY5Y cells (C) and PC12 cells (D) with or without α-Syn expression were subjected to HPLC assay for measuring DA level. *: p<0.05 as compared to its non-UVB control (a) or non-α-Syn control (b). Dox = doxycycline.