C. NT or c-src KD #1 or #2 /A53T α-syn-EGFP and A53T α-syn-mCherry OE SH-SY5Y cells were cocultured with 50 μM RA for 5 days. The samples were observed under confocal microscopy, and the number of cells containing double fluorescence labeled puncta were analyzed. Values were derived from five independent experiments (n=5). *** P < 0.001 compared to PBS or NT cells, one-way ANOVA. 