D. SH-SY5Y cells in the lower chamber were cocultured with differentiated NT, c-src KD #1 or c-src KD #2/ A53T α-syn-EGFP OE SH-SY5Y cells for 12 h. The cells in the lower chamber were immunostained with anti-EGFP antibody. The intensity was analyzed. Values were derived from five independent experiments (n=5). *** P < 0.001 compared to NT cells, one-way ANOVA. 