Fig. 4

Co-exposing preloaded PC12 cells to reserpine and desipramine. The co-treatment also induced tracer release in the same mode as using reserpine alone. The release indices of either ¹⁸F-LMI1195 (left, n = 6 at each time point of both groups) or ¹³¹I-MIBG (right, n = 6 at each time point of both groups) reached significant differences compared to controls after 30 min. ***p < 0.001 vs. control group at the same time point; all data points presented as mean ± SD