PARK7 and Parkinson disease: A comparable trend was observed in VTA neurons, where mitochondrial DJ-1 levels were the lowest in somata, medium levels in proximal neurites, and the highest in the distal neurites (NAc) in both control and PD cases [control somata: M = 78.175 ± 6.849, n = 9; proximal neurites: M = 99.453 ± 10.332, n = 9; NAc: M = 128.558 ± 10.369, n = 9; PD somata: M = 54.833 ± 5.267, n = 9; proximal neurites: M = 70.045 ± 6.381, n = 9; distal neurites (NAc): M = 106.844 ± 6.984, n = 10; Fig. 5B].