Figure 2. PCA alleviated dopaminergic neuronal loss in MPTP-intoxicated mice. (A) The levels of dopamine, DOPAC and HVA in the striatum were measured by HPLC. (B–C) Brain sections were immunostained for TH immunoreactivity in SN and TH positive cells were quantified. Scale bar, 50 μm. (D) Representative western blot bands and quantification of TH in each group. Data were expressed as mean ± S.D., n = 6; **P< 0.01,*P< 0.05 vs. control group; #P< 0.05 vs. MPTP group.