The intensity of α-synuclein positive cells (Figure 6 and Figure S5 with lower magnification 200×) in control, MPTP-PD, TUDCA, Syndopa, and TUDCA + Syndopa groups was found to be 6.06%, 75.80%, 49.28%, 55.08%, and 47.40%. Here, SNCA is linked to Parkinson disease.