RBFOX3 and Parkinson disease: Lastly, we stained for neuronal nuclei (NeuN) to check the cell viability and our results showed that our vaccines increased the number for NeuN-stained cells in both the striatum and the SNpc and the protein expression of postsynaptic density protein 95 (PSD-95) was decreased in the PD model, while it was increased in the vaccinated model (Supplementary Figure S5).