TRPM2 and Parkinson disease: In the SNc, 82.9% of the cells were allocated in cluster 1 and 17.1% in cluster 2 for the TRPM2+/+ group; 97.2% of the cells were allocated in cluster 1 and 2.8% in cluster 2 for the TRPM2+/− group; 87.5% of the cells were allocated in cluster 1 and 12.5% in cluster 2 for the TRPM2−/− group; 10% of the cells were allocated in cluster 1 and 90% in cluster 2 for the TRPM2+/+ PD group; 65.2% of the cells were allocated in cluster 1 and 34.8% in cluster 2 for the TRPM2+/− PD group; 81.8% of the cells were allocated in cluster 1 and 18.2% in cluster 2 for the TRPM2−/− PD group.