Fewer BrdU+ cells, GFAP+/BrdU+ cells, GFAP+ cells, DCX+/BrdU+ cells, and DCX+ cells were observed in the SVZ of PD mice compared to WT mice, indicating impaired adult neurogenesis in the SVZ of PD mice (Figure 7I-N, Figure S6). This evidence concerns the gene GFAP and Parkinson disease.