LFB staining revealed significantly higher AOD values in STAT5B-overexpressing PD mice (PD+AAV-MAG-OE-STAT5B) compared to the PD+AAV-MAG-OE-NC group (Figure 7A,B), indicating the restoration of myelin integrity following STAT5B overexpression. The gene discussed is STAT5B; the disease is Parkinson disease.