qPCR analysis for the assessment of expression levels of different neural markers in 15 weeks COs: SOX2 and PAX6 (progenitor cells), TUBB3 (pan-neuronal) SLC17A6 and SLC17A7 (VGLUT2 and VGLUT1; glutamatergic neurons) and GAD1 and GAD2 (GAD67 and GAD65; GABAergic neurons). Y-axis indicates relative expression fold change. Data are represented as mean ± SEM. Statistical significance was determined using one-way ANOVA with Tukey's multiple comparisons test (WT: n=4 from 1 batch, KO: n=4 from 1 batch, W-AAV: n=4 from 1 batch). 