(A-C) Total summed PDGFRa, Olig2, and MBP mRNA+ cell counts for CTX, STR, CC, HC, TH, MB, CB, and BS brain regions. (D) Quantification of mRNA+ cells at 1-week post-treatment timepoint (7 weeks of age) and (E) at 4-week post ASPA re-expression timepoint (10 weeks of age). Two-way ANOVA with multi-comparison correction, CI 99%, mean ±SD, ns = not significant, * p<0.0332; ** p<0.0021, *** p<0.0002, **** p<0.0001. Abbr.: platelet-derived growth factor receptor alpha (PDGFRa), oligodendrocyte transcription factor 2 (Olig2), myelin basic protein (MBP).