PPP1R1B and Huntington disease: Tukey post-hoc analysis revealed a significant reduction in NeuN- and DARPP-32 labeled cell densities in HD vehicle-control mice in comparison to the WT mice (p = 0.012, p = 0.002, respectively), but these differences were not seen between iPS-NSCs-treated HD and WT control groups (p = 0.35, p = 0.29, respectively), Moreover, the density of the DARPP-32 labeled cells was significantly elevated in iPS-NSCs-HD treated mice compared to HD vehicle controls (p = 0.047; Figures 4A,C,E).