CSPG4 and spinal cord injury: Due to the heterogeneity of used promoters, inconsistent findings are reported regarding the involvement of PCs in fibrotic scar formation and tissue repair: the participation of type 1 PCs (NG2+/Nestin−) was described in scar formation after spinal cord injury (SCI) using constitutive Nestin-GFP/NG2-dsRed transgenic mice (Birbrair et al., 2014).