However, the fraction of dividing OPCs (% NG2+/PCNA+ among total NG2+) was significantly increased, while that of non-dividing OPCs was significantly decreased in the lysolecithin-induced demyelination during pregnancy when compared to those seen in either virgin or postpartum rats (p < 0.05, Fig. 2G,H). The gene discussed is PCNA; the disease is Peripheral demyelination.