Our data indicate that the proliferation rate of radial-glia-like GFAP+ cells showed a statistically significant decrease in the WD group (Mdn = 10%, IQR: 8.5–10.1) as compared to controls (Mdn = 34%, IQR: 29–36; U = 0; P = 0.004). This evidence concerns the gene GFAP and Wilson disease.