Immunohistochemical staining of U87 glioblastoma with primary anti-Ki-67 antibody indicates that tumor tissue of the vehicle-treated group is characterized by the pronounced proliferative activity, expressing in a large amount of Ki-67-positive cells in the tumor structure with a numerical density of 62.3 ± 2.9 in the square unit of tumor section (Figures 7B, C). Here, MKI67 is linked to neoplasm.