Immunoreactivity for GLUT8 is localized in the cytoplasm of subependymal glial cells in autopsied human brains. Immunoreactivity for GLUT8 is mainly localized in subependymal vimentin-positive glial cells. Immunoreactivity for GLUT8 is sometimes localized in GFAP-positive astrocytes and CD68- or HLA-DR-positive microglial cells.