Expression of TNF-α and TNF receptor in the PC 12 hr-post SE. (A) TNF-α immunoreactivity in Ox-42-positive microglia (arrows). (B) TNFp55R expression in astrocytes (arrows). (C-D) TNFp75R expression in astrocytes as well as endothelial cells (arrows). Bar = 25 (A-D) μm.