Fig. 4.
Progenitor proliferation in the dentate gyrus (DG) after 4 h of isoflurane (iso) in 16-month-old rats. Bromodeoxyuridine (BrdU) (50 mg/kg) was injected twice with a 12-h interval 4 days after 4 h of isoflurane (n = 6) or no isoflurane (control, n = 6). Immunocytochemical staining of bromodeoxyuridine+ cells (arrows in A, main image 4×, inset 20× objective) of every twelfth coronal section of the hippocampus and quantification of every bromodeoxyuridine+ cell (B) revealed no difference between groups (P > 0.2, Mann–Whitney U test).