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Fig. 3. Effect of Rac1 inhibition on kidney I/R. Mice were subjected to either 25 min of ischemia or sham operation. Some mice were administered either NSC23766 (10 mg/kg body weight) or 0.9% NaCl (vehicle) daily beginning 3 days before the operation. Kidneys and blood were harvested 4 and 24 h after the operation. (A-D) Twenty-four hours after the operation, kidney sections were subjected to immunohistochemical staining using anti-F4/80 (A, B) and -Rac1 (C, D) antibodies. Hematoxylin was used to visualize the nuclei of cells. Insert is at high magnification of the dash-lined rectangle. Arrows indicate F4/80- or Rac1-positive cells. Images were obtained from the outer medulla. F4/80-positive cells were counted in the outer medulla. Scale bar = 50 µm. (E, F) Kidney sections taken 24 h after the operation were stained with Periodic Acid-Schiff (PAS) and damage was scored. Scale bar = 50 µm. (G) Plasma creatinine (PCr) levels were measured at indicated times. Results are expressed as mean ± SEM (n = 4–5). *p < 0.05. Rac1, Ras-related C3 botulinum toxin substrate 1; I/R, ischemia/reperfusion; OM, outer medulla; ns, no significance; Isch, ischemia; NSC, NSC23766; V, vehicle.
Korean J Physiol Pharmacol 2023;27:257-265
© Korean J Physiol Pharmacol