Prophylactic ozone administration reduces renal ischemia-reperfusion injury in the rat

Background: The objective of this study was to examine the role of ozone oxidative preconditioning after renal IR (ischemia reperfusion) injury. Methods: Twenty-eight Wistar rats were randomized into four groups: sham operated (S), IR, ozone (O), and O+IR. The S group was administered physiological saline (PS) intraperitoneally (i.p.) for seven days. The IR group was subjected to renal ischemia for 1 h by occlusion of the left renal artery and vein, followed by reperfusion for 2 h. The O group was administered ozone i.p. for seven days. In the O+IR group, ozone was administered i.p. for seven days before the IR procedure. IR injury (as in the IR group) was induced on the eight day. Laboratory analyses of renal tissue samples for superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and malondialdehyde (MDA) were performed. Results: The total oxidant score (TOS) and total antioxidant capacity (TAC) of the blood samples were also analyzed. The degree of renal injury was highest in the IR group. In the O+IR group, renal injury was decreased. The antioxidant parameters were increased in the O group. The oxidant parameters were highest in the IR group. Conclusion: Ozone preconditioning ameliorated renal IR injury, with a significant decrease observed in the renal IR injury score.