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Introduction. Kidney ischemia-reperfusion (I/R) injury is the main cause of delayed graft function in solid organ transplantation. Sonchus oleraceus is a plant with well-known antioxidant and anti-inflammatory activities; however, its effects on renal I/R are unknown. Objective. To evaluate whether S. oleraceus extract (S.O.e.) has nephroprotective activity in an I/R model in Wistar rats. Materials and Methods. Animal groups (n=6): sham, I/R (45 min/15 h), S.O.e (300 mg/kg p.o.), and S.O.e + I/R (300 mg/kg, p.o.; 45 min/15 h). Renal function, proinflammatory cytokines, alanine aminotransferase, markers of oxidative stress, and histology were evaluated. Results. None of the mediators evaluated differed significantly between the S.O.e and sham groups. Levels of blood urea nitrogen (BUN), creatinine, malondialdehyde (MDA), and proinflammatory cytokines were higher, and superoxide dismutase (SOD) was lower in the I/R group than in the sham group. Histology showed tubular epithelial necrosis in the medulla and cortex in the I/R group. In the S.O.e + I/R group, S.O.e pretreatment attenuated the I/R-induced increases in BUN, creatinine, MDA, and proinflammatory cytokines induced, SOD was maintained, and histology showed discontinuous necrosis in the medulla but no necrosis in the cortex. Conclusions. S.O.e was neither hepatotoxic nor nephrotoxic. S.O.e. pretreatment showed a nephroprotective effect against I/R.

Nephroprotective Effect of Sonchus oleraceus Extract against Kidney Injury Induced by Ischemia-Reperfusion in Wistar Rats