Objective: Evaluating the renoprotective effect of Echinodorus macrophyllus in acute kidney injury induced by cyclophosphamide in rats. Methods: Experimental research with Wistar rats, male adults, distributed into groups, namely: Controladministration of 1.5 ml sodium chloride 0.9% intraperitoneally; Echinodorous -administration of 2g/kg of Echinodorus macrophyllus by gavage for five days; Cyclophosphamide -administration of cyclophosphamide 150mg/kg intraperitoneally; and Cyclosphosphamide + Echinodorus -administration of Echinodorus macrophyllus and cyclophosphamide. Renal function (creatinine clearance) and the oxidative metabolites (peroxides and urinary substances reactive to thiobarbituric acid, thiols in kidney tissue) were evaluated. Results: Preconditioning with Echinodorus macrophyllus elevated the creatinine clearance and reduced the levels of oxidative metabolites. Conclusion: The antioxidant action of Echinodorus macrophyllus has demonstrated renoprotective effects evidenced by the reduction of oxidative stress in acute renal injury induced by cyclophosphamide in rats. ResumoObjetivo: Avaliar o efeito renoprotetor do Echinodorus macrophyllus na lesão renal aguda induzida pela ciclofosfamida em ratos. Métodos: Pesquisa experimental com ratos Wistar, machos e adultos que foram distribuídos nos grupos: Controle -administração de 1,5 ml de cloreto de sódio a 0,9,% por via intraperitoneal, Echinodorousadministração de 2g/kg de Echinodorus macrophyllus por gavagem durante cinco dias, Ciclofosfamida -administração de ciclofosfamida 150mg/kg por via intraperitoneal, Ciclosfofamida + Echinodorusadministração de Echinodorus macrophyllus e ciclofosfamida. Foram avaliados a função renal (clearance de creatinina) e os metabólitos oxidativos (peróxidos e substâncias reativas ao ácido tiobarbitúrico urinários, tióis no tecido renal). Resultados: O pré-condicionamento com Echinodorus macrophyllus elevou o clearance de creatinina e reduziu os níveis dos metabólitos oxidativos. Conclusão: A ação antioxidante do Echinodorus macrophyllus demonstrou efeito renoprotetor evidenciado pela redução do estresse oxidativo na lesão renal aguda induzida pela ciclofosfamida em ratos.
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