RESUMO
BACKGROUND: Kidney ischemia reperfusion (IR) is an important cause of renal dysfunction. The hypoxic conditions in ischemic damage result in the formation of free radicals and apoptotic death of renal cells. We evaluated the renoprotective effects of linalool in IR- induced renal injury. METHODS: Wistar rats were divided into three groups of six rats; namely, control group, IR group, and linalool + IR group. The animals were unilaterally nephrectomized and subjected to 45 min of renal pedicle occlusion followed by 24 h reperfusion. Linalool (40mg/kg) was administered before ischemia. After 24h reperfusion, the kidney tissues were obtained for detection of miR-21, HSP 70 and caspase-3 expression levels and histological studies. Also, the blood samples were collected for the measurement of biochemical parameters. RESULTS: IR significantly increased the expression of miR-21, HSP70 and capase-3 and the serum levels of BUN-Cr, ALT, AST and ALP enzymes. Furthermore, histological findings of the IR group confirmed that there were acute tubular necrosis and lymphocyte infiltration in the renal tissues. Treatment with linalool improved the renal function and morphological changes. CONCLUSION: It seems that linalool could exert a nephroprotective effect via a number of mechanisms in renal IR injury.
Assuntos
MicroRNAs , Traumatismo por Reperfusão , Monoterpenos Acíclicos , Animais , Isquemia , Rim/fisiologia , Ratos , Ratos Wistar , Traumatismo por Reperfusão/tratamento farmacológicoRESUMO
BACKGROUND: Renal ischemia reperfusion (IR) is an important cause of renal dysfunction. It contributes to the development of acute renal failure. Oxidative damage from reactive oxygen species is considered to be the principal component involved in the pathophysiological tissue alterations observed during IR. The purpose of this study was to evaluate the effect of a combined treatment with erythropoietin (EPO) plus melatonin (MEL), which are known anti-inflammatory and antioxidant agents, in IR-induced renal injury in rats. METHODS: Wistar Albino rats were unilaterally nephrectomized and subjected to 45 min of renal pedicle occlusion followed by 24 h of reperfusion. MEL (10 mg/kg, i.p) and EPO (5000 U/kg, i.p) were administered prior to ischemia. After 24 h of reperfusion, blood samples were collected for the determination of superoxide dismutase (SOD), glutathione peroxidase (GPx), plasma levels of total antioxidant capacity (TAC), and malondialdehyde (MDA) and serum urea level. Also, renal samples were taken for histological evaluation. RESULTS: Ischemia reperfusion significantly increased urea, blood SOD, and GPx levels. Histological findings of the IR group indicated that there was increase in tubular and glomerular hyaline cast, thickening of Bowman capsule basement membrane, and renal impairment in the glomerular epithelium. Treatment with EPO and MEL significantly decreased blood SOD, GPx, and urea levels and increased TAC level. In the EPO + MEL group, while the histopathological changes were lower than those in EPO group, they were the same as MEL group. CONCLUSION: EPO and MEL combination treatment exerted more nephroprotective effects than EPO treatment and nearly had protective effects similar to MEL treatment.
Assuntos
Injúria Renal Aguda/prevenção & controle , Anti-Inflamatórios/uso terapêutico , Antioxidantes/uso terapêutico , Eritropoetina/uso terapêutico , Rim/irrigação sanguínea , Melatonina/uso terapêutico , Traumatismo por Reperfusão/tratamento farmacológico , Injúria Renal Aguda/etiologia , Injúria Renal Aguda/metabolismo , Animais , Modelos Animais de Doenças , Quimioterapia Combinada , Glutationa Peroxidase/metabolismo , Rim/metabolismo , Rim/patologia , Masculino , Malondialdeído/metabolismo , Modelos Animais , Ratos , Ratos Wistar , Espécies Reativas de Oxigênio/metabolismo , Traumatismo por Reperfusão/complicações , Traumatismo por Reperfusão/metabolismo , Superóxido Dismutase/metabolismoRESUMO
PURPOSE: Renal ischemia reperfusion (IR) is an important cause of renal dysfunction. It contributes to the development of acute renal failure (ARF). The purpose of this study was to investigate the anti-inflammatory effect of erythropoietin (EPO) and melatonin (MEL), which are known anti-inflammatory and antioxidant agents, in IR-induced renal injury in rats. METHODS: Male Wistar Albino rats were unilaterally nephrectomized and subjected to 45 min of renal pedicle occlusion followed by 24 h reperfusion. MEL (10mg/kg, i.p) and EPO (5000U/kg, i.p) were administered prior to ischemia. After 24 h reperfusion, blood samples were collected for the determination of total antioxidant capacity (TAC), malondialdehyde (MDA) and serum creatinine levels. Also, renal samples were taken for Immunohistochemical evaluation of Bcl2 and TNF-α (tumor necrosis factor-α) expression. RESULTS: Ischemia reperfusion increased creatinine, TAC, MDA levels and TNF-α expression, also, IR decreased Bcl2 expression. Treatment with EPO or MEL decreased creatinine, MDA levels, and increased TAC level. Also, MEL up-regulated Bcl2 expression and down-regulated TNF-α expression compared with EPO. CONCLUSION: Treatment with EPO and MEL had a curative effect on renal IR injury. These results may indicate that MEL protects against inflammation and apoptosis better than EPO in renal IR injury.