title: The anti-inflammatory effect of erythropoietin and melatonin on renal ischemia reperfusion injury in male rats.
abstract: OBJECTIVE
  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.
  
  
  CONCLUSIONS
  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.
authors.affiliation: Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
authors.forename: Nasser
authors.initials: N
authors.lastname: Ahmadiasl
authors.affiliation: Department of Physiology, Tabriz University of Medical Sciences, Tabriz, Iran.
authors.forename: Shokofeh
authors.initials: S
authors.lastname: Banaei
authors.affiliation: Department of Histology & Embryology, Tabriz University of Medical Sciences, Tabriz, Iran.
authors.forename: Alireza
authors.initials: A
authors.lastname: Alihemmati
authors.affiliation: Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
authors.forename: Behzad
authors.initials: B
authors.lastname: Baradaran
authors.affiliation: Department of Linguistics and Foreign Languages, Payame Noor University, Tehran, Iran.
authors.forename: Ehsan
authors.initials: E
authors.lastname: Azimian
keywords: Erythropoietin; Inflammation; Melatonin; Renal ischemia reperfusion