Different dose-dependent effects of ebselen in sciatic nerve ischemia-reperfusion injury in rats

Filiz Ozyigit; Aysegul Kucuk; Sezer Akcer; Murat Tosun; Emel Fatma Kocak; Cengiz Kocak; Ahmet Kocak; Hasan Metineren; Osman Genc

doi:10.17305/bjbms.2015.521

Authors

Filiz Ozyigit Dumlupinar University, Faculty of Medicine, Department of Pharmacology, Kutahya, Turkey
Aysegul Kucuk Dumlupinar University, Faculty of Medicine, Department of Physiology, Kutahya, Turkey
Sezer Akcer Dumlupinar University, Faculty of Medicine, Department of Anatomy, Kutahya, Turkey
Murat Tosun Afyon Kocatepe University, Faculty of Medicine, Department of Histology, Afyon, Turkey
Emel Fatma Kocak Dumlupinar University, Faculty of Medicine, Department of Medical Biochemistry, Kutahya, Turkey
Cengiz Kocak Dumlupinar University, Faculty of Medicine, Department of Pathology, Kutahya, Turkey
Ahmet Kocak Dumlupinar University, Faculty of Medicine, Department of Histology, Kutahya, Turkey
Hasan Metineren Dumlupinar University, Faculty of Medicine, Department of Orthopedics and Traumatology, Kutahya, Turkey
Osman Genc Dumlupinar University, Faculty of Medicine, Department of Physiology, Kutahya, Turkey

DOI:

https://doi.org/10.17305/bjbms.2015.521

Keywords:

Ebselen, ischemia-reperfusion injury, oxidative stress, sciatic nerve.

Abstract

Ebselen is an organoselenium compound which has strong antioxidant and anti-inflammatory effects. We investigated the neuroprotective role of ebselen pretreatment in rats with experimental sciatic nerve ischemia-reperfusion (I/R) injury. Adult male Sprague Dawley rats were divided into four groups (N = 7 in each group). Before sciatic nerve I/R was induced, ebselen was injected intraperitoneally at doses of 15 and 30 mg/kg. After a 2 h ischemia and a 3 h reperfusion period, sciatic nerve tissues were excised. Tissue levels of malondialdehyde (MDA) and nitric oxide (NO), and activities of superoxide dismutase (SOD), glutathione peroxidase (GPx), and catalase (CAT) were measured. Sciatic nerve tissues were also examined histopathologically. The 15 mg/kg dose of ebselen reduced sciatic nerve damage and apoptosis (P < 0.01), levels of MDA, NO, and inducible nitric oxide synthase (iNOS) positive cells (P < 0.01, P < 0.05, respectively), and increased SOD, GPx, and CAT activities (P < 0.001, P < 0.01, P < 0.05, respectively) compared with the I/R group that did not receive ebselen. Conversely, the 30 mg/kg dose of ebselen increased sciatic nerve damage, apoptosis, iNOS positive cells (P < 0.01, P < 0.05, P < 0.001) and MDA and NO levels (P < 0.05, P < 0.01) and decreased SOD, GPx, and CAT activities (P < 0.05) compared with the sham group. The results of this study suggest that ebselen may cause different effects depending on the dose employed. Ebselen may be protective against sciatic nerve I/R injury via antioxidant and antiapoptotic activities at a 15 mg/kg dose, conversely higher doses may cause detrimental effects.

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