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  • Küçük Resim
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    Beneficial Effect of Dexmedetomidine on Testicular Ischemia - Reperfusion Injury in Rats
    (Wroclaw Medical Univ, 2008) Terzi, Hakan; Öztürk, Hülya; Buğdaycı, Güler; Öztürk, Hayrettin
    Background/Objectives. The present study was designed to determine the beneficial effect of dexmedetomidine (Dex) on torsion-detorsion-induced histopathological changes in experimental testicular ischemia/reperfusion (I-R) injury in rats. Material and Methods. Twenty-one male Sprague-Dawley rats were separated into three groups of seven rats each. A sham operation was performed in group 1 (control). In group 2 (I-R/Untreated), unilateral testicular torsion was performed for 6 h followed by 1 h of detorsion of the testis. In group 3 (I-R/Dex), after performing the same procedures as in group 2, dexmedetomidine was given intravenously. Ipsilateral orchidectomies were performed in all experimental rats for histological examination. The levels of MDA and activities of SOD and CAT were measured in the testicular tissue. Results. MDA levels were higher in group 2 than in group 1 rats and lower in group 3 than in group 2. SOD and CAT activities were higher in group 3 than in group 2 rats. Histopathologically, in the group 2 rats the lesions varied between grades III and IV and edema, congestion, hemorrhage between seminiferous tubules, and necrosis of the germinal cells were predominant features in sections. However, most of the specimens in the dexmedetomi-dine-treated group 3 showed grades I and II injury. The testicular injury score was also lower in group 3 rats than in group 2. Conclusions. The results show that dexmedetomidine may play a protective role in reducing injury caused by I-R (Adv Clin Exp Med 2008, 17, 5, 513-518).
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    Montelukast protects against testes ischemia/reperfusion injury in rats
    (Canadian Urological Association, 2010) Öztürk, Hülya; Öztürk, Hayrettin; Gideroğlu, Kaan; Terzi, Hakan; Buğdaycı, Güler
    Introduction: In this study, we investigate the effect of montelukast on histologic damage induced by testicular torsion-detorsion in rats. Methods: Twenty-one male Sprague-Dawley rats were separated into 3 groups, each containing 7 rats. A sham operation was performed in group 1 (control). In group 2 (ischemia-reperfusion [I-R]/untreated), 1-hour detorsion of the testis was performed after 6 hours of unilateral testicular torsion. In group 3 (I-R/dextroamphetamine), after performing the same surgical procedures as in group 2, montelukast was given intraperitoneally. In all experimental rats, ipsilateral orchiectomies were performed for histological examination and tissue malondialdehyde (MDA), glutathione and myeloperoxidase assays. Results: Montelukast treatment significantly decreased the I-R-induced elevation in testes tissue MDA and glutathione levels were found to be preserved. The level of myeloperoxidase (MPO) activity was significantly increased in the testes tissue of the I-R/untreated group. However, in I-R/montelukast treatment group significantly decreased testes tissue MPO level. Histopathologically, the in the group 2 rats, edema, congestion, hemorrhage between seminiferous tubules and necrosis of the germinal cells were predominant features in sections. However, most of the specimens in the montelukast treated group 3 showed grades-I and II injury. Additionally, the testicular injury score was lower in group 3 rats compared with group 2. Conclusion: The current findings demonstrate that the montelukast decreased the severity of testicular injury by reversing the oxidative effects of testes I-R.