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    Protective Effects of Hypericum perforatum and Quercetin in a Rat Model of Ischemia/Reperfusion Injury of Testes
    (Georg Thieme Verlag Kg, 2018) Suzen, Alev; Tekin, Leyla; Erdemli, Mehmet Erman; Erturk, Nazile; Aksungur, Zeynep; Aktas, Serdar
    Purpose This study aimed to compare the protective effects of Hypericum perforatum (Hp) and quercetin, a flavonoid, against ischemia/reperfusion (I/R) injury in rat testes. Materials and Methods This study included 28 male Wistar albino rats that were divided into four groups. Except for the sham group, torsion was created by rotating both testes at an angle of 720 degrees clockwise for 2 hours. The Hp and quercetin groups received 25 mg/kg Hp and quercetin intraperitoneally 30 minutes before detorsion, respectively. Orchiectomy was performed for the measurement of markers of oxidative stress and histopathological examination. Results In the Hp and quercetin groups, malondialdehyde (MDA) and nitric oxide (NO) levels and total oxidant capacity were significantly lower, the glutathione level and total antioxidant status were significantly higher, and Johnsen's testis biopsy scores were significantly higher than in the torsion/detorsion group (p=0.001). The markers of oxidative injury were significantly lower (p=0.001) and total antioxidant status was significantly higher (p=0.001), except for glutathione (p=0.62) in the Hp group than in the quercetin group. Johnsen's score between Hp and quercetin groups was not significantly different (p=0.80). Conclusion Both Hp and quercetin have protective effects against I/R injury of the testes, but the protective effect of Hp was found to be stronger than that of quercetin.
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    Protective effects of sildenafil and resveratrol on ovarian ischemiareperfusion injury in rats
    (Scientific Publishers of India, 2017) Erturk, Nazile; Elbe, Hulya; Erdemli, Mehmet Erman; Aktas, Serdar; Yigitturk, Gurkan; Aksungur, Zeynep; Suzen, Alev
    Aim: This study investigated the protective effects of sildenafil (SIL) and resveratrol (RSV) on ovarian ischemia-reperfusion (I/R) injury. Materials and methods: Forty-Eight Wistar albino rats were divided equally into groups: control (sham), ischemia (2 h ischemia), I/R (2 h ischemia+2 h reperfusion), I/R+RSV (10 mg/kg intraperitoneally), I/R+SIL (1.4 mg/kg intraperitoneally), and I/R+RSV+SIL. RSV and SIL were administered 30 min before the end of the ischemia period, and reperfusion was carried out for 2 h. The ovaries were then removed and evaluated histopathologically for mean histopathological damage score (MHDS) and anti-inducible nitric oxide (NO) synthase (iNOS) antibody. Malondialdehyde (MDA) level, glutathione (GSH) activity, total antioxidant status (TAS), total oxidant status (TOS), and NO level were measured. Results: Histopathological findings such as enema, inflammation, haemorrhage, and congestion were detected in the ischemia and I/R groups. Compared with controls, these groups had significantly higher MHDSs. Compared with the ischemia and I/R groups, the treatment groups had significantly decreased MHDSs. iNOS immunostaining was most evident in the ischemia and I/R groups, and TOS and MDA and NO levels were significantly increased, whereas GSH activity and TAS were significantly decreased compared with those in controls. TOS and MDA and NO levels were significantly decreased, and GSH activity and TAS were significantly increased in the treatment groups. Conclusion: RSV and SIL decreased histopathological and biochemical damage and exerted protective effects on I/R-induced ovarian damage. SIL and RSV act simultaneously to reduce tissue injury. © 2017, Scientific Publishers of India, All rights reserved.