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    The effect of melatonin on acetylsalicylic acid induced kidney and testis damage
    (Human & Experimental Toxicology, 2014) Altıntaş, Ramazan; Polat, Alaadin; Parlakpınar, Hakan; Vardı, Nigar; Beytur, Ali; Oğuz, Fatih; Sağır, Mustafa; Yıldız, Azibe; Duran, Zeynep Rümeysa
    The aim of this study was to evaluate the acute effect of high-dose acetylsalicylic acid (ASA) on kidney and testis, and the potential protective and therapeutic effects of melatonin on ASA-related pathology. A total of 40 rats were randomly divided into the following 5 groups (n ¼ 8): group 1: control, not given any drug; group 2: only 200 mg/kg ASA was given; group 3: 5 mg/kg melatonin was given 45 min before administering 200 mg/kg ASA; group 4: 5 mg/kg melatonin was given 45 min after administering 200 mg/kg ASA; and group 5: only 5 mg/kg melatonin was given. The histopathological changes and the biochemical findings; such as malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX), reduced glutathione (GSH), and blood urea nitrogen (BUN) as well as serum creatinine (Cr) levels were evaluated. ASA significantly increased MDA levels in both kidney and testis, whereas it significantly decreased the values of SOD, CAT, GPX, and GSH in kidney and CAT levels in testis. Melatonin significantly decreased MDA levels in kidney and ameliorated it in testis, whereas it caused elevation in the levels of antioxidants. BUN and Cr levels were higher after ASA, whereas these levels were diminished after melatonin administration. The improvement obtained by melatonin on ASA-induced histological alterations was more prominent when it was used after ASA in kidney and before ASA in testis. In this study, we demonstrated the beneficial effect of melatonin on high-dose ASA-related pathology of kidney and testis for the first time.
  • Küçük Resim Yok
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    The protective effect of apocynin on testicular ischemia reperfusion injury
    (The journal of ürology, 2015) Özbek, Özkan; Altıntaş, Ramazan; Polat, Alaadin; Vardı, Nigar; Parlakpınar, Hakan; Sağır, Mustafa; Duran, Zeynep Rümeysa; Yıldız, Azibe
    We investigated the protective effect of the NADPH oxidase inhibitor apocynin on testicular damage induced by ischemia-reperfusion injury in rats. Materials and Methods A total of 32 rats were randomly divided into 4 groups. Controls underwent left scrotal exploration only. The 3 groups with ischemia-reperfusion underwent 4-hour torsion followed by 1-hour detorsion. The ischemia-reperfusion only group underwent left testicular torsion and detorsion. The ischemia-reperfusion plus saline group underwent left testicular torsion, received 10 ml/kg saline intraperitoneally at minute 210 of ischemia and then underwent detorsion. The ischemia-reperfusion plus apocynin group underwent left testicular torsion, received 20 mg/kg apocynin intraperitoneally at minute 210 of ischemia and then underwent detorsion. We determined histopathological findings and performed specific biochemical analyses. Results In the ischemia-reperfusion only and the ischemia-reperfusion plus saline groups malondialdehyde, total oxidative capacity and the oxidative stress index were significantly higher. Superoxide dismutase, catalase, glutathione peroxidase and glutathione were significantly lower. Apocynin significantly decreased malondialdehyde, total oxidative capacity and the oxidative stress index, and significantly increased superoxide dismutase and catalase. There was a significantly increase in the number of giant, degenerated and desquamated cells in the ischemia-reperfusion group. Apocynin significantly improved these histological alterations. Conclusions These histopathological and biochemical findings show the beneficial effects of apocynin on testicular ischemia-reperfusion injury.
  • Küçük Resim
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    Protective effects of melatonin and d glucan againstliver injury in rats a comparative study
    (Advances in Clinical and Experimental Medicine, 2013) Aydoğan, Mustafa Said; Erdoğan, Mehmet Ali; Polat, Alaadin; Yücel, Aytaç; Özgül, Ülkü; Parlakpınar, Hakan; Duran, Zeynep Rümeysa; Yıldız, Azibe; Durmuş, Mahmut
    Objectives. The aim of this study was to investigate the possible protective effects of melatonin and β-d-glucan against ischemia-reperfusion (IR) injury in rats. Materials and Methods. Forty rats were randomly divided into 5 groups, each consisting of 8 animals, as follows. Sham group [S], IR group [C], IR + β-Glucan group [β], IR + melatonin group [MLT], IR + melatonin + β-Glucan group [MLT + β]. The rats in the C, β, MLT and MLT + β groups were subjected to IR for 60 min each. Melatonin (10 mg∙kg–1) was intraperitoneally injected for a single dose 30 min before IR. β-Glucan (50 mg∙kg–1∙day–1) was orally administered for 10 days to rats. All of the rats were killed on day 11, and histological changes in the liver and tissue levels of oxidants and antioxidants were evaluated. Results. Malondialdehyde [MDA] level were significantly higher in the C group compared to the S group (p = 0.007). MDA level were significantly higher in the β group compared to the MLT and MLT + β groups (p =0.007). Tissue antioxidant markers (superoxide dismut ase [SOD], glutathione-peroxidase [GPx], and catalase [CAT]) were significantly lower in the C group than the S group (p < 0.05). SOD levels were simply not significant in the β group compared to the MLT and MLT + β groups. CAT and GPx activities were significantly higher in the β group compared to the MLT and MLT + β groups (p = 0.004).The histological damage ameliorated in β, MLT and MLT + β groups compared to C group. Conclusion. Our results suggest that melatonin and β-glucan combination pretreatment suppressed oxidative stress and increased antioxidant levels in an experimental rat model of liver IR injury.