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    The protective effect of fish oil against cisplatin induced eye damage in rats
    (Taylor & Francis Ltd, 2018) Baykalir, Burcu Gul; Ciftci, Osman; Cetin, Asli; Turkmen, Nese Basak
    Ocular toxicity induced by anticancer chemotherapy is not uncommon, but underestimated and under-reported. Visual changes have been attributed to a number of chemotherapeutic agents in humans. Cisplatin (CP), a heavy metal compound, is used in the treatment of many types of tumours. CP is known to produce nonspecific blurred vision, papilledema, and optic neuritis for high doses as well as cumulative dose regimens. The aim of this study was to investigate the possible beneficial effects of fish oil (FO) on eye tissue oxidative status and histological alterations against CP-induced in the rats. The animals were randomly divided into the following four groups: the control, CP, FO, and CP+FO groups. CP was intraperitoneally administered at the dose of 7mg/kg and FO was orally given at 1 softgel per day for 14days. The eye injury was assessed by biochemical and histological examinations. The levels of thiobarbituric acid reactive substances (TBARS), reduced glutathione (GSH), activities of superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) were evaluated in the eye tissue. TBARS levels were significantly higher, the activities of the antioxidant enzyme and GSH levels were significantly lower in the CP group than in the control group. The histopathological evaluation also confirmed the foregoing findings. On the other hand, treatment of FO ameliorated the biochemical and histological alterations caused by CP. The results showed that treatment with FO may protect against the negative ocular effects of CP.
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    The protective effects of chrysin and flunixin meglumine against excess copper in male rats
    (Tubitak Scientific & Technological Research Council Turkey, 2018) Seven, Pinar Tatli; Baykalir, Burcu Gul; Seven, Ismail; Ak, Tuba Parlak; Basak, Nese; Gulluoglu, Hakan
    Thirty-six Sprague Dawley male rats were housed in individual cages and randomly divided into six groups: control, copper sulfate (Cu; 500 ppm body weight (BW)/day), flunixin meglumine (FM; 2.2 ppm BW/day), chrysin (chrysin; 50 ppm BW/day), copper sulfate + FM (Cu + FM; 500 ppm BW/day of copper sulfate and 2.2 ppm BW/day of FM), and copper sulfate + chrysin (Cu + Chrysin; 500 ppm BW/day of copper sulfate and 50 ppm BW/day of chrysin). Feed intake (FI) in the Cu + Chrysin group significantly increased in comparison with that of the Cu group (P < 0.01). Cu excess significantly increased malondialdehyde, indicating oxidative stress. Chrysin and FM administration significantly decreased malondialdehyde levels and increased the superoxide dismutase and catalase activities in the liver and kidney tissues (P < 0.001). Serum TNF-a levels were significantly lower in the Cu + FM and Cu + Chrysin groups in comparison to the Cu group (P < 0.001). It was seen that FM and chrysin treatments alleviated degeneration, necrosis, and apoptosis in the liver and kidney tissues of the Cu-treated rats. Chrysin appeared to ameliorate the adverse effects on FI and liver and kidney tissues by scavenging where the free radicals are located and increasing the activity of antioxidants.