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Öğe The effect of resveratrol on the prevention of cisplatin ototoxicity(Springer, 2012) Erdem, T.; Bayindir, Tuba; Filiz, A.; Iraz, M.; Selimoglu, E.One of the most important adverse effects of cisplatin, a chemotherapeutic agent which is widely used in the treatment of cancer patients, is hearing loss. This has primarily been associated with the loss of inner ear hairy and spiral ganglion cells due to oxidative stress. Resveratrol is known to be an antioxidant agent, which has the theoretical potential of preventing cisplatin-related ototoxicity. This experimental study was approved by Animal Ethics Committee of Inonu University (2008-20) and supported by Inonu University Scientific Research Projects Support Fund (2009-17). Thirty-four 3-month-old Wistar albino female rats weighing 210-270 g were used in the study. The animals were allocated into four groups: in cisplatin group (Group A), a single dose of 12 mg/kg cisplatin was administered intraperitoneally to 10 rats; in cisplatin + resveratrol group (Group B), a single dose of 12 mg/kg cisplatin and 10 mg/kg resveratrol were administered intraperitoneally for 5 days to 10 rats; in resveratrol group (Group C), 10 mg/kg resveratrol was administered intraperitoneally for 5 days to seven rats and in control group (Group D), resveratrol solvent (5% alcohol-95% physiological saline) was administered intraperitoneally for 5 days to seven rats. Resveratrol administration has begun 1 day before cisplatin administration in the group treated with cisplatin and resveratrol combination. Distortion product otoacoustic emission (DPOAE) (Grason Stadler, Madison, USA) measurements were performed in the same ear of all rats (right ear) under general anesthesia at baseline, 1st and 5th days after drug administration. Statistically significant distortion product amplitude reductions were found in the cisplatin group at 1,418, 2,003, 3,363, 5,660, 8,003 and 9,515 Hz frequencies. Whereas in the cisplatin + resveratrol group, statistically significant difference was found between 1st and 5th day measurements only at 3,996 Hz frequency. No significant differences were noted between the measurements either in the resveratrol or in the control groups. According to these results, cisplatin-related ototoxicity has been greatly prevented by resveratrol use.Öğe Effects of iloprost on bleomycin-induced pulmonary fibrosis in rats compared with methyl-prednisolone(Elsevier Doyma Sl, 2012) Aytemur, Z. Ayfer; Hacievliyagil, S. Savas; Iraz, M.; Samdanci, E.; Ozerol, E.; Kuku, I.; Nurkabulov, Z.Objective: Prostacyclin (PGI2) has been shown to inhibit the expression of pro-inflammatory and pro-fibrotic mediators in pulmonary fibrosis. In this study, we aimed to test the preventive effects of intraperitoneally administered iloprost, a stable PGI2 analog, on bleomycin-induced pulmonary fibrosis in rats and to compare the effects of iloprost with the effects of methylprednisolone, a traditional therapy. Methods: Rats were randomly allocated into four groups: 1. Saline alone (n = 6); 2. Bleomycin + placebo (n = 7); 3. Bleomycin + methyl-prednisolone (n = 7); 4. Bleomycin + iloprost (n = 7). Fibrotic changes in the lungs were demonstrated by analyzing the cellular composition of bronchoalveolar lavage fluid, histological evaluation and lung hydroxyproline content. Results: Fibrosis was made in the lungs of rats by bleomycin experimentally. Fibrosis scores in the methyl-prednisolone and the iloprost groups were significantly lower than in the placebo group (p < 0.05). Furthermore, the score of the iloprost group was significantly lower than the score of the methyl-prednisolone group. The hydroxyproline content was significantly less in the methyl-prednisolone and the iloprost groups (p < 0.05). In the placebo group, the neutrophil percentage in bronchoalveolar lavage was significantly higher than in the other groups, whereas the macrophage percentage in placebo group was significantly lower (p < 0.05). Conclusion: Iloprost has protective effect on the pulmonary fibrosis induced by bleomycin and it may be more effective in decreasing fibrotic changes than methyl-prednisolone. (C) 2011 Sociedade Portuguesa de Pneumologia. Published by Elsevier Espana, S. L. All rights reserved.Öğe Preventive and early therapeutic effects of ?-Glucan on the bleomycin-induced lung fibrosis in rats(Verduci Publisher, 2015) Iraz, M.; Bilgic, S.; Samdanci, E.; Ozerol, E.; Tanbek, K.; Iraz, M.OBJECTIVE: The beta-glucans are long-chain polymers of glucose, which comprise the fungal cell wall, stimulate cells of the innate immune system, enhance disturbed epithelization, and have antioxidant effects. Oxidative stress has been implicated in the pathogenesis of bleomycin-induced lung fibrosis and various antioxidant agents have been studied for prevention and treatment of the disease. In this experimental animal study, we assessed effects of beta-glucan, extracted from barley, on the bleomycin-induced lung fibrosis, and evaluated differences of starting before and after bleomycin instillation. MATERIALS AND METHODS: Male Spraque-Dawley rats were given a single dose of bleomycin in pulmonary fibrosis groups. First dose of beta-glucan and NAC was given three days before the bleomycin injection, and at one of the other group beta-glucan was started 12 hours after bleomycin and continued until 14th day. Fibrotic changes in lung were estimated by using Aschoft's criteria and measuring lung hydroxyproline content. RESULTS: Bleomycin induced severe pulmonary fibrosis with marked increase in hydroxyproline content of lung tissue and typical lung fibrosis, which was prevented by beta-glucan. Hydroxyproline level was significantly higher in bleomycin treated rats than the other groups, and its level was decreased in the therapeutic groups, especially in the beta-glucan post-bleomycin group fibrosis score, hydroxyproline and MDA levels returned to the control levels. On the other hand, reduced glutathione level elevated in the same group. CONCLUSIONS: The data suggest that beta-glucans have protective and early therapeutic effects against bleomycin-induced lung fibrosis in rats.Öğe Serum Syndechan-1 Levels in Patients with Nonsmall Cell Lung Cancer(Elsevıer scıence ınc, 360 park ave south, new york, ny 10010-1710 usa, 2018) Tek, I.; Yetkin, O.; Yetkin, G.; Iraz, M.Öğe Serum Syndechan-1 Levels in Patients with Nonsmall Cell Lung Cancer(Elsevier Science Inc, 2018) Tek, I.; Yetkin, O.; Yetkin, G.; Iraz, M.[Abstract Not Available]
