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    The effects of spinosad on antioxidant system and cognitive performance of mice
    (Taylor & Francis Ltd, 2021) Acar, Abdullah; Akkoc, Hasan; Erdinc, Meral
    Introduction: There are few studies examining the effect of spinosad on cognitive functions in the literature. Methods: In this study, we applied spinosad 3 weeks in different doses to mice and examined their effects on antioxidant system and cognitive performance. Results: In the open field test, we observed a significant decrease (p < .05) in the total distance travelled and the time spent in the central area in all subjects who underwent spinosad. In the novel object recognition test, we observed decreases in the time spent with new and old objects. From the biochemical point of view, while BDNF and NGF levels were significantly lower in the spinosad applied group (p < .05), there was no difference in GPx and SOD levels (p > .05). Conclusions: These results show that spinosad disrupts cognitive functions at the doses we used in our study and this negative effect may be related to the decrease in neurotrophic factors.
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    Ethyl Pyruvate Prevents Ischemia Reperfusion Injury in Isolated Perfused Rat Heart
    (Colegio Farmaceuticos Provincia De Buenos Aires, 2013) Akkoc, Hasan; Tunik, Selcuk; Kelle, Ilker; Gurkan, Ahmet; Erdogmus, Zeynep; Simsek, Selda; Erdinc, Meral
    The aim of the present study was to investigate the protective effect of ethyl pyruvate (EP) against ischemia reperfusion (I/R) injury in isolated rat heart. Male Sprague-Dawley rats were divided into three groups (n = 8); Group 1: Control group, Group 2: I/R, Group 3: I/R+EP. Ischemia was produced for 30 min by blocking the perfusion with Krebs Henseleit solution and it was followed by reperfusion for 60 min. In group 3, EP (2 mmol/L) was added into Krebs Henseleit solution after stabilization period. EP did not change the number of a-smooth muscle actin positive vessels and expression of Bcl-2 and desmin. Treatment with EP significantly reduced I/R induced extension in infarct size (p < 0.001) and release of lactate dehidrogenase (p < 0.001) and creatine phosphokinase (p < 0.05). Myocardial I/R injury significantly increased oxidative stress index and malondialdehyde, total oxidant status levels and significantly decreased paraoxonase actvity and total antioxidant status (p < 0.05). On the other hand, alterations in these biochemical indices due to I/R injury were attenuated by EP treatment (p < 0.01). These results show that ethyl pyruvate prevents ischemia reperfusion injury in isolated perfused rat heart.
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    Öğe
    Protective effects of ethyl pyruvate in cisplatin-induced nephrotoxicity
    (Taylor & Francis Ltd, 2014) Kelle, Ilker; Akkoc, Hasan; Tunik, Selcuk; Nergiz, Yusuf; Erdinc, Meral; Erdinc, Levent
    This study was performed to investigate the effect of ethyl pyruvate on changes in renal functions and oxidative stress related renal injury caused by cisplatin (cis-dichlorodiammine platinum-II; CDDP). Male Wistar albino rats were divided into four groups (n = 8): (1) control group (1ml Ringer's lactate solution i.p.); (2) ethyl pyruvate (EP) group (50mg/kg Ringer's EP solution (REPS) i.p.); (3) cisplatin group (a single dose of cisplatin (5mg/kg, i.p.); and (4) cisplatin + EP group (a single dose of cisplatin (5mg/kg, i.p.) + REPS 50mg/kg/day, i.p.) for five days. At the sixth day, kidneys of rats were mounted to a Langendorff apparatus. Renal perfusion pressures were recorded. Blood samples were taken for serum urea, creatinine, total oxidant status (TOS), total antioxidant status (TAS) and oxidative stres index (OSI) evaluations. Kidney tissues were obtained for malondialdehyde (MDA) analyses and histopathological examination. Perfusion pressures, serum urea, creatinine, TOS, OSI and tissue MDA levels were found significantly higher, whereas TAS was notably lower in cisplatin group. Histopathological examination showed apparent renal paranchymal injury in cisplatin group. In cisplatin + REPS group, perfusion pressures, serum urea, creatinine and tissue MDA levels were decreased. Moreover, EP co-administration provided less inflammatory cell infiltration, tubular dilatation, whereas TOS, TAS and OSI improved significantly versus cisplatin group. These findings show that EP has protective effects against cisplatin nephrotoxicity.