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    The effect of levosinnendan on myocardial ischemia reperfusion injury in streptozotocin-induced diabetic rats
    (Co-Action Publishing, 2015) Kiraz, Hasan Ali; Poyraz, Fatih; Kip, Gulay; Erdem, Ozlem; Alkan, Metin; Arslan, Mustafa; Comu, Faruk Metin
    Objective: Ischemia/reperfusion (I/R) injury is an important cause of myocardial damage by means of oxidative, inflammatory, and apoptotic mechanisms. The aim of the present study was to examine the potential cardio protective effects of levosimendan in a diabetic rat model of myocardial I/R injury. Methods: A total of 18 streptozotocin-induced diabetic Wistar Albino rats (55 mg/kg) were randomly divided into three equal groups as follows: the diabetic I/R group (DIR) in which myocardial I/R was induced following left thoracotomy, by ligating the left anterior descending coronary artery for 60 min, followed by 2 h of reperfusion; the diabetic I/R levosimendan group (DIRL), which underwent I/R by the same method while taking levosimendan intraperitoneal 12 mu g kg(-1); and the diabetic control group (DC) which underwent sham operations without tightening of the coronary sutures. As a control group (C), six healthy age-matched Wistar Albino rats underwent sham operations similar to the DC group. Two hours after the operation, the rats were sacrificed and the myocardial tissue samples were examined by light microscopy for evidence of myonecrosis and inflammatory cell infiltration. Results: Myonecrosis findings were significantly different among groups (p = 0.008). Myonecrosis was more pronounced in the DIR group compared with the C, DC, and DIRL groups (p = 0.001, p = 0.007 and p = 0.037, respectively). Similarly, the degree of inflammatory cell infiltration showed significant difference among groups (p < 0.0001). Compared with C, DC, and DIRL groups, the inflammatory cell infiltration was significantly higher among the DIR group (p < 0.0001, p < 0.0001, and p = 0.020, respectively). Also, myocardial tissue edema was significantly different among groups (p = 0.006). The light microscopic myocardial tissue edema levels were significantly higher in the DIR group than the C, DC, and DIRL groups (p = 0.001, p = 0.037, and p = 0.014, respectively). Conclusion: Taken together, our data indicate that levosimendan may be helpful in reducing myocardial necrosis, myocardial inflammation, and myocardial tissue edema resulting from ischemia reperfusion injury.
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    Öğe
    Effects of esmolol on lung injury induced by lower extremity Ischemia-reperfusion
    (Bayrakol Medical Publisher, 2022) Sabuncu, Ulku; Sezen, Saban Cem; Kucuk, Aysegul; Salman, Nevriye; Sabuncu, Timucin; Kip, Gulay; Kurtipek, Omer
    Aim: After hind limb ischemia-reperfusion (I/R), impairments in remote organs are frequent. Lung tissue is the organ most affected by the remote organ damage. The lung damage increases ventilatory support, the need for inotropic agents and mortality. Many drugs and methods have been used in attempts to prevent or reduce this damage. The aim of this study is to investigate the protective effects of esmolol infusion on lung tissue prior to I/R created in the lower extremity. Material and Methods: The study was performed between 11 and 14 April 2018 in Gazi University Experimental Animal Research Center, Ankara, Turkey. After obtaining ethics committee approval, 24 rats were randomly divided into 4 groups: Control (Group C), Esmolol (Group E), Ischemia-reperfusion (Group I/R), and I/R-Esmolol (Group I/RE). Esmolol (200 mu g/kg/min intravenous) was applied 30 minutes before the procedure. The biochemical and histopathological parameters of lung tissue samples were compared. Results: Neutrophil infiltration/aggregation, alveolar wall thickness, and total lung injury scores were significantly higher in the I/R group than in the C and E groups. In addition, neutrophil infiltration/aggregation, alveolar wall thickness, and total lung injury scores in the I/R group were statistically higher than in the I/R-E group (p=0.030, p=0.010, p=0.001, respectively). Malondialdehyde levels, catalase (CAT) and paraoxonase (PON) enzyme activities in the I/R group were significantly higher than in the C, E, and I/R-E groups. Glutathione S- transferase ( GSH) enzyme activity was similar in all groups. Discussion: It was found that esmolol infusion at 200 mu g/kg/min intravenously-reduced oxidative stress when administered 30 minutes before ischemia in rats and partially corrected the damage caused by I/R in lung histopathology.
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    Öğe
    The Effect of Sevoflurane and Fullerenol C 60 on the Liver and Kidney in Lower Extremity Ischemia-Reperfusion Injury in Mice with Streptozocin-Induced Diabetes
    (Dove Medical Press Ltd, 2023) Sengel, Necmiye; Kucuk, Ayseguel; Ozdemir, Cagri; Sezen, Saban Cem; Kip, Gulay; Er, Fatma; Dursun, Ali Dogan
    Objective: This study aimed to demonstrate whether fullerenol C60, sevoflurane anesthesia, or a combination of both had protective effects on the liver and kidneys in lower extremity ischemia-reperfusion injury (IRI) in mice with streptozocin-induced diabetes. Methods: A total of 46 Swiss albino mice were divided into six groups as follows: control group (group C, n=7), diabetes group (group D, n=7), diabetes-ischemia/reperfusion (group DIR, n=8), diabetes-ischemia/reperfusion-fullerenol C60 (group DIR-FC60, n=8), diabetes-ischemia/reperfusion-sevoflurane (group DIR-S, n=8), and the diabetes-ischemia/reperfusion-fullerenol C60-sevoflurane (group DIR-S-FC60, n=8). Fullerenol C60 (100mg/kg) was administered intraperitoneally 30 min before the ischemia-reperfusion procedure to the fullerenol groups (DIR-FC60 and DIR-S-FC60). In the DIR groups, 2 hours (h) ischemia-2h reperfusion periods were performed. In the sevoflurane groups, sevoflurane was applied during the ischemia-reperfusion period with 100% O2. Liver and kidney tissues were removed at the end of the reperfusion procedure for biochemical and histopathological examinations.Results: In liver tissue, hydropic degeneration, sinusoidal dilatation, pycnotic nuclei, prenecrotic cells, and mononuclear cell infiltration in parenchyma were significantly more frequent in group DIR than in groups D and group C. In terms of the histopathologic criteria examined, more positive results were seen in group DIR-FC60, and when group DIR-FC60 was compared with group DIR, the difference was significant. The best results in AST, ALT, glucose, TBARS levels, and SOD enzyme activities in liver tissue were in group DIR-FC60 compared with group DIR, followed by groups DIR-S-FC60 and DIR-S, respectively. Regarding TBARS levels and SOD enzyme activities in kidney tissue, the best results were in groups DIR-FC60, DIR-S-FC60, and DIR-S, respectively.Conclusion: According to our findings, it is clear that fullerenol C60 administered intraperitoneally 30 min before ischemia, alone or together with sevoflurane, reduces oxidative stress in distant organ damage caused by lower extremity IRI, and reduces liver and kidney tissue damage in histopathologic examinations.
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    Öğe
    The Effects of Esmolol on Erythrocyte Deformability in Rat Liver Ischemia-Reperfusion Injury
    (Gazi Univ, Fac Med, 2021) Sabuncu, Ulku; Kucuk, Aysegul; Comu, Faruk Metin; Salman, Nevriye; Kip, Gulay; Unal, Yusuf; Arslan, Mustafa
    Background: Esmolol has protective effects in ischemia reperfusion (IR) injury. The purpose of our study was to look into the effects of this which esmolol on erythrocyte deformability in rat liver IR injury model. Materials and Methods: We used 24 Wistar albino rats as subjects in our study. They were divided into 4 groups; randomized control group (group C; n=6), esmolol group 200 mu g/kg/min intravenously (group E; n=6), IR group (group IR; n=6) and IR group with esmolol 200 mu g/kg/min intravenously (group IR-E; n=6). Erythrocyte packs were prepared from heparinized blood samples and deformability measurements were performed. Results: It was discovered that ischemia reperfusion increased the relative resistance when compared to control group (p<0.0001). Erythrocyte deformibility index was found to be higher in IR and IR-E groups compared to control group (p<0.0001, p=0.002, respectively). Esmolol application decreased the erythrocyte deformibiltiy index when compared to control group (p=0.017). Conclusion: In this research, esmolol application has improved the ertyhrocyte deformibity in liver rat IR injury partially. We also found that esmolol had beneficial effects by reversing undesirable effects of IR. Further studies with larger volume are required to support our promising results.