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    Effect of dexmedetomidine on ischemia-reperfusion injury of liver and kidney tissues in experimental diabetes and hepatic ischemia-reperfusion injury induced rats
    (Anaesthesia Pain & Intensive Care, 2016) Sezen, Saban Cem; Isik, Berrin; Bilge, Mustafa; Arslan, Mustafa; Comu, Faruk Metin; Ozturk, Levent; Kavutcu, Mustafa
    Background: Reperfusion following ischemia can lead to more injuries than ischemia itself especially in diabetic patients. The aim of this study was to evaluate the effect of dexmedetomidine on ischemia-reperfusion injury (IRI) in rats with have hepatic IRI and diabetes mellitus. Methodology: Twenty-eight Wistar Albino rats were randomised into four groups as control (C), diabetic (DC), diabetic with hepatic ischemia-reperfusion injury (DIR), and diabetic but administered dexmedetomidine followed by hepatic IRI (DIRD) groups. Hepatic tissue samples were evaluated histopathologically by semiquantitative methods. Malondialdehyde (MDA), superoxide dismutase (SOD), glutathion s-transpherase (GST), and catalase (CAT) enzyme levels were investigated in liver and kidney tissues as oxidative state parameters. Results: In Group DIR; hepatocyte degeneration, sinusoidal dilatation, pycnotic nucleus, and necrotic cells were found to be more in rat hepatic tissue; while mononuclear cell infiltration was higher in the parenchyme. MDA levels were significantly lower; but SOD levels were significantly higher in Group DIRD with regard to Group DIR. In the IRI induced diabetic rats' hepatic and nephrotic tissues MDA levels, showing oxidative injury, were found to be lower. SOD levels, showing early antioxidant activity, were higher. Conclusion: The enzymatic findings of our study together with the hepatic histopathology indicate that dexmedetomidine has a potential role to decrease IRI.
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    Effects of the general anaesthetic agent, propofol, on erythrocyte deformability
    (Comenius Univ, 2010) Arslan, Mustafa; Comu, Faruk Metin; Isik, Berrin; Unal, Yusuf; Cekmen, Nedim; Kurtipek, Omer
    Objectives: Propofol is an anesthetic agent frequently used for sedation and general anesthesia. The purpose of our study was to investigate the effect of propofol, a general anesthetic, on erythrocyte deformability in rats. Methodology: The study was performed on 20 male and 20 female rats, with 10 rats in each study group and 10 rats in each control group. The rats in the study group were administered propofol (150 mg.kg(-1)) intraperitoneally, and the rats in the control group were administered SF. Erythrocyte packs were prepared using heparinized total blood samples. Deformability measurements were done by erythrocyte suspensions in PBS buffer. A constant flow filtrometer system was used to measure erythrocyte deformability, and the relative resistance was calculated. Results: The use of propofol resulted in the increase in the relative resistance, which is an indicator for the erythrocyte deformability in both male and female rats (p=0.002, p=0.042, respectively). Conclusion: A negative change in the erythrocyte deformability may cause a functional deterioration in blood flow and tissue perfusion (Fig. 1, Ref. 23). Full Text (Free, PDF) www.bmj.sk.
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    Investigation of Effects of Propofol and Vitamin C Administration on Hepatic and Renal Tissue in Diabetic Rats
    (Gazi Univ, Fac Med, 2015) Arslan, Mustafa; Bilge, Mustafa; Sezen, Saban Cem; Ozturk, Levent; Isik, Berrin; Comu, Faruk Metin; Yilmaz, Dervis
    Obective: A close relationship between diabetic complications and lipid peroxidation is known. It was shown that in diabetic rat pharmacodynamics and pharmacokinetics of propofol was changed. We aim to investigate effects of application propofol and vitamin C on liver and kidney tissue in diabetic rats. Method: Twenty eight wistar albino rats were randomly divided into 4 study groups. Rats in control group were treated only with saline intra peritonealy. Experimental diabetes was induced with a single dose of streptozotocin (60 mg/kg). In propofol adminastrated diabetic rat group (DP) 150 mg/kg propofol was given intraperitoneally. In both propofol and vitamin C adminastrated rats group (DP+Vit C), 100 mg/kg vitamin C was given before 30 minutes administration of 150 mg/kg propofol. In the diabetic control group (DC) administartion of intraperitoneally saline solution alone to the diabetic rats was achieved. Rats were sacrified and liver and kidney tissue were removed. Liver and renal tissue was obtained for histological and biochemical determination. Antioxidant enzymes SOD, CAT, GST activities and MDA concentration were determined in liver and renal tissue. Results: Liver MDA levels in group DC was found to be significantly higher than DP, DP+Vit C and C groups (p=0.024, p=0.008, p=0.016). Liver SOD activity in group 3 was found to be significantly lower in groups DP+Vit C and C (p=0.011, p=0.038). Liver GST activity in group DP+Vit C was found to be significantly lower when compared with group C (p = 0.011). Liver CAT activity showed no difference among groups. Renal MDA levels in group DC was found to be significantly higher in groups DP+Vit C and C (p=0.016, p=0.010). Renal SOD activity in DC was found to be significantly lower than groups DP, DP+Vit C and C (p=0.028, p=0.019, p=0.009). Renal GST and CAT activity showed no difference among groups. Histopathalogically group DP was more damaged than in group C. Conclusion: Diabetes increased lipid peroxidation and reduced the antioxidant activity. However, application of vitamin C reduced lipid peroxidation and increased antioxidant activity. Results of our study have to be supported other experimental studies.