Yazar "Diken H." seçeneğine göre listele

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    Effect of exercise on blood antioxidant status and erythrocyte lipid perodixation: Role of dietary supplementation of vitamin E
    (1999) Kelle M.; Diken H.; Sermet A.; Atmaca M.; Tumer C.
    We tested the effects of moderate physical exercise on the blood antioxidant capacity and erythrocyte lipid peroxidation in 21 Wistar albino rats. Erythrocyte superoxide dismutase (SOD) activity increased significantly (p<0.05) in control exercised animals (C-Ex), but catalase activity did not change. SOD activity was decreased by dietary supplementation of vitamin E (p<0.05). In vitamin E supplemented group (E-Ex), catalase activity was reduced in comparison to C-Ex group. Total glutathione (total GSH) level was unaffected by the exercise. However, significant reduction was observed in reduced glutathione (GSH), whereas oxidized glutathione (GSSG) increased (p<0.01 and p<0.001, respectively). In E-Ex animals, total GSH and GSH were increased in comparison to C-Ex group. GSH/GSSG ratio decreased abnormally in both exercised groups (p<0.001). Serum cholesterol and uric acid levels increased significantly after exercise (p<0.05). The susceptibility of erythrocytes to in vitro peroxidation increased in C-Ex and E-Ex animals (p<0.001 and p<0.01, respectively). Elevated malondialdehyde (MDA) concentration in serum attained statistical significance after exercise. However, this elevation was prevented by vitamin E supplementation. Our results indicated that moderate intensive treadmill running exercise was sufficient to result in muscle damage and increases in the susceptibility of erythrocytes to in vitro peroxidation. In addition, dietary supplementation of vitamin E is able to minimize oxidative damage caused by exercise.
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    Öğe
    Effect of vitamin B6 intake on tissue zinc levels in the rat
    (1995) Sermet A.; Atmaca M.; Ulak G.; Diken H.; Ulak M.
    Effect of vitamin B6 intake on tissue zinc (Zn) concentrations was investigated in weanling, male Wistar albino rats (100-120 g). The animals were divided into two groups (n = 9) and treated for 4 weeks by intraperitoneal 5 mg/kg/day pyridoxine-HCl or placebo. The Zn content of the liver, spleen, right kidney and right femur were determined. Increases in weight gain in the control and Pyridoxine-treated group were 29.20 ± 1.43% and 51.20 ± 4.53%, respectively (P < 0.001). Dried weights of liver, kidney and femur were significantly higher than those of control group (p < 0.01; p < 0.02; p < 0.001, respectively). No significant difference was observed between the serum Zn concentrations of the experimental and control group (P > 0.05). The Zn content of the liver, spleen, kidney and femur for both total and dry weight per gram of organ weight were significantly higher in the experimental group compared to controls. These findings suggested that pyridoxine affects Zn metabolism in young rats.
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    Öğe
    The effectiveness of hemopoietic growth factors in sepsis
    (2001) Yilmaz G.; Aldemir M.; Yilmaz R.; Diken H.; Büyükbayram H.; Akgün Y.
    In this experimental study, consist of 54 Sprague-Dawley rats, we tried to observe the effectiveness of haemopoietic growth factors such as G-CSF and GM-CSF in treatment of sepsis and see if they have any effects on phagocytic activity of macrophages when are administered after establishment of sepsis. In first phase of this study, twenty one rats were randomly divided into three groups of 7 animals each. Cecal ligation and perforation were carried out in each rat and sepsis made up. The Control group received 2 x 0.2 cc %5 dextrose injection subcutaneous (s.c.).. The G-CSF group received 2 x 1 g G-CSF with 0.2 cc %5 dextrose s.c. The GM-CSF received 1 x 2 g GM-CSF with 0.2 cc %5 dextrose s.c. Seventh day survival was considered as criterion in the three groups. In second phase of this study, thirty three rats were randomly divided into three groups of 11 animals each. The same procedures were carried out also in these groups. Leukocyte counts and peripheric spread were analyzed in postoperative 24th and 72th hours, alveolar and peritoneal macrophages were Investigated in postoperative 72nd hour. There was significantly neutrophilic leukocytosis in the G-CSF group according to the control group. Nevertheless, there was no change in the phagocytic activity of alveolar and peritoneal macrophages. GM-CSF brought about positive effect of phagocytic activity of macrophages without change of leucocyte count in the sepsis, but it caused neutrophilic, monocytosis and lymphocytopenia. The seventh day survival rates in control, G-CSF, GM-CSF groups were as; 42.8%, 71.4%, 28.5% respectively. As a result, we saw that G-CSF has no effect on the phagocytic activity of macrophages, while increases the survival by enhancing the count and probably the function of neutrophils. GM-CSF fails to increase survival while effects the phagocytic activities of macrophages positively and enhances the peripheral neutrophil and monosit counts without changing the total number of leukocytes.