Browsing by Author "Kabaroglu C."

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    Treatment and prophylaxis with sucralfate ameliorates hypoxia/ reoxygenation-induced intestinal injury in pup rats
    (2005) Sencan A.B.; Sencan A.; Aktas S.; Habif S.; Kabaroglu C.; Parildar Z.; Karaca I.
    Background: Sucralfate is widely used as a cytoprotective agent in patients with peptic ulcer and other intestinal mucosal injury. The aim of this study is to investigate whether sucralfate has any effect on the prevention and treatment of hypoxia/reoxygenation-induced intestinal injury. Material/Methods: Four groups of 10 1-day-old rat pups were studied. Hypoxia/reoxygenation (H/O)-induced intestinal injury was created. Group 1 was subjected to H/O just after birth and sacrificed at the end of the third day (Treatment Control). Group 2 was subjected to H/O just after birth and treated with sucralfate for 3 days. They were sacrificed at the end of the third day (Treatment). Group 3 was subjected to H/O on the third day after birth and then sacrificed (Prophylaxis Control). Group 4 was treated with sucralfate for the first 3 days, then H/O was created. Just after H/O, the pups were sacrificed (Prophylaxis). The intestinal tissues were harvested for histopathological investigation. Malondialdehyde (MDA) levels in the intestinal tissues were determined. Results: The mucosal injury grades of the treatment and prophylaxis groups were significantly lower than those of control groups (p<0.05). The mean MDA level in the treatment and prophylaxis groups were 0.42±0.17 and 0.21±0.23 nmol/mg respectively. The MDA levels of both groups were significantly lower than in the control groups (p<0.05). Conclusions: The present study shows that sucralfate has beneficial effects in an experimental model of hypoxia/reoxygenation-induced intestinal injury. © Med Sci Monit, 2005.
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    Oxidative stress impairs endothelial nitric oxide levels in Behçets' disease
    (2011) Onur E.; Kabaroglu C.; Inanir I.; Var A.; Guvenc Y.; Gunay O.; Gunduz K.
    Background: Behçet's disease (BD) is an inflammatory vasculitis. Endogenous nitric oxide (NO), produced by endothelial cells, has pleiotropic effects such as vasodilatator, antiplatelet, antiproliferative. Reactive oxygen species (ROS) are produced at sites of endothelial inflammation. ROS target polyunsaturated lipids, which results in malondialdehyde (MDA) production. Objective: The aim was to investigate the oxidative stress in BD patients by measuring MDA and total antioxidant status (TAS) levels and to establish a possible relationship with respect to NO levels regarding disease activity. Materials and methods: 55 BD patients (30 active/25 inactive) and 20 healthy volunteers were included in the study. Blood samples were drawn following an overnight fasting. TAS and MDA levels were determined spectrophotometrically. Serum nitrite (NO 2-) and nitrate (NO 3-) levels were measured to estimate NO production. Data were expressed as mean ± SD. Results: TAS levels were significantly lower in BD patients than the controls (1.19 ± 0.34 vs. 3.29 ± 0.89 mmol/L). In the active BD group, MDA levels (0.36 ± 0.19 nmol/mL) were significantly higher than both the inactive BD group (0.25 ± 0.18 nmol/mL) and controls (0.18 ± 0.41 nmol/mL). NO levels were significantly lower in the active group compared to the inactive group (18.0 ± 2.80 vs. 19.40 ± 2.70 μmol/L). MDA levels correlated negatively with NO levels in the active group. Conclusion: Decreased NO levels mediated by increased oxidative stress significantly contribute to endothelial dysfunction observed in BD. © 2011 Informa Healthcare USA, Inc.