Gökce E.C. | Kahveci R. | Gökce A. | Cemil B. | Aksoy N. | Sargon M.F. | Kisa Ü.

Article | 2016 | Journal of Neurosurgery: Spine24 ( 6 ) , pp.949 - 959

Objective: Ischemia-reperfusion (I/R) injury of the spinal cord following thoracoabdominal aortic surgery remains the most devastating complication, with a life-changing impact on the patient. Thymoquinone (TQ), the main constituent of the volatile oil from Nigella sativa seeds, is reported to possess strong antioxidant, antiinflammatory, and antiapoptotic properties. This study investigated the effects of TQ administration following I/R injury to the spinal cord. Methods: Thirty-two rats were randomly allocated into 4 groups. Group 1 underwent only laparotomy. For Group 2, aortic clip occlusion was introduced to produce I/R injury. . . . Group 3 was given 30 mg/kg of methylprednisolone intraperitoneally immediately after the I/R injury. Group 4 was given 10 mg/kg of TQ intraperitoneally for 7 days before induction of spinal cord I/R injury, and administration was continued until the animal was euthanized. Locomotor function (Basso, Beattie, and Bresnahan scale and inclined plane test) was assessed at 24 hours postischemia. Spinal cord tissue samples were harvested to analyze tissue concentrations of malondialdehyde, nitric oxide, tumor necrosis factor-?, interleukin-1, superoxide dismutase, glutathione-peroxidase, catalase, and caspase-3. In addition, histological and ultrastructural evaluations were performed. Results: Thymoquinone treatment improved neurological outcome, which was supported by decreased levels of oxidative products (malondialdehyde and nitric oxide) and proinflammatory cytokines (tumor necrosis factor-? and interleukin- 1), increased activities of antioxidant enzymes (superoxide dismutase, glutathione-peroxidase, and catalase), as well as reduction of motor neuron apoptosis. Light microscopy and electron microscopy results also showed preservation of tissue structure in the treatment group. Conclusions: As shown by functional, biochemical, histological, and ultrastructural analysis, TQ exhibits an important protective effect against I/R injury of the spinal cord. © 2016 AANS Daha fazlası Daha az

Kale A. | Pişkin Ö. | Baş Y. | Aydın B.G. | Can M. | Elmas Ö. | Büyükuysal Ç.

Article | 2019 | International Journal of Radiation Research17 ( 2 ) , pp.229 - 236

Background: Extensive research has been focused on radiation induced brain injury. Animal and human studies have shown that flavonoids have remarkable toxicological profiles. This study aims to investigate the neuroprotective effects of hesperidin in an experimental radiation induced brain injury. Materials and Methods: 32 adult male Wistar-Albino rats were randomly divided into 4 groups (control, hesperidin, radiation, and radiation+hesperidin groups; 8 rats in each group). 200 mg/kg doses of hesperidin were administered to the animals in the hesperidin and radiation+ hesperidin groups, radiation and radiation+ hesperidin groups we . . .re exposed to a dose of 20 Gy cranium region. Tissue samples, and biochemical levels of tissue injury markers in four groups were compared. Results: In all measured parameters of oxidative stress, administration of hesperidin significantly demonstrated favorable effects. Both plasma and tissue levels of malondialdehyde and total antioxidant status significantly changed in favor of antioxidant activity. Histopathological evaluation of the tissues also demonstrated significant decrease in cellular degeneration and infiltration parameters after hesperidin administration. Conclusion: This Hesperidin demonstrated significant neuroprotection after radiation induced brain injury. Further studies with different experimental settings including neurological outcome are required to achieve conclusive results. © 2019 Novin Medical Radiation Institute. All rights reserved Daha fazlası Daha az

Gul S. | Bahadir B. | Hanci V. | Acikgoz S. | Bektas S. | Ugurbas E. | Ankarali H.

Article | 2010 | Journal of Clinical Neuroscience17 ( 5 ) , pp.608 - 611

We investigated the effect of ebselen relative to nimodipine in an animal model of subarachnoid hemorrhage. Thirty Wistar albino rats were divided into 5 groups: G1, no intervention; G2, sham surgery without subarachnoid hemorrhage (SAH); G3, SAH only; G4, SAH plus nimodipine treatment; G5, SAH plus ebselen treatment. For G2 animals, physiological saline (0.9% NaCl) was injected into the cisterna magna. For G3, G4 and G5 animals, SAH was induced by injecting autologous non-heparinized blood into the cisterna magna. One hour after injection, G4 animals received nimodipine at 6-hour intervals and G5 animals received ebselen twice a da . . .y for 48 hours. After treatment, brain tissue and blood samples were taken for biochemical and histopathological examination. Mean malonyldialdehyde concentration was significantly higher in G3 than in G1 (p < 0.0001), G2 (p = 0.01), G4 (p = 0.002) and G5 (p = 0.014), and significantly higher in G5 than in G1 (p = 0.013). Mean superoxide dismutase activity was significantly lower in G4 than in both G1 (p = 0.025) and G2 (p = 0.02). Mean wall thickness was significantly greater in G3 than in G1 (p < 0.0001), G2 (p = 0.01), G4 (p < 0.0001) and G5 (p < 0.0001). Mean wall thickness was also significantly greater in both G1 and G2 than in G4 (p < 0.0014 and p < 0.0001) and G5 (p < 0.0001 and p < 0.0001). Mean luminal diameter of the basilar artery was significantly smaller in G3 than in G2 (p = 0.02), G4 (p < 0.018) and G5 (p < 0.001). Our results confirm that ebselen may have neuroprotective effects by acting to prevent vasospasm. © 2009 Elsevier Ltd. All rights reserved Daha fazlası Daha az

Kahveci R. | Gökçe E.C. | Gürer B. | Gökçe A. | Kisa U. | Cemil D.B. | Sargon M.F.

Article | 2014 | European Journal of Pharmacology741 , pp.45 - 54

Rosuvastatin, which is a potent statin, has never been studied in traumatic spinal cord injury. The aim of this study was to investigate whether rosuvastatin treatment could protect the spinal cord after experimental spinal cord injury. Rats were randomized into the following five groups of eight animals each: control, sham, trauma, rosuvastatin, and methylprednisolone. In the control group, no surgical intervention was performed. In the sham group, only laminectomy was performed. In all the other groups, the spinal cord trauma model was created by the occlusion of the spinal cord with an aneurysm clip. In the spinal cord tissue, ca . . .spase-3 activity, tumor necrosis factor-alpha levels, myeloperoxidase activity, malondialdehyde levels, nitric oxide levels, and superoxide dismutase levels were analyzed. Histopathological and ultrastructural evaluations were also performed. Neurological evaluation was performed using the Basso, Beattie, and Bresnahan locomotor scale and the inclined-plane test.After traumatic spinal cord injury, increases in caspase-3 activity, tumor necrosis factor-alpha levels, myeloperoxidase activity, malondialdehyde levels, and nitric oxide levels were detected. In contrast, the superoxide dismutase levels were decreased. After the administration of rosuvastatin, decreases were observed in the tissue caspase-3 activity, tumor necrosis factor-alpha levels, myeloperoxidase activity, malondialdehyde levels, and nitric oxide levels. In contrast, tissue superoxide dismutase levels were increased. Furthermore, rosuvastatin treatment showed improved results concerning the histopathological scores, the ultrastructural score and the functional tests. Biochemical, histopathological, ultrastructural analysis and functional tests revealed that rosuvastatin exhibits meaningful neuroprotective effects against spinal cord injury. © 2014 Elsevier B.V Daha fazlası Daha az

Gokce E.C. | Kahveci R. | Atanur O.M. | Gürer B. | Aksoy N. | Gokce A. | Sargon M.F.

Article | 2015 | Injury46 ( 11 ) , pp.2146 - 2155

Introduction Ganoderma lucidum (G. lucidum) is a mushroom belonging to the polyporaceae family of Basidiomycota and has widely been used as a traditional medicine for thousands of years. G. lucidum has never been studied in traumatic spinal cord injury. The aim of this study is to investigate whether G. lucidum polysaccharides (GLPS) can protect the spinal cord after experimental spinal cord injury. Materials and methods Rats were randomized into five groups of eight animals each: control, sham, trauma, GLPS, and methylprednisolone. In the control group, no surgical intervention was performed. In the sham group, only a laminectomy w . . .as performed. In all the other groups, the spinal cord trauma model was created by the occlusion of the spinal cord with an aneurysm clip. In the spinal cord tissue, caspase-3 activity, tumour necrosis factor-alpha levels, myeloperoxidase activity, malondialdehyde levels, nitric oxide levels, and superoxide dismutase levels were analysed. Histopathological and ultrastructural evaluations were also performed. Neurological evaluation was performed using the Basso, Beattie, and Bresnahan locomotor scale and the inclined-plane test. Results After traumatic spinal cord injury, increases in caspase-3 activity, tumour necrosis factor-alpha levels, myeloperoxidase activity, malondialdehyde levels, and nitric oxide levels were detected. After the administration of GLPS, decreases were observed in tissue caspase-3 activity, tumour necrosis factor-alpha levels, myeloperoxidase activity, malondialdehyde levels, and nitric oxide levels. Furthermore, GLPS treatment showed improved results in histopathological scores, ultrastructural scores, and functional tests. Conclusions Biochemical, histopathological, and ultrastructural analyses and functional tests reveal that GLPS exhibits meaningful neuroprotective effects against spinal cord injury. © 2015 Elsevier Ltd. All rights reserved Daha fazlası Daha az