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    Neuroprotective effect of carvacrol in an experimental cerebral ischemia and reperfusion rat model
    (Ondokuz Mayis Universitesi, 2022) Başaran, Mustafa; Öztanir, Mustafa Namık; Çıftçı, Osman; Başak Türkmen, Neşe; Akyuva, Yener; Önder, Arif
    The Neuroprotective effect of carvacrol, which has anti-inflammatory and antioxidant effects, on infarcted cerebral tissue is present in literature, but this contribution was not sufficiently clarified in terms of biochemistry. It is aimed to investigate the effect of orally administered carvacrol on plasma and intraparenchymal levels of TBARS, GSH, SOD, CAT, GSH-Px, IL-1?, IL-4, and TNF-? after the formation of global ischemia in cerebral tissue. Four groups were formed, each containing ten Wistar albino rats. After anesthesia and analgesia, bilateral carotid communis arteries of rats in the first two groups were clamped for 15 minutes with aneurysm clips. Oral 50 mg/kg/day carvacrol was administered for 15 days to the first group (I/R+CRV) of these two groups in which cerebral ischemia-reperfusion (I/R) was established. On the other hand, %0,01 carboxymethylcellulose (CMC), which is a solvent of carvacrol, at a same volume of first group was administered orally for the same duration to the other group in which also I/R was established (I/R+CMC). In the other two groups in which ischemia was not induced, only carotid artery dissections were made and sutured again. In these two groups, 50 mg/kg/day of carvacrol was administered to the first group (CRV). The Same dose of CMC was administered to the second group (control group). After all these treatments, plasma was collected, and brain tissue was dissected from all groups at the end of the 15th day. Carvacrol can be included in the possible treatment regimen of cerebral stroke with the help of other studies that can be supported on this topic. © 2022 Ondokuz Mayis Universitesi. All rights reserved.
  • Küçük Resim
    Öğe
    Spinal arachnoiditis and the axonal degeneration of the spinal nerve roots due to ischemia induced by vasospasm: An experimental study
    (2009) Önder, Arif; Serarslan, Yurdal; Aydın, Mehmet Dumlu; Kanat, Ayhan; Gürsan, Nesrin; Yolaş, Coşkun
    Objective: Various reasons have been ascribed to arachnoiditis development, among which subarachnoid hemorrhage (SAH) may be an important factor in this process. In this experimental study, we investigated the effect of SAH on histopathological findings. The volumetric changes of the radicular arteries and the density of spinal nerve root axons of a SAH model on C4 roots in rabbits were measured. Materials and Methods: In this study, 18 rabbits were used. The animals were randomly divided into three groups: subarachnoid hemorrhage (SAH; n = 10), physiologic serum (SF; n = 4) and control (n = 4) groups. SAH was performed by injecting 0.5 cc of blood into cisterna magna taken from their auricular veins. Cervical spinal nerve roots at the C4 level were examined histopathologically. Results: Meningeal thickening and adhesions, reddish spinal cord and radices were detected macroscopically. Histopathologically, leptomeningeal adhesions, intimal lesions of radicular arteries and axonal injury were detected at the nerve radices. The mean radicular artery volume was found to be low on the arachnoiditis developing animals. The mean alive axon density of the C4 nerve root decreased and axonal degeneration was observed in the SAH group. Conclusion: Our study suggests that SAH may be an important etiologic factor in spinal arachnoiditis.