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    The comparison of alpha lipoic acid with methylprednisolone and sucralfate in subacute wound healing corrosive esophagus-induced rats: An experimental study
    (Baycinar Medical Publ-Baycinar Tibbi Yayincilik, 2023) Gultekin, Mustafa; Ceran, Sami; Gultekin, Burcu
    Background: This study aims to compare methylprednisolone frequently used in the therapeutic practices of corrosive esophagus burns, sucralfate, a protective material of mucosal surfaces, and alpha lipoic acid, the most potent antioxidant in a rat model. Methods: A total of 40 female Sprague-Dawley rats were used in this study. The rats were equally divided into control, alpha lipoic acid, methylprednisolone, and sucralfate groups (n=10). A corrosive esophagus burn was created by using 10% pH:12 sodium hydroxide. No treatment was applied to the control group, and each group was given their own treatment. The treatment was continued regularly until the eighth day, when they were sacrificed. The corrosive esophagus burn lines were removed and tissue sections were stained with hematoxylin and eosin. Results: The difference in ulceration in the group treated with alpha lipoic acid was significant, compared to the other groups. The most excellent complete epithelialization and complete re-epithelialization were observed in the alpha lipoic acid group. The difference between the groups was significant, with complete re-epithelialization being the lowest in the control and methylprednisolone groups (42.9% and 12.5%, respectively) and the highest in the alpha lipoic acid group (77.8%). In terms of ulceration and re-epithelialization, comparable values were found in the alpha lipoic acid group. The main difference was that the inflammation levels in the sucralfate group were lower and more favorable than the other groups in this period. The glutathione level was significantly higher in the alpha lipoic acid group and decreased the tissue hydroxyproline level. Conclusion: Alpha lipoic acid reduces esophageal ulceration, severity and prevalence of inflammation, severity and prevalence of fibrosis, decreases tissue damage by increasing blood glutathione level, and also reduces stricture in corrosive esophagus burns in rats.
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    Evaluation of Apoptosis Pathway of Geraniol on Ishikawa Cells
    (Routledge Journals, Taylor & Francis Ltd, 2021) Kuzu, Betul; Cuce, Gokhan; Ayan, Ilknur Cinar; Gultekin, Burcu; Canbaz, Halime Tuba; Dursun, Hatice Gul; Sahin, Zafer
    Endometrial cancer is the most common type of cancer in the female reproductive system. Geraniol is acyclic monoterpene alcohol derived from essential oils of aromatic plants. This study aimed to investigate the apoptosis pathway of geraniol on Ishikawa cells. The cytotoxic effects of Geraniol on Ishikawa cells were determined by an MTT test. Ishikawa cells were seeded on cover slips, the IC50 dose was applied, and the cells were incubated with antibodies against Bax, Bcl-2, and TUNEL Assay. mRNA expression analysis of apoptosis-related genes was determined by RT-qPCR with an IC50 dose of Geraniol. The IC50 dose of Geraniol decreased Bcl-2 staining significantly, but it significantly increased Bax staining and TUNEL positive cells. A significant increase in the Bax, caspase3, caspase-8, cytochrome C and Fas genes and a significant decrease in the Bcl-2 gene was observed when the IC50 dose group was compared to the cells in the control group based on their mRNA expression levels.Analysis of expression of genes whose products are involved in apoptosis suggests the involvement of the mitochondrial pathway.
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    Evaluation of Histopathological Effects of Acamprosate Use on Kidneys in Alcohol-Dependent Rats
    (Aves, 2023) Ozdengul, Faik; Gultekin, Burcu; Kusen, Hande; Karakus, Behiye Nur; Sen, Aysu
    Objective: Alcohol addiction is one of the growing global addiction threads. The present study aims to investigate histopathological effects of acamprosate, which is widely used in the treatment of alcohol dependence, on kidneys. Methods: Rats were divided into 4 groups. The control group was given 10 mg/kg/day saline, and the alcohol group was given 10 mg/kg/day ethanol, diluted with 10 mg/kg/day saline. To the acamprosate group, 200 mg/kg/day acamprosate diluted with 10 mg/kg/day saline was given. The alcohol + acamprosate group was given 10 mg/kg/day ethanol diluted with 10 mg/kg/day saline, then combined with 200 mg/kg/day acamprosate. On the 21st day, after the study began, signs of alcohol withdrawal syndrome in the rats were evaluated. On the 22nd day, kidney tissues of the rats were extracted. Results: Histopathological evaluation revealed that kidney tissues of the control group had normal structure. It was determined that Bowman's spaces were close to normal in kidneys of the alcohol group. In kidneys of the acamprosate group, an increased Bowman's space distance and intense tubular degeneration, shedding in tubule epithelial cells, and tubular dilatation were detected (P <.05). In kidneys of the alcohol + acamprosate group, Bowman's space distance was better than the acamprosate group, but tubular degeneration, shedding in tubule epithelial cells, and tubular dilatation continued (P <.05). Our findings revealed that the use of acamprosate alone produced serious histopathological consequences for kidneys. Conclusion: It has been understood that it is important to control kidney health at certain intervals during the period of alcohol-dependent individuals without any kidney disease receiving acamprosate treatment.
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    Protective effect of MitoTEMPO against cardiac dysfunction caused by ischemia-reperfusion: MCAO stroke model study
    (Taylor & Francis Ltd, 2023) Akkoca, Ahmet; Buyukakilli, Belgin; Balli, Ebru; Gultekin, Burcu; Ozbay, Erkan; Demirbag, Hatice Oruc; Turkseven, Cagatay Han
    PurposeNeurological impairments are the leading cause of post-stroke mortality, while stroke-related cardiovascular diseases rank second in significance. This study investigates the potential protective effects of MitoTEMPO (2,2,6,6-tetramethyl-4-[[2-(triphenylphosphonio) acetyl] amino]-1-piperidinyloxy, monochloride, monohydrate), a mitochondria-specific antioxidant, against cardiac and neurological complications following stroke. The objective is to assess whether MitoTEMPO can be utilized as a protective agent for individuals with a high risk of stroke.Materials and methodsSeventeen-week-old male Wistar Albino rats were randomly assigned to three groups: SHAM, ischemia-reperfusion and MitoTEMPO + ischemia-reperfusion (MitoTEMPO injection 0.7 mg/kg/day for 14 days). The SHAM group underwent a sham operation, while the ischemia-reperfusion group underwent 1-h middle cerebral artery occlusion followed by three days of reperfusion. Afterwards, noninvasive thoracic electrical bioimpedance and electrocardiography measurements were taken, and sample collection was performed for histological and biochemical examinations.ResultsOur thoracic electrical bioimpedance and electrocardiography findings demonstrated that MitoTEMPO exhibited a protective effect on most parameters affected by ischemia-reperfusion compared to the SHAM group. Furthermore, our biochemical and histological data revealed a significant protective effect of MitoTEMPO against oxidative damage.ConclusionsThe findings suggest that both ischemia-reperfusion-induced cardiovascular abnormalities and the protective effect of MitoTEMPO may involve G-protein coupled receptor-mediated signaling mechanisms. This study was conducted with limitations including a single gender, a uniform age group, a specific stroke model limited to middle cerebral artery, and pre-scheduled only one ischemia-reperfusion period. In future studies, addressing these limitations may enable the implementation of preventive measures for individuals at high risk of stroke.