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Öğe Beneficial effects of quercetin on renal injury and oxidative stress caused by ciprofloxacin in rats: A histological and biochemical study(Sage Publications Ltd, 2016) Elbe, H.; Dogan, Z.; Taslidere, E.; Cetin, A.; Turkoz, Y.Ciprofloxacin is a broad-spectrum quinolone antibiotic commonly used in clinical practice. Quercetin is an antioxidant belongs to flavonoid group. It inhibits the production of superoxide anion. In this study, we aimed to evaluate the effects of quercetin on renal injury and oxidative stress caused by ciprofloxacin. Twenty-eight female Wistar albino rats were divided into four groups: control, quercetin (20 mg kg(-1) day(-1) gavage for 21 days), ciprofloxacin (20 mg kg(-1) twice a day intraperitoneally for 10 days), and ciprofloxacin + quercetin. Samples were processed for histological and biochemical evaluations. Malondialdehyde (MDA) and glutathione (GSH) levels, superoxide dismutase (SOD), and catalase (CAT) activities were measured in kidney tissue. The ciprofloxacin group showed histopathological changes such as infiltration, dilatation in tubules, tubular atrophy, reduction of Bowman's space, congestion, hemorrhage, and necrosis. In the ciprofloxacin + quercetin group, these histopathological changes markedly reduced. MDA levels increased in the ciprofloxacin group and decreased in the ciptofloxacin + quercetin group. SOD and CAT activities and GSH levels significantly decreased in the ciprofloxacin group. On the other hand, in the ciprofloxacin + quercetin group, SOD and CAT activities and GSH levels significantly increased with regard to the ciprofloxacin group. We concluded that quercetin has antioxidative and therapeutic effects on renal injury and oxidative stress caused by ciprofloxacin in rats.Öğe Effect of a honey and arginine-glutamine-hydroxymethylbutyrate mixture on the healing of colon anastomosis in rats immunosuppressed with tacrolimus(Taylor & Francis Ltd, 2019) Akbulut, S.; Dogan, Z.; Baskiran, A.; Elbe, H.; Turkoz, Y.We compared the effect of honey and a mixture of arginine-glutamine-hydroxymethylbutyrate (AGHMB) on healing of a descending colon anastomosis in rats that were immunosuppressed with tacrolimus (Tac). Sprague-Dawley rats were divided into four groups: untreated control, Tac, Tac + honey and Tac + AGHMB. Colon resection and anastomosis were performed on day 14 and re-laparotomy was performed on the day 21 of the study. Anastomotic bursting pressure, macroscopic adhesion score, weekly body weight changes, histopathological features and immunohistochemical staining of TGF-beta 1 were determined for all groups. We found no significant difference in anastomotic bursting pressure among the experimental groups. We found significant weekly increases in body weight for the Tac + honey group. We found no significant difference in the weekly body weight measurements for the Tac + AGHMB group. We found significant increases in TGF-beta 1 expression in the Tac + honey group compared to the control and Tac groups. No significant differences in inflammatory cell infiltration, fibroblast proliferation or collagen deposition were found between the Tac + honey and Tac + AGHMB groups; however, a significant difference in neovascularization between these groups was found. Neovascularization in the Tac + honey group was significantly greater than for the Tac + AGHMB group. We found that both honey and the AGHMB mixture were beneficial for anastomotic wound healing in rats that were immunosuppressed using Tac.Öğe Effect of chemotherapy exposure prior to pregnancy on fetal brain tissue and the potential protective role of quercetin(Springer, 2015) Dogan, Z.; Kocahan, S.; Erdemli, E.; Kose, E.; Yilmaz, I.; Ekincioglu, Z.; Ekinci, N.Cyclophosphamide (CYC) and doxorubicin (DOX) are among the most effective and widely used anticancer chemotherapeutic drugs. Potential chemopreventive and chemotherapeutic functions have recently been attributed to flavonoids. We hypothesized that Quercetin (QR) would protect against the toxic effects of chemotherapeutic agents applied prior to pregnancy. Rats were treated with the chemotherapeutic drugs CYC (27 mg/kg) and DOX (1.8 mg/kg) applied in a single intraperitoneal dose once every 3 weeks for 10 weeks. QR was administered at a dose of 10 mg/kg/day by oral gavage. 48 h following the experimental chemotherapy exposure, female rats were transferred to cages containing male rat for mating. Fetal brain tissues were removed from fetuses extracted by cesarean section on the 20th day of gestation for evaluation of antioxidant parameters. A significant increase in superoxide dismutase and malondialdehyde activity was observed in CYC and DOX treatment groups relative to the control group (p < 0.05). Similarly, carnitine acylcarnitine translocase and Glutathione activity was significantly reduced in the CYC and DOX groups relative to the control group (p < 0.05). Our results indicate that the use of chemotherapeutic drugs before pregnancy can result in oxidative damage to fetal brain tissue. Therefore, women who have been exposed to chemotherapy and may become pregnant should be treated with antioxidant compounds such as QR to reduce the risk of damage to fetal brain tissues.Öğe Effects of ciprofloxacin on fetal rat liver during pregnancy and protective effects of quercetin(Taylor & Francis Ltd, 2017) Dogan, Z.; Elbe, H.; Taslidere, E.; Soysal, H.; Cetin, A.; Demirtas, S.Urinary tract infections are common in pregnant women and ciprofloxacin frequently is used as a broad spectrum antibiotic. It has been suggested that ciprofloxacin causes liver damage in fetuses. Quercetin is a flavonoid with antioxidant properties. We investigated the efficacy of quercetin treatment for preventing fetal liver damage caused by ciprofloxacin. Pregnant rats were divided into four groups: untreated control group (C), 20 mg/kg quercetin for 21 days group (Q), 20 mg/kg twice/day ciprofloxacin for 10 days group (CP), and 20 mg/kg, ciprofloxacin + quercetin for 21 days group (CP + Q). Fetal livers were removed on day 21 of gestation to measure antioxidants and for histological observation. Malondialdehyde (MDA) and glutathione (GSH) levels, and superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) activities were measured in tissue samples. GSH-Px, SOD and CAT activities were significantly lower in the CP group compared to group C. A significant increase in MDA was observed in the CP group compared to group C. There was no significant difference in GSH levels in any group. MDA levels were lower and CAT, SOD and GSH-Px enzyme activities were higher in the CP + Q group compared to group CP. Liver samples of the CP group exhibited central vein dilation, portal vein congestion, pyknotic nuclei and cytoplasmic vacuolization in some hepatocytes. Histological changes were less prominent in the rats treated with quercetin. Use of ciprofloxacin during pregnancy caused oxidative damage in fetal liver tissue. Oxidative stress was ameliorated by quercetin. Quercetin supports the antioxidant defense mechanism and it is beneficial for treating fetal liver damage caused by ciprofloxacin.Öğe The effects of montelukast against amikacin-induced acute renal damage(Verduci Publisher, 2012) Kose, E.; Beytur, A.; Dogan, Z.; Ekincioglu, Z.; Vardi, N.; Cinar, K.; Turkoz, Y.Background and Objectives: The therapeutic and protective effects of montelukast against amikacin-induced acute renal damage were investigated. Material and Methods: 35 Wistar albino female rats were divided into 5 groups as follows: Group I: Control; Group II: Control+montelukast; Group III: Amikacin; Group IV: Amikacin+montelukast; Group V: Montelukast+amikacin. At the end of the experiment, the kidney tissues and the blood of rats were collected. Malondialdehyde (MDA), myeloperoxidase (MPO), and reduced glutathione (GSH) levels were determined from kidney tissues. Blood urea nitrogen (BUN), creatinine (Cr), TNF-alpha, and IL-1 beta levels were assessed in the serum. In addition the kidney tissues were examined histologically. Results and Discussion: The MDA, MPO, BUN, and Cr levels of group III significantly increased when compared to groups I and II. These parameters of group IV decreased when compared to group III. In addition, GSH levels significantly increased when compared to the first three groups. MDA, BUN and Cr levels of group V did not reach significant level in comparison with the control group. The most significant histological damage was observed in the group III followed by the groups IV and V. Immunohistochemically, group III showed a significantly increased apoptotic staining. In group IV, it was observed that montelukast treatment reduced the expression of apoptotic cells. Conclusions: Montelukast treatment after amikacin injection could reduce the amikacin-induced kidney damage.Öğe Inhaled nitric oxide as rescue therapy in severe ARDS cases due to COVID-19 pneumonia: a single center experience(Verduci Publisher, 2023) Bicakcioglu, M.; Kalkan, S.; Duzenci, D.; Yalcinsoy, M.; Dogan, Z.; Ozer, A. B.OBJECTIVE: Inhaled NO (iNO) has been recommended as rescue therapy in acute respiratory stress syndrome (ARDS) cas-es. In this study, we aimed to demonstrate the efficacy of iNO as a rescue therapy in patients with severe ARDS due to COVID-19.PATIENTS AND METHODS: This retrospec-tive study included patients with ARDS due to COVID-19 who were treated with iNO between March 2020 and January 2022 in the intensive care unit (ICU) of Inonu University. Patients' files were reviewed retrospectively, and de-mographic data, APACHE II and Sequential Or-gan Failure Assessment (SOFA) scores, initia-tion day of iNO and duration of iNO treatment, length of stay in hospital/ICU, blood biochem-istry values, complete blood counts, inflamma-tory parameters, arterial blood gas values, lac-tate, PaO2/FiO2 ratios, anti-inflammatory drugs and outcome were recorded.RESULTS: Data from 16 patients were reached. iNO was given at a dose of 20 ppm continuously. The mean duration of treatment with iNO was 3.5 days. All patients took the prone position except a single patient. While all patients received steroid therapy, four pa-tients received anti-cytokine therapy, and five patients received intravenous immunoglobulin therapy. All patients were in severe ARDS with a mean PaO2/FiO2 ratio of 58 before iNO ther-apy. A significant increase in PaO2/FiO2 val-ues was detected with the use of iNO (p<0.05). While three patients (19%) were discharged from the ICU, thirteen patients died.CONCLUSIONS: In our study, it was deter-mined that iNO applied as a rescue treatment in patients with severe ARDS improved oxygen-ation. Although the effect of iNO on survival was low, it may be interpreted as clinically signifi-cant considering the severity of the general clin-ical condition of the patients.Öğe Investigation of the effects of acrylamide applied during pregnancy on fetal brain development in rats and protective role of the vitamin E(Sage Publications Ltd, 2016) Erdemli, M. E.; Turkoz, Y.; Altinoz, E.; Elibol, E.; Dogan, Z.A liberal amount of acrylamide (AA) is produced as a result of frying or baking foods in high temperatures, and individuals take certain amounts of AA everyday by consuming these food items. Pregnant women are also exposed to AA originating from food during pregnancy and their fetus are probably affected. The rats were divided into five different groups: control (C), corn oil (CO), vitamin E (Vit E), AA, and Vit E + AA, with eight pregnant rats in each group. On the 20th day of pregnancy, fetuses were removed and brain tissues of fetuses were examined for biochemical and histological changes. AA caused degeneration in neuron structures in fetal brain tissue and caused hemorrhagic damages; dramatically decreased brain-derived neurotrophic factor levels; increased malondialdehyde, total oxidant capacity levels; and decreased reduced glutathione and total antioxidant capacity levels (p < 0.05). On the other hand, it was determined that the Vit E, a neuroprotectant and a powerful antioxidant, suppressed the effects of AA on fetal development and fetal brain tissue damage for the above-mentioned parameters (p < 0.05). It is recommended to consume food containing Vit E as a protection to minimize the toxic effects of food-oriented AA on fetus development due to the widespread nature of fast-food culture in today's life and the impossibility of protection from AA toxicity.Öğe Tracheal intubation without muscle relaxant after induction with remifentanil, S-ketamine and propofol(Lippincott Williams & Wilkins, 2004) Demirbilek, S.; Togal, T.; Gulhas, N.; Ozpolat, Z.; Dogan, Z.; Demir, K.; Ersoy, M. O.[Abstract Not Available]
