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Öğe The effect of chronic alcohol consumption on pancreas mast cells of rats(2002) Vardi N.; Otlu A.; Öztürk F.Purpose: In this study the effect of chronic alcohol consumption on pancreas mast cells of rats was investigated at light microscopic levels. Material and Methods: The study was performed on male Wistar albino rats. The experimental group was fed with a modified liquid diet (MLD) containing 7.2 % ethanol for 2,4 and 6 months. Control rats were fed on isocaloric MLD with no ethanol. At the end of the experimental feeding period, samples were fixed in Bouin solution. The sections were stained with Heamatoxylen-Eosin and Toluidin Blue methods. Results: This study revealed that the number of mast cells was significantly reduced in the alcoholic group when compared with the control group. Mast cells also showed degranulation in the experimental group. Conclusion: We conclude that alcohol induced the secretion of mast cell mediators in the pancreas of the alcohol fed rats.Öğe Improving effects of aminoguanidine on the histologic alterations in rat kidneys in diabetes(Turkiye Klinikleri, 2006) Vardi N.; Iraz M.; Gül M.; Öztürk F.; Uçar M.; Otlu A.Objective: This study was designed to investigate the improving effects of aminoguanidine on renal histological alterations in a streptozotocin (STZ)- induced diabetic rat model. Material and Methods: Fifteen Sprague-Dawley adult female rats were divided into three groups: control, diabetic (D) and diabetic treatment with aminoguanidine (DAG) groups. Experimental diabetes was induced by a single intraperitoneal dose of STZ (45 mg/kg). In the DAG group, AG was added in the drinking water (1 gr/L) after administration of STZ. This was maintained until the end of the study (for 8 weeks). At the end of the experiment, blood glucose levels were determined and after the routine tissue follow-up process, kidneys were embedded in paraffin. Histochemical and immunohistochemical stains were applied and the specimens were examined with light microscope. Results: After 8 weeks, the rats in diabetes group had significantly lower body weight and significantly higher blood glucose levels than the rats of control and DAG groups. The main histological changes resulting from diabetes were detected in glomerular and tübüler basal membrane and epithelial cells (glycogen accumulation, swelling and vacuolization). We observed the improving effects of aminoguanidine treatment on rat kidney. Conclusion: In conclusion, chronic administration of aminoguanidine reduced renal injury in STZ- induced diabetic rats. Therefore, we believe that aminoguanidine may be used to prevent development of diabetic renal damage. However, further studies are needed to elucidate the mechanisms of the improving effect of aminoguanidine on diabetic complications. Copyright © 2006 by Türkiye Klinikleri.Öğe An investigation of the effects of duloxetine on the heart(OrtadogŸu Reklam Tanitim Yayincilik Turizm Egitim Insaat Sanayi ve Ticaret A.S., 2020) Eranil I.; Vardi N.; Yildiz A.; Parlakpinar H.; Özhan O.Objevtive: The present study was designed to examine the effects of high dose and low dose duloxetine on Cx43, a gap junction (GJ) protein; on S100A, cardiac contractility component and on certain early cardiac impairment parameters as TnI and TnT. Material and Methods: The study was performed with 24 male Wistar Albino rats by generating control group (1 ml solvent), low-dose duloxetine (LDD) group (10 mg/kg) and high-dose duloxetine (HDD) group (100 mg/kg). After the experimental procedure, the results concerning blood pressure and heart rates of the anesthetized rats were recorded and HE staining and immunostaining of Cx43, S100A, TnI and TnT were applied to the heart tissue sections. Results: In the control group, Cx43 was stained as marked streaks between cardiomyocytes; TnI, TnT and S100A were stained as homogenous and dark brown in cytoplasm. Nevertheless, intensity of Cx43 immunostaining showed significant increase in duloxetine- treated groups (p<0.001). TnT (p=0.024, p=0.004, p<0.05) and S100A (p<0.001) immunostaining were low in high dose group compared to control group and low dose group. TnI immunostaining also demonstrated significant decrease in high dose duloxetine group as compared to the control group (p<0.001). There was no statistically significant difference between groups in terms of heart rate, ECG parameters, MDA, SOD, GSH and CAT levels (p>0.05). Conclusion: Our study reveals that duloxetine induced an increase in the immunostaining of Cx43, and a decrease in the immunostaining of TnI, TnT and S100A, also known as early cardiac parameters. Furthermore, duloxetine was observed to show no effect on oxidant and antioxidant parameters. While heart rate remained unchanged, mean blood pressure decreased in high dose duloxetine group. In the light of the study outcomes, it has been concluded that antidepressants must be administered more advertently in depression patients with heart disorders. © 2020 by Türkiye Klinikleri. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).Öğe The protective effect of N-acetylcysteine against acrylamide toxicity in liver and small and large intestine tissues(Comenius University, 2015) Altinoz E.; Turkoz Y.; Vardi N.The aim of this study was to investigate the protective effects of N-acetylcysteine against acrylamide toxicity in liver and small and large intestine tissues in rats. The rats were divided into four groups. Acrylamide administration increased MDA levels in all tissues significantly (p < 0.05). But acrylamide+NAC administration decreased MDA levels significantly as compared to the acrylamide group, and lowered it to a level close to the control group values (p < 0.05). GSH levels in liver and small intestine tissues reduced significantly in the acrylamide group (p < 0.05). But acrylamide+NAC administration increased GSH levels significantly in all tissues. Whereas GST activity decreased significantly in the acrylamide group in liver and small intestine tissues as compared to the other groups (p < 0.05), the GST activity increased significantly in the acrylamide+NAC group in all tissues as compared to the acrylamide group (p < 0.05). Liver histopathology showed that the liver epithelial cells were damaged significantly in the acrylamide group. Small intestine histopathology showed that the intestinal villous epithelial cells were damaged significantly in the acrylamide group. Our results indicate that a high level of acrylamide causes oxidative damage in liver and small and large intestine tissues, while N-acetylcysteine administration in a pharmacological dose shows to have an antioxidant effect in preventing this damage (Tab. 2, Fig. 2, Ref. 66). Text in PDF www.elis.sk.Öğe The protective effect of N-acetylcysteine amide against paraquat-induced neurotoxicity(TUBITAK, 2019) Ateş B.; Vardi N.; Parlakpinar H.; Karaaslan M.G.; Yilmaz İ.; Ercal N.N-acetylcysteine amide (NACA) is a new antioxidant molecule with powerful radical scavenging properties. The aim of this study was to investigate neuroprotective effects of NACA against paraquat (PQ) toxicity in the midbrains of rats by using motor coordination tests and biochemical and histological analysis. Thirty adult Wistar albino rats were divided into three groups: Group 1: control (n = 10), Group 2: PQ (10 mg/kg) (n = 10), and Group 3: PQ (10 mg/kg) + NACA (100 mg/kg) (n = 10). NACA was administrated intraperitoneally 30 min before PQ injection. Performance was measured for a period of 28 days. The rotarod and accelerod tests were performed prior to and after the experimental period. After the experimental period, rats were sacrificed and midbrain tissues were removed. According to biochemical data, malondialdehyde levels exhibited a significant increase (P <0.05) when the PQ group was compared to the control group, whereas the NACA-treated group showed a significant decline (P < 0.05). The total glutathione levels (P < 0.01) and the glutathione peroxidase and butyrylcholinesterase activities (P < 0.05) in the NACA treatment group were significantly raised compared with the PQ group. The main finding in the rotarod and accelerod tests was that the PQ+NACA group had improved motor coordination functions, whereas the PQ group had lost motor coordination (P < 0.05). Our histological data were also outstanding and were consistent with biochemical and motor coordination results in terms of the protective role of NACA against PQ-induced neurotoxicity. © TÜBİTAKÖğe Quercetin protection against ciprofloxacin induced liver damage in rats(Taylor and Francis Ltd, 2016) Taslidere E.; Dogan Z.; Elbe H.; Vardi N.; Cetin A.; Turkoz Y.Ciprofloxacin is a common, broad spectrum antibacterial agent; however, evidence is accumulating that ciprofloxacin may cause liver damage. Quercetin is a free radical scavenger and antioxidant. We investigated histological changes in hepatic tissue of rats caused by ciprofloxacin and the effects of quercetin on these changes using histochemical and biochemical methods. We divided 28 adult female Wistar albino rats into four equal groups: control, quercetin treated, ciprofloxacin treated, and ciprofloxacin + quercetin treated. At the end of the experiment, liver samples were processed for light microscopic examination and biochemical measurements. Sections were prepared and stained with hematoxylin and eosin, and a histopathologic damage score was calculated. The sections from the control group appeared normal. Hemorrhage, inflammatory cell infiltration and intracellular vacuolization were observed in the ciprofloxacin group. The histopathological findings were reduced in the group treated with quercetin. Significant differences were found between the control and ciprofloxacin groups, and between the ciprofloxacin and ciprofloxacin + quercetin groups. Quercetin administration reduced liver injury caused by ciprofloxacin in rats. We suggest that quercetin may be useful for preventing ciprofloxacin induced liver damage. © 2015 The Biological Stain Commission.
