Browsing by Author "Yener, Z"

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Abdominal Malignant Mesothelioma in a Mouse
(Australian veterinary Assn, 2002) Yener, Z; Karaca, T; Yuksel, H
The Effect of Nigella Sativa (Black Seed) and Vit. E Plus Selenium in the Prevention of Liver Necrosis Experimentally Induced With Carbon Tetrachloride (Ccl4) in Rats
(Tubitak Scientific & Technological Research Council Turkey, 2003) Sahin, A; Yener, Z; Dagoglu, G; Dede, S; Oto, G; Alkan, M
The preventive effect of Nigella sativa (black seed) was investigated in rats with hepatic necrosis experimentally induced by carbon tetrachloride (CCl4). To compare the antioxidant effect of black seed, well-known antioxidants, vitamin E and selenium mineral, were used. This study was conducted on 40 rats that were divided into five groups of eight. Group A was separated as a control group and treated intraperitoneally (i.p.) with only liquid paraffin. Group B was administered i.p CCl4 in liquid paraffin. Group C was administered i.p. CCl4 in liquid paraffin and intramuscularly (i.m.) treated with vitamin E + selenium. Group D was administered i.p. CCl4 in liquid paraffin, i.m. treated with vitamin E + Se and fed ad libitum with standard rat pellets containing 10% black seed. Group E was administered i.p. CCl4 in liquid paraffin and fed ad libitum with standard rat pellets containing 10% black seed. Blood samples were drawn from the heart of the rats four times for the experimental groups and five times for the control group, one of which was at the beginning of the experiment. In blood samples, malondialdehyde (MDA), glutathione peroxidase (GSH-px), superoxide dismutase (SOD), alanine transaminase (ALT), aspartic transaminase (AST), intracellular glutathione (GSH) and ceruloplasmin analyses were performed. In group B blood samples, lipid peroxidation and antioxidant enzymes were significantly increased. The closest enzyme activities to those of the control group were found in group E. The least weight loss percentages were in group E. The least necrosis was detected in the liver samples of group D. Histopathological results were consistent with biochemical results. In conclusion, a liver necrosis preventive effect of vitamin E + selenium and black seed was observed.
Effect of Nigella Sativa on Glucose Concentration, Lipid Peroxidation, Anti-Oxidant Defence System and Liver Damage in Experimentally-Induced Diabetic Rabbits
(Blackwell verlag Gmbh, 2001) Meral, I; Yener, Z; Kahraman, T; Mert, N
This Study was carried out to investigate whether Nigella sativa could decrease the lipid peroxidation, increase the anti-oxidant defence system and also prevent the lipid-peroxidation-induced Ever damage in experimentally induced diabetic rabbits. Fifteen New Zealand male rabbits were divided into three experimental groups: control, diabetic and diabetic and N. sativa-treated. The diabetes mellitus (DM) was induced in the rabbits using 150 mg/kg of 10% alloxan. The diabetic + N. sativa-treated group was given extract of N sativa seeds orally every day for 2 months after induction of D-M. At the end of the 2-month experiment, blood samples were collected to measure malondialdehyde (MDA), glutathione (GSH), ceruloplasmin and glucose concentration, and livers were harvested for histopathological analysis, Treatment with N sativa decreased the elevated glucose and MDA concentrations, increased the lowered GSH and ceruloplasmin concentrations, and prevented lipid-peroxidation-induced Ever damage in diabetic rabbits. It was concluded that N sativa might be used in diabetic patients to prevent lipid peroxidation, increase anti-oxidant defence system activity, and also prevent liver damage.
Effects of Nigella Sativa L. on Serum Concentrations of Thyroid Hormones, Thyroid Stimulating Hormone and Glucose in Alloxaninduced Diabetic Rabbits
(veterinary Ireland, 2003) Meral, I; Yener, Z; Ozbek, H; Ustun, R
This study was designed to investigate the effect of an extract of Nigella sativa L. (NS) on the histology and function of the thyroid glands in alloxan-induced diabetic rabbits. Fifteen New Zealand male rabbits were divided into three experimental groups: control, diabetic and NS-treated diabetic. At the start of the experiment, a single intravenous injection of 10% alloxan (150 mg/kg body weight (bwt)) was given to produce diabetes mellitus (DM) in the diabetic and NS-treated diabetic groups. After DM was confirmed in the two groups, rabbits in the NS-treated group were given oral doses of 20 ml/kg bwt of the NS extract every day for two months. Then Mood samples were taken from all 15 rabbits to measure the serum concentrations of glucose, triiodothyronine (T-3), thyroxine (T-4) and thyroid stimulating hormone (TSH). The rabbits were killed and tissue samples were taken from the thyroid glands for histopathological analysis. It was found that NS treatment decreased the elevated glucose concentrations, and raised the lowered serum triiodothyronine concentrations in diabetic rabbits. There were no significant differences between groups in the histology of the thyroid glands or in the concentrations of serum T, and serum TSH. It was suggested that oral NS treatment might decrease the diabetes-induced disturbances of thyroid hormone metabolism.
Immunohistochemical Detection of Parainfluenza Type 3 Virus Antigens in Paraffin Sections of Pneumonic Caprine Lungs
(Blackwell Publishing, 2005) Yener, Z; Saglam, YS; Timurkaan, N; Ilhan, F
Pneumonia is a leading cause of loss to ruminants throughout the world. Parainfluenza type-3 virus (PI-3) is one of the most important respiratory pathogens of bovine and ovine. In this study, prevalence of PI-3 virus infection as causative agent of pneumonia in goats was investigated. For this purpose, a total of 1505 goat lungs slaughtered in Bitlis and Van slaughterhouses were grossly examined and pneumonia was detected in 74 cases (4.91%). Lesions were more frequently encountered in anteroventral lobes than caudal lobes. With the exception of verminous pneumonia observed in 32 cases, immunohistochemical examinations were performed on 42 pneumonic lungs. Formalin-fixed and paraffin-embedded lung tissue samples were immunohistochemically stained by the avidin-biotin-peroxidase complex procedure using polyclonal antibodies to detect PI-3 viral antigens. The presence of PI-3 viral antigens was detected in 28 (66.6%) of 42 pneumonic lungs. Viral antigens were found most frequently in the cytoplasm of bronchiolar epithelial cells, type II pneumocytes, and less frequently in the epithelial cells of bronchial glands, syncytial cells, alveolar macrophages, and lymphocytes and plasma cells. In conclusion, it was found that there was a close relationship between the pneumonia in goats and the presence of PI-3 viral antigens. Incidence of PI-3 virus in pneumonic lungs of goats was detected to be very high in the present study performed in the region of Bitlis and Van, Turkey.
Immunohistochemical Detection of Peste Des Petits Ruminants Viral Antigens in Tissues From Cases of Naturally Occurring Pneumonia in Goats
(Elsevier Science Bv, 2004) Yener, Z; Saglam, YS; Temur, A; Keles, H
Peste des petits ruminants (PPR) is an important viral disease of goats and sheep characterized by erosive stomatitis, enteritis, and pneumonia. But the pneumonia is the most frequently recorded lesion in PPR infections. In this study, the presence of PPR viral antigens in goat's pneumonia was investigated. For this purpose, a total of 1505 goat's lungs slaughtered in Bitlis and Van slaughterhouses were grossly examined and pneumonia was detected in 74 cases (4.91%). Lesions were more frequently encountered in anteroventral lobes than caudal lobes. Immunohistochemical (IHC) examinations were performed on 42 pneumonic lungs (except the verminous pneumonia). IHC staining of formalin-fixed, paraffin-embedded tissues were carried out by the avidin-biotin-peroxidase complex (ABC) procedure. The presence of PPR viral antigens were detected in 17 (40%) out of 42 pneumonic lungs. Viral antigens were found most frequently in the cytoplasm and rarely in the nucleus, including bronchial glands, bronchial and bronchiolar epithelial cells, type II pneumocytes, syncytial cells, and alveolar macrophages. In conclusion, it was found that there was a close relationship between the pneumonia in goats and the presence of PPR viral antigens. The PPR incidence in pneumonic lungs of goats was detected to be very high in the present study performed in the region of Bitlis and Van. (C) 2003 Elsevier B.V. All rights reserved.
Immunoperoxidase and Histopathological Examinations of Leptospiral Nephritis in Cattle
(Wiley, 2001) Yener, Z; Keles, H
This study was designed to investigate the role of leptospirae in interstitial nephritis. Sixty-eight white-spotted kidneys and 30 grossly normal kidneys from slaughtered cattle were examined histologically and immunohistochemically for the presence of Leptospira interrogans antigens. The presence of L interrogans antigens was found in 21 of 68 white-spotted kidneys and in four of 30 normal kidneys. In conclusion, the detected incidence of infection with L interrogans was not high, but there was a relationship between the presence of interstitial nephritis and leptospiral antigens.
Leiomyoma of the Urinary Bladder in a Goat
(Australian veterinary Assn, 2001) Timurkaan, N; Yener, Z; Yüksel, H
Partial Regeneration/Proliferation of the Β-Cells in the Islets of Langerhans by Nigella Sativa L. in Streptozotocin-Induced Diabetic Rats
(Tohoku Univ Medical Press, 2003) Kanter, M; Meral, I; Yener, Z; Ozbek, H; Demir, H
This experiment was carried out to investigate the effect of N. sativa L. on histopathology of pancreatic beta-cells, and blood insulin and glucose concentrations in streptozotocin-induced diabetic rats. Fifty male Wistar rats (200-250 g) were divided into two experimental groups (diabetics with no treatment and diabetics with N. sativa L. treatment), each containing twenty-five rats. Diabetes was induced in both groups by a single intraperitoneal injection of streptozotocin (STZ) (50 mg/kg). The experimental animals in both groups became diabetic within 24 hours after the administration of STZ. The rats in N. sativa L.-treated group were given the daily intraperitoneal injection of 0.20 ml/ kg of A sativa L. volatile oil for 30 days starting the day after STZ injection. Control rats received only the same amount of normal saline solution. The rats in both groups received the last injection 24 hours before the sacrification and 5 randomly-selected rats in each group were sacrificed before, and the 1, 10, 20 and 30 days after the STZ injection to collect blood and pancreatic tissue samples. The N. sativa L. treatment caused a decrease in the elevated serum glucose, an increase in the lowered serum insulin concentrations and partial regeneration/ proliferation of pancreatic beta-cells in STZ-induced diabetic rats with the elapse of the experiment. It is concluded that the hypoglycaemic action of N. sativa L. could be partly due to amelioration in the beta-cells of pancreatic islets causing an increase in insulin secretion. More studies are needed to demonstrate the exact mechanism of action of N. sativa L. on ameliorated blood glucose concentration in STZ-induced diabetes. -rats; N. sativa L.; glucose; insulin, beta-cells. (C) 2003 Tohoku University Medical Press.
A Rabbit Model for Liver Fibrosis
(Scandinavian Federation Laboratory Animal Science, 2001) Kanter, M; Yener, Z
This experiment was carried out to investigate the role of cells participating in fibrosis induced by bile-duct ligation in rabbits. Histologically, bile stasis, degeneration and focal necrosis of hepatocytes, bile ductular proliferation, and an increase of the connective tissue were seen in periportal regions. Immunohistochemically, it was found that the majority of cells observed in the fibrosis regions were positive cells (spindle cells) for alpha-smooth muscle actin (ASMA). It is suggested that the spindle cells, probably transforming from Ito cells or myofibroblasts, play an important role in the pathogenesis of hepatic fibrosis.
The Role of Antioxidant Vitamins (C and E), Selenium and Nigella Sativa in the Prevention of Liver Fibrosis and Cirrhosis in Rabbits
(M H Schaper Gmbh Co Kg, 2001) Türkdogan, MK; Agaoglu, Z; Yener, Z; Sekeroglu, R; Akkan, HA; Avci, ME
This experiment was carried out to investigate the role of antioxidants such as vitamin C and E, selenium and Nigella sativa (NS) on the prevention of carbon tetrachloride (CCl4)-induced liver fibrosis in rabbits. It was found that superoxide dismutase (SOD) values in ail of the treated groups were significantly lower than those of the control at 12(th) week of experiment (p < 0.05), while at 6(th) week and 12(th) week of experiment glutathione peroxidase (GSH-Px) values in the vitamin C treated group were significantly different from the control (p < 0.05). Histopathologically, hepatocellular necrosis, degeneration and advanced fibrosis were found in the control group. Lesions were minor and only confined to midzonal regions without centrilobular necrosis and fibrosis in the NS treated animals (group B). The lesions observed in the vitamin C treated animals (group C) were similar to that of the control group. Parenchymal changes with fibrosis were less in selenium and vitamin E treated animals (group D) than in those of the control group, but more obvious than in NS group. Histopathological findings demonstrate that NS might, at least partly, be successful in the prevention of liver fibrosis in rabbits. Vitamin E plus selenium had little therapeutic effect and vitamin C seemed to be ineffective, as far as the results of this study are concerned.
The Role of Urtica Dioica and Nigella Sativa in the Prevention of Carbon Tetrachloride-Induced Hepatotoxicity in Rats
(Wiley, 2003) Türkdogan, MK; Ozbek, H; Yener, Z; Tuncer, I; Uygan, I; Ceylan, E
The role of Nigella sativa L. (Ranunculaceae) (NS) and Urtica dioica L. was investigated (UD) in the prevention of carbon tetrachloride (CCl4) induced liver fibrosis and cirrhosis. Fifty Sprague-Dawley rats were allocated into five groups (I, IIA and B, IIIA and B) and CCl4 was injected biweekly to all groups. Group I (control, CCl4 only), group IIA and B (NS fixed oil and volatile oil), group IIIA and B (UD fixed oil and UD decoction extract) rats were killed at the end of week 12 and histopathological and immunohistochemical examinations of liver tissues were performed. In the control group, coagulation necrosis and hydropic degeneration were marked in the periacinar regions (zone 3) associated with fibrosis in the periacinar regions and in the portal tracts. In groups IIA-B and IIIA-B (NS and UD), none of the serious histopathological findings were detected except for sparse coagulation necrosis in the periacinar regions. ASMA-positive perisinusoidal cells with myofibroblastic transformation and lysosomal enzyme activity suggesting fibrogenesis were also significantly more common in the control group than in the NS and UD groups. UD and NS seem to be significantly effective in the prevention of carbon tetrachloride induced hepatotoxicity in rats. Copyright (C) 2003 John Wiley Sons, Ltd.
Serous Papillary Cystadenoma in the Ovary of a Cow
(Australian veterinary Assn, 2004) Yener, Z; Karaca, F; Alan, M
Short Communication - Alveolar Rhabdomyosarcoma of the Limb in a Sheep
(M H Schaper Gmbh Co Kg, 2001) Yener, Z
Tumor mass was detected in the skeletal musculature of the tibia in a sheep slaughtered at abattoir. Histologically, the tumor cells were in a typical alveolar pattern, and showed a cartilaginous tissue differentiation in some areas of the tumor mass. This tumor examined by avid in-biotin-peroxidase method was found to be positive for myoglobin. The diagnosis of undifferentiated alveolar rhabdomyosarcoma was based on the results of histopathology and immunohistochemistry.
Undifferentiated Ganglioneuroblastoma in a Sheep
(Academic Press Ltd Elsevier Science Ltd, 2002) Yener, Z; Kiran, MM
Ganglioneuroblastoma, presumably originating from the adrenal medulla, was found in an 18-month-old sheep. Histologically, the tumour was mainly composed of undifferentiated neuroblasts with neuropil and occasional ganglion cells. The morphological and immunohistrochemical features with respect to intermediate filament proteins and the neuroendocrine nature of the tumour are described. The neoplastic cells were positive for neuron-specific enolase, synaptophysin and vimentin. (C) 2002 Elsevier Science Ltd.