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Öğe Evaluation of TGF betal expression and comparison the thickness of different aorta layers in experimental diabetes(COMENIUS UNIV, 2011) Cuce, G.; Kalkan, S. S.; Esen, H. H.Background: It was aimed to investigate the effects of experimental diabetes on TGF beta 1 expression and tunica intima and media thickness in abdominal and thoracic aorta. Methods: Fourteen three months old female rats were divided into two groups, non-diabetic and streptozotocin (STZ) induced diabetic group. Hematoxylin-Eosin and Verhoeff's Van Gieson elastic staining and TGF beta 1 immunohistochemistry staining were performed. Abdominal and thoracic intima and media thickness of aortas were measured with the oculometer. Results: Evaluation of intima and media thickness measurements showed no significant statistical differences between non-diabetic and diabetic groups. TGF beta 1 expression increased significantly in thoracic diabetic (TD) group. Conclusion: The 60 day duration of diabetes is not sufficiently enough time for the development of pathological changes that could lead to thickening in aortic intima-media layers. TGF beta 1 expression was negative in the abdominal aorta that can predispose to the development of atherosclerosis, which could develop overtime. This finding may be interpreted as an appropriate basis for the development of atherosclerosis. In the thoracic aorta TGF beta 1 may coordinate cellular events such as tissue repair (Fig. 5, Ref. 23). Full Text in free PDF www.bmj.sk.Öğe Response to Vasoconstrictor Agents by Detrusor Smooth Muscles From Cisplatin-Treated Rats and Antioxidant Treatment(Prous Science, Sa-thomson Reuters, 2010) Atalık, Kısmet Esra; Keleş, Bahar; Uyar, Yavuz; Dündar, M. A.; Öz, M.; Esen, H. H.The effects of melatonin and quercetin on the contractile responses of cisplatin-treated rat detrusor smooth muscle were tested. Detrusor strips obtained from four separate rat groups (control, cisplatin, melatonin+cisplatin and quercetin+cisplatin) were mounted in 25 mL organ baths containing Krebs-Henseleit solution (KHS) at 37 degrees C, continuously gassed with 95% O(2) and 5% CO(2). The vasoconstriction induced by acetylcholine (ACh) and potassium chloride (KCl) were compared within the groups. Furthermore, histopathological parameters such as edema, congestion, inflammatory cells, microvascular proliferation, fibrosis, eosinophil, most cells and epithelial damage were noted. In routine experiments ACh and KCl triggered concentration-dependent contractions. Pretreatment with cisplatin increased the sensitivity but not the maximal response to ACh and KCl. In rats treated with melatonin or quercetin before cisplatin, the EC(50) values, but not the maximal response, to both agents were significantly higher than in the cisplatin-treated (CII) group. Histopathological parameters such as edema, congestion, inflammatory cells, microvascular proliferation, fibrosis, eosinophil, most cells and epithelial damage were all higher in the cisplatin-treated group than in the controls. Melatonin pretreatment significantly decreased mast cell numbers and epithelial damage when compared to cisplatin treatment alone but these effects were not recorded with quercetin pretreatment. These results demonstrate for the first time that melatonin can attenuate urinary bladder injury produced by cisplatin treatment.Öğe Vasoprotection by melatonin and quercetin in rats treated with cisplatin(NATL INST SCIENCE COMMUNICATION-NISCAIR, 2010) Atalik, K. E.; Keles, B.; Uyar, Y.; Dundar, M. A.; Oz, M.; Esen, H. H.Cisplatin-based chemotherapy has a variety of vascular side effects. The aim of the present study was to evaluate the beneficial effect of melatonin and cisplatin on the alterations in vascular reactivity and structure of cisplatin-treated rats. Phenylephrine (PHE) and KCI-caused concentration-dependent contractions of rat aorta. Pretreatment with cisplatin increased the sensitivity but not the max response to PHE and KCl. In rats treated with melatonin or quercetin before cisplatin, the EC(50) values, but not the maximal response to both agents were significantly higher than cisplatin-treated group. Compared to the control group, cisplatin-treatment significantly reduced the luminal area of the aorta. In melatonin and quercetin-treated aortas the luminal area values were significantly higher than cisplatin-treated group. The results demonstrate for the first time that melatonin and quercetin treatment may protect the aorta in cisplatin-based chemotherapy.