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Öğe The effects of pulsed and sinusoidal electromagnetic fields on E-cadherin and type IV collagen in gingiva: A histopathological and immunohistochemical study(Wroclaw University of Medicine, 2013) Dogru A.G.; Tunik S.; Akpolat V.; Dogru M.; Saribas E.E.; Kaya F.A.; Nergiz Y.Background. The potential beneficial effects of extremely low frequency pulsed and sinusoidal electromagnetic fields have been shown on many tissues. Gingival epithelium plays an important role in immunosurveillance of the periodontal tissues. The epithelium acts as a mechanical barrier through cell junctions such as E-cadherin. Objectives. Investigation of the effects of extremely low frequency magnetic fields on gingiva. Material and Methods. Twenty-seven male Wistar albino rats were used. The rats were divided into three groups: control group (n = 9), SEMF group (n = 9), PEMF group (n = 9). The SEMF and PEMF (pulse time: 25 ?sn, pulse frequency: 50 Hz) groups were subjected to 1.5 mT, 50 Hz, exposure 6 h a day, 5 days a week for 28 days in methacrylate boxes. The gingival tissue pieces processed for routine histological and immunohistochemical examination and tissue sections were stained with H-E and Masson trichrome. In addition, E-cadherin and type IV collagen expressions were examined immunohistochemically. Results. Intraepithelial lymphocytes and proliferation of epithelial cells increased in both electromagnetic field groups. The over-expressions of E-cadherin on gingival epithelium was detected in the PEMF and SEMF groups. The expression level of type IV collagen was not significant between the control and electromagnetic field treated groups, except for a significant increase in the basal cell layer of the PEMF group, as compared to the control and SEMF groups. Conclusions. PEMF and SEMF have a local pro-inflammatory effect on gingiva, leading to an increase in E-cadherin level but not type IV collagen. Both PEMF and SEMF can be used as a supportive device in the treatment of gingival diseases, especially those which lead to defects in the epithelial barrier. © Copyright by Wroclaw Medical University.Öğe Ethyl pyruvate prevents ischemia reperfusion injury in isolated perfused rat heart(2013) Akkoc H.; Tunik S.; Kelle I.; Gurkan A.; Erdogmus Z.; Simsek S.; Erdinc M.The aim of the present study was to investigate the protective effect of ethyl pyruvate (EP) against ischemia reperfusion (I/R) injury in isolated rat heart. Male Sprague-Dawley rats were divided into three groups (n = 8); Group 1: Control group, Group 2: I/R, Group 3: I/R+EP. Ischemia was produced for 30 min by blocking the perfusion with Krebs Henseleit solution and it was followed by reperfusion for 60 min. In group 3, EP (2 mmol/L) was added into Krebs Henseleit solution after stabilization period. EP did not change the number of ?-smooth muscle actin positive vessels and expression of Bcl-2 and desmin. Treatment with EP significantly reduced I/R induced extension in infarct size (p < 0.001) and release of lactate dehidrogenase (p < 0.001) and creatine phosphokinase (p < 0.05). Myocardial I/R injury significantly increased oxidative stress index and malondialdehyde, total oxidant status levels and significantly decreased paraoxonase actvity and total antioxidant status (p < 0.05). On the other hand, alterations in these biochemical indices due to I/R injury were attenuated by EP treatment (p < 0.01). These results show that ethyl pyruvate prevents ischemia reperfusion injury in isolated perfused rat heart.Öğe Investigation of functional sperm membrane integrity after consequence of anti–hypoosmotic swelling test technique: An electron microscopic study(Journal of Reproductive Medicine, Inc., 2015) Tutsi Y.; Akkus M.; Tunik S.; Nergiz Y.; Kaplanoglu I.; Nasir Y.OBJECTIVE: Infertility is described as the inability of a couple to conceive after 1 year of unprotected intercourse. Male factor is assumed to be responsible for 50% of cases of infertile couples. It is a common clinical problem, affecting approximately 13– 15% of couples worldwide. In this study we aimed to investigate the effects of hypoosmotic swelling (HOS) and anti-HOS tests on sperm membrane integrity at the ultrastructural level. STUDY DESIGN: Twenty-nine infertile and 10 fertile men were included in this study. The fertile and infertile subjects were classified according to Kruger and WHO criterion. All semen samples were examined and analyzed based on WHO guidelines. Sperm viability was determined by using the eosin Y staining method. After HOS and anti-HOS tests were applied, the samples were evaluated at the ultrastructural level. RESULTS: Normal structural features of all regions of sperm were observed in sections of sham normospermia. Some histopathological changes were seen in HOS and anti-HOS group sections. CONCLUSION: The HOS procedure was found not to cause degenerative changes in the sperm ultrastructure. The anti-HOS procedure can be applied in normospermic and oligospermic groups. © Journal of Reproductive Medicine®, Inc.Öğe Mucinous tumors of the ovary: Analysis of 38 cases(2001) Yaldiz M.; Uzunlar A.K.; Kilinç N.; Yalinkaya A.; Akkuş M.; Tunik S.Ovarian mucinous tumors stem from ovarian surface epithelium and are divided into benign, borderline and malignant. It is difficult to differentiate borderline and malignant mucinous tumors. Thirty-eight cases of ovarian mucinous tumors which were diagnosed at the Pathology Department of Dicle University Medical Faculty were reviewed. Of these, 18 (47.3%), six (15.7%) and 14 (36.8%) were benign, borderline and malignant, respectively. The patients' ages ranged from 18 to 67 (average 44.5) years. Bilaterality was detected in 1/18 (5.5%), 0/6 and 4/14 (28.5%) of benign, borderline and malignant mucinous tumors, respectively. Mean tumor size was 26.4 cm. Microscopically, there was no stratification in the benign tumors. The borderline tumors had papillary infoldings and 2-3 layers of atypical epithelial cells but no invasion of the stroma. Malignant tumors had four or more layers of atypical epithelial cells and stromal invasion.
