Person: BOZKURT, SÜHEYLA
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BOZKURT
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SÜHEYLA
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Publication Metadata only Apocrine carcinomas of the breast in Turkish women: Hormone receptors, c-erbB-2 and p53 immunoexpression(ELSEVIER GMBH, 2008) KAYA, HANDAN; Kaya, Handan; Bozkurt, Sueheyla Uyar; Erbarut, Ipek; Djamgoz, Mustafa B. A.The aims of this study were twofold: (i) to determine the occurrence frequency of apocrine carcinoma of the breast (ApBCa) in Turkish breast cancer (BCa) patients; and (ii) to evaluate the expression of estrogen receptor (ER), progesterone receptor (PR), androgen receptor (AR), gross cystic disease protein-15 (GCDFP-15), c-erbB-2, and p53 in these cases. Six hundred and twenty-six cases of BCa were studied immunohistochemically (streptoavidin-biotin horseradish peroxidase method). The results of ApBCa were compared with those of invasive ductal carcinoma not otherwise specified type (IDC-NOS) cases of similar grade. Thirteen cases of ApBCa were encountered, accounting for 2.1% of all BCa cases. Immunohistochemically, ApBCa positivity was as follows: GCDFP-15 (100%), ER (39%), PR (8%), AR (54%), p53 (39%), and c-erbB-2 (85%). In the IDC-NOS group, GCDFP-15* was expressed in less than 50% of the tumors. The occurrence frequencies of the other markers were as follows: ER (69%), PR (69%)*, AR (46%), c-erbB-2 (0%)*, and p53 (31%), (*) indicating significant differences between the two groups. For Turkish BCa patients, (i) the occurrence rate of ApBCa (2.1%) was high; and (ii) the following combination would allow for an immunohistochemical identification of ApBCa: GCDFP-15(+), c-erbB-2(+), and PR-. (C) 2008 Elsevier GmbH. All rights reserved.Publication Metadata only Whey feeding suppresses the measurement of oxidative stress in experimental burn injury(SPRINGER, 2006) YALÇIN, AHMET SUHA; Oner, OZ; Ogunc, AV; Cingi, A; Uyar, SB; Yalcin, AS; Aktan, AOPurpose:Burns cause thermal injury to local tissue and trigger systemic acute inflammatory processes, which may lead to multiple distant organ dysfunction. We investigated the protective effect of dietary whey supplementation on distant organs in a rat model. Methods:Forty-eight rats were divided into six groups of eight: groups 1 and 2 were the controls, fed a standard diet and a whey-supplemented diet, respectively; groups 3 and 4 were fed a standard diet and subjected to burn injury; and groups 5 and 6 were fed a whey-supplemented diet and subjected to burn injury. We measured the oxidative stress variables, as well as glutathione in the liver and kidney, and histologically examined skin samples obtained 4h (groups 3 and 5) and 72h (groups 4 and 6) after burn injury. Results:Glutathione (GSH) levels remained the same in the liver but were slightly elevated in the kidneys after burn injury in the rats fed a standard diet. Whey supplementation caused a significant increase in hepatic GSH levels 4h after burn injury. Moreover, there was a significant rebound effect in the liver and kidney GSH levels after 72h and whey supplementation potentiated this effect. Hepatic and renal lipid peroxide levels were also increased 4h after burn injury in the rats fed a standard diet. Whey supplementation significantly suppressed the burn-induced increase in hepatic and renal lipid peroxide levels. Histological examination revealed that although whey supplementation resulted in decreased subepidermal inflammation, the indicators of wound healing and collagen deposition were not improved. Conclusion:Whey pretreatment suppressed hepatic and renal oxidative stress measurements after experimental burn injury.Publication Metadata only Effect of hyperbaric oxygen therapy on cerebral vasospasm: a vascular morphometric study in an experimental subarachnoid hemorrhage model(TAYLOR & FRANCIS LTD, 2014) ZİYAL, MUSTAFA İBRAHİM; Celik, Ozgur; Bay, Husniye Hacioglu; Arslanhan, Ayca; Oroglu, Bengusu; Bozkurt, Suheyla Uyar; Sehirli, Umit Suleyman; Ziyal, Mustafa IbrahimThis study was undertaken to investigate the preventive or therapeutic effect of hyperbaric oxygen therapy (HBOT) on cerebral vasospasm following experimental subarachnoid hemorrhage (SAH). Twenty rabbits were assigned randomly to one of four groups. Animals in Group I were not subjected to SAH or sham operation (control group, n = 5). Animals in Group II were subjected to sham operation and received no treatment after the procedure (sham group, n = 5). Animals in Group III were subjected to SAH and received no treatment after SAH induction (SAH group, n = 5). Animals in Group IV were subjected to SAH and received five sessions of HBOT at 2.4 atmospheres absolute (ATA) for 2 h (treatment group, n = 5). Animals were euthanized by perfusion and fixation 72 h after procedures. Basilar artery vasospasm indices, arterial wall thicknesses, and cross-sectional luminal areas were evaluated. Statistical comparisons were performed using Kruskal-Wallis and Mann-Whitney U tests. Mean basilar artery vasospasm index in the treatment group was significantly smaller than in the SAH group. Mean basilar artery wall thickness in the treatment group was significantly smaller than in the SAH group. Mean basilar artery cross-sectional luminal area in the treatment group showed an increase relative to the SAH group, but this difference remained statistically insignificant. Our results demonstrated that repeated application of HBOT at 2.4 ATA for 2 h attenuated vasospastic changes such as increased vasospasm index and arterial wall thickness. HBOT is thus a promising candidate for SAH-induced vasospasm. Further studies are needed to evaluate maximal effect and optimal application regimen.Publication Metadata only Effects of Ozone on Injury after Gamma Knife Radiosurgery(ELSEVIER SCIENCE INC, 2021) ÜNAL YILDIRIM, SEMRA; Emon, Selin Tural; Unal, Semra; Arslanhan, Ayca; Bozkurt, Suheyla Uyar; Meric, Zeynep Cingu; Ziyal, IbrahimBACKGROUND: At present, gamma knife radiosurgery plays an important role in neurosurgical procedures. Gamma knife radiosurgery has been used to treat many types of brain tumors and as a functional intervention. However, gamma knife treatment has a devastating effect on the normal brain parenchyma surrounding the target point. It causes increased vascular permeability, vasodilation, and swelling in endothelial cells. Ozone has antioxidant, antiapoptotic, and anti-inflammatory effects in the body. Thus, we evaluated the radioprotective effects of ozone in rats undergoing gamma knife radiation. METHODS: In the present study, 24 Sprague-Dawley male rats weighing 250-300 g in 3 groups of 8 rats each were used. The rats were selected randomly. The control group did not receive any gamma knife radiation. The other 2 groups received 50 Gy of radiation, with 1 group given ozone treatment and the other group not given ozone treatment after gamma knife radiosurgery. At 12 weeks after gamma knife radiation, the rats were sacrificed with high-dose anesthetic agents and the tissues prepared for evaluation. The slides were evaluated for necrosis, vacuolization, glial proliferation, and vascular proliferation using hematoxylin-eosin staining. Vascular endothelial growth factor (VEGF) and extracellular matrix metalloproteinase inducer (also known as CD147) were evaluated using immunohistochemical staining. RESULTS: VEGF expression in glial tissue was significantly less in the group receiving ozone (chi(2) = 15.00; df = 4; P = 0.005) compared with the group that had not received ozone and was similar to the expression in the control group. CONCLUSIONS: The lower expression of VEGF in the group receiving ozone might cause less edema in the surrounding tissue owing to less degradation of vascular permeability in the rat brain tissue.