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Ceran C.,Ataturk Training and Research Hospital
Annals of Plastic Surgery | Year: 2016

ABSTRACT: Tamoxifen is an estrogen receptor modulator and has been shown to increase risk for microvascular flap complications. This study aimed to investigate the clinical and histopathological effects of tamoxifen use in venous microvascular anastomosis model in rats. The role of vitamin E combination therapy and discontinuing tamoxifen therapy preoperatively were also evaluated.Forty rats were equally divided into 4 groups as follows: group 1 was given saline by oral gavage, group 2 was given tamoxifen citrate, group 3 was given tamoxifen citrate and vitamin E, and in group 4, tamoxifen citrate was given everyday except between days 12 and 16. In each group, femoral veins were dissected in each side and end-to-end anastomosis was performed in one side. Clinical and histopathological evaluations were performed. The ratio of total endothelial area to total vein area in a cross-sectional view of the vein was evaluated and compared.All veins with anastomosis in postoperative 15 minutes were found to be patent. In postoperative 1 week in groups 1 to 4, visible thrombus were present in 1, 3, 2, and 3 samples, respectively. Vitamin E group showed similar histopathological findings with control group. The ratio of endothelial layer to total vein cross-sectional area was increased in groups 2 and 4 in all samples. The increase was statistically significant between groups 2NA and 3NA (P = 0.023) and 2A and 1A (P = 0.006).Chronic tamoxifen consumption in the presence of anastomosis have led to prominent endothelial proliferation in rat femoral veins. Vitamin E combination therapy reversed this endothelial proliferation and should be focused in future studies. Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved. Source


Algin O.,Ataturk Training and Research Hospital
Japanese journal of radiology | Year: 2010

The aim of this study was to examine the structural-neurochemical abnormalities of the frontal white matter (FWM), deep gray matter nuclei, and pons in patients with Wilson's disease (WD) using proton magnetic resonance spectroscopy (MRS) and diffusion-weighted imaging (DWI). Nine patients with WD and 14 age-matched controls were examined with MRS. N-Acetylaspartate (NAA), choline (Cho), and creatine (Cr) peaks were calculated. DWI scans from six WD patients and six controls were also obtained. The relative metabolite ratios and apparent diffusion coefficient (ADC) values of the WD patients were compared to those of the control subjects by using statistical measures. Measurements in the thalamus and pons showed significantly lower NAA/Cho and NAA/Cr ratios in the WD group than in the control group (P < 0.05). Thalamic and pontine Cho/Cr ratios in the patient group were significantly higher than those of the control group (P < 0.05). No statistically significant relation was found between the patient and control groups as a result of the MRS examinations of FWM and all ADC measurements (P > 0.05). MRS is a noninvasive, valuable modality for detecting structural-neurochemical changes of the brain stem and deep gray matter in patients with WD. The contribution of DWI in these patients is limited. Source


Algin O.,Ataturk Training and Research Hospital
Medical Hypotheses | Year: 2011

Tc-99m-MAG3 (tubular agent) provides high imaging quality and extraction efficiency; and has become one of the most widely used agent for scintigraphic examinations of urinary system pathologies and renal transplants. Recently, it was reported that functional magnetic resonance urography (FMRU) can be sufficient in detection of urinary tract obstruction, renal artery stenosis, calculation of kidney functions and evaluation of renal transplants. However the pharmacokinetics of magnetic resonance (MR) contrast-media used in FMRU and Tc-99m-MAG3 differs from each other. This may cause discordant results between the FMRU and most of the scintigraphic studies. To our knowledge, there is no contrast-media which is specific for FMRU. A kidney specific contrast material can be developed for FMRU studies as well. MAG3 is a good candidate for this chelation. In conclusion, MR imaging (MRI) will be the most useful and important technique for morphologic-functional evaluation of urinary system. FMRU examinations performed with MAG3 chelated gadolinium can be sufficient for the complete evaluation of urinary tract even in patients with impaired renal functions (" all in one MRI" ). MRI has some important advantages including no risk for radiation exposure, high temporal and spatial resolution, no need for nephrotoxic contrast agent; besides being a fast and feasible technique. Gadolinium-containing contrast agents may cause a life-threatening adverse reaction known as nephrogenic systemic fibrosis in patients with severe renal impairment, but Gd-MAG3 may reduce the risk of nephrogenic systemic fibrosis due to its higher extraction capacity and other features. © 2011 Elsevier Ltd. Source


Ozdemir O.,Ataturk Training and Research Hospital
Rheumatology International | Year: 2011

The aim of this study was to evaluate quality of life (QOL) in patients with ankylosing spondylitis (AS) and to determine the relationships between QOL and clinical variables including spinal mobility, disease activity and functional status. Forty-eight adult patients who fulfilled the modified New York criteria for AS were included in the study. After detailed physical examination, disease-specific instruments: the Bath ankylosing spondylitis disease activity index (BASDAI) and the Bath ankylosing spondylitis functional index (BASFI) were applied. QOL was assessed using short form-36 (SF-36). The mean age of the patients was 37.0 ± 9.7 years and the mean duration of symptoms was 11.7 ± 8.4 years. Most affected domains of SF-36 were bodily pain, vitality, and physical role, respectively. No significant correlations were found between SF-36 subgroup scores and chest expansion, wall-tragus distance, chin-sternum distance, and floor-finger tip distance. Only modified Schober correlated with two SF-36 domains: physical role and bodily pain. BASDAI and BASFI scores had significant negative correlations with all SF-36 domains except for general health. Identification of QOL in patients with AS is very important in evaluation of illness-related sufferings and development of new management strategies. © 2010 Springer-Verlag. Source


Baskin Y.,Dokuz Eylul University | Yigitbasi T.,Ataturk Training and Research Hospital
Current Genomics | Year: 2010

Despite the lifetimes that increased in breast cancers due to the the early screening programs and new therapeutic strategies, many cases still are being lost due to the metastatic relapses. For this reason, new approaches such as the proteomic techniques have currently become the prime objectives of breast cancer researches. Various omic-based techniques have been applied with increasing success to the molecular characterisation of breast tumours, which have resulted in a more detailed classification scheme and have produced clinical diagnostic tests that have been applied to both the prognosis and the prediction of outcome to the treatment. Implementation of the proteomics-based techniques is also seen as crucial if we are to develop a systems biology approach in the discovery of biomarkers of the early diagnosis, prognosis and prediction of the outcome of the breast cancer therapies. In this review, we discuss the studies that have been conducted thus far, for the discovery of diagnostic, prognostic and predictive biomarkers, and evaluate the potential of the discriminating proteins identified in this research for clinical use as breast cancer biomarkers. © 2010 Bentham Science Publishers Ltd. Source

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