264 results on '"Ozlem Yilmaz"'
Search Results
252. Multiple vitellogenin yolk precursors in European sea bass (Dicentrarchus labrax)
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Cv, Sullivan, Koksoy S, Amano H, Aj, Ibáñez, Prat F, and Ozlem YILMAZ
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Fish Proteins ,DNA, Complementary ,Blotting, Western ,Egg Proteins ,Molecular Sequence Data ,Ovary ,Sequence Analysis, DNA ,Polymerase Chain Reaction ,Vitellogenins ,Tandem Mass Spectrometry ,Animals ,Bass ,Female ,Chromatography, High Pressure Liquid ,Phylogeny ,Ovum - Abstract
Trabajo presentado en el 10th International Symposium on Reproductive Physiology of Fish (Expanding the knowledge base of reproductive process: from genes to the environment), celebrado en Olhao (Portugal) del 25 al 30 de mayo de 2014., We characterized three deduced sea bass vitellogenin (Vtg) polypeptides with regard to linear and 3-dimensional (3-D) structural and functional features, verified the presence and relative contribution to the yolk of each form of Vtg, and assessed maturational degradation and potential contribution of each product lipovitellin (Lv) to the free amino acid (FAA) pool driving oocyte hydrat ion and supporting early embryonic nutrition.
253. Comparison of invasive methods and two different stool antigen tests for diagnosis of H pylori infection in patients with gastric bleeding
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Cihat Sarkis, Ebru Demiray, Ilkay Simsek, Müjde Soytürk, and Ozlem Yilmaz
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Adult ,Male ,medicine.medical_specialty ,Gastric bleeding ,Sensitivity and Specificity ,Gastroenterology ,Helicobacter Infections ,Immunoenzyme Techniques ,Feces ,fluids and secretions ,Internal medicine ,medicine ,Humans ,Urea ,In patient ,Aged ,Aged, 80 and over ,Antigens, Bacterial ,Helicobacter pylori ,biology ,Diagnostic Tests, Routine ,business.industry ,digestive, oral, and skin physiology ,General Medicine ,Middle Aged ,biology.organism_classification ,H pylori infection ,Urease ,Breath Tests ,Immunoenzyme techniques ,Immunology ,Stool antigen ,Female ,Gastrointestinal Hemorrhage ,business ,Rapid Communication - Abstract
To compare two different H pylori stool antigen tests as noninvasive diagnostic methods.The study population consisted of 22 upper gastrointestinal system bleeding patients. Urea breath test (UBT), rapid urease test (RUT) and histopathological examination were applied to all patients. Stool specimens from these patients were examined by rapid STRIP!HpSA and one step simple H pylori antigen cassette test for the detection of H pylori antigens.For these 22 patients, 15 (68.2%) were diagnosed as positive and seven (31.8%) were diagnosed negative for H pylori infection by the gold standard methods. Whereas 10 (45.5%) were positive and 12 (54.5%) were diagnosed negative by the rapid STRIP!HpSA test. The sensitivity, specificity, positive and negative predictive values were 60%, 86%, 90% and 50%, respectively. When compared to the gold standard methods, these differences were not significant. However, six patients (27.3%) were positive, and 16 (72.7%) were negative by the simple H pylori stool antigen cassette test. The sensitivity, specificity, positive and negative predictive values were 33%, 86%, 83% and 38%, respectively. Compared to the gold standard methods, the simple H pylori stool antigen cassette test results were significantly different (P = 0.012).Rapid STRIP!HpSA test could be used as a routine diagnostic tool in the microbiology laboratory for assessing clinical significance and eradication control of H pylori in upper gastrointestinal system bleeding patients.
254. Experience of post-transplant lymphoproliferative disorder (PTLD) after pediatric liver transplant: incidence, outcomes and association with food allergy
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Zeren Baris, Ozlem Yilmaz Ozbek, Faik Sarialioglu, Nihan Haberal, Figen Özçay, and Mehmet Haberal
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Transplantation ,Pediatrics ,medicine.medical_specialty ,business.industry ,Food allergy ,Incidence (epidemiology) ,medicine ,business ,medicine.disease ,Post-transplant lymphoproliferative disorder
255. A Pediatric Case with the Diagnosis of Stevens Johnson Syndrome
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Esra Özmen, Burcu Tahire Köksal, Merih Tepeoğlu, and Ozlem Yilmaz Ozbek
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myalgia ,IVIG ,Pediatric ,medicine.medical_specialty ,Parasetamol ,business.industry ,Mucocutaneous zone ,medicine.disease ,Dermatology ,Discontinuation ,Malaise ,Hypersensitivity reaction ,stomatognathic diseases ,Stevens Johnson sendromu ,Upper respiratory tract infection ,Paracetamol ,Supportive psychotherapy ,Pediatrics, Perinatology and Child Health ,medicine ,Etiology ,Stevens Johnson syndrome ,medicine.symptom ,business ,Çocuk - Abstract
Stevens-Johnson sendromu (SJS) nadir gorulen fakat hayati tehdit edebilen mukokutanoz tutulumun oldugu T hucre aracili bir asiri duyarlilik reaksiyonudur. Olgularin cogu ilaclarla tetiklenmektedir. Enfeksiyonlar, asilar, kimyasallar, sistemik ve malign hastaliklar da etiyolojide rol alabilir. Hastalik genellikle ates, halsizlik, basagrisi, miyalji, artralji ve ust solunum yolu enfeksiyonu gibi prodromal semptomlarla baslar. Stevens-Johnson sendromu icin ozel bir tedavi yontemi bulunmamaktadir. Hastalik tanisinin hizla konmasi, sebep olan ilacin erken donemde kesilmesi ve destek tedavisi tedavinin temelini olusturmaktadir. Sistemik steroid, intravenoz immunglobulin (IVIG) ve siklosporin gibi ilaclar da tedavi amaciyla kullanilmaktadir. Stevens-Johnson sendromu farkindaligini arttirmak, erken tani ve destek tedavinin onemini vurgulamak amaciyla SJS tanisi alan bir olgu sunulmustur. ABSTRACT Stevens-Johnson syndrome (SJS) is a rare but life-threatening, mucocutaneous, T cell mediated hypersensitivity reaction. Most of the cases are triggered by a drug. Infections, vaccines, chemicals, systemic or malign diseases may have also roles in etiology. Disease generally starts with prodromal symptoms including fever, malaise, headache, myalgia or upper respiratory tract infection. There is no specific treatment modality for SJS. Diagnosing the disease rapidly, discontinuation of the suspected drug immediately, and supportive therapy are the main steps in treatment. Medications like systemic steroids, intravenous immunglobulin (IVIG) and cyclosporin are also used in treatment. Our aim in presenting a case of SJS is to increase awareness of this disease, to emphasize importance of immediate diagnosis and supportive therapy.
256. P2X4 assembles with P2X7 and pannexin-1 in gingival epithelial cells and modulates ATP-induced reactive oxygen species production and inflammasome activation.
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Shu-Chen Hung, Chul Hee Choi, Najwane Said-Sadier, Larry Johnson, Kalina Rosenova Atanasova, Hanen Sellami, Özlem Yilmaz, and David M Ojcius
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Medicine ,Science - Abstract
We have previously reported that Porphyromonas gingivalis infection of gingival epithelial cells (GEC) requires an exogenous danger signal such as ATP to activate an inflammasome and caspase-1, thereby inducing secretion of interleukin (IL)-1β. Stimulation with extracellular ATP also stimulates production of reactive oxygen species (ROS) in GEC. However, the mechanism by which ROS is generated in response to ATP, and the role that different purinergic receptors may play in inflammasome activation, is still unclear. In this study, we revealed that the purinergic receptor P2X(4) is assembled with the receptor P2X(7) and its associated pore, pannexin-1. ATP induces ROS production through a complex consisting of the P2X(4), P2X(7), and pannexin-1. P2X(7)-mediated ROS production can activate the NLRP3 inflammasome and caspase-1. Furthermore, separate depletion or inhibition of P2X(4), P2X(7), or pannexin-1 complex blocks IL-1β secretion in P. gingivalis-infected GEC following ATP treatment. However, activation via P2X(4) alone induces ROS generation but not inflammasome activation. These results suggest that ROS is generated through stimulation of a P2X(4)/P2X(7)/pannexin-1 complex, and reveal an unexpected role for P2X(4), which acts as a positive regulator of inflammasome activation during microbial infection.
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- 2013
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257. Genetic transformation of an obligate anaerobe, P. gingivalis for FMN-green fluorescent protein expression in studying host-microbe interaction.
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Chul Hee Choi, Jefferson V DeGuzman, Richard J Lamont, and Özlem Yilmaz
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Medicine ,Science - Abstract
The recent introduction of "oxygen-independent" flavin mononucleotide (FMN)-based fluorescent proteins (FbFPs) is of major interest to both eukaryotic and prokaryotic microbial biologists. Accordingly, we demonstrate for the first time that an obligate anaerobe, the successful opportunistic pathogen of the oral cavity, Porphyromonas gingivalis, can be genetically engineered for expression of the non-toxic green FbFP. The resulting transformants are functional for studying dynamic bacterial processes in living host cells. The visualization of the transformed P. gingivalis (PgFbFP) revealed strong fluorescence that reached a maximum emission at 495 nm as determined by fluorescence microscopy and spectrofluorometry. Human primary gingival epithelial cells (GECs) were infected with PgFbFP and the bacterial invasion of host cells was analyzed by a quantitative fluorescence microscopy and antibiotic protection assays. The results showed similar levels of intracellular bacteria for both wild type and PgFbFP strains. In conjunction with organelle specific fluorescent dyes, utilization of the transformed strain provided direct and accurate determination of the live/metabolically active P. gingivalis' trafficking in the GECs over time. Furthermore, the GECs were co-infected with PgFbFP and the ATP-dependent Clp serine protease-deficient mutant (ClpP-) to study the differential fates of the two strains within the same host cells. Quantitative co-localization analyses displayed the intracellular PgFbFP significantly associated with the endoplasmic reticulum network, whereas the majority of ClpP- organisms trafficked into the lysosomes. Hence, we have developed a novel and reliable method to characterize live host cell-microbe interactions and demonstrated the adaptability of FMN-green fluorescent protein for studying persistent host infections induced by obligate anaerobic organisms.
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- 2011
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258. Evidence-based medicine and health technology assessments
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Fatma Ozlem Yilmaz, Esra Meltem Koç, Vildan Duman Çil, and Rabia Kahveci
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kanıta dayalı tıp ,sağlık teknolojilerinin değerlendirilmesi ,sağlık politikası ,evidence based medicine ,health technology assessment ,health policy ,Public aspects of medicine ,RA1-1270 - Abstract
Evidence based medicine (EBM) is thetransparent and rational use of the best evidence available to make decisionsabout patient care. Today, health care has become more complicated andexpensive, patient demands have increased and EBM is needed to obtain optimalresults, to reduce the differences across clinical practices, to provide highquality services and to promote an efficient and cost-effective health careculture. Evidence based medicine practices concern the health policy makers aswell as clinicians. As evidence based medicine gained importance in the fieldof health policy making the concept of “Evidence Based Health Policy” hasemerged. This intent of this concept is for health politicians to moderate thepurposes, methods and contents of health care offered to the public, to makedecisions between alternatives considering up-to-date information andconsidering the setting, and to identify and announce political goals thatbenefit the public. Today it serves as an important means of identifyingevidence based health policies and assessing health technologies.In this review, the definition,components, and grounds for evidence based medicine will be discussed, andhealth technology assessment which is one of the most important instruments ofevidence based health policies will be examined.
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- 2017
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259. Neutrophil-to-Lymphocyte Ratio, Plateletto- Lymphocyte Ratio, and Red Blood Cell Distribution Width as New Biomarkers in Patients with Colorectal Cancer
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Abdulkerim Yilmaz, Sinan Soylu, Erol Çakmak, Özlem Yönem, [Cakmak, Erol -- Yonem, Ozlem -- Yilmaz, Abdulkerim] Cumhuriyet Univ, Fac Med, Dept Gastroenterol, Sivas, Turkey -- [Soylu, Sinan] Cumhuriyet Univ, Fac Med, Dept Surg, Sivas, Turkey, and Sivas Cumhuriyet Üniversitesi
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0301 basic medicine ,business.industry ,Colorectal cancer ,Lymphocyte ,Red blood cell distribution width ,medicine.disease ,platelet-to-lymphocyte ratio ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,medicine.anatomical_structure ,colon cancer ,neutrophil-to-lymphocyte ratio ,030220 oncology & carcinogenesis ,Immunology ,Medicine ,Platelet ,In patient ,red blood cell distribution width ,Neutrophil to lymphocyte ratio ,business ,Genel ve Dahili Tıp ,Biomarkers - Abstract
WOS: 000411484400007, Objective: The incidence of colorectal cancer in developed countries has been found to increase with age. Early diagnosis and screening decrease the mortality rates in colorectal cancer. This study aimed to use inflammatory markers neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), and red blood cell distribution width (RDW)as new biomarkers for early diagnosis and screening in patients with colorectal cancer. Materials and Methods: A total of 59 patients with colorectal cancer and 59 age-and sex-matched healthy participants were included in the study. Localization, tumor node metastasis (TNM) stage, and preoperative hemoglobin levels, neutrophil counts, lymphocyte counts, platelet counts, and RDW values were obtained from medical records. Using the receiver operating characteristic (ROC) curve, the optimal cutoff levels of the biomarkers were determined. Results: NLR, PLR, and RDW were significantly higher in patients with colorectal cancer than in healthy participants (p< 0.001). According to ROC analysis, the cutoff value for NLR was 2.05 [area under the curve (AUC): 0.740, sensitivity: 78%, specificity: 66%]; the cutoff value for PLR was 130 (AUC: 0.702, sensitivity: 65%, specificity: 72%); and the cutoff value for RDW was 14 (AUC: 0.774, sensitivity: 68%, specificity: 73%). Conclusions: NLR, PLR, and RDW were found to be significantly higher in patients with colorectal cancer than in healthy participants. Therefore, it is recommended that these additional biomarkers can be used for early diagnosis and screening of colorectal cancer.
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- 2017
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260. Evaluation of platelet-to-lymphocyte ratio, red cell distribution width and neutrophil-to-lymphocyte ratio as potential biomarkers in the early detection of gastric cancer
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Cakmak, Erol, Altinkaya, Engin, Acibucu, Fettah, Yonem, Ozlem, Yilmaz, Abdulkerim, and [Cakmak, Erol -- Yonem, Ozlem -- Yilmaz, Abdulkerim] Cumhuriyet Univ, Fac Med, Dept Gastroenterol, TR-58140 Sivas, Turkey -- [Altinkaya, Engin] Kayseri Training & Res Hosp, Dept Gastroenterol, Kayseri, Turkey -- [Acibucu, Fettah] Sivas Numune Hosp, Dept Endocrinol, Sivas, Turkey
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inflammation ,neutrophil ,red cell distribution width ,lymphocyte ,Gastric cancer - Abstract
WOS: 000377959900167, Gastric cancer is the third highest malignity for cancer-related mortality worldwide. Reduction of morbidity and mortality requires early recognition and management of gastric cancer. In recent years, biomarkers reflecting the systemic inflammatory state have been used for both diagnostic and prognostic testing. Our objective was to determine whether global inflammatory markers such as platelet-to-lymphocyte ratio (PLR), red cell distribution width (RDW), and neutrophil-to-lymphocyte ratio (NLR) have clinical utility in the early diagnosis of gastric cancer. We included 53 individuals diagnosed as stomach cancer, and 53 healthy age-and sex-matched subjects. Preoperative clinical and pathological data as well as information on hemoglobin levels, neutrophil, lymphocyte and platelet counts were derived from the medical records of patients. A receiver-operating characteristic (ROC) curve was calculated to identify potential criteria for using these biomarkers in the diagnosis of gastric cancer. In patients with gastric cancer, PLR, RDW, and NLR were significantly elevated when compared to healthy control subjects (P < 0.001). The optimal diagnostic cut-off was 2.17 in the ROC curve analysis [area under the curve (AUC): 0.750, sensitivity: 73%, specificity: 61%] for NLR, 128 (AUC: 0.747, sensitivity: 72%, specificity: 64%) for PLR, and 14 (AUC: 0.768, sensitivity: 70%, specificity: 74%) for RDW. The present study suggests that NLR, PLR and RDW, which are easily obtained from a routine complete blood count may be useful as potential, biomarkers for determination of early diagnosis and prognosis of gastric cancer
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- 2016
261. Association Between the Severity of Nocturnal Hypoxia in Obstructive Sleep Apnea and Non-Alcoholic Fatty Liver Damage
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Özlem Yönem, Fettah Acibucu, Omer Tamer Dogan, Faysal Duksal, Engin Altinkaya, Abdulkerim Yilmaz, Erol Çakmak, and [Cakmak, Erol -- Yonem, Ozlem -- Yilmaz, Abdulkerim] Cumhuriyet Univ, Fac Med, Dept Gastroenterol, Sivas, Turkey -- [Duksal, Faysal] Sivas Numune Hosp, Dept Chest Dis, Sivas, Turkey -- [Altinkaya, Engin] Kayseri Training & Res Hosp, Dept Gastroenterol, Kayseri, Turkey -- [Acibucu, Fettah] Sivas Numune Hosp, Dept Endocrinol, Sivas, Turkey -- [Dogan, Omer Tamer] Cumhuriyet Univ, Fac Med, Dept Chest Dis, Sivas, Turkey
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medicine.medical_specialty ,Sleep Apnea ,Polysomnography ,Gastroenterology ,Internal medicine ,Medicine ,Hypoxia ,Hepatology ,medicine.diagnostic_test ,business.industry ,Obstructive ,Fatty liver ,Sleep apnea ,Apnea ,nutritional and metabolic diseases ,medicine.disease ,Surgery ,respiratory tract diseases ,Obstructive sleep apnea ,Non-Alcoholic Fatty Liver Disease ,Infectious Diseases ,Steatosis ,medicine.symptom ,business ,Hypopnea ,Body mass index ,Research Article - Abstract
WOS: 000368273200010, PubMed ID: 26834793, Background: Obstructive sleep apnea (OSA) is a major disease that can cause significant mortality and morbidity. Chronic intermittent hypoxia is a potential causal factor in the progression from fatty liver to nonalcoholic steatohepatitis. Objectives: This study evaluated the association between the degree of liver steatosis and severity of nocturnal hypoxia. Patients and Methods: In this study, between December 2011 and December 2013, patients with ultrasound-diagnosed NAFLD evaluated by standart polysomnography were subsequentally recorded. Patients with alcohol use, viral hepatitis and other chronic liver diseases were excluded. We analyzed polysomnographic parameters, steatosis level and severity of obstructive sleep apnea (OSA) in consideration of body mass index (BMI), biochemical tests and ultrasonographic liver data of 137 subjects. Patients with sleep apnea and AHI scores of
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- 2015
262. Association of Nonalcoholic Fatty Liver Damage and the Degree of Nocturnal Hypoxia in Obstructive Sleep Apnea
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Cakmak, Erol, Duksal, Faysal, Altinkaya, Engin, Acibucu, Fettah, Dogan, Omer T., Yonem, Ozlem, Yilmaz, Abdulkerim, and [Cakmak, Erol -- Yonem, Ozlem -- Yilmaz, Abdulkerim] Cumhuriyet Univ, Dept Gastroenterol, Sch Med, Sivas, Turkey -- [Duksal, Faysal] Numune Hosp, Dept Chest Dis, Sivas, Turkey -- [Altinkaya, Engin] Kayseri Training & Res Hosp, Dept Gastroenterol, Kayseri, Turkey -- [Dogan, Omer T.] Cumhuriyet Univ, Dept Chest Dis, Sch Med, Sivas, Turkey -- [Acibucu, Fettah] Numune Hosp, Dept Endocrinol, Sivas, Turkey
- Abstract
66th Annual Meeting of the American-Association-for-the-Study-of-Liver-Diseases (AASLD) -- NOV 13-17, 2015 -- San Francisco, CA, WOS: 000368375404460, …, Amer Assoc Study Liver Dis
- Published
- 2015
263. Increased stem cell marker expressions during the peri-implantation period in the rat endometrium: constructive role of exogenous zinc and/or progesterone.
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Sahin C, Dilsiz OY, Demiray SB, Yeniel O, Ergenoglu M, Sezer ED, Oktem G, Goker EN, and Tavmergen E
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- Animals, Endometrium drug effects, Endometrium metabolism, Extracellular Matrix drug effects, Extracellular Matrix metabolism, Female, Kruppel-Like Factor 4, Kruppel-Like Transcription Factors metabolism, Pregnancy, Progesterone administration & dosage, Progesterone blood, Rats, Wistar, Receptors, Vitronectin metabolism, Stem Cells drug effects, Transcription Factors metabolism, Vitronectin metabolism, Zinc administration & dosage, Zinc blood, Biomarkers metabolism, Embryo Implantation drug effects, Progesterone pharmacology, Stem Cells metabolism, Zinc pharmacology
- Abstract
Background: The aim of this study is to determine the effects of zinc and/or progesterone via the expression of α v β 5 integrins and Vitronectins and embryonic stem cell markers during the peri-implantation period., Methods: Four experimental groups were organized. All subjects were mated with males of the same strain to induce pregnancy; after 5 days, zinc and/or progesterone were administered. Blood levels of zinc and progesterone were determined on the sixth day and endometrial tissues were obtained in order to evaluate the immunohistochemical expression of integrins and embryonic stem cell markers., Results: The αvβ5 integrin and vitronectin expression increased in the zinc group compared with the control group and no difference in the progesterone group and zinc + progesterone group. Expression of Klf-4, Sox-2, and c-Myc was found to be increased in the zinc group compared to controls, while no difference was determined between the progesterone, zinc + progesterone, and control groups. Distinctively, expression of the embryonic stem cell marker Oct-4 was increased in all of the experimental groups., Conclusions: Expression of α v β 5 integrin, vitronectin, and embryonic stem cell markers might be increased by the administration of zinc. Our results suggest that zinc could be useful in the induction of implantation rates.
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- 2014
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264. Evaluation of hypothalamic-pituitary-adrenal axis suppression by low-dose (0.5 microg) and standard-dose (250 microg) adrenocorticotropic hormone (ACTH) tests in asthmatic children treated with inhaled corticosteroid.
- Author
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Ozbek OY, Turktas I, Bakirtas A, and Bideci A
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- Administration, Inhalation, Adolescent, Budesonide administration & dosage, Child, Female, Glucocorticoids administration & dosage, Humans, Hydrocortisone urine, Hypothalamo-Hypophyseal System drug effects, Male, Pituitary-Adrenal System drug effects, Pituitary-Adrenal System physiology, Adrenocorticotropic Hormone administration & dosage, Asthma drug therapy, Asthma physiopathology, Budesonide therapeutic use, Glucocorticoids therapeutic use, Hypothalamo-Hypophyseal System physiology
- Abstract
The aim of this study was to compare the results of low-dose (LDT) and standard-dose (SDT) ACTH tests in the assessment of adrenal function in 30 asthmatic children (mean age 9.35 +/- 1.9 years, 19 boys) who were treated with budesonide Turbohaler at conventional 400 microg or 600 microg daily doses for 8 weeks by a prospective, randomized, and open parallel study. Budesonide did not lead to any significant suppression of the hypothalamic-pituitary-adrenal (HPA) axis in either treatment group. However, when individual patient values were examined at the end point, peak cortisol concentrations after LDT were below 2 SDs of the pretreatment values in four patients (13.3%). Also, the increment in cortisol values was <200 nmol/l in all four patients. Decreased 24-hour urinary free cortisol excretion provided further evidence for HPA axis suppression in these patients. Two of these four poor responders to LDT showed normal stimulation with SDT. In conclusion, even with moderate doses and short-term use, adrenal suppression may occur in certain susceptible patients. The low-dose ACTH test is more reliable than SDT for the evaluation of such patients.
- Published
- 2006
- Full Text
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