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ugur sahin

Ugur Sahin, Klara Dalva, Funda Gungor, Celalettin Ustun, Meral Beksac
Impact of donor-recipient killer immunoglobulin-like receptor (KIR) gene-gene matching on transplant outcomes is still inconclusive. Recent data suggest that killer cell immunoglobulin-like receptor (KIR) regulated natural killer cell (NK cell) activity may contribute to graft versus leukemia (GvL) effects and graft versus host disease (GvHD) after allogeneic hematopoietic stem cell transplantation (allo-HSCT). This case-control study aims to evaluate the effects of both aKIR and iKIR donor-recipient genotype matching on the outcomes of T cell replete HLA-identical sibling allo-HSCTs in a homogenous young patient population with myeloid leukemias...
March 16, 2018: Annals of Hematology
Hamza Sunman, Uğur Canpolat, Hikmet Yorgun, Adem Özkan, Muhammet Ulvi Yalçın, Tülin Bayrak, Levent Şahiner, Ergün Barış Kaya, Asuman Özkara, Kudret Aytemir, Ali Oto
OBJECTIVE: Cardiac resynchronization therapy (CRT) induces structural and electrical reverse remodeling of the failing heart. However, the association between native QRS narrowing and cardiac fibrosis markers has not been investigated in patients with an implanted CRT device. METHODS: A total of 41 symptomatic patients diagnosed with systolic heart failure who underwent CRT implantation were included in this study. Electrocardiogram findings and cardiac fibrosis marker levels [galectin-3, growth-differentiation factor-15 (GDF-15) and procollagen III N-terminal propeptide (P3TD)] were collected before and 12 months after initiation of biventricular pacing...
March 2018: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
Sevtap Hekimoglu Sahin, Beyhan Karamanlioglu, Mehmet Turan Ina, Huseyin Ugur, Tolgay Akıncı, Hakan Tagrikulu, Banu Tutunculer
Tracheal intubation is performed as part of daily routine in the operating room, rarely with complications. However, management of airway for cases such as a penetrating neck trauma case might constitute exceptions, in which cases the stabilization of the neck to prevent any further neural damage is a significant source of concern for the anesthesiologist. Generally, intubation techniques for penetrating neck trauma were planned according to the initial position of patients. To our knowledge, this is the first case report of alterated the position of the patient during the anesthesia induction for direct laryngoscopy...
January 2018: Asian Journal of Neurosurgery
Marcus Schmidt, Veronika Weyer-Elberich, Jan G Hengstler, Anne-Sophie Heimes, Katrin Almstedt, Aslihan Gerhold-Ay, Antje Lebrecht, Marco J Battista, Annette Hasenburg, Ugur Sahin, Konstantine T Kalogeras, Pirkko-Liisa Kellokumpu-Lehtinen, George Fountzilas, Ralph M Wirtz, Heikki Joensuu
BACKGROUND: The clinical importance of tumor-infiltrating cluster of differentiation 4 (CD4) T cells is incompletely understood in early breast cancer. We investigated the clinical significance of CD4, forkhead box P3 (FOXP3), and B cell attracting chemokine leukocyte chemoattractant-ligand (C-X-C motif) 13 (CXCL13) in early breast cancer. METHODS: The study is based on the patient population of the randomized FinHer trial, where 1010 patients with early breast cancer were randomly allocated to adjuvant chemotherapy containing either docetaxel or vinorelbine, and human epidermal growth factor receptor 2 (HER2)-positive patients were also allocated to trastuzumab or no trastuzumab...
February 26, 2018: Breast Cancer Research: BCR
Kadri Murat Gurses, Duygu Kocyigit, Muhammed Ulvi Yalcin, Hande Canpinar, Banu Evranos, Ugur Canpolat, Hikmet Yorgun, Levent Sahiner, Dicle Guc, Kudret Aytemir
BACKGROUND: Atrial fibrillation(AF) is the most common sustained arrhythmia. Its most feared sequelae are stroke and peripheral thromboembolism due to atrial thrombi formation. Mechanisms underlying the relationship between platelet activation and left atrial thrombi have not been clearly elucidated yet. We aimed to investigate whether immune-mediated platelet activation occurred in AF patients in this cross-sectional study. METHODS: Persistent and paroxysmal AF patients who underwent cryoballoon-based AF ablation between March 2015 and July 2016 were included as the patient group...
January 8, 2018: Cytokine
Vedat Hekimsoy, Ergun Barıs Kaya, Ali Akdogan, Levent Sahiner, Banu Evranos, Ugur Canpolat, Kudret Aytemir, Necla Özer, Lale Tokgozoglu
Systemic sclerosis (SSc) is a generalized connective tissue disorder, and SSc patients are at risk of developing pulmonary arterial hypertension (PAH). The aims of this study are to evaluate the right ventricular regional systolic function using two-dimensional speckle-tracking echocardiography (2D STE) and to determine the predictive ability of peak longitudinal systolic strain (PLSS) at the RV lateral wall for PAH in SSc patients. 80 SSc patients (mean age 51 ± 12 years) were included in the study. Echocardiography and 2D STE were performed at baseline and after 12 months...
January 10, 2018: International Journal of Cardiovascular Imaging
Aynur Sahin, Mualla Aylin Arici, Yeliz Yilmaz, Sule Kalkan, Nergiz Durmus, Bekir Ugur Ergur, Ilkay Yakut Aksu, Neşe Atabey, Yesim Tuncok
Amanita phalloides species mushrooms containing alpha-amanitin (α-AMA) are responsible for the majority of fatal mushroom intoxications and can lead to severe poisonings resulting in hepatotoxicity and acute hepatic failure. Existing antidotes, such as silibinin, are not sufficiently effective in the prevention and/or resolution of α-AMA-induced hepatotoxicity. We investigated the effects of resveratrol on α-AMA-induced hepatotoxicity and compared with silibinin, a known antidote using in vivo and in vitro toxicity models...
December 29, 2017: Basic & Clinical Pharmacology & Toxicology
Annette B Vogel, Laura Lambert, Ekaterina Kinnear, David Busse, Stephanie Erbar, Kerstin C Reuter, Lena Wicke, Mario Perkovic, Tim Beissert, Heinrich Haas, Stephen T Reece, Ugur Sahin, John S Tregoning
New vaccine platforms are needed to address the time gap between pathogen emergence and vaccine licensure. RNA-based vaccines are an attractive candidate for this role: they are safe, are produced cell free, and can be rapidly generated in response to pathogen emergence. Two RNA vaccine platforms are available: synthetic mRNA molecules encoding only the antigen of interest and self-amplifying RNA (sa-RNA). sa-RNA is virally derived and encodes both the antigen of interest and proteins enabling RNA vaccine replication...
December 5, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
Bora Özveren, Murat Tugrul Eren, Hakan Özveri, Uğur Altuğ, Ahmet Şahin
Objectives: To assess treatment effectiveness and safety of bilateral same-session ureterorenoscopy (BSSU) for the management of stone disease involving the entire urinary system. Patients and methods: We reviewed the records of 64 patients who underwent BSSU for the treatment of bilateral ureteric and/or kidney stones. Size, number, location per side, and the total burden of stones were recorded. Data on stenting, lithotripsy, and stone retrieval, and details of hospital stay and operation times were investigated...
December 2017: Arab Journal of Urology
Özge Canli, Adele M Nicolas, Jalaj Gupta, Fabian Finkelmeier, Olga Goncharova, Marina Pesic, Tobias Neumann, David Horst, Martin Löwer, Ugur Sahin, Florian R Greten
Increased oxidative stress has been suggested to initiate and promote tumorigenesis by inducing DNA damage and to suppress tumor development by triggering apoptosis and senescence. The contribution of individual cell types in the tumor microenvironment to these contrasting effects remains poorly understood. We provide evidence that during intestinal tumorigenesis, myeloid cell-derived H2 O2 triggers genome-wide DNA mutations in intestinal epithelial cells to stimulate invasive growth. Moreover, increased reactive oxygen species (ROS) production in myeloid cells initiates tumor growth in various organs also in the absence of a carcinogen challenge in a paracrine manner...
December 11, 2017: Cancer Cell
Antje Ziller, Sara S Nogueira, Eva Hühn, Sergio S Funari, Gerald Brezesinski, Hermann Hartmann, Ugur Sahin, Heinrich Haas, Peter Langguth
Insertion of high molecular weight messenger RNA (mRNA) into lyotropic lipid phases as model systems for controlled release formulations for the mRNA was investigated. Low fractions of 1,2-dioleoyl-3-trimethylammonium-propane (DOTAP) were used as an anchor to load the mRNA into a lamellar lipid matrix. Dispersions of zwitterionic lipid in the aqueous phase in the presence of increasing fractions of mRNA and cationic lipid were prepared, and the molecular organization was investigated as a function of mRNA and cationic lipid fraction...
February 5, 2018: Molecular Pharmaceutics
Serkan Asil, Barış Kaya, Uğur Canpolat, Hikmet Yorgun, Levent Şahiner, Cem Çöteli, Anıl Arat, Kudret Aytemir
AIMS: Percutaneous septal reduction therapy by either alcohol or nonalcohol agents is an alternative approach to surgery in drug-refractory symptomatic patients with hypertrophic obstructive cardiomyopathy (HOCM). Nonalcohol agents have some advantages and disadvantages over alcohol during the procedure. Nowadays, a novel non-alcohol agent, named as Ethylene-vinyl alcohol (EVOH) copolymer (Onyx® and Squid® ), is used during septal ablation. Thus, in this study, we aimed to evaluate both acute and long-term efficacy and safety profile of EVOH during septal ablation in HOCM...
December 5, 2017: Catheterization and Cardiovascular Interventions
Stefan Hutzler, Stephanie Erbar, Robert A Jabulowsky, Jan R H Hanauer, Jürgen H Schnotz, Tim Beissert, Bianca S Bodmer, Regina Eberle, Klaus Boller, Thorsten Klamp, Ugur Sahin, Michael D Mühlebach
Recombinant vaccine strain-derived measles virus (MV) is clinically tested both as vaccine platform to protect against other pathogens and as oncolytic virus for tumor treatment. To investigate the potential synergism in anti-tumoral efficacy of oncolytic and vaccine properties, we chose Ovalbumin and an ideal tumor antigen, claudin-6, for pre-clinical proof of concept. To enhance immunogenicity, both antigens were presented by retroviral virus-like particle produced in situ during MV-infection. All recombinant MV revealed normal growths, genetic stability, and proper expression and presentation of both antigens...
December 4, 2017: Scientific Reports
Emine Kılıçkaya Selvi, Uğur Şahin, Serkan Şahan
This method was developed for the determination of trace amounts of aluminum(III) in dialysis concentrates using atomic absorption spectrometry after coprecipitation with lanthanum phosphate. The analytical parameters that influenced the quantitative coprecipitation of analyte including amount of lanthanum, amount of phosfate, pH and duration time were optimized. The % recoveries of the analyte ion were in the range of 95-105 % with limit of detection (3s) of 0.5 µg l-1 . Preconcentration factor was found as 1000 and Relative Standard Deviation (RSD) % value obtained from model solutions was 2...
2017: Iranian Journal of Pharmaceutical Research: IJPR
Serkan Şahan, Uğur Şahin, Mustafa Başaran, Oğuzhan Uzun, Adem Güneş
3,5 - Dimethylpyrazolium glyceroborate is a nitrification inhibitor (a member of pyrazole derivatives) used for the fixation of nitrogen into the soil. In this study, an HPLC-DAD method was developed and validated for determination of 3,5 - dimethylpyrazole in order to determine 3,5 - dimethylpyrazolium glyceroborate in fertilizer samples. For method development, analytical parameters like type of eluent solution and column filling material and device parameters like eluent flow rate, column oven temperature and measurement wavelength were all optimized...
November 15, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
Irene C Schneider, Jessica Hartmann, Gundula Braun, Jörn Stitz, Thorsten Klamp, Mahjoub Bihi, Ugur Sahin, Christian J Buchholz
Virus-like particles (VLPs) displaying foreign antigens have become an important tool in vaccination including the induction of immune responses against self-antigens. Claudin 6 (CLDN6) has been identified as tumor-associated antigen and is therefore a potential target for tumor vaccination strategies. However, as tetra-membrane spanning protein its incorporation into VLPs while preserving a native fold is challenging. Here, we attempted the incorporation of a panel of engineered CLDN6 variants into the membrane of retrovirus-derived VLPs...
November 13, 2017: Biotechnology Journal
Muslum Sahin, Lutfi Ocal, Ali Kemal Kalkan, Alev Kilicgedik, Mehmet Emin Kalkan, Burak Teymen, Ugur Arslantas, Mehmet Muhsin Turkmen
Introduction: Although percutaneous coronary intervention is an accepted "first-line" therapy in acute ST elevation myocardial infarction (STEMI) in general population, few data are available on the short- and long-term outcomes of very old patients (age >90 years). Our aim is to evaluate and compare the short and long-term outcomes after primary percutaneous coronary intervention (PPCI) or medical therapy in nonagenarian patients with STEMI. Methods: We retrospectively identified patients older than 90 years old in our clinic, with acute STEMI who presented within 12 hours after symptoms onset, either underwent PPCI or medically treated...
2017: Journal of Cardiovascular and Thoracic Research
Esra Akcan, Sultan Özkurt, Garip Sahin, Ahmet Ugur Yalcin, Baki Adapinar
PURPOSE: Various factors can affect blood and tissue levels of trace elements in patients with end-stage renal disease. There are a few studies showing hyperintensity of basal ganglia associated with manganese deposition in hemodialysis (HD) patients. The present study aimed to investigate the intensity changes as markers of manganese deposition in the basal ganglia and to demonstrate their association with blood manganese levels using ICP/MS technique in HD, peritoneal dialysis (PD), and renal transplant patients...
October 25, 2017: International Urology and Nephrology
Christiane R Stadler, Hayat Bähr-Mahmud, Leyla Celik, Bernhard Hebich, Alexandra S Roth, René P Roth, Katalin Karikó, Özlem Türeci, Ugur Sahin
This corrects the article DOI: 10.1038/nm.4356.
October 6, 2017: Nature Medicine
Ugur Sahin, Taner Demirer
Multiple myeloma (MM) is the leading indication of autologous hematopoietic stem cell transplantation (AHSCT) worldwide. The collection of PBSCs is the essential step for AHSCT. The limits for minimum and optimum CD34(+) cells collected have been accepted as 2 × 10(6) /kg and ≥4 × 10(6) /kg for single AHSCT; 4 × 10(6) /kg and ≥8-10 × 10(6) /kg for double AHSCT. Despite the success of conventional methods for PBSC mobilization in MM, mobilization failure is still a concern depending on patient age, duration of disease, and the type of induction therapy...
October 5, 2017: Journal of Clinical Apheresis
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