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Tolga Aksu, Tumer Erdem Guler, Kivanc Yalin, Ferit Onur Mutluer, Kazim Serhan Ozcan, Leonardo Calò
Enhanced parasympathetic tone may cause sinus bradycardia or pauses, transient or permanent atrioventricular block, with resultant vasovagal syncope. A substantial portion of these patients may be highly symptomatic and refractory to the conventional therapies and may require cardiac pacemaker implantation. Cardioneuroablation is a little known technique for management of patients with excessive vagal activation based on radiofrequency catheter ablation of main parasympathetic autonomic ganglia around the heart...
March 2018: American Journal of the Medical Sciences
Stuart P Weisberg, Beth H Shaz, Gizem Tumer, Chris C Silliman, Marguerite R Kelher, Claudia S Cohn
BACKGROUND: Platelets (PLTs) collected and stored in PLT additive solution Intersol (PAS-C) are presumed to reduce recipient exposure to donor plasma components; however, the effects of PAS-C on PLT supernatant composition are poorly defined. Therefore, we compared the total protein concentration, isohemagglutinin titers, and HLA antibodies in supernatants of PAS-C PLTs to plasma PLTs. STUDY DESIGN AND METHODS: Apheresis PLTs from group O blood donors were collected into either 100% donor plasma (n = 50) or a mixture of 65% PAS-C/35% donor plasma (n = 50)...
February 22, 2018: Transfusion
R Hedayati, S M Ahmadi, K Lietaert, N Tümer, Y Li, S Amin Yavari, A A Zadpoor
Magnesium and its alloys have the intrinsic capability of degrading over time in vivo without leaving toxic degradation products. They are therefore suitable for use as biodegradable scaffolds that are replaced by the regenerated tissues. One of the main concerns for such applications, particularly in load-bearing areas, is the sufficient mechanical integrity of the scaffold before sufficient volumes of de novo tissue is generated. In the majority of the previous studies on the effects of biodegradation on the mechanical properties of porous biomaterials, the change in the elastic modulus has been studied...
February 22, 2018: Journal of Biomedical Materials Research. Part A
Frédéric Brioude, Jennifer M Kalish, Alessandro Mussa, Alison C Foster, Jet Bliek, Giovanni Battista Ferrero, Susanne E Boonen, Trevor Cole, Robert Baker, Monica Bertoletti, Guido Cocchi, Carole Coze, Maurizio De Pellegrin, Khalid Hussain, Abdulla Ibrahim, Mark D Kilby, Malgorzata Krajewska-Walasek, Christian P Kratz, Edmund J Ladusans, Pablo Lapunzina, Yves Le Bouc, Saskia M Maas, Fiona Macdonald, Katrin Õunap, Licia Peruzzi, Sylvie Rossignol, Silvia Russo, Caroleen Shipster, Agata Skórka, Katrina Tatton-Brown, Jair Tenorio, Chiara Tortora, Karen Grønskov, Irène Netchine, Raoul C Hennekam, Dirk Prawitt, Zeynep Tümer, Thomas Eggermann, Deborah J G Mackay, Andrea Riccio, Eamonn R Maher
Beckwith-Wiedemann syndrome (BWS), a human genomic imprinting disorder, is characterized by phenotypic variability that might include overgrowth, macroglossia, abdominal wall defects, neonatal hypoglycaemia, lateralized overgrowth and predisposition to embryonal tumours. Delineation of the molecular defects within the imprinted 11p15.5 region can predict familial recurrence risks and the risk (and type) of embryonal tumour. Despite recent advances in knowledge, there is marked heterogeneity in clinical diagnostic criteria and care...
January 29, 2018: Nature Reviews. Endocrinology
Amirhossein Sahebkar, Yunes Panahi, Nahid Khalili, Ebrahim Sahebi, Soha Namazi, Stephen L Atkin, Muhammed Majeed
OBJECTIVE: Curcumin is a naturally occurring polyphenol derived from tumeric that has been reported to have anti-inflammatory properties with effects on adipokine and ghrelin levels. Adiponectin, leptin and ghrelin modulate energy homeostasis but each have modulatory effects on inflammatory cytokines and the immune system. Therefore this analysis was performed to investigate the effect of curcumin on adiponectin, leptin and ghrelin. METHODS: A double blind randomised control trial comparing curcumin 1000mg with 10mg of piperine daily to placebo over a 12 week period...
January 3, 2018: Current Clinical Pharmacology
Zeynep Tümer, Julia Angélica López-Hernández, Irène Netchine, Miriam Elbracht, Karen Grønskov, Lene Bjerring Gede, Jana Sachwitz, Johan T den Dunen, Thomas Eggermann
Silver-Russell syndrome (SRS) is a clinically and molecularly heterogeneous disorder involving prenatal and postnatal growth retardation, and the term SRS-like is broadly used to describe individuals with clinical features resembling SRS. The main molecular subgroups are loss of methylation of the distal imprinting control region (H19/IGF2:IG-DMR) on 11p15.5 (50%) and maternal uniparental disomy of chromosome 7 (5-10%). Through a comprehensive literature search we identified 91 patients/families with various structural and small sequence variants, which were suggested as additional molecular defects leading to SRS/SRS-like phenotypes...
December 17, 2017: Human Mutation
Y Li, J Zhou, P Pavanram, M A Leeflang, L I Fockaert, B Pouran, N Tümer, K-U Schröder, J M C Mol, H Weinans, H Jahr, A A Zadpoor
An ideal bone substituting material should be bone-mimicking in terms of mechanical properties, present a precisely controlled and fully interconnected porous structure, and degrade in the human body to allow for full regeneration of large bony defects. However, simultaneously satisfying all these three requirements has so far been highly challenging. Here we present topologically ordered porous magnesium (WE43) scaffolds based on the diamond unit cell that were fabricated by selective laser melting (SLM) and satisfy all the requirements...
December 11, 2017: Acta Biomaterialia
M K Tumer, M Demir, M Cicek
OBJECTIVE: The changes in the mouth structures due to aging cause some structural and functional changes by affecting masticatory muscles over time. The aim of this study was to evaluate the aging-related histopathologic changes and immunohistochemically assessed aquaporin 1 and 4 expressions on masseter and temporal muscles. MATERIAL AND METHODS: 14 Balb/c white mice (50-80 g) were used in this study. Group I consisted of young animals (2-month-individuals) (n = 7) and Group II consisted of older animals (18-month-old) (n = 7)...
2017: Bratislavské Lekárske Listy
Tümer Erdem Guler, Tolga Aksu, Kivanc Yalin, Sukriye Ebru Golcuk, Ferit Onur Mutluer, Serdar Bozyel
BACKGROUND: To achieve sinus rhythm, ablation of long-standing persistent atrial fibrillation (LSPAF) usually requires substrate modification in addition to pulmonary vein isolation (PVI). In the present article, we aimed to compare clinical and substrate modification effects of 2 distinct PVI strategies during stepwise ablation in patients with LSPAF: (1) Combined approach: cryoballoon (CB) for PVI and radiofrequency (RF) ablation for substrate modification and (2) RF-only approach: RF ablation for both PVI and substrate modification...
December 2017: American Journal of the Medical Sciences
Enver Ahmet Demir, Okan Tutuk, Hatice Dogan, Duygu Egeli, Cemil Tumer
The educators have underlined the importance of lecture attendance for decades. Nowadays, students have ample online educational sources, which began a debate on the necessity of in-class lectures. In the present study, we investigated the influence of lecture attendance on the exam success. To this aim, we adopted a novel approach and matched second-year medicine students' answers in three interim exams with the lectures related to those questions. Thereby, we were able to evaluate if attending lectures increases the chance of giving a correct answer to the exam question generated from the attended lecture...
December 1, 2017: Advances in Physiology Education
Isabelle Côté, Sara M Green, Drake Morgan, Christy Carter, Nihal Tümer, Philip James Scarpace
Recent evidence indicate that Melanotan II (MTII) reduces body mass independently of caloric reduction. Because MTII induces a transient hypophagia, caloric reduction is still considered a primary mechanism for MTII-mediated body mass loss. To examine the contribution of caloric reduction to long-term body mass loss in response to Melanotan II (MTII), we centrally infused MTII or vehicle in ad libitum fed (MTII and Control) animals in comparison to a group of animals that were pair-fed (PF) to the MTII group...
November 13, 2017: Canadian Journal of Physiology and Pharmacology
S M Ahmadi, R Hedayati, Y Li, K Lietaert, N Tümer, A Fatemi, C D Rans, B Pouran, H Weinans, A A Zadpoor
Additive manufacturing (AM) techniques enable fabrication of bone-mimicking meta-biomaterials with unprecedented combinations of topological, mechanical, and mass transport properties. The mechanical performance of AM meta-biomaterials is a direct function of their topological design. It is, however, not clear to what extent the material type is important in determining the fatigue behavior of such biomaterials. We therefore aimed to determine the isolated and modulated effects of topological design and material type on the fatigue response of metallic meta-biomaterials fabricated with selective laser melting...
January 2018: Acta Biomaterialia
Reza Tabrizi, Kemal Tumer, Shervin Shafiei, Ashkan Rashad
PURPOSE: The stability of distraction osteogenesis (DO) is an important issue in maxillary advancement for patients with cleft lip and palate (CLP). The aim of this study was to evaluate postoperative stability in patients with and without internal fixation after removing maxillary distraction devices. MATERIALS AND METHODS: This randomized clinical trial assessed patients with CLP who needed maxillary advancement greater than 6 mm; they were randomly assigned to 1 of 2 groups...
October 16, 2017: Journal of Oral and Maxillofacial Surgery
Serdar Bozyel, Tolga Aksu, Tumer Erdem Guler, Kazım Serhan Ozcan, Mujdat Aktas
No abstract text is available yet for this article.
August 2017: Journal of Geriatric Cardiology: JGC
Isabelle Cote, Yasemin Sakarya, Sara M Green, Drake Morgan, Christy S Carter, Nihal Tumer, Philip J Scarpace
We evaluated the contribution of brown adipose tissue (BAT) sympathetic innervation on central leptin mediated weight loss. In a short and long-term study, F344BN rats submitted to either a denervation of interscapular BAT (Denervated) or a sham operation (Sham). Animals from each group received Ob (Leptin) or GFP (Control) gene through a single injection of recombinant adeno-associated virus delivered centrally. Changes in body weight were recorded for 14 or 35 days, after which adipose tissues and skeletal muscles were weighed...
October 31, 2017: American Journal of Physiology. Endocrinology and Metabolism
M Demir, M Kemal Tumer, M Çiçek, M Uysal, A Yoldas, A Doganer
BACKGROUND: The effects of aging on the histopathological changes of Temporomandibular joint (TMJ) and the existence and age related alterations of immunochemical expressions of type I collagen and matrix metalloproteinase-2 (MMP-2) proteins was aimed to be displayed. MATERIALS AND METHODS: In this study, 14 Balb/C type white mice (50-80g) were included. Groups were organized as Group I two month old young mice group (n=7) and Group II 18 month old mice group (n=7)...
October 24, 2017: Folia Morphologica (Warsz)
Isabelle Côté, Sara M Green, Hale Z Toklu, Drake Morgan, Christy S Carter, Nihal Tümer, Philip J Scarpace
Brains of females are more sensitive to the acute catabolic actions of leptin. However, sex differences in the long-term physiological responses to central leptin receptor modulation are unknown. To this end, we centrally delivered a viral vector to overexpress leptin (Leptin), a neutral leptin receptor antagonist (Leptin-Antagonist), or a green fluorescence protein (Control). We examined chronic changes in body weight and composition in male and female rats. Females displayed greater and sustained responses to Leptin whereas males rapidly lost physiological effects and developed leptin resistance confirmed by lower acute leptin-mediated phosphorylation of STAT3 (P-STAT3)...
October 17, 2017: Journal of Neuroendocrinology
Lis Hasholt, Martin Ballegaard, Henning Bundgaard, Michael Christiansen, Ian Law, Allan M Lund, Anne Norremolle, Ase Krogh Rasmussen, Kirstine Ravn, Zeynep Tumer, Flemming Wibrand, Ulla Feldt-Rasmussen
Fabry disease is an X- linked inherited lysosomal storage disease caused by mutations in the GLA gene encoding the lysosomal enzyme alpha-galactosidase A (α-Gal A). The possible pathological significance of the D313Y variant in the GLA gene has not been verified and it may be a Fabry variant. Our aim was to elucidate whether the presence of the D313Y variant influenced the α-Gal A activity or resulted in Fabry symptoms or Fabry organ involvement. In two Danish families the presence of the D313Y variant did not result in reduced α-Gal A activity or clinical Fabry manifestations in males, and the presence in Fabry females did not significantly enhance the phenotype of a known causative mutation in the GLA gene (G271S)...
October 16, 2017: Scandinavian Journal of Clinical and Laboratory Investigation
Bitten Schönewolf-Greulich, Anne-Marie Bisgaard, Rikke S Møller, Morten Dunø, Karen Brøndum-Nielsen, Simran Kaur, Nicole J Van Bergen, Sebastian Lunke, Stefanie Eggers, Cathrine Jespersgaard, John Christodoulou, Zeynep Tümer
The differential diagnostics in Rett syndrome has evolved with the development of next generation sequencing based techniques and many patients have been diagnosed with other syndromes or variants in newly described genes where the associated phenotype(s) is yet to be fully explored. The term Rett-like refers to phenotypes with distinct overlapping features of Rett syndrome where the clinical criteria are not completely fulfilled. In this paper we have combined a review of Rett-like disorders with data from a Danish cohort of 35 patients with Rett-like phenotypes emphasizing the diagnostic overlap with Pitt-Hopkins syndrome, Cornelia de Lange syndrome with SMC1A variants, and epileptic encephalopathies for example due to STXBP1 variants...
October 10, 2017: Clinical Genetics
A Z Ozsoy, N Karakus, S Tural, S Yigit, N Kara, G Alayli, M K Tumer, O Kuru
BACKGROUND: MIF, a proinflammatory cytokine, contributes to the pathogenesis of acute, chronic, and autoimmune inflammatory disorders and balances the suppressive effect of glucocorticoids on the immune system. There is an interaction between bone metabolism and the immune system via the production of cytokines. We aimed to analyze the relationship between the MIF gene -173G > C promoter polymorphism and osteoporosis. METHODS: In this case-control study performed in a university hospital, 286 samples (136 women with osteoporosis and 150 healthy age-matched controls) participated...
September 13, 2017: Zeitschrift Für Rheumatologie
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