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Tanja K Halczok, Kerstin Fischer, Robert Gierke, Veronika Zeus, Frauke Meier, Christoph Treß, Anne Balkema-Buschmann, Sébastien J Puechmaille, Gerald Kerth
BACKGROUND: As bats have recently been described to harbor many different viruses, several studies have investigated the genetic co-variation between viruses and different bat species. However, little is known about the genetic co-variation of viruses and different populations of the same bat species, although such information is needed for an understanding of virus transmission dynamics within a given host species. We hypothesized that if virus transmission between host populations depends on events linked to gene flow in the bats, genetic co-variation should exist between host populations and astroviruses...
January 5, 2017: BMC Evolutionary Biology
Jan-Philipp Minol, Verena Veulemans, Tobias Zeus, Alexander Blehm
Transcatheter aortic valve implantation (TAVI) is an emerging treatment for high-risk patients with aortic stenosis. Aortic regurgitation is considered to be a relative contraindication for transcatheter procedures, as a non-calcified aortic annulus poses the risk of an insufficient anchoring of the transcatheter aortic valve prosthesis. Herein is described the case of a patient who suffered from recurrent aortic valve regurgitation after valve-sparing repair, and which was successfully treated by the transcatheter implantation of an Edwards SAPIEN 3™ prosthesis...
July 2016: Journal of Heart Valve Disease
L Kleinebrecht, V Veulemans, A Polzin, M Kelm, T Zeus
Atrial fibrillation is a widespread disease and highly relevant as it carries an extended risk for ischaemic stroke. Surgical closure of the left atrial appendage is routinely performed during open heart surgery in patients with atrial fibrillation with the aim of thromboembolic protection. In this report we present a successful percutaneous closure of a left atrial appendage, which showed clinically relevant suture dehiscence several years after surgical closure.
December 19, 2016: Netherlands Heart Journal
Alina Achilles, Annemarie Mohring, Lisa Dannenberg, Maria Grandoch, Thomas Hohlfeld, Jens Fischer, Bodo Levkau, Malte Kelm, Tobias Zeus, Amin Polzin
BACKGROUND: The direct oral anticoagulant (DOAC) dabigatran is a direct thrombin inhibitor. Its landmark trial, the RE-LY study, observed a trend towards a higher incidence of myocardial infarctions (MI) in dabigatran treated patients. Since then, it has been discussed whether dabigatran increases the risk of MI. OBJECTIVE: In this study, we aimed to assess platelet reactivity and platelet thrombin receptor expression in dabigatran-treated patients. METHODS: We conducted a cross-sectional study in 13 hospitalized patients with planned initiation of dabigatran medication...
December 19, 2016: Journal of Thrombosis and Haemostasis: JTH
Christos Rammos, Tobias Zeus, Jan Balzer, Verena Veulemans, Katharina Hellhammer, Svenja Niebel, Malte Kelm, Tienush Rassaf
BACKGROUND: Mitral regurgitation causes left atrial (LA) and left ventricular (LV) dysfunction, dilatation, and remodeling. Following percutaneous mitral valve repair (PMVR) using the MitraClip® approach, reverse cardiac remodeling is desirable. To date, the influence of PMVR on LA and segmental LV function and remodeling has not been investigated in detail. METHODS: Twenty-six patients who received the MitraClip device were enrolled in an open-label, single-center observational study...
May 2016: Journal of Heart Valve Disease
Matheus Simonato Dos Santos, Mohamed Abdel-Wahab, David Hildick-Smith, John Webb, Yaron Arbel, Hafid Amrane, Brian Whisenant, Matthew Miller, Marco Agrifoglio, Stefano Salizzoni, Patrizia Presbitero, Christian Frerker, Vasco Gama Ribeiro, Helene Eltchaninoff, Arend de Weger, Alfredo Cerillo, Ariel Finkelstein, Luca Testa, Tobias Zeus, Claudia Fiorina, Piotr Chodor, Dan Ioanes, Neil Moat, Danny Dvir
No abstract text is available yet for this article.
November 1, 2016: Journal of the American College of Cardiology
S Afzal, V Veulemans, J Balzer, T Rassaf, K Hellhammer, A Polzin, M Kelm, T Zeus
AIMS: Visual guidance through echocardiography and fluoroscopy is crucial for a successful transseptal puncture (TSP) in a prespecified region of the fossa ovalis. The novel EchoNavigator system Release II (EchoNav II, Philips Healthcare, Andover, Massachusetts, USA) enables the real-time fusion of fluoroscopic and echocardiographic images. We evaluated this new imaging method in respect to safety and efficacy of TSP during MitraClip implantation and left atrial appendage closure...
December 13, 2016: Netherlands Heart Journal
Verena Veulemans, Sabine Mollus, Axel Saalbach, Max Pietsch, Katharina Hellhammer, Tobias Zeus, Ralf Westenfeld, Jürgen Weese, Malte Kelm, Jan Balzer
AIM: To investigate the accuracy of a rotational C-arm CT-based 3D heart model to predict an optimal C-arm configuration during transcatheter aortic valve replacement (TAVR). METHODS: Rotational C-arm CT (RCT) under rapid ventricular pacing was performed in 57 consecutive patients with severe aortic stenosis as part of the pre-procedural cardiac catheterization. With prototype software each RCT data set was segmented using a 3D heart model. From that the line of perpendicularity curve was obtained that generates a perpendicular view of the aortic annulus according to the right-cusp rule...
October 26, 2016: World Journal of Cardiology
Víctor M Luna-Pineda, Juan Pablo Reyes-Grajeda, Ariadnna Cruz-Córdova, Zeus Saldaña-Ahuactzi, Sara A Ochoa, Carmen Maldonado-Bernal, Vicenta Cázares-Domínguez, Leticia Moreno-Fierros, José Arellano-Galindo, Rigoberto Hernández-Castro, Juan Xicohtencatl-Cortes
Urinary tract infections (UTIs) are associated with high rates of morbidity and mortality worldwide, and uropathogenic Escherichia coli (UPEC) is the main etiologic agent. Fimbriae assembled on the bacterial surface are essential for adhesion to the urinary tract epithelium. In this study, the FimH, CsgA, and PapG adhesins were fused to generate biomolecules for use as potential target vaccines against UTIs. The fusion protein design was generated using bioinformatics tools, and template fusion gene sequences were synthesized by GenScript in the following order fimH-csgA-papG-fimH-csgA (fcpfc) linked to the nucleotide sequence encoding the [EAAAK]5 peptide...
2016: Frontiers in Cellular and Infection Microbiology
Laura Rué, Mónica Bañez-Coronel, Jordi Creus-Muncunill, Albert Giralt, Rafael Alcalá-Vida, Gartze Mentxaka, Birgit Kagerbauer, M Teresa Zomeño-Abellán, Zeus Aranda, Veronica Venturi, Esther Pérez-Navarro, Xavier Estivill, Eulàlia Martí
Huntington's disease (HD) is a polyglutamine disorder caused by a CAG expansion in the Huntingtin (HTT) gene exon 1. This expansion encodes a mutant protein whose abnormal function is traditionally associated with HD pathogenesis; however, recent evidence has also linked HD pathogenesis to RNA stable hairpins formed by the mutant HTT expansion. Here, we have shown that a locked nucleic acid-modified antisense oligonucleotide complementary to the CAG repeat (LNA-CTG) preferentially binds to mutant HTT without affecting HTT mRNA or protein levels...
November 1, 2016: Journal of Clinical Investigation
Zeus A De Los Santos, Christian Wolf
The self-assembly of a stereodynamic phosphine ligand, Pd(II) and a chiral amine, amino alcohol or amino acid gen-erates characteristic UV and CD signals that can be used for quantitative stereochemical analysis of the bound substrate. A robust mix-and-measure chiroptical sensing protocol has been developed and used for the determination of the abso-lute configuration, ee and yield of an amine produced by iridium catalyzed asymmetric hydrogenation of an iminium salt. The analysis requires only 1 mg of the crude reaction mixture and minimizes cost, labor, time and waste...
October 3, 2016: Journal of the American Chemical Society
Zeus Saldaña-Ahuactzi, Gerardo E Rodea, Ariadnna Cruz-Córdova, Viridiana Rodríguez-Ramírez, Karina Espinosa-Mazariego, Martín A González-Montalvo, Sara A Ochoa, Bertha González-Pedrajo, Carlos A Eslava-Campos, Edgar O López-Villegas, Rigoberto Hernández-Castro, José Arellano-Galindo, Genaro Patiño-López, Juan Xicohtencatl-Cortes
Enterotoxigenic Escherichia coli (ETEC) is a major cause of morbidity in children under 5 years of age in low- and middle-income countries and a leading cause of traveler's diarrhea worldwide. The ability of ETEC to colonize the intestinal epithelium is mediated by fimbrial adhesins, such as CS21 (Longus). This adhesin is a type IVb pilus involved in adherence to intestinal cells in vitro and bacterial self-aggregation. Fourteen open reading frames have been proposed to be involved in CS21 assembly, hitherto only the lngA and lngB genes, coding for the major (LngA) and minor (LngB) structural subunit, have been characterized...
2016: Frontiers in Microbiology
Lisa Dannenberg, Vladimir Erschoff, Florian Bönner, Michael Gliem, Sebastian Jander, Bodo Levkau, Malte Kelm, Thomas Hohlfeld, Tobias Zeus, Amin Polzin
BACKGROUND: >50% of stroke patients rely on analgesic medication to control pain. Aspirin is the mainstay of medical treatment of stroke patients; however analgesic medication with dipyrone impairs aspirin antiplatelet effects ex-vivo. The clinical impact of this impairment is unknown. Therefore, we aimed to determine aspirin antiplatelet effects and neurological outcome in stroke patients with aspirin and dipyrone comedication. METHODS: We conducted a prospective cohort study in 41 patients with stroke...
December 2016: Vascular Pharmacology
Lisa Dannenberg, Amin Polzin, Roland Bullens, Malte Kelm, Tobias Zeus
No abstract text is available yet for this article.
July 15, 2016: International Journal of Cardiology
Verena Veulemans, Tobias Zeus, Laura Kleinebrecht, Jan Balzer, Katharina Hellhammer, Amin Polzin, Patrick Horn, Alexander Blehm, Jan-Philipp Minol, Patric Kröpil, Ralf Westenfeld, Tienush Rassaf, Artur Lichtenberg, Malte Kelm
BACKGROUND: Preprocedural manual multi-slice-CT-segmentation tools (MSCT-ST) define the gold standard for planning transcatheter aortic valve replacement (TAVR). They are able to predict the perpendicular line of the aortic annulus (PPL) and to indicate the corresponding C-arm angulation (CAA). Fully automated planning-tools and their clinical relevance have not been systematically evaluated in a real world setting so far. METHODS AND RESULTS: The study population consists of an all-comers cohort of 160 consecutive TAVR patients with a drop out of 35 patients for technical and anatomical reasons...
2016: PloS One
Patrick Horn, Gülsüm Erkilet, Verena Veulemans, Patric Kröpil, Leon Schurgers, Tobias Zeus, Christian Heiss, Malte Kelm, Ralf Westenfeld
BACKGROUND: Circulating microparticles (MPs) derived from endothelial cells and blood cells bear procoagulant activity and promote thrombin generation. Thrombin exerts proinflammatory effects mediating the progression of atherosclerosis. Aortic valve stenosis may represent an atherosclerosis-like process involving both the aortic valve and the vascular system. The aim of this study was to investigate whether MP-induced thrombin generation is related to coronary atherosclerosis and aortic valve calcification...
2016: PloS One
Christos Rammos, Tobias Zeus, Jan Balzer, Laura Kubatz, Ulrike B Hendgen-Cotta, Verena Veulemans, Katharina Hellhammer, Matthias Totzeck, Peter Luedike, Malte Kelm, Tienush Rassaf
BACKGROUND AND OBJECTIVE: Endothelial dysfunction is predictive for cardiovascular events and may be caused by decreased bioavailability of nitric oxide (NO). NO is scavenged by cell-free hemoglobin with reduction of bioavailable NO up to 70% subsequently deteriorating vascular function. While patients with mitral regurgitation (MR) suffer from an impaired prognosis, mechanisms relating to coexistent vascular dysfunctions have not been described yet. Therapy of MR using a percutaneous mitral valve repair (PMVR) approach has been shown to lead to significant clinical benefits...
2016: PloS One
Katharina Hellhammer, Tobias Zeus, Pablo E Verde, Verena Veulemanns, Lisa Kahlstadt, Georg Wolff, Ralf Erkens, Ralf Westenfeld, Eliano P Navarese, Marc W Merx, Tienush Rassaf, Malte Kelm
AIM: To determine the impact of red blood cell distribution width on outcome in anemic patients undergoing transcatheter aortic valve implantation (TAVI). METHODS: In a retrospective single center cohort study we determined the impact of baseline red cell distribution width (RDW) and anemia on outcome in 376 patients with aortic stenosis undergoing TAVI. All patients were discussed in the institutional heart team and declined for surgical aortic valve replacement due to high operative risk...
February 26, 2016: World Journal of Cardiology
Małgorzata Kasprowicz-Potocka, Anita Zaworska, Sebastian Andrzej Kaczmarek, Andrzej Rutkowski
The aim of this study was to determine the nutrient digestibility of seeds of four varieties of narrow-leafed lupines (Lupinus angustifolius) and the possibility of soya bean meal (SBM) substitution by lupine seeds alone and in combination with rapeseed meal (RSM) in the diets of pigs. The seeds of the lupine varieties Kalif, Sonet, Zeus and Boruta were analysed. The apparent total tract digestibility (ATTD) was determined on 50 cross-bred pigs using the difference method with titanium dioxide as a marker. The substitution of SBM by lupine seeds alone (at 0 - 100%) was tested on 60 pigs (20-105 kg body weight (BW)) and by a combination of lupine seeds and RSM on 180 fattening pigs (35-80 kg BW)...
2016: Archives of Animal Nutrition
Sara Ariotti, Marianna Adamo, Francesco Costa, Athanasios Patialiakas, Carlo Briguori, Attila Thury, Salvatore Colangelo, Gianluca Campo, Matteo Tebaldi, Imre Ungi, Stefano Tondi, Marco Roffi, Alberto Menozzi, Nicoletta de Cesare, Roberto Garbo, Emanuele Meliga, Luca Testa, Henrique Mesquita Gabriel, Marco Ferlini, Pascal Vranckx, Marco Valgimigli
OBJECTIVES: This study sought to investigate the ischemic and bleeding outcomes of patients fulfilling high bleeding risk (HBR) criteria who were randomized to zotarolimus-eluting Endeavor Sprint stent (E-ZES) or bare-metal stent (BMS) implantation followed by an abbreviated dual antiplatelet therapy (DAPT) duration for stable or unstable coronary artery disease. BACKGROUND: DES instead of BMS use remains controversial in HBR patients, in whom long-term DAPT poses safety concerns...
March 14, 2016: JACC. Cardiovascular Interventions
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