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Eugenia Kress, Julika Merres, Lea-Jessica Albrecht, Sven Hammerschmidt, Thomas Pufe, Simone C Tauber, Lars-Ove Brandenburg
BACKGROUND: Antimicrobial peptides are important components of the host defence with a broad range of functions including direct antimicrobial activity and modulation of inflammation. Lack of cathelin-related antimicrobial peptide (CRAMP) was associated with higher mortality and bacterial burden and impaired neutrophil granulocyte infiltration in a model of pneumococcal meningitis. The present study was designed to characterize the effects of CRAMP deficiency on glial response and phagocytosis after exposure to bacterial stimuli...
September 16, 2017: Cell Communication and Signaling: CCS
Stefano de Pretis, Theresia R Kress, Marco J Morelli, Arianna Sabò, Chiara Locarno, Alessandro Verrecchia, Mirko Doni, Stefano Campaner, Bruno Amati, Mattia Pelizzola
Overexpression of the MYC transcription factor causes its widespread interaction with regulatory elements in the genome but leads to the up- and down-regulation of discrete sets of genes. The molecular determinants of these selective transcriptional responses remain elusive. Here, we present an integrated time-course analysis of transcription and mRNA dynamics following MYC activation in proliferating mouse fibroblasts, based on chromatin immunoprecipitation, metabolic labeling of newly synthesized RNA, extensive sequencing, and mathematical modeling...
September 13, 2017: Genome Research
Emanuele Maggio, Georg Kresse
Hedin's scheme is solved with the inclusion of the vertex function (GWΓ) for a set of small molecules. The computational scheme allows for the consistent inclusion of the vertex both at the polarizability level and in the self-energy. A diagrammatic analysis shows that the self-energy formed with this four-point vertex does not lead to double counting of diagrams, that can be classied as direct "bubbles" and exchange diagrams. By removing the exchange diagrams from the self-energy, a simpler approximation is obtained, called GWtc-tc...
September 5, 2017: Journal of Chemical Theory and Computation
Margaret Maglione, Srikanth Kadiyala, Amii Kress, Jaime L Hastings, Claire E O'Hanlon
This study compared the Applied Behavior Analysis (ABA) benefit provided by TRICARE as an early intervention for autism spectrum disorder with similar benefits in Medicaid and commercial health insurance plans. The sponsor, the Office of the Under Secretary of Defense for Personnel and Readiness, was particularly interested in how a proposed TRICARE reimbursement rate decrease from $125 per hour to $68 per hour for ABA services performed by a Board Certified Behavior Analyst compared with reimbursement rates (defined as third-party payment to the service provider) in Medicaid and commercial health insurance plans...
January 2017: Rand Health Quarterly
Bernhard Josef Rüther, Miriam Scheld, Daniela Dreymueller, Tim Clarner, Eugenia Kress, Lars-Ove Brandenburg, Tine Swartenbroekx, Chloé Hoornaert, Peter Ponsaerts, Petra Fallier-Becker, Cordian Beyer, Sven Olaf Rohr, Christoph Schmitz, Uta Chrzanowski, Tanja Hochstrasser, Stella Nyamoya, Markus Kipp
Brain-intrinsic degenerative cascades are a proposed factor driving inflammatory lesion formation in multiple sclerosis (MS) patients. We recently described a model combining noninflammatory cytodegeneration (via cuprizone) with the classic active experimental autoimmune encephalomyelitis (Cup/EAE model), which exhibits inflammatory forebrain lesions. Here, we describe the histopathological characteristics and progression of these Cup/EAE lesions. We show that inflammatory lesions develop at various topographical sites in the forebrain, including white matter tracts and cortical and subcortical grey matter areas...
August 24, 2017: Glia
Sharada Govinda, Bhushan P Kore, Menno Bokdam, Pratibha Mahale, Abhinav Kumar, Somnath Pal, Biswajit Bhattacharyya, Jonathan Lahnsteiner, Georg Kresse, Cesare Franchini, Anshu Pandey, D D Sarma
Dielectric constants of MAPbX3 (X = Br, I) in the 1 kHz-1 MHz range show strong temperature dependence near room temperature, in contrast to the nearly temperature-independent dielectric constant of CsPbBr3. This strong temperature dependence for MAPbX3 in the tetragonal phase is attributed to the MA(+) dipoles rotating freely within the probing time scale. This interpretation is supported by ab initio molecular dynamics simulations on MAPbI3 that establish these dipoles as randomly oriented with a rotational relaxation time scale of ∼7 ps at 300 K...
September 7, 2017: Journal of Physical Chemistry Letters
Erika Nascimento, Lucia Helena Vitali, Marcia Regina von Zeska Kress, Roberto Martinez
One of the factors causing treatment failure in cryptococcosis is the resistance of Cryptococcus spp. to antifungal drugs, which has motivated the susceptibility assessment of isolates from patients with cryptococcosis, different clinical conditions and infections outcomes. Clinical isolates of Cryptococcus spp. from three different groups of patients were studied in the present investigation: 19 HIV-positive patients with relapsing and/or refractory meningitis (Group 1), 30 HIV-positive patients who experienced a single and limited episode of cryptococcosis (Group 2), and 19 HIV-negative patients with cryptococcosis (Group 3)...
2017: Revista do Instituto de Medicina Tropical de São Paulo
Laura Kress, Tatjana Aue
Both optimism bias and reward-related attention bias have crucial implications for well-being and mental health. Yet, the extent to which the two biases interact remains unclear because, to date, they have mostly been discussed in isolation. Examining interactions between the two biases can lead to new directions in neurocognitive research by revealing their underlying cognitive and neurophysiological mechanisms. In the present article, we suggest that optimism bias and reward-related attention bias mutually enforce each other and recruit a common underlying neural network...
August 2, 2017: Neuroscience and Biobehavioral Reviews
Barbara Namer, Kirstin Ørstavik, Roland Schmidt, Norbert Mair, Inge Petter Kleggetveit, Maximillian Zeidler, Theresa Martha, Ellen Jorum, Martin Schmelz, Theodora Kalpachidou, Michaela Kress, Michiel Langeslag
The first symptom arising in many Fabry patients is neuropathic pain due to changes in small myelinated and unmyelinated fibers in the periphery, which is subsequently followed by a loss of sensory perception. Here we studied changes in the peripheral nervous system of Fabry patients and a Fabry mouse model induced by deletion of α-galactosidase A (Gla(-/0)). The skin innervation of Gla(-/0) mice resembles that of the human Fabry patients. In Fabry diseased humans and Gla(-/0) mice, we observed similar sensory abnormalities, which were also observed in nerve fiber recordings in both patients and mice...
2017: Frontiers in Neurology
Yasmine S Al-Hamdani, Mariana Rossi, Dario Alfè, Theodoros Tsatsoulis, Benjamin Ramberger, Jan Gerit Brandenburg, Andrea Zen, Georg Kresse, Andreas Grüneis, Alexandre Tkatchenko, Angelos Michaelides
Molecular adsorption on surfaces plays an important part in catalysis, corrosion, desalination, and various other processes that are relevant to industry and in nature. As a complement to experiments, accurate adsorption energies can be obtained using various sophisticated electronic structure methods that can now be applied to periodic systems. The adsorption energy of water on boron nitride substrates, going from zero to 2-dimensional periodicity, is particularly interesting as it calls for an accurate treatment of polarizable electrostatics and dispersion interactions, as well as posing a practical challenge to experiments and electronic structure methods...
July 28, 2017: Journal of Chemical Physics
Ilana Feain, Chun-Chien Shieh, Paul White, Ricky O'Brien, Sandra Fisher, William Counter, Peter Lazarakis, David Stewart, Simon Downes, Michael Jackson, Siddhartha Baxi, Brendan Whelan, Kuldeep Makhija, Chen-Yu Huang, Michael Barton, Paul Keall
PURPOSE: The purpose of this article is to present the first imaging experiments to demonstrate the functional equivalence between a conventional rotational gantry and a fixed-beam imaging geometry, and the feasibility of an iterative image-reconstruction technique under gravitational deformation. METHODS AND MATERIALS: Experiments were performed using an Elekta Axesse with Agility MLC and XVI, a custom-built rotating phantom stage, a Catphan QA phantom, and a porcine heart...
October 2016: Advances in Radiation Oncology
F Libisch, M Marsman, J Burgdörfer, G Kresse
We extend projection-based embedding techniques to bulk systems to treat point defects in semiconductors and insulators. To avoid non-additive kinetic energy contributions, we construct the density partition using orthogonal subsets of orbitals. We have implemented our approach in the popular Vienna ab initio simulation package software package. We demonstrate its power for defect structures in silicon and polaron formation in titania, two challenging cases for conventional Kohn-Sham density functional theory...
July 21, 2017: Journal of Chemical Physics
Alexander J White, Lee A Collins, Joel D Kress, Christopher Ticknor, Jean Clérouin, Philippe Arnault, Nicolas Desbiens
Transport properties of mixtures of elements in the dense plasma regime play an important role in natural astrophysical and experimental systems, e.g., inertial confinement fusion. We present a series of orbital-free molecular dynamics simulations on dense plasma mixtures with comparison to a global pseudo ion in jellium model. Hydrogen is mixed with elements of increasingly high atomic number (lithium, carbon, aluminum, copper, and silver) at a fixed temperature of 100 eV and constant pressure set by pure hydrogen at 2g/cm^{3}, namely, 370 Mbars...
June 2017: Physical Review. E
Christoph Kuhn, Marie-Louise Lehmann, Alexander Kress, Michael C Truss, Matthias Hermes, Meinolf Blaszkewicz, Jan G Hengstler, Klaus Golka
The gold standard of saving fresh tissue in liquid nitrogen has some serious disadvantages in that this process is not available in daily medical routine practices even in many tumor centers. Our approach of a new minimally invasive technique is obtaining urothelial cells via micro-brushing the urinary bladder on the occasion of urological routine methods such as transurethral resection (TUR). Urothelial cells were obtained from 25 patients via two different micro-brushes from tumor tissue and from macroscopically healthy tissue during TUR...
2017: Journal of Toxicology and Environmental Health. Part A
Deborah Beebe, Jen Jen Chang, Kathleen Kress, Mildred Mattfeldt-Beman
AIMS: To determine whether night shift workers have a poorer diet quality and sleep quality when compared with day shift nurses. BACKGROUND: There is a dearth of research investigating the association between diet quality and sleep quality of day and night shift nurses. METHODS: Data on nurses (n = 103) working either a day or night shift from two Midwestern hospitals were obtained from August 2015 to February 2016. The instruments used were the Diet History Questionnaire and the Pittsburg Sleep Quality Index...
July 11, 2017: Journal of Nursing Management
Justin W Timbie, Claude M Setodji, Amii Kress, Tara A Lavelle, Mark W Friedberg, Peter J Mendel, Emily K Chen, Beverly A Weidmer, Christine Buttorff, Rosalie Malsberger, Mallika Kommareddi, Afshin Rastegar, Aaron Kofner, Lisa Hiatt, Ammarah Mahmud, Katherine Giuriceo, Katherine L Kahn
Background From 2011 through 2014, the Federally Qualified Health Center Advanced Primary Care Practice Demonstration provided care management fees and technical assistance to a nationwide sample of 503 federally qualified health centers to help them achieve the highest (level 3) medical-home recognition by the National Committee for Quality Assurance, a designation that requires the implementation of processes to improve access, continuity, and coordination. Methods We examined the achievement of medical-home recognition and used Medicare claims and beneficiary surveys to measure utilization of services, quality of care, patients' experiences, and Medicare expenditures in demonstration sites versus comparison sites...
July 20, 2017: New England Journal of Medicine
Alexis Allot, Kirsley Chennen, Yannis Nevers, Laetitia Poidevin, Arnaud Kress, Raymond Ripp, Julie Dawn Thompson, Olivier Poch, Odile Lecompte
BACKGROUND: The constant and massive increase of biological data offers unprecedented opportunities to decipher the function and evolution of genes and their roles in human diseases. However, the multiplicity of sources and flow of data mean that efficient access to useful information and knowledge production has become a major challenge. This challenge can be addressed by taking inspiration from Web 2.0 and particularly social networks, which are at the forefront of big data exploration and human-data interaction...
June 16, 2017: Journal of Medical Internet Research
Gia-Wei Chern, Kipton Barros, Cristian D Batista, Joel D Kress, Gabriel Kotliar
We present a formulation of quantum molecular dynamics that includes electron correlation effects via the Gutzwiller method. Our new scheme enables the study of the dynamical behavior of atoms and molecules with strong electron interactions. The Gutzwiller approach goes beyond the conventional mean-field treatment of the intra-atomic electron repulsion and captures crucial correlation effects such as band narrowing and electron localization. We use Gutzwiller quantum molecular dynamics to investigate the Mott transition in the liquid phase of a single-band metal and uncover intriguing structural and transport properties of the atoms...
June 2, 2017: Physical Review Letters
C Zahn, S Keller, M Toro-Nahuelpan, P Dorscht, W Gross, M Laumann, S Gekle, W Zimmermann, D Schüler, H Kress
Magnetospirillum gryphiswaldense is a helix-shaped magnetotactic bacterium that synthesizes iron-oxide nanocrystals, which allow navigation along the geomagnetic field. The bacterium has already been thoroughly investigated at the molecular and cellular levels. However, the fundamental physical property enabling it to perform magnetotaxis, its magnetic moment, remains to be elucidated at the single cell level. We present a method based on magnetic tweezers; in combination with Stokesian dynamics and Boundary Integral Method calculations, this method allows the simultaneous measurement of the magnetic moments of multiple single bacteria...
June 15, 2017: Scientific Reports
Luitgard M Graul-Neumann, Eva Klopocki, Nicolai Adolphs, Martin A Mensah, Wolfram Kress
Crouzon syndrome craniofacial dysostosis type I [OMIM 123500] is caused by mutations in the gene encoding fibroblast growth factor receptor-2 (FGFR2). An overlapping phenotype with Muenke and Crouzon syndrome with acanthosis nigricans (FGFR3 mutations) is known. The clinical diagnosis can be corroborated by molecular studies in about 80-90% of the cases. No clear genotype/phenotype correlation has been identified yet. Here, we describe a second family with a mild phenotype in which the FGFR2 mutation c.943G>T leading to the amino acid substitution p...
March 2017: Molecular Syndromology
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