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https://www.readbyqxmd.com/read/28088759/how-accurate-are-accurate-force-fields-for-b-dna
#1
Pablo D Dans, Ivan Ivani, Adam Hospital, Guillem Portella, Carlos González, Modesto Orozco
Last generation of force-fields are raising expectations on the quality of molecular dynamics (MD) simulations of DNA, as well as to the belief that theoretical models can substitute experimental ones in several cases. However these claims are based on limited benchmarks, where MD simulations have shown the ability to reproduce already existing 'experimental models', which in turn, have an unclear accuracy to represent DNA conformation in solution. In this work we explore the ability of different force-fields to predict the structure of two new B-DNA dodecamers, determined herein by means of (1)H nuclear magnetic resonance (NMR)...
January 13, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28088676/structure-of-o-specific-polysaccharide-of-oligotropha-carboxidovorans-om5-a-wastewater-bacterium
#2
Iwona Komaniecka, Adam Choma, Katarzyna Zamlynska, Anna Sroka-Bartnicka, Pawel Sowinski
Oligotropha carboxidovorans strain OM5 (previously known as Pseudomonas carboxydovorans OM5) is a rod-shaped Gram-negative bacterium isolated from wastewater. This bacterium is able to live in aerobic and, facultatively, in autotrophic conditions. For autotrophic growth, the bacteria can utilize carbon monoxide or hydrogen as a source of energy. The O-specific polysaccharide isolated from O. carboxidovorans OM5 lipopolysaccharide was structurally characterized using chemical analyses, 1D and 2D NMR spectroscopy, and MALDI-TOF mass spectrometry techniques...
January 3, 2017: Carbohydrate Research
https://www.readbyqxmd.com/read/28088662/metabolic-profiles-of-exudates-from-chronic-leg-ulcerations
#3
Adam Junka, Wojciech Wojtowicz, Adam Ząbek, Grzegorz Krasowski, Danuta Smutnicka, Barbara Bakalorz, Agnieszka Boruta, Mariusz Dziadas, Piotr Młynarz, Parish Paymon Sedghizadeh, Marzenna Bartoszewicz
Chronic leg ulceration is a disease usually associated with other comorbidities, and significantly reduces patient quality of life. Infected leg ulcers can lead to limb-threatening sequelae or mortality. Leg ulcerations are colonized by a number of microbes that are able to cause life-threating infections in susceptible patients. Wound exudate is a body fluid that collects metabolites from patient eukaryotic cells and from prokaryotic bacterial communities inhabiting the wound. This study aimed at identification of metabolites in exudates collected from chronic leg ulcers, and correlation of this metabolome with patient comorbidities and microbiological status of the wound...
January 10, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28088655/insurance-based-lie-detection-enhancing-the-verifiability-approach-with-a-model-statement-component
#4
Adam C Harvey, Aldert Vrij, Sharon Leal, Marcus Lafferty, Galit Nahari
PURPOSE: The Verifiability Approach (VA) is verbal lie detection tool that has shown promise when applied to insurance claims settings. This study examined the effectiveness of incorporating a Model Statement comprised of checkable information to the VA protocol for enhancing the verbal differences between liars and truth tellers. METHOD: The study experimentally manipulated supplementing (or withholding) the VA with a Model Statement. It was hypothesised that such a manipulation would (i) encourage truth tellers to provide more verifiable details than liars and (ii) encourage liars to report more unverifiable details than truth tellers (compared to the no model statement control)...
January 12, 2017: Acta Psychologica
https://www.readbyqxmd.com/read/28088481/saxs-structural-studies-of-dps-from-deinococcus-radiodurans-highlights-the-conformation-of-the-mobile-n-terminal-extensions
#5
Sandra P Santos, Maxime G Cuypers, Adam Round, Stephanie Finet, Theyencheri Narayanan, Edward P Mitchell, Célia V Romão
The radiation resistant bacterium Deinococcus radiodurans contains two DNA binding proteins from starved cells (Dps): Dps1 (DR2263) and Dps2 (DRB0092). These are suggested to play a role in DNA interaction, manganese and iron storage. The proteins assemble as a conserved dodecameric structure with structurally uncharacterized N-terminal extensions. In the case of DrDps1 these extensions have been proposed to be involved in DNA interactions, while in DrDps2 their function has yet to be established. The reported data reveals the relative position of the N-terminal extensions to the dodecameric sphere in solution for both Dps...
January 11, 2017: Journal of Molecular Biology
https://www.readbyqxmd.com/read/28088396/pulmonary-alveolar-proteinosis-in-association-with-secondary-hemophagocytic-lymphohistiocytosis
#6
Jenny Lin, Aliva De, Lisa Figueiredo, Rochelle Maxwell, Emily Wasserman, Kelly Adams, Jacqueline Weingarten, Giles Peek, Michael Miksa
Pulmonary alveolar proteinosis (PAP) is a rare diffuse lung disease in the pediatric population. There are currently few cases documenting hemophagocytic lymphohistiocytosis as a cause for secondary PAP. We describe an ex-preterm child with secondary hemophagocytic lymphohistiocytosis, complicated by PAP and hypoxemic respiratory failure.
January 12, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28088365/stem-cells-for-als-an-overview-of-possible-therapeutic-approaches
#7
REVIEW
Joanna Czarzasta, Aleksandra Habich, Tomasz Siwek, Adam Czapliński, Wojciech Maksymowicz, Joanna Wojtkiewicz
Amyotrophic lateral sclerosis (ALS) is an unusual, fatal, neurodegenerative disorder leading to the loss of motor neurons. After diagnosis, the average lifespan ranges from 3 to 5 years, and death usually results from respiratory failure. Although the pathogenesis of ALS remains unclear, multiple factors are thought to contribute to the progression of ALS, such as network interactions between genes, environmental exposure, impaired molecular pathways and many others. The neuroprotective properties of neural stem cells (NSCs) and the paracrine signaling of mesenchymal stem cells (MSCs) have been examined in multiple pre-clinical trials of ALS with promising results...
January 11, 2017: International Journal of Developmental Neuroscience
https://www.readbyqxmd.com/read/28088136/pressure-effects-on-structure-and-dynamics-of-metallic-glass-forming-liquid
#8
Yuan-Chao Hu, Peng-Fei Guan, Qing Wang, Yong Yang, Hai-Yang Bai, Wei-Hua Wang
Although the structure and dynamics of metallic glass-forming liquids have been extensively investigated, studies of the pressure effects are rare. In the present study, the structural and dynamical properties of a ternary metallic liquid are systematically studied via extensive molecular dynamics simulations. Our results clearly show that, like isobaric cooling, isothermal compression could also slow down the dynamics of metallic liquid, leading to glass formation. However, the temperature- and pressure-induced glass transitions differ in the formation of local coordination structures and the variation of fragility...
January 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28088123/antibody-dependent-cellular-cytotoxicity-and-influenza-virus
#9
REVIEW
Hillary A Vanderven, Sinthujan Jegaskanda, Adam K Wheatley, Stephen J Kent
Antibodies are a key defence against influenza infection and disease, but neutralizing antibodies are often strain-specific and of limited utility against divergent or pandemic viruses. There is now considerable evidence that influenza-specific antibodies with Fc-mediated effector functions, such as antibody-dependent cellular cytotoxicity (ADCC), can assist in the clearance of influenza infection in vitro and in animal models. Further, ADCC-mediating antibodies that recognize a broad array of influenza strains are common in humans, likely as a result of being regularly exposed to influenza infections...
January 11, 2017: Current Opinion in Virology
https://www.readbyqxmd.com/read/28087946/invasion-of-host-cells-and-tissues-by-uropathogenic-bacteria
#10
Adam J Lewis, Amanda C Richards, Matthew A Mulvey
Within the mammalian urinary tract uropathogenic bacteria face many challenges, including the shearing flow of urine, numerous antibacterial molecules, the bactericidal effects of phagocytes, and a scarcity of nutrients. These problems may be circumvented in part by the ability of uropathogenic Escherichia coli and several other uropathogens to invade the epithelial cells that line the urinary tract. By entering host cells, uropathogens can gain access to additional nutrients and protection from both host defenses and antibiotic treatments...
December 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28087758/method-for-the-determination-of-carbonyl-compounds-in-e-cigarette-aerosols
#11
Jason W Flora, Celeste T Wilkinson, James W Wilkinson, Peter J Lipowicz, James A Skapars, Adam Anderson, John H Miller
Low levels of thermal degradation products such as carbonyls (formaldehyde, acetaldehyde, acrolein, crotonaldehyde) have been reported in e-cigarette aerosols. The collection and analysis of e-cigarette aerosol carbonyls are often adapted from methods developed for tobacco cigarette smoke. These methodologies are often not sensitive enough to detect low carbonyl levels in e-cigarette aerosols. One objective of this work was to develop and validate a rapid, selective and sensitive ultra-performance liquid chromatography with mass spectrometry method optimized for analysis of carbonyls in e-cigarette aerosols...
February 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28087689/rethinking-revascularization-in-left-ventricular-systolic-dysfunction
#12
EDITORIAL
Adam D DeVore, Eric J Velazquez
No abstract text is available yet for this article.
January 2017: Circulation. Heart Failure
https://www.readbyqxmd.com/read/28087639/vegfd-modulates-both-angiogenesis-and-lymphangiogenesis-during-zebrafish-embryonic-development
#13
Neil I Bower, Adam J Vogrin, Ludovic Le Guen, Huijun Chen, Steven A Stacker, Marc G Achen, Benjamin M Hogan
Vascular endothelial growth factors (VEGFs) control angiogenesis and lymphangiogenesis during development and in pathological conditions. In the zebrafish trunk, Vegfa controls the formation of intersegmental arteries by primary angiogenesis and Vegfc is essential for secondary angiogenesis, the formation of veins and lymphatics. VEGFD has been largely thought of as dispensable for vascular development in vertebrates. Here, we generated a zebrafish vegfd mutant by genome editing. vegfd mutants display significant defects in facial lymphangiogenesis independent of vegfc function...
January 13, 2017: Development
https://www.readbyqxmd.com/read/28087576/circulating-modified-metabolites-and-a-risk-of-esrd-in-patients-with-type-1-diabetes-and-chronic-kidney-disease
#14
Monika A Niewczas, Anna V Mathew, Stephanie Croall, Jaeman Byun, Melissa Major, Venkatta S Sabisetti, Adam Smiles, Joseph V Bonventre, Subramaniam Pennathur, Andrzej S Krolewski
OBJECTIVE: Patients with type 1 diabetes (T1D) with impaired renal function are at increased risk for end-stage renal disease (ESRD). Although the rate of progression varies, determinants and mechanisms of this variation are unknown. RESEARCH DESIGN AND METHODS: We examined serum metabolomic profiles associated with variation in renal function decline in participants with T1D (the Joslin Kidney Study prospective cohort). One hundred fifty-eight patients with proteinuria and chronic kidney disease stage 3 were followed for a median of 11 years to determine estimated glomerular filtration rate slopes from serial measurements of serum creatinine and to ascertain time to onset of ESRD...
January 13, 2017: Diabetes Care
https://www.readbyqxmd.com/read/28087540/international-evidence-based-consensus-diagnostic-criteria-for-hhv-8-negative-idiopathic-multicentric-castleman-disease
#15
David C Fajgenbaum, Thomas S Uldrick, Adam Bagg, Dale Frank, David Wu, Gordan Srkalovic, David Simpson, Amy Y Liu, David Menke, Shanmuganathan Chandrakasan, Mary Jo Lechowicz, Raymond S M Wong, Sheila Pierson, Michele Paessler, Jean-François Rossi, Makoto Ide, Jason Ruth, Michael Croglio, Alexander Suarez, Vera Krymskaya, Amy Chadburn, Gisele Colleoni, Sunita Nasta, Raj Jayanthan, Christopher S Nabel, Corey Casper, Angela Dispenzieri, Alexander Fosså, Dermot Kelleher, Razelle Kurzrock, Peter Voorhees, Ahmet Dogan, Kazuyuki Yoshizaki, Frits van Rhee, Eric Oksenhendler, Elaine S Jaffe, Kojo S J Elenitoba-Johnson, Megan S Lim
Human Herpesvirus-8(HHV-8)-negative, idiopathic multicentric Castleman disease (iMCD) is a rare and life-threatening disorder involving systemic inflammatory symptoms, polyclonal lymphoproliferation, cytopenias, and multiple organ system dysfunction due to a cytokine storm often including interleukin-6. iMCD accounts for one-third to one-half of all cases of MCD and can occur in individuals of any age. Accurate diagnosis is challenging, as no standard diagnostic criteria or diagnostic biomarkers currently exist, and there is significant overlap with malignant, autoimmune, and infectious disorders...
January 13, 2017: Blood
https://www.readbyqxmd.com/read/28087224/5-ht6-receptor-blockade-regulates-primary-cilia-morphology-in-striatal-neurons
#16
Matthew Brodsky, Adam J Lesiak, Alex Croicu, Nathalie Cohenca, Jane M Sullivan, John F Neumaier
The 5-HT6 receptor has been implicated in a variety of cognitive processes including habitual behaviors, learning, and memory. It is found almost exclusively in the brain, is expressed abundantly in striatum, and localizes to neuronal primary cilia. Primary cilia are antenna-like, sensory organelles found on most neurons that receive both chemical and mechanical signals from other cells and the surrounding environment; however, the effect of 5-HT6 receptor function on cellular morphology has not been examined...
January 10, 2017: Brain Research
https://www.readbyqxmd.com/read/28087143/contribution-of-age-to-clinical-trial-enrollment-and-tolerance-with-ovarian-cancer
#17
Jessica Gillen, Camille Gunderson, Molly Greenwade, Michelle Rowland, Rachel Ruskin, Kai Ding, Aleia Crim, Adam Walter, Emily White, Kathleen Moore
INTRODUCTION: Increasing age has been correlated with shorter survival in ovarian cancer patients, a finding attributed to diminished tolerance of standard therapy. Elderly patients, however, are less likely to enroll on clinical trials; thus, limited data exists to evaluate their response to front line treatment. This study describes how elderly patients on trial fared, with respect to toxicity and response, compared to younger women. METHODS: A retrospective cohort study was performed of ovarian cancer patients enrolled in front line chemotherapy trials at our institution between 2000 and 2013...
January 10, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28087069/safety-tolerability-and-antiviral-effect-of-rg-101-in-patients-with-chronic-hepatitis-c-a-phase-1b-double-blind-randomised-controlled-trial
#18
Meike H van der Ree, J Marleen de Vree, Femke Stelma, Sophie Willemse, Marc van der Valk, Svend Rietdijk, Richard Molenkamp, Janke Schinkel, Ad C van Nuenen, Ulrich Beuers, Salah Hadi, Marten Harbers, Eva van der Veer, Kai Liu, John Grundy, Amy K Patick, Adam Pavlicek, Jacqueline Blem, Michael Huang, Paul Grint, Steven Neben, Neil W Gibson, Neeltje A Kootstra, Hendrik W Reesink
BACKGROUND: miR-122 is an important host factor for hepatitis C virus (HCV) replication. The aim of this study was to assess the safety and tolerability, pharmacokinetics, and antiviral effect of a single dose of RG-101, a hepatocyte targeted N-acetylgalactosamine conjugated oligonucleotide that antagonises miR-122, in patients with chronic HCV infection with various genotypes. METHODS: In this randomised, double-blind, placebo-controlled, multicentre, phase 1B study, patients were randomly assigned to RG-101 or placebo (7:1)...
January 10, 2017: Lancet
https://www.readbyqxmd.com/read/28086964/anti-%C3%AE-synuclein-immunotherapy-reduces-%C3%AE-synuclein-propagation-in-the-axon-and-degeneration-in-a-combined-viral-vector-and-transgenic-model-of-synucleinopathy
#19
Brian Spencer, Elvira Valera, Edward Rockenstein, Cassia Overk, Michael Mante, Anthony Adame, Wagner Zago, Peter Seubert, Robin Barbour, Dale Schenk, Dora Games, Robert A Rissman, Eliezer Masliah
Neurodegenerative disorders such as Parkinson's Disease (PD), PD dementia (PDD) and Dementia with Lewy bodies (DLB) are characterized by progressive accumulation of α-synuclein (α-syn) in neurons. Recent studies have proposed that neuron-to-neuron propagation of α-syn plays a role in the pathogenesis of these disorders. We have previously shown that antibodies against the C-terminus of α-syn reduce the intra-neuronal accumulation of α-syn and related deficits in transgenic models of synucleinopathy, probably by abrogating the axonal transport and accumulation of α-syn in in vivo models...
January 13, 2017: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/28086951/sodium-glucose-transporter-2-sglt2-inhibition-with-empagliflozin-improves-cardiac-diastolic-function-in-a-female-rodent-model-of-diabetes
#20
Javad Habibi, Annayya R Aroor, James R Sowers, Guanghong Jia, Melvin R Hayden, Mona Garro, Brady Barron, Eric Mayoux, R Scott Rector, Adam Whaley-Connell, Vincent G DeMarco
Obese and diabetic individuals are at increased risk for impairments in diastolic relaxation and heart failure with preserved ejection fraction. The impairments in diastolic relaxation are especially pronounced in obese and diabetic women and predict future cardiovascular disease (CVD) events in this population. Recent clinical data suggest sodium glucose transporter-2 (SGLT2) inhibition reduces CVD events in diabetic individuals, but the mechanisms of this CVD protection are unknown. To determine whether targeting SGLT2 improves diastolic relaxation, we utilized empagliflozin (EMPA) in female db/db mice...
January 13, 2017: Cardiovascular Diabetology
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