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https://www.readbyqxmd.com/read/28549727/topographic-analysis-by-atomic-force-microscopy-of-proteoliposomes-matrix-vesicle-mimetics-harboring-tnap-and-anxa5
#1
Maytê Bolean, Ivana A Borin, Ana M S Simão, Massimo Bottini, Luis A Bagatolli, Marc F Hoylaerts, José L Millán, Pietro Ciancaglini
Atomic force microscopy (AFM) is one of the most commonly used scanning probe microscopy techniques for nanoscale imaging and characterization of lipid-based particles. However, obtaining images of such particles using AFM is still a challenge. The present study extends the capabilities of AFM to the characterization of proteoliposomes, a special class of liposomes composed of lipids and proteins, mimicking matrix vesicles (MVs) involved in the biomineralization process. To this end, proteoliposomes were synthesized, composed of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) and 1,2-dipalmitoyl-sn-glycero-3-phospho-L-serine (DPPS), with inserted tissue-nonspecific alkaline phosphatase (TNAP) and/or annexin V (AnxA5), both characteristic proteins of osteoblast-derived MVs...
May 23, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28548613/recommendations-for-research-on-suicide-loss-a-commentary
#2
Robert A Neimeyer, Julie Cerel, Myfanwy Maple
As detailed in the lead article in this Special Issue, the Survivors of Suicide Loss Task Force of the National Action Alliance for Suicide Prevention in the United States has recently worked to formulate national guidelines to mitigate the harmful after-effects of suicide in social and family systems. In the present article, we elaborate on one of four strategic directions addressed by the Task Force, namely the development of goals and objectives for surveillance, research and evaluation of the impact of suicide loss...
May 26, 2017: Death Studies
https://www.readbyqxmd.com/read/28547867/pull-out-strength-of-dual-outer-diameter-pedicle-screws-compared-to-uncemented-and-cemented-standard-pedicle-screws-a-biomechanical-in-vitro-study
#3
Andrea Lorenz, Carmen I Leichtle, Sandra Frantz, Marte Bumann, Ilias Tsiflikas, Thomas Shiozawa, Ulf G Leichtle
OBJECTIVE: To analyze the potential of the dual outer diameter screw and systematically evaluate the pull-out force of the dual outer diameter screw compared to the uncemented and cemented standard pedicle screws with special regard to the pedicle diameter and the vertebra level. METHODS: Sixty vertebrae of five human spines (T 6 -L 5 ) were sorted into three study groups for pairwise comparison of the uncemented dual outer diameter screw, the uncemented standard screw, and the cemented standard screw, and randomized with respect to bone mineral density (BMD) and vertebra level...
May 26, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28545424/suicide-attempts-in-u-s-army-combat-arms-special-forces-and-combat-medics
#4
Robert J Ursano, Ronald C Kessler, James A Naifeh, Holly Herberman Mash, Carol S Fullerton, Tsz Hin Hinz Ng, Pablo A Aliaga, Gary H Wynn, Hieu M Dinh, James E McCarroll, Nancy A Sampson, Tzu-Cheg Kao, Michael Schoenbaum, Steven G Heeringa, Murray B Stein
BACKGROUND: The U.S. Army suicide attempt rate increased sharply during the wars in Iraq and Afghanistan. Risk may vary according to occupation, which significantly influences the stressors that soldiers experience. METHODS: Using administrative data from the Army Study to Assess Risk and Resilience in Servicemembers (Army STARRS), we identified person-month records for all active duty Regular Army enlisted soldiers who had a medically documented suicide attempt from 2004 through 2009 (n = 9650) and an equal-probability sample of control person-months (n = 153,528)...
May 25, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28535150/a-new-scenario-for-gravity-detection-in-plants-the-position-sensor-hypothesis
#5
O Pouliquen, Y Forterre, A Bérut, H Chauvet, F Bizet, V Legué, B Moulia
The detection of gravity plays a fundamental role during the growth and evolution of plants. Although progress has been made in our understanding of the molecular, cellular and physical mechanisms involved in the gravity detection, a coherent scenario consistent with all the observations is still lacking. In this special issue article, we discuss recent experiments showing that the response to inclination of shoots is independent of the gravity intensity, meaning that the gravity sensor detects an inclination and not a force...
May 23, 2017: Physical Biology
https://www.readbyqxmd.com/read/28521373/paediatric-medicines-regulatory-and-scientific-issues
#6
Chrysa Daousani, Vangelis D Karalis
In the past, dosage regimens authorized for adults were extrapolated to children relying mainly on empirical dosage adjustments. However, children are not small adults, but a distinct and heterogeneous group in terms of physiology, disease occurrence, pharmacokinetics, pharmacodynamics and also psychological, cognitive, and behavioral aspects. Even though it would be helpful to know the physiological changes and the special drug treatment needs in children, this task could not be performed due to ethical reasons...
May 18, 2017: Drug Research
https://www.readbyqxmd.com/read/28518083/bronchoalveolar-lavage-of-murine-lungs-to-analyze-inflammatory-cell-infiltration
#7
Lien Van Hoecke, Emma Richelle Job, Xavier Saelens, Kenny Roose
Bronchoalveolar Lavage (BAL) is an experimental procedure that is used to examine the cellular and acellular content of the lung lumen ex vivo to gain insight into an ongoing disease state. Here, a simple and efficient method is described to perform BAL on murine lungs without the need of special tools or equipment. BAL fluid is isolated by inserting a catheter in the trachea of terminally anesthetized mice, through which a saline solution is instilled into the bronchioles. The instilled fluid is gently retracted to maximize BAL fluid retrieval and to minimize shearing forces...
May 4, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28516320/how-does-the-presence-of-a-conspecific-individual-change-the-behavioral-game-that-a-predator-plays-with-its-prey
#8
Reut Vardi, Zvika Abramsky, Burt P Kotler, Ofir Altstein, Michael L Rosenzweig
Behavioral games predators play among themselves may have profound effects on behavioral games predators play with their prey. We studied the behavioral game between predators and prey within the framework of social foraging among predators. We tested how conspecific interactions among predators (little egret) change the predator-prey behavioral game and foraging success. To do so, we examined foraging behavior of egrets alone and in pairs (male and female) in a specially designed aviary consisting of three equally spaced pools with identical initial prey (comet goldfish) densities...
May 17, 2017: Oecologia
https://www.readbyqxmd.com/read/28510097/ago-austria-recommendation-on-screening-and-diagnosis-of-lynch-syndrome-ls
#9
Alain G Zeimet, Harald Mori, Edgar Petru, Stephan Polterauer, Alexander Reinthaller, Christian Schauer, Tonja Scholl-Firon, Christian Singer, Katharina Wimmer, Johannes Zschocke, Christian Marth
PURPOSE: This manuscript reports the consensus recommendations on screening and diagnosis of Lynch syndrome (LS) in patients with endometrial or ovarian cancer as well as on possible preventive measures in effectively LS-diagnosed women. The recommendations are issued by the Austrian Arbeitsgemeinschaft für Gynäkologische Onkologie (AGO) of the Österreichischen Gesellschaft für Gynäkologie und Geburtshilfe (OEGGG) after consultation of the most recent and relevant literature and following deliberation by the Genetic Task-Force convoked May, 2015 by the AGO Council...
May 16, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28505761/dispersive-transport-and-symmetry-of-the-dispersion-tensor-in-porous-media
#10
Steven R Pride, Donald W Vasco, Eirik G Flekkoy, Ran Holtzman
The macroscopic laws controlling the advection and diffusion of solute at the scale of the porous continuum are derived in a general manner that does not place limitations on the geometry and time evolution of the pore space. Special focus is given to the definition and symmetry of the dispersion tensor that is controlling how a solute plume spreads out. We show that the dispersion tensor is not symmetric and that the asymmetry derives from the advective derivative in the pore-scale advection-diffusion equation...
April 2017: Physical Review. E
https://www.readbyqxmd.com/read/28503309/are-there-two-forms-of-isometric-muscle-action-results-of-the-experimental-study-support-a-distinction-between-a-holding-and-a-pushing-isometric-muscle-function
#11
Laura V Schaefer, Frank N Bittmann
BACKGROUND: In isometric muscle function, there are subjectively two different modes of performance: one can either hold isometrically - thus resist an impacting force - or push isometrically - therefore work against a stable resistance. The purpose of this study is to investigate whether or not two different isometric muscle actions - the holding vs. pushing one (HIMA vs PIMA) - can be distinguished by objective parameters. METHODS: Ten subjects performed two different measuring modes at 80% of MVC realized by a special pneumatic system...
2017: BMC Sports Science, Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28502789/supported-lipid-bilayer-platforms-to-probe-cell-mechanobiology
#12
REVIEW
Roxanne Glazier, Khalid Salaita
Mammalian and bacterial cells sense and exert mechanical forces through the process of mechanotransduction, which interconverts biochemical and physical signals. This is especially important in contact-dependent signaling, where ligand-receptor binding occurs at cell-cell or cell-ECM junctions. By virtue of occurring within these specialized junctions, receptors engaged in contact-dependent signaling undergo oligomerization and coupling with the cytoskeleton as part of their signaling mechanisms. While our ability to measure and map biochemical signaling within cell junctions has advanced over the past decades, physical cues remain difficult to map in space and time...
May 11, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28501953/evaluating-the-contributions-of-muscle-activity-and-joint-kinematics-to-weight-perception-across-multiple-joints
#13
Morgan L Waddell, Eric L Amazeen
Perceived heaviness is clearly a function of muscle activity: objects feel heavy, in part because they are lifted with more force than lighter feeling objects. Recent research showed that participants scale their perceptions to the ratio of muscle activity to lift acceleration during elbow lifts (Waddell et al. J Exp Psychol Hum Percept Perform 42:363-374, 2016). The current study sought psychophysiological functions relating perceived heaviness to EMG and peak lift acceleration across multiple lifts employing different muscles as prime movers...
May 13, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28500503/expression-and-localization-of-myosin-vi-in-developing-mouse-spermatids
#14
Przemysław Zakrzewski, Robert Lenartowski, Maria Jolanta Rędowicz, Kathryn G Miller, Marta Lenartowska
Myosin VI (MVI) is a versatile actin-based motor protein that has been implicated in a variety of different cellular processes, including endo- and exocytic vesicle trafficking, Golgi morphology, and actin structure stabilization. A role for MVI in crucial actin-based processes involved in sperm maturation was demonstrated in Drosophila. Because of the prominence and importance of actin structures in mammalian spermiogenesis, we investigated whether MVI was associated with actin-mediated maturation events in mammals...
May 12, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28495051/bone-histological-correlates-of-soaring-and-high-frequency-flapping-flight-in-the-furculae-of-birds
#15
Jessica Mitchell, Lucas J Legendre, Christine Lefèvre, Jorge Cubo
The furcula is a specialized bone in birds involved in flight function. Its morphology has been shown to reflect different flight styles from soaring/gliding birds, subaqueous flight to high-frequency flapping flyers. The strain experienced by furculae can vary depending on flight type. Bone remodeling is a response to damage incurred from different strain magnitudes and types. In this study, we tested whether a bone microstructural feature, namely Haversian bone density, differs in birds with different flight styles, and reassessed previous work using phylogenetic comparative methods that assume an evolutionary model with additional taxa...
March 20, 2017: Zoology: Analysis of Complex Systems, ZACS
https://www.readbyqxmd.com/read/28492296/italian-consensus-in-neuroradiological-anaesthesia-icona-managing-anaesthesia-during-endovascular-procedures
#16
Carlo A Castioni, Andrea Amadori, Federico Bilotta, Moreno Bolzon, Edoardo Barboni, Anselmo Caricato, Guido Dall'acqua, Francesco DI Paola, Andrea Forastieri Molinari, Paolo Gritti, Italia LA Rosa, Marcello Longo, Carla Maglione, Pietro Martorano, Marina Munari, Valerio Perotti, Frank Rasulo, Maria Ruggiero, Antonio Santoro, Luigia Scudeller, Miriam Tumolo, Anna T Mazzeo
Anaesthetic management of patients undergoing endovascular procedures for treating intracranial aneurysms or cerebrovascular malformations must consider a number of specific challenges, in addition to those associated with anaesthesia for other specialties. In addition to maintenance of physiological stability, manipulation of systemic and cerebral haemodynamic parameters may be required to treat any sudden unexpected catastrophic neurological events. A multidisciplinary group including neuro- and pediatric anaesthesiologists, interventional neuroradiologists, neurosurgeons, and a clinical methodologist contributed to this document...
May 11, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/28490584/a-naturally-occurring-recombinant-enterovirus-expresses-a-torovirus-deubiquitinase
#17
Pengcheng Shang, Saurav Misra, Ben Hause, Ying Fang
Enteroviruses are implicated in a wide range of diseases in human and animals. In this study, a novel enterovirus (species G; EVG 08/NC_USA/2015) was isolated from a diagnostic sample of neonatal pig diarrhea case and identified using metagenomics and complete genome sequencing. The viral genome shares 75.4% nucleotide identity with a prototypic EVG strain (PEV9 UKG/410/73). Remarkably, a 582 nucleotide insertion, flanked by 3C(pro) cleavage sites at 5' - and 3' - ends, was found in the 2C/3A junction region of the viral genome...
May 10, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28488715/van-der-waals-interaction-between-a-moving-nano-cylinder-and-a-liquid-thin-film
#18
René Ledesma-Alonso, Elie Raphaël, Thomas Salez, Philippe Tordjeman, Dominique Legendre
We study the static and dynamic interaction between a horizontal cylindrical nano-probe and a thin liquid film. The effects of the physical and geometrical parameters, with a special focus on the film thickness, the probe speed, and the distance between the probe and the free surface are analyzed. Deformation profiles have been computed numerically from a Reynolds lubrication equation, coupled to a modified Young-Laplace equation, which takes into account the probe/liquid and the liquid/substrate non-retarded van der Waals interactions...
May 24, 2017: Soft Matter
https://www.readbyqxmd.com/read/28485945/direct-observation-of-interactions-between-nanoparticles-and-nanoparticle-self-assembly-in-solution
#19
Shu Fen Tan, See Wee Chee, Guanhua Lin, Utkur Mirsaidov
Hierarchically organized nanoparticles (NPs) possess unique properties and are relevant to various technological applications. An important "bottom-up" strategy for building such hierarchical nanostructures is to guide the individual NPs into ordered nanoarchitectures using intermolecular interactions and external forces. However, our current understanding of the nanoscale interactions that govern such self-assembly processes usually relies on post-synthesis/assembly or indirect characterization. Theoretical models that can derive these interactions are presently constrained to systems with only a few particles or on short time scales...
May 9, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28484411/age-related-interference-between-the-selection-of-input-output-modality-mappings-and-postural-control-a-pilot-study
#20
Christine Stelzel, Gesche Schauenburg, Michael A Rapp, Stephan Heinzel, Urs Granacher
Age-related decline in executive functions and postural control due to degenerative processes in the central nervous system have been related to increased fall-risk in old age. Many studies have shown cognitive-postural dual-task interference in old adults, but research on the role of specific executive functions in this context has just begun. In this study, we addressed the question whether postural control is impaired depending on the coordination of concurrent response-selection processes related to the compatibility of input and output modality mappings as compared to impairments related to working-memory load in the comparison of cognitive dual and single tasks...
2017: Frontiers in Psychology
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