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https://www.readbyqxmd.com/read/28214986/astrocyte-sodium-signalling-and-panglial-spread-of-sodium-signals-in-brain-white-matter
#1
Behrouz Moshrefi-Ravasdjani, Evelyn L Hammel, Karl W Kafitz, Christine R Rose
In brain grey matter, excitatory synaptic transmission activates glutamate uptake into astrocytes, inducing sodium signals which propagate into neighboring astrocytes through gap junctions. These sodium signals have been suggested to serve an important role in neuro-metabolic coupling. So far, it is unknown if astrocytes in white matter-that is in brain regions devoid of synapses-are also able to undergo such intra- and intercellular sodium signalling. In the present study, we have addressed this question by performing quantitative sodium imaging in acute tissue slices of mouse corpus callosum...
February 18, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28214960/axonal-disruption-in-white-matter-underlying-cortical-sulcus-tau-pathology-in-chronic-traumatic-encephalopathy
#2
Laurena Holleran, Joong Hee Kim, Mihika Gangolli, Thor Stein, Victor Alvarez, Ann McKee, David L Brody
Chronic traumatic encephalopathy (CTE) is a progressive degenerative disorder associated with repetitive traumatic brain injury. One of the primary defining neuropathological lesions in CTE, based on the first consensus conference, is the accumulation of hyperphosphorylated tau in gray matter sulcal depths. Post-mortem CTE studies have also reported myelin loss, axonal injury and white matter degeneration. Currently, the diagnosis of CTE is restricted to post-mortem neuropathological analysis. We hypothesized that high spatial resolution advanced diffusion MRI might be useful for detecting white matter microstructural changes directly adjacent to gray matter tau pathology...
February 18, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28214642/short-term-results-of-carotid-endarterectomy-and-stenting-after-the-introduction-of-carotid-magnetic-resonance-imaging-a-single-institutional-retrospective-study
#3
Ryu Fukumitsu, Kazumichi Yoshida, Yoshitaka Kurosaki, Koichi Torihashi, Nobutake Sadamasa, Masaomi Koyanagi, Osamu Narumi, Tsukasa Sato, Masaki Chin, Akira Handa, Sen Yamagata, Susumu Miyamoto
OBJECTIVE: While carotid artery stenting (CAS) has been gaining popularity as an alternative to carotid endarterectomy (CEA), the perioperative stroke rate following contemporary CAS remains significantly higher than that in CEA. The purpose of this study was to assess perioperative (within 30-day) therapeutic results in patients with carotid stenosis (CS) after the introduction of preoperative carotid magnetic resonance plaque evaluation in a single center offering both CEA and CAS. METHODS: Based on prospectively collected data for patients with CS who were scheduled for carotid revascularization, retrospective analysis was conducted of 295 consecutive CS patients...
February 15, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28214628/differences-in-biological-traits-composition-of-benthic-assemblages-between-unimpacted-habitats
#4
S G Bolam, C Garcia, J Eggleton, A J Kenny, L Buhl-Mortensen, G Gonzalez-Mirelis, T van Kooten, G Dinesen, J Hansen, J G Hiddink, M Sciberras, C Smith, N Papadopoulou, A Gumus, G Van Hoey, O R Eigaard, F Bastardie, A D Rijnsdorp
There is an implicit requirement under contemporary policy drivers to understand the characteristics of benthic communities under anthropogenically-unimpacted scenarios. We used a trait-based approach on a large dataset from across the European shelf to determine how functional characteristics of unimpacted benthic assemblages vary between different sedimentary habitats. Assemblages in deep, muddy environments unaffected by anthropogenic disturbance show increased proportions of downward conveyors and surface deposit-feeders, while burrowing, diffusive mixing, scavenging and predation traits assume greater numerical proportions in shallower habitats...
January 23, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28214506/comparison-of-the-extent-of-coronary-artery-disease-in-patients-with-versus-without-interatrial-block-and-implications-for-new-onset-atrial-fibrillation
#5
Bryce Alexander, Jimmy MacHaalany, Brandon Lam, Henri van Rooy, Sohaib Haseeb, Adrian Kuchtaruk, Benedict Glover, Antoni Bayés de Luna, Adrian Baranchuk
Interatrial block (IAB) represents delay or block of conduction between the atria. IAB has been shown to predict the development or recurrence of atrial fibrillation (AF) in various clinical scenarios. Few studies have examined the correlation between coronary artery disease and the prevalence of IAB and its impact on AF. The aim of this study was to determine if specific coronary artery lesions (location and number) are associated with the presence of IAB and development of new-onset AF. Retrospective analysis of patients presenting with non-ST-segment elevation myocardial infarction (NSTEMI) to our institution...
January 25, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28214479/diffuse-cerebral-edema-from-acute-pancreatitis-induced-by-hypertriglyceridemia
#6
Dalvir Gill, Natasha Sheikh, Amish Shah, Vanessa Goyes Ruiz, Dana Savici
No abstract text is available yet for this article.
February 15, 2017: American Journal of Medicine
https://www.readbyqxmd.com/read/28214438/stepwise-dynamics-of-an-anionic-micellar-film-formation-of-crown-lenses
#7
Jongju Lee, Alex Nikolov, Darsh Wasan
We studied the stepwise thinning of a microscopic circular foam film formed from an anionic micellar solution of sodium dodecyl sulfate (SDS). The foam film formed from the SDS micellar solution thins in a stepwise manner by the formation and expansion of a dark spot(s) of one layer less than the film thickness. During the last stages of film thinning (e.g., a film with one micellar layer), the dark spot expansion occurs via two steps. Initially, a small dark circular spot inside a film of several microns in size is formed, which expands at a constant rate...
January 31, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28214420/prevention-of-radiotherapy-induced-neurocognitive-dysfunction-in-survivors-of-paediatric-brain-tumours-the-potential-role-of-modern-imaging-and-radiotherapy-techniques
#8
REVIEW
Thankamma Ajithkumar, Stephen Price, Gail Horan, Amos Burke, Sarah Jefferies
Neurocognitive dysfunction is the leading cause of reduced quality of life in long-term survivors of paediatric brain tumours. Radiotherapy is one of the main contributors to neurocognitive sequelae. Current approaches for prevention and reduction of neurocognitive dysfunction include avoidance of radiotherapy in young children and reduction of the radiotherapy dose and volume of brain irradiated. Substantial advances have been made in brain imaging, especially with functional imaging and fibre tracking with the use of diffusion tensor imaging...
February 2017: Lancet Oncology
https://www.readbyqxmd.com/read/28214394/electrokinetic-enhanced-permanganate-delivery-and-remediation-of-contaminated-low-permeability-porous-media
#9
Ahmed I A Chowdhury, Jason I Gerhard, David Reynolds, Brent E Sleep, Denis M O'Carroll
Back diffusion of contaminants from low permeability strata has inhibited site remediation and closure due to an inability to deliver remediants into these strata. This study demonstrates the potential of electrokinetics (EK) to significantly reduce back diffusion of chlorinated compounds from low permeability porous media. Experiments were conducted in a two-dimensional sandbox packed with vertical layers of coarse sand and silt contaminated with aqueous trichloroethene (TCE). Three experiments, each approximately 41 days in duration, compared EK-enhanced in situ chemical oxidation (EK-ISCO) to EK or ISCO alone...
February 4, 2017: Water Research
https://www.readbyqxmd.com/read/28214390/robust-peptidoglycan-growth-by-dynamic-and-variable-multi-protein-complexes
#10
REVIEW
Manuel Pazos, Katharina Peters, Waldemar Vollmer
In Gram-negative bacteria such as Escherichia coli the peptidoglycan sacculus resides in the periplasm, a compartment that experiences changes in pH value, osmolality, ion strength and other parameters depending on the cell's environment. Hence, the cell needs robust peptidoglycan growth mechanisms to grow and divide under different conditions. Here we propose a model according to which the cell achieves robust peptidoglycan growth by employing dynamic multi-protein complexes, which assemble with variable composition from freely diffusing sets of peptidoglycan synthases, hydrolases and their regulators, whereby the composition of the active complexes depends on the cell cycle state - cell elongation or division - and the periplasmic growth conditions...
February 15, 2017: Current Opinion in Microbiology
https://www.readbyqxmd.com/read/28214332/comparison-of-several-white-matter-tracts-in-feline-and-canine-brain-by-using-magnetic-resonance-diffusion-tensor-imaging
#11
Olivier Jacqmot, Bert Van Thielen, Alex Michotte, Inneke Willekens, Filip Verhelle, Peter Goossens, Filip De Ridder, Jan Pieter Clarys, Anne Vanbinst, Cindy Peleman, Johan de Mey
Recently, we published a first anatomical Diffusion Tensor Imaging (DTI) atlas regarding white matter tracts in the canine brain. The purpose of this study was to show the significance of DTI in the revelation of the white matter fibres in the feline brain (i.e. to obtain an anatomical DTI atlas of images) and to descriptively compare these to previously obtained white matter fibre images of the canine brain. DTI MR Images of 4 cats euthanised for reasons other than neurological disorders were obtained with a 3 T system...
February 18, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28214203/prognostic-value-of-survivin-and-dna-topoisomerase-ii%C3%AE-in-diffuse-and-anaplastic-astrocytomas
#12
R K Varughese, A J Skjulsvik, S H Torp
Distinguishing WHO grade II astrocytomas from grade III is a difficult task. This study looks into the potential prognostic use of mitotic activity and the proliferation markers Ki67/MiB-1 (Ki67), survivin and DNA topoisomerase IIα (TIIα) in 59 WHO grade II diffuse astrocytomas (DA) and 33 WHO grade III anaplastic astrocytomas (AA), IDH1 R132H-mutated and not otherwise specified (NOS) by means of immunohistochemistry. All proliferation markers showed higher expression in AA compared with DA. Only Ki67 had significantly greater expression in astrocytomas, NOS vs...
January 21, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28214187/microbiological-analysis-antimicrobial-activity-and-heavy-metals-content-of-jordanian-ma-in-hot-springs-water
#13
Muhamad Ali K Shakhatreh, Jacob H Jacob, Emad I Hussein, Majed M Masadeh, Safwan M Obeidat, Abdul-Salam F Juhmani, Mutaz A Abd Al-Razaq
Ma'in hot springs are known as sites of balneotherapy. However, little is known about their microbiology and chemistry. In this study, we aim at evaluating the antimicrobial activity of Ma'in hot-springs water (MHSW), studying its microbiology, and determining its physicochemical properties including the heavy metals content. Therefore, water samples were collected from Ma'in hot springs and tested for antimicrobial activity using agar diffusion method. Water was then cultivated on nutrient agar to isolate and identify the dominant bacteria by chemical and molecular methods...
February 14, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28214153/arrhythmogenic-right-ventricular-dysplasia-atypical-clinical-presentation
#14
José Marçalo, Luiz Menezes Falcão
A 67-year-old man was admitted to our hospital after episodes of syncope preceded by malaise and diffuse neck and chest discomfort. No family history of cardiac disease was reported. Laboratory workup was within normal limits, including D-dimers, serum troponin I and arterial blood gases. The electrocardiogram showed sinus rhythm with T-wave inversion in leads V1 to V3. Computed tomography angiography to investigate pulmonary embolism showed no abnormal findings. Transthoracic echocardiography (TTE) displayed massive enlargement of the right ventricle with intact interatrial septum and no pulmonary hypertension...
February 14, 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/28214142/-a-case-of-rhinofacial-entomophthoromycosis-in-soudano-sahelian-tropical-climate-in-burkina-faso
#15
S Bamba, V Konsegré, A Zida, I Sangaré, M Cissé, R Beogo, B Diallo, J B Andonaba, R T Guiguemdé
We describe a rhinofacial entomophthoramycosis case in a sexagenarian (65 years old) housewife. She was immunocompetent and resident of Burkina Faso. She consulted both the service of dermatology and the service of stomatology of the Teaching Hospital of Bobo-Dioulasso in February 2016 for a diffuse facial tumefaction evolving over six months. This tumefaction was associated with headaches and a left nasal obstruction. Histological examination of the lesion showed an important and polymorphic inflammatory reaction...
February 14, 2017: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/28214123/a-tool-for-cost-effectiveness-analysis-of-field-scale-sediment-bound-phosphorus-mitigation-measures-and-application-to-analysis-of-spatial-and-temporal-targeting-in-the-lunan-water-catchment-scotland
#16
Andy Vinten, James Sample, Adekunle Ibiyemi, Yakubu Abdul-Salam, Marc Stutter
The cost-effectiveness of six edge-of-field measures for mitigating diffuse pollution from sediment bound phosphorus (P) runoff from temperate arable farmland is analysed at catchment/field scales. These measures were: buffer strips, permanent grassland in the lowest 7% of arable fields, dry detention bunds, wetlands, and temporary barriers such as sediment fences. Baseline field P export was estimated using export coefficients (low risk crops) or a modified Universal Soil Loss Equation (high risk crops). The impact of measures was estimated using simple equations...
February 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28214088/a-case-of-seropositive-autoimmune-autonomic-ganglionopathy-with-diffuse-esophageal-spasm
#17
Nobutoshi Morimoto, Sakuma Takahashi, Tomoki Inaba, Motonori Takamiya, Yasuhiko Kageyama, Mizuki Morimoto, Yoshiaki Takahashi, Hirotake Nishimura, Shunya Nakane, Koji Abe
Autoimmune autonomic ganglionopathy (AAG) is an immune-mediated disorder that leads to various autonomic failures associated with anti-ganglionic acetylcholine receptor antibodies (anti-gAChR-Abs). Diffuse esophageal spasm (DES) is an uncommon esophageal motility disorder. We herein report the case of a 68-year-old woman with DES as a partial symptom of AAG. She presented with chronic esophageal transit failure, constipation, and numbness of the hands and feet, Adie's pupil, thermal hypoalgesia, and decreased deep tendon reflexes...
February 14, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28214036/impact-of-filling-gas-on-subharmonic-emissions-of-phospholipid-ultrasound-contrast-agents
#18
Emma Kanbar, Damien Fouan, Charles A Sennoga, Alexander A Doinikov, Ayache Bouakaz
Subharmonic signals backscattered from gas-filled lipid-shelled microbubbles have generated significant research interest because they can improve the detection and sensitivity of contrast-enhanced ultrasound imaging. However, the emission of subharmonic signals is strongly characterized by a temporal dependence, the origins of which have not been sufficiently elucidated. The features that influence subharmonic emissions need to be identified not only to better develop next-generation microbubble contrast agents, but also to develop more efficient subharmonic imaging (SHI) modes and therapeutic strategies...
February 14, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28213987/superficially-porous-particles-with-1000%C3%A3-pores-for-large-biomolecule-high-performance-liquid-chromatography-and-polymer-size-exclusion-chromatography
#19
Brian M Wagner, Stephanie A Schuster, Barry E Boyes, Taylor J Shields, William L Miles, Mark J Haynes, Robert E Moran, Joseph J Kirkland, Mark R Schure
To facilitate mass transport and column efficiency, solutes must have free access to particle pores to facilitate interactions with the stationary phase. To ensure this feature, particles should be used for HPLC separations which have pores sufficiently large to accommodate the solute without restricted diffusion. This paper describes the design and properties of superficially porous (also called Fused-Core(®), core shell or porous shell) particles with very large (1000Å) pores specifically developed for separating very large biomolecules and polymers...
January 31, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28213824/an-approach-to-the-research-on-ion-and-water-properties-in-the-interphase-between-the-plasma-membrane-and-bulk-extracellular-solution
#20
REVIEW
Hiroshi Hibino, Madoka Takai, Hidenori Noguchi, Seishiro Sawamura, Yasufumi Takahashi, Hideki Sakai, Hitoshi Shiku
In vivo, cells are immersed in an extracellular solution that contains a variety of bioactive substances including ions and water. Classical electrophysiological analyses of epithelial cells in the stomach and small intestine have revealed that within a distance of several hundred micrometers above their apical plasma membrane, lies an extracellular layer that shows ion concentration gradients undetectable in the bulk phase. This "unstirred layer", which contains stagnant solutes, may also exist between the bulk extracellular solution and membranes of other cells in an organism and may show different properties...
February 17, 2017: Journal of Physiological Sciences: JPS
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