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https://www.readbyqxmd.com/read/28091823/skeletal-muscle-inflammation-and-atrophy-in-heart-failure
#1
Kory J Lavine, Oscar L Sierra
Heart failure represents a systemic disease with profound effects on multiple peripheral tissues including skeletal muscle. Within the context of heart failure, perturbations in skeletal muscle physiology, structure, and function strongly contribute to exercise intolerance and the morbidity of this devastating disease. There is growing evidence that chronic heart failure imparts specific pathological changes within skeletal muscle beds resulting in muscle dysfunction and tissue atrophy. Mechanistically, systemic and local inflammatory responses drive critical aspects of this pathology...
January 14, 2017: Heart Failure Reviews
https://www.readbyqxmd.com/read/28075341/a-non-invasive-multichannel-hybrid-fiber-optic-sensor-system-for-vital-sign-monitoring
#2
Marcel Fajkus, Jan Nedoma, Radek Martinek, Vladimir Vasinek, Homer Nazeran, Petr Siska
In this article, we briefly describe the design, construction, and functional verification of a hybrid multichannel fiber-optic sensor system for basic vital sign monitoring. This sensor uses a novel non-invasive measurement probe based on the fiber Bragg grating (FBG). The probe is composed of two FBGs encapsulated inside a polydimethylsiloxane polymer (PDMS). The PDMS is non-reactive to human skin and resistant to electromagnetic waves, UV absorption, and radiation. We emphasize the construction of the probe to be specifically used for basic vital sign monitoring such as body temperature, respiratory rate and heart rate...
January 8, 2017: Sensors
https://www.readbyqxmd.com/read/28074466/anatomical-organization-of-the-brain-of-a-diurnal-and-a-nocturnal-dung-beetle
#3
Esa-Ville Immonen, Marie Dacke, Stanley Heinze, Basil El Jundi
To avoid the fierce competition for food, South African ball-rolling dung beetles carve a piece of dung off a dung-pile, shape it into a ball and roll it away along a straight line path. For this unidirectional exit from the busy dung pile, at night and day, the beetles use a wide repertoire of celestial compass cues. This robust and relatively easily measurable orientation behavior has made ball-rolling dung beetles an attractive model organism for the study of the neuroethology behind insect orientation and sensory ecology...
January 11, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28069922/mechanisms-of-nmda-receptor-and-voltage-gated-l-type-calcium-channel-dependent-hippocampal-ltp-critically-rely-on-proteolysis-that-is-mediated-by-distinct-metalloproteinases
#4
Grzegorz Wiera, Daria Nowak, Inge Van Hove, Piotr Dziegiel, Lieve Moons, Jerzy W Mozrzymas
: Long-term potentiation (LTP) is widely perceived as a memory substrate and in the hippocampal CA3-CA1 pathway, distinct forms of LTP depend on N-methyl-D-aspartate (NMDA) receptors (nmdaLTP) or L-type voltage-gated calcium channels (vdccLTP). Long-term potentiation is also known to be effectively regulated by extracellular proteolysis that is mediated by various enzymes. Herein, we investigated whether in mice hippocampal slices these distinct forms of LTP are specifically regulated by different metalloproteinases (MMPs)...
January 9, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28062850/cellular-strain-avoidance-is-mediated-by-a-functional-actin-cap-observations-in-an-lmna-deficient-cell-model
#5
Chiara Tamiello, Maurice Halder, Miriam A F Kamps, Frank P T Baaijens, Jos L V Broers, Carlijn V C Bouten
In adherent cells the relevance of a physical mechanotransduction pathway provided by the perinuclear actin cap stress fibers has recently emerged. Here, we investigate the impact of a functional actin cap on the cellular adaptive response to topographical cues and uniaxial cyclic strain. Lmna-deficient fibroblasts are used as a model system because they do not develop an intact actin cap, but predominantly form a basal layer of actin stress fibers underneath the nucleus. We observe that topographical cues induce alignment in both normal and lmna-deficient fibroblasts, suggesting that topographical signal transmission occurs independently of the integrity of the actin cap...
January 6, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28054589/large-scale-thick-self-assembled-nacre-mimetic-brick-walls-as-fire-barrier-coatings-on-textiles
#6
Paramita Das, Helga Thomas, Martin Moeller, Andreas Walther
Highly loaded polymer/clay nanocomposites with layered structures are emerging as robust fire retardant surface coatings. However, time-intensive sequential deposition processes, e.g. layer-by-layer strategies, hinders obtaining large coating thicknesses and complicates an implementation into existing technologies. Here, we demonstrate a single-step, water-borne approach to prepare thick, self-assembling, hybrid fire barrier coatings of sodium carboxymethyl cellulose (CMC)/montmorillonite (MTM) with well-defined, bioinspired brick-wall nanostructure, and showcase their application on textile...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28054212/assessing-posterior-ocular-structures-in-%C3%AE-thalassemia-minor
#7
Hasan Basri Arifoglu, Bekir Kucuk, Necati Duru, Orhan Altunel, Ahmet Gulhan, Mustafa Ozen, Bilal Aygun, Mustafa Atas
PURPOSE: The aim of this study was to investigate the effect of β-thalassemia minor on choroidal, macular, and peripapillary retinal nerve fiber layer thickness. METHODS: To form the sample, we recruited 40 patients with β-thalassemia minor and 44 healthy participants. We used spectral-domain optical coherence tomography to take all measurements of ocular thickness, as well as measured intraocular pressure, axial length, and central corneal thickness. We later analyzed correlations of hemoglobin levels with ocular parameters...
January 4, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28052852/high-dose-ampicillin-sulbactam-combinations-combat-polymyxin-resistant-acinetobacter-baumannii-in-a-hollow-fiber-infection-model
#8
Justin R Lenhard, Nicholas M Smith, Zackery P Bulman, Xun Tao, Visanu Thamlikitkul, Beom S Shin, Roger L Nation, Jian Li, Jürgen B Bulitta, Brian T Tsuji
Acinetobacter baumannii are emerging with resistance to polymyxins. In 24h time-killing experiments, high dose ampicillin/sulbactam in combination with meropenem and polymyxin B achieved additivity or synergy against 10(8)CFU/mL of two clinical A. baumannii isolates resistant to all three drugs (max reductions 1.6 and 3.1 logs). In 14-day hollow-fiber infection models, high dose ampicillin/sulbactam (8/4g q8h) in combination with meropenem (2g q8h) and polymyxin B (1.43 mg/kg q12h with loading dose) achieved rapid eradication (96h)...
January 4, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28039371/granular-layer-neurons-control-cerebellar-neurovascular-coupling-through-an-nmda-receptor-no-dependent-system
#9
Lisa Mapelli, Giuseppe Gagliano, Teresa Soda, Umberto Laforenza, Francesco Moccia, Egidio D'Angelo
: Neurovascular coupling (NVC) is the process whereby neuronal activity controls blood vessel diameter. In the cerebellum, the molecular layer is regarded as the main NVC determinant. However, the granular layer is a region with variable metabolic demand caused by large activity fluctuations, that shows a prominent expression of NMDA receptors (NMDARs) and nitric oxide synthase (NOS) and is therefore much more suitable for effective NVC. Here we show that, in the granular layer of acute rat cerebellar slices, capillary diameter rapidly changes following mossy fiber stimulation...
December 30, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28039038/transient-receptor-potential-vanilloid-6-trpv6-in-the-mouse-brain-distribution-and-estrous-cycle-related-changes-in-the-hypothalamus
#10
Santosh Kumar, Uday Singh, Omprakash Singh, Chandan Goswami, Praful S Singru
Transient receptor potential vanilloid (TRPV) subfamily of cationic channels have emerged as novel players in neural regulation. Unlike other members of TRPV subfamily, TRPV5 and TRPV6 are highly Ca(2+)-selective and temperature insensitive. Although TRPV5/TRPV6 transcripts are expressed in mouse brain, understanding the full functional spectrum of these channels in the brain is however limited due to the lack of information on their neuroanatomical distribution. We studied TRPV6 in mouse brain in further detail...
December 28, 2016: Neuroscience
https://www.readbyqxmd.com/read/28035339/emerging-roles-for-histone-deacetylases-in-age-related-muscle-atrophy
#11
REVIEW
Michael E Walsh, Holly Van Remmen
BACKGROUND: Skeletal muscle atrophy during aging, a process known as sarcopenia, is associated with muscle weakness, frailty, and the loss of independence in older adults. The mechanisms contributing to sarcopenia are not totally understood, but muscle fiber loss due to apoptosis, reduced stimulation of anabolic pathways, activation of catabolic pathways, denervation, and altered metabolism have been observed in muscle from old rodents and humans. OBJECTIVE: Recently, histone deacetylases (HDACs) have been implicated in muscle atrophy and dysfunction due to denervation, muscular dystrophy, and disuse, and HDACs play key roles in regulating metabolism in skeletal muscle...
October 27, 2016: Nutr Healthy Aging
https://www.readbyqxmd.com/read/28029068/healthy-eating-attitudes-and-the-incidence-of-cardiovascular-disease-the-sun-cohort
#12
Susana Santiago, Itziar Zazpe, Alfredo Gea, Pedro A de la Rosa, Miguel Ruiz-Canela, Miguel A Martínez-González
There is an emerging use of brief dietary questionnaires to investigate diet-health relation. We prospectively assess the association between eating attitudes (yes/no) and incident cardiovascular disease (CVD) in 19,138 participants of the Seguimiento Universidad de Navarra (SUN) Cohort. We calculated a baseline healthy-eating attitudes score (in quartiles), positively weighting answers on more fruit, vegetables, fish and fiber and less meat, sweets and pastries, fat, butter, fatty meats and added sugar in drinks...
December 28, 2016: International Journal of Food Sciences and Nutrition
https://www.readbyqxmd.com/read/28025371/prevalence-of-myofascial-pain-syndrome-in-chronic-non-specific-neck-pain-a-population-based-cross-sectional-descriptive-study
#13
Ester Cerezo-Téllez, María Torres-Lacomba, Orlando Mayoral-Del Moral, Beatriz Sánchez-Sánchez, Jan Dommerholt, Carlos Gutiérrez-Ortega
BACKGROUND: Chronic non-specific neck pain is a frequent complaint. It is a recognized medical and socioeconomic problem and a frequent cause of job absenteeism. In recent years, case reports about myofascial pain syndrome (MPS) are emerging among patients suffering from pain. MPS is a regional pain syndrome characterized by myofascial trigger points (MTrP) in palpable taut bands of skeletal muscle that refer pain to a distance, and that can cause distant motor and autonomic effects. OBJECTIVE: To assess the prevalence of active and latent MTrPs in subjects suffering from chronic non-specific neck pain...
December 2016: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28008311/cloning-of-the-gabab-receptor-subunits-b1-and-b2-and-their-expression-in-the-central-nervous-system-of-the-adult-sea-lamprey
#14
Daniel Romaus-Sanjurjo, Blanca Fernández-López, Daniel Sobrido-Cameán, Antón Barreiro-Iglesias, María Celina Rodicio
In vertebrates, γ-aminobutyric acid (GABA) is the main inhibitory transmitter in the central nervous system (CNS) acting through ionotropic (GABAA) and metabotropic (GABAB) receptors. The GABAB receptor produces a slow inhibition since it activates second messenger systems through the binding and activation of guanine nucleotide-binding proteins [G-protein-coupled receptors (GPCRs)]. Lampreys are a key reference to understand molecular evolution in vertebrates. The importance of the GABAB receptor for the modulation of the circuits controlling locomotion and other behaviors has been shown in pharmacological/physiological studies in lampreys...
2016: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/28007490/gut-brain-nutrient-sensing-in-food-reward
#15
Ari Shechter, Gary J Schwartz
For the past several decades, vagal and hormonal gut-brain negative feedback signaling mechanisms that promote satiety and subsequent suppression of food intake have been explored. In addition, a separate positive feedback process termed "appetition," involving postoral signaling from the gut to the brain, has been shown to promote food intake and produce flavor-nutrient preference conditioning. Afferent fibers emerging from the vagus nerve form the main pathway by which information is relayed from the abdominal viscera to the hindbrain and eventually other higher brain regions involved in food intake...
December 20, 2016: Appetite
https://www.readbyqxmd.com/read/28002767/adsorption-of-pharmaceuticals-in-water-through-lignocellulosic-fibers-synergism
#16
Tatiana Rojo Moro, Francini Reis Henrique, Lucca Centa Malucelli, Cíntia Mara Ribas de Oliveira, Marco Aurélio da Silva Carvalho Filho, Eliane Carvalho de Vasconcelos
The contamination of water from disposal of drugs is an emerging problem due to their consequences on trophic webs. This study evaluated the ability of sugarcane and coconut fiber to reduce water toxicity contaminated by pharmaceuticals. The toxicity of solutions containing pharmaceuticals was studied by bioassay using Allium cepa, before and after filtration of contaminated water. The coconut and sugarcane fiber have not been satisfactory in reducing toxicity when tested separately. Despite no induction of chromosomal aberrations, our study found a reduction of the mitotic index...
December 12, 2016: Chemosphere
https://www.readbyqxmd.com/read/28001326/3d-interconnected-carbon-fiber-network-enabled-ultralong-life-na3-v2-po4-3-carbon-paper-cathode-for-sodium-ion-batteries
#17
Katja Kretschmer, Bing Sun, Jinqiang Zhang, Xiuqiang Xie, Hao Liu, Guoxiu Wang
Sodium-ion batteries (NIBs) are an emerging technology, which can meet increasing demands for large-scale energy storage. One of the most promising cathode material candidates for sodium-ion batteries is Na3 V2 (PO4 )3 due to its high capacity, thermal stability, and sodium (Na) Superionic Conductor 3D (NASICON)-type framework. In this work, the authors have significantly improved electrochemical performance and cycling stability of Na3 V2 (PO4 )3 by introducing a 3D interconnected conductive network in the form of carbon fiber derived from ordinary paper towel...
December 21, 2016: Small
https://www.readbyqxmd.com/read/28000176/pathology-and-molecular-mechanisms-of-coarctation-of-the-aorta-and-its-association-with-the-ductus-arteriosus
#18
REVIEW
Utako Yokoyama, Yasuhiro Ichikawa, Susumu Minamisawa, Yoshihiro Ishikawa
Coarctation of the aorta (CoA) is defined as a congenital stenosis of the thoracic aorta and is one of the most common congenital cardiovascular diseases. Despite successful surgical treatment for CoA, arterial abnormalities, including refractory hypertension, aortic aneurysm, and proatherogenic phenotypic changes, frequently affect patients' quality of life. Emerging evidence from morphological and molecular biological investigations suggest that the area of CoA is characterized by phenotypic modulation of smooth muscle cells, intimal thickening, and impaired elastic fiber formation...
December 20, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27998214/fabrication-of-a-highly-aligned-neural-scaffold-via-a-table-top-stereolithography-3d-printing-and-electrospinning
#19
Se-Jun Lee, Margaret Nowicki, Brent Harris, Lijie Grace Zhang
Three-dimensional (3D) bioprinting is a rapidly emerging technique in the field of tissue engineering to fabricate extremely intricate and complex biomimetic scaffolds in the range of micrometers. Such customized 3D printed constructs can be used for the regeneration of complex tissues such as cartilage, vessels, and nerves. However, the 3D printing techniques often offer limited control over the resolution and compromised mechanical properties due to short selection of printable inks. To address these limitations, we combined stereolithography and electrospinning techniques to fabricate a novel 3D biomimetic neural scaffold with a tunable porous structure and embedded aligned fibers...
January 11, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/27995063/integrity-of-the-arcuate-fasciculus-in-patients-with-schizophrenia-with-auditory-verbal-hallucinations-a-dti-tractography-study
#20
Marion Psomiades, Clara Fonteneau, Marine Mondino, David Luck, Frederic Haesebaert, Marie-Françoise Suaud-Chagny, Jerome Brunelin
Auditory verbal hallucinations (AVH) of schizophrenia are associated with a disrupted connectivity between frontal and temporoparietal language areas. We hypothesized that this dysconnectivity is underpinned by white matter abnormalities in the left arcuate fasciculus, the main fiber bundle connecting speech production and perception areas. We therefore investigated the relationship between AVH severity and the integrity of the arcuate fasciculus measured by diffusion tensor imaging (DTI) tractography in patients with schizophrenia...
2016: NeuroImage: Clinical
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