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https://www.readbyqxmd.com/read/28214952/novel-potential-scaffold-for-periodontal-tissue-engineering
#1
Raquel Osorio, Camilo Andrés Alfonso-Rodríguez, Estrella Osorio, Antonio L Medina-Castillo, Miguel Alaminos, Manuel Toledano-Osorio, Manuel Toledano
OBJECTIVE: The objective of the study is characterization of novel calcium and zinc-loaded electrospun matrices to be used for periodontal regeneration. MATERIALS AND METHODS: A polymethylmetacrylate-based membrane was calcium or zinc loaded. Matrices were characterized morphologically by atomic force and scanning electron microscopy and mechanically probed by a nanoindenter. Biomimetic calcium phosphate precipitation on polymeric tissues was assessed. Cell viability tests were performed using oral mucosa fibroblasts...
February 18, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28214945/characterization-of-tunneling-nanotubes-in-wharton-s-jelly-mesenchymal-stem-cells-an-intercellular-exchange-of-components-between-neighboring-cells
#2
Viviana Sanchez, Nerina Villalba, Luciano Fiore, Carlos Luzzani, Santiago Miriuka, Alberto Boveris, Ricardo J Gelpi, Alicia Brusco, Juan José Poderoso
Intercellular communication is one of the most important events in cell population behavior. In the last decade, tunneling nanotubes (TNTs) have been recognized as a new form of long distance intercellular connection. TNT function is to allow molecular and subcellular structure exchange between neighboring cells via the transfer of molecules and organelles such as calcium ions, prions, viral and bacterial pathogens, small lysosomes and mitochondria. New findings support the concept that mesenchymal stem cells (MSCs) can affect cell microenvironment by the release of soluble factors or the transfer of cellular components to neighboring cells, in a way which significantly contributes to cell regulation and tissue repair, although the underlying mechanisms remain poorly understood...
February 18, 2017: Stem Cell Reviews
https://www.readbyqxmd.com/read/28214649/evaluation-of-dioxins-and-dioxin-like-compounds-from-a-cement-plant-using-carbide-slag-from-chlor-alkali-industry-as-the-major-raw-material
#3
Yuyang Zhao, Jiayu Zhan, Guorui Liu, Minghui Zheng, Rong Jin, Lili Yang, Liwei Hao, Xiaolin Wu, Xian Zhang, Pu Wang
Carbide slag produced from chlor-alkali industry contains high amounts of calcium compounds and can potentially be used as raw material for cement production; however, it contains large amounts of chlorine so it is essential to evaluate the emissions of chlorinated organic pollutants, including polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), and polychlorinated naphthalenes (PCNs). A field study of the emission profiles of these pollutants in a cement plant using such slag was performed...
February 14, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28214555/identification-of-a-fatty-acid-binding-protein4-ucp2-axis-regulating-microglial-mediated-neuroinflammation
#4
Cayla M Duffy, Hongliang Xu, Joshua P Nixon, David A Bernlohr, Tammy A Butterick
Hypothalamic inflammation contributes to metabolic dysregulation and the onset of obesity. Dietary saturated fats activate microglia via a nuclear factor-kappa B (NFκB) mediated pathway to release pro-inflammatory cytokines resulting in dysfunction or death of surrounding neurons. Fatty acid binding proteins (FABPs) are lipid chaperones regulating metabolic and inflammatory pathways in response to fatty acids. Loss of FABP4 in peripheral macrophages via either molecular or pharmacologic mechanisms results in reduced obesity-induced inflammation via a UCP2-redox based mechanism...
February 15, 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/28214516/saturation-of-long-term-potentiation-in-the-dorsal-cochlear-nucleus-and-its-pharmacological-reversal-in-an-experimental-model-of-tinnitus
#5
Thomas Tagoe, Daniel Deeping, Martine Hamann
Animal models have demonstrated that tinnitus is a pathology of dysfunctional excitability in the central auditory system, in particular in the dorsal cochlear nucleus (DCN) of the brainstem. We used a murine model and studied whether acoustic over-exposure leading to hearing loss and tinnitus, affects long-term potentiation (LTP) at DCN multisensory synapses. Whole cell and field potential recordings were used to study the effects on release probability and synaptic plasticity, respectively in brainstem slices...
February 15, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28214378/calcium-signaling-through-l-type-calcium-channels-role-in-pathophysiology-of-spinal-nociceptive-transmission
#6
REVIEW
Olivier Roca-Lapirot, Houda Radwani, Franck Aby, Frédéric Nagy, Marc Landry Pascal Fossat
L-type voltage-gated calcium channels (VGCCs) are ubiquitous channels in the central nervous system. L-type calcium channels (LTCs) are mostly post-synaptic channels regulating neuronal firing and gene expression. They play a role in important physio-pathological processes such as learning and memory, Parkinson's disease, autism and, as recognized more recently, in the pathophysiology of pain processes. Classically, the fundamental role of these channels in cardiovascular functions has limited the use of classical molecules to treat LTC-dependent disorders...
February 18, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28214372/canonical-and-cellular-pathways-timing-gamete-release-in-acropora-digitifera-okinawa-japan
#7
Y Rosenberg, T Doniger, S Harii, F Sinniger, O Levy
Natural light cycles are important for synchronizing behavioral and physiological rhythms over varying time-periods in both plants and animals. An endogenous clock, regulated by positive and negative elements, interacting in feedback loops, control these rhythms. Many corals exhibit diel cycles of polyp expansion and contraction entrained by solar light patterns and monthly cycles of spawning or planulation that correspond to nocturnal lunar light cycles. However, despite considerable interest in studies of coral reproduction, there is currently not enough molecular information about the cellular pathways involved with synchronizing spawning/planulation in broadcast spawners and brooders...
February 18, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28214296/abnormally-high-and-heterogeneous-bone-matrix-mineralization-after-childhood-solid-organ-transplantation-a-complex-pathology-of-low-bone-turnover-and-local-defects-in-mineralization
#8
Nadja Fratzl-Zelman, Helena Valta, Renata C Pereira, Barbara M Misof, Paul Roschger, Hannu Jalanko, Kathrine Wesseling-Perry, Klaus Klaushofer, Outi Mäkitie
Chronic renal, liver and heart failure in children associates with multiple skeletal complications. Increased fracture incidence often persists after transplantation and could be related to alterations in bone material properties. In the present cohort study we evaluated bone mineralization density distribution (BMDD) by quantitative backscattered electron imaging (qBEI) in 23 pediatric solid organ allograft recipients with suspected osteoporosis. We measured BMDD in the entire cross-sectional area of transiliac bone biopsies obtained from kidney (n = 9), liver (n = 9) and heart (n = 5) transplant recipients (aged 7...
February 18, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28214194/orthogeriatric-activity-in-a-general-hospital-of-castilla-la-mancha-spain
#9
J M Fernández-Ibáñez, M C Morales-Ballesteros, E Crespo-Romero, S Gómez-Gómez, M D Fraga-Fuentes, J Cruz-Tejado, P A Hernández-Zegarra, Á Arias-Arias, M M García-Baltasar
AIM: To describe the orthogeriatric activity in the elderly with hip fractures in the Hospital Mancha Centro, based on the recommendations of the main guidelines. MATERIAL AND METHOD: Observational prospective study, comprising all patients over 65 years of age admitted to the Traumatology Unit with a hip fracture between April 2015 and December 2015. Patients were admitted under the care of the Traumatology Unit with cross-consultation carried out with the Geriatrics Department, which then carried out a pre-operative geriatric assessment and the post-operative follow-ups...
February 14, 2017: Revista Española de Cirugía Ortopédica y Traumatología
https://www.readbyqxmd.com/read/28214096/maintenance-fluid-therapy-in-a-tertiary-hospital-a-prevalence-study
#10
R Uña Orejón, L Gisbert de la Cuadra, D Garríguez Pérez, J Díez Sebastián, M P Ureta Tolsada
OBJECTIVE: To assess the types of maintenance fluids used in our hospital, comparing their volume and composition to the standards recommended by the guidelines. MATERIAL AND METHODS: Observational, cross-sectional study. Volume and type of fluid therapy administered during 24h to patients admitted to various hospital departments were recorded. Patients receiving fluid therapy because of water-electrolyte imbalance were excluded. RESULTS: Out of 198 patients registered, 74 (37...
February 14, 2017: Revista Española de Anestesiología y Reanimación
https://www.readbyqxmd.com/read/28213963/ultrastructure-of-compatible-and-incompatible-interactions-in-phloem-sieve-elements-during-the-stylet-penetration-by-cotton-aphids-in-melon
#11
Elisa Garzo, Mercedes Fernández-Pascual, Cesar Morcillo, Alberto Fereres, M Luisa Gómez-Guillamón, W Fred Tjallingii
Resistance of the melon line TGR-1551 to the aphid Aphis gossypii is based on preventing aphids from ingesting phloem sap. In electrical penetration graphs (EPGs), this resistance has been characterized with A. gossypii showing unusually long phloem salivation periods (waveform E1) mostly followed by pathway activities (waveform C) or if followed by phloem ingestion (waveform E2), ingestion was not sustained for more than 10 minutes. Stylectomy with aphids on susceptible and resistant plants was performed during EPG recording while the stylet tips were phloem inserted...
February 18, 2017: Insect Science
https://www.readbyqxmd.com/read/28213926/association-of-hypercalcemia-before-treatment-with-hypocalcemia-after-treated-in-dogs-with-primary-hyperparathyroidism
#12
J D Dear, P H Kass, A M Della Maggiore, E C Feldman
BACKGROUND: Development of hypocalcemia after treatment of hyperparathyroidism results in increased costs and risk of poorer outcomes. Previous studies have shown conflicting data about predictors of hypocalcemia after these procedures. HYPOTHESIS/OBJECTIVES: The objective of this study was to investigate whether ionized calcium (iCa) concentrations before treatment are predictive of hypocalcemia or its clinical signs after surgical removal or heat ablation in dogs with primary hyperparathyroidism...
February 18, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28213657/the-roles-of-uvb-and-vitamin-d-in-reducing-risk-of-cancer-incidence-and-mortality-a-review-of-the-epidemiology-clinical-trials-and-mechanisms
#13
REVIEW
Meis Moukayed, William B Grant
Global cancer incidence and mortality rates are high and increasing. Thus, it is imperative to find novel solutions to preventing cancer incidence and treating it at an affordable yet efficacious manner. The solar UVB-vitamin D-cancer hypothesis was first proposed in 1980 based on a geographical ecological study. Since then, numerous ecological and observational studies as well as studies of mechanisms have provided support for the hypothesis. However, observational studies have not provided consistent support, in part due to using a single blood draw from any season to use for serum 25-hydroxyvitamin D [25(OH)D] concentration in prospective studies with long follow-up times...
February 17, 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28213506/role-of-apamin-sensitive-calcium-activated-small-conductance-potassium-currents-on-the-mechanisms-of-ventricular-fibrillation-in-pacing-induced-failing-rabbit-hearts
#14
Dechun Yin, Yu-Cheng Hsieh, Wei-Chung Tsai, Adonis Zhi-Yang Wu, Zhaolei Jiang, Yi-Hsin Chan, Dongzhu Xu, Na Yang, Changyu Shen, Zhenhui Chen, Shien-Fong Lin, Peng-Sheng Chen, Thomas H Everett
BACKGROUND: Ventricular fibrillation (VF) during heart failure is characterized by stable reentrant spiral waves (rotors). Apamin-sensitive small-conductance calcium-activated potassium currents (IKAS) are heterogeneously upregulated in failing hearts. We hypothesized that IKAS influences the location and stability of rotors during VF. METHODS AND RESULTS: Optical mapping was performed on 9 rabbit hearts with pacing-induced heart failure. The epicardial right ventricular and left ventricular surfaces were simultaneously mapped in a Langendorff preparation...
February 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28213442/amplitude-normalization-of-dendritic-epsps-at-the-soma-of-binaural-coincidence-detector-neurons-of-the-medial-superior-olive
#15
Bradley D Winters, Shan-Xue Jin, Kenneth R Ledford, Nace L Golding
The principal neurons of the medial superior olive (MSO) encode cues for horizontal sound localization through comparisons of the relative timing of excitatory postsynaptic potentials (EPSPs). To understand how the timing and amplitude of EPSPs is maintained during propagation in the dendrites, we made dendritic and somatic whole-cell recordings from MSO principal neurons in brain slices from Mongolian gerbils. In somatic recordings, EPSP amplitudes were largely uniform following minimal stimulation of excitatory synapses at visualized locations along the dendrites...
February 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28213291/hepatoprotective-effect-of-2-o-galloylhyperin-against-oxidative-stress-induced-liver-damage-through-induction-of-nrf2-are-mediated-antioxidant-pathway
#16
Peng Wang, Yi-Meng Gao, Xing Sun, Na Guo, Ji Li, Wei Wang, Li-Ping Yao, Yu-Jie Fu
2'-O-galloylhyperin (2'-O-GH), an active compound isolated from Pyrola calliantha, possesses remarkable antioxidant activity. The aims of this study were to investigate the hepatoprotective effect of 2'-O-GH against oxidative stress and elucidate the underlying mechanistic signaling pathways in HepG2 cells as well as in an animal model. Results showed that 2'-O-GH significantly inhibited hydrogen peroxide (H2O2)-induced HepG2 cell death in a dose dependent manner. The mitogen-activated protein kinase activation, ROS production, mitochondrial membrane potential, intracellular calcium level and subsequent apoptotic protein activation in H2O2-stimulated HepG2 cells were remarkably inhibited by 2'-O-GH...
February 14, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28213158/pink1-parkin-mitophagy-and-neurodegeneration-what-do-we-really-know-in-vivo
#17
REVIEW
Alexander J Whitworth, Leo J Pallanck
Mitochondria are essential organelles that provide cellular energy and buffer cytoplasmic calcium. At the same time they produce damaging reactive oxygen species and sequester pro-apoptotic factors. Hence, eukaryotes have evolved exquisite homeostatic processes that maintain mitochondrial integrity, or ultimately remove damaged organelles. This subject has garnered intense interest recently following the discovery that two Parkinson's disease genes, PINK1 and parkin, regulate mitochondrial degradation (mitophagy)...
February 14, 2017: Current Opinion in Genetics & Development
https://www.readbyqxmd.com/read/28213154/density-and-neurochemical-profiles-of-neuronal-nitric-oxide-synthase-expressing-interneuron-in-the-mouse-basolateral-amygdala
#18
Xiaona Wang, Chunhua Liu, Xiaochen Wang, Fei Gao, Ren-Zhi Zhan
Neuronal nitric oxide synthase (nNOS)-expressing interneurons reside in the basolateral nucleus of the amygdala (BLA) of rodents. In the present study, we immunohistochemically analyzed nNOS-positive cells in the mouse BLA by focusing on their density, γ-Aminobutyric acid (GABA)ergicity, and co-localization with calcium-binding proteins and neuropeptides. The density of nNOS-containing neurons was analyzed with unbiased stereology. Experiments were conducted in both adult wild-type C57BL/6 and glutamic acid decarboxylase-green fluorescence protein (GAD67-GFP) knock-in mice, in which GFP is expressed in GABAergic neurons under the control of the endogenous GAD67 gene promoter...
February 14, 2017: Brain Research
https://www.readbyqxmd.com/read/28213053/nerol-triggers-mitochondrial-dysfunction-and-disruption-via-elevation-of-ca-2-and-ros-in-candida-albicans
#19
Jun Tian, Zhaoqun Lu, Yanzhen Wang, Man Zhang, Xueyan Wang, Xudong Tang, Xue Peng, Hong Zeng
The antifungal activity of Nerol (NEL) against Candida albicans, a pathogenic fungus, has a minimum inhibitory concentration (MIC) of 4.4mM that causes noteworthy candidacidal activity through an apoptosis-like mechanism. Calcium (Ca(2+)) levels and reactive oxygen species (ROS) production, which are the major causes of apoptosis, were determined in C. albicans cells treated with NEL and were found to increase, which related to mitochondrial dysfunction and disruption. A series of characteristic changes of apoptosis caused by NEL, including mitochondrial membrane depolarization, cytochrome c (cyt c) release, and metacaspase activation were examined using a flow cytometer and Western blot...
February 14, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28213035/influence-of-electro-activated-solutions-of-weak-organic-acid-salts-on-microbial-quality-and-overall-appearance-of-blueberries-during-storage
#20
Viacheslav Liato, Riadh Hammami, Mohammed Aïder
The aim of this work was to study the potential of diluted electro-activated solutions of weak organic acid salts (potassium acetate, potassium citrate and calcium lactate) to extend the shelf life of blueberries during post-harvest storage. The sanitizing capacity of these solutions was studied against pathogenic bacteria Listeria monocytogenes and E. coli O157:H7 as well as phytopathogenic fungi A. alternata, F. oxysporum and B. cinerea. The results showed that a 5-min treatment of inoculated blueberries with electro-activated solutions resulted in a 4 log CFU/g reduction in Listeria monocytogenes for all solutions...
June 2017: Food Microbiology
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