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https://www.readbyqxmd.com/read/29350451/morphological-specializations-of-the-epidermis-of-an-angler-catfish-chaca-chaca-siluriformes-chacidae-in-relation-to-its-ecological-niche-a-scanning-electron-microscopic-investigation
#1
Arup Mistri, Usha Kumari, Swati Mittal, Ajay Kumar Mittal
The present work was undertaken with the aim to deduce morphological adaptations in skin of an angler catfish Chaca chaca by means of scanning electron microscopy. The fish is nocturnal, bottom dwelling, sluggish, ambush predator, lives in sand, mud, or soft substrates often buried and camouflaged for protection and to feed. The surface of the epidermis is covered with polygonal epithelial cells, each having surface relief of microridges forming intricate patterns. In between epithelial cells irregularly distributed mucous cell openings, randomly distributed epidermal specialized structures, taste buds, and neuromasts are discernible...
January 19, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29350193/layer-structured-bismuth-selenides-bi2se3-and-bi3se4-for-high-energy-and-flexible-all-solid-state-micro-supercapacitors
#2
Chunxue Hao, Lidan Wang, Fusheng Wen, Jianyong Xiang, Lei Li, Wentao Hu, Zhongyuan Liu
In this work, bismuth selenides (Bi2Se3 and Bi3Se4), both of which have a layered rhombohedral crystal structure, have been found to be useful as electrode materials for supercapacitor applications. In a liquid electrolyte system (6M KOH), Bi2Se3 nanoplates exhibit much better performance as an electrode material than Bi3Se4 nanoparticles do, delivering a higher specific capacitance (272.9 F g-1) than that of Bi3Se4 (193.6 F g-1) at 5 mV s-1. This result may be attributed to the fact that Bi2Se3 nanoplates possess more active electrochemical surfaces for the reversible surface redox reactions owing to their planar quintuple stacked layers (septuple layers for Bi3Se4)...
January 19, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29349851/clinical-and-molecular-implications-of-structural-changes-to-desmosomes-and-corneodesmosomes
#3
REVIEW
Akemi Ishida-Yamamoto, Satomi Igawa, Mari Kishibe, Masaru Honma
Desmosomes provide the main intercellular adhesive properties between epidermal keratinocytes. Their distribution becomes uneven in severe dermatitis, multiple allergies and metabolic wasting syndrome due to desmoglein 1 deficiency and the loss of intercellular adhesion or acantholysis. When keratinocytes differentiate from granular cells into cornified cells, desmosomes are transformed into corneodesmosomes and can provide stronger intercellular adhesion. Degradation of corneodesmosomes is a tightly regulated process involving a number of proteases and their inhibitors...
January 19, 2018: Journal of Dermatology
https://www.readbyqxmd.com/read/29347402/stable-lattice-boltzmann-model-for-maxwell-equations-in-media
#4
A Hauser, J L Verhey
The present work shows a method for stable simulations via the lattice Boltzmann (LB) model for electromagnetic waves (EM) transiting homogeneous media. LB models for such media were already presented in the literature, but they suffer from numerical instability when the media transitions are sharp. We use one of these models in the limit of pure vacuum derived from Liu and Yan [Appl. Math. MODEL: 38, 1710 (2014)AMMODL0307-904X10.1016/j.apm.2013.09.009] and apply an extension that treats the effects of polarization and magnetization separately...
December 2017: Physical Review. E
https://www.readbyqxmd.com/read/29346445/transcriptome-analysis-of-skin-fibroblasts-with-dominant-negative-col3a1-mutations-provides-molecular-insights-into-the-etiopathology-of-vascular-ehlers-danlos-syndrome
#5
Nicola Chiarelli, Giulia Carini, Nicoletta Zoppi, Marco Ritelli, Marina Colombi
Vascular Ehlers-Danlos syndrome (vEDS) is a dominantly inherited connective tissue disorder caused by mutations in the COL3A1 gene that encodes type III collagen (COLLIII), which is the major expressed collagen in blood vessels and hollow organs. The majority of disease-causing variants in COL3A1 are glycine substitutions and in-frame splice mutations in the triple helix domain that through a dominant negative effect are associated with the severe clinical spectrum potentially lethal of vEDS, characterized by fragility of soft connective tissues with arterial and organ ruptures...
2018: PloS One
https://www.readbyqxmd.com/read/29345473/highly-sensitive-and-ultrastable-skin-sensors-for-biopressure-and-bioforce-measurements-based-on-hierarchical-microstructures
#6
Qi-Jun Sun, Jiaqing Zhuang, Shishir Venkatesh, Ye Zhou, Su-Ting Han, Wei Wu, Ka-Wai Kong, Wen-Jung Li, Xianfeng Chen, Robert K Y Li, Vellaisamy A L Roy
Piezoresistive microsensors are considered to be essential components of the future wearable electronic devices. However, the expensive cost, complex fabrication technology, poor stability, and low yield have limited their developments for practical applications. Here, we present a cost-effective, relatively simple, and high-yield fabrication approach to construct highly sensitive and ultrastable piezoresistive sensors using a bioinspired hierarchically structured graphite/polydimethylsiloxane composite as the active layer...
January 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29344315/a-topical-anti-inflammatory-healing-regimen-utilizing-conjugated-linolenic-acid-for-use-post-ablative-laser-resurfacing-of-the-face-a-randomized-controlled-trial
#7
Douglas C Wu, Mitchel P Goldman
Background: Fractionated, ablative lasers are usually associated with post-treatment erythema, edema, and crusting, which can last from 5 to 14 days. Conjugated linolenic acid, an omega-5 fatty acid, has significant antioxidant and anti-inflammatory properties, and has been shown to stimulate keratinocyte proliferation and epidermal regeneration. By modulating the early inflammatory milieu and directly affecting skin structure and function, conjugated linolenic acid might therefore shorten downtime following fractionated ablative laser resurfacing of the face...
October 2017: Journal of Clinical and Aesthetic Dermatology
https://www.readbyqxmd.com/read/29343655/spatiotemporal-alterations-of-autophagy-marker-lc3-in-rat-skin-fibroblasts-during-wound-healing-process
#8
Emiko Asai, Masaya Yamamoto, Kazuki Ueda, Satoshi Waguri
To investigate the possible implications of autophagy, one of the degradation pathways induced by metabolic stress, in the dynamic reconstructive process of wound healing, the appearance and changes of punctate structures for microtubule-associated protein 1 light chain 3 (LC3), an autophagosome marker, were examined in a rat skin wound healing model. Although the ratio of LC3-II/LC3-I in Western blotting was not evidently changed during the wound healing process, LC3-positive dots were clearly observed in fibroblasts and myofibroblasts, and occasionally in macrophages, by immunohistofluorescence microscopy...
January 16, 2018: Fukushima Journal of Medical Science
https://www.readbyqxmd.com/read/29343644/identification-of-genes-required-for-mycobacterium-abscessus-growth-in-vivo-with-a-prominent-role-of-the-esx-4-locus
#9
Laura Laencina, Violaine Dubois, Vincent Le Moigne, Albertus Viljoen, Laleh Majlessi, Justin Pritchard, Audrey Bernut, Laura Piel, Anne-Laure Roux, Jean-Louis Gaillard, Bérengère Lombard, Damarys Loew, Eric J Rubin, Roland Brosch, Laurent Kremer, Jean-Louis Herrmann, Fabienne Girard-Misguich
Mycobacterium abscessus, a rapidly growing mycobacterium (RGM) and an opportunistic human pathogen, is responsible for a wide spectrum of clinical manifestations ranging from pulmonary to skin and soft tissue infections. This intracellular organism can resist the bactericidal defense mechanisms of amoebae and macrophages, an ability that has not been observed in other RGM. M. abscessus can up-regulate several virulence factors during transient infection of amoebae, thereby becoming more virulent in subsequent respiratory infections in mice...
January 17, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29343574/novel-human-polyomavirus-non-coding-control-regions-differ-in-bi-directional-gene-expression-according-to-host-cell-large-t-antigen-expression-and-clinically-occurring-rearrangements
#10
Elvis T Ajuh, Zongsong Wu, Emma Kraus, Fabian H Weissbach, Tobias Bethge, Rainer Gosert, Nicole Fischer, Hans H Hirsch
Human polyomavirus (HPyV) DNA genomes contain three regions denoted early viral gene region (EVGR) encoding the regulatory T-antigens and one microRNA, late viral gene region (LVGR) encoding the structural Vp capsid proteins, and non-coding control region (NCCR). The NCCR harbours the origin of viral genome replication and bi-directional promoter/enhancer functions governing EVGR- and LVGR-expression on opposite DNA strands. Despite principle similarities, HPyV-NCCRs differ in length, sequence, and architecture...
January 17, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29342966/fabrication-of-a-textile-based-wearable-blood-leakage-sensor-using-screen-offset-printing
#11
Ken-Ichi Nomura, Yoshinori Horii, Shusuke Kanazawa, Yasuyuki Kusaka, Hirobumi Ushijima
We fabricate a wearable blood leakage sensor on a cotton textile by combining two newly developed techniques. First, we employ a screen-offset printing technique that avoids blurring, short circuiting between adjacent conductive patterns, and electrode fracturing to form an interdigitated electrode structure for the sensor on a textile. Furthermore, we develop a scheme to distinguish blood from other substances by utilizing the specific dielectric dispersion of blood observed in the sub-megahertz frequency range...
January 15, 2018: Sensors
https://www.readbyqxmd.com/read/29342918/abnormal-sphingolipid-world-in-inflammation-specific-for-lysosomal-storage-diseases-and-skin-disorders
#12
REVIEW
Marta Moskot, Katarzyna Bocheńska, Joanna Jakóbkiewicz-Banecka, Bogdan Banecki, Magdalena Gabig-Cimińska
Research in recent years has shown that sphingolipids are essential signalling molecules for the proper biological and structural functioning of cells. Long-term studies on the metabolism of sphingolipids have provided evidence for their role in the pathogenesis of a number of diseases. As many inflammatory diseases, such as lysosomal storage disorders and some dermatologic diseases, including psoriasis, atopic dermatitis and ichthyoses, are associated with the altered composition and metabolism of sphingolipids, more studies precisely determining the responsibilities of these compounds for disease states are required to develop novel pharmacological treatment opportunities...
January 15, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29342895/optimization-of-extraction-conditions-and-characterization-of-pepsin-solubilised-collagen-from-skin-of-giant-croaker-nibea-japonica
#13
Fangmiao Yu, Chuhong Zong, Shujie Jin, Jiawen Zheng, Nan Chen, Ju Huang, Yan Chen, Fangfang Huang, Zuisu Yang, Yunping Tang, Guofang Ding
In the present study, response surface methodology was performed to investigate the effects of extraction parameters on pepsin-solubilised collagen (PSC) from the skin of the giant croaker Nibea japonica. The optimum extraction conditions of PSC were as follows: concentration of pepsin was 1389 U/g, solid-liquid ratio was 1:57 and hydrolysis time was 8.67 h. Under these conditions, the extraction yield of PSC was up to 84.85%, which is well agreement with the predict value of 85.03%. The PSC from Nibea japonica skin was then characterized as type I collagen by using sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE)...
January 14, 2018: Marine Drugs
https://www.readbyqxmd.com/read/29342499/efficacy-and-safety-of-cyclophosphamide-treatment-in-severe-juvenile-dermatomyositis-shown-by-marginal-structural-modelling
#14
Claire T Deakin, Raquel Campanilho-Marques, Stefania Simou, Elena Moraitis, Lucy R Wedderburn, Eleanor Pullenayegum, Clarissa A Pilkington
OBJECTIVE: In patients with severe or refractory juvenile dermatomyositis (JDM), second-line treatments may be required. Cyclophosphamide (CYC) is used to treat some connective tissue diseases, but evidence of efficacy in JDM is limited. This study aimed to describe clinical improvement in JDM patients treated with CYC and model efficacy of CYC compared to patients not treated with CYC. METHODS: Clinical data on skin, global and muscle disease were analyzed from patients recruited to the Juvenile Dermatomyositis Cohort and Biomarker Study...
January 17, 2018: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29341138/model-fitting-for-small-skin-permeability-data-sets-hyperparameter-optimisation-in-gaussian-process-regression
#15
Parivash Ashrafi, Yi Sun, Neil Davey, Roderick G Adams, Simon C Wilkinson, Gary Patrick Moss
OBJECTIVES: The aim of this study was to investigate how to improve predictions from Gaussian Process models by optimising the model hyperparameters. METHODS: Optimisation methods, including Grid Search, Conjugate Gradient, Random Search, Evolutionary Algorithm and Hyper-prior, were evaluated and applied to previously published data. Data sets were also altered in a structured manner to reduce their size, which retained the range, or 'chemical space' of the key descriptors to assess the effect of the data range on model quality...
January 17, 2018: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/29340060/assessment-of-antimicrobial-and-wound-healing-effects-of-brevinin-2ta-against-the-bacterium-klebsiella-pneumoniae-in-dermally-wounded-rats
#16
Siqin Liu, Qilin Long, Yang Xu, Jun Wang, Zhongwei Xu, Lei Wang, Mei Zhou, Yuxin Wu, Tianbao Chen, Chris Shaw
Antimicrobial peptides (AMPs) are regarded as promising alternatives for antibiotics due to their inherent capacity to prevent microbial drug resistance. Amphibians are rich source of bioactive molecules, which provide numerous AMPs with various structures as drug candidates. Here, we isolated and identified a novel AMP Brevinin-2Ta (B-2Ta) from the skin secretion of the European frog, Pelophylax kl. esculentus. In vitro studies revealed that it showed broad antimicrobial activities against S. aureus, E. coli and C...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29339793/skin-inspired-highly-stretchable-and-conformable-matrix-networks-for-multifunctional-sensing
#17
Qilin Hua, Junlu Sun, Haitao Liu, Rongrong Bao, Ruomeng Yu, Junyi Zhai, Caofeng Pan, Zhong Lin Wang
Mechanosensation electronics (or Electronic skin, e-skin) consists of mechanically flexible and stretchable sensor networks that can detect and quantify various stimuli to mimic the human somatosensory system, with the sensations of touch, heat/cold, and pain in skin through various sensory receptors and neural pathways. Here we present a skin-inspired highly stretchable and conformable matrix network (SCMN) that successfully expands the e-skin sensing functionality including but not limited to temperature, in-plane strain, humidity, light, magnetic field, pressure, and proximity...
January 16, 2018: Nature Communications
https://www.readbyqxmd.com/read/29339718/injury-activated-glial-cells-promote-wound-healing-of-the-adult-skin-in-mice
#18
Vadims Parfejevs, Julien Debbache, Olga Shakhova, Simon M Schaefer, Mareen Glausch, Michael Wegner, Ueli Suter, Una Riekstina, Sabine Werner, Lukas Sommer
Cutaneous wound healing is a complex process that aims to re-establish the original structure of the skin and its functions. Among other disorders, peripheral neuropathies are known to severely impair wound healing capabilities of the skin, revealing the importance of skin innervation for proper repair. Here, we report that peripheral glia are crucially involved in this process. Using a mouse model of wound healing, combined with in vivo fate mapping, we show that injury activates peripheral glia by promoting de-differentiation, cell-cycle re-entry and dissemination of the cells into the wound bed...
January 16, 2018: Nature Communications
https://www.readbyqxmd.com/read/29338973/asthma-copd-overlap-a-portuguese-survey
#19
E Padrão, D Araújo, A Todo Bom, C Robalo Cordeiro, J Correia de Sousa, J Cardoso, M Morais-Almeida, R Costa, F Pavão, R B Leite, A Marques
INTRODUCTION: The overlap between asthma and chronic obstructive pulmonary disease (COPD) (ACO) has been discussed for many years but clinical recommendations for this entity have been diverse. This study is intended to reach a consensus on diagnosis, treatment and patient orientation for ACO, within the Portuguese medical community. METHODS: This study was conducted by a multidisciplinary panel of experts from three distinct medical specialties (Pulmonology, Family Medicine and Immunoallergology)...
January 12, 2018: Revista Portuguesa de Pneumologia
https://www.readbyqxmd.com/read/29338773/chemokine-ligand-receptor-interactions-critically-regulate-cutaneous-wound-healing
#20
Erich Bünemann, Norman-Philipp Hoff, Bettina Alexandra Buhren, Ulrike Wiesner, Stephan Meller, Edwin Bölke, Anja Müller-Homey, Robert Kubitza, Thomas Ruzicka, Albert Zlotnik, Bernhard Homey, Peter Arne Gerber
BACKGROUND: Wound healing represents a dynamic process involving directional migration of different cell types. Chemokines, a family of chemoattractive proteins, have been suggested to be key players in cell-to-cell communication and essential for directed migration of structural cells. Today, the role of the chemokine network in cutaneous wound healing is not fully understood. Unraveling the chemokine-driven communication pathways in this complex process could possibly lead to new therapeutic strategies in wound healing disorders...
January 16, 2018: European Journal of Medical Research
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