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https://www.readbyqxmd.com/read/28636748/e-cadherin-mediates-uvr-and-calcium-induced-melanin-transfer-in-human-skin-cells
#1
Suman K Singh, Richard Baker, Stephen K Sikkink, Carine Nizard, Sylvianne Schnebert, Robin Kurfurst, Desmond J Tobin
Skin pigmentation is directed by epidermal-melanin units, characterized by long-lived and dendritic epidermal melanocytes (MC) that interact with viable keratinocytes (KC) to contribute melanin to the epidermis. Previously we reported that MC:KC contact is required for melanosome transfer, that this can be enhanced by filopodial and by UVR/UVA irradiation, which can up-regulate melanosome transfer via Myosin X-mediated control of MC filopodia. Both MC and KC express Ca(2+) -dependent E-cadherins. These homophilic adhesion contacts induce transient increases in intra-KC Ca(2+) , while ultraviolet radiation (UVR) raises intra-MC Ca(2+) via calcium selective ORAI1 ion channels; both are associated with regulating melanogenesis...
June 21, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/28633720/evaluation-of-continuous-negative-external-pressure-cnep-for-the-treatment-of-obstructive-sleep-apnea-a-pilot-study
#2
Jerrold A Kram, Robyn V Woidtke, Kenneth B Klein, Richard M Rose
STUDY OBJECTIVES: To determine if the application of continuous negative external pressure (cNEP) is effective and safe in individuals with obstructive sleep apnea (OSA) during an overnight in-laboratory sleep study. METHODS: A prospective, open-label pilot study in subjects with documented OSA recruited from the patient population at one sleep clinic. The intervention was application and titration of cNEP during overnight polysomnography. RESULTS: Of the 15 subjects studied (mean apnea-hypopnea index [AHI] at baseline, 43...
June 16, 2017: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/28629075/fabrication-of-chitosan-au-tio2-nanotube-based-dry-electrodes-for-electroencephalography-recording
#3
Yanjuan Song, Penghai Li, Mingji Li, Hongji Li, Cuiping Li, Dazhi Sun, Baohe Yang
In this paper, we describe a method for fabricating dry electrodes for use in recording electroencephalograms (EEGs), which are based on the use of chitosan (Ch), gold (Au) particles, and titanium dioxide (TiO2) nanotube arrays deposited on titanium (Ti) thin sheets. The samples were characterized by scanning electron microscopy, X-ray diffraction, electrochemical impedance spectroscopy, and EEG signal collection. The TiO2 nanotube arrays were grown on the Ti thin sheet by an electrochemical anodic oxidation method...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28628754/the-association-between-skin-rashes-and-work-environment-personal-protective-equipment-and-hygiene-practices-among-female-farmworkers
#4
Kristina Campbell, Brenda Baker, Antonio Tovar, Eugenia Economos, Bryan Williams, Linda McCauley
The objective of this study was to assess work-related hygiene practices and the frequency and location of skin rashes due to cutaneous contact with crop-associated materials (e.g., pesticides) for female nursery and fernery workers in Central Florida. A cross-sectional, community-based participatory research study of 237 female nursery and fernery workers between the ages of 19 and 43 years with significant cutaneous contact with foliage crops was conducted using a self-report questionnaire and a skin rash chart assessment tool...
July 2017: Workplace Health & Safety
https://www.readbyqxmd.com/read/28624508/epidemiological-profile-of-cutaneous-larva-migrans-in-travelers-returning-to-france-between-2003-and-2015
#5
Doudou Sow, Ferelaha Soro, Emilie Javelle, Fabrice Simon, Philippe Parola, Philippe Gautret
BACKGROUND: Cutaneous larva migrans (CLM) is caused by the penetration and migration of canine or feline hookworm larvae into the skin, and frequently affects travelers from high-income countries returning from tropical and sub-tropical areas. Unfortunately, this pathology is neglected due to poor understanding among both physicians and travelers. This study describes the profile of cases reported in Marseille, France. PATIENTS AND METHODS: A retrospective study was performed in two specialized hospitals between 2003 and 2015...
June 15, 2017: Travel Medicine and Infectious Disease
https://www.readbyqxmd.com/read/28622369/comparative-sequence-analysis-reveals-regulation-of-genes-in-developing-schistosomula-of-schistosoma-mansoni-exposed-to-host-portal-serum
#6
Wander de Jesus Jeremias, Flávio Marcos Gomes Araújo, Fábio Ribeiro Queiroz, Fabiano Sviatopolk Mirsky Pais, Ana Carolina Alves de Mattos, Anna Christina de Matos Salim, Paulo Marcos Zech Coelho, Guilherme Correa Oliveira, John Robert Kusel, Renata Guerra-Sá, Roney Santos Coimbra, Élio Hideo Babá
Once inside a vertebrate host after infection, individual schistosomula of the parasite Schistosoma mansoni find a new and complex environment, which requires quick adjustments for survival, such as those that allow it to avoid the innate immune response of the host. Thus, it is very important for the parasite to remain within the skin after entering the host for a period of about 3 days, at which time it can then reach the venous system, migrate to the lungs and, by the end of eighth day post-infection, it reach the portal venous system, while undergoing minimal changes in morphology...
2017: PloS One
https://www.readbyqxmd.com/read/28619638/development-and-characterization-of-cuttlefish-sepia-officinalis-skin-gelatin-protein-isolate-blend-films
#7
Hela Kchaou, Mourad Jridi, Ola Abdelhedi, Benbettaïeb Nasreddine, Thomas Karbowiak, Moncef Nasri, Frédéric Debeaufort
In the present study, cuttlefish skin gelatin (CSG) and protein isolate (CSPI) blend films were prepared and their physicochemical and antioxidant properties were characterized. CSG (4%, w/v) was blended with CSPI (3%, w/v) at different ratios and 15% of glycerol (w/w, plasticizer/polymer dry matter). Results showed that increasing of CSPI content induced lower lightness but higher redness, yellowness and color difference values compared to CSG film. In addition, CSPI film had the lowest tensile strength (TS) and elongation at break (EAB) values...
June 12, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28617467/a-wet-tolerant-adhesive-patch-inspired-by-protuberances-in-suction-cups-of-octopi
#8
Sangyul Baik, Da Wan Kim, Youngjin Park, Tae-Jin Lee, Suk Ho Bhang, Changhyun Pang
Adhesion strategies that rely on mechanical interlocking or molecular attractions between surfaces can suffer when coming into contact with liquids. Thus far, artificial wet and dry adhesives have included hierarchical mushroom-shaped or porous structures that allow suction or capillarity, supramolecular structures comprising nanoparticles, and chemistry-based attractants that use various protein polyelectrolytes. However, it is challenging to develop adhesives that are simple to make and also perform well-and repeatedly-under both wet and dry conditions, while avoiding non-chemical contamination on the adhered surfaces...
June 14, 2017: Nature
https://www.readbyqxmd.com/read/28616693/-tinea-barbae-profunda-due-to-trichophyton-mentagrophytes-after-journey-to-thailand-case-report-and-review
#9
REVIEW
G Wendrock-Shiga, D Mechtel, S Uhrlaß, D Koch, C Krüger, P Nenoff
Tinea barbae represents a very rare dermatophytosis. We report on a tinea barbae profunda following a journey to Southeast Asia. After travel to Thailand, a businessman was affected by a foudroyant proceeding abscessing infection of the upper lip and beard area. The initial therapy with oral acyclovir and oral ciprofloxacin, which later was changed to ampicillin plus sulbactam, intravenously, was unsuccessful. In a biopsy sample, histologically, with Grocott-Gomori's methenamine silver stain, fungal mycelium was apparent in the tissue...
June 14, 2017: Der Hautarzt; Zeitschrift Für Dermatologie, Venerologie, und Verwandte Gebiete
https://www.readbyqxmd.com/read/28614106/positive-patch-test-reactions-to-essential-oils-in-consecutive-patients-results-from-north-america-and-central-europe
#10
Erin M Warshaw, Kathryn A Zug, Donald V Belsito, Joseph F Fowler, Joel G DeKoven, Denis Sasseville, Howard I Maibach, C G Toby Mathias, Vincent A DeLeo, James S Taylor, Anthony F Fransway, James G Marks, Melanie D Pratt, Matthew J Zirwas, Johannes Geier, Wolfgang Uter
BACKGROUND: Synthetic fragrances and natural essential oils (EOs) are used in perfumery and found in various cosmetics. Essential oils are also increasingly used to promote wellness. In previous studies, the sensitization potential of some EOs has been identified; however, the current prevalence of sensitivity is largely unknown. OBJECTIVES: The aim of this study was to determine frequency of positive patch-test reactions to EOs tested in the baseline series, along with 3 fragrance markers (FMs) (fragrance mix I, fragrance mix II, and Myroxylon pereirae), in consecutive patients in the US/Canadian North American Contact Dermatitis Group (NACDG) (2009-2014) and the central European, trinational Information Network of Departments of Dermatology (IVDK) (2010-2014)...
June 13, 2017: Dermatitis
https://www.readbyqxmd.com/read/28613147/frequent-detection-of-merkel-cell-polyomavirus-dna-in-tissues-from-10-consecutive-autopsies
#11
Giuseppe Mancuso, Jlenia Antona, Camilla Sirini, Michela Salvo, Lorenzo Giacometti, Carlotta Olivero, Elena Trisolini, Rossella Indellicato, Renzo Boldorini
Merkel cell polyomavirus (MCPyV) has been identified in samples of Merkel cell carcinoma (MCC), an aggressive skin cancer. Seroepidemiologic studies indicated a high frequency of MCPyV infection in humans, suggesting respiratory and faecal-oral routes, or transmission by skin contact. Since MCC is more frequent in immunocompromised patients, a reactivation of MCPyV latently infecting target cells has been proposed. However, neither definite ways of transmission nor specific target organs have been identified with certainty...
June 14, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28611986/scipad-effective-implementation-of-telemedicine-using-ipads-with-individuals-with-spinal-cord-injuries-a-case-series
#12
Kazuko Shem, Samantha J Sechrist, Eleanor Loomis, Linda Isaac
BACKGROUND: Individuals with spinal cord injury (SCI) must often travel long distances to see a rehabilitation specialist. While telemedicine (TM) for pressure ulcer management has been used in this population, real-time video telecommunication using iPad has never been described. OBJECTIVE: The objective of this study was to provide specialized care for persons with SCI through TM consultation expediently in order to address medical needs, manage secondary complications, and to improve quality of life (QoL) of individuals with SCI...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28610688/efficacy-of-patient-specific-bolus-created-using-three-dimensional-printing-technique-in-photon-radiotherapy
#13
Koya Fujimoto, Takehiro Shiinoki, Yuki Yuasa, Hideki Hanazawa, Keiko Shibuya
PURPOSE: A commercially available bolus ("commercial-bolus") does not make complete contact with the irregularly shaped patient skin. This study aims to customise a patient-specific three-dimensional (3D) bolus using a 3D printing technique ("3D-bolus") and to evaluate its clinical feasibility for photon radiotherapy. METHODS: The 3D-bolus was designed using a treatment planning system (TPS) in Digital Imaging and Communications in Medicine-Radiotherapy (DICOM-RT) format, and converted to stereolithographic format for printing...
June 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28610551/passive-cooling-of-cutaneous-and-subcutaneous-tissues-using-phase-changing-materials-feasibility-study-using-a-numerical-model
#14
Ricardo Romero-Méndez, Francisco G Pérez-Gutiérrez, Joseph J Musacchia, Walfre Franco
In many dermatological applications, lowering the temperature of skin and maintaining specific temperatures for extended periods of time are fundamental requirements for treatment; for example, in targeting adipose tissue and managing cutaneous pain. In this work we investigate the feasibility of using phase changing materials (PCMs) as an alternative passive, open-loop, heat extraction method for cooling cutaneous and subcutaneous tissues. We used a finite difference parametric approach to model the spatial and temporal progression of the heat transferred from the skin to a PCM in contact with the skin surface...
June 13, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28610207/-i-microlepidogaster-i-i-negomata-i-a-new-hypoptopomatine-catfish-loricariidae-hypoptopomatinae-from-rio-s%C3%A3-o-francisco-basin-southeastern-brazil
#15
Fernanda O Martins, Arieli M Cherobim, Breno N Andrade, Francisco Langeani
The number of species of Microlepidogaster recently increased considerably, the genus presently comprises six species distributed in the Paraná, São Francisco, and Jequitinhonha river basins. A new species of Microlepidogaster is herein described from the upper Rio São Francisco basin, which can be distinguished from all congeners by having two exclusive features within the genus: skin over swimbladder opening with two to five reduced unperforated platelets, and ventral laminar expansion of coracoid enclosing completely or almost completely the arrector fossa of the pectoral girdle...
June 11, 2017: Zootaxa
https://www.readbyqxmd.com/read/28609304/suprameatal-cochlear-implantation-in-a-charge-patient-with-a-novel-chd7-variant-and-kallmann-syndrome-phenotype-a-case-report
#16
Akira Ganaha, Tetsuya Tono, Tadashi Kaname, Kumiko Yanagi, Teruyuki Higa, Shunsuke Kondo, Hiroyuki Maeda, Mikio Suzuki
OBJECTIVE: We present the clinical findings, technique of the suprameatal cochlear implantation, postoperative auditory results, and genetic analysis of the CHD7 gene. PATIENT: A 19-year-old Japanese woman was referred because of progressive hearing loss since early childhood. She had used verbal language for the main mode of communication until the age of 17. Examination revealed coloboma, heart defect, choanal atresia, genital hypoplasia, and deafness, which was diagnosed as CHARGE syndrome...
June 12, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28608297/neomycin-polymyxin-b-and-dexamethasone-allergic-reactions-following-periocular-surgery
#17
Nicholas A Moore, Craig N Czyz, Tracy D Carter, Jill A Foster, Kenneth V Cahill
BACKGROUND: The aim of this study was to evaluate the rate of periocular allergic skin reactions to topical neomycin, polymyxin B, and dexamethasone (NPD) ophthalmic ointment. METHODS: A consecutive patient prospective study was performed. A total of 522 patients who had a procedure involving incision of the periocular skin with subsequent postoperative application of NPD ophthalmic ointment were included. Patients were evaluated for signs of allergy at 1 week postoperatively or prior if the patient had complaints...
December 2017: Journal of Ophthalmic Inflammation and Infection
https://www.readbyqxmd.com/read/28604061/evaluating-the-effects-of-bedding-materials-and-elevated-platforms-on-contact-dermatitis-and-plumage-cleanliness-of-commercial-broilers-and-on-litter-condition-in-broiler-houses
#18
E Kaukonen, M Norring, A Valros
1. Experiment 1, comparing wood shavings and ground straw bedding with peat, was performed on 7 broiler farms over two consecutive batches during the winter season. Experiment 2, assessing the effect of elevated (30 cm) platforms, was conducted in three farms replicated with 6 consecutive batches. 2. Footpad lesions were inspected at slaughter following the Welfare Quality® (WQ) assessment and official programme. Hock lesions, plumage cleanliness and litter condition were assessed using the WQ-assessment. Litter height, pH, moisture and ammonia were determined...
June 12, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28602801/raman-imaging-of-cellular-uptake-and-studies-of-silver-nanoparticles-effect-in-bj-human-fibroblasts-cell-lines
#19
Monika Perlovska Harvanova, Jana Jiravova, Jakub Malohlava, Katerina Barton Tomankova, Dagmar Jirova, Hana Kolarova
Silver nanoparticles (AgNPs) have been widely studied for their beneficial antimicrobial effect and have been considered by some to be a safe ingredient, as penetration of metal nanoparticles through the skin in vivo has not been proven. However, AgNPs are becoming a commonly applied nanomaterial for surface modifications of medical products which come into contact with damaged skin. In our experiments, we tested two commercially available AgNPs samples manufactured by electrolysis. AFM was used to characterize tested AgNPs morphology and their mean particle size which was assessed as 30...
June 7, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28601759/cell-compatible-conducting-polyaniline-films-prepared-in-colloidal-dispersion-mode
#20
Věra Kašpárková, Petr Humpolíček, Zdenka Capáková, Patrycja Bober, Jaroslav Stejskal, Miroslava Trchová, Petra Rejmontová, Ita Junkar, Marián Lehocký, Miran Mozetič
Conducting polyaniline can be prepared and modified using several procedures, all of which can significantly influence its applicability in different fields of biomedicine or biotechnology. The modifications of surface properties are crucial with respect to the possible applications of this polymer in tissue engineering or as biosensors. Innovative technique for preparing polyaniline films via in-situ polymerization in colloidal dispersion mode using four stabilizers (poly-N-vinylpyrrolidone; sodium dodecylsulfate; Tween 20 and Pluronic F108) was developed...
May 31, 2017: Colloids and Surfaces. B, Biointerfaces
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