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https://www.readbyqxmd.com/read/28821986/comparative-analysis-of-the-effects-of-co2-fractional-laser-and-sonophoresis-on-human-skin-penetration-with-5-aminolevulinic-acid
#1
J H Choi, E J Shin, K H Jeong, M K Shin
Successful delivery of a photosensitizer into the skin is an important factor for effective photodynamic therapy (PDT). The effective method to increase drug penetration within short incubation time overcoming skin barrier have been investigated. This study was performed to analyze and compare the effectiveness of ablative fractional laser (FXL) pretreatment and/or sonophoresis for enhancing the penetration of 5-aminolevulinic acid (ALA) into human skin in vivo. Twenty-four identical 1 × 1 cm(2) treatment areas were mapped on the backs of ten healthy male subjects...
August 19, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28821940/videoendoscopy-worsens-swallowing-function-a-videofluoroscopic-study-a-randomized-controlled-trial
#2
Kazuo Adachi, Toshiro Umezaki, Yoshikazu Kikuchi
Aspiration pneumonia is a cause of mortality in the elderly. Evaluating swallowing function is important. Videofluoroscopy and flexible endoscopic evaluation of swallowing are comparable; however, observing all swallowing dynamics is impossible using the latter approach. We examined the significance of flexible endoscopic evaluation of swallowing using videofluoroscopy. Thirty-seven patients with dysphagia [70.0 ± 8.9 (range 49-84) years] were included. In random order, patients underwent videofluoroscopy with 10 cc contrast material, once without, and once with an endoscope inserted...
August 18, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28821439/effect-of-alcohol-on-skin-permeation-and-metabolism-of-an-ester-type-prodrug-in-yucatan-micropig-skin
#3
Makiko Fujii, Rieko Ohara, Azusa Matsumi, Kayoko Ohura, Naoya Koizumi, Teruko Imai, Yoshiteru Watanabe
We studied the effect that three alcohols, ethanol (EA), propanol (PA), and isopropanol (IPA), have on the skin permeation of p-hydroxy benzoic acid methyl ester (HBM), a model ester-type prodrug. HBM was applied to Yucatan micropig skin in a saturated phosphate buffered solution with or without 10% alcohol, and HBM and related materials in receptor fluid and skin were determined with HPLC. In the absence of alcohol, p-hydroxy benzoic acid (HBA), a metabolite of HBM, permeated the skin the most. The three alcohols enhanced the penetration of HBM at almost the same extent...
August 15, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28821057/a-cell-penetrating-peptide-mediated-chitosan-nanocarriers-for-improving-intestinal-insulin-delivery
#4
Lei Li, Liaoqing Yang, Manman Li, Liefeng Zhang
To overcome barriers for oral delivery of insulin, the chitosan(CS)-based nanocarriers with a novel cell penetrating peptide (SAR6EW) have been prepared and evaluated in this study. Characterization measurements showed that SAR6EW/CS/insulin-NPs displayed global particles with smooth surfaces and an average diameter about 150nm. The entrapment efficiency and loading rates of insulin were 75.36% and 7.58%, respectively. Insulin could be released constantly from SAR6EW/CS/insulin-NPs in vitro. Furthermore, SAR6EW/CS/insulin-NPs could facilitate the uptake of insulin and induce a significantly higher internalization of insulin via adding clathrin and caveolae mediated endocytosis...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28820935/accelerating-palladium-nanowire-h2-sensors-using-engineered-nanofiltration
#5
Won-Tae Koo, Shaopeng Qiao, Alana F Ogata, Gaurav Jha, Ji-Soo Jang, Vivian T Chen, Il-Doo Kim, Reginald M Penner
The oxygen, O2, in air interferes with the detection of H2 by palladium (Pd)-based H2 sensors, including Pd nanowires (NWs), depressing the sensitivity and retarding the response/recovery speed in air - relative to N2 or Ar. Here, we describe the preparation of H2 sensors in which a nanofiltration layer consisting of a Zn metal-organic-framework (MOF) is assembled onto Pd NWs. Polyhedron particles of Zn based zeolite imidazole framework (ZIF-8) were synthesized on lithographically patterned Pd NWs, leading to the creation of ZIF-8/Pd NWs bi-layered H2 sensors...
August 18, 2017: ACS Nano
https://www.readbyqxmd.com/read/28820665/size-matters-penis-size-and-sexual-position-in-gay-porn-profiles
#6
Joseph Brennan
This article combines qualitative and quantitative textual approaches to the representation of penis size and sexual position of performers in ten of the most visited gay pornography websites currently in operation. Specifically, in excess of 6,900 performer profiles sourced from ten commercial websites are analysed. Textual analysis of the profile descriptions is combined with a quantitative representation of disclosed penis size and sexual position, which is presented visually by two figures. The figures confirm that these sites generally market themselves as featuring penises that are extraordinarily large, and finds a sample-wide correlation between smaller penis sizes (5-6...
August 18, 2017: Journal of Homosexuality
https://www.readbyqxmd.com/read/28820528/deciphering-the-photosensitization-mechanisms-of-hypericin-towards-biological-membranes
#7
Hugo Gattuso, Marco Marazzi, François Dehez, Antonio Monari
Resorting to state-of-the art molecular modeling and simulation techniques we provide full characterization of the photophysical properties of the naturally occurring hypericin chromophore, currently used in photodynamic therapy. In particular, we reveal the different photophysical pathways leading to intersystem-crossing and hence, triplet manifold population that is necessary for the subsequent production of singlet oxygen. In particular we identify an extended region of quasi-degeneracy between the first singlet excited state and three triplet state surfaces...
August 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28820163/sympathetic-ophthalmia-related-to-conjunctival-invasive-squamous-cell-carcinoma
#8
In S Leal, David Cordeiro Sousa, Cláudia Loureiro, Ana Fonseca
Sympathetic ophthalmia (SO) is a rare, diffuse, bilateral, and granulomatous nonnecrotizing panuveitis that may follow intraocular penetrating trauma. Our aim is to report a rare case of SO following orbital exenteration. Orbital exenteration was performed on a 48-year-old african female due to conjunctival keratinizing squamous cell carcinoma with intraocular involvement of the left eye. Five days after the uneventful procedure, the patient presented signs and symptoms compatible with SO. Key differential diagnoses were excluded, and prompt and aggressive immunosuppression was started with a favourable but slow clinical response...
August 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28820156/viscoelastic-augmented-trabeculectomy-a-newer-concept
#9
Meghna Solanki, Ankur Kumar, Anubhav Upadhyay, Kishor Kumar
PURPOSE: Comparison of conventional trabeculectomy (CT) and viscoelastic-augmented trabeculectomy (VAT) in primary open-angle glaucoma. METHODS: A total of 65 primary open-angle glaucoma cases were taken for each of the two groups, i.e., CT and VAT. Viscoelastic-augmented trabeculectomy constituted lamellar scleral flap, deep scleral flap, penetrating trabeculectomy, peripheral iridectomy, filling of the anterior chamber with viscoelastic (sodium hyaluronate) and balanced salt solution, movement of visco in bleb, and tight flap closure...
August 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28820150/component-corneal-surgery-an-update
#10
REVIEW
Prafulla K Maharana, Pranita Sahay, Deepali Singhal, Itika Garg, Jeewan S Titiyal, Namrata Sharma
Several decades ago, penetrating keratoplasty was a challenge to corneal surgeons. Constant effort by the corneal surgeon to improve the outcomes as well as utilization of the available resources has led to a revolutionary change in the field of keratoplasty. All these efforts have led to the evolution of techniques that allow a corneal surgeon to disease-specific transplant of individual layers of corneal "so-called component corneal surgery" depending on the layer of cornea affected. This has led to an improvement in corneal graft survival as well as a better utilization of corneal tissues...
August 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28820071/antibody-fragments-as-potential-biopharmaceuticals-for-cancer-therapy-success-and-limitations
#11
Roman V Kholodenko, Daniel V Kalinovsky, Igor I Doronin, Eugene D Ponomarev, Irina V Kholodenko
Monoclonal antibodies (mAbs) are an important class of therapeutic agents approved for the therapy of many types of malignancies. However, in certain cases applications of conventional mAbs have several limitations in anticancer immunotherapy. These limitations include insufficient efficacy and adverse effects. The antigen-binding fragments of antibodies have a considerable potential to overcome the disadvantages of conventional mAbs, such as poor penetration into solid tumors and Fc-mediated bystander activation of the immune system...
August 17, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28819712/optical-coherence-tomography-to-differentiate-papilledema-from-pseudopapilledema
#12
REVIEW
Gema Rebolleda, Aki Kawasaki, Victoria de Juan, Noelia Oblanca, Francisco Jose Muñoz-Negrete
PURPOSE OF REVIEW: Mild papilledema may be difficult to distinguish by clinical observation from pseudopapilledema. An accurate diagnosis is critical to avoid invasive workup and unwarranted treatment. In this review, we focus on the development and subsequent role of optical coherence tomography (OCT) in detecting and differentiating optic nerve head drusen (ONHD) from papilledema and other causes of acquired swelling of the optic disc. RECENT FINDINGS: Newer OCT technologies which permit deeper penetration to improve detection of ONHD were also reviewed...
August 17, 2017: Current Neurology and Neuroscience Reports
https://www.readbyqxmd.com/read/28819052/dolphin-blubber-axial-muscle-shear-implications-for-rigid-trans-dermal-intra-muscular-tracking-tag-trauma-in-whales
#13
Michael J Moore, Alexandre N Zerbini
Whale tracking tags often penetrate semi-rigid blubber, with intramuscular sharp tips and toggling barbs under the subdermal sheath to reduce premature shedding. Tag sites can show persistent regional swellings or depressions. Fibroelastic blubber grips a tag, so if muscle shears relative to blubber during locomotion, the tag tip could cavitate the muscle within overall shearing distance. We modelled shearing of blubber relative to muscle, within the dorsal-ventral peduncular movement range of four common dolphin (Delphinus delphis) cadavers (mean length 186 cm)...
August 17, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28818775/%C3%AE-bisabolol-improves-5-aminolevulinic-acid-retention-in-buccal-tissues-potential-application-in-the-photodynamic-therapy-of-oral-cancer
#14
Nathany Prado Quintanilha, Irina Dos Santos Miranda Costa, Mônica Freiman de Souza Ramos, Nádia Campos de Oliveira Miguel, Maria Bernadete Riemma Pierre
CONTEXT: 5-Aminolevulinic acid (5-ALA) is a prodrug used in photodynamic therapy (PDT) of tumors, including cancer of the oral mucosa. 5-ALA poorly penetrates oral tissues due to its high hydrophilicity, which impairs its local effects in PDT. OBJECTIVES: To examine whether α-bisabolol (α-Bis) influences the 5-ALA permeability in the porcine buccal mucosa, to an extent that improves its application in PDT (which requires low permeation and high retention in the buccal mucosa)...
August 8, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28818315/screening-for-familial-cancer-risk-focus-on-breast-cancer
#15
REVIEW
Christine Rousset-Jablonski, Anne Gompel
A breast or an ovarian cancer occurring at a young age and/or in a family where other cases preexist suggests that those patients should be candidates for screening for mutations. Despite decades of medical research, less than 30% of cases with a suggestive personal and/or family history of hereditary breast cancer have an identified causative gene mutation. The vast majority of these cases are due to a mutation in one of the highly penetrant breast cancer genes (BRCA1, BRCA2, PTEN, TP53, CDH1, and STK11) and various guidelines direct the management of these patients...
August 7, 2017: Maturitas
https://www.readbyqxmd.com/read/28818179/multiple-trauma-and-emergency-room-management
#16
Michael Frink, Philipp Lechler, Florian Debus, Steffen Ruchholtz
BACKGROUND: The care of severely injured patients remains a challenge. Their initial treatment in the emergency room is the essential link between first aid in the field and definitive in-hospital treatment. METHODS: We present important elements of the initial in-hospital care of severely injured patients on the basis of pertinent publications retrieved by a selective search in PubMed and the current German S3 guideline on the care of severely and multiply traumatized patients, which was last updated in 2016...
July 24, 2017: Deutsches Ärzteblatt International
https://www.readbyqxmd.com/read/28818065/case-reports-of-two-pedigrees-with-recessive-arrhythmogenic-right-ventricular-cardiomyopathy-associated-with-homozygous-thr335ala-variant-in-dsg2
#17
Sami Qadri, Olli Anttonen, Juho Viikilä, Eija H Seppälä, Samuel Myllykangas, Tero-Pekka Alastalo, Miia Holmström, Tiina Heliö, Juha W Koskenvuo
BACKGROUND: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is an inherited cardiac disease, involving changes in ventricular myocardial tissue and leading to fatal arrhythmias. Mutations in desmosomal genes are thought to be the main cause of ARVC. However, the exact molecular genetic etiology of the disease still remains largely inconclusive, and this along with large variabilities in clinical manifestations complicate clinical diagnostics. CASE PRESENTATION: We report two families (n = 20) in which a desmoglein-2 (DSG2) missense variant c...
August 17, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28817934/mannose-surfaces-exhibit-self-latching-water-structuring-and-resilience-to-chaotropes-implications-for-pathogen-virulence
#18
Hashanthi K Abeyratne-Perera, Preethi L Chandran
Several viral and fungal pathogens, including HIV, SARS, Dengue, Ebola and Cryptococcus neoformans, display a preponderance of mannose residues on their surface, particularly during the infection cycle or in harsh environments. The innate immune system, on the other hand, abounds in mannose receptors which recognize mannose residues on pathogens and trigger their phagocytosis. We pose the question if there is a surface advantage for pathogens to display mannose on their surface, despite these residues being recognized by the immune system...
August 17, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28817771/ice-templated-and-cross-linked-amyloid-fibril-aerogel-scaffolds-for-cell-growth
#19
Gustav Nyström, Wye-Khay Fong, Raffaele Mezzenga
Amyloid fibrils prepared from β-lactoglobulin were used to form freeze-dried and cross-linked aerogels. By varying the fibril concentration and freezing gradient, it was possible to control the pore structure and elastic modulus of the aerogels over one order of magnitude from ~2 to ~200 kPa. Using butane tetracarboxylic acid as cross-linker these aerogels maintained their monolithic shape in aqueous conditions displaying elastic behavior and a modulus in the range of 4-40 kPa. When explored as scaffolds for cell growth, the amyloid fibril aerogels demonstrated biocompatibility and led to the successful penetration and permeation of two epithelial cell lines (Caco-2 and HT29) throughout the scaffold...
August 17, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28817744/predictors-of-corneal-perforation-or-need-for-therapeutic-keratoplasty-in-severe-fungal-keratitis-a-secondary-analysis-of-the-mycotic-ulcer-treatment-trial-ii
#20
N Venkatesh Prajna, Tiruvengada Krishnan, Revathi Rajaraman, Sushila Patel, Ranjeet Shah, Muthiah Srinivasan, Manoranjan Das, Kathryn J Ray, Catherine E Oldenburg, Stephen D McLeod, Michael E Zegans, Nisha R Acharya, Thomas M Lietman, Jennifer Rose-Nussbaumer
Importance: Identifying patients with infectious keratitis who are at risk of experiencing a poor outcome may be useful to allocate resources toward high- risk patients, particularly in resource-poor settings. Objective: To determine baseline patient and ulcer characteristics that predict a high risk of developing corneal perforation and/or the need to undergo therapeutic penetrating keratoplasty (TPK). Design, Setting, and Participants: This is a secondary analysis of Mycotic Ulcer Treatment Trial II, a multicenter, double-masked, placebo-controlled randomized clinical trial that enrolled 240 patients with smear-positive filamentous fungal corneal ulcers who enrolled between May 2010 and August 2015...
August 17, 2017: JAMA Ophthalmology
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