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https://www.readbyqxmd.com/read/28209050/-active-photoprotection-sunscreens-with-dna-repair-enzymes-a-review-of-the-literature
#1
Matteo Megna, Serena Lembo, Nicola Balato, Giuseppe Monfrecola
Ultraviolet (UV) radiation exerts different harmful effects on human health, being the main etiological agents of certain skin cancers and photoaging. In this context, photoprotection, intended as a set of measures adopted to limit and prevent the effects of UV radiation, plays a critical role in avoiding undesired sunlight outcomes. Traditional sunscreens represent a widely used photoprotective approach, even if they exert a "passive photoprotection" and are not effective once damage to skin cells has been generated after sun exposure...
February 16, 2017: Giornale Italiano di Dermatologia e Venereologia: Organo Ufficiale, Società Italiana di Dermatologia e Sifilografia
https://www.readbyqxmd.com/read/28208092/microscopic-evidence-for-humic-acid-induced-changes-in-lead-immobilization-by-phosphate-in-a-counterdiffusion-system
#2
Mei Wang, Zhuo Zhang, Jie Ren, Chao Zhang, Chunping Li, Guanlin Guo, Fasheng Li
Abatement of lead (Pb) contamination in soil via chemical immobilization can reduce potential risks but is influenced by soil organic matter. The aim of this study was to observe and understand the influence of organic matter on Pb immobilization by phosphate. For this purpose, humic acid (HA) was introduced into a counterdiffusion system to mimic ionic reactions of the mineralization processes between the pollutant (Pb) and amendment agent (phosphate) in soil system, and were characterized jointly by in situ optical microscopy and ex situ XRD, SEM, TEM, and LSCM...
February 7, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28205601/virtual-human-as-a-new-diagnostic-tool-a-proof-of-concept-study-in-the-field-of-major-depressive-disorders
#3
Pierre Philip, Jean-Arthur Micoulaud-Franchi, Patricia Sagaspe, Etienne De Sevin, Jérôme Olive, Stéphanie Bioulac, Alain Sauteraud
Embodied Conversational Agents (ECAs) are promising software to communicate with patients but no study has tested them in the diagnostic field of mental disorders. The aim of this study was 1) to test the performance of a diagnostic system for major depressive disorders (MDD), based on the identification by an ECA of specific symptoms (the MDD DSM 5 criteria) in outpatients; 2) to evaluate the acceptability of such an ECA. Patients completed two clinical interviews in a randomized order (ECA versus psychiatrist) and filled in the Acceptability E-scale (AES) to quantify the acceptability of the ECA...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28199368/secondary-structure-prediction-revisited-theoretical-%C3%AE-sheet-propensity-and-coil-propensity-represent-structures-of-amyloids-and-aid-in-elucidating-phenomena-involved-in-interspecies-transmission-of-prions
#4
Yuzuru Taguchi, Noriyuki Nishida
Prions are unique infectious agents, consisting solely of abnormally-folded prion protein (PrPSc). However, they possess virus-like features, including strain diversity, the ability to adapt to new hosts and to be altered evolutionarily. Because prions lack genetic material (DNA and RNA), these biological phenomena have been attributed to the structural properties of PrPSc. Therefore, many structural models of the structure of PrPSc have been proposed based on the limited structural information available, regardless of the incompatibility with high-resolution structural analysis...
2017: PloS One
https://www.readbyqxmd.com/read/28199333/comparative-and-functional-triatomine-genomics-reveals-reductions-and-expansions-in-insecticide-resistance-related-gene-families
#5
Lucila Traverso, Andrés Lavore, Ivana Sierra, Victorio Palacio, Jesús Martinez-Barnetche, José Manuel Latorre-Estivalis, Gaston Mougabure-Cueto, Flavio Francini, Marcelo G Lorenzo, Mario Henry Rodríguez, Sheila Ons, Rolando V Rivera-Pomar
BACKGROUND: Triatomine insects are vectors of Trypanosoma cruzi, a protozoan parasite that is the causative agent of Chagas' disease. This is a neglected disease affecting approximately 8 million people in Latin America. The existence of diverse pyrethroid resistant populations of at least two species demonstrates the potential of triatomines to develop high levels of insecticide resistance. Therefore, the incorporation of strategies for resistance management is a main concern for vector control programs...
February 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28198724/engaging-learners-to-advance-medical-education
#6
Jesse Burk-Rafel, R Logan Jones, Janice L Farlow
Learners are a pillar of academic medicine, yet their voice is seldom heard in national and international scholarly conversations on medical education. However, learners are eager to contribute: in response to a recent open call from Academic Medicine, medical students and residents representing 98 institutions across 11 countries submitted 224 Letters to the Editor on wide-ranging topics. In this Invited Commentary, the authors-three medical students serving in national leadership roles-contextualize several themes discussed in these learner-authored letters...
February 14, 2017: Academic Medicine: Journal of the Association of American Medical Colleges
https://www.readbyqxmd.com/read/28195692/size-controlled-pd-nanoparticle-catalysts-prepared-by-galvanic-displacement-into-a-porous-si-iron-oxide-nanoparticle-host
#7
Taeho Kim, Xin Fu, David Warther, Michael J Sailor
Porous silicon nanoparticles containing both Pd and iron oxide nanoparticles are prepared and studied as magnetically recoverable catalysts for organic reductions. The Pd nanoparticles are generated in situ by electroless deposition of Pd(NH3)4(2+), where the porous Si skeleton acts as both a template and as a reducing agent and the released ammonia ligands raise the local pH to exert control over the size of the Pd nanoparticles. The nanocomposites are characterized by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), nitrogen adsorption, X-ray diffraction (XRD), superconducting quantum interference device (SQUID) magnetization, and dynamic light scattering (DLS)...
February 14, 2017: ACS Nano
https://www.readbyqxmd.com/read/28195158/infection-derived-lipids-elicit-an-immune-deficiency-circuit-in-arthropods
#8
Dana K Shaw, Xiaowei Wang, Lindsey J Brown, Adela S Oliva Chávez, Kathryn E Reif, Alexis A Smith, Alison J Scott, Erin E McClure, Vishant M Boradia, Holly L Hammond, Eric J Sundberg, Greg A Snyder, Lei Liu, Kathleen DePonte, Margarita Villar, Massaro W Ueti, José de la Fuente, Robert K Ernst, Utpal Pal, Erol Fikrig, Joao H F Pedra
The insect immune deficiency (IMD) pathway resembles the tumour necrosis factor receptor network in mammals and senses diaminopimelic-type peptidoglycans present in Gram-negative bacteria. Whether unidentified chemical moieties activate the IMD signalling cascade remains unknown. Here, we show that infection-derived lipids 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphoglycerol (POPG) and 1-palmitoyl-2-oleoyl diacylglycerol (PODAG) stimulate the IMD pathway of ticks. The tick IMD network protects against colonization by three distinct bacteria, that is the Lyme disease spirochete Borrelia burgdorferi and the rickettsial agents Anaplasma phagocytophilum and A...
February 14, 2017: Nature Communications
https://www.readbyqxmd.com/read/28190548/venovenous-versus-venoarterial-extracorporeal-membrane-oxygenation-for-adult-patients-with-acute-respiratory-distress-syndrome-requiring-precannulation-hemodynamic-support-a-review-of-the-elso-registry
#9
Zachary N Kon, Gregory J Bittle, Chetan Pasrija, Si M Pham, Michael A Mazzeffi, Daniel L Herr, Pablo G Sanchez, Bartley P Griffith
BACKGROUND: In addition to severe hypoxia and hypercapnia, acute respiratory distress syndrome (ARDS) can present with substantial hemodynamic compromise, requiring inotropic or vasopressor support or both. Either venovenous (VV) or venoarterial (VA) extracorporeal membrane oxygenation (ECMO) can be offered in this situation. However, a contemporary comparison of these two cannulation strategies has yet to be well described. METHODS: The Extracorporeal Life Support Organization Registry was reviewed for all cases of adult ARDS in patients that required inotropic agents or vasopressors or both before ECMO initiation (2009 to 2013)...
February 9, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28186697/complement-activated-vitronectin-enhances-the-invasion-of-non-phagocytic-cells-by-bacterial-pathogens-burkholderia-and-klebsiella
#10
Yi Han Tan, Akshamal Gamage, Yunn-Hwen Gan
Burkholderia pseudomallei is a serum-resistant Gram-negative bacterium capable of causing disseminated infections with metastatic complications. However, their interaction with non-phagocytic cells is poorly understood. We observed that exposure of B. pseudomallei and the closely related yet avirulent B. thailandensis to human plasma increased epithelial cell invasion by >20 fold. Enhanced invasion was primarily driven by a plasma factor which required a functional complement cascade, but surprisingly, was downstream of C3 mediated opsonisation...
February 10, 2017: Cellular Microbiology
https://www.readbyqxmd.com/read/28186111/stability-structural-and-functional-properties-of-a-monomeric-calcium-loaded-adenylate-cyclase-toxin-cyaa-from-bordetella-pertussis
#11
Sara E Cannella, Véronique Yvette Ntsogo Enguéné, Marilyne Davi, Christian Malosse, Ana Cristina Sotomayor Pérez, Julia Chamot-Rooke, Patrice Vachette, Dominique Durand, Daniel Ladant, Alexandre Chenal
Bordetella pertussis, the causative agent of whooping cough, secretes an adenylate cyclase toxin, CyaA, which invades eukaryotic cells and alters their physiology by cAMP overproduction. Calcium is an essential cofactor of CyaA, as it is the case for most members of the Repeat-in-ToXins (RTX) family. We show that the calcium-bound, monomeric form of CyaA, hCyaAm, conserves its permeabilization and haemolytic activities, even in a fully calcium-free environment. In contrast, hCyaAm requires sub-millimolar calcium in solution for cell invasion, indicating that free calcium in solution is involved in the CyaA toxin translocation process...
February 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28182279/ranolazine-added-to-amiodarone-facilitates-earlier-conversion-of-atrial-fibrillation-compared-to-amiodarone-only-therapy
#12
Nikos Tsanaxidis, Isaac Aidonidis, Apostolia Hatziefthimiou, Stella S Daskalopoulou, Grigorios Giamouzis, Filippos Triposkiadis, Ioannis Skoularigis
Amiodarone (AMIO) is for many years effectively used to control ventricular rate during atrial fibrillation (AF) and to convert it into sinus rhythm. However, due to its delayed onset of action, ranolazine (RAN), a new antianginal agent with atrial-selective electrophysiologic properties, has recently been attempted as add-on therapy with AMIO to facilitate AF conversion. To establish the role of this combination therapy, we enrolled 173 consecutive patients (68±10 years, 54% male) with recent-onset (< 48 h duration) AF who were eligible for pharmacologic cardioversion...
February 9, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28182166/reducing-the-risk-of-stroke-in-elderly-patients-with-non-valvular-atrial-fibrillation-a-practical-guide-for-clinicians
#13
REVIEW
Joanne M Foody
Non-valvular atrial fibrillation (NVAF) significantly contributes to the burden of stroke, particularly in elderly patients. The challenge of optimizing anticoagulation therapy is balancing efficacy and bleeding risk, especially as the same patients at high risk of stroke also tend to be at high risk of bleeding. Treating the elderly patient with NVAF presents special challenges because of their heightened risk for both stroke and bleeding. Despite clinical trial data and evidence-based guidelines, surveys indicate that physicians underuse anticoagulation in older patients for reasons that include overemphasis of bleeding risk, particularly with the increased risk of falling, at the cost of thromboembolic risk...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/28181180/managing-ibd-therapies-in-pregnancy
#14
REVIEW
Jill K J Gaidos, Sunanda V Kane
Inflammatory bowel disease is frequently diagnosed before or during key childbearing years. One of the most important factors for a healthy pregnancy is having quiescent disease prior to conception and maintaining disease remission for the duration of the pregnancy. In order to achieve that, most women will need to continue their inflammatory bowel disease (IBD) treatment during pregnancy. One of the main concerns these women have is whether these medications will have adverse effects on their growing fetus...
February 8, 2017: Current Treatment Options in Gastroenterology
https://www.readbyqxmd.com/read/28179249/penicillin-skin-testing-as-an-antimicrobial-stewardship-initiative
#15
Bruce M Jones, Christopher M Bland
PURPOSE: An initiative to determine the effects of penicillin skin testing (PST) from an antimicrobial stewardship perspective is described. SUMMARY: Penicillin allergy is one of the most frequently reported allergies; however, only about 10% of self-reports of penicillin allergy are accurate. Incorrect penicillin allergies are therefore a significant barrier to antimicrobial stewardship, with important clinical and economic implications, including increased antimicrobial resistance, an increased overall cost of care, increased length of stay, and, ultimately, increased mortality...
February 15, 2017: American Journal of Health-system Pharmacy: AJHP
https://www.readbyqxmd.com/read/28179185/the-use-of-diclofenac-sodium-in-urological-practice-a-structural-and-neurochemical-based-review
#16
REVIEW
Mahmut Ulubay, Kıymet Kübra Yurt, Arife Ahsen Kaplan, Mustafa Kemal Atilla
Diclofenac sodium (DS) is a non-steroidal anti-inflammatory drug with antipyretic and analgesic effects. It is mainly found in the form of sodium salt. The mechanism of action of DS operates by way of cyclooxygenase (COX) inhibition. The physiological effect of this substance derives from a decrease in prostaglandin production. DS is a benzeneacetic acid derivative with anti-inflammatory properties. As a non-steroidal anti-inflammatory drug (NSAID), DS binds to both forms of COX (COX-1 and COX-2) and inhibits the conversion of arachidonic acid into pro-inflammatory prostaglandins by means of chelation...
February 5, 2017: Journal of Chemical Neuroanatomy
https://www.readbyqxmd.com/read/28178882/fluorescent-imaging-with-indocyanine-green-during-laparoscopic-cholecystectomy-in-patients-at-increased-risk-of-bile-duct-injury
#17
Marjolein Ankersmit, Dieuwertje A van Dam, Anne-Sophie van Rijswijk, Baukje van den Heuvel, Jurriaan B Tuynman, Wilhelmus J H J Meijerink
BACKGROUND: Although rare, injury to the common bile duct (CBD) during laparoscopic cholecystectomy (LC) can be reduced by better intraoperative visualization of the cystic duct (CD) and CBD. The aim of this study was to establish the efficacy of early visualization of the CD and the added value of CBD identification, using near-infrared (NIR) light and the fluorescent agent indocyanine green (ICG), in patients at increased risk of bile duct injury. MATERIALS AND METHODS: Patients diagnosed with complicated cholecystitis and scheduled for LC were included...
January 1, 2017: Surgical Innovation
https://www.readbyqxmd.com/read/28178613/lasalocid-induces-cytotoxic-apoptosis-and-cytoprotective-autophagy-through-reactive-oxygen-species-in-human-prostate-cancer-pc-3-cells
#18
Kwang-Youn Kim, Sang-Hun Kim, Sun-Nyoung Yu, Sul-Gi Park, Young-Wook Kim, Hyo-Won Nam, Hyun-Hee An, Hak-Sun Yu, Young Woo Kim, Jae-Hoon Ji, Young-Kyo Seo, Soon-Cheol Ahn
Lasalocid is an antibiotic from the group of carboxylic ionophores, produced by Streptomyces lasaliensis. But there was limited information of lasalocid on human prostate cancer cells. In the present studies, to better understand its effect in human prostate cancer cells, apoptosis and autophagy associated with possible signal pathways in vitro was examined. Our study showed that lasalocid mediated cell cycle arrest in G0/G1 phase by reducing G1 phase dependent proteins, indicating entering into apoptotic cell death pathway...
February 5, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28174008/setting-characteristics-and-mechanical-properties-of-self-adhesive-resin-luting-agents
#19
Raphael Pilo, Dimitris Papadogiannis, Spiros Zinelis, George Eliades
OBJECTIVE: To evaluate the degree of conversion (DC%), salt yield and mechanical properties of self-adhesive luting agents (SAA) set under dual-cure (E) and self-cure (NE) modes. METHODS: Three SAA (GC LinkAce/GCLA, MaxCem Elite/MXEL, Rely-X Unicem 2/RXUN) and an adhesive resin luting agent (Rely-X Ultimate/RXUL-control) were used. The properties tested under E and NE modes were a) DC% and phosphate salt yield after 10min, 1h (h) and 3 weeks (w) storage, by infrared spectroscopy; and b) the mechanical properties of 3w-stored specimens by instrumented indentation testing (Martens hardness/HM, Elastic modulus/EIT, Elastic index/ηIT) and microscopic Vickers hardness/VH...
February 4, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28170224/sub-10-nm-sr2luf7-yb-er-sr2gdf7-srf2-up-conversion-nanocrystals-for-up-conversion-luminescence-magnetic-resonance-computed-tomography-trimodal-bioimaging
#20
Cailing Chen, Jianhua Liu, Ying Chen, Chunguang Li, Xiaomin Liu, He Huang, Chen Liang, Yue Lou, Zhan Shi, Shouhua Feng
Herein, sub-10 nm core-shell nanocrystals (NCs), which select Sr2LuF7:Yb/Er as core, Sr2GdF7 as middle shell, and SrF2 as an outermost shell, were synthesized by a seed-mediated growth process. The NCs possess good crystallinity, morphology, and up-conversion luminescent properties. After modification by polyethylenimine branched (PEI), in vitro cell up-conversion imaging with low autofluorescence was realized. Due to the presence of Gd(3+) ions, in vivo magnetic resonance (MR) imaging was also achieved with these designed NCs...
February 7, 2017: ACS Applied Materials & Interfaces
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