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https://www.readbyqxmd.com/read/28222523/anomalous-white-matter-structure-and-the-effect-of-age-in-down-syndrome-patients
#1
Raquel Fenoll, Jesus Pujol, Susanna Esteba-Castillo, Susana de Sola, Núria Ribas-Vidal, Javier García-Alba, Gonzalo Sánchez-Benavides, Gerard Martínez-Vilavella, Joan Deus, Mara Dierssen, Ramón Novell-Alsina, Rafael de la Torre
BACKGROUND: Neural tissue alterations in Down syndrome are fully expressed at relatively late developmental stages. In addition, there is an early presence of neurodegenerative changes in the late life stages. OBJECTIVE: The aims of this study were both to characterize white matter abnormalities in the brain of adult Down syndrome patients using diffusion tensor imaging (DTI) and to investigate whether degenerative alterations in white matter structure are detectable before dementia is clinically evident...
February 7, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28221152/-percutaneous-nephrolithotomy-pcnl-conditions-for-a-safe-performance
#2
Paúl Antonio Escovar Díaz, Paúl Ernesto Escovar La Riva, Fernando Paúl Rodríguez Escovar, María Elvira Escovar López, María Ximena Escovar López, Mario Ramón Campins Arias, Alejandro Franco
OBJECTIVE: To describe the PCNL technique addressing those conditions that enable us to perform the procedure with maximum patient's safety without losing focus on the objective of lithiasis resolution. METHODS: Based on our experience, accumulated with time, and the constant update of the endourological techniques we treat those issues in relation to PCNL from the efficiency, efficacy and effectiveness perspective. To consider them involves the successful performance of the technique, with complications prevention and taking cost-efficiency into account...
January 2017: Archivos Españoles de Urología
https://www.readbyqxmd.com/read/28221149/technique-minimal-requirements-and-fragmentation-strategies-in-rirs
#3
Juan Ramón Cansino Alcaide, Alejandra Portilla Eastmond
Flexible ureteroscopy is a highly resolving surgery which is able to solve most renal lithiasis of any Urology Department, with very low economic impact. It is a technique that has helped to continue treatment when SWL couldn't, and also has reduced the number of percutaneous renal surgeries that we currently perform. In this paper, we try review three important features of the operation: Technique, minimal requirements that we need to perform this surgery in a Urology Department, and the different possibilities to treat the lithiasis with holmium laser...
January 2017: Archivos Españoles de Urología
https://www.readbyqxmd.com/read/28220973/enzyme-controlled-nanodevice-for-acetylcholine-triggered-cargo-delivery-based-on-janus-au-mesoporous-silica-nanoparticles
#4
Antoni Llopis-Lorente, Paula Diez, Cristina de la Torre, Alfredo Sanchez, Felix Sancenon, Elena Aznar, Maria D Marcos, Paloma Martínez-Ruíz, Ramón Martínez-Máñez, Reynaldo Villalonga
This work reports a new gated nanodevice for acetylcholine-triggered cargo delivery. We prepared and characterized Janus Au-mesoporous silica nanoparticles functionalized with acetylcholinesterase on the Au face and with supramolecular β-cyclodextrin:benzimidazole inclusion complexes as caps on the mesoporous silica face. The nanodevice is able to selectively deliver the cargo in the presence of acetylcholine via enzyme-mediated acetylcholine hydrolysis, locally lowering the pH and opening the supramolecular gate...
February 21, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28220900/membrane-cholesterol-access-into-a-g-protein-coupled-receptor
#5
Ramon Guixà-González, José L Albasanz, Ismael Rodriguez-Espigares, Manuel Pastor, Ferran Sanz, Maria Martí-Solano, Moutusi Manna, Hector Martinez-Seara, Peter W Hildebrand, Mairena Martín, Jana Selent
Cholesterol is a key component of cell membranes with a proven modulatory role on the function and ligand-binding properties of G-protein-coupled receptors (GPCRs). Crystal structures of prototypical GPCRs such as the adenosine A2A receptor (A2AR) have confirmed that cholesterol finds stable binding sites at the receptor surface suggesting an allosteric role of this lipid. Here we combine experimental and computational approaches to show that cholesterol can spontaneously enter the A2AR-binding pocket from the membrane milieu using the same portal gate previously suggested for opsin ligands...
February 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28220694/selective-fluorogenic-sensing-of-as-iii-using-aptamer-capped-nanomaterials
#6
Mar Oroval, Carmen Coll, Andrea Bernardos, María Dolores Marcos, Ramon Martinez-Manez, Dmitry G Shchukin, Felix Sancenón
Organic-inorganic hybrid nanomaterials offer extremely valuable tools for monitoring many types of analytes in in solution. Within this framework, aptamer-based nanomaterials for heavy metal detection are still very scarce. Herein, a novel sensing nanoprobe for the selective and sensitive detection of As(III) based on the combination of aptamers with mesoporous silica nanoparticles has been developed. The efficiency of the sensor is demonstrated in environmental conditions, showing a great potential in As(III) monitoring assays...
February 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28220000/suppression-of-scattering-for-small-dielectric-particles-anapole-mode-and-invisibility
#7
Boris Luk'yanchuk, Ramón Paniagua-Domínguez, Arseniy I Kuznetsov, Andrey E Miroshnichenko, Yuri S Kivshar
We reveal that an isotropic, homogeneous, subwavelength particle with high refractive index can produce ultra-small total scattering. This effect, which follows from the inhibition of the electric dipole radiation, can be identified as a Fano resonance in the scattering efficiency and is associated with the excitation of an anapole mode in the particle. This anapole mode is non-radiative and emerges from the destructive interference of electric and toroidal dipoles. The invisibility effect could be useful for the design of highly transparent optical materials...
March 28, 2017: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28219044/understanding-the-self-management-skills-of-persons-with-epilepsy
#8
Ramon Edmundo D Bautista
PURPOSE: To determine whether the self-management skills of persons with epilepsy (PWE) vary across the different domains of the Epilepsy Self-Management Scale (ESMS). METHODS: 172 PWE completed a survey questionnaire as well as the ESMS. RESULTS: Using ANOVA with pairwise comparison, the mean item scores of the medication, seizure, and safety management subscales of the ESMS were significantly higher than the lifestyle and information management subscales (p<0...
February 17, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28218395/coffee-tea-and-melanoma-risk-findings-from-the-european-prospective-investigation-into-cancer-and-nutrition
#9
Saverio Caini, Giovanna Masala, Calogero Saieva, Marina Kvaskoff, Isabelle Savoye, Carlotta Sacerdote, Oskar Hemmingsson, Bodil Hammer Bech, Kim Overvad, Anne Tjønneland, Kristina E N Petersen, Francesca Romana Mancini, Marie-Christine Boutron-Ruault, Iris Cervenka, Rudolf Kaaks, Tilman Kühn, Heiner Boeing, Anna Floegel, Antonia Trichopoulou, Elisavet Valanou, Maria Kritikou, Giovanna Tagliabue, Salvatore Panico, Rosario Tumino, H Bas Bueno-de-Mesquita, Petra H Peeters, Marit B Veierød, Reza Ghiasvand, Marko Lukic, José Ramón Quirós, Maria-Dolores Chirlaque, Eva Ardanaz, Elena Salamanca Fernández, Nerea Larrañaga, Raul Zamora-Ros, Lena Maria Nilsson, Ingrid Ljuslinder, Karin Jirström, Emily Sonestedt, Timothy J Key, Nick Wareham, Kay-Tee Khaw, Marc Gunter, Inge Huybrechts, Neil Murphy, Konstantinos K Tsilidis, Elisabete Weiderpass, Domenico Palli
In vitro and animal studies suggest that bioactive constituents of coffee and tea may have anticarcinogenic effects against cutaneous melanoma, however epidemiological evidence is limited to date. We examined the relationships between coffee (total, caffeinated or decaffeinated) and tea consumption and risk of melanoma in the European Prospective Investigation into Cancer and Nutrition (EPIC). EPIC is a multi-centre prospective study that enrolled over 500,000 participants aged 25-70 years from ten European countries in 1992-2000...
February 20, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28218058/novel-approaches-for-diagnosing-inherited-platelet-disorders
#10
REVIEW
José María Bastida Bermejo, Jesús María Hernández-Rivas, José Ramón González-Porras
Inherited platelet disorders diagnosis is based on the clinical history and bleeding assessment tools. The laboratory functional assays as well as the molecular test to identify the pathogenic genetic variant are essential to confirm the accurate diagnosis of these disorders. Nowadays, the main challenges to developing a new diagnostic system are involved in reducing the samples' volume, and faster and more helpful analysis. Moreover, there are no widely available and standardised global tests. High throughput genetic testing such as next-generation sequencing has revolutionised DNA sequencing technologies as it allows the simultaneous and faster investigation of multiple genes at a manageable cost...
January 20, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/28217110/intra-species-and-inter-kingdom-signaling-of-legionella-pneumophila
#11
REVIEW
Ramon Hochstrasser, Hubert Hilbi
The ubiquitous Gram-negative bacterium Legionella pneumophila parasitizes environ mental amoebae and, upon inhalation, replicates in alveolar macrophages, thus causing a life-threatening pneumonia called "Legionnaires' disease." The opportunistic pathogen employs a bi-phasic life cycle, alternating between a replicative, non-virulent phase and a stationary, transmissive/virulent phase. L. pneumophila employs the Lqs (Legionella quorum sensing) system as a major regulator of the growth phase switch. The Lqs system comprises the autoinducer synthase LqsA, the homologous sensor kinases LqsS and LqsT, as well as a prototypic response regulator termed LqsR...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28215921/role-of-myocardial-collagen-in-severe-aortic-stenosis-with-preserved-ejection-fraction-and-symptoms-of-heart-failure
#12
Kattalin Echegaray, Ion Andreu, Ane Lazkano, Iñaki Villanueva, Alberto Sáenz, María Reyes Elizalde, Tomás Echeverría, Begoña López, Asier Garro, Arantxa González, Elena Zubillaga, Itziar Solla, Iñaki Sanz, Jesús González, Alberto Elósegui-Artola, Pere Roca-Cusachs, Javier Díez, Susana Ravassa, Ramón Querejeta
INTRODUCTION AND OBJECTIVES: We investigated the anatomical localization, biomechanical properties, and molecular phenotype of myocardial collagen tissue in 40 patients with severe aortic stenosis with preserved ejection fraction and symptoms of heart failure. METHODS: Two transmural biopsies were taken from the left ventricular free wall. Mysial and nonmysial regions of the collagen network were analyzed. Myocardial collagen volume fraction (CVF) was measured by picrosirius red staining...
February 16, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/28215445/observational-study-of-chondrodermatitis-nodularis-helicis-treated-with-methyl-aminolevulinate-photodynamic-therapy
#13
Ana Julia García-Malinis, Lucia Turrión-Merino, Bibiana Pérez-García, David Saceda-Corralo, Antonio Harto-Castaño, Yolanda Gilaberte
BACKGROUND: Therapies used to treat chondrodermatitis nodularis helicis (CNH), such as surgical excision, pressure relief, or topical steroids report varying degrees of success. OBJECTIVE: We evaluated the response and safety of methyl aminolevulinate (MAL) photodynamic therapy (PDT) in CNH. METHODS: This retrospective, observational study performed at the University Hospital Ramon y Cajal (Madrid, Spain) and Hospital San Jorge (Huesca, Spain) included all patients diagnosed with CNH and treated with MAL-PDT from 2008 to 2015...
February 16, 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28215153/engineered-muscle-tissues-for-disease-modeling-and-drug-screening-applications
#14
Mohammad Hossein Mohammadi, Raquel Obregón, Samad Ahadian, Javier Ramón-Azcón, Milica Radisic
Animal models have been the main resources for drug discovery and prediction of drugs' pharmacokinetic responses in the body. However, noticeable drawbacks associated with animal models include high cost, low reproducibility, low physiological similarity to humans, and ethical problems. Engineered tissue models have recently emerged as an alternative or substitute for animal models in drug discovery and testing and disease modeling. In this review, we focus on skeletal muscle and cardiac muscle tissues by first describing their characterization and physiology...
February 15, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28214875/a-developmental-study-of-the-cerebellar-nucleus-in-the-catshark-a-basal-gnathostome
#15
Sol Pose-Méndez, Isabel Rodríguez-Moldes, Eva Candal, Sylvie Mazan, Ramón Anadón
The output of the cerebellar cortex is mainly released via cerebellar nuclei which vary in number and complexity among gnathostomes, extant vertebrates with a cerebellum. Cartilaginous fishes, a basal gnathostome lineage, show a conspicuous, well-organized cerebellar nucleus, unlike ray-finned fishes. To gain insight into the evolution and development of the cerebellar nucleus, we analyzed in the shark Scyliorhinus canicula (a chondrichthyan model species) the developmental expression of several genes coding for transcription factors (ScLhx5,ScLhx9,ScTbr1, and ScEn2) and the distribution of the protein calbindin, since all appear to be involved in cerebellar nuclei patterning in other gnathostomes...
February 18, 2017: Brain, Behavior and Evolution
https://www.readbyqxmd.com/read/28214501/from-the-editor-s-desk-march-2017
#16
Richard Moreau, Ramon Bataller, Thomas Berg, Jessica Zucman-Rossi, Rajiv Jalan
No abstract text is available yet for this article.
March 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28214246/wolff-parkinson-white-syndrome-associated-with-a-fistula-between-the-right-atrial-appendage-and-right-ventricle
#17
Ignacio Roy, Virginia Álvarez, José-Miguel Ormaetxe, Jesús-Daniel Martínez-Alday, Ramón Pérez-Caballero, Juan Miguel Gil-Jaurena
No abstract text is available yet for this article.
February 14, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/28212859/docosahexaenoic-acid-phospholipid-differentially-modulates-the-conformation-of-g90v-and-n55k-rhodopsin-mutants-associated-with-retinitis-pigmentosa
#18
Xiaoyun Dong, María Guadalupe Herrera-Hernández, Eva Ramon, Pere Garriga
Rhodopsin is the visual photoreceptor of the retinal rod cells that mediates dim light vision and a prototypical member of the G protein-coupled receptor superfamily. The structural stability and functional performance of rhodopsin are modulated by membrane lipids. Docosahexaenoic acid has been shown to interact with native rhodopsin but no direct evidence has been established on the effect of such lipid on the stability and regeneration of rhodopsin mutants associated with retinal diseases. The stability and regeneration of two thermosensitive mutants G90V and N55K, associated with the retinal degenerative disease retinitis pigmentosa, have been analyzed in docosohexaenoic phospholipid (1,2-didocosa-hexaenoyl-sn-glycero-3-phosphocholine; DDHA-PC) liposomes...
February 14, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28211620/benchmark-ditopic-binding-of-cl-and-cs-by-the-macrocycle-hexacyclen
#19
Juan Ramon Aviles-Moreno, Giel Berden, Jos Oomens, Bruno Martinez-Haya
The ditopic binding of organic and inorganic anions and cations constitutes a distinct feature of polyazamacrocycles that underlies their action as intermediate docking and exchange ionophoric sites for tailored supramolecular synthesis and sensors. This work investigates the Cl- and Cs+ complexes formed by hexacyclen (1,4,7,10,13,16-hexaazacyclooctadecane, ha18c6), a benchmark building block of ion-pair polyamine receptors. Infrared action spectroscopy is employed to characterize the anionic and cationic complexes under controlled environmental conditions in an ion trap...
February 17, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28211363/nanowire-networks-and-hollow-nanospheres-of-ag-au-bimetallic-alloys-at-room-temperature
#20
R Britto Hurtado, M Cortez-Valadez, H Arizpe-Chávez, N S Flores-Lopez, Ramón A B Álvarez, M Flores-Acosta
Due to their physicochemical properties, metallic nanoalloys have potential applications in biomedicine, electrocatalysis and electrochemical sensors, among many other fields. New alternative procedures have emerged in order to reduce production costs and the use of toxic substances. In this study we present a novel low-toxicity synthesis method for the fabrication of nanowire networks (NWNs) and Ag-Au hollow nanospheres. The synthesis process is performed at room temperature without any sophisticated equipment, such as special cameras or furnaces, etc...
March 17, 2017: Nanotechnology
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