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https://www.readbyqxmd.com/read/28820955/integration-of-an-in-situ-maldi-based-high-throughput-screening-process-a-case-study-with-receptor-tyrosine-kinase-c-met
#1
Katrin Beeman, Jens Baumgärtner, Manuel Laubenheimer, Karlheinz Hergesell, Martin Hoffmann, Ulrich Pehl, Frank Fischer, Jan-Carsten Pieck
Mass spectrometry (MS) is known for its label-free detection of substrates and products from a variety of enzyme reactions. Recent hardware improvements have increased interest in the use of matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) MS for high-throughput drug discovery. Despite interest in this technology, several challenges remain and must be overcome before MALDI-MS can be integrated as an automated "in-line reader" for high-throughput drug discovery. Two such hurdles include in situ sample processing and deposition, as well as integration of MALDI-MS for enzymatic screening assays that usually contain high levels of MS-incompatible components...
August 1, 2017: SLAS Discovery
https://www.readbyqxmd.com/read/28820938/multi-scale-simulation-of-receptor-drug-association-kinetics-application-to-neuramidase-inhibitors
#2
Fabian Zeller, Manuel P Luitz, Rainer Bomblies, Martin Zacharias
A detailed understanding of the drug-receptor association process is of fundamental importance for drug design. Due to the long timescales of typical binding kinetics, the atomistic simulation of the ligand traveling from bulk solution into the binding site is still computationally challenging. In this work, we apply a multi-scale approach of combined molecular dynamics (MD) and Brownian dynamics (BD) simulations to investigate association pathway ensembles for the two prominent H1N1 neuraminidase inhibitors oseltamivir and zanamivir...
August 18, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28820850/ultrasonographic-findings-in-the-vitreous-of-patients-with-age-related-macular-degeneration-treated-with-intravitreal-anti-vascular-endothelial-growth-factor-injections
#3
Tamara Mato-Gondelle, Manuel F Bande, Laura Paniagua, María J Rodríguez-Cid, Maximino Abraldes, Maribel Fernández, María J Blanco-Teijeiro, Antonio Piñeiro
PURPOSE: We aimed to assess the relationship of repeated intravitreal injection of anti-vascular endothelial growth factor, the main treatment for exudative age-related macular degeneration, with changes in vitreous ultrasonographic findings in patients with age-related macular degeneration. METHODS: We retrospectively collected data from 41 patients (41 age-related macular degeneration eyes, 41 control eyes) on age, sex, number of injections, and type of anti-vascular endothelial growth factor (ranibizumab, aflibercept)...
August 16, 2017: Retina
https://www.readbyqxmd.com/read/28820714/epidemiology-of-cutaneous-leishmaniasis-in-a-colombian-municipality
#4
Diego Alejandro Medina-Morales, Manuel E Machado-Duque, Jorge Enrique Machado-Alba
This study describes the epidemiological and clinical characteristics of leishmaniasis and the pharmacological treatment of this disease in the municipality of Pueblo Rico, Risaralda, between January 2010 and December 2014. An observational study was conducted using information from the clinical records and epidemiological reports of patients diagnosed and confirmed with leishmaniasis of any age and sex, including sociodemographic, clinical, and pharmacological variables of the therapy received. Univariate and bivariate analyses were performed...
August 14, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28820457/role-of-cyp2c9-cyp2c19-and-ephx-polymorphism-in-the-pharmacokinetic-of-phenytoin-a-study-on-uruguayan-caucasian-subjects
#5
Natalia Guevara, Cecilia Maldonado, Manuel Uría, Raquel González, Manuel Ibarra, Silvana Alvariza, Antonella Carozzi, Carlos Azambuja, Pietro Fagiolino, Marta Vázquez
Phenytoin (PHT) oxidative route leads to its main metabolite p-hydroxyphenytoin (p-HPPH), by means of CYP2C9 and CYP2C19. Formation of p-HPPH proceeds via a reactive arene-oxide intermediate. This intermediate can also be converted into PHT dihydrodiol by microsomal epoxide hydrolase (EPHX). The three enzymes are polymorphically expressed and the genetic variants are responsible for changes in the enzyme activity. In order to evaluate the effect that these polymorphisms have on PHT metabolism, PHT and p-HPPH plasma concentrations were measured and the genotype for the three enzymes was assessed in 50 Uruguayan epileptic patients...
August 18, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/28820238/combustion-assisted-photonic-annealing-of-printable-graphene-inks-via-exothermic-binders
#6
Ethan B Secor, Theodore Z Gao, Manuel H Dos Santos, Shay G Wallace, Karl W Putz, Mark C Hersam
High-throughput and low-temperature processing of high performance nanomaterial inks is an important technical challenge for large-area, flexible printed electronics. In this report, we demonstrate nitrocellulose as an exothermic binder for photonic annealing of conductive graphene inks, leveraging the rapid decomposition kinetics and built-in energy of nitrocellulose to enable versatile process integration. This strategy results in superlative electrical properties that are comparable to extended thermal annealing at 350 °C, using a pulsed light process that is compatible with thermally sensitive substrates...
August 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28819892/post-ictal-missing-dentures
#7
Edward D Foley, Zhuo Sun, Manuel R Castresana
No abstract text is available yet for this article.
August 17, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/28819750/saving-my-mailwoman-s-back-scientific-publishing-in-the-age-of-millennials
#8
EDITORIAL
Manuel Cerqueira, Arianna E Cerqueira, Christina M Cerqueira
No abstract text is available yet for this article.
August 17, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28819364/the-crosstalk-between-ovarian-cancer-stem-cell-niche-and-the-tumor-microenvironment
#9
REVIEW
Manuel Varas-Godoy, Gregory Rice, Sebastián E Illanes
Ovarian cancer is one of the most important causes of cancer-related death among women in the world. Despite advances in ovarian cancer treatment, 70-80% of women who initially respond to therapy eventually relapse and die. There is evidence that a small population of cells within the tumors called cancer stem cells (CSCs) could be responsible for treatment failure due to their enhanced chemoresistance and tumorigenicity. These cells reside in a niche that maintains the principal properties of CSCs. These properties are associated with the capacity of CSCs to interact with different cells of the tumor microenvironment including mesenchymal stem cells, endothelial cells, immune cells, and fibroblasts, promoting cancer progression...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28819307/crispr-cas9-editing-reveals-novel-mechanisms-of-clustered-microrna-regulation-and-function
#10
Lazaros Lataniotis, Andreas Albrecht, Fatma O Kok, Clinton A L Monfries, Lorena Benedetti, Nathan D Lawson, Simon M Hughes, Kathleen Steinhofel, Manuel Mayr, Anna Zampetaki
MicroRNAs (miRNAs) are important regulators of diverse physiological and pathophysiological processes. MiRNA families and clusters are two key features in miRNA biology. Here we explore the use of CRISPR/Cas9 as a powerful tool to delineate the function and regulation of miRNA families and clusters. We focused on four miRNA clusters composed of miRNA members of the same family, homo-clusters or different families, hetero-clusters. Our results highlight different regulatory mechanisms in miRNA cluster expression...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819191/increasing-spring-temperatures-favor-oak-seed-production-in-temperate-areas
#11
Thomas Caignard, Antoine Kremer, Cyril Firmat, Manuel Nicolas, Samuel Venner, Sylvain Delzon
The changes in reproductive phenology (i.e. timing of flowering and fruiting) observed in recent decades demonstrate that tree reproduction has already been altered by climate change. However, understanding the impact of these changes in reproductive success and fitness remains a major challenge for ecologists. We describe here a previously unreported phenomenon: a significant increase in the reproductive effort (seed production) of temperate oaks with increasing spring temperature, observed over the last decade...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28818648/malocclusions-de-classe-ii-division-1%C3%A2-squelettiques-et-dentaires-%C3%A3-valu%C3%A3-es-par-tomographie-volum%C3%A3-trique-%C3%A3-faisceau-conique
#12
Yiling Xu, Heesoo Oh, Manuel O Lagravère
No abstract text is available yet for this article.
August 14, 2017: International Orthodontics
https://www.readbyqxmd.com/read/28818647/malocclusion-class-ii-division-1-skeletal-and-dental-relationships-measured-by-cone-beam-computed-tomography
#13
Yiling Xu, Heesoo Oh, Manuel O Lagravère
OBJECTIVES: The purpose of this study was to locate traditionally-used landmarks in two-dimensional (2D) images and newly-suggested ones in three-dimensional (3D) images (cone-beam computer tomographies [CBCTs]) and determine possible relationships between them to categorize patients with Class II-1 malocclusion. METHODS: CBCTs from 30 patients diagnosed with Class II-1 malocclusion were obtained from the University of Alberta Graduate Orthodontic Program database...
August 14, 2017: International Orthodontics
https://www.readbyqxmd.com/read/28818371/assessment-of-molecular-and-epigenetic-changes-in-the-albinism-of-agave-angustifolia-haw
#14
Rosa Us-Camas, Eduardo Castillo-Castro, Margarita Aguilar-Espinosa, Verónica Limones-Briones, Renata Rivera-Madrid, Manuel L Robert-Díaz, Clelia De-la-Peña
Albinism in plants is a rare phenomenon that occurs in nature and is characterized by the total or partial loss of photosynthetic pigments. Although progress has been made in understanding the nature of this phenomenon, the precise causes and biological basis are still unexplored. Here, we study the genetic and epigenetic differences between green (G), variegated (V) and albino (A) A. angustifolia Haw. plantlets obtained by in vitro propagation in order to present new insights into albinism from a plant system that offers a unique set of biological phenotypic characteristics...
October 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28818287/application-of-flexible-endoscopy-based-biopsy-in-the-diagnosis-of-tumour-pathologies-in-otorhinolaryngology
#15
Carlos Saga, Manuel Olalde, Ekhiñe Larruskain, Leire Álvarez, Xabier Altuna
INTRODUCTION AND OBJECTIVES: Interventional endoscopy allows us to act on the pathology of the patient with minimal discomfort, low costs and high efficiency. We assessed the validity of flexible endoscopic biopsies in our hospital, in lesions suspected of malignancy in the rhino-pharyngo-laryngeal space. SUBJECTS AND METHODS: Retrospective study of patients with a pathology suspected of malignancy assessed between 2006-2016 in our centre. We evaluated the effectiveness, the tolerance and the number of complications...
August 14, 2017: Acta Otorrinolaringológica Española
https://www.readbyqxmd.com/read/28818037/association-of-coral-algal-symbionts-with-a-diverse-viral-community-responsive-to-heat-shock
#16
Jan D Brüwer, Shobhit Agrawal, Yi Jin Liew, Manuel Aranda, Christian R Voolstra
BACKGROUND: Stony corals provide the structural foundation of coral reef ecosystems and are termed holobionts given they engage in symbioses, in particular with photosynthetic dinoflagellates of the genus Symbiodinium. Besides Symbiodinium, corals also engage with bacteria affecting metabolism, immunity, and resilience of the coral holobiont, but the role of associated viruses is largely unknown. In this regard, the increase of studies using RNA sequencing (RNA-Seq) to assess gene expression provides an opportunity to elucidate viral signatures encompassed within the data via careful delineation of sequence reads and their source of origin...
August 17, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28817667/glycoprotein-ib-activation-by-thrombin-stimulates-the-energy-metabolism-in-human-platelets
#17
Norma Corona de la Peña, Manuel Gutiérrez-Aguilar, Ileana Hernández-Reséndiz, Álvaro Marín-Hernández, Sara Rodríguez-Enríquez
Thrombin-induced platelet activation requires substantial amounts of ATP. However, the specific contribution of each ATP-generating pathway i.e., oxidative phosphorylation (OxPhos) versus glycolysis and the biochemical mechanisms involved in the thrombin-induced activation of energy metabolism remain unclear. Here we report an integral analysis on the role of both energy pathways in human platelets activated by several agonists, and the signal transducing mechanisms associated with such activation. We found that thrombin, Trap-6, arachidonic acid, collagen, A23187, epinephrine and ADP significantly increased glycolytic flux (3-38 times vs...
2017: PloS One
https://www.readbyqxmd.com/read/28817208/regio-and-stereoselective-chlorocyanation-of-alkynes
#18
Manuel Alcarazo, Alejandro G Barrado, Richard Goddard, Adam Zielinski
The regio- and stereoselective conversion of alkynes into (Z)-3-chloroacrylonitriles was achieved by treatment of a variety of terminal as well as internal alkynes with BCl3 in the presence of stoichiometric amounts of imidazolium thiocyanates. These products can be easily functionalized into useful building blocks, demonstrating the synthetic value of the method. Preliminary mechanistic studies suggest initial activation of the cationic thiocyanate by the Lewis acid followed by electrophilic attack of the alkyne...
August 17, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28817150/beryllium-based-fluorenes-as-efficient-anion-sponges
#19
M Merced Montero-Campillo, Inés Corral, Otilia Mó, Manuel Yáñez, Ibon Alkorta, José Elguero
The F(-), Cl(-), CN(-), NO2(-), NO3(-), and SO4(2-) anion affinities of 4,5-bis(BeX)-fluorene (X = H, F, Cl, CN, NC, and OCH3) derivatives have been calculated at the B3LYP/6-311+G(3df,2p)//B3LYP/6-31+G(d,p) level of theory. The reliability of this approach was assessed using, for some suitable cases, the accurate G4MP2 ab initio composite method as a reference. The values obtained indicate that these derivatives exhibit anion affinities which are among the largest ones reported for single neutral molecules, and therefore these compounds behave as anion sponges, very much as their 1,8-diBeX-naphthalene analogues...
August 17, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28816742/congenital-lesion-on-the-hand-of-a-child
#20
Eduardo Varas-Meis, Alicia Perez-Bustillo, Sonsoles Vicente-Delgado, Maria Asunción Gonzalez-Morán, Manuel Ángel Rodríguez Prieto
No abstract text is available yet for this article.
August 9, 2017: American Journal of Dermatopathology
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