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https://www.readbyqxmd.com/read/29792154/exploration-of-hetero-aryl-derived-thienylchalcones-for-antiviral-and-anticancer-activities
#1
Vikrant Patil, Siddappa A Patil, Renukadevi Patil, Alejandro Bugarin, Kenneth Beaman, Shivaputra A Patil
BACKGROUND: Search for new antiviral and anticancer agents are essential because of the emergence of drug resistance in recent years. In continuation of our efforts in identifying the new small molecule antiviral and anticancer agents, we identified chalcones as potent antiviral and anticancer agents. OBJECTIVE: With the aim of identifying the broad acting antiviral and anticancer agents, we discovered substituted aryl/heteroaryl derived thienyl chalcones as antiviral and anticancer agents...
May 23, 2018: Medicinal Chemistry
https://www.readbyqxmd.com/read/29791443/traceability-reproducibility-and-wiki-exploration-for-%C3%A3-la-carte-reconstructions-of-genome-scale-metabolic-models
#2
Méziane Aite, Marie Chevallier, Clémence Frioux, Camille Trottier, Jeanne Got, María Paz Cortés, Sebastián N Mendoza, Grégory Carrier, Olivier Dameron, Nicolas Guillaudeux, Mauricio Latorre, Nicolás Loira, Gabriel V Markov, Alejandro Maass, Anne Siegel
Genome-scale metabolic models have become the tool of choice for the global analysis of microorganism metabolism, and their reconstruction has attained high standards of quality and reliability. Improvements in this area have been accompanied by the development of some major platforms and databases, and an explosion of individual bioinformatics methods. Consequently, many recent models result from "à la carte" pipelines, combining the use of platforms, individual tools and biological expertise to enhance the quality of the reconstruction...
May 23, 2018: PLoS Computational Biology
https://www.readbyqxmd.com/read/29791429/-clinical-practice-guideline-for-the-evaluation-and-management-of-upper-gastrointestinal-bleeding-for-the-peruvian-social-security-essalud
#3
Jorge Vásquez-Quiroga, Alvaro Taype-Rondan, Jessica Hanae Zafra-Tanaka, Ericson Arcana-López, Luis Cervera-Caballero, Javier Contreras-Turin, Katherine Guzmán-Cáceres, Juan Llatas-Perez, Luis Marin-Calderón, Alejandro Piscoya, Daniel Vargas-Blácido, Nelly Vásquez-Valverde, Raúl Timaná-Ruiz
OBJECTIVE: To provide evidence-based clinical recommendations for the evaluation and management of patients with upper gastrointestinal bleeding (UGB) in the Peruvian Social Security (EsSalud). MATERIALS AND METHODS: A local guideline development group (local GDG) was established, including specialists in gastroenterology and methodologists. The local GDG formulated 11 clinical questions to be answered by this clinical practice guide (CPG). We searched and selected CPG of UGB published from 2012, which answered the posed questions and obtained a score higher than 60% in domains 1 and 3 of the Appraisal of Guidelines for Research and Evaluation II (AGREE-II) tool...
January 2018: Revista de Gastroenterología del Perú: órgano Oficial de la Sociedad de Gastroenterología del Perú
https://www.readbyqxmd.com/read/29791426/-familiar-adenomatous-polyposis-report-of-2-cases
#4
Luis Vásquez Elera, Patricia Guzman Rojas, Manuel Sánchez Herrera, Víctor Prado, Carlos García Encinas, Eduar Albán Bravo Paredes, Alejandro Bussalleu
Familial Adenomatous polyposis (FAP) it is based on an autosomal dominant mutation which results in loss of function of theAPC tumor suppressor gene. On the other hand, Gardner syndrome is a type of FAP and is characterized for multiple colonic adenomatous polyps and extracolonic abnormalities as desmoid tumors, osteomas, lipomas, dental abnormalities, dermoid cysts and duodenal adenomas. This report aims to present two patients with FAP: The first one is a patient who presented with osteomas and hematochezia, being diagnosed with Gardner Syndrome after the colonoscopy...
January 2018: Revista de Gastroenterología del Perú: órgano Oficial de la Sociedad de Gastroenterología del Perú
https://www.readbyqxmd.com/read/29791415/-the-ides-of-march
#5
EDITORIAL
Alejandro Piscoya
No abstract text is available yet for this article.
January 2018: Revista de Gastroenterología del Perú: órgano Oficial de la Sociedad de Gastroenterología del Perú
https://www.readbyqxmd.com/read/29791132/ptml-model-of-chembl-data-for-dopamine-targets-docking-synthesis-and-assay-of-new-plg-peptidomimetics
#6
Joana Ferreira da Costa, David Silva, Olga Caamaño, José M Brea, Maria Isabel Loza, Cristian R Munteanu, Alejandro Pazos, Xerardo García-Mera, Humbert González-Díaz
Predicting Drug-Protein Interactions (DPIs) for target proteins involved in Dopamine pathways is very important goal in medicinal chemistry. We can tackle this problem using Molecular Docking or Machine Learning (ML) models for one specific protein. Unfortunately, these models fail to account for large and complex Big Data sets of preclinical assays reported in public databases. This includes multiple conditions of assay like different experimental parameters, biological assays, target proteins, cell lines, organism of the target, organism of assay, etc...
May 23, 2018: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/29790838/release-of-taurine-and-glutamate-contributes-to-cell-volume-regulation-in-human-retinal-m%C3%A3-ller-cells-differences-in-modulation-by-calcium
#7
Vanina Netti, Alejandro Pizzoni, Martha Peréz-Domínguez, Paula Ford, Herminia Pasantes-Morales, Gerardo Ramos-Mandujano, Claudia Capurro
Neuronal activity in the retina generates osmotic gradients that lead to Müller cell swelling, followed by a regulatory volume decrease (RVD) response, partially due to the isoosmotic efflux of KCl and water. However, our previous studies in a human Müller cell line (MIO-M1) demonstrated that an important fraction of RVD may also involve the efflux of organic solutes. We also showed that RVD depends on the swelling-induced Ca2+ release from intracellular stores. Here we investigate the contribution of Taurine (Tau) and Glutamate (Glu), the most relevant amino acids in Müller cells, to RVD through the volume-regulated anion channel (VRAC), as well as their Ca2+ -dependency in MIO-M1 cells...
May 23, 2018: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29789895/diffusion-weighted-imaging-determinants-for-acute-ischemic-stroke-diagnosis-in-the-emergency-room
#8
Alejandro M Brunser, Gabriel Cavada, Paula Muñoz Venturelli, Verónica Olavarría, Alexis Rojo, Juan Almeida, Violeta Díaz, Arnold Hoppe, Pablo Lavados
PURPOSE: The aim of this study was to investigate the clinical-radiological determinants of diffusion-weighted image (DWI) abnormalities in patients with suspected acute ischemic stroke (AIS) seen at the emergency room (ER). METHODS: During the study period, 882 consecutive patients were screened at Clínica Alemana de Santiago, Chile; 786 had AIS and 711 (90.4%) were included. RESULTS: DWI demonstrated 87.3% sensitivity and 99.0% specificity, with a positive likelihood ratio of 79 and a negative likelihood ratio of 0...
May 22, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29789706/short-segment-transverse-myelitis-lesions-in-a-cohort-of-latin-american-patients-with-neuromyelitis-optica-spectrum-disorders
#9
Edgar Carnero Contentti, Vanessa Daccach Marques, Ibis Soto de Castillo, Verónica Tkachuk, Amilton Antunes Barreira, Elizabeth Armas, Edson Chiganer, Camila de Aquino Cruz, José Luis Di Pace, Javier Pablo Hryb, Carolina Lavigne Moreira, Carmen Lessa, Omaira Molina, Mónica Perassolo, Arnoldo Soto, Alejandro Caride
STUDY DESIGN: Multicenter retrospective study. OBJECTIVES: The aim was to determine the frequency and magnetic resonance imaging (MRI) features of short-segment transverse myelitis (STM) in patients with neuromyelitis optica spectrum disorders (NMOSD) during a myelitis attack. SETTING: Latin American diagnostic centres (Neuroimmunology Unit). A multicenter study from Argentina, Brazil and Venezuela was performed. METHODS: Seventy-six patients with NMOSD were included...
May 22, 2018: Spinal Cord
https://www.readbyqxmd.com/read/29789016/unraveling-bacterial-fingerprints-of-city-subways-from-microbiome-16s-gene-profiles
#10
Alejandro R Walker, Tyler L Grimes, Somnath Datta, Susmita Datta
BACKGROUND: Microbial communities can be location specific, and the abundance of species within locations can influence our ability to determine whether a sample belongs to one city or another. As part of the 2017 CAMDA MetaSUB Inter-City Challenge, next generation sequencing (NGS) data was generated from swipe samples collected from subway stations in Boston, New York City hereafter New York, and Sacramento. DNA was extracted and Illumina sequenced. Sequencing data was provided for all cities as part of 2017 CAMDA contest challenge dataset...
May 22, 2018: Biology Direct
https://www.readbyqxmd.com/read/29788250/comparative-genomics-reveals-thousands-of-novel-chemosensory-genes-and-massive-changes-in-chemoreceptor-repertories-across-chelicerates
#11
Joel Vizueta, Julio Rozas, Alejandro Sánchez-Gracia
Chemoreception is a widespread biological function that is essential for the survival, reproduction, and social communication of animals. Though the molecular mechanisms underlying chemoreception are relatively well known in insects, they are poorly studied in the other major arthropod lineages. Current availability of a number of chelicerate genomes constitutes a great opportunity to better characterize gene families involved in this important function in a lineage that emerged and colonized land independently of insects...
April 1, 2018: Genome Biology and Evolution
https://www.readbyqxmd.com/read/29788075/effects-of-immunonutrition-in-advanced-hiv-disease-a-randomized-placebo-controlled-clinical-trial-promaltia-study
#12
Sergio Serrano-Villar, María de Lagarde, Jorge Vázquez-Castellanos, Alejandro Vallejo, J Ignacio Bernadino, Nadia Madrid, Mariano Matarranz, Alberto Díaz-Santiago, Carolina Gutiérrez, Alfonso Cabello, Judit Villar-García, José Ramón Blanco, Otilia Bisbal, Talía Sainz, Andrés Moya, Santiago Moreno, María José Gosalbes, Vicente Estrada
Background: While nutritional interventions with prebiotics and probiotics seem to exert immunological effects, their clinical implications in HIV-infected subjects initiating ART at advanced HIV disease remain unclear. Methodology: Pilot multicenter randomized, placebo-controlled, double-blind study in which 78 HIV-infected, ART-naive subjects with <350 CD4 T-cells/µl or AIDS were randomized to either daily PMT25341 (a mixture of prebiotics, probiotics, oligonutrients, DHA, EPA, GLA, and aminoacids) or placebo for 48 weeks, each in combination with first-line ART...
May 16, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29786095/high-throughput-creation-and-functional-profiling-of-dna-sequence-variant-libraries-using-crispr-cas9-in-yeast
#13
Xiaoge Guo, Alejandro Chavez, Angela Tung, Yingleong Chan, Christian Kaas, Yi Yin, Ryan Cecchi, Santiago Lopez Garnier, Eric D Kelsic, Max Schubert, James E DiCarlo, James J Collins, George M Church
Construction and characterization of large genetic variant libraries is essential for understanding genome function, but remains challenging. Here, we introduce a Cas9-based approach for generating pools of mutants with defined genetic alterations (deletions, substitutions, and insertions) with an efficiency of 80-100% in yeast, along with methods for tracking their fitness en masse. We demonstrate the utility of our approach by characterizing the DNA helicase SGS1 with small tiling deletion mutants that span the length of the protein and a series of point mutations against highly conserved residues in the protein...
May 21, 2018: Nature Biotechnology
https://www.readbyqxmd.com/read/29785104/respiratory-medication-used-in-copd-patients-from-seven-latin-american-countries-the-lassyc-study
#14
Alejandro Casas, Maria Montes de Oca, Ana Mb Menezes, Fernando C Wehrmeister, Maria Victorina Lopez Varela, Laura Mendoza, Larissa Ramírez, Marc Miravitlles
Background: Limited information is available regarding medication use in COPD patients from Latin America. This study evaluated the type of medication used and the adherence to different inhaled treatments in stable COPD patients from the Latin American region. Methods: This was an observational, cross-sectional, multinational, and multicenter study in COPD patients attended by specialist doctors from seven Latin American countries. Adherence to inhaled therapy was assessed using the Test of Adherence to Inhalers (TAI) questionnaire...
2018: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/29785059/early-nt-probnp-levels-as-a-screening-tool-for-the-detection-of-hemodynamically-significant-patent-ductus-arteriosus-during-the-first-week-of-life-in-very-low-birth-weight-infants
#15
Silvia Rodriguez-Blanco, Ignacio Oulego-Erroz, Sandra Gautreaux-Minaya, Alejandro Perez-Muñuzuri, Maria Luz Couce-Pico
OBJECTIVE: To assess whether early NT-ProBNP can identify the need for echocardiographic assessment of hemodynamically significant patent ductus arteriosus (HsPDA) in preterm infants. STUDY DESIGN: Prospective observational study of infants with a gestational age ≤32 weeks. Echocardiographic assessment and NT-proBNP measurement were performed at 48-96 h. ROC curves were generated to assess optimal cutoffs to detect HsPDA and predict the need for treatment. RESULTS: Eighty-five patients were included...
May 22, 2018: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/29784938/characterization-of-the-rat-cerebrospinal-fluid-proteome-following-acute-cerebral-ischemia-using-an-aptamer-based-proteomic-technology
#16
Alba Simats, Teresa García-Berrocoso, Laura Ramiro, Dolors Giralt, Natalia Gill, Anna Penalba, Alejandro Bustamante, Anna Rosell, Joan Montaner
The limited accessibility to the brain has turned the cerebrospinal fluid (CSF) into a valuable source that may contribute to the complete understanding of the stroke pathophysiology. Here we have described the CSF proteome in the hyper-acute phase of cerebral ischemia by performing an aptamer-based proteomic assay (SOMAscan) in CSF samples collected before and 30 min after male Wistar rats had undergone a 90 min Middle Cerebral Artery Occlusion (MCAO) or sham-surgery. Proteomic results indicated that cerebral ischemia acutely increased the CSF levels of 716 proteins, mostly overrepresented in leukocyte chemotaxis and neuronal death processes...
May 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29784932/molecular-size-modulates-pharmacokinetics-biodistribution-and-renal-deposition-of-the-drug-delivery-biopolymer-elastin-like-polypeptide
#17
Marija Kuna, Fakhri Mahdi, Alejandro R Chade, Gene L Bidwell
Elastin-like polypeptides (ELP) are engineered proteins that consist of repetitions of a five amino acid motif, and their composition is easily modified to adjust their physical properties and attach therapeutics. Because of the repetitive nature of the ELP sequence, polymer size is particularly amenable to manipulation. ELP fusion proteins are being actively developed as therapeutics for many disease applications, and how the ELP size and shape affects its pharmacokinetics and biodistribution is a critical question for the general field of ELP drug delivery...
May 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29784918/early-lineage-segregation-of-multipotent-embryonic-mammary-gland-progenitors
#18
Aline Wuidart, Alejandro Sifrim, Marco Fioramonti, Shigeru Matsumura, Audrey Brisebarre, Daniel Brown, Alessia Centonze, Anne Dannau, Christine Dubois, Alexandra Van Keymeulen, Thierry Voet, Cédric Blanpain
The mammary gland is composed of basal cells and luminal cells. It is generally believed that the mammary gland arises from embryonic multipotent progenitors, but it remains unclear when lineage restriction occurs and what mechanisms are responsible for the switch from multipotency to unipotency during its morphogenesis. Here, we perform multicolour lineage tracing and assess the fate of single progenitors, and demonstrate the existence of a developmental switch from multipotency to unipotency during embryonic mammary gland development...
May 21, 2018: Nature Cell Biology
https://www.readbyqxmd.com/read/29784812/distributed-and-dynamic-intracellular-organization-of-extracellular-information
#19
Alejandro A Granados, Julian M J Pietsch, Sarah A Cepeda-Humerez, Iseabail L Farquhar, Gašper Tkačik, Peter S Swain
Although cells respond specifically to environments, how environmental identity is encoded intracellularly is not understood. Here, we study this organization of information in budding yeast by estimating the mutual information between environmental transitions and the dynamics of nuclear translocation for 10 transcription factors. Our method of estimation is general, scalable, and based on decoding from single cells. The dynamics of the transcription factors are necessary to encode the highest amounts of extracellular information, and we show that information is transduced through two channels: Generalists (Msn2/4, Tod6 and Dot6, Maf1, and Sfp1) can encode the nature of multiple stresses, but only if stress is high; specialists (Hog1, Yap1, and Mig1/2) encode one particular stress, but do so more quickly and for a wider range of magnitudes...
May 21, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29783880/ethnography-of-a-parasite-a-quantitative-ethnographic-observation-of-forest-malaria-in-the-amazon-basin
#20
Alejandro Feged-Rivadeneira, Sian Evans
AIMS: Malaria in the Amazon basin is persistently more prevalent among low density populations (1-4 people/[Formula: see text]). Describing malaria transmission in small populations, such as ethnic minorities in the Amazon basin, living in reserves in groups that amount to 110-450 individuals, is fundamental for the implementation of adequate interventions. Here, we examine malaria transmission in a context of high prevalence in a small population of Nükak ethnicity (ethnic group [Formula: see text] individuals, study group, [Formula: see text] individuals) living in the peri-urban area of a city with [Formula: see text] inhabitants in the Amazon basin...
May 1, 2018: Scandinavian Journal of Public Health
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