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https://www.readbyqxmd.com/read/28820941/a-photoactivatable-probe-for-super-resolution-imaging-of-enzymatic-activity-in-live-cells
#1
Elias A Halabi, Zacharias Thiel, Nils Trapp, Dorothea Pinotsi, Pablo Rivera-Fuentes
A dual-activatable, fluorogenic probe was developed to sense esterase activity with single-molecule resolution. Without enzymatic pre-activation, the diazoindanone-based probe has an electron poor core and, upon irradiation, undergoes Wolff rearrangement to give a ring-expanded xanthene core that is non-emissive. If the probe is pre-activated by carboxylesterases, the tricyclic core becomes electron-rich and the photoinduced Wolff rearrangement produces a highly emissive rhodol dye. Live-cell and solution studies confirmed the selectivity of the probe and revealed that the photoactivated dye does not diffuse away from the original location of activation because the intermediate ketene forms a covalent bond with surrounding macromolecules...
August 18, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28820557/papillary-muscle-rupture-in-an-adolescent-with-no-coronary-lesions
#2
Tatjana Lejko Zupanc, Mateja Logar
A 21-year-old man with Wolff-Parkinson-White syndrome presented to the authors' hospital with ventricular fibrillation. Coronary angiography failed to demonstrate coronary stenosis, but temporary mechanical circulatory support resolved the ventricular fibrillation and the patient was extubated eight days later. On the next day, however, he had to be re-intubated with symptoms of congestive heart failure. Echocardiography revealed new severe mitral regurgitation and a mobile mass, while emergency surgery revealed a posteromedial papillary muscle rupture (PMR)...
March 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28820140/clarity-of-objectives-and-working-principles-enhances-the-success-of-biomimetic-programs
#3
Jonas Wolff, David Wells, Chris Reid, Sean John Blamires
Biomimetics, the transfer of functional principles from living systems into product designs, is increasingly being utilized by engineers. Nevertheless, recurring problems must be overcome if it is to avoid becoming a short-lived fad. Here we assess the efficiency and suitability of methods typically employed by examining three flagship examples of biomimetic design approaches from different disciplines: (1) the creation of gecko-inspired adhesives; (2) the synthesis of spider silk, and (3) the derivation of computer algorithms from natural self-organizing systems...
August 18, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28819816/a-new-non-radioactive-deoxyhypusine-synthase-assay-adaptable-to-high-throughput-screening
#4
Myung Hee Park, Ajeet Mandal, Swati Mandal, Edith C Wolff
Deoxyhypusine synthase (DHS) catalyzes the post-translational modification of eukaryotic translation factor 5A (eIF5A) by the polyamine, spermidine, that converts one specific lysine residue to deoxyhypusine [N (ε) -4-aminobutyl(lysine)], which is subsequently hydroxylated to hypusine [N (ε) -4-amino-2-hydroxybutyl(lysine)]. Hypusine synthesis represents the most critical function of polyamine. As eIF5A has been implicated in various human diseases, identification of specific inhibitors of hypusine modification is of vital importance...
August 17, 2017: Amino Acids
https://www.readbyqxmd.com/read/28819179/identification-of-polo-like-kinases-as-potential-novel-drug-targets-for-influenza-a-virus
#5
Marie O Pohl, Jessica von Recum-Knepper, Ariel Rodriguez-Frandsen, Caroline Lanz, Emilio Yángüez, Stephen Soonthornvacharin, Thorsten Wolff, Sumit K Chanda, Silke Stertz
In recent years genome-wide RNAi screens have revealed hundreds of cellular factors required for influenza virus infections in human cells. The long-term goal is to establish some of them as drug targets for the development of the next generation of antivirals against influenza. We found that several members of the polo-like kinases (PLK), a family of serine/threonine kinases with well-known roles in cell cycle regulation, were identified as hits in four different RNAi screens and we therefore studied their potential as drug target for influenza...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28815717/partial-inferior-turbinectomy-in-rhinoseptoplasty-has-no-effect-in-quality-of-life-outcomes-a-randomized-clinical-trial
#6
Bianca H de Moura, Raphaella O Migliavacca, Rafaela K Lima, José E L Dolci, Martina Becker, Cássia Feijó, Elisa Brauwers, Michelle Lavinsky-Wolff
OBJECTIVE: Evaluate the impact of endoscopic partial inferior turbinectomy (EPIT) associated with primary rhinoseptoplasty on quality-of-life outcomes (QOL), complications, and surgical duration. STUDY DESIGN: Randomized clinical trial. METHODS: Individuals with nasal obstruction aged ≥ 16 years who were candidates for functional and aesthetics primary rhinoseptoplasty were evaluated from March 2014 through May 2015. Eligible participants were randomly allocated to rhinoseptoplasty with or without EPIT (excision of one-third of the inferior turbinates)...
August 16, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28814894/startle-modulation-by-heat-pain-with-varying-threat-levels-in-chronic-pain-patients-and-pain-free-controls
#7
C Horn-Hofmann, D Wolf, S Wolff, M Heesen, K Knippenberg-Bigge, P M Lang, S Lautenbacher
BACKGROUND: Empirical evidence suggests that affective responses to pain are changed in chronic pain. The investigation of startle responses to pain might contribute to clarifying whether such alterations also expand to motivational defensive reactions. We aimed at comparing startle responses to tonic heat pain with high threat (HT) or low threat (LT) in patients with chronic musculoskeletal pain and controls. As pain-related anxiety and catastrophizing are typically elevated in chronic pain, we expected to find stronger startle responses in patients specifically under experimental HT...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28814044/a-survey-of-stakeholder-perspectives-on-a-proposed-combined-exoskeleton-wheelchair-technology
#8
Tim Bhatnagar, W Ben Mortensen, Johanne Mattie, Jamie Wolff, Claire Parker, Jaimie Borisoff
BACKGROUND: Exoskeleton technology has potential benefits for wheelchair users' health and mobility. However, there are practical barriers to their everyday use as a mobility device. In particular, challenges related to travelling longer distances and transitioning between using a wheelchair and exoskeleton walking may present significant deterrents to regular exoskeleton use. In an effort to remove these barriers, a combined exoskeleton-wheelchair concept ('COMBO') has been proposed, which aims to achieve the benefits of both these mobility technologies...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28811361/chemoradiotherapy-resistance-in-colorectal-cancer-cells-is-mediated-by-wnt-%C3%AE-catenin-signaling
#9
Georg Emons, Melanie Spitzner, Sebastian Reineke, Janneke Möller, Noam Auslander, Frank Kramer, Yue Hu, Tim Beissbarth, Hendrik A Wolff, Margret Rave-Fränk, Elisabeth Heßmann, Jochen Gaedcke, B Michael Ghadimi, Steven Johnsen, Thomas Ried, Marian Grade
Activation of Wnt/β-catenin signaling plays a central role in the development and progression of colorectal cancer (CRC). The Wnt-transcription factor, TCF7L2, is overexpressed in primary rectal cancers that are resistant to chemoradiotherapy (CRT) and TCF7L2 mediates resistance to CRT. However, it is unclear whether the resistance is mediated by a TCF7L2 inherent mechanism or Wnt/β-catenin signaling in general. Here, inhibition of β-catenin by siRNAs or a small molecule inhibitor (XAV-939) resulted in sensitization of CRC cells to CRT...
August 15, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28811173/prenatal-exposure-to-pyrethroid-pesticides-and-childhood-behavior-and-executive-functioning
#10
Melissa A Furlong, Dana Boyd Barr, Mary S Wolff, Stephanie M Engel
Several previous studies of pyrethroid biomarkers and behavior have reported associations between concurrent pyrethroid levels and adverse behavioral problems in children. One geospatial study reported associations between prenatal exposure to pyrethroids and autism. However, the association between prenatal pyrethroid biomarkers and childhood behavior is unknown. The Mount Sinai Children's Environmental Health Center is a prospective birth cohort with urinary pyrethroid biomarkers during pregnancy and behavioral measurements at 4, 6, and 7-9 years of age...
August 12, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28811088/primary-prevention-aspirin-use-in-high-risk-patients-a-pharmacist-intervention-and-comparison-of-risk-stratification-tools
#11
Scott A Coon, Amie D Brooks, Stephen E Wolff
OBJECTIVES: The objectives of this project are 1) to describe aspirin use for primary prevention in an underserved, minority population; 2) to determine the impact of a pharmacist-led intervention on the prevalence of aspirin use for primary prevention; and 3) to compare aspirin indications based on Framingham Risk Score (FRS) and atherosclerotic cardiovascular disease (ASCVD) risk score. METHODS: Men and women age 45-79 and 55-79 years, respectively, without ASCVD were screened for aspirin use...
August 12, 2017: Journal of the American Pharmacists Association: JAPhA
https://www.readbyqxmd.com/read/28810450/perceived-somatic-and-affective-barriers-for-self-efficacy-and-physical-activity
#12
Lisa M Warner, Julia K Wolff, Svenja M Spuling, Susanne Wurm
According to Bandura's social-cognitive theory, perceptions of somatic and affective barriers are sources of self-efficacy. This longitudinal study compares general indicators of health barriers with measures of perceived somatic and affective barriers to predict self-efficacy and accelerometer-assessed physical activity in a subsample of n = 153 (selected at random from N = 310) community-dwelling German older adults. Perceived somatic and affective barriers longitudinally predicted physical activity mediated by self-efficacy, whereas general health barriers did not...
May 1, 2017: Journal of Health Psychology
https://www.readbyqxmd.com/read/28809742/treatment-of-chronic-hcv-infection-with-the-new-direct-acting-antivirals-daa-first-report-of-a-real-world-experience-in-southern-brazil
#13
Hugo Cheinquer, Hoel Sette-Jr, Fernando H Wolff, Alexandre de Araujo, Silvia Coelho-Borges, Silvia R P Soares, Mauricio F A Barros
INTRODUCTION AND AIM: There is almost no data regarding the efficacy of direct acting antivirals (DAAs) therapy in Brazil. The aim of this historical cohort study is to describe the sustained virologic response (SVR) rate among real-world compensated chronic hepatitis C patients in three hepatology centers from Southern Brazil. MATERIALS AND METHODS: Patients were included if they had at least 12 weeks follow-up after the end of therapy. Patients that were lost to follow-up or had treatment prematurely interrupted for any reason were considered treatment failure in this intention to treat analysis...
August 8, 2017: Annals of Hepatology
https://www.readbyqxmd.com/read/28809732/validation-of-the-simplified-criteria-for-the-diagnosis-of-autoimmune-hepatitis-in-chilean-hispanic-patients
#14
Roberto Candia, Blanca Norero, Carlos Agu Ero, Luis Díaz, Juan Pablo Ortega, Rodrigo Wolff, Cristian Hernández-Rocha, Ignacio Duarte, Alejandro Soza, Carlos Benítez, Marco Arrese
INTRODUCTION AND AIM: In 2008 the International autoimmune hepatitis (AIH) Group proposed the simplified diagnostic criteria for this disease. The original cohort study was performed in 11 international centers, but validation studies are scarce in Latin-America. The aim of this study is validate these criteria in Hispanic patients. MATERIAL AND METHODS: A retrospective cohort of patients undergoing percutaneous liver biopsy and follow-up of at least 12 months was recruited from a Chilean University hospital...
August 8, 2017: Annals of Hepatology
https://www.readbyqxmd.com/read/28808336/linear-and-non-linear-responses-of-vegetation-and-soils-to-glacial-interglacial-climate-change-in-a-mediterranean-refuge
#15
Jens Holtvoeth, Hendrik Vogel, Verushka Valsecchi, Katja Lindhorst, Stefan Schouten, Bernd Wagner, George A Wolff
The impact of past global climate change on local terrestrial ecosystems and their vegetation and soil organic matter (OM) pools is often non-linear and poorly constrained. To address this, we investigated the response of a temperate habitat influenced by global climate change in a key glacial refuge, Lake Ohrid (Albania, Macedonia). We applied independent geochemical and palynological proxies to a sedimentary archive from the lake over the penultimate glacial-interglacial transition (MIS 6-5) and the following interglacial (MIS 5e-c), targeting lake surface temperature as an indicator of regional climatic development and the supply of pollen and biomarkers from the vegetation and soil OM pools to determine local habitat response...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28808263/ising-ferromagnets-on-proximity-graphs-with-varying-disorder-of-the-node-placement
#16
Hendrik Schawe, Christoph Norrenbrock, Alexander K Hartmann
We perform Monte Carlo simulations to determine the critical temperatures of Ising Ferromagnets (IFM) on different types of two-dimensional proximity graphs, in which the distribution of their underlying node sets has been changed systematically by means of a parameter σ. This allows us to interpolate between regular grids and proximity graphs based on complete random placement of nodes. Each edge of the planar proximity graphs carries a weighted ferromagnetic coupling. The coupling strengths are determined via the Euclidean distances between coupled spins...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28806280/integrated-analysis-of-biopsies-from-inflammatory-bowel-disease-patients-identifies-saa1-as-a-link-between-mucosal-microbes-with-th17-and-th22-cells
#17
Mei San Tang, Rowann Bowcutt, Jacqueline M Leung, Martin J Wolff, Uma M Gundra, David Hudesman, Lisa B Malter, Michael A Poles, Lea Ann Chen, Zhiheng Pei, Antonio G Neto, Wasif M Abidi, Thomas Ullman, Lloyd Mayer, Richard A Bonneau, Ilseung Cho, Pʼng Loke
BACKGROUND: Inflammatory bowel diseases (IBD) are believed to be driven by dysregulated interactions between the host and the gut microbiota. Our goal is to characterize and infer relationships between mucosal T cells, the host tissue environment, and microbial communities in patients with IBD who will serve as basis for mechanistic studies on human IBD. METHODS: We characterized mucosal CD4 T cells using flow cytometry, along with matching mucosal global gene expression and microbial communities data from 35 pinch biopsy samples from patients with IBD...
August 9, 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28804390/relations-between-views-on-ageing-and-perceived-age-discrimination-a-domain-specific-perspective
#18
Peggy Voss, Julia K Wolff, Klaus Rothermund
This study investigates the relation between age stereotypes and perceived age discrimination. Existing evidence for such a relation is notoriously ambiguous with regard to its direction-age stereotypes can predict (perceived) discrimination, but experiencing discrimination may also change views on ageing-which is why we used a dataset with two waves to disentangle the direction of the associations. Considering research on the multi-dimensionality of views on ageing and perceived age discrimination, we addressed this question from a domain- and age group-specific perspective...
March 2017: European Journal of Ageing
https://www.readbyqxmd.com/read/28803130/prenatal-phthalate-exposures-and-child-temperament-at-12-and-24-months
#19
Alison B Singer, Mary S Wolff, Manori J Silva, Antonia M Calafat, Stephanie M Engel
INTRODUCTION: Gestational phthalate exposures have been adversely associated with attention, externalizing, and internalizing behaviors in childhood. Early childhood temperament may be a marker of later behavioral patterns. We therefore sought to determine whether gestational phthalate exposures were associated with infant and toddler temperament. METHODS: The Mount Sinai Children's Environmental Health Study is a prospective cohort study of children born between May 1998 and July 2001 in New York City (N=404)...
August 9, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28802570/organ-preservation-is-less-frequently-performed-in-women-surgically-treated-for-papillary-renal-cell-carcinoma-results-of-a-comprehensive-multicenter-study
#20
Ingmar Wolff, Anna Scavuzzo, Umberto Capitanio, Tobias Klatte, Shahrokh F Shariat, Nina Wagener, Stefan Zastrow, Hendrik Borgmann, Laura-Maria Krabbe, Georg Hutterer, Matthias May, Sabine D Brookman-May
OBJECTIVE: To analyze the impact of gender on clinico-pathological features and survival of patients with surgically treated papillary renal cell carcinoma (RCC) using a comprehensive international multicenter database. MATERIALS AND METHODS: Data of 2,325 patients undergoing surgery for unilateral papillary RCC between 1984 and 2015 in 17 European and North-American centers were retrospectively collated. The impact of clinico-pathological features on the likelihood of nephron-sparing surgery (NSS) was evaluated using a multivariable logistic regression model...
August 9, 2017: Urology
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