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https://www.readbyqxmd.com/read/29148434/the-cutting-away-of-potential-secondary-electron-tracks-explains-the-effects-of-beam-size-and-detector-wall-density-in-small-field-photon-dosimetry
#1
Hui Khee Looe, Bjoern Delfs, Daniela Poppinga, Ping Jiang, Dietrich Harder, Bjoern Poppe
The well-known field-size dependent overresponse in small-field photon-beam dosimetry of solid-state detectors equipped with very thin sensitive volumes, such as the PTW microDiamond, cannot be caused by the photon and electron interactions within these sensitive layers because they are only a few micrometers thick. The alternative explanation is that their overresponse is caused by the combination of two effects, the modification of the secondary electron fluence profile i) by a field size too small to warrant lateral secondary electron equilibrium and ii) by the density-dependent electron ranges in the structural detector materials placed in front of or backing the sensitive layer...
November 17, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29131822/impact-of-the-ebola-outbreak-on-trypanosoma-brucei-gambiense-infection-medical-activities-in-coastal-guinea-2014-2015-a-retrospective-analysis-from-the-guinean-national-human-african-trypanosomiasis-control-program
#2
Mariame Camara, Eric Ouattara, Alexandre Duvignaud, René Migliani, Oumou Camara, Mamadou Leno, Philippe Solano, Bruno Bucheton, Mamadou Camara, Denis Malvy
BACKGROUND: The 2014-2015 Ebola outbreak massively hit Guinea. The coastal districts of Boffa, Dubreka and Forecariah, three major foci of Human African Trypanosomiasis (HAT), were particularly affected. We aimed to assess the impact of this epidemic on sleeping sickness screening and caring activities. METHODOLOGY/PRINCIPAL FINDINGS: We used preexisting data from the Guinean sleeping sickness control program, collected between 2012 and 2015. We described monthly: the number of persons (i) screened actively; (ii) or passively; (iii) treated for HAT; (iv) attending post-treatment follow-up visits...
November 13, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29098714/a-potential-new-form-of-jail-diversion-and-reconnection-to-mental-health-services-ii-demonstration-of-feasibility
#3
Michael T Compton, Simone Anderson, Beth Broussard, Samantha Ellis, Brooke Halpern, Luca Pauselli, Marsha O'Neal, Benjamin G Druss, Mark Johnson
Given fragmentation between mental health and criminal justice systems, we tested the feasibility of implementing a potential new form of pre-booking jail diversion. Our "linkage system" consists of three steps: (i) individuals with serious mental illnesses and an arrest history give special consent to be enrolled in a statewide database; (ii) if an officer has an encounter with an enrolled patient and runs a routine background check, he or she receives an electronic message to call; and (iii) the "linkage specialist" provides brief telephonic assistance to the officer...
November 2, 2017: Behavioral Sciences & the Law
https://www.readbyqxmd.com/read/29069510/lnc2meth-a-manually-curated-database-of-regulatory-relationships-between-long-non-coding-rnas-and-dna-methylation-associated-with-human-disease
#4
Hui Zhi, Xin Li, Peng Wang, Yue Gao, Baoqing Gao, Dianshuang Zhou, Yan Zhang, Maoni Guo, Ming Yue, Weitao Shen, Shangwei Ning, Lianhong Jin, Xia Li
Lnc2Meth ( http://www.bio-bigdata.com/Lnc2Meth/ ), an interactive resource to identify regulatory relationships between human long non-coding RNAs (lncRNAs) and DNA methylation, is not only a manually curated collection and annotation of experimentally supported lncRNAs-DNA methylation associations but also a platform that effectively integrates tools for calculating and identifying the differentially methylated lncRNAs and protein-coding genes (PCGs) in diverse human diseases. The resource provides: (i) advanced search possibilities, e...
October 23, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29063542/are-we-there-yet-human-factors-knowledge-and-health-information-technology-the-challenges-of-implementation-and-impact
#5
P Turner, A Kushniruk, C Nohr
Objective: To review the developments in human factors (HF) research on the challenges of health information technology (HIT) implementation and impact given the continuing incidence of usability problems and unintended consequences from HIT development and use. Methods: A search of PubMed/Medline and Web of Science® identified HF research published in 2015 and 2016. Electronic health records (EHRs) and patient-centred HIT emerged as significant foci of recent HF research. The authors selected prominent papers highlighting ongoing HF and usability challenges in these areas...
August 2017: Yearbook of Medical Informatics
https://www.readbyqxmd.com/read/29037975/modular-cell-based-platform-for-high-throughput-identification-of-compounds-that-inhibit-a-viral-interferon-antagonist-of-choice
#6
Andri Vasou, Christina Paulus, Janina Narloch, Zoe O Gage, Marie-Anne Rameix-Welti, Jean-François Eléouët, Michael Nevels, Richard E Randall, Catherine S Adamson
Viral interferon (IFN) antagonists are a diverse class of viral proteins that counteract the host IFN response, which is important for controlling viral infections. Viral IFN antagonists are often multifunctional proteins that perform vital roles in virus replication beyond IFN antagonism. The critical importance of viral IFN antagonists is highlighted by the fact that almost all viruses encode one of these proteins. Inhibition of viral IFN antagonists has the potential to exert pleiotropic antiviral effects and thus this important protein class represents a diverse plethora of novel therapeutic targets...
October 13, 2017: Antiviral Research
https://www.readbyqxmd.com/read/29036554/contrast-venography-vs-microwire-assisted-axillary-venipuncture-for-cardiovascular-implantable-electronic-device-implantation
#7
Jahangir Rashid Beig, Bilal A Ganai, Mohammad S Alai, Ajaz A Lone, Imran Hafeez, Mohd Iqbal Dar, Nisar A Tramboo, Hilal A Rather
Aims: This study was conducted to compare the safety and efficacy of microwire assisted technique with contrast venography guided axillary venipuncture in patients undergoing cardiovascular implantable electronic device (CIED) implantation. Methods and results: This prospective randomized study included 212 consecutive adult patients undergoing CIED implantation at our institute between 2013 and 2015. Patients were randomized to either venography guided technique (Group I; n = 105) or microwire assisted technique (Group II; n = 107) for axillary venipuncture...
September 23, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28990169/methylphenidate-cognition-and-epilepsy-a-1-month-open-label-trial
#8
Jesse Adams, Valerie Alipio-Jocson, Katherine Inoyama, Victoria Bartlett, Saira Sandhu, Jemima Oso, John J Barry, David W Loring, Kimford J Meador
OBJECTIVE: Cognitive difficulties are common in epilepsy. Beyond reducing seizures and adjusting antiepileptic medications, no well-validated treatment exists in adults. Methylphenidate is used effectively in children with epilepsy and attention-deficit/hyperactivity disorder, but its effects in adults have not been systematically evaluated. We hypothesized that methylphenidate can safely improve cognition in adults with epilepsy. We detail here the open-label follow-up to a double-blind, placebo-controlled, single-dose study...
October 9, 2017: Epilepsia
https://www.readbyqxmd.com/read/28987611/5-ene-4-thiazolidinones-an-efficient-tool-in-medicinal-chemistry
#9
REVIEW
Danylo Kaminskyy, Anna Kryshchyshyn, Roman Lesyk
The presented review is an attempt to summarize a huge volume of data on 5-ene-4-thiazolidinones being a widely studied class of small molecules used in modern organic and medicinal chemistry. The manuscript covers approaches to the synthesis of 5-ene-4-thiazolidinone derivatives: modification of the C5 position of the basic core; synthesis of the target compounds in the one-pot or multistage reactions or transformation of other related heterocycles. The most prominent pharmacological profiles of 5-ene derivatives of different 4-thiazolidinone subtypes belonging to hit-, lead-compounds, drug-candidates and drugs as well as the most studied targets have been discussed...
September 20, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28987395/abciximab-heparin-therapy-for-left-ventricular-assist-device-implantation-in-patients-with-heparin-induced-thrombocytopenia
#10
Chia-Ling Lee, Paolo C Colombo, Andrew Eisenberger, David Diuguid, Douglas L Jennings, Jiho Han, Michael P Salna, Koji Takeda, Paul A Kurlansky, Melana Yuzefpolskaya, Arthur R Garan, Yoshifumi Naka, Hiroo Takayama
BACKGROUND: Optimal anticoagulation strategy remains uncertain in patients with heparin-induced thrombocytopenia (HIT) and undergoing left ventricular assist device (LVAD) implantation. We describe our protocol of abciximab and heparin in these patients. METHODS: Our protocol is to administer abciximab, 0.25 mg/kg loading dose, followed by continuous infusion of 0.125 μg · kg(-1) · min(-1) throughout cardiopulmonary bypass. Full-dose heparin is then given with subsequent additional doses to maintain an activated clotting time of 400 seconds or longer...
October 4, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28978299/prevalence-and-overtesting-of-true-heparin-induced-thrombocytopenia-in-a-591-bed-tertiary-care-teaching-hospital
#11
Stephen Farley, Caitlyn Cummings, William Heuser, Shan Wang, Rose Calixte, Adel Hanna, Alexander Axelrad
Heparin-induced thrombocytopenia type II (HIT) is a rare but potentially fatal antibody-mediated reaction to all forms of heparin (unfractionated heparin, low-molecular weight heparin, heparin flushes, and heparin-coated catheters), which can lead to HIT with thrombosis. Two tests commonly used to screen for HIT include the enzyme-linked immunosorbent assay (ELISA) and serotonin release assay (SRA). This is a retrospective chart review study conducted from January 1, 2013, through December 31, 2014, to estimate the rate of true HIT in critical care patients at Winthrop-University Hospital, located in Mineola, New York...
January 1, 2017: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/28978045/mitoriboscins-mitochondrial-based-therapeutics-targeting-cancer-stem-cells-cscs-bacteria-and-pathogenic-yeast
#12
Bela Ozsvari, Marco Fiorillo, Gloria Bonuccelli, Anna Rita Cappello, Luca Frattaruolo, Federica Sotgia, Rachel Trowbridge, Richard Foster, Michael P Lisanti
The "endo-symbiotic theory of mitochondrial evolution" states that mitochondrial organelles evolved from engulfed aerobic bacteria, after millions of years of symbiosis and adaptation. Here, we have exploited this premise to design new antibiotics and novel anti-cancer therapies, using a convergent approach. First, virtual high-throughput screening (vHTS) and computational chemistry were used to identify novel compounds binding to the 3D structure of the mammalian mitochondrial ribosome. The resulting library of ∼880 compounds was then subjected to phenotypic drug screening on human cancer cells, to identify which compounds functionally induce ATP-depletion, which is characteristic of mitochondrial inhibition...
September 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28978032/vitamin-c-and-doxycycline-a-synthetic-lethal-combination-therapy-targeting-metabolic-flexibility-in-cancer-stem-cells-cscs
#13
Ernestina Marianna De Francesco, Gloria Bonuccelli, Marcello Maggiolini, Federica Sotgia, Michael P Lisanti
Here, we developed a new synthetic lethal strategy for further optimizing the eradication of cancer stem cells (CSCs). Briefly, we show that chronic treatment with the FDA-approved antibiotic Doxycycline effectively reduces cellular respiration, by targeting mitochondrial protein translation. The expression of four mitochondrial DNA encoded proteins (MT-ND3, MT-CO2, MT-ATP6 and MT-ATP8) is suppressed, by up to 35-fold. This high selection pressure metabolically synchronizes the surviving cancer cell sub-population towards a predominantly glycolytic phenotype, resulting in metabolic inflexibility...
September 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28974223/ageing-under-unequal-circumstances-a-cross-sectional-analysis-of-the-gender-and-socioeconomic-patterning-of-functional-limitations-among-the-southern-european-elderly
#14
Manuel Serrano-Alarcón, Julian Perelman
BACKGROUND: In a context of population ageing, it is a priority for planning and prevention to understand the socioeconomic (SE) patterning of functional limitations and its consequences on healthcare needs. This paper aims at measuring the gender and SE inequalities in functional limitations and their age of onset among the Southern European elderly; then, we evaluate how functional status is linked to formal and informal care use. METHODS: We used Portuguese, Italian and Spanish data from the Survey of Health, Ageing and Retirement in Europe (SHARE) of 2011 (n = 9233)...
October 3, 2017: International Journal for Equity in Health
https://www.readbyqxmd.com/read/28971529/a-novel-protein-therapeutic-joint-retention-strategy-based-on-collagen-binding-avimers
#15
Joanne T Hulme, Warren N D'Souza, Helen J McBride, Bo-Rin Park Yoon, Angela M Willee, Amy Duguay, Melissa Thomas, Bin Fan, Maria Rosalyn Dayao, James B Rottman, Kim Merriam, Jiansong Xie, Richard Smith, Benjamin M Alba, Ryan B Case, Khue Dang, Anielka Montalvan, Natalia Grinberg, Hong Sun, Roy A Black, Christopher A Gabel, John E Sims, Kevin Moore, Alice Bakker, Peng Li
Designing drugs to treat diseases associated with articular joints, particularly those targeting chondrocytes, is challenging due to unique local environmental constraints including the avascular nature of cartilage, the absence of a closed joint compartment, and a highly cross-linked extracellular matrix. In an effort to address these challenges, we developed a novel strategy to prolong residence time of intra-articularly administered protein therapeutics. Avimer domains are naturally found in membrane polypeptides and mediate diverse protein-protein interactions...
October 3, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28960868/mimicking-intermolecular-interactions-of-tight-protein-protein-complexes-for-small-molecule-antagonists
#16
David Xu, Khuchtumur Bum-Erdene, Yubing Si, Donghui Zhou, Mona K Ghozayel, Samy O Meroueh
Tight protein-protein interactions (Kd <100 nm) that occur over a large binding interface (>1000 Å(2) ) are highly challenging to disrupt with small molecules. Historically, the design of small molecules to inhibit protein-protein interactions has focused on mimicking the position of interface protein ligand side chains. Here, we explore mimicry of the pairwise intermolecular interactions of the native protein ligand with residues of the protein receptor to enrich commercial libraries for small-molecule inhibitors of tight protein-protein interactions...
September 27, 2017: ChemMedChem
https://www.readbyqxmd.com/read/28957753/structure-based-design-of-herg-neutral-antihypertensive-oxazalone-and-imidazolone-derivatives
#17
Busecan Aksoydan, Isik Kantarcioglu, Ismail Erol, Ramin Ekhteiari Salmas, Serdar Durdagi
Angiotensin II receptor type 1 (AT1) antagonists are the most recent drug class against hypertension. Recently first crystal structure of AT1 receptor is deposited to the protein data bank (PDB ID: 4YAY). In this work, several molecular screening methods such as molecular docking and de novo design studies were performed and it is found that oxazolone and imidazolone derivatives reveal similar/better interaction energy profiles compared to the FDA approved sartan molecules at the binding site of the AT1 receptor...
August 12, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28943861/a-practical-and-time-efficient-high-intensity-interval-training-program-modifies-cardio-metabolic-risk-factors-in-adults-with-risk-factors-for-type-ii-diabetes
#18
Bethan E Phillips, Benjamin M Kelly, Mats Lilja, Jesús Gustavo Ponce-González, Robert J Brogan, David L Morris, Thomas Gustafsson, William E Kraus, Philip J Atherton, Niels B J Vollaard, Olav Rooyackers, James A Timmons
INTRODUCTION: Regular physical activity (PA) can reduce the risk of developing type 2 diabetes, but adherence to time-orientated (150 min week(-1) or more) PA guidelines is very poor. A practical and time-efficient PA regime that was equally efficacious at controlling risk factors for cardio-metabolic disease is one solution to this problem. Herein, we evaluate a new time-efficient and genuinely practical high-intensity interval training (HIT) protocol in men and women with pre-existing risk factors for type 2 diabetes...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28930221/compounds-from-terminalia-mantaly-l-combretaceae-stem-bark-exhibit-potent-inhibition-against-some-pathogenic-yeasts-and-enzymes-of-metabolic-significance
#19
Marthe Aimée Tchuente Tchuenmogne, Thierry Ngouana Kammalac, Sebastian Gohlke, Rufin Marie Toghueo Kouipou, Abdulselam Aslan, Muslum Kuzu, Veysel Comakli, Ramazan Demirdag, Silvère Augustin Ngouela, Etienne Tsamo, Norbert Sewald, Bruno Ndjakou Lenta, Fabrice Fekam Boyom
Background: Pathogenic yeasts resistance to current drugs emphasizes the need for new, safe, and cost-effective drugs. Also, new inhibitors are needed to control the effects of enzymes that are implicated in metabolic dysfunctions such as cancer, obesity, and epilepsy. Methods: The anti-yeast extract from Terminalia mantaly (Combretaceae) was fractionated and the structures of the isolated compounds established by means of spectroscopic analysis and comparison with literature data. Activity was assessed against Candida albicans, C...
January 24, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28927768/synthesis-and-biological-evaluation-of-peptide-derived-tslp-inhibitors
#20
Seonghu Park, Yeeun Park, Sang-Hyun Son, Kiho Lee, Yong Woo Jung, Ki Yong Lee, Young Ho Jeon, Youngjoo Byun
Thymic stromal lymphopoietin (TSLP) is a type II cytokine which is associated with most inflammatory allergic disorders in humans. It is produced mainly by epithelial cells with important role in the development of chronic inflammatory diseases by activating T-helper cell type-2 (TH2) pathways. In this study, a total of 16 peptides were prepared by solid phase peptide synthesis based on amino acid sequences of the interface between TSLP and TSLP receptor. Their TSLP inhibition activities were determined by ELISA assay...
October 15, 2017: Bioorganic & Medicinal Chemistry Letters
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