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https://www.readbyqxmd.com/read/28822666/reliability-of-left-ventricular-ejection-fraction-from-three-dimensional-echocardiography-for-cardiotoxicity-onset-detection-in-patients-with-breast-cancer
#1
Cinzia Lorenzini, Claudio Lamberti, Michele Aquilina, Andrea Rocca, Pietro Cortesi, Cristiana Corsi
BACKGROUND: Cardiotoxicity is a well-known adverse effect of various chemotherapeutic agents that can be monitored by echocardiography. A decrease in left ventricular ejection fraction (LVEF) triggers consideration for therapy modification or interruption. The aim of this study was to evaluate how variability in LVEF estimates computed using three-dimensional echocardiography could influence cardiotoxicity onset detection. METHODS: One hundred eighty one patients with breast cancer treated with anthracycline and trastuzumab were analyzed...
August 16, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28820243/interpreting-reverse-transcriptase-termination-and-mutation-events-for-greater-insight-into-the-chemical-probing-of-rna
#2
Alec N Sexton, Peter Y Wang, Michael Rutenberg-Schoenberg, Matthew D Simon
Chemical probing has the power to provide insight into RNA conformation in vivo and in vitro, but interpreting the results depends on methods to detect the chemically modified nucleotides. Traditionally, the presence of modified bases was inferred from their ability to halt reverse transcriptase during primer extension and the locations of termination sites observed by electrophoresis or sequencing. More recently, modification-induced mutations have been used as a readout for chemical probing data. Given the variable propensity for mismatch incorporation and read-through with different reverse transcriptases, we examined how termination and mutation events compare to each other in the same chemical probing experiments...
August 18, 2017: Biochemistry
https://www.readbyqxmd.com/read/28817531/bias-confounding-and-interaction-lions-and-tigers-and-bears-oh-my
#3
Thomas R Vetter, Edward J Mascha
Epidemiologists seek to make a valid inference about the causal effect between an exposure and a disease in a specific population, using representative sample data from a specific population. Clinical researchers likewise seek to make a valid inference about the association between an intervention and outcome(s) in a specific population, based upon their randomly collected, representative sample data. Both do so by using the available data about the sample variable to make a valid estimate about its corresponding or underlying, but unknown population parameter...
September 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28802796/antibacterial-prophylaxis-for-gram-positive-and-gram-negative-infections-in-cranial-surgery-a-meta-analysis
#4
REVIEW
Pranav Abraham, Nayan Lamba, Michael Acosta, Joanna Gholmie, Hassan Y Dawood, Matthew Vestal, Kevin Huang, Maher Hulou, Morteza Asgarzadeh, Hasan Zaidi, Rania A Mekary, Timothy R Smith
BACKGROUND: Perioperative antibiotic prophylaxis against gram positive and gram negative infections is considered standard of care in the perioperative management of patients undergoing cranial surgery. The antibiotic regimen which best reduces the risk of surgical site infections (SSIs) remains controversial. OBJECTIVES: A systematic literature review and meta-analysis were conducted to examine the effect of various prophylactic antibiotics on infection incidence among patients undergoing cranial surgeries...
August 9, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28801655/%C3%AE-1-adrenergic-receptor-o-glycosylation-regulates-n-terminal-cleavage-and-signaling-responses-in-cardiomyocytes
#5
Misun Park, Gopireddy R Reddy, Gerd Wallukat, Yang K Xiang, Susan F Steinberg
β1-adrenergic receptors (β1ARs) mediate catecholamine actions in cardiomyocytes by coupling to both Gs/cAMP-dependent and Gs-independent/growth-regulatory pathways. Structural studies of the β1AR define ligand-binding sites in the transmembrane helices and effector docking sites at the intracellular surface of the β1AR, but the extracellular N-terminus, which is a target for post-translational modifications, typically is ignored. This study identifies β1AR N-terminal O-glycosylation at Ser(37)/Ser(41) as a mechanism that prevents β1AR N-terminal cleavage...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28798160/protein-coalation-a-redox-linked-post-translational-modification
#6
Steven C Ley, Luiz Pedro S de Carvalho
Regulation of metabolic pathways by signal transduction and transcriptional cascades can alter cellular levels of metabolites. Metabolites themselves can also have regulatory activity as shown in a new study published in the Biochemical Journal Tsuchiya et al. describe a novel antibody and mass spectrometry-based method for identifying proteins that are reversibly modified with Coenzyme A (CoA). Analysis of the 'CoAlated proteome' under conditions of oxidative and metabolic stress revealed a bias towards the modification of metabolic enzymes by CoA...
August 10, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28783620/reducing-sensor-noise-in-meg-and-eeg-recordings-using-oversampled-temporal-projection
#7
Eric Larson, Samu Taulu
Here we review the theory of suppression of spatially uncorrelated, sensor-specific noise in electro- and magento-encephalography (EEG and MEG) arrays, and introduce a novel method for suppression. Our method requires only that the signals of interest are spatially oversampled by the sensor array, which is a reasonable assumption for many EEG and MEG systems. Our method is based on a leave-one-out procedure using overlapping temporal windows in a mathematical framework to project spatially uncorrelated noise in the temporal domain...
July 31, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28780370/prevention-of-type-2-diabetes-with-the-traditional-chinese-patent-medicine-a-systematic-review-and-meta-analysis
#8
REVIEW
Bing Pang, Feng-Mei Lian, Xi-Yan Zhao, Xue-Min Zhao, De Jin, Yi-Qun Lin, Yu-Jiao Zheng, Qing Ni, Xiao-Lin Tong
AIM: Early interventions in prediabetes can prevent or delay the incidence of type 2 diabetes mellitus (T2DM). The aim of this review was to assess the efficacy and safety of traditional Chinese patent medicine (TCPM) on the prevention of T2DM. METHODS: Seven electronic databases were searched to identify eligible trials published until June 1, 2016. Randomized controlled trials (RCTs) that compared TCPM plus lifestyle modification (LM) versus LM alone were included for in the...
July 19, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28777690/development-and-validation-of-nomograms-predictive-of-overall-and-progression-free-survival-in-patients-with-oropharyngeal-cancer
#9
Carole Fakhry, Qiang Zhang, Phuc Felix Nguyen-Tân, David I Rosenthal, Randal S Weber, Louise Lambert, Andy M Trotti, William L Barrett, Wade L Thorstad, Christopher U Jones, Sue S Yom, Stuart J Wong, John A Ridge, Shyam S D Rao, James A Bonner, Eric Vigneault, David Raben, Mahesh R Kudrimoti, Jonathan Harris, Quynh-Thu Le, Maura L Gillison
Purpose Treatment of oropharyngeal squamous cell carcinoma (OPSCC) is evolving toward risk-based modification of therapeutic intensity, which requires patient-specific estimates of overall survival (OS) and progression-free survival (PFS). Methods To develop and validate nomograms for OS and PFS, we used a derivation cohort of 493 patients with OPSCC with known p16 tumor status (surrogate of human papillomavirus) and cigarette smoking history (pack-years) randomly assigned to clinical trials using platinum-based chemoradiotherapy (NRG Oncology Radiation Therapy Oncology Group [RTOG] 0129 and 0522)...
August 4, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28771318/bias-controlled-optical-transitions-in-gan-aln-nanowire-heterostructures
#10
Jan Müßener, Pascal Hille, Tim Grieb, Jörg Schörmann, Jörg Teubert, Eva Monroy, Andreas Rosenauer, Martin Eickhoff
We report on the control and modification of optical transitions in 40× GaN/AlN heterostructure superlattices embedded in GaN nanowires by an externally applied bias. The complex band profile of these multi-nanodisc heterostructures gives rise to a manifold of optical transitions, whose emission characteristic is strongly influenced by polarization-induced internal electric fields. We demonstrate that the superposition of an external axial electric field along a single contacted nanowire leads to specific modifications of each photoluminescence emission, which allows to investigate and identify their origin and to control their characteristic properties in terms of transition energy, intensity and decay time...
August 14, 2017: ACS Nano
https://www.readbyqxmd.com/read/28766908/building-essential-biodiversity-variables-ebvs-of-species-distribution-and-abundance-at-a-global-scale
#11
W Daniel Kissling, Jorge A Ahumada, Anne Bowser, Miguel Fernandez, Néstor Fernández, Enrique Alonso García, Robert P Guralnick, Nick J B Isaac, Steve Kelling, Wouter Los, Louise McRae, Jean-Baptiste Mihoub, Matthias Obst, Monica Santamaria, Andrew K Skidmore, Kristen J Williams, Donat Agosti, Daniel Amariles, Christos Arvanitidis, Lucy Bastin, Francesca De Leo, Willi Egloff, Jane Elith, Donald Hobern, David Martin, Henrique M Pereira, Graziano Pesole, Johannes Peterseil, Hannu Saarenmaa, Dmitry Schigel, Dirk S Schmeller, Nicola Segata, Eren Turak, Paul F Uhlir, Brian Wee, Alex R Hardisty
Much biodiversity data is collected worldwide, but it remains challenging to assemble the scattered knowledge for assessing biodiversity status and trends. The concept of Essential Biodiversity Variables (EBVs) was introduced to structure biodiversity monitoring globally, and to harmonize and standardize biodiversity data from disparate sources to capture a minimum set of critical variables required to study, report and manage biodiversity change. Here, we assess the challenges of a 'Big Data' approach to building global EBV data products across taxa and spatiotemporal scales, focusing on species distribution and abundance...
August 2, 2017: Biological Reviews of the Cambridge Philosophical Society
https://www.readbyqxmd.com/read/28763688/prediction-of-lysine-propionylation-sites-using-biased-svm-and-incorporating-four-different-sequence-features-into-chou-s-pseaac
#12
Zhe Ju, Jian-Jun He
Lysine propionylation is an important and common protein acylation modification in both prokaryotes and eukaryotes. To better understand the molecular mechanism of propionylation, it is important to identify propionylated substrates and their corresponding propionylation sites accurately. In this study, a novel bioinformatics tool named PropPred is developed to predict propionylation sites by using multiple feature extraction and biased support vector machine. On the one hand, various features are incorporated, including amino acid composition, amino acid factors, binary encoding, and the composition of k-spaced amino acid pairs...
July 25, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28763628/the-value-of-18f-fdg-pet-ct-imaging-in-breast-cancer-staging
#13
Ulkem Yararbas, Neslihan Çetin, Levent Yeniay, Aziz Murat Argon
The National Comprehensive Cancer Network (NCCN) guidelines recommend assessment with positron emission tomography with 2-deoxy-2-[fluorine-18]fluoro- D-glucose integrated with computed tomography (18F-FDG PET/CT) in staging of breast cancer, starting from the stage IIIA. Previously, PET/CT contributed to the accurate staging from the stage IIB. Our aim is to evaluate the contribution of 18F-FDG PET/CT in staging of breast cancer patients. A total of 234 patients were retrospectively evaluated. PET/CT was performed preoperatively in 114/234 and postoperatively in 120/234 patients...
August 1, 2017: Bosnian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28761689/efficacy-of-dietary-and-physical-activity-intervention-in-non-alcoholic-fatty-liver-disease-a-systematic-review
#14
Susan Kenneally, Joanna H Sier, J Bernadette Moore
BACKGROUND: Non-alcoholic fatty liver disease (NAFLD) is the most common cause of chronic liver disease worldwide, with prevalence above 30% in many adult populations. Strongly associated with obesity, weight loss through diet and physical activity is the mainstay of its management. Weight loss can be difficult to achieve and maintain however, and uncertainty exists as to which lifestyle changes are most effective. OBJECTIVE: The aim of this work was to systematically evaluate randomised controlled trials assessing diet, exercise or combination interventions aimed at reducing steatosis or markers of NAFLD activity...
2017: BMJ Open Gastroenterology
https://www.readbyqxmd.com/read/28759865/cognitive-bias-modification-a-review-of-meta-analyses
#15
REVIEW
Emma B Jones, Louise Sharpe
BACKGROUND: Cognitive bias modification (CBM) is a novel, but controversial intervention with considerable divergence amongst conclusions in individual studies and reviews. This systematic review synthesizes meta-analyses of CBM to determine whether CBM is effective, and what parameters most reliably evoke the process of CBM. METHODS: A systematic literature search resulted in twelve meta-analyses in total, from which the published effect sizes were extracted. RESULTS: Attention bias modification (ABM) shifted targeted biases in adults (ES = 0...
July 18, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28759091/fundamentals-for-an-osteopathic-obesity-designed-study-the-effects-of-education-on-osteopathic-medical-students-attitudes-regarding-obesity
#16
Gregory G Gayer, Jennifer Weiss, Michael Clearfield
Context: Obesity is a major health concern in the United States, and its prevalence continues to rise. Although it is a common health issue, many people, including health care professionals, are biased against people with obesity. Objective: To determine whether a comprehensive obesity curriculum presented to students in medical school can positively influence their attitudes toward obesity. Methods: The study was designed around a comprehensive educational obesity curriculum at Touro University College of Osteopathic Medicine-CA, involving the classes of 2013 through 2018...
August 1, 2017: Journal of the American Osteopathic Association
https://www.readbyqxmd.com/read/28755565/automatic-plume-episode-identification-and-cloud-shine-reconstruction-method-for-ambient-gamma-dose-rates-during-nuclear-accidents
#17
Xiaole Zhang, Wolfgang Raskob, Claudia Landman, Dmytro Trybushnyi, Christoph Haller, Hongyong Yuan
Ambient gamma dose rate (GDR) is the primary observation quantity for nuclear emergency management due to its high acquisition frequency and dense spatial deployment. However, ambient GDR is the sum of both cloud and ground shine, which hinders its effective utilization. In this study, an automatic method is proposed to identify the radioactive plume passage and to separate the cloud and ground shine in the total GDR. The new method is evaluated against a synthetic GDR dataset generated by JRODOS (Real Time On-line Decision Support) System and compared with another method (Hirayama, H...
July 26, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28752017/attention-bias-modification-abm-review-of-effects-of-multisession-abm-training-on-anxiety-and-threat-related-attention-in-high-anxious-individuals
#18
REVIEW
Karin Mogg, Allison M Waters, Brendan P Bradley
Attention bias modification (ABM) aims to reduce anxiety by reducing attention bias (AB) to threat; however, effects on anxiety and AB are variable. This review examines 34 studies assessing effects of multisession-ABM on both anxiety and AB in high-anxious individuals. Methods include ABM-threat-avoidance (promoting attention-orienting away from threat), ABM-positive-search (promoting explicit, goal-directed attention-search for positive/nonthreat targets among negative/threat distractors), and comparison conditions (e...
July 2017: Clinical Psychological Science
https://www.readbyqxmd.com/read/28750481/aqueous-shunts-for-glaucoma
#19
REVIEW
Victoria L Tseng, Anne L Coleman, Melinda Y Chang, Joseph Caprioli
BACKGROUND: Aqueous shunts are employed to control intraocular pressure (IOP) for people with primary or secondary glaucomas who fail or are not candidates for standard surgery. OBJECTIVES: To assess the effectiveness and safety of aqueous shunts for reducing IOP in glaucoma compared with standard surgery, another type of aqueous shunt, or modification to the aqueous shunt procedure. SEARCH METHODS: We searched CENTRAL (which contains the Cochrane Eyes and Vision Trials Register) (2016, Issue 8), MEDLINE Ovid (1946 to August 2016), Embase...
July 28, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28748774/exposure-to-parental-psychopathology-and-offspring-s-risk-of-suicide-related-thoughts-and-behaviours-a-systematic-review
#20
S M Goodday, J Shuldiner, S Bondy, A E Rhodes
AIMS: The primary objective of this systematic review was to identify and synthesise analytic studies examining the association between exposure to parental psychopathology in childhood and the nature of subsequent suicide-related thoughts (SRT) and suicide-related behaviour (SRB) (severity of ideation, planned/unplanned attempts/lethality) and to describe the direction, and magnitude of associations. The secondary objective was to determine if the associations from the primary objective differ by the type(s) and timing of parental psychopathology, sex/gender of the parent and child and is mediated by child psychiatric symptoms and family functioning...
July 27, 2017: Epidemiology and Psychiatric Sciences
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