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https://www.readbyqxmd.com/read/29689359/arsenic-speciation-in-food-in-belgium-part-2-cereals-and-cereal-products
#1
A Ruttens, K Cheyns, A C Blanpain, L De Temmerman, N Waegeneers
This study reports results of total arsenic (Astot ) and various As species in 75 samples of cereals and cereal products bought on the Belgian market in 2009. In addition to rice, the samples were wheat, pasta, bread and some breakfast cereals. The inorganic species arsenite (AsIII ) and arsenate (AsV ), and the organic As compounds dimethyl arsinate (DMA) and monomethyl arsonate (MA) were the only As species detected. Mean Astot was 0.150 ± 0.089 mg kg-1 in rice and 0.012 ± 0.008 mg kg- in the non-rice cereals...
April 21, 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29679891/removal-of-arsenic-and-mercury-species-from-water-by-covalent-triazine-framework-encapsulated-%C3%AE-fe-2-o-3-nanoparticles
#2
Karen Leus, Karel Folens, Nina Ricci Nicomel, Jeffrey Paulo H Perez, Maria Filippousi, Maria Meledina, Marinela M Dîrtu, Stuart Turner, Gustaaf Van Tendeloo, Yann Garcia, Gijs Du Laing, Pascal Van Der Voort
The covalent triazine framework, CTF-1, served as host material for the in situ synthesis of Fe2 O3 nanoparticles. The composite material consisted of 20 ± 2 m% iron, mainly in γ-Fe2 O3 phase. The resulting γ-Fe2 O3 @CTF-1 was examined for the adsorption of AsIII , AsV and HgII from synthetic solutions and real surface-, ground- and wastewater. The material shows excellent removal efficiencies, independent from the presence of Ca2+ , Mg2+ or natural organic matter and only limited dependency on the presence of phosphate ions...
April 16, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29678531/-restructuring-of-medical-specialist-treatment-using-the-example-of-ambulatory-special-medical-care-asv-taking-a-critical-look-at-its-aims-and-implementation
#3
REVIEW
Robert Dengler, Manfred Cassens
With the GKV-VStG act in 2012, the former section 116b SGB V was transformed into ambulatory special medical care (ASV). This system comprises the diagnosis and therapy of rare or complex diseases which are difficult to treat, in need of a special qualification of doctors, an interdisciplinary cooperation and/or special facilities. For the first time, a uniform regulatory framework was established for the participation of office- as well as hospital-based doctors in ambulatory care. There is no planning of demand or licensed permission...
April 18, 2018: Zeitschrift Für Evidenz, Fortbildung und Qualität Im Gesundheitswesen
https://www.readbyqxmd.com/read/29619408/common-sense-in-choice-the-effect-of-sensory-modality-on-neural-value-representations
#4
Anastasia Shuster, Dino J Levy
Although it is well established that the ventromedial prefrontal cortex (vmPFC) represents value using a common currency across categories of rewards, it is unknown whether the vmPFC represents value irrespective of the sensory modality in which alternatives are presented. In the current study, male and female human subjects completed a decision-making task while their neural activity was recorded using functional magnetic resonance imaging. On each trial, subjects chose between a safe alternative and a lottery, which was presented visually or aurally...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29616491/management-of-sleep-disordered-breathing-in-patients-with-heart-failure
#5
REVIEW
Connor P Oates, Manjula Ananthram, Stephen S Gottlieb
PURPOSE OF REVIEW: This paper reviews treatment options for sleep disordered breathing (SDB) in patients with heart failure. We sought to identify therapies for SDB with the best evidence for long-term use in patients with heart failure and to minimize uncertainties in clinical practice by examining frequently discussed questions: what is the role of continuous positive airway pressure (CPAP) in patients with heart failure? Is adaptive servo-ventilation (ASV) safe in patients with heart failure? To what extent is SDB a modifiable risk factor? RECENT FINDINGS: Consistent evidence has demonstrated that the development of SDB in patients with heart failure is a poor prognostic indicator and a risk factor for cardiovascular mortality...
April 3, 2018: Current Heart Failure Reports
https://www.readbyqxmd.com/read/29589331/population-pharmacokinetic-analysis-of-asunaprevir-in-subjects-with-hepatitis-c-virus-infection
#6
Li Zhu, Hanbin Li, Phyllis Chan, Timothy Eley, Yash Gandhi, Marc Bifano, Mayu Osawa, Takayo Ueno, Eric Hughes, Malaz AbuTarif, Richard Bertz, Tushar Garimella
INTRODUCTION: Asunaprevir (ASV) is a potent, pangenotypic, twice-daily hepatitis C virus (HCV) NS3 inhibitor indicated for the treatment of chronic HCV infection. METHODS: A population pharmacokinetic (PPK) model was developed using pooled ASV concentration data from 1239 HCV-infected subjects who received ASV either as part of the DUAL regimen with daclatasvir or as part of the QUAD regimen with daclatasvir and peg-interferon/ribavirin. RESULTS: A two-compartment model with first-order elimination from the central compartment, an induction effect on clearance, and an absorption model consisted of zero-order release followed by first-order absorption adequately described ASV PK after oral administration...
March 27, 2018: Infectious Diseases and Therapy
https://www.readbyqxmd.com/read/29577277/alternative-splice-variants-of-dclk1-mark-cancer-stem-cells-promote-self-renewal-and-drug-resistance-and-can-be-targeted-to-inhibit-tumorigenesis-in-kidney-cancer
#7
Yang Ge, Nathaniel Weygant, Dongfeng Qu, Randal May, William L Berry, Jiannan Yao, Parthasarathy Chandrakesan, Wei Zheng, Lichao Zhao, Karena L Zhao, Michael Drake, Kenneth J Vega, Michael S Bronze, James J Tomasek, Guangyu An, Courtney W Houchen
Renal cell carcinoma (RCC) is a common and devastating disease characterized by a hypoxic microenvironment, epithelial-mesenchymal transition, and potent resistance to therapy evidencing the presence of cancer stem cells (CSCs). Various CSC markers have been studied in RCC, but overall there is limited data on their role and most markers studied have been relatively non-specific. Doublecortin-like kinase 1 (DCLK1) is a validated CSC marker in the gastrointestinal tract and evidence for an equivalent role in other cancers is accumulating...
March 25, 2018: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29575522/phosphate-starvation-response-controls-genes-required-to-synthesize-the-phosphate-analog-arsenate
#8
Qian Wang, Yoon-Suk Kang, Abdullah Alowaifeer, Kaixiang Shi, Xia Fan, Lu Wang, Jonathan Jetter, Brian Bothner, Gejiao Wang, Timothy R McDermott
Environmental arsenic poisoning affects roughly 200 million people worldwide. The toxicity and mobility of arsenic in the environment is significantly influenced by microbial redox reactions, with arsenite (AsIII ) being more toxic than arsenate (AsV ). Microbial oxidation of AsIII to AsV is known to be regulated by the AioXSR signal transduction system and viewed to function for detoxification or energy generation. Here we show that AsIII oxidation is ultimately regulated by the phosphate starvation response (PSR), requiring the sensor kinase PhoR for expression of the AsIII oxidase structural genes aioBA...
March 25, 2018: Environmental Microbiology
https://www.readbyqxmd.com/read/29568980/sleep-apnea-in-heart-failure
#9
REVIEW
MuChun Tsai, Rami Khayat
PURPOSE OF REVIEW: In this review, we discuss the current treatment options for sleep-disordered breathing (SDB) in patients with heart failure (HF). We address the role of positive airway pressure (PAP) devices and other emerging therapies. The review includes discussion of recent trials that reported negative consequences for the PAP devices in patients with heart failure. RECENT FINDINGS: Optimal guideline-directed medical therapies of HF and PAP devices have been the mainstay treatments for HF patients with SDB...
March 22, 2018: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29567188/arsenic-speciation-in-tree-moss-by-mass-spectrometry-based-hyphenated-techniques
#10
Kai Nan, Man He, Beibei Chen, Yujie Chen, Bin Hu
A method based on ion-pair reversed phase high performance liquid chromatography (HPLC) hyphenated with inductively coupled plasma mass spectrometry (ICP-MS) was developed for arsenic speciation in extract of tree moss. Under the optimal conditions, the limit of detection of eight arsenic species including arsenite (AsIII ), arsenate (AsV ), monomethylarsonic acid (MMA), dimethylarsonic acid (DMA), trimethylarsinoxide (TMAO), tetramethylarsonium (Tetra), arsenocholine (AsC) and arsenobetaine (AsB) is between 0...
June 1, 2018: Talanta
https://www.readbyqxmd.com/read/29539263/phosphate-transporter-pvpht1-2-enhances-phosphorus-accumulation-and-plant-growth-without-impacting-arsenic-uptake-in-plants
#11
Yue Cao, Dan Sun, Jun-Xiu Chen, Hanyi Mei, Hao Ai, Guohua Xu, Yanshan Chen, Lena Q Ma
Phosphorus is an important nutrient for plant growth and is acquired by plants mainly as phosphate (P). Phosphate transporters (Phts) are responsible for P and arsenate (AsV) uptake in plants including arsenic (As) hyperaccumulator Pteris vittata. It is efficient in AsV uptake and P utilization, but P uptake in P. vittata is largely unknown. In this study, a P. vittata Pht, PvPht1;2, was identified and cloned. After transforming it into tobacco (N. tabacum), three independent transgenic lines (Ox1, Ox10, and Ox21) were studied...
March 14, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29526929/chronic-hepatitis-c-treatment-with-daclatasvir-plus-asunaprevir-does-not-lead-to-a-decreased-quality-of-life
#12
Megumi Kawakubo, Yuichiro Eguchi, Michiaki Okada, Shinji Iwane, Satoshi Oeda, Taiga Otsuka, Syunya Nakashita, Norimasa Araki, Akemi Koga
Objective The aim of this study was to determine if direct-acting antiviral (DAA) treatment with daclatasvir (DCV) plus asunaprevir (ASV) for 24 weeks influenced the health-related quality of life (HRQOL) at 12 and 24 weeks after treatment initiation (end of treatment [EOT]). Methods This was a prospective, longitudinal study comparing the HRQOL of patients receiving DAA treatment at 12 weeks after treatment initiation and EOT with the HRQOL at baseline. We used a Japanese-validated version of the 8-item Short Form Health Survey (SF-8) to assess the HRQOL of patients...
March 9, 2018: Internal Medicine
https://www.readbyqxmd.com/read/29504692/efficacy-of-ledipasvir-sofosbuvir-with-or-without-ribavirin-for-12-weeks-in-genotype-1b-hcv-patients-previously-treated-with-a-nonstructural-protein-5a-inhibitor-containing-regimen
#13
Hiroki Ikeda, Tsunamasa Watanabe, Hirohito Shimizu, Tetsuya Hiraishi, Rena Kaneko, Toshiyuki Baba, Hideaki Takahashi, Kotaro Matsunaga, Nobuyuki Matsumoto, Hiroshi Yasuda, Chiaki Okuse, Shogo Iwabuchi, Michihiro Suzuki, Fumio Itoh
AIM: The therapeutic benefit of adding ribavirin (RBV) to 12 weeks of ledipasvir/sofosbuvir (LDV/SOF) for patients who experienced failure of a previous nonstructural protein (NS) 5A inhibitor-containing regimen is unclear. METHODS: A total of 29 genotype 1b HCV patients who had failed prior daclatasvir (DCV) plus asunaprevir (ASV) treatment were retreated for 12 weeks of LDV/SOF, with or without RBV. Antiviral efficacy and predictive factors associating with a sustained virological response at 24 weeks (SVR24) were evaluated retrospectively...
March 5, 2018: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/29488373/direct-observation-of-simultaneous-immobilization-of-cadmium-and-arsenate-v-at-the-brushite-interface
#14
Hang Zhai, Lijun Wang, Lihong Qin, Wenjun Zhang, Christine V Putnis, Andrew Putnis
Cadmium (Cd) and Arsenate (AsV+) are the main toxic elements in soil environments and are easily taken up by plants. Unraveling the kinetics of the adsorption and subsequent precipitation/immobilization on mineral surfaces is of considerable importance for predicting the fate of these dissolved species in soils. Here we used in situ atomic force microscopy (AFM) to image the dissolution on the (010) face of brushite (dicalcium phosphate dihydrate, CaHPO4·2H2O) in CdCl2- or Na2HAsO4-bearing solutions over a broad pH and concentration range...
February 28, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29477124/silver-dendrimer-nanocomposites-as-oligonucleotide-labels-for-electrochemical-stripping-detection-of-dna-hybridization
#15
Xin Jin, Ling Zhou, Bo Zhu, Xue Jiang, Ningning Zhu
Silver-dendrimer nanocomposites were synthesized and used as oligonucleotide labels for electrochemical stripping detection of DNA hybridization. The synthesized silver-dendrimer nanocomposites were characterized by UV-vis spectrophotometry, X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). Ratios of silver/dendrimer were optimized in order to obtain stable nanocomposites with maximal silver loading in the interior of a polymeric shell. The silver-dendrimer nanocomposites were attached to sequence-known DNA probes specific to colitoxin, and used to detect probe hybridization by dissolution of the silver nanoparticles in the interior of dendrimer in a diluted nitric acid, followed by measurement of Ag+ ions by anodic stripping voltammetry (ASV)...
June 1, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29471442/estimation-of-adaptive-ventilation-success-and-failure-using-polysomnogram-and-outpatient-therapy-biomarkers
#16
Stacey Gunn, Sreelatha Naik, Matt Travis Bianchi, Robert Joseph Thomas
Study Objectives: Adaptive servo ventilation (ASV) devices provide anti-cyclic pressure support for treatment of central/complex sleep apnea, including in heart failure patients. Variability in responses in the clinic and negative clinical trials motivated assessment of standard and novel signal biomarkers for ASV efficacy. Methods: Multiple clinical databases were queried to assess potential signal biomarkers of ASV effectiveness, including 1) Attended laboratory adaptive ventilation titrations: 108, of which 66 had mainstream ETCO2 measurements...
February 17, 2018: Sleep
https://www.readbyqxmd.com/read/29458746/stridor-combined-with-other-sleep-breathing-disorders-in-multiple-system-atrophy-a-tailored-treatment
#17
Saleheddine Rekik, Francis Martin, Pauline Dodet, Stefania Redolfi, Smaranda Leu-Semenescu, Jean-Christophe Corvol, David Grabli, Isabelle Arnulf
OBJECTIVES: To determine the frequency of sleep breathing disorders in multiple systemic atrophy (MSA, combining Parkinsonism, cerebellar syndrome, and dysautonomia) and evaluate the benefit/tolerance of various modes of ventilation. METHODS: We retrospectively analyzed 45 patients with MSA having undergone a videopolysomnography. Their sleep characteristics were compared to those of 45 patients with Parkinson's disease and 45 healthy controls, matched for age and sex...
February 2018: Sleep Medicine
https://www.readbyqxmd.com/read/29430653/regression-equations-for-calculation-of-z-scores-for-echocardiographic-measurements-of-left-heart-structures-in-healthy-han-chinese-children
#18
Shan-Shan Wang, Wen-Jing Hong, Yu-Qi Zhang, Shu-Bao Chen, Guo-Ying Huang, Hong-Yan Zhang, Li-Jun Chen, Lan-Ping Wu, Rong Shen, Yi-Qing Liu, Jun-Xue Zhu
OBJECTIVE: Clinical decision making in children with heart disease relies on detailed measurements of cardiac structures using two-dimensional and M-mode echocardiography. However, no echocardiographic reference values are available for the Chinese children. We aimed to establish z-score regression equations for left heart structures in a population-based cohort of healthy Chinese Han children. METHOD: Echocardiography was performed in 545 children with a normal heart...
February 12, 2018: Journal of Clinical Ultrasound: JCU
https://www.readbyqxmd.com/read/29422192/biochars-induced-modification-of-dissolved-organic-matter-dom-in-soil-and-its-impact-on-mobility-and-bioaccumulation-of-arsenic-and-cadmium
#19
Gang Li, Sardar Khan, Muhammad Ibrahim, Tian-Ran Sun, Jian-Feng Tang, James B Cotner, Yao-Yang Xu
Biochar application has attracted great attention due to its diverse uses and benefits in the fields of environmental management and agriculture. Biochar modifies the composition of dissolved organic matter (DOM) in soil, which directly or indirectly controls the mobility of metal contaminants and their bioaccumulation. In this study, ten different hydrothermal biochars pyrolysed from mushroom waste (MSBC), soybean straw (SBBC), sewage sludge (SSBC), peanut shells (PNBC) and rice straw (RSBC) at two pyrolysis temperatures (200 °C and 350 °C) were used to investigate DOM changes in soil solution and their effects on metal availability and bioaccumulation...
April 15, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29411336/central-sleep-apnea-with-cheyne-stokes-breathing-in-heart-failure-from-research-to-clinical-practice-and-beyond
#20
K Terziyski, A Draganova
Characterized by periodic crescendo-decrescendo pattern of breathing alternating with central apneas, Central sleep apnea (CSA) with Cheyne-Stokes Breathing represents a highly prevalent, yet underdiagnosed comorbidity in chronic heart failure (CHF). A diverse body of evidence demonstrates increased morbidity and mortality in the presence of CSB. CSB has been described in both CHF patients with preserved and reduced ejection fraction, regardless of drug treatment. Risk factors for CSB are older age, male gender, high BMI, atrial fibrillation and hypocapnia...
February 7, 2018: Advances in Experimental Medicine and Biology
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