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https://www.readbyqxmd.com/read/28934352/global-reaction-to-the-recent-outbreaks-of-zika-virus-insights-from-a-big-data-analysis
#1
Nicola Luigi Bragazzi, Cristiano Alicino, Cecilia Trucchi, Chiara Paganino, Ilaria Barberis, Mariano Martini, Laura Sticchi, Eugen Trinka, Francesco Brigo, Filippo Ansaldi, Giancarlo Icardi, Andrea Orsi
OBJECTIVE: The recent spreading of Zika virus represents an emerging global health threat. As such, it is attracting public interest worldwide, generating a great amount of related Internet searches and social media interactions. The aim of this research was to understand Zika-related digital behavior throughout the epidemic spreading and to assess its consistence with real-world epidemiological data, using a behavioral informatics and analytics approach. METHODS: In this study, the global web-interest and reaction to the recently occurred outbreaks of the Zika Virus were analyzed in terms of tweets and Google Trends (GT), Google News, YouTube, and Wikipedia search queries...
2017: PloS One
https://www.readbyqxmd.com/read/28934031/simultaneous-detection-of-15-antibiotic-growth-promoters-in-bovine-muscle%C3%AF-blood-and-urine-by-uplc-ms-ms
#2
Zhi Wang, Zongwei Shi, Cunxian Xi, Guomin Wang, Shurui Cao, Lei Zhang, Bobin Tang, Zhaode Mu
An analytical method was established for the rapid detection of antibiotic growth promoters (AGPs) in bovine muscle, and bovine blood and bovine urine, using ultra high performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS). After the addition of an aqueous solution of EDTA-Na2, the pH of bovine urine samples was directly adjusted to 5.2 by acetic acid-ammonium acetate and purified by HLB solid-phase extraction cartridge; bovine muscle and bovine blood samples processing were extracted with acetonitrile (ACN) and ACN-water (90:10; v/v) without any purification step...
September 21, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28934012/liquid-chromatography-tandem-mass-spectrometry-method-for-simultaneous-quantification-of-azoxystrobin-and-its-metabolites-azoxystrobin-free-acid-and-2-hydroxybenzonitrile-in-greenhouse-grown-lettuce
#3
Maheswor Gautam, Inge S Fomsgaard
Lettuce is an important part of the diet in Europe. The permitted levels of pesticides in lettuce are strictly regulated and there is growing urge among food safety authorities to analyse pesticide metabolites as well. Azoxystrobin is one of pesticides that is frequently detected in lettuce. Although there are several analytical methods for the determination of azoxystrobin in lettuce, a sensitive method for the determination of its metabolites in lettuce is lacking. This study aimed at developing an extraction and LC-MS/MS method for the simultaneous determination of azoxystrobin, and its metabolites azoxystrobin free acid and 2-hydroxybenzonitrile in lettuce...
September 21, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28933756/a-disposable-amperometric-sensor-based-on-high-performance-pedot-pss-ionic-liquid-nanocomposite-thin-film-modified-screen-printed-electrode-for-the-analysis-of-catechol-in-natural-water-samples
#4
Francis D Krampa, Yaw Aniweh, Gordon A Awandare, Prosper Kanyong
A conducting polymer-based composite material of poly(3,4-ethylenedioxythiophene) (PEDOT): poly(4-styrenesulfonate) (PSS) doped with different percentages of a room temperature ionic liquid (IL), 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][BF₄]), was prepared and a very small amount of the composite (2.0 µL) was drop-coated on the working area of a screen-printed carbon electrode (SPCE). The SPCE, modified with PEDOT:PSS/IL composite thin-film, was characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), profilometry and sessile contact angle measurements...
July 26, 2017: Sensors
https://www.readbyqxmd.com/read/28933679/thyroid-hormone-stimulates-the-onset-of-adult-feeding-kinematics-in-zebrafish
#5
Sarah McMenamin, Casey Carter, Wiliam James Cooper
The physical demands for swimming and feeding change dramatically over the course of development for many aquatic animals. Indeed, in teleosts, the transition from larva to adult involves major shifts in both trophic morphology and feeding behavior. A spike in thyroid hormone (TH) coordinates many developmental processes that occur during this adult transition in numerous vertebrate species. Using mutant and transgenic zebrafish, we tested the hypothesis that TH is essential for the transition from larval to adult feeding kinematic profiles...
September 21, 2017: Zebrafish
https://www.readbyqxmd.com/read/28933114/-simultaneous-determination-of-12-mycotoxins-in-polygoni-multiflori-radix-by-uplc-esi-ms-ms-combined-with-modified-quechers
#6
Chun Li, Xiao Su, Wei-Hong Feng, Rao-Rao Li, Xiao-Qian Liu, Peng-Yue Li, Zhi-Min Wang
To investigate the cause of liver toxicity induced by Polygoni Multiflori Radix through determining various mycotoxins in it. An UPLC-ESI-MS/MS method was developed and established to simultaneously determine 12 mycotoxins, Aflatoxins B₁, B₂, G₁, G₂, Ochratoxins A and B, Fumonisins B₁ and B₂,T-2 toxin, HT-2 toxin, Deoxynivalenol and Zearalenone, in rawand processed Polygon iMultiflori Radix. The sample was extracted with modified QuEChERS method, and then was separatedon a WelchUltimate XBC₁₈ column by gradient elution using methanol and 2 mmol•L⁻¹ ammonium acetate aqueous solution containing 0...
December 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28932958/sensitive-determination-of-cadmium-using-solidified-floating-organic-drop-microextraction-slotted-quartz-tube-flame-atomic-absorption-spectroscopy
#7
Erhan Akkaya, Dotse Selali Chormey, Sezgin Bakırdere
In this study, solidified floating organic drop microextraction (SFODME) by 1-undecanol was combined with slotted quartz tube flame atomic absorption spectrometry (SQT-FAAS) for the determination of cadmium at trace levels. Formation of a complex with 4,4'-dimethyl-2,2'-bipyridine facilitated the extraction of cadmium from aqueous solutions. Several chemical variables were optimized in order to obtain high extraction outputs. Parameters such as concentration of the ligand, pH, and amount of buffer solution were optimized to enhance the formation of cadmium complex...
September 20, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28932815/a-multicenter-study-to-evaluate-the-performance-of-high-throughput-sequencing-for-virus-detection
#8
Arifa S Khan, Siemon H S Ng, Olivier Vandeputte, Aisha Aljanahi, Avisek Deyati, Jean-Pol Cassart, Robert L Charlebois, Lanyn P Taliaferro
The capability of high-throughput sequencing (HTS) for detection of known and unknown viruses makes it a powerful tool for broad microbial investigations, such as evaluation of novel cell substrates that may be used for the development of new biological products. However, like any new assay, regulatory applications of HTS need method standardization. Therefore, our three laboratories initiated a study to evaluate performance of HTS for potential detection of viral adventitious agents by spiking model viruses in different cellular matrices to mimic putative materials for manufacturing of biologics...
September 2017: MSphere
https://www.readbyqxmd.com/read/28932809/aberrant-cortical-activity-in-multiple-gcamp6-expressing-transgenic-mouse-lines
#9
Nicholas A Steinmetz, Christina Buetfering, Jerome Lecoq, Christian R Lee, Andrew J Peters, Elina A K Jacobs, Philip Coen, Douglas R Ollerenshaw, Matthew T Valley, Saskia E J de Vries, Marina Garrett, Jun Zhuang, Peter A Groblewski, Sahar Manavi, Jesse Miles, Casey White, Eric Lee, Fiona Griffin, Joshua D Larkin, Kate Roll, Sissy Cross, Thuyanh V Nguyen, Rachael Larsen, Julie Pendergraft, Tanya Daigle, Bosiljka Tasic, Carol L Thompson, Jack Waters, Shawn Olsen, David J Margolis, Hongkui Zeng, Michael Hausser, Matteo Carandini, Kenneth D Harris
Transgenic mouse lines are invaluable tools for neuroscience but, as with any technique, care must be taken to ensure that the tool itself does not unduly affect the system under study. Here we report aberrant electrical activity, similar to interictal spikes, and accompanying fluorescence events in some genotypes of transgenic mice expressing GCaMP6 genetically encoded calcium sensors. These epileptiform events have been observed particularly, but not exclusively, in mice with Emx1-Cre and Ai93 transgenes, of either sex, across multiple laboratories...
September 2017: ENeuro
https://www.readbyqxmd.com/read/28932268/therapeutic-drug-monitoring-of-ct-p13-a-comparison-of-four-different-immunoassays
#10
Joana Afonso, Helena Tavares de Sousa, Isadora Rosa, João Carvalho, Cláudia Camila Dias, Fernando Magro
BACKGROUND: The commercialization of CT-P13, an infliximab (IFX) biosimilar, has the potential to decrease health-related costs and enhance access to biological therapies. This study aimed to address the accuracy and inter-assay agreement of the CT-P13 quantification using four different assays initially developed to assess IFX. METHODS: The four different methods, one in-house method and three commercially available kits, were used to quantify exogenously-spiked samples and the sera from 185 inflammatory bowel disease (IBD) patients on CT-P13 therapy...
September 2017: Therapeutic Advances in Gastroenterology
https://www.readbyqxmd.com/read/28931811/distal-axotomy-enhances-retrograde-presynaptic-excitability-onto-injured-pyramidal-neurons-via-trans-synaptic-signaling
#11
Tharkika Nagendran, Rylan S Larsen, Rebecca L Bigler, Shawn B Frost, Benjamin D Philpot, Randolph J Nudo, Anne Marion Taylor
Injury of CNS nerve tracts remodels circuitry through dendritic spine loss and hyper-excitability, thus influencing recovery. Due to the complexity of the CNS, a mechanistic understanding of injury-induced synaptic remodeling remains unclear. Using microfluidic chambers to separate and injure distal axons, we show that axotomy causes retrograde dendritic spine loss at directly injured pyramidal neurons followed by retrograde presynaptic hyper-excitability. These remodeling events require activity at the site of injury, axon-to-soma signaling, and transcription...
September 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28931647/randomized-open-label-trial-of-dextromethorphan-in-rett-syndrome
#12
Constance L Smith-Hicks, Siddharth Gupta, Joshua B Ewen, Manisha Hong, Lisa Kratz, Richard Kelley, Elaine Tierney, Rebecca Vaurio, Genila Bibat, Abanti Sanyal, Gayane Yenokyan, Nga Brereton, Michael V Johnston, Sakkubai Naidu
OBJECTIVE: To determine safety and perform a preliminary assessment of dose-dependent efficacy of dextromethorphan in normalizing electrographic spikes, clinical seizures, and behavioral and cognitive functions in girls with Rett syndrome. METHODS: We used a prospective randomized, open-label trial in fast metabolizers of dextromethorphan to examine the effect of dextromethorphan on core clinical features of Rett syndrome. Interictal spike activity and clinical seizures were determined using EEG and parent reporting...
September 20, 2017: Neurology
https://www.readbyqxmd.com/read/28930107/cutaneous-rosai-dorfman-disease-with-linear-lesions-and-monoclonal-gammopathy
#13
Edward Bae, Paul White, Mary Brophy, Michael Lichtman, Michael S Krathen, Meera Mahalingam
Cutaneous Rosai-Dorfman disease (CRDD), a benign histiocytosis of unknown etiology, typically presents as a solitary or clusters of lesions. Although the histopathology is fairly distinctive, the laboratory abnormalities are not; past reports note elevated erythrocyte sedimentation rate, anemia, and polyclonal hyperglobulinemia. We describe a 61-year-old African American diabetic gentleman who presented with nodules in a linear distribution on the flank. Histopathologic examination of a biopsied nodule revealed a pandermal sheet-like infiltrate of plasma cells and histiocytes, some demonstrating elastophagocytosis and emperipolesis...
October 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28929229/a-novel-method-for-concentration-of-porcine-reproductive-and-respiratory-syndrome-virus-from-the-environmental-samples-using-self-aggregating-peptide-tagged-cd151-binding-capture
#14
Yang Zong, Xiaoyin Zong, Wenlong Xia, Zhi Wu, Guangya Li, Yangyang Li, Xinyu Zhang, Xiaoli Xia, Huaichang Sun
Environmental surveillance of porcine reproductive and respiratory syndrome virus (PRRSV) represents a key issue in control of the disease. CD151 has recently been recognized as one of several receptors for PRRSV. We describe here a novel method for concentration of PRRSV from the environmental samples by CD151-binding capture. After fusion to self-aggregating peptide ELK16, the large extracellular loop (LEL) of porcine CD151 and its two segments (namely N63 and C63) were expressed in E. coli as protein aggregates...
September 19, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28928637/alpha7-nicotinic-acetylcholine-receptors-play-a-predominant-role-in-the-cholinergic-potentiation-of-n-methyl-d-aspartate-evoked-firing-responses-of-hippocampal-ca1-pyramidal-cells
#15
Zsolt K Bali, Lili V Nagy, István Hernádi
The aim of the present study was to identify in vivo electrophysiological correlates of the interaction between cholinergic and glutamatergic neurotransmission underlying memory. Extracellular spike recordings were performed in the hippocampal CA1 region of anesthetized rats in combination with local microiontophoretic administration of N-methyl-D-aspartate (NMDA) and acetylcholine (ACh). Both NMDA and ACh increased the firing rate of the neurons. Furthermore, the simultaneous delivery of NMDA and ACh resulted in a more pronounced excitatory effect that was superadditive over the sum of the two mono-treatment effects and that was explained by cholinergic potentiation of glutamatergic neurotransmission...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28928441/effects-of-anti-epileptic-drugs-on-spreading-depolarization-induced-epileptiform-activity-in-mouse-hippocampal-slices
#16
Ching-Huei Lin, Shih-Pin Hsu, Ting-Chun Cheng, Chin-Wei Huang, Yao-Chang Chiang, I-Han Hsiao, Ming-Hsueh Lee, Mei-Lin Shen, Dong Chuan Wu, Ning Zhou
Epilepsy and spreading depolarization (SD) are both episodic brain disorders and often exist together in the same individual. In CA1 pyramidal neurons of mouse hippocampal slices, induction of SD evoked epileptiform activities, including the ictal-like bursts, which occurred during the repolarizing phase of SD, and the subsequent generation of paroxysmal depolarization shifts (PDSs), which are characterized by mild depolarization plateau with overriding spikes. The duration of the ictal-like activity was correlated with both the recovery time and the depolarization potential of SD, whereas the parameters of PDSs were not significantly correlated with the parameters of SD...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28927810/biogenic-arsenic-volatilisation-from-an-acidic-fen
#17
Jen-How Huang, Liyan Tian, Gunter Ilgen
To quantify arsenic (As) volatilisation by peatlands and to elucidate the environmental factors governing As volatilisation, a series of anoxic incubations with acidic fen soil collected in northeast Bavaria in Germany were performed at 15°C for 4months. Arsenic volatilisation summed to 2.32ng As in the control, which was 1.6% and ~0.01% of the porewater As and the total As storage in the fen soil, respectively. Treatment with 10mM NaN3 resulted in only 0.03ng As volatilisation. In comparison, addition of 10mM NaOAc stimulated microbial activity in fen soil and As volatilisation rose to 8...
September 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28927557/cacna1a-related-early-onset-encephalopathy-with-myoclonic-epilepsy-a-case-report
#18
Takuya Hayashida, Yoshiaki Saito, Atsushi Ishii, Hiroyuki Yamada, Ayako Itakura, Toshinori Minato, Tetsuhiro Fukuyama, Yoshihiro Maegaki, Shinichi Hirose
We report a one-year-old boy with early-onset myoclonic epilepsy, developmental arrest, and hyperekplexia during early infancy. He presented with refractory myoclonic/tonic seizures since birth. Electroencephalography revealed multifocal spikes, and rhythmic activities that occurred simultaneous with aggravation of myoclonus accompanied by tonic upper limb elevation. Brain magnetic resonance imaging revealed progressive cerebral atrophy with periventricular signal change and thin corpus callosum at one year of age...
September 16, 2017: Brain & Development
https://www.readbyqxmd.com/read/28926747/ictal-source-imaging-and-electroclinical-correlation-in-self-limited-epilepsy-with-centrotemporal-spikes
#19
Jørgen Alving, Martin Fabricius, Ivana Rosenzweig, Sándor Beniczky
PURPOSE: To elucidate the localization of ictal EEG activity, and correlate it to semiological features in self-limited epilepsy with centrotemporal spikes (formerly called "benign epilepsy with centrotemporal spikes"). METHODS: We have performed ictal electric source imaging, and we analysed electroclinical correlations in three patients with self-limited epilepsy with centrotemporal spikes. RESULTS: The source of the evolving rhythmic ictal activity (9...
September 14, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28926582/selection-of-possible-signature-peptides-for-the-detection-of-bovine-lactoferrin-in-infant-formulas-by-lc-ms-ms
#20
Mingmei Yuan, Cong Feng, Shouyun Wang, Weiwei Zhang, Mo Chen, Hong Jiang, Xuesong Feng
An LC-MS/MS assay based on a signature peptide was developed and fully validated for the quantitation of bovine lactoferrin in infant formulas. Three unreported signature peptides were derived and identified from the tryptic peptides of bovine lactoferrin. The peptide ETTVFENLPEK was used for quantification based on assay performance. The blank matrix camel milk powder and bovine lactoferrin protein standards were mixed and spiked with stable isotope-labeled internal standard to establish a calibration curve...
2017: PloS One
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