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https://www.readbyqxmd.com/read/29150920/two-elution-mechanisms-of-mep-chromatography
#1
Tsutomu Arakawa, Masao Tokunaga, Takuya Maruyama, Kentarou Shiraki
MEP (mercapto-ethyl-pyridine) HyperCel is one of the hydrophobic charge induction chromatography (HCIC) resins. Under normal operation, proteins are bound to the MEP resin at neutral pH, at which MEP is not charged, mostly via hydrophobic interaction. MEP has a pyridine group, whose pK is 4.8, and hence is positively charged at acidic pH range. Based on the binding mechanism (i.e., hydrophobic interaction) and the induced positive charge at acidic pH, there may be two ways to elute the bound proteins. One way is to bring the pH down to protonate both MEP resin and the bound protein, leading to charge repulsion and thereby elution...
November 16, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/29147795/preoperative-pregabalin-has-no-effect-on-intraoperative-neurophysiological-monitoring-in-adolescents-undergoing-posterior-spinal-fusion-for-spinal-deformities-a-double-blind-randomized-placebo-controlled-clinical-trial
#2
Linda Helenius, Antti Puhakka, Tuula Manner, Olli Pajulo, Ilkka Helenius
PURPOSE: This study was designed to evaluate the effect of preoperative pregabalin on intraoperative neurophysiological monitoring in adolescents undergoing surgery for spinal deformities. METHODS: Thirty-one adolescents undergoing posterior spinal fusion were randomized to receive preoperatively either pregabalin 2 mg/kg twice daily or placebo. The ability to make reliable intraoperative neurophysiological measurements, transcranial motor (MEPs) and sensory evoked potentials (SSEP) was evaluated...
November 17, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29147586/corticospinal-plasticity-in-bilateral-primary-motor-cortices-induced-by-paired-associative-stimulation-to-the-dominant-hemisphere-does-not-differ-between-young-and-older-adults
#3
Daina S E Dickins, Marc R Kamke, Martin V Sale
Older adults have been shown to exhibit a reduction in the lateralization of neural activity. Although neuroplasticity induced by noninvasive brain stimulation has been reported to be attenuated in the targeted motor cortex of older adults, it remains possible that the plasticity effects may instead manifest in a more distributed (bilateral) network. Furthermore, attention, which modulates neuroplasticity in young adults, may influence these effects. To address these questions, plasticity was induced in young (19-32 years) and older (65-78 years) adults using transcranial magnetic stimulation (TMS) paired with peripheral nerve stimulation...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/29146468/tdcs-changes-in-motor-excitability-are-specific-to-orientation-of-current-flow
#4
Vishal Rawiji, Matteo Ciocca, André Zacharia, David Soares, Dennis Truong, Marom Bikson, John Rothwell, Sven Bestmann
BACKGROUND: Measurements and models of current flow in the brain during transcranial Direct Current Stimulation (tDCS) indicate stimulation of regions in-between electrodes. Moreover, the folded cortex results in local fluctuations in current flow intensity and direction, and animal studies suggest current flow direction relative to cortical columns determines response to tDCS. METHODS: Here we test this idea by using Transcranial Magnetic Stimulation Motor Evoked Potentials (TMS-MEP) to measure changes in corticospinal excitability following tDCS applied with electrodes aligned orthogonal (across) or parallel to M1 in the central sulcus...
November 7, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/29144602/neuroplasticity-following-short-term-strength-training-occurs-at-supraspinal-level-and-is-specific-for-the-trained-task
#5
Louis-Solal Giboin, Benjamin Weiss, Felix Thomas, Markus Gruber
AIMS: Different modalities of strength training cause performance enhancements, which are specific for the trained task. However, the involved mechanisms are still largely unknown. It has been demonstrated that strength training could induce neuroplasticity, which might underlie the performance improvements during the first training sessions. Thus, we hypothesized to find task-specific neuroplasticity after a short-term strength training of two distinct strength tasks. METHODS: Young healthy male subjects were exposed to 4 sessions of either maximal isometric explosive (EXPL group, N = 9) or slow sustained (SUS group, N = 10) knee extensions...
November 16, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/29143298/a-single-nucleotide-mutation-of-ispf-gene-involved-in-the-mep-pathway-for-isoprenoid-biosynthesis-causes-yellow-green-leaf-phenotype-in-rice
#6
Rui Huang, Yang Wang, Pingrong Wang, Chunmei Li, Fuliang Xiao, Nenggang Chen, Na Li, Caixia Li, Changhui Sun, Lihua Li, Rongjun Chen, Zhengjun Xu, Jianqing Zhu, Xiaojian Deng
We identified IspF gene through yellow-green leaf mutant 505ys in rice. OsIspF was expressed in all tissues detected, and its encoded protein was targeted to the chloroplast. On expression levels of genes in this mutant, OsIspF itself and the genes encoding other enzymes of the MEP pathway and chlorophyll synthase were all up-regulated, however, among eight genes associated with photosynthesis, only psaA, psaN and psbA genes for three reaction center subunits of photosystem obviously changed. Isoprenoids are the most abundant natural compounds in all organisms, which originate from the basic five-carbon units isopentenyl diphosphate (IPP) and dimethylallyl diphosphate (DMAPP)...
November 15, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/29142397/chemical-composition-antimicrobial-and-antitumor-potentiality-of-essential-oil-of-ferula-tingitana-l-apiaceae-grow-in-libya
#7
Waleed Elghwaji, Abeer Mohamed El-Sayed, Kadriya S El-Deeb, Aly M ElSayed
Background: Ferula tingitana L. (Apiaceae) has been considered to have abortive and menstruation-inducing properties. It used to treat sore throat, fever, indigestion, and pains. Objectives: The objective of this study is to establish the chemical composition of the essential oil of flower, leaves of F. tingitana, and to throw light on antimicrobial, cytotoxic activities of Libyan plant. Materials and Methods: The chemical composition of the essential oil of flower (0...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29141190/relationship-between-rtms-effects-and-mep-features-before-rtms
#8
Kazuhisa Nojima, Keiji Iramina
Repetitive transcranial magnetic stimulation (rTMS) is a promising method for use in the clinical field, as it can induce modulation of cortical excitability. Generally, rTMS inhibits the motor cortex when delivered at less than 1Hz. However, it has been indicated that a facilitative effect is induced by 1Hz rTMS, depending on the stimulation parameters and the individual. Therefore, the aim of this study was to investigate the features of the subject that could affect the 1Hz rTMS effect when rTMS stimulus conditions change...
November 12, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29140465/short-chain-arabinoxylans-prepared-from-enzymatically-treated-wheat-grain-exert-prebiotic-effects-during-the-broiler-starter-period
#9
N Yacoubi, L Saulnier, E Bonnin, E Devillard, V Eeckhaut, L Rhayat, R Ducatelle, F Van Immerseel
Carbohydrate-degrading multi-enzyme preparations (MEP) are used to improve broiler performances. Their mode of action is complex and not fully understood. In this study, we compared the effect of water-soluble fractions isolated at the pilot scale from wheat grain incubated with (WE) and without (WC) MEP. The fractions were incorporated in a wheat-based diet (0.1% w/w) to feed Ross PM3 broilers and compared with a non-supplemented control group (NC). The body weight gain (BWG), feed intake (FI), and feed conversion ratio (FCR) until d 14 were determined...
November 10, 2017: Poultry Science
https://www.readbyqxmd.com/read/29138488/structural-basis-of-adaptor-mediated-protein-degradation-by-the-tail-specific-pdz-protease-prc
#10
Ming-Yuan Su, Nilanjan Som, Chia-Yun Wu, Shih-Chieh Su, Yi-Ting Kuo, Lu-Chu Ke, Meng-Ru Ho, Shiou-Ru Tzeng, Ching-Hao Teng, Dominique Mengin-Lecreulx, Manjula Reddy, Chung-I Chang
Peptidoglycan (PG) is a highly cross-linked, protective mesh-like sacculus that surrounds the bacterial cytoplasmic membrane. Expansion of PG is tightly coupled to growth of a bacterial cell and requires hydrolases to cleave the cross-links for insertion of nascent PG material. In Escherichia coli, a proteolytic system comprising the periplasmic PDZ-protease Prc and the lipoprotein adaptor NlpI contributes to PG enlargement by regulating cellular levels of MepS, a cross-link-specific hydrolase. Here, we demonstrate how NlpI binds Prc to facilitate the degradation of its substrate MepS by structural and mutational analyses...
November 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/29138092/abnormal-cortical-neuroplasticity-induced-by-paired-associative-stimulation-after-traumatic-spinal-cord-injury-a-preliminary-study
#11
Viviana Versace, Patrick B Langthaler, Yvonne Höller, Vanessa N Frey, Francesco Brigo, Luca Sebastianelli, Leopold Saltuari, Raffaele Nardone
We aimed at assessing in this pilot study whether patients with spinal cord injury (SCI) show alterations of sensorimotor plasticity within the primary motor cortex (M1). Since learning in human M1 occurs through LTP-like mechanisms, we employed the paired associative stimulation (PAS) protocol by transcranial magnetic stimulation (TMS), which is able to induce LTP-like effects in M1, in subjects with chronic SCI. We found that PAS protocol significantly increased corticospinal excitability as long as 30minutes in healthy subjects and in SCI patients with good motor recovery, while it was followed by a non-significant increase of MEP amplitude in the SCI patients with poor functional recovery...
November 11, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29138091/longitudinal-electrophysiological-changes-after-cervical-hemi-contusion-spinal-cord-injury-in-rats
#12
Zucheng Huang, Rong Li, Junhao Liu, Zhiping Huang, Yong Hu, Xiaoliang Wu, Qingan Zhu
OBJECTIVE: To evaluate the longitudinal somatosensory evoked potentials (SEPs) and motor evoked potentials (MEPs) characterization from acute to chronic injury following the cervical hemi-contusion spinal cord injury (SCI) in rats, and correlate the MEPs & SEPs to the behavioral outcomes. METHODS: Fifteen adult male Sprague-Dawley rats were subjected to the hemi-contusion spinal cord injury at C5. Forelimb MEPs & SEPs were applied to 5 animals before injury and 3h, 1d, 3d, 1w, 2w, 4w and 8w after injury respectively...
November 11, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29137760/a-novel-high-performance-nano-chemosensor-for-copper-ii-ion-based-on-an-ultrasound-assisted-synthesized-diphenylamine-based-schiff-base-design-fabrication-and-density-functional-theory-calculations
#13
Zohreh Parsaee, Pouya Haratipour, Milad Janghorban Lariche, Arash Vojood
A novel high selective colorimetric chemosensor was introduced based on a nano diphenyl-based Schiff base (H2L), 2,2'-((1E,1'E)-(((hexylazanediyl)bis(4,1-phenylene))bis(methanylylidene))bis(azanylylidene))bis(4-methylphenol) that synthesized using sonochemical method. H2L was characterized by FT-IR, MS, TGA, (1)H NMR, (13)C NMR, SEM and elemental analysis techniques, then fabricated as the portable strips for sensing copper (II) ions in aqueous media. The binding interaction between H2L and various metal ions was investigated by UV-Vis spectroscopic that showed favorable coordination toward Cu(2+) ion...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29135493/relationship-between-postoperative-pain-and-overall-30-day-complications-in-a-broad-surgical-population-an-observational-study
#14
Regina L M van Boekel, Michiel C Warlé, Renske G C Nielen, Kris C P Vissers, Rob van der Sande, Ewald M Bronkhorst, Jos G C Lerou, Monique A H Steegers
OBJECTIVE: The aim of this study was to establish the relationship between postoperative pain and 30-day postoperative complications. BACKGROUND: Only scarce data are available on the association between postoperative pain and a broad range of postoperative complications in a large heterogeneous surgical population. METHODS: Having postoperative pain was assessed in 2 ways: the movement-evoked pain score on the Numerical Rating Scale (NRS-MEP) and the patients' opinion whether the pain was acceptable or not...
November 13, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/29127163/mep-demands-evidence-for-brexit-benefits
#15
(no author information available yet)
No abstract text is available yet for this article.
November 11, 2017: Veterinary Record
https://www.readbyqxmd.com/read/29126183/up-in-smoke-uncovering-a-lack-of-evidence-for-proton-pump-inhibitors-as-a-source-of-tetrahydrocannibol-immunoassay-false-positives
#16
Jennifer L Powers, Natalie N Rasmussen, Dow Hurst, Frederick G Strathmann
Objective: It is recommended that positives in immunoassay drug screens be followed up with more specific confirmatory testing. The drug package insert for pantoprazole mentions reports of false-positive urine screening tests for tetrahydrocannabinol in patients receiving proton pump inhibitors, but no method details or data are given, referenced, or found in literature searches. Thus, we investigated this using our laboratory's assay. Methods: A spiked sample and samples from 32 patients taking a proton pump inhibitor were analyzed using the EMIT II Plus Cannabinoid assay with a 20 ng/mL cutoff...
November 8, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/29122348/associations-of-urinary-phthalate-metabolites-with-residential-characteristics-lifestyles-and-dietary-habits-among-young-children-in-shanghai-china
#17
Chenxi Liao, Wei Liu, Jialing Zhang, Wenming Shi, Xueying Wang, Jiao Cai, Zhijun Zou, Rongchun Lu, Chanjuan Sun, Heng Wang, Chen Huang, Zhuohui Zhao
Exposure to household phthalates has been reported to have adverse effects on children's health. In this paper, we used phthalate metabolites in the first morning urine as indicators of household phthalate exposures and examined their associations with residential characteristics, lifestyles and dietary habits among young children. During 2013-2014, we collected morning urines from children aged 5-10years in Shanghai, China and obtained the related information about analyzed factors in this study by questionnaires...
November 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29121768/comparative-analysis-of-tocopherol-biosynthesis-genes-and-its-transcriptional-regulation-in-soybean-seeds
#18
Vinutha T, Navita Bansal, Khushboo Kumari, Rama Prashat G, Rohini Sreevathsa, Veda Krishnan, Sweta Kumari, Anil Dahuja, S K Lal, Archana Sachdev, Shelly Praveen
Tocopherols composed of four isoforms (α, β, γ and δ) and its biosynthesis comprises of three pathways; Methylerythritol 4-phosphate (MEP), shikimate (SK) and tocopherol-core pathways regulated by 25 enzymes. To understand pathway regulatory mechanism at transcriptional level, gene expression profile of tocopherol-biosynthesis genes in two soybean genotypes was carried out, the results showed significantly differential expression of 5 genes; 1-deoxy-D-xylulose-5-P-reductoisomerase (DXR), geranyl geranyl reductase (GGDR)¬ - from MEP; arogenate dehydrogenase (TyrA), tyrosine aminotransferase (TAT) - from SK and γ-tocopherol methyl transferase 3 (γ-TMT3) from tocopherol-core pathways...
November 9, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29121247/prediction-of-individual-outcomes-for-asthma-sufferers
#19
B Storlie Curtis, E Branda Megan, R Gionfriddo Michael, D Shah Nilay, A Rank Matthew
We consider the problem of individual-specific medication level recommendation (initiation, removal, increase, or decrease) for asthma sufferers. Asthma is one of the most common chronic diseases in both adults and children, affecting 8% of the US population and costing $37-63 billion/year in the United States of America. Asthma is a complex disease, whose symptoms may wax and wane, making it difficult for clinicians to predict outcomes and prognosis. Improved ability to predict prognosis can inform decision making and may promote conversations between clinician and provider around optimizing medication therapy...
November 6, 2017: Biostatistics
https://www.readbyqxmd.com/read/29118698/an-acute-exposure-to-muscle-vibration-decreases-knee-extensors-force-production-and-modulates-associated-central-nervous-system-excitability
#20
Robin Souron, Thibault Besson, Chris J McNeil, Thomas Lapole, Guillaume Y Millet
Local vibration (LV) has been recently validated as an efficient training method to improve muscle strength. Understanding the acute effects may help elucidate the mechanism(s). This study aimed to investigate the effects of a single bout of prolonged LV on knee extensor force production and corticospinal responsiveness of vastus lateralis (VL) and rectus femoris (RF) muscles in healthy young and old adults. Across two visits, 23 adult subjects (20-75 years old) performed pre- and post-test measurements, separated by 30-min of either rest (control; CON) or LV...
2017: Frontiers in Human Neuroscience
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