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https://www.readbyqxmd.com/read/29145719/maintained-mpf-level-after-oocyte-vitrification-improves-embryonic-development-after-ivf-but-not-after-somatic-cell-nuclear-transfer
#1
Ji I Baek, Dong-Won Seol, Ah-Reum Lee, Woo Sik Lee, Sook-Young Yoon, Dong Ryul Lee
Levels of maturation-promoting factor (MPF) in oocytes decline after vitrification, and this decline has been suggested as one of the main causes of low developmental competence resulting from cryoinjury. Here, we evaluated MPF activity in vitrified mouse eggs following treatment with caffeine, a known stimulator of MPF activity, and/or the proteasome inhibitor MG132. Collected MII oocytes were vitrified and divided into four groups: untreated, 10 mM caffeine (CA), 10 μM MG132 (MG), and 10 mM caffeine +10 μM MG132 (CA+MG)...
November 16, 2017: Molecules and Cells
https://www.readbyqxmd.com/read/29145471/arbuscular-mycorrhizal-strategy-for-zinc-mycoremediation-and-diminished-translocation-to-shoots-and-grains-in-wheat
#2
Abdelghafar M Abu-Elsaoud, Nivien A Nafady, Ahmed M Abdel-Azeem
Mycoremediation is an on-site remediation strategy, which employs fungi to degrade or sequester contaminants from the environment. The present work focused on the bioremediation of soils contaminated with zinc by the use of a native mycorrhizal fungi (AM) called Funneliformis geosporum (Nicol. & Gerd.) Walker & Schüßler. Experiments were performed using Triticum aestivum L. cv. Gemmeza-10 at different concentrations of Zn (50, 100, 200 mg kg-1) and inoculated with or without F. geosporum. The results showed that the dry weight of mycorrhizal wheat increased at Zn stressed plants as compared to the non-Zn-stressed control plants...
2017: PloS One
https://www.readbyqxmd.com/read/29145061/utility-of-electronic-aki-alerts-in-intensive-care-a-national-multicentre-cohort-study
#3
Jennifer Holmes, Gethin Roberts, John Geen, Alan Dodd, Nicholas M Selby, Andrew Lewington, Gareth Scholey, John D Williams, Aled O Phillips
BACKGROUND: Electronic AKI alerts highlight changes in serum creatinine compared to the patient's own baseline. Our aim was to identify all AKI alerts and describe the relationship between electronic AKI alerts and outcome for AKI treated in the Intensive Care Unit (ICU) in a national multicentre cohort. METHODS: A prospective cohort study was undertaken between November 2013 and April 2016, collecting data on electronic AKI alerts issued. RESULTS: 10% of 47,090 incident AKI alerts were associated with ICU admission...
October 18, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/29145059/binding-of-naringin-and-naringenin-with-hen-egg-white-lysozyme-a-spectroscopic-investigation-and-molecular-docking-study
#4
Sourav Das, Pooja Ghosh, Sudipta Koley, Atanu Singha Roy
The interactions of naringenin (NG) and naringin (NR) with Hen Egg White Lysozyme (HEWL) in aqueous medium have been investigated using UV-vis spectroscopy, steady-state fluorescence, circular dichroism (CD), Fourier Transform infrared spectroscopy (FT-IR) and molecular docking analyses. Both NG and NR can quench the intrinsic fluorescence of HEWL via static quenching mechanism. At 300K, the value of binding constant (Kb) of HEWL-NG complex (5.596±0.063×10(4)M(-1)) was found to be greater than that of HEWL-NR complex (3...
November 8, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29145056/environmental-life-cycle-assessment-of-marine-sediment-decontamination-by-citric-acid-enhanced-microwave-heating
#5
Pietro P Falciglia, Carlo Ingrao, Guido De Guidi, Alfio Catalfo, Guglielmo Finocchiaro, Marcello Farina, Maria Liali, Giuseppe Lorenzano, Gaetano Valastro, Federico G A Vagliasindi
The potential ability of microwave heating (MWH) for the remediation of marine sediments affected by severe hydrocarbon (HC) contamination was investigated. Decontamination effectiveness and environmental sustainability through a comparative Life Cycle Assessment (LCA) were addressed. Main results revealed that the application of a 650-W MWH treatment resulted in a rapid (15min) HC removal. A citric acid (CA) dose of 0.1M led to enhanced-HC removals of 76.9, 96.5 and 99.7% after 5, 10 and 15min of MW irradiation, respectively...
November 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29144974/double-nanodomain-coupling-of-calcium-channels-ryanodine-receptors-and-bk-channels-controls-the-generation-of-burst-firing
#6
Tomohiko Irie, Laurence O Trussell
Action potentials clustered into high-frequency bursts play distinct roles in neural computations. However, little is known about ionic currents that control the duration and probability of these bursts. We found that, in cartwheel inhibitory interneurons of the dorsal cochlear nucleus, the likelihood of bursts and the interval between their spikelets were controlled by Ca(2+) acting across two nanodomains, one between plasma membrane P/Q Ca(2+) channels and endoplasmic reticulum (ER) ryanodine receptors and another between ryanodine receptors and large-conductance, voltage- and Ca(2+)-activated K(+) (BK) channels...
November 15, 2017: Neuron
https://www.readbyqxmd.com/read/29144454/dynamics-of-p-type-atpase-transport-revealed-by-single-molecule-fret
#7
Mateusz Dyla, Daniel S Terry, Magnus Kjaergaard, Thomas L-M Sørensen, Jacob Lauwring Andersen, Jens Peter Andersen, Charlotte Rohde Knudsen, Roger B Altman, Poul Nissen, Scott C Blanchard
Phosphorylation-type (P-type) ATPases are ubiquitous primary transporters that pump cations across cell membranes through the formation and breakdown of a phosphoenzyme intermediate. Structural investigations suggest that the transport mechanism is defined by conformational changes in the cytoplasmic domains of the protein that are allosterically coupled to transmembrane helices so as to expose ion binding sites to alternate sides of the membrane. Here, we have used single-molecule fluorescence resonance energy transfer to directly observe conformational changes associated with the functional transitions in the Listeria monocytogenes Ca(2+)-ATPase (LMCA1), an orthologue of eukaryotic Ca(2+)-ATPases...
November 16, 2017: Nature
https://www.readbyqxmd.com/read/29144399/dna-g-wire-formation-using-an-artificial-peptide-is-controlled-by-protease-activity
#8
Kenji Usui, Arisa Okada, Shungo Sakashita, Masayuki Shimooka, Takaaki Tsuruoka, Shu-Ichi Nakano, Daisuke Miyoshi, Tsukasa Mashima, Masato Katahira, Yoshio Hamada
The development of a switching system for guanine nanowire (G-wire) formation by external signals is important for nanobiotechnological applications. Here, we demonstrate a DNA nanostructural switch (G-wire <--> particles) using a designed peptide and a protease. The peptide consists of a PNA sequence for inducing DNA to form DNA-PNA hybrid G-quadruplex structures, and a protease substrate sequence acting as a switching module that is dependent on the activity of a particular protease. Micro-scale analyses via TEM and AFM showed that G-rich DNA alone forms G-wires in the presence of Ca(2+), and that the peptide disrupted this formation, resulting in the formation of particles...
November 16, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29143845/pulse-laser-induced-fragmentation-of-carbon-quantum-dots-a-structural-analysis
#9
Han-Wei Chu, Ju-Yi Mao, Chia-Wen Lien, Pang-Hung Hsu, Yu-Jia Li, Jui-Yang Lai, Tai-Chia Chiu, Chih-Ching Huang
Carbon quantum dots (CQDs) have attracted enormous interest in recent years owing to their low cytotoxicity, excellent biocompatibility and strong fluorescence. They have been successfully employed in sensor, bio-imaging, and drug carrier applications. A complete understanding of their core-surface structure is essential for tuning their physical and chemical properties for various applications. Conventional characterizations of CQDs are conducted with electron microscopy or spectroscopy, such as transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and Raman spectroscopy...
November 16, 2017: Nanoscale
https://www.readbyqxmd.com/read/29143830/gramicidin-ion-channels-in-a-lipid-bilayer-supported-on-polyelectrolyte-multilayer-films-an-electrochemical-impedance-study
#10
Eleftheria Diamanti, Eduart Gutiérrez-Pineda, Nikolaos Politakos, Patrizia Andreozzi, María José Rodriguez-Presa, Wolfgang Knoll, Omar Azzaroni, Claudio A Gervasi, Sergio E Moya
Supported membranes on polymer cushions are of fundamental interest as models for cell membranes. The use of polyelectrolyte multilayers (PEMs) assembled by the layer by layer (LbL) technique as supports for a bilayer allows for easy integration of the lipid bilayer on surfaces and devices and for nanoscale tunable spacing of the lipid bilayer. Controlling ionic permeability in lipid bilayers supported on PEMs triggers potential applications in sensing and as models for transport phenomena in cell membranes...
November 16, 2017: Soft Matter
https://www.readbyqxmd.com/read/29143776/gastric-cancer-cell-glycosylation-as-a-modulator-of-the-erbb2-oncogenic-receptor
#11
Henrique O Duarte, Meritxell Balmaña, Stefan Mereiter, Hugo Osório, Joana Gomes, Celso A Reis
Aberrant expression and hyperactivation of the human epidermal growth factor receptor 2 (ErbB2) constitute crucial molecular events underpinning gastric neoplastic transformation. Despite ErbB2 extracellular domain being a well-known target for glycosylation, its glycosylation profile and the molecular mechanisms through which it actively tunes tumorigenesis in gastric cancer (GC) cells remain elusive. We aimed at disclosing relevant ErbB2 glycan signatures and their functional impact on receptor's biology in GC cells...
October 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29143364/automated-preparation-of-2-18-f-fluoropropionate-labelled-peptides-using-a-flexible-multi-stage-synthesis-platform-iphase-flexlab
#12
Mohammad B Haskali, Peter D Roselt, Rodney J Hicks, Craig A Hutton
Radiolabelled peptides are vital tools used in positron emission tomography (PET) imaging for the diagnosis of disease, drug discovery and biomedical research. Peptides are typically labelled through conjugation to a radiolabelled prosthetic group, which usually necessitates complex, multi-step procedures, especially for fluorine-18 labelled peptides. Herein, we describe the automated synthesis and formulation of 2-[(18) F]fluoropropionate labelled RGD-peptides through use of the iPHASE Flexlab as an effective dual-stage radiochemical synthesis module...
November 16, 2017: Journal of Labelled Compounds & Radiopharmaceuticals
https://www.readbyqxmd.com/read/29143340/k2p-task-2-and-kcnq1-kcne3-k-channels-are-major-players-contributing-to-intestinal-anion-and-fluid-secretion
#13
Francisca Julio-Kalajzić, Sandra Villanueva, Johanna Burgos, Margarita Ojeda, L Pablo Cid, Thomas J Jentsch, Francisco V Sepúlveda
Anion and fluid secretion across the intestinal epithelium, a process altered in cystic fibrosis and secretory diarrhoea, is mediated by cAMP-activated CFTR Cl(-) channels and requires the simultaneous activity of basolateral K(+) channels to maintain cellular ionic homeostasis and membrane potential. This function is fulfilled by the cAMP-activated K(+) channel formed by the association of pore-forming KCNQ1 with its obligatory KCNE3 β-subunit. Studies using mice show sizable cAMP-activated intestinal anion secretion in the absence of either KCNQ1 or KCNE3 suggesting that an alternative K(+) conductance must compensate for the loss of KCNQ1/KCNE3 activity...
November 16, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/29143257/environmental-characteristics-and-changes-of-sediment-pore-water-dissolved-organic-matter-in-four-chinese-lakes
#14
Khan M G Mostofa, Wen Li, Fengchang Wu, Cong-Qiang Liu, Haiqing Liao, Li Zeng, Min Xiao
Sediment pore waters were examined in four Chinese lakes (Bosten, Qinghai, Chenghai and Dianchi) to characterise the sources of dissolved organic matter (DOM) and their microbial changes in the sediment depth profiles. Parallel factor (PARAFAC) modelling on the sample fluorescence spectra confirmed that the pore water DOM was mostly composed of two components with a mixture of both allochthonous and autochthonous fulvic acid-like substances in three lakes, except Lake Dianchi, and protein-like components in Lake Bosten...
November 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29143202/tobacco-plants-expressing-the-maize-nitrate-transporter-zmnrt2-1-exhibit-altered-responses-of-growth-and-gene-expression-to-nitrate-and-calcium
#15
Abubakar Ibrahim, Xiao-Lu Jin, Yu-Bin Zhang, Jessica Cruz, Paveena Vichyavichien, Nwadiuto Esiobu, Xing-Hai Zhang
BACKGROUND: Nitrate uptake is a highly regulated process. Understanding the intricate interactions between nitrate availability and genetically-controlled nitrate acquisition and metabolism is essential for improving nitrogen use efficiency and increasing nitrate uptake capacity for plants grown in both nitrate-poor and nitrate-enriched environments. In this report, we introduced into tobacco (Nicotiana tabacum) the constitutively expressed maize high-affinity transporter ZmNrt2.1 gene that would bypass the tight control for the endogenous nitrate-responsive genes...
November 15, 2017: Botanical Studies (Taipei, Taiwan)
https://www.readbyqxmd.com/read/29143161/point-of-care-b-type-natriuretic-peptide-and-portable-echocardiography-for-assessment-of-patients-with-suspected-heart-failure-in-primary-care-rationale-and-design-of-the-three-part-handheld-bnp-program-and-results-of-the-training-study
#16
Caroline Morbach, Thomas Buck, Christian Rost, Sebastian Peter, Stephan Günther, Stefan Störk, Christiane Prettin, Raimund Erbel, Georg Ertl, Christiane E Angermann
BACKGROUND: Patients with suspected heart failure (HF) often present first to general practitioners (GPs). Timely and accurate HF diagnosis and reliable prognostic information have remained unmet goals in primary care, where patient evaluation often relies on clinical assessment only. The Handheld-BNP program investigates whether additional use of portable echocardiography (ECHO) and point-of-care determination of B-type natriuretic peptide (BNP) improves the accuracy of HF diagnosis and aids risk prediction in primary care...
November 15, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/29143129/competitive-co-operative-interactions-in-acid-base-sandwich-role-of-cation-vs-substituents
#17
Ayyavoo Kalpana, Lakshminarayanan Akilandeswari
The cation-π interaction can be envisaged as a lewis acid base interaction, and it is in line with Pearson's acid base concept. The critical examination of interactions between the π-acids (alkali metal cations - Li(+), Na(+) and alkaline earth metal cations Mg(2+), Ca(2+)) on one face and tripodal Cr(CO)3 moiety on the other π face of substituted arenes demonstrates the role of cation and substitutents in manipulating the interactions between them. The interaction of the two π acids on both faces of arene is not expectedly additive, rather it shows either depreciation of interaction energy revealing the competition of acids toward the base or enhancement of interaction energy denoting a cooperative effect...
November 15, 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/29142982/a-single-and-multiple-dose-multicenter-study-of-etelcalcetide-in-japanese-hemodialysis-patients-with-secondary-hyperparathyroidism
#18
Keitaro Yokoyama, Masafumi Fukagawa, Takashi Shigematsu, Takashi Akiba, Akifumi Fujii, Akinori Yamauchi, Motoi Odani, Tadao Akizawa
Introduction: The pharmacokinetics, pharmacodynamics, and safety and tolerability profile of etelcalcetide (ONO-5163/AMG 416), a novel, i.v., long-acting calcium-sensing receptor agonist, were studied in Japanese hemodialysis patients with secondary hyperparathyroidism. Methods: This multicenter, randomized, double-blind, placebo-controlled, parallel-group study consisted of a single dose part and a multiple dose (3 times weekly for 4 weeks) part. Major inclusion criteria were hemodialysis for at least 90 days, serum intact parathyroid hormone (iPTH) ≥ 300 pg/ml, and serum albumin-corrected Ca (cCa) ≥ 9...
July 2017: KI Reports
https://www.readbyqxmd.com/read/29142777/-trajectory-of-lumbar-and-sacral-pedicular-screws-comparison-between-midline-versus-wiltse-approach
#19
Martín Gagliardi, Alfredo Guiroy, Federico Fernández Molina, Francisco Fasano, Alejandro Morales Ciancio, Juan José Mezzadri, Pablo Jalón
Objectives: To compare the posterolateral Wiltse approach and conventional Midline approach in short lumbosacral fusions in terms of the angle of convergence of pedicle screws. Methods: We retrospectively reviewed computed tomography (CT) images of 76 lumbar and sacral pedicular screws that had been placed using a conventional midline approach (CA) (n = 38) and a Wiltse posterolateral approach (WA) (n = 38). All patients underwent short lumbosacral fusions from L3 to S1 for degenerative spinal disease...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/29142427/cinnamaldehyde-cinnamic-acid-and-cinnamyl-alcohol-the-bioactives-of-cinnamomum-cassia-exhibit-hdac8-inhibitory-activity-an-in-vitro-and-in-silico-study
#20
Mangesh Patil, Amit S Choudhari, Savita Pandita, Md Ataul Islam, Prerna Raina, Ruchika Kaul-Ghanekar
Background: The altered expression of histone deacetylase family member 8 (HDAC8) has been found to be linked with various cancers, thereby making its selective inhibition a potential strategy in cancer therapy. Recently, plant secondary metabolites, particularly phenolic compounds, have been shown to possess HDAC inhibitory activity. Objective: In the present work, we have evaluated the potential of cinnamaldehyde (CAL), cinnamic acid (CA), and cinnamyl alcohol (CALC) (bioactives of Cinnamomum) as well as aqueous cinnamon extract (ACE), to inhibit HDAC8 activity in vitro and in silico...
October 2017: Pharmacognosy Magazine
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