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https://www.readbyqxmd.com/read/28718781/latent-variable-method-for-automatic-adaptation-to-background-states-in-motor-imagery-bci
#1
Nikolay Dagaev, Ksenia Volkova, Alexei Ossadtchi
<i>Objective</i>. Brain-computer interface (BCI) systems are known to be vulnerable to variabilities in background states of a user. Usually, no detailed information on these states is available even during the training stage. Thus there is a need in a method which is capable of taking background states into account in an unsupervised way. <i>Approach</i>. We propose a latent variable method that is based on a probabilistic model with a discrete latent variable. In order to estimate the model's parameters, we suggest to use the expectation maximization (EM) algorithm...
July 18, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28716905/mitoneet-dependent-formation-of-intermitochondrial-junctions
#2
Alexandre Vernay, Anna Marchetti, Ayman Sabra, Tania N Jauslin, Manon Rosselin, Philipp E Scherer, Nicolas Demaurex, Lelio Orci, Pierre Cosson
MitoNEET (mNEET) is a dimeric mitochondrial outer membrane protein implicated in many facets of human pathophysiology, notably diabetes and cancer, but its molecular function remains poorly characterized. In this study, we generated and analyzed mNEET KO cells and found that in these cells the mitochondrial network was disturbed. Analysis of 3D-EM reconstructions and of thin sections revealed that genetic inactivation of mNEET did not affect the size of mitochondria but that the frequency of intermitochondrial junctions was reduced...
July 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28716758/oral-delivery-of-vancomycin-by-tetraether-lipid-liposomes
#3
Philipp Uhl, Silvia Pantze, Philip Storck, Johannes Parmentier, Dominik Witzigmann, Götz Hofhaus, Jörg Huwyler, Walter Mier, Gert Fricker
Despite the outstanding progress in modern medicine, the oral delivery of peptide drugs is limited until today due to their instability in the gastrointestinal tract and low mucosa penetration. To overcome these hurdles, liposomes containing the specific tetraether lipid GCTE (glycerylcaldityltetraether lipid) were examined. For this purpose, the glycopeptide antibiotic vancomycin was used as model substance and liposomes were prepared by DAC (dual assymetric centrifugation). These liposomes showed a size and polydispersity index comparable to standard liposomes...
July 14, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28714555/evidence-that-eye-movement-profiles-do-not-explain-slow-binocular-rivalry-rate-in-bipolar-disorder-support-for-a-perceptual-endophenotype
#4
Phillip Cf Law, Caroline T Gurvich, Trung T Ngo, Steven M Miller
OBJECTIVES: Presenting conflicting images simultaneously, one to each eye, produces perceptual alternations known as binocular rivalry (BR). Slow BR rate has been proposed as an endophenotype for bipolar disorder (BD) for use in large-scale genome-wide association studies. However, the trait could conceivably reflect eye movement (EM) dysfunction in BD rather than anomalous perceptual processing per se. To address this question, we examined the relationship between EM profiles and BR rate for various stimulus types in BD and healthy subjects...
July 17, 2017: Bipolar Disorders
https://www.readbyqxmd.com/read/28714467/cryo-em-structures-of-the-atp-bound-vps4-e233q-hexamer-and-its-complex-with-vta1-at-near-atomic-resolution
#5
Shan Sun, Lin Li, Fan Yang, Xiaojing Wang, Fenghui Fan, Mengyi Yang, Chunlai Chen, Xueming Li, Hong-Wei Wang, Sen-Fang Sui
The cellular ESCRT-III (endosomal sorting complex required for transport-III) and Vps4 (vacuolar protein sorting 4) comprise a common machinery that mediates a variety of membrane remodelling events. Vps4 is essential for the machinery function by using the energy from ATP hydrolysis to disassemble the ESCRT-III polymer into individual proteins. Here, we report the structures of the ATP-bound Vps4(E233Q) hexamer and its complex with the cofactor Vta1 (vps twenty associated 1) at resolutions of 3.9 and 4.2 Å, respectively, determined by electron cryo-microscopy...
July 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28713392/il-15-harnesses-pro-inflammatory-function-of-temra-cd8-in-kidney-transplant-recipients
#6
Gaëlle Tilly, Tra-My Doan-Ngoc, Michelle Yap, Aurélie Caristan, Lola Jacquemont, Richard Danger, Marion Cadoux, Sarah Bruneau, Magali Giral, Pierrick Guerif, Bryan Nicol, Alexandra Garcia, David-Axel Laplaud, Sophie Brouard, Claire Pecqueur Hellman, Nicolas Degauque
The involvement of TEMRA CD8 is evident in a large array of immunological conditions ranging from auto- to allo-immunity. Nevertheless, the factors leading to their accumulation and activation remain ill-defined and, efficient therapeutics to control their inflammatory response is lacking. Here, we show that IL-15-stimulated TEMRA from kidney-transplant (KT) recipients promote inflammation by inducing the expression of CX3CL1 by endothelial cells in an IFN-γ- and TNF-α-dependent manner. The responsiveness of TEMRA to IL-15 is not restricted to chronic stimulation, as TEMRA from healthy volunteers respond earlier and faster when compared to effector memory (EM)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28712539/chronic-treatment-with-angiotensin-converting-enzyme-inhibitor-increases-cardiac-fibrosis-in-young-rats-submitted-to-early-ovarian-failure
#7
Sabrina Graziani Veloso Dutra, Ana Carolina Sanches Felix, Ada Clarice Gastaldi, Tábata De Paula Facioli, Suenimeire Vieira, Hugo Celso Dutra De Souza
BACKGROUND: We investigated whether the treatment with enalapril maleate, combined with aerobic physical training, promotes positive effects on the autonomic balance, the morphology and the cardiac function in female rats submitted to early ovarian failure. METHODS: Thirty-five female Wistar rats, ovariectomized at 10weeks of age, were assigned into Ovariectomized rats (OVX) and Ovariectomized rats treated with enalapril maleate (OVX-EM, 10mg(-1)·kg(-1)·d(-1)) Each group was subdivided into sedentary and trained (aerobic swimming training for 10weeks)...
July 10, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/28711156/towards-a-structural-view-of-drug-binding-to-herg-k-channels
#8
REVIEW
Jamie I Vandenberg, Eduardo Perozo, Toby W Allen
The human ether-a-go-go-related gene (hERG) K(+) channel is of great medical and pharmaceutical relevance. Inherited mutations in hERG result in congenital long-QT syndrome which is associated with a markedly increased risk of cardiac arrhythmia and sudden death. hERG K(+) channels are also remarkably susceptible to block by a wide range of drugs, which in turn can cause drug-induced long-QT syndrome and an increased risk of sudden death. The recent determination of the near-atomic resolution structure of the hERG K(+) channel, using single-particle cryo-electron microscopy (cryo-EM), provides tremendous insights into how these channels work...
July 12, 2017: Trends in Pharmacological Sciences
https://www.readbyqxmd.com/read/28710842/severe-sequelae-of-erythema-multiforme-three-cases
#9
A Viarnaud, S Ingen-Housz-Oro, M Marque, L Valeyrie-Allanore, N Ortonne, J Gueudry, S Grootenboer-Mignot, M Muraine, E Bequignon, C Gagnière, F Schlemmer, P Wolkenstein, O Chosidow
Erythema multiforme (EM) is a skin condition for which main causes are infectious factors (Herpes simplex virus, Mycoplasma pneumoniae). Anti-plakin auto-antibodies are found in some patients (1) . EM must be distinguished from Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN), which are drug-induced in most cases (2-5) . This article is protected by copyright. All rights reserved.
July 14, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28710447/cryo-em-reconstruction-of-the-cafeteria-roenbergensis-virus-capsid-suggests-novel-assembly-pathway-for-giant-viruses
#10
Chuan Xiao, Matthias G Fischer, Duer M Bolotaulo, Nancy Ulloa-Rondeau, Gustavo A Avila, Curtis A Suttle
Whereas the protein composition and overall shape of several giant virus capsids have been described, the mechanism by which these large capsids assemble remains enigmatic. Here, we present a reconstruction of the capsid of Cafeteria roenbergensis virus (CroV), one of the largest viruses analyzed by cryo-electron microscopy (cryo-EM) to date. The CroV capsid has a diameter of 3,000 Å and a Triangulation number of 499. Unlike related mimiviruses, the CroV capsid is not decorated with glycosylated surface fibers, but features 30 Å-long surface protrusions that are formed by loops of the major capsid protein...
July 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28710392/comparative-study-of-arabidopsis-pbs1-and-a-wheat-pbs1-homolog-helps-understand-the-mechanism-of-pbs1-functioning-in-innate-immunity
#11
Jianhang Sun, Guozhong Huang, Fenggui Fan, Shuangfeng Wang, Yingying Zhang, Yufang Han, Yanmin Zou, Dongping Lu
Arabidopsis AVRPPHB SUSCEPTIBLE1 (PBS1) serves as a "decoy" in activating RESISTANCE TO PSEUDOMONAS SYRINGAE5 (RPS5) upon cleavage by Pseudomonas phaseolicola B (AvrPphB), a Pseudomonas syringae effector. The SEMPH motif in PBS1 was thought to allow it to be distinguished by RPS5 from the closely related Arabidopsis kinases. However, the underlying mechanism is not fully understood. Here, we isolated and characterized a wheat PBS1 homolog, TaPBS1. Although this plasma membrane-localized kinase could be cleaved by AvrPphB and could associate with RPS5, it failed to trigger RPS5-mediated hypersensitive response (HR) in a transient assay...
July 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28710336/subunit-conformational-variation-within-individual-groel-oligomers-resolved-by-cryo-em
#12
Soung-Hun Roh, Corey F Hryc, Hyun-Hwan Jeong, Xue Fei, Joanita Jakana, George H Lorimer, Wah Chiu
Single-particle electron cryo-microscopy (cryo-EM) is an emerging tool for resolving structures of conformationally heterogeneous particles; however, each structure is derived from an average of many particles with presumed identical conformations. We used a 3.5-Å cryo-EM reconstruction with imposed D7 symmetry to further analyze structural heterogeneity among chemically identical subunits in each GroEL oligomer. Focused classification of the 14 subunits in each oligomer revealed three dominant classes of subunit conformations...
July 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28709139/the-raman-and-sers-spectra-of-indigo-and-indigo-ag2-complex-dft-calculation-and-comparison-with-experiment
#13
Marilena Ricci, Cristiana Lofrumento, Maurizio Becucci, Emilio M Castellucci
Using time-dependent density functional theory in conjunction with B3LYP functional and LANL2DZ/6-31+g(d,p) basis sets, static and pre-resonance Raman spectra of the indigo-Ag2 complex have been calculated. Structure optimization, excitation energies and pre-resonance Raman spectra of the indigo molecule have been obtained at the same level of theory. The available experimental Raman spectra at 1064, 785 and 514nm and the SERS spectra at 785 and 514nm have been well reproduced by the calculation. Experimental SERS spectra are confronted with the calculated pre-resonance Raman spectra obtained for the indigo-Ag2 complex...
July 6, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28707751/oral-antifungal-medication-for-toenail-onychomycosis
#14
REVIEW
Sanne Kreijkamp-Kaspers, Kate Hawke, Linda Guo, George Kerin, Sally Em Bell-Syer, Parker Magin, Sophie V Bell-Syer, Mieke L van Driel
BACKGROUND: Fungal infection of the toenails, also called onychomycosis, is a common problem that causes damage to the nail's structure and physical appearance. For those severely affected, it can interfere with normal daily activities. Treatment is taken orally or applied topically; however, traditionally topical treatments have low success rates due to the nail's physical properties. Oral treatments also appear to have shorter treatment times and better cure rates. Our review will assist those needing to make an evidence-based choice for treatment...
July 14, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28706490/effects-of-6-weeks-high-intensity-interval-training-in-schoolchildren-with-insulin-resistance-influence-of-biological-maturation-on-metabolic-body-composition-cardiovascular-and-performance-non-responses
#15
Cristian Alvarez, Rodrigo Ramírez-Campillo, Robinson Ramírez-Vélez, Mikel Izquierdo
Background: Previous studies have observed significant heterogeneity in the magnitude of change in measures of metabolic response to exercise training. There are a lack of studies examining the prevalence of non-responders (NRs) in children while considering other potential environmental factors involved such as biological maturation. Aim: To compare the effects and prevalence of NRs to improve the insulin resistance level (by HOMA-IR), as well as to other anthropometric, cardiovascular, and performance co-variables, between early (EM) and normal maturation (NM) in insulin-resistance schoolchildren after 6-weeks of HIIT...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28706151/osteoblast-oriented-differentiation-of-bmscs-by-co-culturing-with-composite-scaffolds-constructed-using-silicon-substituted-calcium-phosphate-autogenous-fine-particulate-bone-powder-and-alginate-in-vitro
#16
Ye Tian, Li-Huang Cui, Shou-Yang Xiang, Wen-Xiao Xu, De-Chun Chen, Rui Fu, Chang-Long Zhou, Xiao-Qi Liu, Yu-Fu Wang, Xin-Tao Wang
Autogenous bone graft is the best for spinal fusion in clinics, however, lacking sources, bleeding and infection are limited its practice. Seeking alternative materials are urgent for orthopaedic surgeon. Here, we evaluated osteoblast-oriented differentiation of rabbit BMSCs by co-culturing with composite scaffolds constructed using silicon-substituted-CaP-fine particulate bone powder-alginate. Using CCk8-kit, biocompatibility was evaluated by testing BMSCs proliferation; morphology and survival of osteoblasts within scaffolds were observed using EM and HE staining; growth factors and related genes were detected using RT-PCR...
July 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28705754/progression-of-lyme-disease-to-bell-s-palsy-despite-treatment-with-doxycycline
#17
Luis A Marcos, Zengmin Yan
A 54 year-old healthy woman presented to the emergency department with a right sided facial paralysis. About 3 weeks ago, she woke up and noticed an attached engorged tick in her right lower extremity. A week later, she noticed a mild to moderate right jaw pain which progressed to a severe right facial pain so she visited her doctor. On physical, II to XII cranial nerve examination was unremarkable. Doppler ultrasound did not show any vascular abnormalities in temporal artery. Her inflammatory markers were within normal limits (C-reactive protein:0...
July 10, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28704608/the-electron-bifurcating-fixabcx-protein-complex-from-azotobacter-vinelandii-generation-of-low-potential-reducing-equivalents-for-nitrogenase-catalysis
#18
Rhesa Ledbetter, Amaya M Garcia-Costas, Carolyn E Lubner, David W Mulder, Monika Tokmina-Lukaszewska, Jacob H Artz, Angela Patterson, Timothy Magnuson, Zackary J Jay, H Diessel Duan, Jacquelyn Miller, Mary H Plunkett, John P Hoben, Brett M Barney, Ross P Carlson, Anne-Frances Miller, Brian Bothner, Paul W King, John W Peters, Lance C Seefeldt
The biological reduction of dinitrogen (N2) to ammonia (NH3) by nitrogenase is an energetically demanding reaction that requires low-potential electrons and ATP; however, pathways used to deliver the electrons from central metabolism to the reductants of nitrogenase, ferredoxin or flavodoxin, remain unknown for many diazotrophic microbes. The FixABCX protein complex has been proposed to reduce flavodoxin or ferredoxin using NADH as the electron donor in a process known as electron bifurcation. Herein, the FixABCX complex from Azotobacter vinelandii was purified and demonstrated to catalyze an electron bifurcation reaction: oxidation of NADH (Em= -320 mV) coupled to reduction of flavodoxin semiquinone (Em= -460 mV) and reduction of coenzyme Q (Em= +10 mV)...
July 13, 2017: Biochemistry
https://www.readbyqxmd.com/read/28704285/cricothyroidotomy-in-situ-simulation-curriculum-cric-study-training-residents-for-rare-procedures
#19
Andrew Petrosoniak, Agnes Ryzynski, Gerald Lebovic, Karen Woolfrey
INTRODUCTION: Technical skill acquisition for rare procedures can be challenging given the few real-life training opportunities. In situ simulation (ISS), a training technique that takes place in the actual workplace, is a promising method to promote environmental fidelity for rare procedures. This study evaluated a simulation-based technical skill curriculum for cricothyroidotomy using deliberate practice, followed by an ISS evaluation session. METHODS: Twenty emergency medicine residents participated in a two-part curriculum to improve cricothryoidotomy performance...
April 2017: Simulation in Healthcare: Journal of the Society for Simulation in Healthcare
https://www.readbyqxmd.com/read/28704257/the-combination-of-cyp3a4-22-and-cyp3a5-3-single-nucleotide-polymorphisms-determines-tacrolimus-dose-requirement-after-kidney-transplantation
#20
Nuria Lloberas, Laure Elens, Ines Llaudó, Ariadna Padullés, Teun van Gelder, Dennis A Hesselink, Helena Colom, Franc Andreu, Joan Torras, Oriol Bestard, Josep M Cruzado, Salvador Gil-Vernet, Ron van Schaik, Josep M Grinyó
INTRODUCTION: Tacrolimus (Tac) has a narrow therapeutic window and shows large between-patient pharmacokinetic variability. As a result, over-immunosuppression and under-immunosuppression are frequently encountered in daily clinical practice. Unraveling the impact of genetic polymorphisms on Tac pharmacokinetics may help to refine therapy. In this study, the associations of single-nucleotide polymorphisms (SNPs) in drug-metabolizing enzymes (CYP3A) with Tac pharmacokinetics were investigated in renal transplant recipients...
July 12, 2017: Pharmacogenetics and Genomics
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