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https://www.readbyqxmd.com/read/28531139/dual-component-gelatinous-peptide-reactive-oligomer-formulations-as-conduit-material-and-luminal-filler-for-peripheral-nerve-regeneration
#1
Caroline Kohn-Polster, Divya Bhatnagar, Derek J Woloszyn, Matthew Richtmyer, Annett Starke, Alexandra H Springwald, Sandra Franz, Michaela Schulz-Siegmund, Hilton M Kaplan, Joachim Kohn, Michael C Hacker
Toward the next generation of nerve guidance conduits (NGCs), novel biomaterials and functionalization concepts are required to address clinical demands in peripheral nerve regeneration (PNR). As a biological polymer with bioactive motifs, gelatinous peptides are promising building blocks. In combination with an anhydride-containing oligomer, a dual-component hydrogel system (cGEL) was established. First, hollow cGEL tubes were fabricated by a continuous dosing and templating process. Conduits were characterized concerning their mechanical strength, in vitro and in vivo degradation and biocompatibility...
May 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28530279/bifunctional-antimicrobial-conjugates-and-hybrid-antimicrobials
#2
REVIEW
P Klahn, M Brönstrup
Covering: up to the end of 2016Novel antimicrobial drugs are continuously needed to counteract bacterial resistance development. An innovative molecular design strategy for novel antibiotic drugs is based on the hybridization of an antibiotic with a second functional entity. Such conjugates can be grouped into two major categories. In the first category (antimicrobial hybrids), both functional elements of the hybrid exert antimicrobial activity. Due to the dual targeting, resistance development can be significantly impaired, the pharmacokinetic properties can be superior compared to combination therapies with the single antibiotics, and the antibacterial potency is often enhanced in a synergistic manner...
May 22, 2017: Natural Product Reports
https://www.readbyqxmd.com/read/28528961/gp5-of-porcine-reproductive-and-respiratory-syndrome-virus-prrsv-as-a-target-for-homologous-and-broadly-neutralizing-antibodies
#3
REVIEW
Luca N Popescu, Benjamin R Trible, Nanhua Chen, Raymond R R Rowland
Virus neutralization (VN) responses range from narrowly focused antibodies with only homologous neutralizing activity against the virus used for infection, to antibodies that can neutralize both Type 1 and Type 2 viruses, referred to as broadly neutralizing antibody (bnAb). Even though neutralizing epitopes are likely distributed among several structural glycoproteins, this paper focuses on the ectodomain region of GP5 as a model system for investigating the role for neutralizing and non-neutralizing antibodies in protection and disease...
April 29, 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28528546/predictors-of-drinking-water-boiling-and-bottled-water-consumption-in-rural-china-a-hierarchical-modeling-approach
#4
Alasdair Cohen, Q Zhang, Qing Luo, Yong Tao, John Colford, Isha Ray
Approximately two billion people drink unsafe water. Boiling is the most commonly used household water treatment (HWT) method globally and in China. HWT can make water safer, but sustained adoption is rare and bottled water consumption is growing. To successfully promote HWT, an understanding of associated socioeconomic factors is critical. We collected survey data and water samples from 450 rural households in Guangxi Province, China. Covariates were grouped into blocks to hierarchically construct modified Poisson models and estimate risk ratios (RR) associated with boiling methods, bottled water, and untreated water...
May 20, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28526465/-selective-lobar-blockade-with-a-coopdech-blocker-combined-with-a-double-lumen-endotracheal-tube-for-lung-metastases-resection-by-laser
#5
Patricia Cruz, Hugo David Orozco, Ignacio Garutti Martinez, Gloria Hernández Fernández
In recent years, laser resection of lung metastases has been established as the standard procedure worldwide. To avoid airway fire, it is necessary to collapse the surgical lung. The selective lobar bronchial blockade is a technique that allows one-lung ventilation while the operated lobe is collapsed in patients with previous pulmonary resection requiring subsequent resection or with limited pulmonary reserve. We report a clinical case about our experience of a selective lobar bronchial blockade technique with a bronchial blocker (Coopdech endobronchial blocker) that was employed successfully with a double-lumen endotracheal tube in a patient with previous contralateral pulmonary resection who was scheduled for atypical resections of pulmonary metastases by laser...
May 16, 2017: Revista Brasileira de Anestesiologia
https://www.readbyqxmd.com/read/28520165/targeting-ccl4-induced-liver-fibrosis-by-rna-interference-mediated-inhibition-of-cyclin-e1-in-mice
#6
Jörg-Martin Bangen, Linda Hammerich, Roland Sonntag, Maike Baues, Ute Haas, Daniela Lambertz, Thomas Longerich, Twan Lammers, Frank Tacke, Christian Trautwein, Christian Liedtke
Initiation and progression of liver fibrosis requires proliferation and activation of resting hepatic stellate cells (HSC). Cyclin E1 (CcnE1) is the regulatory subunit of the Cyclin-dependent Kinase 2 (Cdk2) and controls cell cycle re-entry. We have recently shown that genetic inactivation of CcnE1 prevents activation, proliferation and survival of HSC and protects from liver fibrogenesis. The aim of the present study was to translate these findings into pre-clinical applications using an RNAi-based approach...
May 18, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28518138/betulin-exhibits-anti-inflammatory-activity-in-lps-stimulated-macrophages-and-endotoxin-shocked-mice-through-an-ampk-akt-nrf2-dependent-mechanism
#7
Xinxin Ci, Junfeng Zhou, Hongming Lv, Qinlei Yu, Liping Peng, Shucheng Hua
Continued oxidative stress can lead to chronic inflammation, which in turn could mediate most chronic diseases including cancer. Nuclear factor erythroid 2-related factor (Nrf2), a critical transcriptional activator for antioxidative responses, has envolved to be an attractive drug target for the treatment or prevention of human diseases. In the present study, we investigated the effects and mechanisms of betulin on Nrf2 activation and its involvement in the lipopolysaccharide (LPS)-triggered inflammatory system...
May 18, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28510460/effects-of-membrane-defects-and-polymer-hydrophobicity-on-networking-kinetics-of-vesicles
#8
Yan Xia, Hyun-Sook Jang, Zhiqiang Shen, Geoffrey D Bothun, Ying Li, Mu-Ping Nieh
The kinetics of clustering unilamellar vesicles induced by inverse Pluronics, poly(propylene oxide)m-poly(ethylene oxide)n-poly(propylene oxide)m, POm-EOn-POm, were investigated via experiments and molecular dynamic simulations. Two important factors for controlling the networking kinetics are the membrane defects presumably located at the interfacial region between two lipid domains induced by acyl chain mismatch, and the polymer hydrophobicity. As expected, the clustering rate increases significantly with increasing bilayer defects on the membrane where the insertion of PPO is likely to take place because of the reduced energy barrier for the insertion of PO...
May 16, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28507972/bilateral-coracoid-avulsion-fractures-with-unilateral-anterior-instability-with-glenoid-bone-loss-use-of-avulsed-fragment-for-reconstruction-of-glenoid
#9
Prateek Kumar Gupta, Ashis Acharya, Amit Mourya
INTRODUCTION: Coracoid fractures are often missed since the fracture is not visualized in a routine anteroposterior view of the shoulder and special views are not ordered. Shoulder dislocation is common but it is rare to have a dislocation with a coracoid fracture. The purpose of this paper is to present the rare occurrence of bilateral coracoid fractures in a patient with unilateral anterior shoulder instability managed using the same fractured coracoid fragment by the latarjet procedure...
November 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28507243/modular-organization-of-the-nusa-and-nusg-stimulated-rna-polymerase-pause-signal-that-participates-in-the-bacillus-subtilis-trp-operon-attenuation-mechanism
#10
Smarajit Mondal, Alexander V Yakhnin, Paul Babitzke
The Bacillus subtilis trpEDCFBA operon is regulated by a transcription attenuation mechanism in which tryptophan-activated TRAP binds to the nascent transcript and blocks formation of an antiterminator structure such that formation of an overlapping intrinsic terminator causes termination in the 5' untranslated region (5' UTR). In the absence of bound TRAP the antiterminator forms and transcription continues into the trp genes. RNA polymerase pauses at positions U107 and U144 in the 5' UTR. The general transcription elongation factors NusA and NusG stimulate pausing at both positions...
May 15, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28507156/rna-primer-primase-complexes-serve-as-the-signal-for-polymerase-recycling-and-okazaki-fragment-initiation-in-t4-phage-dna-replication
#11
Michelle M Spiering, Philip Hanoian, Swathi Gannavaram, Stephen J Benkovic
The opposite strand polarity of duplex DNA necessitates that the leading strand is replicated continuously whereas the lagging strand is replicated in discrete segments known as Okazaki fragments. The lagging-strand polymerase sometimes recycles to begin the synthesis of a new Okazaki fragment before finishing the previous fragment, creating a gap between the Okazaki fragments. The mechanism and signal that initiate this behavior-that is, the signaling mechanism-have not been definitively identified. We examined the role of RNA primer-primase complexes left on the lagging ssDNA from primer synthesis in initiating early lagging-strand polymerase recycling...
May 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28507027/mycobacterium-tuberculosis-lipoprotein-mpt83-induces-apoptosis-of-infected-macrophages-by-activating-the-tlr2-p38-cox-2-signaling-pathway
#12
Lin Wang, Mianyong Zuo, Hao Chen, Siyu Liu, Xiangyang Wu, Zhenling Cui, Hua Yang, Haipeng Liu, Baoxue Ge
Tuberculosis caused by Mycobacterium tuberculosis continues to pose a serious global health threat. The attenuated Mycobacterium bovis bacillus Calmette-Guérin, as the only licensed vaccine, has limited protective efficacy against TB. The development of more effective antituberculosis vaccines is urgent and demands for further identification and understanding of M. tuberculosis Ags. MPT83 (Rv2873), a secreted mycobacterial lipoprotein, has been applied into subunit vaccine development and shown protective effects against M...
May 15, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28506648/antegrade-versus-continuous-retrograde-del-nido-cardioplegia-in-the-david-i-operation
#13
Xuan Jiang, Tianxiang Gu, Enyi Shi, Chun Wang, Zongyi Xiu, Guangwei Zhang
BACKGROUND: The efficacy of continuous retrograde del Nido cardioplegia for myocardial protection is still controversial. We hypothesised that antegrade and retrograde cardioplegia offer equivalent safety for myocardial protection in the David I procedure. METHODS: We retrospectively reviewed 33 patients undergoing the David I operation with antegrade or retrograde del Nido solution from June 2014 to January 2016. The outcomes were compared. The follow-up was 1 month to 15 months...
April 26, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28506538/epitope-specific-immunotherapy-targeting-cd4-positive-t-cells-in-coeliac-disease-two-randomised-double-blind-placebo-controlled-phase-1-studies
#14
Gautam Goel, Tim King, A James Daveson, Jane M Andrews, Janakan Krishnarajah, Richard Krause, Gregor J E Brown, Ronald Fogel, Charles F Barish, Roger Epstein, Timothy P Kinney, Philip B Miner, Jason A Tye-Din, Adam Girardin, Juha Taavela, Alina Popp, John Sidney, Markku Mäki, Kaela E Goldstein, Patrick H Griffin, Suyue Wang, John L Dzuris, Leslie J Williams, Alessandro Sette, Ramnik J Xavier, Ludvig M Sollid, Bana Jabri, Robert P Anderson
BACKGROUND: A gluten-free diet is the only means to manage coeliac disease, a permanent immune intolerance to gluten. We developed a therapeutic vaccine, Nexvax2, designed to treat coeliac disease. Nexvax2 is an adjuvant-free mix of three peptides that include immunodominant epitopes for gluten-specific CD4-positive T cells. The vaccine is intended to engage and render gluten-specific CD4-positive T cells unresponsive to further antigenic stimulation. We assessed the safety and pharmacodynamics of the vaccine in patients with coeliac disease on a gluten-free diet...
May 11, 2017: Lancet. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28504587/a-single-intercostal-space-thoracoscopic-approach-for-minimally-invasive-ivor-lewis-esophagectomy
#15
Saibo Pan, Lian Wang, Ming Wu, Qi Wang, Gang Shen, Gang Chen
OBJECTIVE: We present a laparoscopic and single intercostal space thoracoscopic approach (SICS group) for Ivor Lewis minimally invasive esophagectomy (MIE) and provide postoperative analgesia with a continuous multiple intercostal nerve blocking technique. The characters of this technique are evaluated. MATERIALS AND METHODS: From October 2015 to April 2016, 18 consecutive patients with esophageal cancer were treated with Ivor Lewis MIE by a SICS group. Moreover, from July 2014 to September 2015, 48 patients with esophageal cancer received Ivor Lewis MIE by four-port video-assisted thoracic surgery (VATS) approach...
May 15, 2017: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/28503840/a-critical-note-on-treatment-of-a-severe-diltiazem-intoxication-high-dose-calcium-and-glucagon-infusions
#16
N M Van Veggel, G J Van der Veen, T C Jansen, E M Westerman
The morbidity and mortality of a severe calcium channel blocker intoxication is high due to serious toxic cardiac effects. Its treatment is supported by low-quality evidence from heterogeneous literature. We describe a case of a severe diltiazem intoxication and critically appraise the efficacy and role of high-dose calcium and glucagon infusions. A 53-year-old woman was admitted to the emergency department with a cardiogenic shock with complete AV block, not responding to atropine, isoprenaline and an external pacemaker...
May 15, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28501548/facilitation-and-interference-in-naming-a-consequence-of-the-same-learning-process
#17
Julie W Hughes, Tatiana T Schnur
Our success with naming depends on what we have named previously, a phenomenon thought to reflect learning processes. Repeatedly producing the same name facilitates language production (i.e., repetition priming), whereas producing semantically related names hinders subsequent performance (i.e., semantic interference). Semantic interference is found whether naming categorically related items once (continuous naming) or multiple times (blocked cyclic naming). A computational model suggests that the same learning mechanism responsible for facilitation in repetition creates semantic interference in categorical naming (Oppenheim, Dell, & Schwartz, 2010)...
May 11, 2017: Cognition
https://www.readbyqxmd.com/read/28500775/vaccines-against-malaria-still-a-long-way-to-go
#18
REVIEW
Kai Matuschewski
Several species of Plasmodium cause a broad spectrum of human disease that range from nausea and fever to severe anemia, cerebral malaria, and multi-organ failure. In malaria-endemic countries continuous exposure to Plasmodium sporozoite inoculations and subsequent blood infections elicit only partial and short-lived immunity, which gradually develops over many years of parasite exposure and multiple clinical episodes. The ambitious goal of malaria vaccinology over the past 70 years has been to develop an immunization strategy that mounts protection superior to naturally acquired immunity...
May 13, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28500755/enhanced-fib-sem-systems-for-large-volume-3d-imaging
#19
C Shan Xu, Kenneth J Hayworth, Zhiyuan Lu, Patricia Grob, Ahmed M Hassan, José G García-Cerdán, Krishna K Niyogi, Eva Nogales, Richard J Weinberg, Harald F Hess
Focused Ion Beam Scanning Electron Microscopy (FIB-SEM) can automatically generate 3D images with superior z-axis resolution, yielding data that needs minimal image registration and related post-processing. Obstacles blocking wider adoption of FIB-SEM include slow imaging speed and lack of long-term system stability, which caps the maximum possible acquisition volume. Here we present techniques that accelerate image acquisition while greatly improving FIB-SEM reliability, allowing the system to operate for months and generating continuously imaged volumes > 10(6) µm(3)...
May 13, 2017: ELife
https://www.readbyqxmd.com/read/28500718/rpe65-and-the-accumulation-of-retinyl-esters-in-mouse-retinal-pigment-epithelium
#20
Colleen Sheridan, Nicholas P Boyer, Rosalie K Crouch, Yiannis Koutalos
The RPE65 protein of the retinal pigment epithelium (RPE) enables the conversion of retinyl esters to the visual pigment chromophore 11-cis retinal. Fresh 11-cis retinal is generated from retinyl esters following photoisomerization of the visual pigment chromophore to all-trans during light detection. Large amounts of esters accumulate in Rpe65(-/-) mice, indicating their continuous formation when 11-cis retinal generation is blocked. We hypothesized that absence of light, by limiting the conversion of esters to 11-cis retinal, would also result in the build-up of retinyl esters in the RPE of wild-type mice...
May 2017: Photochemistry and Photobiology
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