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https://www.readbyqxmd.com/read/29458189/impact-of-time-of-day-on-diffusivity-measures-of-brain-tissue-derived-from-diffusion-tensor-imaging
#1
Cibu Thomas, Neda Sadeghi, Amrita Nayak, Aaron Trefler, Joelle Sarlls, Chris Baker, Carlo Pierpaoli
Diurnal fluctuations in MRI measures of structural and functional properties of the brain have been reported recently. These fluctuations may have a physiological origin, since they have been detected using different MRI modalities, and cannot be explained by factors that are typically known to confound MRI measures. While preliminary evidence suggests that measures of structural properties of the brain based on diffusion tensor imaging (DTI) fluctuate as a function of time-of-day (TOD), the underlying mechanism has not been investigated...
February 16, 2018: NeuroImage
https://www.readbyqxmd.com/read/29458150/pink1-protects-auditory-hair-cells-and-spiral-ganglion-neurons-from-cisplatin-induced-ototoxicity-via-inducing-autophagy-and-inhibiting-jnk-signaling-pathway
#2
Qianqian Yang, Gaoying Sun, Haiyan Yin, Hongrui Li, Zhixin Cao, Jinghan Wang, Meijuan Zhou, Haibo Wang, Jianfeng Li
Phosphatase and tensin homologue (PTEN)-induced putative kinase 1 (PINK1) gene encodes a serine/threonine kinase, which acts as a molecular sensor of mitochondrial health necessary for mitochondrial quality control. The present study was designed to examine whether PINK1 expressed in C57BL/6 murine cochlea and HEI-OC1 cells and, if so, to investigate the possible mechanisms underlying the action of PINK1 in cisplatin-induced death of sensory hair cells (HCs) and spiral ganglion neurons (SGNs) in vitro. The expression pattern of PINK1, formation of parkin particles, and autophagy were determined by immunofluorescent staining...
February 16, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29458131/inhibition-of-hepatitis-b-virus-replication-via-hbv-dna-cleavage-by-cas9-from-staphylococcus-aureus
#3
Yu Liu, Miaoxian Zhao, Mingxing Gong, Ying Xu, Cantao Xie, Haohui Deng, Xueying Li, Hongkai Wu, Zhanhui Wang
Chronic hepatitis B virus (HBV) infection is difficult to cure due to the presence of covalently closed circular DNA (cccDNA). Accumulating evidence indicates that the CRISPR/Cas9 system effectively disrupts HBV genome, including cccDNA, in vitro and in vivo. However, efficient delivery of CRISPR/Cas9 system to the liver or hepatocytes using an adeno-associated virus (AAV) vector remains challenging due to the large size of Cas9 from Streptococcus pyogenes (Sp). The recently identified Cas9 protein from Staphylococcus aureus (Sa) is smaller than SpCas9 and thus is able to be packaged into the AAV vector...
February 16, 2018: Antiviral Research
https://www.readbyqxmd.com/read/29458074/subthalamic-nucleus-stimulation-dopaminergic-treatment-and-impulsivity-in-parkinson-s-disease
#4
Frédérique Fluchère, Borís Burle, Franck Vidal, Wery van den Wildenberg, Tatiana Witjas, Alexandre Eusebio, Jean-Philippe Azulay, Thierry Hasbroucq
BACKGROUND: Deep brain stimulation of the subthalamic nucleus (STN DBS) is known to increase response speed and lower response accuracy in Parkinson's disease (PD) patients. It has been proposed that this speed-accuracy tradeoff is due to enhanced sensitivity of the motor system to sensory information. An alternative possibility is that this effect is due to weakened suppressive processes. The two alternative interpretations can be tested by analyzing the electromyographic activity (EMG) of the response agonists when the patients perform conflict reaction time tasks...
February 16, 2018: Neuropsychologia
https://www.readbyqxmd.com/read/29458053/circulating-bile-acids-in-healthy-adults-respond-differently-to-a-dietary-pattern-characterized-by-whole-grains-legumes-and-fruits-and-vegetables-compared-to-a-diet-high-in-refined-grains-and-added-sugars-a-randomized-controlled-crossover-feeding-study
#5
Bigina N R Ginos, Sandi L Navarro, Yvonne Schwarz, Haiwei Gu, Dongfang Wang, Timothy W Randolph, Ali Shojaie, Meredith A J Hullar, Paul D Lampe, Mario Kratz, Marian L Neuhouser, Daniel Raftery, Johanna W Lampe
OBJECTIVE: The effects of diets high in refined grains on biliary and colonic bile acids have been investigated extensively. However, the effects of diets high in whole versus refined grains on circulating bile acids, which can influence glucose homeostasis and inflammation through activation of farnesoid X receptor (FXR) and G protein-coupled bile acid receptor 1 (TGR5), have not been studied. MATERIALS AND METHODS: We conducted a secondary analysis from a randomized controlled crossover feeding trial (NCT00622661) in 80 healthy adults (40 women/40 men, age 18-45 years) from the greater Seattle Area, half of which were normal weight (BMI 18...
February 16, 2018: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29458023/structural-characterization-of-the-hcov-229e-fusion-core
#6
Wei Zhang, Qianqian Zheng, Mengrong Yan, Xiaobo Chen, Haitao Yang, Weihong Zhou, Zihe Rao
HCoV-229E spike (S) protein mediates virion attachment to cells and subsequent fusion of the viral and cellular membranes. This protein is composed of an N-terminal receptor-binding domain (S1) and a C-terminal trans-membrane fusion domain (S2). S2 contains a highly conserved heptad repeat 1 and 2 (HR1 and HR2). In this study, the HRs sequences were designed and connected with a flexible linker. The recombinant fusion core protein was crystallized and its structure was solved at a resolution of 2.45 Å. Then we characterized the binding of HR1s and HR2s via both sequence alignment and structural analysis...
February 16, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29457991/protection-of-sheep-by-vaccination-against-experimental-challenge-with-leptospira-borgpetersenii-serovar-hardjo-and-l-interrogans-serovar-pomona
#7
W J Clough, P R Little, A Hodge, V C Chapman, D K Holz
AIMS: To evaluate a multivalent leptospiral and clostridial vaccine for prevention of renal colonisation and urinary shedding in sheep, following experimental challenge with New Zealand strains of Leptospira borgpetersenii serovar Hardjo type Hardjobovis and Leptospira interrogans serovar Pomona. METHODS: Two separate but similarly designed studies were conducted. In both studies, Romney cross lambs, aged 9-11 weeks, were randomly allocated to a vaccinated group and a control group...
February 19, 2018: New Zealand Veterinary Journal
https://www.readbyqxmd.com/read/29457986/effect-of-oral-stimulation-on-feeding-performance-and-weight-gain-in-preterm-neonates-a-randomised-controlled-trial
#8
Pareshkumar A Thakkar, H R Rohit, Rashmi Ranjan Das, Ukti P Thakkar, Amitabh Singh
Background In preterm infants, oral stimulation enhances muscle tone and movement which facilitates normal oral motor developmental patterns improving oral feeding performance. Aim To study the effects on feeding performance, transition to independent oral feeding, weight gain and length of hospital stay of an oral stimulation programme in preterm neonates. Study design This randomised controlled trial was conducted in a tertiary care teaching hospital over a period of 10 months. Altogether, 102 preterm neonates (30-34 weeks gestation) were randomised into the intervention group (oro-motor stimulation for 5 min twice a day, n = 51) or the control group (routine care only, n = 51)...
February 19, 2018: Paediatrics and International Child Health
https://www.readbyqxmd.com/read/29457973/pyrazole-tetrazole-hybrid-bearing-the-trinitromethyl-fluorodinitromethyl-or-difluoroamino-dinitromethyl-groups-high-performance-energetic-materials
#9
Aleksei B Sheremetev, Igor L Dalinger, Nikita V Muravyev, Kyrill Yu Suponitsky, Aleksandr V Kormanov
High nitrogen compounds have acquired great scientific interest and technological importance because of their unique energy content, and they find diverse applications in many fields of science and technology. Understanding of structure-property relationship trends as well as how to modify them is of paramount importance for their further improvement. Herein, we have used installation of oxygen-rich modules, C(NO2)3, C(NO2)2F or C(NO2)2NF2, to a endothermic framework, that is combination of nitropyrazole unit and tetrazole ring, as a way to design novel energetic compounds...
February 19, 2018: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/29457972/a-stable-metal-organic-framework-featuring-local-buffer-environment-for-carbon-dioxide-fixation
#10
Hongming He, Qi Sun, Wenyang Gao, Jason A Perman, Fuxing Sun, Guangshan Zhu, Briana Aguila, Katherine Forrest, Brian Space, Shengqian Ma
A majority of metal-organic frameworks (MOFs) fail to preserve their physical and chemical properties after exposure to acidic, neutral, or alkaline aqueous solutions, therefore limiting their practical applications in many areas. The strategy demonstrated herein is the design and synthesis of an organic ligand that behaves as a buffer to drastically boost the aqueous stability of a porous MOF (JUC-1000), which maintains its structural integrity at low and high pH values. The local buffer environment resulting from the weak acid-base pairs of the custom-designed organic ligand also greatly facilitates the performance of JUC-1000 in the chemical fixation of carbon dioxide under ambient conditions, outperforming a series of benchmark catalysts...
February 19, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29457956/gene-drives-to-fight-malaria-current-state-and-future-directions
#11
Andrew M Hammond, Roberto Galizi
Self-propagating gene drive technologies have a number of desirable characteristics that warrant their development for the control of insect pest and vector populations, such as the malaria-transmitting mosquitoes. Theoretically easy to deploy and self-sustaining, these tools may be used to generate cost-effective interventions that benefit society without obvious bias related to wealth, age or education. Their species-specific design offers the potential to reduce environmental risks and aim to be compatible and complementary with other control strategies, potentially expediting the elimination and eradication of malaria...
February 19, 2018: Pathogens and Global Health
https://www.readbyqxmd.com/read/29457928/an-atraumatic-retractor-for-interdisciplinary-use-in-conventional-laparoscopy-and-robotic-surgery
#12
Ibrahim Alkatout
BACKGROUND: The removal of obstacles from the surgical field is a crucial aspect of any procedure in gynecological, urological or visceral laparoscopic surgery. Reliable instruments and skilled assistance are essential for the smooth execution of procedures. Blunt forceps are commonly used to keep tissue away from the operating field. The range of existing instruments has been enhanced by the introduction of laparoscopic retractors. However, no laparoscopic retractor can be used without causing tissue damage...
February 19, 2018: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29457926/the-contribution-of-theory-to-the-design-delivery-and-evaluation-of-interprofessional-curricula-beme-guide-no-49
#13
Sarah Hean, Christopher Green, Elizabeth Anderson, Debra Morris, Carol John, Richard Pitt, Cath O'Halloran
BACKGROUND: Interprofessional curricula have often lacked explicit reference to theory despite calls for a more theoretically informed field that illuminates curricular assumptions and justifies curricular practices. AIM: To review the contributions of theory to the design, delivery, and evaluation of interprofessional curricula. METHODS: Four databases were searched (1988-2015). Studies demonstrating explicit and a high-quality contribution of theory to the design, delivery or evaluation of interprofessional curricula were included...
February 19, 2018: Medical Teacher
https://www.readbyqxmd.com/read/29457808/cds-nanosphere-decorated-hollow-polyhedral-zco-derived-from-a-metal-organic-framework-mof-for-effective-photocatalytic-water-evolution
#14
Wenxia Chen, Jiasheng Fang, Yiwei Zhang, Guangliang Chen, Shuo Zhao, Chao Zhang, Ran Xu, Jiehua Bao, Yuming Zhou, Xin Xiang
Semiconductor nanostructures have received considerable attention in the field of photocatalytic hydrogen evolution. However, eco-friendly, high efficiency, and low-cost semiconductor materials are still desired. In consideration of this, herein, we design a new and economic noble-metal-free CdS/Znx Co3-x O4 (CdS/ZCO) nanohybrid photocatalyst using a metal-organic framework (MOF) template, which is a framework structure composed of organic ligands and metal ion nodes with different numbers of connections. The as-prepared CdS/ZCO composites with a large specific surface area and porous hollow structure exhibit remarkable catalytic activity and high stability for hydrogen generation...
February 19, 2018: Nanoscale
https://www.readbyqxmd.com/read/29457760/a-systematic-review-of-serious-games-in-medical-education-quality-of-evidence-and-pedagogical-strategy
#15
Iouri Gorbanev, Sandra Agudelo-Londoño, Rafael A González, Ariel Cortes, Alexandra Pomares, Vivian Delgadillo, Francisco J Yepes, Óscar Muñoz
INTRODUCTION: The literature shows an optimistic landscape for the effectiveness of games in medical education. Nevertheless, games are not considered mainstream material in medical teaching. Two research questions that arise are the following: What pedagogical strategies do developers use when creating games for medical education? And what is the quality of the evidence on the effectiveness of games? METHODS: A systematic review was made by a multi-disciplinary team of researchers following the Cochrane Collaboration Guidelines...
December 2018: Medical Education Online
https://www.readbyqxmd.com/read/29457674/a-review-of-brain-stimulation-methods-to-treat-substance-use-disorders
#16
REVIEW
Alexandria S Coles, Karolina Kozak, Tony P George
BACKGROUND: Substance use disorders (SUDs) are a leading cause of disability worldwide. While several pharmacological and behavioral treatments for SUDs are available, these may not be effective for all patients. Recent studies using non-invasive neuromodulation techniques including Repetitive Transcranial Magnetic Stimulation (rTMS), Transcranial Direct Current Stimulation (tDCS), and Deep Brain Stimulation (DBS) have shown promise for SUD treatment. OBJECTIVE: Multiple studies were evaluated investigating the therapeutic potential of non-invasive brain stimulation techniques in treatment of SUDs...
February 19, 2018: American Journal on Addictions
https://www.readbyqxmd.com/read/29457640/application-of-adaptive-laboratory-evolution-to-overcome-a-flux-limitation-in-an-escherichia-coli-production-strain
#17
Kento Tokuyama, Yoshihiro Toya, Takaaki Horinouchi, Chikara Furusawa, Fumio Matsuda, Hiroshi Shimizu
Gene deletion strategies using flux balance analysis (FBA) have improved the growth-coupled production of various compounds. However, the productivities were often below the expectation because the cells failed to adapt to these genetic perturbations. Here, we demonstrate the productivity of the succinate of the designed gene deletion strain was improved by adaptive laboratory evolution (ALE). Although FBA predicted deletions of adhE-pykAF-gldA-pflB lead to produce succinate from glycerol with a yield of 0...
February 19, 2018: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/29457537/effects-of-binaural-spatialization-in-wireless-microphone-systems-for-hearing-aids-on-normal-hearing-and-hearing-impaired-listeners
#18
Gilles Courtois, Hervé Lissek, Philippe Estoppey, Yves Oesch, Xavier Gigandet
Little is known about the perception of artificial spatial hearing by hearing-impaired subjects. The purpose of this study was to investigate how listeners with hearing disorders perceived the effect of a spatialization feature designed for wireless microphone systems. Forty listeners took part in the experiments. They were arranged in four groups: normal-hearing, moderate, severe, and profound hearing loss. Their performance in terms of speech understanding and speaker localization was assessed with diotic and binaural stimuli...
January 2018: Trends in Hearing
https://www.readbyqxmd.com/read/29457464/assessment-of-dna-methylation-patterns-in-the-bone-and-cartilage-of-a-nonhuman-primate-model-of-osteoarthritis
#19
Genevieve Housman, Lorena M Havill, Ellen E Quillen, Anthony G Comuzzie, Anne C Stone
Objective Osteoarthritis (OA) affects humans and several other animals. Thus, the mechanisms underlying this disorder, such as specific skeletal tissue DNA methylation patterns, may be evolutionary conserved. However, associations between methylation and OA have not been readily studied in nonhuman animals. Baboons serve as important models of disease and develop OA at rates similar to those in humans. Therefore, this study investigated the associations between methylation and OA in baboons to advance the evolutionary understanding of OA...
February 1, 2018: Cartilage
https://www.readbyqxmd.com/read/29457447/effects-of-chain-orientation-in-self-organized-buffer-layers-based-on-poly-3-alkylthiophene-s-for-organic-photovoltaics
#20
Fanji Wang, Kazuhito Hashimoto, Hiroshi Segawa, Keisuke Tajima
Surface-segregated monolayers (SSMs) based on two poly(3-alkylthiophene)s with semifluoroalkyl groups at either the side chains (P3DDFT) or one end of the main chain (P3BT-F17) were used as self-organized buffer layers at the electrode interfaces in bulk heterojunction (BHJ) organic photovoltaic devices (OPVs). Both of the SSMs greatly shifted the vacuum levels of the BHJ films at the surface due to the aligned permanent dipole moments of the semifluoroalkyl chains. Hole extraction in the BHJ of poly(3-hexylthiophene) (P3HT):[6,6]-phenyl C61-butyric acid methyl ester (PCBM) became more efficient in the presence of the P3DDFT buffer layer, resulting in an improved power conversion efficiency...
February 19, 2018: ACS Applied Materials & Interfaces
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