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https://www.readbyqxmd.com/read/28446771/monitoring-global-protein-thiol-oxidation-and-protein-s-mycothiolation-in-mycobacterium-smegmatis-under-hypochlorite-stress
#1
Melanie Hillion, Jörg Bernhardt, Tobias Busche, Martina Rossius, Sandra Maaß, Dörte Becher, Mamta Rawat, Markus Wirtz, Rüdiger Hell, Christian Rückert, Jörn Kalinowski, Haike Antelmann
Mycothiol (MSH) is the major low molecular weight (LMW) thiol in Actinomycetes. Here, we used shotgun proteomics, OxICAT and RNA-seq transcriptomics to analyse protein S-mycothiolation, reversible thiol-oxidations and their impact on gene expression in Mycobacterium smegmatis under hypochlorite stress. In total, 58 S-mycothiolated proteins were identified under NaOCl stress that are involved in energy metabolism, fatty acid and mycolic acid biosynthesis, protein translation, redox regulation and detoxification...
April 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28444853/experimental-type-2-diabetes-induction-reduces-serum-vaspin-but-not-serum-omentin-in-wistar-rats
#2
Cynthia Aparecida de Castro, Karina Ana da Silva, Marina Molina Buffo, Karina Nogueira Zambone Pinto, Fernanda de Oliveira Duarte, Keico Okino Nonaka, Fernanda de Freitas Aníbal, Ana Cláudia Garcia de Oliveira Duarte
Vaspin and omentin are adipose tissue adipokines that have often been related to obesity and its comorbidities. The aim of this study was to investigate the behaviour of serum omentin and vaspin in models of type 2 diabetes. To do this, Wistar rats (~200 g) were randomly divided into two groups: a non-diabetic group (n = 6) and a diabetic group fed on a high-fat diet (n = 6) and a low dose of streptozotocin (Sigma(®) ). All procedures were approved by the Brazilian Ethics Committee. Body weight (BW) and food intake were recorded daily...
April 25, 2017: International Journal of Experimental Pathology
https://www.readbyqxmd.com/read/28443084/gene-expression-profiling-of-transcription-factors-of-helicobacter-pylori-under-different-environmental-conditions
#3
Miguel A De la Cruz, Miguel A Ares, Kristine von Bargen, Leonardo G Panunzi, Jessica Martínez-Cruz, Hilda A Valdez-Salazar, César Jiménez-Galicia, Javier Torres
Helicobacter pylori is a Gram-negative bacterium that colonizes the human gastric mucosa and causes peptic ulcers and gastric carcinoma. H. pylori strain 26695 has a small genome (1.67 Mb), which codes for few known transcriptional regulators that control bacterial metabolism and virulence. We analyzed by qRT-PCR the expression of 16 transcriptional regulators in H. pylori 26695, including the three sigma factors under different environmental conditions. When bacteria were exposed to acidic pH, urea, nickel, or iron, the sigma factors were differentially expressed with a particularly strong induction of fliA...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28442581/sigma-receptor-effects-of-n-substituted-benztropine-analogs-implications-for-antagonism-of-cocaine-self-administration
#4
Takato Hiranita, Weimin C Hong, Theresa Kopajtic, Jonathan L Katz
Several N-substituted benztropine (BZT) analogs are atypical dopamine transport inhibitors as they have affinity for the dopamine transporter (DAT), but have minimal cocaine-like pharmacological effects and can block numerous effects of cocaine including its self-administration. Among these compounds, N-methyl (AHN1-055), N-allyl (AHN2-005), and N-butyl (JHW007) analogs of 3α-[bis(4'-fluorophenyl)methoxy]-tropane were more potent in antagonizing self-administration of cocaine and d-methamphetamine than in decreasing food-maintained responding...
April 25, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28440951/concluding-the-trilogy-the-interaction-of-2-2-dihydroxy-benzophenones-and-their-carbonyl-n-analogues-with-human-glutathione-transferase-m1-1-face-to-face-with-the-p1-1-and-a1-1-isoenzymes-involved-in-mdr
#5
Nikolaos D Georgakis, Dionisis A Karagiannopoulos, Trias N Thireou, Elias E Eliopoulos, Nikolaos E Labrou, Petros G Tsoungas, Michael N Koutsilieris, Yannis D Clonis
The conjugation of intracellular glutathione (GSH) with several electrophilic, predominantly hydrophobic, endogenous and xenobiotic compounds, such as chemotherapeutics and carcinogenics, agrochemicals and other drugs, is catalyzed by the multigene enzyme family of glutathione transferases (GSTs). The mammalian family of GSTs comprises three groups: cytosolic, mitochondrial and microsomal. Human cytosolic GSTs constitute the largest family, which is classified in seven distinct classes named Alpha (Α), Mu (M), Pi (P), Theta (T), Sigma (S), Zeta (Z) and Omega (O)...
April 25, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/28435841/evading-plant-immunity-feedback-control-of-the-t3ss-in-pseudomonas-syringae
#6
COMMENT
Christopher Waite, Jörg Schumacher, Milija Jovanovic, Mark Bennett, Martin Buck
Microbes are responsible for over 10% of the global yield losses in staple crops such as wheat, rice, and maize. Understanding the decision-making strategies that enable bacterial plant pathogens to evade the host immune system and cause disease is essential for managing their ever growing threat to food security. Many utilise the needle-like type III secretion system (T3SS) to suppress plant immunity, by injecting effector proteins that inhibit eukaryotic signalling pathways into the host cell cytoplasm. Plants can in turn evolve resistance to specific pathogens via recognition and blocking of the T3SS effectors, so leading to an ongoing co-evolutionary 'arms race' between pathogen and host pairs...
March 17, 2017: Microbial Cell
https://www.readbyqxmd.com/read/28435536/norbenzomorphan-scaffold-chemical-tool-for-modulating-sigma-receptor-subtype-selectivity
#7
James J Sahn, Timothy R Hodges, Jessica Z Chan, Stephen F Martin
Some norbenzomorphans exhibit high affinity for sigma 1 and sigma 2 receptors, and varying the position of substituents on the aromatic ring of this scaffold has a significant effect on subtype selectivity. In particular, compounds bearing several different substituents at C7 of the norbenzomorphan ring system exhibit a general preference for the sigma 1 receptor, whereas the corresponding C8-substituted analogues preferentially bind at the sigma 2 receptor. These findings suggest that the norbenzomorphan scaffold may be a unique chemical template that can be easily tuned to prepare small molecules for use as tool compounds to study the specific biological effects arising from preferential binding at either sigma receptor subtype...
April 13, 2017: ACS Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28432957/nanoencapsulation-strategies-for-the-delivery-of-novel-bifunctional-antioxidant-%C3%AF-1-selective-ligands
#8
Claudia Carbone, Emanuela Arena, Veronica Pepe, Orazio Prezzavento, Ivana Cacciatore, Hasan Turkez, Agostino Marrazzo, Antonio Di Stefano, Giovanni Puglisi
Nowadays sigma-1 receptors are considered as new therapeutic objectives for central nervous system neurodegenerative diseases. Among different molecules, alpha lipoic acid has been identified as a natural potent antioxidant drug, whose therapeutic efficacy is limited by its many drawbacks, such as fast metabolism, poor bioavailability and high physico-chemical instability. Alfa-lipoic acid derivatives have been recently developed demonstrating their neuroprotective activity and effectiveness in different types of oxidative stress...
April 12, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28432844/evaluating-new-hba1c-methods-for-adoption-by-the-ifcc-and-ngsp-reference-networks-using-international-quality-targets
#9
Erna Lenters-Westra, Emma English
BACKGROUND: As a reference laboratory for HbA1c, it is essential to have accurate and precise HbA1c methods covering a range of measurement principles. We report an evaluation of the Abbott Enzymatic (Architect c4000), Roche Gen.3 HbA1c (Cobas c513) and Tosoh G11 using different quality targets. METHODS: The effect of hemoglobin variants, other potential interferences and the performance in comparison to both the International Federation of Clinical Chemistry and Laboratory Medicine (IFCC) and the National Glycohemoglobin Standardization Program (NGSP) reference systems was assessed using certified evaluation protocols...
April 22, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28432347/identification-and-characterization-of-differentially-regulated-type-ivb-pilin-genes-necessary-for-predation-in-obligate-bacterial-predators
#10
Ofir Avidan, Margarita Petrenko, René Becker, Sebastian Beck, Michael Linscheid, Shmuel Pietrokovski, Edouard Jurkevitch
Bdellovibrio bacteriovorus is an obligate predator of bacteria that grows and divides within the periplasm of its prey. Functions involved in the early steps of predation have been identified and characterized, but mediators of prey invasion are still poorly detailed. By combining omics data available for Bdellovibrio and like organisms (BALO's), we identified 43 genes expressed in B. bacteriovorus during the early interaction with prey. These included genes in a tight adherence (TAD) operon encoding for two type IVb fimbriae-like pilin proteins (flp1 and flp2), and their processing and export machinery...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28431607/sigma-1-receptor-in-brain-ischemia-reperfusion-possible-role-in-the-nr2a-induced-pathway-to-regulate-brain-derived-neurotrophic-factor
#11
Qian Xu, Xue-Fei Ji, Tian-Yan Chi, Peng Liu, Ge Jin, Ling Chen, Li-Bo Zou
Sigma-1 receptor (σ1r) activation could attenuate the learning and memory deficits in the AD model, ischemia model and others. In our previous study, the activation of σ1r increased the expression of brain-derived neurotrophic factor (BDNF), possibly through the NR2A-induced pathway, and σ1r agonists might function as neuroprotectant agents in vascular dementia. Here, we used σ1r knockout mice to confirm the role of σ1r. Furthermore, an antagonist of NR2A was first used to investigate whether the NR2A-induced pathway is the necessary link between σ1r and BDNF...
May 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28430099/mutual-interaction-enables-the-mycobacterial-plasmid-pal5000-origin-binding-protein-repb-to-recruit-repa-the-plasmid-replicase-to-the-origin
#12
Soniya Chatterjee, Madhu Manti Patra, Sourabh Samaddar, Arnab Basu, Sujoy K Das Gupta
The Mycobacterium fortuitum plasmid, pAL5000, is the most-studied member of a family of plasmids that are found in Actinobacteria. Its replication is brought about by the combined action of two plasmid-encoded replication proteins, RepA and RepB. RepB has earlier been shown to be a sigma factor homologue that possesses origin-binding activity. The mechanism by which RepA functions, and its relationship with RepB, if any, has not been explored yet. In this study, we show that RepA shares a common catalytic domain, with proteins belonging to the primase-polymerase and DNA polymerase X families...
April 22, 2017: Microbiology
https://www.readbyqxmd.com/read/28430083/hydrocephalus-treatment-in-children-long-term-outcome-in-975-consecutive-patients
#13
Pierre-Aurelien Beuriat, Stephanie Puget, Giuseppe Cinalli, Thomas Blauwblomme, Kevin Beccaria, Michel Zerah, Christian Sainte-Rose
OBJECTIVE Hydrocephalus remains one of the more common pathologies managed in pediatric neurosurgical units. Endoscopic third ventriculostomy (ETV) has an advantage over ventriculoperitoneal shunting as it enables patients to remain device free. Multiple shunt devices with various valve designs exist, with no one valve proven to be superior to another. The aim of this study was to describe the management of hydrocephalus and its long-term outcome. METHODS The authors retrospectively reviewed the medical records of all patients who had been treated for hydrocephalus at the Hôpital Necker-Enfants Malades in the period from 1985 to 1995...
April 21, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28422381/comparison-of-multi-institutional-varian-probeam-pencil-beam-scanning-proton-beam-commissioning-data
#14
Ulrich W Langner, John G Eley, Lei Dong, Katja Langen
PURPOSE: Commissioning beam data for proton spot scanning beams are compared for the first two Varian ProBeam sites in the United States, at the Maryland Proton Treatment Center (MPTC) and Scripps Proton Therapy Center (SPTC). In addition, the extent to which beams can be matched between gantry rooms at MPTC is investigated. METHOD: Beam data for the two sites were acquired with independent dosimetry systems and compared. Integrated depth dose curves (IDDs) were acquired with Bragg peak ion chambers in a 3D water tank for pencil beams at both sites...
April 19, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28422068/a-low-cost-bluetooth-low-energy-transceiver-for-wireless-sensor-network-applications-with-a-front-end-receiver-matching-network-reusing-power-amplifier-load-inductor
#15
Zhen Liang, Bin Li, Mo Huang, Yanqi Zheng, Hui Ye, Ken Xu, Fangming Deng
In this work, a low cost Bluetooth Low Energy (BLE) transceiver for wireless sensor network (WSN) applications, with a receiver (RX)-matching network-reusing power amplifier (PA) load inductor, is presented. In order to decrease the die area, only two inductors were used in this work. Besides the one used in the voltage control oscillator (VCO), the PA load inductor was reused as the RX impedance matching component in the front-end. Proper controls have been applied to achieve high transmitter (TX) input impedance when the transceiver is in the receiving mode, and vice versa...
April 19, 2017: Sensors
https://www.readbyqxmd.com/read/28421439/sigma-1-receptor-antagonist-haloperidol-attenuates-ca-2-responses-induced-by-glutoxim-and-molixan-in-macrophages
#16
Z I Krutetskaya, L S Milenina, A A Naumova, S N Butov, V G Antonov, A D Nozdrachev
Using Fura-2AM microfluorimetry, we have shown for the first time that sigma-1 receptor antagonist, antipsychotic haloperidol, significantly inhibits glutoxim- and molixan-induced Ca(2+)-response in peritoneal macrophages. These results indicate possible involvement of sigma-1 receptors in the signal cascade induced by glutoxim or molixan and leading to intracellular Ca(2+) concentration increase in macrophages.
January 2017: Doklady. Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28421225/using-telephony-data-to-facilitate-discovery-of-clinical-workflows
#17
Donald W Rucker
BACKGROUND:  Discovery of clinical workflows to target for redesign using methods such as Lean and Six Sigma is difficult. VoIP telephone call pattern analysis may complement direct observation and EMR-based tools in understanding clinical workflows at the enterprise level by allowing visualization of institutional telecommunications activity. OBJECTIVE:  To build an analytic framework mapping repetitive and high-volume telephone call patterns in a large medical center to their associated clinical units using an enterprise unified communications server log file and to support visualization of specific call patterns using graphical networks...
April 19, 2017: Applied Clinical Informatics
https://www.readbyqxmd.com/read/28421194/dihydromyricetin-protects-against-diabetic-cardiomyopathy-in-streptozotocin-induced-diabetic-mice
#18
Bin Wu, Jie Lin, Jian Luo, Dong Han, Miaomiao Fan, Tao Guo, Ling Tao, Ming Yuan, Fu Yi
Diabetic cardiomyopathy (DCM) is an important cause of heart failure in diabetic patients. The present study sought to explore the potential effects of dihydromyricetin (DHM) on DCM and its possible mechanism. A diabetic model was induced by intraperitoneal injection of streptozotocin (STZ) in C57BL/6J mice. Two weeks after the STZ injection, mice were randomly allocated into the following 4 groups for treatment: the control group (CON), the control treated with DHM group (CON + DHM), the diabetes group (DM), and the diabetes treated with DHM group (DM + DHM)...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28421011/practical-consequences-of-item-response-theory-model-misfit-in-the-context-of-test-equating-with-mixed-format-test-data
#19
Yue Zhao, Ronald K Hambleton
In item response theory (IRT) models, assessing model-data fit is an essential step in IRT calibration. While no general agreement has ever been reached on the best methods or approaches to use for detecting misfit, perhaps the more important comment based upon the research findings is that rarely does the research evaluate IRT misfit by focusing on the practical consequences of misfit. The study investigated the practical consequences of IRT model misfit in examining the equating performance and the classification of examinees into performance categories in a simulation study that mimics a typical large-scale statewide assessment program with mixed-format test data...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28419759/regulation-of-burkholderia%C3%A2-cenocepacia-biofilm-formation-by-rpon-and-the-c-di-gmp-effector-berb
#20
Mustafa Fazli, Morten Rybtke, Elisabeth Steiner, Elisabeth Weidel, Jens Berthelsen, Julie Groizeleau, Wu Bin, Boo Zhao Zhi, Zhang Yaming, Volkhard Kaever, Michael Givskov, Rolf W Hartmann, Leo Eberl, Tim Tolker-Nielsen
Knowledge about the molecular mechanisms that are involved in the regulation of biofilm formation is essential for the development of biofilm-control measures. It is well established that the nucleotide second messenger cyclic diguanosine monophosphate (c-di-GMP) is a positive regulator of biofilm formation in many bacteria, but more knowledge about c-di-GMP effectors is needed. We provide evidence that c-di-GMP, the alternative sigma factor RpoN (σ54), and the enhancer-binding protein BerB play a role in biofilm formation of Burkholderia cenocepacia by regulating the production of a biofilm-stabilizing exopolysaccharide...
April 16, 2017: MicrobiologyOpen
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