keyword
MENU ▼
Read by QxMD icon Read
search

running mechanics

keyword
https://www.readbyqxmd.com/read/29786779/dnmt3a-controls-mir-200b-in-cardiac-fibroblast-autophagy-and-cardiac-fibrosis
#1
Xu-Dong Zhao, Run-He Qin, Jing-Jing Yang, Sheng-Song Xu, Hui Tao, Xuan-Sheng Ding, Kai-Hu Shi
AIM AND OBJECTIVE: Regulation of microRNA gene expression by DNA methylation may represent a key mechanism to drive cardiac fibrosis progression. Cardiac fibroblast autophagy is the primary source of cardiac fibrosis, but the mechanisms underlying this process are incompletely understood. Here we found that DNMT3A suppression of the microRNA-200b (miR-200b) through pathway leads to cardiac fibroblast autophagy in cardiac fibrosis. METHODS: To understand the impact of DNMT3A on miR-200b at cardiac fibrosis, the rat cardiac fibrosis model was established via the abdominal aortic coarctation...
May 21, 2018: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
https://www.readbyqxmd.com/read/29785626/sex-attractant-pheromones-of-virgin-queens-of-sympatric-slave-making-ant-species-in-the-genus-polyergus-and-their-possible-roles-in-reproductive-isolation
#2
Les Greenberg, Christine A Johnson, James C Trager, J Steven McElfresh, Joshua Rodstein, Jocelyn G Millar
Species of the ant genus Polyergus are social parasites that steal brood from colonies of their hosts in the closely related genus Formica. Upon emergence as adults in a mixed population, host Formica workers carry out all the normal worker functions within the Polyergus colony, including foraging, feeding, grooming, and rearing brood of the parasitic Polyergus ants. Some unmated Polyergus gynes (queens) run in the raiding columns of their colonies and attract males by releasing a pheromone from their mandibular glands...
May 22, 2018: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/29781233/fit-guts-reduced-models-online-from-theory-to-practice
#3
Virgile Baudrot, Philippe Veber, Guillaume Gence, Sandrine Charles
Mechanistic modelling approaches, as the toxicokinetic-toxicodynamic (TKTD) framework, are promoted by international institutions as EFSA and OECD to assess the environmental risk of chemical products generated by human activities. TKTD models can encompass a large set of mechanisms describing the kinetics of compounds inside organisms (e.g. uptake and elimination) and their effect at the level of individuals (e.g. damage accrual, recovery and death mechanism). Compared to classical dose-response models, TKTD approaches have many advantages as taking into account temporal aspects of exposure and toxicity, considering data-points all along the experiment and not only at the end, and making predictions for untested situations as realistic exposure scenarios...
May 20, 2018: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/29780670/unfolding-of-%C3%AE-helical-20-residue-poly-glutamic-acid-analyzed-by-multiple-runs-of-canonical-molecular-dynamics-simulations
#4
Naoki Ogasawara, Kota Kasahara, Ryosuke Iwai, Takuya Takahashi
Elucidating the molecular mechanism of helix-coil transitions of short peptides is a long-standing conundrum in physical chemistry. Although the helix-coil transitions of poly-glutamic acid (PGA) have been extensively studied, the molecular details of its unfolding process still remain unclear. We performed all-atom canonical molecular dynamics simulations for a 20-residue PGA, over a total of 19 μs, in order to investigate its helix-unfolding processes in atomic resolution. Among the 28 simulations, starting with the α-helical conformation, all showed an unfolding process triggered by the unwinding of terminal residues, rather than by kinking and unwinding of the middle region of the chain...
2018: PeerJ
https://www.readbyqxmd.com/read/29779376/photoinduced-localized-hole-delays-nonradiative-electron-hole-recombination-in-cesium-lead-halide-perovskites-a-time-domain-ab-initio-analysis
#5
Jinlu He, Meng Guo, Run Long
All-inorganic perovskites have attracted intense interest as promising photovoltaic materials due to their excellent performance. Using time domain density functional theory combined with nonadiabatic (NA) molecular dynamics, we demonstrate that a photoinduced localized polaron-like hole greatly delays the nonradiative electron-hole recombination relative to the structure with delocalized free charge of the CsPbBr3 . This is because localized charge carriers diminish overlap between electron and hole wave functions and decrease the NA coupling by a factor of 6...
May 22, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29776559/angioedema-in-heart-failure-patients-treated-with-sacubitril-valsartan-lcz696-or-enalapril-in-the-paradigm-hf-study
#6
Victor Shi, Michele Senni, Hendrik Streefkerk, Vikas Modgill, Wenchun Zhou, Allen Kaplan
BACKGROUND: PARADIGM-HF demonstrated significant clinical benefits for sacubitril/valsartan (LCZ696, an angiotensin receptor neprilysin inhibitor) versus the angiotensin-converting enzyme inhibitor (ACEI) enalapril in patients with heart failure with reduced ejection fraction. As inhibition of ACE, and co-inhibition of ACE and neprilysin, may increase the risk of angioedema, this was an adverse event of special interest. METHODS: Following sequential enalapril and sacubitril/valsartan run-ins, patients were randomized to twice-daily sacubitril/valsartan 200 mg or enalapril 10 mg...
August 1, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29776183/slowdown-of-surface-diffusion-during-early-stages-of-bacterial-colonization
#7
T Vourc'h, H Peerhossaini, J Léopoldès, A Méjean, F Chauvat, C Cassier-Chauvat
We study the surface diffusion of the model cyanobacterium Synechocystis sp. PCC6803 during the incipient stages of cell contact with a glass surface in the dilute regime. We observe a twitching motility with alternating immobile tumble and mobile run periods, resulting in a normal diffusion described by a continuous-time random walk with a coefficient of diffusion D. Surprisingly, D is found to decrease with time down to a plateau. This is observed only when the cyanobacterial cells are able to produce released extracellular polysaccharides, as shown by a comparative study between the wild-type strain and various polysaccharides-depleted mutants...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29776055/optimal-methylation-noise-for-best-chemotactic-performance-of-e-coli
#8
Subrata Dev, Sakuntala Chatterjee
In response to a concentration gradient of chemoattractant, E. coli bacterium modulates the rotational bias of flagellar motors which control its run-and-tumble motion, to migrate towards regions of high chemoattractant concentration. Presence of stochastic noise in the biochemical pathway of the cell has important consequences on the switching mechanism of motor bias, which in turn affects the runs and tumbles of the cell in a significant way. We model the intracellular reaction network in terms of coupled time evolution of three stochastic variables-kinase activity, methylation level, and CheY-P protein level-and study the effect of methylation noise on the chemotactic performance of the cell...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29776014/association-of-objectively-measured-physical-activity-with-brain-structure-uk-biobank-study
#9
Mark Hamer, Nikhil Sharma, G David Batty
BACKGROUND: Physical activity may be beneficial for cognition but mechanisms are unclear. We examined the association between objectively assessed physical activity and brain volume, with a focus on the hippocampus region. METHODS: We used data from UK Biobank (n=5,272; aged 55.4±7.5 yrs; 45.6% men) collected through 2013-2016. Participants wore the Axivity AX3 wrist-worn triaxial accelerometer for seven days to assess habitual physical activity. Structural magnetic resonance imaging was performed using a standard Siemens Skyra 3T running VD13A SP4 to obtain images of the brain...
May 18, 2018: Journal of Internal Medicine
https://www.readbyqxmd.com/read/29775286/multiple-architectures-and-mechanisms-of-latency-in-metallopeptidase-zymogens
#10
Joan L Arolas, Theodoros Goulas, Anna Cuppari, F Xavier Gomis-Rüth
Metallopeptidases cleave polypeptides bound in the active-site cleft of catalytic domains through a general base/acid mechanism. This involves a solvent molecule bound to a catalytic zinc and general regulation of the mechanism through zymogen-based latency. Sixty reported structures from 11 metallopeptidase families reveal that prosegments, mostly N-terminal of the catalytic domain, block the cleft regardless of their size. Prosegments may be peptides (5-14 residues), which are only structured within the zymogens, or large moieties (<227 residues) of one or two folded domains...
May 18, 2018: Chemical Reviews
https://www.readbyqxmd.com/read/29774549/extracorporeal-membrane-oxygenation-characteristics-and-outcomes-in-adult-patients-with-down-syndrome
#11
Vicky Duffy, Daniel Gomez, Peter Rycus, Brian Rivera, Stephanie L Santoro, Carl H Backes, Clifford L Cua
Patients with Down syndrome (DS) may have multiple medical issues that place them at risk for requiring extracorporeal membrane oxygenation. Use of extracorporeal membrane oxygenation in pediatric patients with Down syndrome has been described, but minimal data exist for extracorporeal membrane oxygenation use in adults with Down syndrome. The goal of this study was to describe the clinical characteristics and to determine if there were differences between adult extracorporeal membrane oxygenation patients with Down syndrome that were alive (aDS) versus those that died (dDS) prior to hospital discharge...
May 17, 2018: Artificial Organs
https://www.readbyqxmd.com/read/29769830/low-external-workloads-are-related-to-higher-injury-risk-in-professional-male-basketball-games
#12
Toni Caparrós, Martí Casals, Álvaro Solana, Javier Peña
The primary purpose of this study was to identify potential risk factors for sports injuries in professional basketball. An observational retrospective cohort study involving a male professional basketball team, using game tracking data was conducted during three consecutive seasons. Thirty-three professional basketball players took part in this study. A total of 29 time-loss injuries were recorded during regular season games, accounting for 244 total missed games with a mean of 16.26 ± 15.21 per player and season...
June 2018: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29769640/hypoxia-induced-microrna-191-contributes-to-hepatic-ischemia-reperfusion-injury-through-the-zonab-cyclin-d1-axis
#13
Wenming Pan, Lin Wang, Xiao-Fei Zhang, Hongji Zhang, Jinxiang Zhang, Guoliang Wang, Peng Xu, Yunwei Zhang, Ping Hu, Xiao-Dong Zhang, Run-Lei Du, Hui Wang
Hepatic ischemia/reperfusion injury (IRI) is a common cause of morbidity and mortality in liver transplantation settings and involves severe cell death and inflammatory responses. MicroRNA-191 has recently been reported to be abnormally expressed in hepatocellular carcinoma and other liver diseases in the regulation of important cellular processes. However, little is known about its function and molecular mechanism in IRI. Here, we demonstrate that miR-191 is significantly upregulated in a cultured cell line during hypoxia/reperfusion (H/R) and in liver tissue during IRI in mice...
May 16, 2018: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29769416/endogenous-systems-involved-in-exercise-induced-analgesia
#14
R Da Silva Santos, G Galdino
Exercise-induced analgesia is a phenomenon discussed worldwide. This effect began to be investigated in the early 1970s in healthy individuals and rodents during and after an acute or chronic session of running or swimming. Thereafter, studies found this effect was also induced by resistance exercises. Over the years, many studies have demonstrated the importance of exercise-induced analgesia in relieving pain caused by different conditions, such as fibromyalgia, low back pain, neuropathy, and osteoarthritis...
February 2018: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/29769408/cell-geometry-across-the-ring-structure-of-sitka-spruce
#15
T P S Reynolds, H C Burridge, R Johnston, G Wu, D U Shah, O A Scherman, P F Linden, M H Ramage
For wood to be used to its full potential as an engineering material, it is necessary to quantify links between its cell geometry and the properties it exhibits at bulk scale. Doing so will make it possible to predict timber properties crucial to engineering, such as mechanical strength and stiffness, and the resistance to fluid flow, and to inform strategies to improve those properties as required, as well as to measure the effects of interventions such as genetic manipulation and chemical modification. Strength, stiffness and permeability of timber all derive from the geometry of its cells, and yet current practice is to predict them based on properties, such as bulk density, that do not directly describe the cell structure...
May 2018: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/29768981/a-scalable-pipeline-for-high-throughput-flow-cytometry
#16
Aaron C Wilson, Ioannis K Moutsatsos, Gary Yu, Javier J Pineda, Yan Feng, Douglas S Auld
Flow cytometry (FC) provides high-content data for a variety of applications, including phenotypic analysis of cell surface and intracellular markers, characterization of cell supernatant or lysates, and gene expression analysis. Historically, sample preparation, acquisition, and analysis have presented as a bottleneck for running such types of assays at scale. This article will outline the solutions that have been implemented at Novartis which have allowed high-throughput FC to be successfully conducted and analyzed for a variety of cell-based assays...
May 1, 2018: SLAS Discovery
https://www.readbyqxmd.com/read/29768915/relative-ligand-binding-free-energies-calculated-from-multiple-short-qm-mm-md-simulations
#17
Casper Steinmann, Martin A Olsson, Ulf Ryde
We have devised a new efficient approach to compute combined quantum mechanical (QM) and molecular mechanical (MM, i.e. QM/MM) ligand-binding relative free energies. Our method employs the reference-potential approach with free-energy perturbation both at the MM level (between the two ligands) and from MM to QM/MM (for each ligand). To ensure that converged results are obtained for the MM→QM/MM perturbations, explicit QM/MM molecular dynamics (MD) simulations are performed with two intermediate mixed states...
May 17, 2018: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/29766619/universal-infant-health-interventions-and-young-adult-outcomes
#18
Miriam Wüst, Erik Lykke Mortensen, Merete Osler, Thorkild I A Sørensen
Three recent studies have documented short- and long-run benefits of early-infancy health interventions in Norway, Sweden, and Denmark: Universal nurse home visiting (NHV) and well-baby center care decreased infant mortality and positively impacted long-run survival (DK, S), morbidity (DK, N), and educational and labor market outcomes (N). Using Danish conscription data, this paper examines intermediate outcomes to assess both potential mechanisms and the importance of selective survival for the long-run health effects of NHV...
May 16, 2018: Health Economics
https://www.readbyqxmd.com/read/29765683/preparation-of-cu-zsm-5-catalysts-by-chemical-vapour-deposition-for-catalytic-wet-peroxide-oxidation-of-phenol-in-a-fixed-bed-reactor
#19
Donglin He, Huiping Zhang, Ying Yan
Cu-ZSM-5 catalysts were prepared by chemical vapour deposition for catalytic wet peroxide oxidation (CWPO) of phenol in a fixed bed reactor. Firstly, Cu-ZSM-5 catalysts with Cu loading of 0.5, 2, and 6 wt% were prepared and characterized by X-ray diffraction (XRD), N2 adsorption-desorption and X-ray photoelectron spectra (XPS). The characterization results demonstrated that CuO was uniformly dispersed on ZSM-5 with slight effect on the structure properties of the support. Then, several variables, such as the copper loading, reaction temperature, catalyst bed height and feed flow rate were investigated in the CWPO of phenol in aqueous solution at high concentration (1000 ppm)...
April 2018: Royal Society Open Science
https://www.readbyqxmd.com/read/29764366/phylogenetic-signal-from-rearrangements-in-18-anopheles-species-by-joint-scaffolding-extant-and-ancestral-genomes
#20
Yoann Anselmetti, Wandrille Duchemin, Eric Tannier, Cedric Chauve, Sèverine Bérard
BACKGROUND: Genomes rearrangements carry valuable information for phylogenetic inference or the elucidation of molecular mechanisms of adaptation. However, the detection of genome rearrangements is often hampered by current deficiencies in data and methods: Genomes obtained from short sequence reads have generally very fragmented assemblies, and comparing multiple gene orders generally leads to computationally intractable algorithmic questions. RESULTS: We present a computational method, ADSEQ, which, by combining ancestral gene order reconstruction, comparative scaffolding and de novo scaffolding methods, overcomes these two caveats...
May 9, 2018: BMC Genomics
keyword
keyword
66860
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"