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https://www.readbyqxmd.com/read/29168245/homology-based-hydrogen-bond-information-improves-crystallographic-structures-in-the-pdb
#1
Bart van Beusekom, Wouter G Touw, Mahidhar Tatineni, Sandeep Somani, Gunaretnam Rajagopal, Jinquan Luo, Gary L Gilliland, Anastassis Perrakis, Robbie P Joosten
The Protein Data Bank (PDB) is the global archive for structural information on macromolecules, and a popular resource for researchers, teachers and students, amassing more than one million unique users each year. Crystallographic structure models in the PDB (more than 100,000 entries) are optimized against the crystal diffraction data and geometrical restraints. This process of crystallographic refinement typically ignored hydrogen bond (H-bond) distances as a source of information. However, H-bond restraints can improve structures at low resolution where diffraction data are limited...
November 23, 2017: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/29166711/-effects-of-caspase-1-inhibitor-vx765-on-cold-restraint-stress-induced-acute-gastric-ulcer-in-mice
#2
S Q Zheng, X D Hong, T S Chen, P F Luo, S C Xiao
Objective: To investigate the protective effects of caspase-1 inhibitor VX765 on gastric mucosa of mice with cold-restraint stress-induced acute gastric ulcer. Methods: Twenty-four specific pathogen free male C57BL/6J mice were divided into normal control group (NC), cold restrain group (CR), VX765 pre-treatment+ cold restrain group (VCR), and rabeprazole pre-treatment+ cold restrain group (RCR) according to the random number table, with 6 mice in each group. Mice in group NC were injected intraperitoneally with solution of 10 mL/kg dimethylsulfoxide (DMSO) and phosphate buffer solution (PBS)...
November 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/29166572/territorial-aggression-in-urban-and-rural-song-sparrows-is-correlated-with-corticosterone-but-not-testosterone
#3
Scott Davies, Michelle L Beck, Kendra B Sewall
Urban songbirds of several species more vigorously defend their territories in response to conspecific song playback than do their rural counterparts, but the hormonal basis of this behavioral difference is unclear. It is well established in vertebrates that both testosterone and corticosterone affect the intensity of territoriality. Previous studies have found no evidence that initial (i.e., immediately follow territorial challenge, but prior to restraint) plasma testosterone accounts for the elevated territorial aggression of urban birds...
November 19, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29165002/adrenal-dependent-and-independent-stress-induced-per1-mrna-in-hypothalamic-paraventricular-nucleus-and-prefrontal-cortex-of-male-and-female-rats
#4
Lauren E Chun, Jenny Christensen, Elizabeth R Woodruff, Sarah J Morton, Laura R Hinds, Robert L Spencer
Oscillating clock gene expression gives rise to a molecular clock that is present not only in the body's master circadian pacemaker, the hypothalamic suprachiasmatic nucleus (SCN), but also in extra-SCN brain regions. These extra-SCN molecular clocks depend on the SCN for entrainment to a light:dark cycle. The SCN has limited neural efferents, so it may entrain extra-SCN molecular clocks through its well-established circadian control of glucocorticoid hormone secretion. Glucocorticoids can regulate the normal rhythmic expression of clock genes in some extra-SCN tissues...
November 22, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/29163921/the-short-device-lifetimes-of-blue-pholeds-insights-into-the-photostability-of-blue-ir-iii-complexes
#5
Denis Jacquemin, Daniel Escudero
Using Ir(iii) complexes as dopants in phosphorescent organic light-emitting diodes (PhOLEDs) is the most successful strategy to attain long-lasting and highly-performant electroluminescent devices. Whilst highly efficient blue PhOLEDs are accessible, their limited operational lifetimes still restraint their practical use in lighting and displays. These short lifetimes are directly related to the low intrinsic photostability of blue Ir(iii) complexes. This work uses first principles to unveil the mechanisms of degradation of blue phosphors arising from energetically hot excited states (≅6...
November 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/29163199/slow-breathing-can-be-operantly-conditioned-in-the-rat-and-may-reduce-sensitivity-to-experimental-stressors
#6
Donald J Noble, William N Goolsby, Sandra M Garraway, Karmarcha K Martin, Shawn Hochman
In humans, exercises involving slowed respiratory rate (SRR) counter autonomic sympathetic bias and reduce responses to stressors, including in individuals with various degrees of autonomic dysfunction. In the rat, we examined whether operant conditioning could lead to reductions in respiratory rate (RR) and performed preliminary studies to assess whether conditioned SRR was sufficient to decrease physiological and behavioral responsiveness to stressors. RR was continuously monitored during 20 2-h sessions using whole body plethysmography...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29162289/apelin-apj-system-is-responsible-for-stress-induced-increase-in-atrial-natriuretic-peptide-expression-in-rat-heart
#7
Vecihe Nimet Izgut-Uysal, Nuray Acar, Ilknur Birsen, Filiz Ozcan, Ozlem Ozbey, Hakan Soylu, Sema Avci, Filiz Tepekoy, Gokhan Akkoyunlu, Gultekin Yucel, Ismail Ustunel
BACKGROUND: The cardiovascular system is a primary target of stress and stress is the most important etiologic factor in cardiovascular diseases. Stressors increase expressions of atrial natriuretic peptide (ANP) and apelin in cardiac tissue. AIM: The aim of the present study was to investigate whether stress-induced apelin has an effect on the expression of ANP in the right atrium of rat heart. METHODS: The rats were divided into the control, stress and F13A+stress groups...
October 31, 2017: Tissue & Cell
https://www.readbyqxmd.com/read/29159837/protein-structure-modeling-and-refinement-by-global-optimization-in-casp12
#8
Seung Hwan Hong, InSuk Joung, Jose C Flores-Canales, Balachandran Manavalan, Qianyi Cheng, Seungryong Heo, Jong Yun Kim, Sun Young Lee, Mikyung Nam, Keehyoung Joo, In-Ho Lee, Sung Jong Lee, Jooyoung Lee
For protein structure modeling in the CASP12 experiment, we have developed a new protocol based on our previous CASP11 approach. The global optimization method of conformational space annealing (CSA) was applied to three stages of modeling: multiple sequence-structure alignment, three-dimensional (3D) chain building, and side-chain re-modeling. For better template selection and model selection, we updated our model quality assessment (QA) method with the newly developed SVMQA (support vector machine for quality assessment)...
November 21, 2017: Proteins
https://www.readbyqxmd.com/read/29155324/angiotensin-receptor-blocker-irbesartan-reduces-stress-induced-intestinal-inflammation-via-at1a-signaling-and-ace2-dependent-mechanism-in-mice
#9
Maimaiti Yisireyili, Yasuhiro Uchida, Koji Yamamoto, Takayuki Nakayama, Xian Wu Cheng, Tadashi Matsushita, Shigeo Nakamura, Toyoaki Murohara, Kyosuke Takeshita
Stress is associated with pathophysiology of both irritable bowel syndrome (IBS) and hypertension. Angiotensin receptor blockers (ARB) have anti-inflammatory properties via inhibition of angiotensin II (Ang II)/Ang II type I receptor axis (AT1). Inhibition of the classical RAS pathway is also involved in upregulation of angiotensin converting enzyme-2 (ACE2), which activates the Ang-(1-7) /Mas pathway to counteract inflammatory signaling and acts as a partner of the amino acid transporter, B(0)AT-1, to absorb tryptophan for regulation of microbiota-gut-brain axis...
November 16, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29155045/independent-and-interactive-associations-of-negative-affect-restraint-and-impulsivity-in-relation-to-binge-eating-among-women
#10
Tyler B Mason, Kathryn E Smith, Jason M Lavender, Robin J Lewis
There is growing recognition that impulsivity may serve as an underlying risk factor for binge eating. In addition, the association of impulsivity with binge eating may be moderated by other affective and cognitive risk factors. This study examined independent and interactive associations of negative affect, dietary restraint, and facets of impulsivity with binge eating. A diverse sample of 566 undergraduate women completed online questionnaires of study variables. Results revealed a three-way interaction of negative affect, dietary restraint, and attentional impulsivity in relation to binge eating...
November 16, 2017: Appetite
https://www.readbyqxmd.com/read/29152813/replication-of-a-modified-factor-structure-for-the-eating-disorder-examination-questionnaire-extension-to-clinical-eating-disorder-and-non-clinical-samples-in-portugal
#11
Paulo P P Machado, Carlos M Grilo, Ross D Crosby
Psychometric investigations of the Eating Disorder Examination-Questionnaire (EDE-Q) have generally not supported the original scale structure. The present study tested an alternative brief factor structure in two large Portuguese samples: (1) a non-clinical sample of N = 4117 female students and (2) a treatment-seeking sample of N = 609 patients diagnosed with eating disorders. Confirmatory factor analysis revealed a poor fit for the original EDE-Q structure in both the non-clinical and the clinical samples but revealed a good fit for the alternative 7-item 3-factor structure (dietary restraint, shape/weight overvaluation and body dissatisfaction)...
November 20, 2017: European Eating Disorders Review: the Journal of the Eating Disorders Association
https://www.readbyqxmd.com/read/29151095/violent-behavior
#12
Sophia Sopromadze, Alexander Tsiskaridze
Violence is a significant public health problem representing one of the leading causes of death worldwide for people aged 15-44 years. Although violence and aggression are more frequent in adolescence and early adult life and decline with advancing age, these conditions can still develop for the first time in old age especially in association with organic brain disorder. Rates of violent death vary according to country income levels and are twice as higher in low- to middle-income countries than in high-income countries...
2018: Frontiers of Neurology and Neuroscience
https://www.readbyqxmd.com/read/29151061/evolution-of-sanitary-epidemiological-services-in-poland-in-the-years-1944-2014
#13
Marek L Grabowski, Bożena Kosińska, Józef P Knap
This paper presents the history of sanitary-epidemiological services in the context of the health, economic and socio-political situation in Poland in the years 1944-2014, with a critical analysis of legal restraints, efficiency and achievements. Polish Sanitary Services, established in 1919, as a state service, have preserved for more than 95 years (also during World War II and the occupation) the continuity of its structures and essential objectives to enable their implementation in the field of public health protection...
November 8, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/29148838/discordance-between-age-and-size-based-criteria-of-child-passenger-restraint-appropriateness
#14
Mary L Smiley, C Raymond Bingham, Peter D Jacobson, Michelle L Macy
Objectives In this study we sought to accomplish the following objectives: 1) to calculate the percentage of children considered appropriately restrained across eight criteria of increasing restrictiveness; 2) to examine agreement between age- and size-based appropriateness criteria; 3) to assess for changes in the percentage of children considered appropriately restrained by the eight criteria between 2011 (shortly after updates to United States (U.S.) guidelines) and 2015. Methods Data from two cross-sectional surveys of 928 parents of children younger than 12 years old (n = 591 in 2011, n = 337 in 2015) were analyzed in 2017...
November 17, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/29148785/rapid-quantitative-measurements-of-paramagnetic-relaxation-enhancements-in-cu-ii-tagged-proteins-by-proton-detected-solid-state-nmr-spectroscopy
#15
Dwaipayan Mukhopadhyay, Philippe S Nadaud, Matthew D Shannon, Christopher P Jaroniec
We demonstrate rapid quantitative measurements of site-resolved paramagnetic relaxation enhancements (PREs), which are a source of valuable structural restraints corresponding to electron-nucleus distances in the ~10-20 Å regime, in solid-state nuclear magnetic resonance (NMR) spectra of proteins containing covalent Cu(2+)-binding tags. Specifically, using protein GB1 K28C-EDTA-Cu(2+) mutant as a model, we show the determination of backbone amide (15)N longitudinal and (1)H transverse PREs within a few hours of experiment time based on proton-detected 2D or 3D correlation spectra recorded with magic-angle spinning frequencies ≥ ~60 kHz for samples containing ~10-50 nanomoles of (2)H,(13)C,(15)N-labeled protein back-exchanged in H2O...
November 17, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29143783/metformin-potentiates-the-benefits-of-dietary-restraint-a-metabolomic-study
#16
Marta Riera-Borrull, Anabel García-Heredia, Salvador Fernández-Arroyo, Anna Hernández-Aguilera, Noemí Cabré, Elisabet Cuyàs, Fedra Luciano-Mateo, Jordi Camps, Javier A Menendez, Jorge Joven
Prevention of the metabolic consequences of a chronic energy-dense/high-fat diet (HFD) represents a public health priority. Metformin is a strong candidate to be incorporated in alternative therapeutic approaches. We used a targeted metabolomic approach to assess changes related to the multi-faceted metabolic disturbances provoked by HFD. We evaluated the protective effects of metformin and explored how pro-inflammatory and metabolic changes respond when mice rendered obese, glucose-intolerant and hyperlipidemic were switched to diet reversal with or without metformin...
October 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29143765/relative-influence-of-socioeconomic-psychological-and-sensory-characteristics-physical-activity-and-diet-on-5-year-weight-gain-in-french-adults
#17
Aurélie Lampuré, Katia Castetbon, Mohamed Hanafi, Amélie Deglaire, Pascal Schlich, Sandrine Péneau, Serge Hercberg, Caroline Méjean
Individual characteristics, dietary intake and physical activity influence weight status; however, the contribution of each factor to weight change has not been studied. The objective was to confirm a conceptual framework by simultaneously assessing the relative influence of socioeconomic, psychological and sensory characteristics, physical activity, and dietary intake on five-year weight gain in French adults. Individual characteristics, physical activity, and dietary data were assessed at baseline in 8014 participants in the NutriNet-Santé cohort...
October 28, 2017: Nutrients
https://www.readbyqxmd.com/read/29140657/sunlight-and-other-disinfectants-disclosure-obligations-under-the-federal-securities-and-drug-regulatory-regimes
#18
Joseph G Milner
Drug development requires patience. Beyond the inherent uncertainty of the development process itself, U.S. drug developers must comply with the regulatory approval process overseen by the U.S. Food and Drug Administration (FDA). Because this process takes time, drug development also costs money. Drug companies seeking to raise funds in U.S. capital markets must navigate the securities regime governed by the Securities & Exchange Commission (SEC). Despite their similar roles as protectors of consumers and public markets, SEC and FDA send conflicting signals about the information drug companies need to disclose to the public...
2017: Food and Drug Law Journal
https://www.readbyqxmd.com/read/29139068/minor-corral-changes-and-adoption-of-good-handling-practices-can-improve-the-behavior-and-reduce-cortisol-release-in-nellore-cows
#19
Maria Lúcia Pereira Lima, João Alberto Negrão, Claudia Cristina Paro de Paz, Temple Grandin
Inadequate corral facilities and improper handling are major causes of stress in beef cattle. The purpose of this study was to evaluate the effects of minor changes in the corral and adoption of good handling practices on the behavior, cortisol release, and time spent taking blood samples in Nellore cows. Minor corral changes included obstructing the cow's vision when the handler walked deep into the animal's flight zone and the elimination of bright objects, color contrasts, puddles, shadows, and darkness in the corral...
November 14, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/29134679/prediction-of-protein-structure-with-the-coarse-grained-unres-force-field-assisted-by-small-x-ray-scattering-data-and-knowledge-based-information
#20
Agnieszka S Karczyńska, Magdalena A Mozolewska, Paweƚ Krupa, Artur Gieƚdoń, Adam Liwo, Cezary Czaplewski
A new approach to assisted protein-structure prediction has been proposed, which is based on running multiplexed replica exchange molecular dynamics simulations with the coarse-grained UNRES force field with restraints derived from knowledge-based models and distance distribution from small angle X-ray scattering (SAXS) measurements. The latter restraints are incorporated into the target function as a maximum-likelihood term that guides the shape of the simulated structures towards that defined by SAXS. The approach was first verified with the 1KOY protein, for which the distance distribution was calculated from the experimental structure, and subsequently used to predict the structures of 11 data-assisted targets in the CASP12 experiment...
November 14, 2017: Proteins
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