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https://www.readbyqxmd.com/read/28821664/differential-desensitization-observed-at-multiple-effectors-of-somatic-%C3%AE-opioid-receptors-underlies-sustained-agonist-mediated-inhibition-of-proopiomelanocortin-neuron-activity
#1
Philip D Fox, Shane T Hentges
Activation of somatic μ-opioid receptors (MORs) in hypothalamic proopiomelanocortin (POMC) neurons leads to the activation of G-protein-coupled inward rectifier potassium (GIRK) channels and hyperpolarization, but in response to continued signaling MORs undergo acute desensitization resulting in robust reduction in the peak GIRK current after minutes of agonist exposure. We hypothesized that the attenuation of the GIRK current would lead to a recovery of neuronal excitability whereby desensitization of the receptor would lead to a new steady state of POMC neuron activity reflecting the sustained GIRK current observed after the initial decline from peak with continued agonist exposure...
September 6, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28820248/modulating-wettability-of-layered-materials-by-controlling-ligand-polar-headgroup-dynamics
#2
Terry A Villarreal, Shane R Russell, Jae Jin Bang, Justin K Patterson, Shelley A Claridge
Integrating functionalized 2D materials into multilayer device architectures increasingly requires understanding the behavior of noncovalently adsorbed ligands during solution processing. Here, we demonstrate that the headgroup dynamics of polymerized monolayers of functional alkanes can be controlled to modify surface wetting and environmental interactions. We find that headgroup dynamics are sensitive to the position of the polymerizable diyne group; thus, the polymerization process, typically used to stabilize the noncovalent monolayer, can also be used to selectively destabilize chain-chain interactions near the headgroups, making the headgroups more solvent-accessible and increasing surface hydrophilicity...
August 18, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28794430/metallic-ferromagnetic-films-with-magnetic-damping-under-1-4%C3%A2-%C3%A3-%C3%A2-10-3
#3
Aidan J Lee, Jack T Brangham, Yang Cheng, Shane P White, William T Ruane, Bryan D Esser, David W McComb, P Chris Hammel, Fengyuan Yang
Low-damping magnetic materials have been widely used in microwave and spintronic applications because of their low energy loss and high sensitivity. While the Gilbert damping constant can reach 10(-4) to 10(-5) in some insulating ferromagnets, metallic ferromagnets generally have larger damping due to magnon scattering by conduction electrons. Meanwhile, low-damping metallic ferromagnets are desired for charge-based spintronic devices. Here, we report the growth of Co25Fe75 epitaxial films with excellent crystalline quality evident by the clear Laue oscillations and exceptionally narrow rocking curve in the X-ray diffraction scans as well as from scanning transmission electron microscopy...
August 10, 2017: Nature Communications
https://www.readbyqxmd.com/read/28753942/quercetin-and-green-tea-extract-supplementation-downregulates-genes-related-to-tissue-inflammatory-responses-to-a-12-week-high-fat-diet-in-mice
#4
Lynn Cialdella-Kam, Sujoy Ghosh, Mary Pat Meaney, Amy M Knab, R Andrew Shanely, David C Nieman
Quercetin (Q) and green tea extract (E) are reported to counter insulin resistance and inflammation and favorably alter fat metabolism. We investigated whether a mixture of E + Q (EQ) could synergistically influence metabolic and inflammation endpoints in a high-fat diet (HFD) fed to mice. Male C57BL/6 mice (n = 40) were put on HFD (fat = 60%kcal) for 12 weeks and randomly assigned to Q (25 mg/kg of body weight (BW)/day), E (3 mg of epigallocatechin gallate/kg BW/day), EQ, or control groups for four weeks. At 16 weeks, insulin sensitivity was measured via the glucose tolerance test (GTT), followed by area-under-the-curve (AUC) estimations...
July 19, 2017: Nutrients
https://www.readbyqxmd.com/read/28750215/binge-pattern-cocaine-administration-causes-long-lasting-behavioral-hyperarousal-but-does-not-enhance-vulnerability-to-single-prolonged-stress-in-rats
#5
Michael J Lisieski, Shane A Perrine
Cocaine use disorder and post-traumatic stress disorder (PTSD) commonly co-occur. This could be due to vulnerability to post-traumatic symptoms conferred by previous exposure to cocaine. Therefore, we combined chronic binge-pattern cocaine with a model of psychological trauma (single prolonged stress) to determine whether the behavioral effects of psychological trauma are enhanced in cocaine-sensitized individuals. Adult male Sprague Dawley rats received 14 days of cocaine (15mg/kg/injection) or saline in a binge pattern (3 injections per day, 1h apart)...
July 14, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28747531/remarkable-size-spectra-stability-in-a-marine-system-undergoing-massive-invasion
#6
Yehezkel Buba, Itai van Rijn, Shane A Blowes, Oren Sonin, Dor Edelist, John P DeLong, Jonathan Belmaker
The Mediterranean Sea is an invasion hotspot, with non-indigenous species suspected to be a major driver behind community changes. We used size spectra, a reliable index of food web structure, to examine how the influx of Red Sea fishes into the Mediterranean Sea has impacted the indigenous species community. This is the first attempt to use changes in the size spectra to reveal the effect of biological invasions. We used data from trawl catches along Israel's shoreline spanning 20 years to estimate changes in the community size spectra of both indigenous and non-indigenous species...
July 2017: Biology Letters
https://www.readbyqxmd.com/read/28726405/fluorescence-enhancement-of-unconstrained-gfp-chromophore-analogues-based-on-the-push-pull-substituent-effect
#7
Meng-Shiue Tsai, Chun-Lin Ou, Chi-Jui Tsai, Yen-Chin Huang, Yuan-Chung Cheng, Shih-Sheng Sun, Jye-Shane Yang
Unlike the high fluorescence quantum yield of the naturally occurring green fluorescence protein (GFP, Φf ∼ 0.8), the GFP chromophore, a benzylidenedimethylimidazolinone (BDI) dye, is nearly nonfluorescent (Φf < 0.001) in common solutions at room temperature. While many efforts have been devoted into the BDI chromophore engineering for fluorescence recovery, limited success has been achieved for structurally unconstrained GFP chromophore analogues (uGFPc). Herein we report a rational design of uGFPc toward an unprecedentedly high fluorescence quantum efficiency of 0...
July 20, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28724491/comparison-of-antemortem-and-environmental-samples-for-zebrafish-health-monitoring-and-quarantine
#8
Marcus J Crim, Christian Lawrence, Robert S Livingston, Andrei Rakitin, Shane J Hurley, Lela K Riley
Molecular diagnostic assays offer both exquisite sensitivity and the ability to test a wide variety of sample types. Various types of environmental sample, such as detritus and concentrated water, might provide a useful adjunct to sentinels in routine zebrafish health monitoring. Similarly, antemortem sampling would be advantageous for expediting zebrafish quarantine, without euthanasia of valuable fish. We evaluated the detection of Mycobacterium chelonae, M. fortuitum, M. peregrinum, Pseudocapillaria tomentosa, and Pseudoloma neurophilia in zebrafish, detritus, pooled feces, and filter membranes after filtration of 1000-, 500-, and 150-mL water samples by real-time PCR analysis...
July 1, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28701701/systematic-discovery-of-genetic-modulation-by-jumonji-histone-demethylases-in-drosophila
#9
Nevine A Shalaby, Raheel Sayed, Qiao Zhang, Shane Scoggin, Susan Eliazer, Adrian Rothenfluh, Michael Buszczak
Jumonji (JmjC) domain proteins influence gene expression and chromatin organization by way of histone demethylation, which provides a means to regulate the activity of genes across the genome. JmjC proteins have been associated with many human diseases including various cancers, developmental and neurological disorders, however, the shared biology and possible common contribution to organismal development and tissue homeostasis of all JmjC proteins remains unclear. Here, we systematically tested the function of all 13 Drosophila JmjC genes...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28692867/sulfate-transport-kinetics-and-toxicity-are-modulated-by-sodium-in-aquatic-insects
#10
Shane Scheibener, Justin M Conley, David Buchwalter
The salinization of freshwater ecosystems is emerging as a major ecological issue. Several anthropogenic causes of salinization (e.g. surface coal mining, hydro-fracking, road de-icing, irrigation of arid lands, etc.) are associated with biodiversity losses in freshwater ecosystems. Because insects tend to dominate freshwater ecology, it is important that we develop a better understanding of how and why different species respond to salinity matrices dominated by different major ions. This study builds upon previous work demonstrating that major ion toxicity to the mayfly Neocloeon triangulifer was apparently due to the ionic composition of water rather than specific conductance...
September 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28660473/assessing-the-value-of-biosimilars-a-review-of-the-role-of-budget-impact-analysis
#11
REVIEW
Steven Simoens, Ira Jacobs, Robert Popovian, Leah Isakov, Lesley G Shane
Biosimilar drugs are highly similar to an originator (reference) biologic, with no clinically meaningful differences in terms of safety or efficacy. As biosimilars offer the potential for lower acquisition costs versus the originator biologic, evaluating the economic implications of the introduction of biosimilars is of interest. Budget impact analysis (BIA) is a commonly used methodology. This review of published BIAs of biosimilar fusion proteins and/or monoclonal antibodies identified 12 unique publications (three full papers and nine congress posters)...
June 28, 2017: PharmacoEconomics
https://www.readbyqxmd.com/read/28636886/sirt1-enzymatically-potentiates-1-25-dihydroxyvitamin-d3-signaling-via-vitamin-d-receptor-deacetylation
#12
Marya S Sabir, Zainab Khan, Chengcheng Hu, Michael A Galligan, Christopher M Dussik, Sanchita Mallick, Angelika Dampf Stone, Shane F Batie, Elizabeth T Jacobs, G Kerr Whitfield, Mark R Haussler, Michael C Heck, Peter W Jurutka
The hormonal metabolite of vitamin D, 1,25-dihydroxyvitamin D3 (1,25D), binds to the vitamin D receptor (VDR) and promotes heterodimerization of VDR with a retinoid-X-receptor (RXR) to genomically regulate diverse cellular processes. Herein, it is revealed for the first time that VDR is post-translationally acetylated, and that VDR immunoprecipitated from human embryonic kidney (HEK293) cells displays a dramatic decrease in acetylated receptor in the presence of 1,25D-ligand, sirtuin-1 (SIRT1) deacetylase, or the resveratrol activator of SIRT1...
September 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28626552/a-new-microfluidic-approach-for-the-one-step-capture-amplification-and-label-free-quantification-of-bacteria-from-raw-samples
#13
Iago Pereiro, Amel Bendali, Sanae Tabnaoui, Lucile Alexandre, Jana Srbova, Zuzana Bilkova, Shane Deegan, Lokesh Joshi, Jean-Louis Viovy, Laurent Malaquin, Bruno Dupuy, Stéphanie Descroix
A microfluidic method to specifically capture and detect infectious bacteria based on immunorecognition and proliferative power is presented. It involves a microscale fluidized bed in which magnetic and drag forces are balanced to retain antibody-functionalized superparamagnetic beads in a chamber during sample perfusion. Captured cells are then cultivated in situ by infusing nutritionally-rich medium. The system was validated by the direct one-step detection of Salmonella Typhimurium in undiluted unskimmed milk, without pre-treatment...
February 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28613836/design-and-performance-of-a-novel-interface-for-combined-matrix-assisted-laser-desorption-ionization-at-elevated-pressure-and-electrospray-ionization-with-orbitrap-mass-spectrometry
#14
Mikhail E Belov, Shane R Ellis, Marialaura Dilillo, Martin R L Paine, William F Danielson, Gordon A Anderson, Erik L de Graaf, Gert B Eijkel, Ron M A Heeren, Liam A McDonnell
Matrix-Assisted Laser Desorption Ionization, MALDI, has been increasingly used in a variety of biomedical applications, including tissue imaging of clinical tissue samples, and in drug discovery and development. These studies strongly depend on the performance of the analytical instrumentation and would drastically benefit from improved sensitivity, reproducibility, and mass/spatial resolution. In this work, we report on a novel combined MALDI/ESI interface, which was coupled to different Orbitrap mass spectrometers (Elite and Q Exactive Plus) and extensively characterized with peptide and protein standards, and in tissue imaging experiments...
June 28, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28584610/the-usefulness-of-nap-sleep-recording-during-routine-electroencephalography-an-audit-study
#15
Sami Farah Al-Rawas, Khidir M Abdelbasit, Huda Hussain Al-Lawati, Rajesh Poothrikovil, Amal Khalfan Al-Rawahi, Abdul Aleem Khan, Robert Shane Delamont
OBJECTIVES: A measure to increase the electroencephalogram (EEG) outcome includes a short period of nap sleep during a routine standard EEG with the aim of increasing its sensitivity to interictal abnormalities or provoking seizures. As part of an ongoing auditing of our EEG data, we aimed to investigate the contribution of nap sleep during routine outpatient department based EEGs requested for a variety of reasons. METHODS: EEG data at the Department of Clinical Physiology at Sultan Qaboos University Hospital, Oman, from July 2006 to December 2007 and from January 2009 to December 2010 (total 42 months) were reviewed...
May 2017: Oman Medical Journal
https://www.readbyqxmd.com/read/28548368/developing-minimum-clinical-standards-for-physiotherapy-in-south-african-icus-a-qualitative-study
#16
Heleen van Aswegen, Shane Patman, Natascha Plani, Susan Hanekom
RATIONALE, AIMS, AND OBJECTIVES: Physiotherapists are integral members of the intensive care unit (ICU) team. Clinicians working in ICU are dependent on their own experience when making decisions regarding individual patient management thus resulting in variation in clinical practice. No formalized clinical practice guidelines or standards exist for the educational profile or scope of practice requirements for ICU physiotherapy. This study explored perceptions of physiotherapists on minimum clinical standards that ICU physiotherapists should adhere to for delivering safe, effective physiotherapy services to critically ill patients...
May 26, 2017: Journal of Evaluation in Clinical Practice
https://www.readbyqxmd.com/read/28547318/a-systematic-review-of-alpha-2-agonists-for-sedation-in-mechanically-ventilated-neurocritical-care-patients
#17
Alexandre Tran, Henrietta Blinder, Brian Hutton, Shane W English
The use of sedative medications is commonplace in intensive care units (ICUs) and an invaluable clinical tool for the intensive care physician. Sedation for critically ill, mechanically ventilated patients provides an opportunity to reduce anxiety, discomfort as well as ventilator intolerance and dyssynchrony. Alpha-2 agonists in particular have become increasingly popular for use in the neurocritical care population due to their proposed effectiveness in facilitating examinations and procedures as well as reducing the need for adjunctive agents...
May 25, 2017: Neurocritical Care
https://www.readbyqxmd.com/read/28546650/samango-monkeys-cercopithecus-albogularis-labiatus-manage-risk-in-a-highly-seasonal-human-modified-landscape-in-amathole-mountains-south-africa
#18
Katarzyna Nowak, Kirsten Wimberger, Shane A Richards, Russell A Hill, Aliza le Roux
Wild species use habitats that vary in risk across space and time. This risk can derive from natural predators and also from direct and indirect human pressures. A starving forager will often take risks that a less hungry forager would not. At a highly seasonal and human-modified site, we predicted that arboreal samango monkeys (Cercopithecus albogularis labiatus) would show highly flexible, responsive, risk-sensitive foraging. We first determined how monkeys use horizontal and vertical space across seasons to evaluate if high-risk decisions (use of gardens and ground) changed with season, a proxy for starvation risk...
2017: International Journal of Primatology
https://www.readbyqxmd.com/read/28516834/comparison-of-antemortem-and-environmental-samples-for-zebrafish-health-monitoring-and-quarantine
#19
Marcus J Crim, Christian Lawrence, Robert S Livingston, Andrei Rakitin, Shane J Hurley, Lela K Riley
Molecular diagnostic assays offer both exquisite sensitivity and the ability to test a wide variety of sample types. Varioustypes of environmental sample, such as detritus and concentrated water, might provide a useful adjunct to sentinels in routinezebrafish health monitoring. Similarly, antemortem sampling would be advantageous for expediting zebrafish quarantine,without euthanasia of valuable fish. We evaluated the detection of Mycobacterium chelonae, M. fortuitum, M. peregrinum,Pseudocapillaria tomentosa, and Pseudoloma neurophilia in zebrafish, detritus, pooled feces, and filter membranes after filtration of 1000-, 500-, and 150-mL water samples by real-time PCR analysis...
May 17, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28465825/investigation-of-antimicrobial-use-at-a-tertiary-care-hospital-in-southern-punjab-pakistan-using-who-methodology
#20
Muhammad Atif, Muhammad Azeem, Anum Saqib, Shane Scahill
BACKGROUND: Globally, between 20 to 50% of antimicrobial consumption is inappropriate, causing significant impact on the quality of care, cost of therapy and incidence of adverse drug reactions. The purpose of this study was to investigate the prescribing patterns and utilization of antimicrobials in ten selected wards at Bahawal Victoria Hospital (BVH), Bahawalpur, Punjab, Pakistan. METHODS: A descriptive cross-sectional study was designed using the World Health Organization (WHO) indicators for antimicrobial use...
2017: Antimicrobial Resistance and Infection Control
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