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Applied physiology

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https://www.readbyqxmd.com/read/29679661/evolutionary-compromises-to-metabolic-toxins-ammonia-and-urea-tolerance-in-drosophila-suzukii-and-drosophila-melanogaster
#1
Virginia Belloni, Alessia Galeazzi, Giulia Bernini, Mauro Mandrioli, Elisabetta Versace, Albrecht Haase
The invasive pest Drosophila suzukii has evolved morphological and behavioural adaptations to lay eggs under the skin of fresh fruits. This results in severe damage to a wide range of small fruits. Drosophila suzukii females typically lay few eggs per fruit, preferring healthy fruits. Hence, larvae are exposed to a reduced amount of nitrogenous waste. Differently, the innocuous Drosophila melanogaster lays eggs on fermented fruits already infested by conspecifics, with larvae developing in a crowded environment with the accumulation of nitrogenous waste such as ammonia and urea...
April 18, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29679183/effects-of-respiratory-and-applied-muscle-tensing-interventions-on-responses-to-a-simulated-blood-draw-among-individuals-with-high-needle-fear
#2
Jennifer M Kowalsky, Robert Conatser, Thomas Ritz, Christopher R France
Fear of blood and needles increases risk for presyncopal symptoms. Applied muscle tension can prevent or attenuate presyncopal symptoms; however, it is not universally effective. This study examined the effects of applied muscle tension, a respiratory intervention, and a no treatment control condition, on presyncopal symptoms and cerebral oxygenation, during a simulated blood draw with individuals highly fearful of needles. Participants (n = 95) completed questionnaires, physiological monitoring, and two trials of a simulated blood draw with recovery...
April 20, 2018: Journal of Behavioral Medicine
https://www.readbyqxmd.com/read/29679077/proteome-wide-analysis-of-cysteine-oxidation-reveals-metabolic-sensitivity-to-redox-stress
#3
Jiska van der Reest, Sergio Lilla, Liang Zheng, Sara Zanivan, Eyal Gottlieb
Reactive oxygen species (ROS) are increasingly recognised as important signalling molecules through oxidation of protein cysteine residues. Comprehensive identification of redox-regulated proteins and pathways is crucial to understand ROS-mediated events. Here, we present stable isotope cysteine labelling with iodoacetamide (SICyLIA), a mass spectrometry-based workflow to assess proteome-scale cysteine oxidation. SICyLIA does not require enrichment steps and achieves unbiased proteome-wide sensitivity. Applying SICyLIA to diverse cellular models and primary tissues provides detailed insights into thiol oxidation proteomes...
April 20, 2018: Nature Communications
https://www.readbyqxmd.com/read/29677517/gpr68-senses-flow-and-is-essential-for-vascular-physiology
#4
Jie Xu, Jayanti Mathur, Emilie Vessières, Scott Hammack, Keiko Nonomura, Julie Favre, Linda Grimaud, Matt Petrus, Allain Francisco, Jingyuan Li, Van Lee, Fu-Li Xiang, James K Mainquist, Stuart M Cahalan, Anthony P Orth, John R Walker, Shang Ma, Viktor Lukacs, Laura Bordone, Michael Bandell, Bryan Laffitte, Yan Xu, Shu Chien, Daniel Henrion, Ardem Patapoutian
Mechanotransduction plays a crucial role in vascular biology. One example of this is the local regulation of vascular resistance via flow-mediated dilation (FMD). Impairment of this process is a hallmark of endothelial dysfunction and a precursor to a wide array of vascular diseases, such as hypertension and atherosclerosis. Yet the molecules responsible for sensing flow (shear stress) within endothelial cells remain largely unknown. We designed a 384-well screening system that applies shear stress on cultured cells...
April 19, 2018: Cell
https://www.readbyqxmd.com/read/29676613/workshop-report-using-social-media-and-smartphone-applications-in-practical-lessons-to-enhance-student-learning-in-b%C3%A3%C2%BAzios-brazil-august-6-8-2017
#5
Camilo Lellis-Santos, Patricia A Halpin
Cost-effective student engagement poses a challenge for instructors, especially those who may not be familiar with new technologies and mobile devices. In this workshop, participants, experienced and discussed two ways of using smartphones in physiology classes: to engage in an online learning environment for discussions, and to make physiological measurements. Participants signed up for individual Twitter accounts and learned how to tweet, retweet, message, use a URL shortener, and use hashtags. They then went on to locate articles on an assigned topic from the Twitter accounts of credible science sources ( American Journal of Physiology, The Scientist, CDC...
June 1, 2018: Advances in Physiology Education
https://www.readbyqxmd.com/read/29675337/highly-diluted-acetylcholine-promotes-wound-repair-in-an-in-vivo-model
#6
Francesca Uberti, Vera Morsanuto, Sabrina Ghirlanda, Sara Ruga, Nausicaa Clemente, Cristina Boieri, Renzo Boldorini, Claudio Molinari
Objective: Wound healing is a dynamic, interactive, and complex process that involves a series of events, including inflammation, migration, proliferation, granulation tissue formation, and matrix remodeling. Despite the high frequency of serious slow-healing wounds, there is still no adequate therapy. The aim of this study is to evaluate a new highly diluted acetylcholine (Ach) formulation obtained through a sequential kinetic activation (SKA) method applied to a wound healing in vivo model to verify the hypothesis that a low dose of Ach could be a more physiological stimulus for healing, by stimulating muscarinic and nicotinic receptors and their related intracellular pathways...
April 1, 2018: Advances in Wound Care
https://www.readbyqxmd.com/read/29675315/hydrogen-peroxide-and-glucose-concentration-measurement-using-optical-fiber-grating-sensors-with-corrodible-plasmonic-nanocoatings
#7
Xuejun Zhang, Ze Wu, Fu Liu, Qiangqiang Fu, Xiaoyong Chen, Jian Xu, Zhaochuan Zhang, Yunyun Huang, Yong Tang, Tuan Guo, Jacques Albert
We propose and demonstrate hydrogen peroxide (H2 O2 ) and glucose concentration measurements using a plasmonic optical fiber sensor. The sensor utilizes a tilted fiber Bragg grating (TFBG) written in standard single mode communication fiber. The fiber is over coated with an nm-scale film of silver that supports surface plasmon resonances (SPRs). Such a tilted grating SPR structure provides a high density of narrow spectral resonances (Q-factor about 105 ) that overlap with the broader absorption band of the surface plasmon waves in the silver film, thereby providing an accurate tool to measure small shifts of the plasmon resonance frequencies...
April 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29674714/mechanisms-of-physiological-and-pathological-cardiac-hypertrophy
#8
REVIEW
Michinari Nakamura, Junichi Sadoshima
Cardiomyocytes exit the cell cycle and become terminally differentiated soon after birth. Therefore, in the adult heart, instead of an increase in cardiomyocyte number, individual cardiomyocytes increase in size, and the heart develops hypertrophy to reduce ventricular wall stress and maintain function and efficiency in response to an increased workload. There are two types of hypertrophy: physiological and pathological. Hypertrophy initially develops as an adaptive response to physiological and pathological stimuli, but pathological hypertrophy generally progresses to heart failure...
April 19, 2018: Nature Reviews. Cardiology
https://www.readbyqxmd.com/read/29674020/cyanine-based-nir-fluorescent-probe-for-monitoring-h-2-s-and-imaging-in-living-cells-and-in-vivo
#9
Jiacheng Xiong, Lili Xia, Qili Huang, Jinxin Huang, Yueqing Gu, Peng Wang
As a critical gaseous signaling molecule, H2 S is involved in various biological processes. To deeper study the physiological and pathological roles of H2 S, convenient and efficient detection techniques for endogenous H2 S in vivo are still in urgent demand. Herein, we reported a new turn-on Near-infrared (NIR) fluorescence probe NIR-H2 S based on thiolysis reactions for detection of H2 S. The probe possessed many excellent properties including high sensitivity and selectivity, good cell-membrane permeability, and low cytotoxicity...
July 1, 2018: Talanta
https://www.readbyqxmd.com/read/29673837/movements-of-older-adults-during-exergaming-interventions-that-are-associated-with-the-systems-framework-for-postural-control-a-systematic-review
#10
REVIEW
Robin Tahmosybayat, Katherine Baker, Alan Godfrey, Nick Caplan, Gill Barry
One in three older adults fall annually, in part due to impairments in the physiological systems that make up the postural control (PC) system. Exercise, particularly balance training, helps to prevent deterioration and even to improve outcomes in the PC system. Exergaming (exercise-gaming) is interactive computer gaming whereby an individual moves the body in response to onscreen cues in a playful format. Exergaming is an alternative method to standard practice for improving PC outcomes, which has been shown to reduce the risk of falling...
May 2018: Maturitas
https://www.readbyqxmd.com/read/29673529/neurochemistry-of-anesthetic-states
#11
Ralph Lydic, Helen A Baghdoyan, Amanda L May
Anesthetic mechanisms that eliminate consciousness and perception of pain are products of the nervous system. Chemical approaches to the study of anesthetic mechanisms have the potential to serve as an ideal interface between basic and clinical neuroscience. There are disproportionately more basic neurochemical studies than clinical studies of anesthetic mechanisms. Even within neuroscience, the study of anesthetic mechanisms is sparse. The Society for Neuroscience hosts one of the world's largest and most vibrant scientific meetings, yet the content themes of that meeting do not include anesthesia...
2018: Methods in Enzymology
https://www.readbyqxmd.com/read/29673279/advanced-development-of-primary-pancreatic-organoid-tumor-models-for-high-throughput-phenotypic-drug-screening
#12
Shurong Hou, Hervé Tiriac, Banu Priya Sridharan, Louis Scampavia, Franck Madoux, Jan Seldin, Glauco R Souza, Donald Watson, David Tuveson, Timothy P Spicer
Traditional high-throughput drug screening in oncology routinely relies on two-dimensional (2D) cell models, which inadequately recapitulate the physiologic context of cancer. Three-dimensional (3D) cell models are thought to better mimic the complexity of in vivo tumors. Numerous methods to culture 3D organoids have been described, but most are nonhomogeneous and expensive, and hence impractical for high-throughput screening (HTS) purposes. Here we describe an HTS-compatible method that enables the consistent production of organoids in standard flat-bottom 384- and 1536-well plates by combining the use of a cell-repellent surface with a bioprinting technology incorporating magnetic force...
April 1, 2018: SLAS Discovery
https://www.readbyqxmd.com/read/29672394/effects-of-vitamin-b-complex-and-vitamin-c-on-human-skin-cells-is-the-perceived-effect-measurable
#13
Julian-Dario Rembe, Carolin Fromm-Dornieden, Ewa Klara Stuermer
OBJECTIVE: Vitamins are essential for human health. In terms of local application for wound healing, vitamins' positive effect remains unclear. However, because of the regular appearance of nutritional deficiency in chronic wound patients, a favorable impact of locally applied vitamins can be hypothesized. METHODS: Vitamins B3, B5, B6, B7, B9, B10, B12, and C individually as well as different combinations of B vitamins were investigated regarding their ability to promote proliferation and migration of human skin fibroblasts and keratinocytes...
May 2018: Advances in Skin & Wound Care
https://www.readbyqxmd.com/read/29671707/prediction-of-cognitive-performance-and-subjective-sleepiness-using-a-model-of-arousal-dynamics
#14
Svetlana Postnova, Steven W Lockley, Peter A Robinson
A model of arousal dynamics is applied to predict objective performance and subjective sleepiness measures, including lapses and reaction time on a visual Performance Vigilance Test (vPVT), performance on a mathematical addition task (ADD), and the Karolinska Sleepiness Scale (KSS). The arousal dynamics model is comprised of a physiologically based flip-flop switch between the wake- and sleep-active neuronal populations and a dynamic circadian oscillator, thus allowing prediction of sleep propensity. Published group-level experimental constant routine (CR) and forced desynchrony (FD) data are used to calibrate the model to predict performance and sleepiness...
April 2018: Journal of Biological Rhythms
https://www.readbyqxmd.com/read/29671262/developing-mammalian-cellular-clock-models-using-firefly-luciferase-reporter
#15
Chidambaram Ramanathan, Andrew C Liu
In mammals, many aspects of metabolic, physiological, and behavioral processes are regulated by endogenous circadian clocks. Oscillators of different tissue types share a common molecular mechanism at the cellular and molecular level which underlies the rhythmic expression of genes. Individual cells are the functional units for rhythm generation and cell-based clock models offer experimental tractability for discovery. Cellular clock models can be developed by introducing a noninvasive and readily detectable luciferase bioluminescence reporter as a rhythmic output, in which the promoter of a rhythmically expressed gene is fused with the firefly luciferase (Luc) gene...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29670226/analysis-for-patient-survival-after-open-abdomen-for-torso-trauma-and-the-impact-of-achieving-primary-fascial-closure-a-single-center-experience
#16
Yu-Pao Hsu, Yon-Cheong Wong, Chih-Yuan Fu, Shang-Yu Wang, Chien-Hung Liao, Chun-Hsiang Ou Yang, Kuo-Ching Yuan
Open abdomen indicates the abdominal fascia is unclosed to abbreviate surgery and to reduce physiological stress. However, complications and difficulties in patient care are often encountered after operation. During May 2008 to March 2013, we performed a prospective protocol-directed observation study regarding open abdomen use in trauma patients. Bogota bag is the temporary abdomen closure initially but negative pressure dressing is used later. A goal-directed ICU care is applied and primary fascial closure is the primary endpoint...
April 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29668681/a-longitudinal-1h-nmr-metabolomics-analysis-of-urine-from-newborns-with-hypoxic-ischemic-encephalopathy-undergoing-hypothermia-therapy-clinical-and-medical-legal-insights
#17
Emanuela Locci, Antonio Noto, Melania Puddu, Giulia Pomero, Roberto Demontis, Cristina Dalmazzo, Antonio Delogu, Vassilios Fanos, Ernesto d'Aloja, Paolo Gancia
Perinatal asphyxia is an event affecting around four million newborns worldwide. The 0.5 to 2 per 1000 of full term asphyxiated newborns suffer from hypoxic-ischemic encephalopathy (HIE), which is a frequent cause of death or severe disability and, as consequence, the most common birth injury claim for obstetrics, gynaecologists, and paediatricians. Perinatal asphyxia results from a compromised gas exchange that leads to hypoxemia, hypercapnia, and metabolic acidosis. In this work, we applied a metabolomics approach to investigate the metabolic profiles of urine samples collected from full term asphyxiated newborns with HIE undergoing therapeutic hypothermia (TH), with the aim of identifying a pattern of metabolites associated with HIE and to follow their modifications over time...
2018: PloS One
https://www.readbyqxmd.com/read/29667150/topical-application-of-omega-3-omega-6-and-omega-9-rich-oil-emulsions-for-cutaneous-wound-healing-in-rats
#18
Wan Maznah Wan Ishak, Haliza Katas, Ng Pei Yuen, Maizaton Atmadini Abdullah, Mohd Hanif Zulfakar
Wound healing is a physiological event that generates reconstitution and restoration of granulation tissue that ends with scar formation. As omega fatty acids are part of membrane phospholipids and participate in the inflammatory response, we investigated the effects of omega-3, omega-6, and omega-9 fatty acids in the form of oils on wound healing. Linseed (LO), evening primrose (EPO), and olive oils (OO) rich in omega-3, omega-6, and omega-9 fatty acids were formulated into emulsions and were topically applied on rats with excision wounds...
April 17, 2018: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/29666752/pathways-of-topological-rank-analysis-potra-a-novel-method-to-detect-pathways-involved-in-hepatocellular-carcinoma
#19
Chaoxing Li, Li Liu, Valentin Dinu
Complex diseases such as cancer are usually the result of a combination of environmental factors and one or several biological pathways consisting of sets of genes. Each biological pathway exerts its function by delivering signaling through the gene network. Theoretically, a pathway is supposed to have a robust topological structure under normal physiological conditions. However, the pathway's topological structure could be altered under some pathological condition. It is well known that a normal biological network includes a small number of well-connected hub nodes and a large number of nodes that are non-hubs...
2018: PeerJ
https://www.readbyqxmd.com/read/29666293/fast-or-slow-rescue-ventilations-a-predictive-model-of-gastric-inflation
#20
John R Fitz-Clarke
BACKGROUND: Rescue ventilations are given during respiratory and cardiac arrest. Tidal volume must assure oxygen delivery; however, excessive pressure applied to an unprotected airway can cause gastric inflation, regurgitation, and pulmonary aspiration. The optimal technique provides mouth pressure and breath duration that minimize gastric inflation. It remains unclear if breath delivery should be fast or slow, and how inflation time affects the division of gas flow between the lungs and esophagus...
April 17, 2018: Respiratory Care
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