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Applied physiology

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https://www.readbyqxmd.com/read/28823036/muscular-responses-appear-to-be-associated-with-existence-of-kinesthetic-perception-during-combination-of-tendon-co-vibration-and-motor-imagery
#1
Eriko Shibata, Fuminari Kaneko, Masaki Katayose
The afferent inputs from peripheral sensory receptors and efferent signals from the central nervous system that underlie intentional movement can contribute to kinesthetic perception. Previous studies have revealed that tendon vibration to wrist muscles elicits an excitatory response-known as the antagonist vibratory response-in muscles antagonistic to the vibrated muscles. Therefore, the present study aimed to further investigate the effect of tendon vibration combined with motor imagery on kinesthetic perception and muscular activation...
August 19, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28823008/neuropathic-pain-s-biopsychosocial-effects
#2
Esra Dogru Huzmeli, Ismet Melek
The aim of our study is to understand neuropathic pain's social, psychological, and biological effects on the patients. All of the patients who were diagnosed with neuropathic pain (NP) by a neurologist were invited to participate in the study. The diagnoses were made based on the patients' history and symptoms and the results of their neurological examinations. Demographic characteristics (age and pain duration), diagnoses, and medical histories of the patients were recorded. Average daily pain intensity was measured using a 100-mm visual analogue scale (VAS)...
August 19, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28822812/determinants-of-thermostability-in-the-cytochrome-p450-fold
#3
REVIEW
Kurt L Harris, Raine E S Thomson, Silja J Strohmaier, Yosephine Gumulya, Elizabeth M J Gillam
Cytochromes P450 are found throughout the biosphere in a wide range of environments, serving a multitude of physiological functions. The ubiquity of the P450 fold suggests that it has been co-opted by evolution many times, and likely presents a useful compromise between structural stability and conformational flexibility. The diversity of substrates metabolized and reactions catalyzed by P450s makes them attractive starting materials for use as biocatalysts of commercially useful reactions. However, process conditions impose different requirements on enzymes to those in which they have evolved naturally...
August 16, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28821028/targeted-gene-delivery-of-polyethyleneimine-grafted-chitosan-with-rgd-dendrimer-peptide-in-%C3%AE-v%C3%AE-3-integrin-overexpressing-tumor-cells
#4
Young-Min Kim, Seong-Cheol Park, Mi-Kyeong Jang
The safe and effective delivery of genetic material into cells is a necessary factor for gene therapy. Although a wide range of materials, methods, and combinations have been reported, successful gene therapy has been limited. In the present study, a targeted gene carrier for αvβ3 integrin-overexpressing tumor cells was designed using widely applied materials containing water soluble chitosan (WSC), RGD peptide, and polyethyleneimine (PEI). The physiological characteristics, in vitro targeted gene transfection, cytotoxicity, blood-compatibility, and cellular distributions were investigated...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28820903/prominent-facilitation-at-beta-and-gamma-frequency-range-revealed-with-physiological-calcium-concentration-in-adult-mouse-piriform-cortex-in-vitro
#5
Marie Gleizes, Simon P Perrier, Caroline Fonta, Lionel G Nowak
Neuronal activity is characterized by a diversity of oscillatory phenomena that are associated with multiple behavioral and cognitive processes, yet the functional consequences of these oscillations are not fully understood. Our aim was to determine whether and how these different oscillatory activities affect short-term synaptic plasticity (STP), using the olfactory system as a model. In response to odorant stimuli, the olfactory bulb displays a slow breathing rhythm as well as beta and gamma oscillations...
2017: PloS One
https://www.readbyqxmd.com/read/28820206/a-cross-platform-metabolomics-workflow-for-volume-restricted-tissue-samples-application-to-an-animal-model-for-polycystic-kidney-disease
#6
E Sánchez-López, H Happé, E Steenvoorden, A L Crego, M L Marina, D J M Peters, O A Mayboroda
Metabolic profiling provides an unbiased view of the physiological status of an organism as a "function" of the metabolic composition of a measured sample. Here, we propose a simple LC-MS based workflow for metabolic profiling of volume-restricted samples, namely individual 20 μm-thick histological sections of a mouse kidney. The main idea of this workflow is to re-use the material after an RPLC-MS run, namely using the volume remaining in the vial after injection, and then introducing a phase changing step to enable HILIC-MS analysis...
August 18, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28820044/determination-of-fusarium-toxins-in-functional-vegetable-milks-applying-salting-out-assisted-liquid-liquid-extraction-combined-with-ultra-high-performance-liquid-chromatography-tandem-mass-spectrometry
#7
Ahmed M Hamed, Natalia Arroyo-Manzanares, Ana M García-Campaña, Laura Gámiz-Gracia
Vegetable milks are considered as functional foods due to their physiological benefits. Although the consumption of these products has significantly increased, they have received little attention in legislation, as regard to contaminants. However, they may contain mycotoxins resulting from the use of contaminated raw materials. In this work, ultra-high performance liquid chromatography tandem mass spectrometry has been proposed for the determination of the most relevant Fusarium toxins (fumonisin B1 and B2, HT-2 and T-2 toxins, zearalenone, deoxynivalenol and fusarenon-X) in different functional beverages based on cereals, legumes and seeds...
August 18, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28818833/using-whiteboards-to-support-college-students-learning-of-complex-physiological-concepts
#8
Caron Y Inouye, Christine L Bae, Kathryn N Hayes
Research underscores the importance of retrieval-based practice and application of knowledge for meaningful learning. However, the didactic lecture format continues to persist in traditional university physiology courses. A strategy called whiteboarding, where students use handheld dry erase boards and work in small groups to actively retrieve, discuss, and apply concepts presented in the lecture, has the potential to address challenges associated with actively engaging students in science courses for greater learning...
September 1, 2017: Advances in Physiology Education
https://www.readbyqxmd.com/read/28818688/anodization-of-magnesium-for-biomedical-applications-processing-characterization-degradation-and-cytocompatibility
#9
Aaron F Cipriano, Jiajia Lin, Christopher Miller, Alan Lin, Mayra C Cortez Alcaraz, Pedro Soria, Huinan Liu
This article reports anodization of Mg in KOH electrolyte and the associated surface, degradation, and biological properties for bioresorbable implant applications. The preparation procedures for electrodes and anodization setup significantly enhanced reproducibility of samples. The results of anodization performed at the applied potentials of 1.8, 1.9, or 2.0 V showed that the sample anodized at 1.9 V and annealed, referred to as the 1.9 AA sample, had homogenous surface microstructure and elemental composition, and a reduction in corrosion current density in the electrochemical testing...
August 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28818583/timing-of-fertile-period-for-successful-pregnancy-in-american-bully-dogs
#10
Sang-Eun Hahn, Young-Kwang Jo, Yun-Kyong Jin, Goo Jang
Determination of the timing of the estrus cycle is essential for fertile mating. There are physiological variations among breeds, between bitches, and between cycles of the same bitch. If serial monitoring and many tools are applied, the exact moment of ovulation could be pin-pointed. However, it leads to time and costly difficulties. Progesterone concentrations during estrus cycles follow a specific pattern, and it is largely used in timing of fertile period. Although it has similar pattern in general, it is likely that breed-specific differences exist...
July 26, 2017: Theriogenology
https://www.readbyqxmd.com/read/28817717/short-report-trpv1-polymorphism-1911-a-g-alters-capsaicin-induced-sensory-changes-in-healthy-subjects
#11
Julia Forstenpointner, Matti Förster, Denisa May, Friederike Hofschulte, Ingolf Cascorbi, Gunnar Wasner, Janne Gierthmühlen, Ralf Baron
BACKGROUND: C-fibers express transient receptor potential (TRP) channels. These high-voltage gated channels function as integrators of different physical stresses (e.g. heat, protons, ATP). Additionally channel activation can be induced by capsaicin. Topically applied, capsaicin elicits burning pain, heat and mechanical hyperalgesia and serves as a human surrogate model for pain. It was suggested that the TRPV1-variant rs8065080 (1911A>G) plays a pivotal role in patients with neuropathic pain syndromes...
2017: PloS One
https://www.readbyqxmd.com/read/28817288/in-silico-modeling-approach-for-the-evaluation-of-gastrointestinal-dissolution-supersaturation-and-precipitation-of-posaconazole
#12
Bart Hens, Shriram M Pathak, Amitava Mitra, Nikunjkumar Patel, Bo Liu, Sanjaykumar Patel, Masoud Jamei, Joachim Brouwers, Patrick Augustijns, David B Turner
The aim of this study was to evaluate gastrointestinal (GI) dissolution, supersaturation, and precipitation of posaconazole, formulated as an acidified (pH 1.6) and neutral (pH 7.1) suspension. A physiologically-based pharmacokinetic (PBPK) modeling and simulation tool was applied to simulate GI and systemic concentration-time profiles of posaconazole which were directly compared with intraluminal and systemic data measured in humans. The Advanced Dissolution Absorption and Metabolism (ADAM) model of the Simcyp® Simulator correctly simulated incomplete gastric dissolution and saturated duodenal concentrations of posaconazole in the duodenal fluids following administration of the neutral suspension...
August 17, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28817100/modulatory-effects-of-exogenously-applied-polyamines-on-postharvest-physiology-antioxidant-system-and-shelf-life-of-fruits-a-review
#13
REVIEW
Sunil Sharma, Sunil Pareek, Narashans Alok Sagar, Daniel Valero, Maria Serrano
Polyamines (PAs) are natural compounds involved in many growth and developmental processes in plants, and, specifically in fruits, play a vital role regulating its development, ripening and senescence processes. Putrescine (PUT), spermine (SPE), and spermidine (SPD) are prominent PAs applied exogenously to extend shelf life of fruits. They also originate endogenously during developmental phases of horticultural crops and simultaneously affect the quality attributes and shelf life. Their anti-ethylene nature is being exploited to enhance the shelf life when exogenously applied on fruits...
August 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28814739/re-characterization-of-the-glomerulopathy-in-cd2ap-deficient-mice-by-high-resolution-helium-ion-scanning-microscopy
#14
Kenji Tsuji, Teodor G Păunescu, Hani Suleiman, Dongping Xie, Fahmy A Mamuya, Jeffrey H Miner, Hua A Jenny Lu
Helium ion scanning microscopy (HIM) is a novel technology that directly visualizes the cell surface ultrastructure without surface coating. Despite its very high resolution, it has not been applied extensively to study biological or pathology samples. Here we report the application of this powerful technology to examine the three-dimensional ultrastructural characteristics of proteinuric glomerulopathy in mice with CD2-associated protein (CD2AP) deficiency. HIM revealed the serial alteration of glomerular features including effacement and disorganization of the slit diaphragm, followed by foot process disappearance, flattening and fusion of major processes, and eventual transformation into a podocyte sheet as the disease progressed...
August 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28813897/design-and-testing-of-an-under-actuated-surface-emg-driven-hand-exoskeleton
#15
A Lince, N Celadon, A Battezzato, A Favetto, S Appendino, P Ariano, M Paleari
Stroke and other neurological pathologies are an increasing cause of hand impairment, involving expensive rehabilitative therapies. In this scenario, robotics applied to hand rehabilitation and assistance appears particularly promising in order to lower therapy costs and boost its efficacy. This work shows a recently conceived hand exoskeleton, from the design and realization to its preliminary evaluation. A control strategy based on surface electromyography (sEMG) signals is integrated: preliminary tests performed on healthy subjects show the validity of this choice...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813566/a-nonlinear-generalization-of-the-savitzky-golay-filter-and-the-quantitative-analysis-of-saccades
#16
Weiwei Dai, Ivan Selesnick, John-Ross Rizzo, Janet Rucker, Todd Hudson
The Savitzky-Golay (SG) filter is widely used to smooth and differentiate time series, especially biomedical data. However, time series that exhibit abrupt departures from their typical trends, such as sharp waves or steps, which are of physiological interest, tend to be oversmoothed by the SG filter. Hence, the SG filter tends to systematically underestimate physiological parameters in certain situations. This article proposes a generalization of the SG filter to more accurately track abrupt deviations in time series, leading to more accurate parameter estimates (e...
August 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28813537/metabolite-patterns-predicting-sex-and-age-in-participants-of-the-karlsruhe-metabolomics-and-nutrition-karmen-study
#17
Manuela J Rist, Alexander Roth, Lara Frommherz, Christoph H Weinert, Ralf Krüger, Benedikt Merz, Diana Bunzel, Carina Mack, Björn Egert, Achim Bub, Benjamin Görling, Pavleta Tzvetkova, Burkhard Luy, Ingrid Hoffmann, Sabine E Kulling, Bernhard Watzl
Physiological and functional parameters, such as body composition, or physical fitness are known to differ between men and women and to change with age. The goal of this study was to investigate how sex and age-related physiological conditions are reflected in the metabolome of healthy humans and whether sex and age can be predicted based on the plasma and urine metabolite profiles. In the cross-sectional KarMeN (Karlsruhe Metabolomics and Nutrition) study 301 healthy men and women aged 18-80 years were recruited...
2017: PloS One
https://www.readbyqxmd.com/read/28811983/a-novel-spinal-implant-for-fusionless-scoliosis-correction-a-biomechanical-analysis-of-the-motion-preserving-properties-of-a-posterior-periapical-concave-distraction-device
#18
Roderick M Holewijn, Marinus de Kleuver, Albert J van der Veen, Kaj S Emanuel, Arno Bisschop, Agnita Stadhouder, Barend J van Royen, Idsart Kingma
STUDY DESIGN: Biomechanical study. OBJECTIVE: Recently, a posterior concave periapical distraction device for fusionless scoliosis correction was introduced. The goal of this study was to quantify the effect of the periapical distraction device on spinal range of motion (ROM) in comparison with traditional rigid pedicle screw-rod instrumentation. METHODS: Using a spinal motion simulator, 6 human spines were loaded with 4 N m and 6 porcine spines with 2 N m to induce flexion-extension (FE), lateral bending (LB), and axial rotation (AR)...
August 2017: Global Spine Journal
https://www.readbyqxmd.com/read/28811364/mechanosensing-drives-acuity-of-%C3%AE-%C3%AE-t-cell-recognition
#19
Yinnian Feng, Kristine N Brazin, Eiji Kobayashi, Robert J Mallis, Ellis L Reinherz, Matthew J Lang
T lymphocytes use surface [Formula: see text] T-cell receptors (TCRs) to recognize peptides bound to MHC molecules (pMHCs) on antigen-presenting cells (APCs). How the exquisite specificity of high-avidity T cells is achieved is unknown but essential, given the paucity of foreign pMHC ligands relative to the ubiquitous self-pMHC array on an APC. Using optical traps, we determine physicochemical triggering thresholds based on load and force direction. Strikingly, chemical thresholds in the absence of external load require orders of magnitude higher pMHC numbers than observed physiologically...
August 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28811339/heritable-bovine-rumen-bacteria-are-phylogenetically-related-and-correlated-with-the-cow-s-capacity-to-harvest-energy-from-its-feed
#20
Goor Sasson, Sheerli Kruger Ben-Shabat, Eyal Seroussi, Adi Doron-Faigenboim, Naama Shterzer, Shamay Yaacoby, Margret E Berg Miller, Bryan A White, Eran Halperin, Itzhak Mizrahi
Ruminants sustain a long-lasting obligatory relationship with their rumen microbiome dating back 50 million years. In this unique host-microbiome relationship, the host's ability to digest its feed is completely dependent on its coevolved microbiome. This extraordinary alliance raises questions regarding the dependent relationship between ruminants' genetics and physiology and the rumen microbiome structure, composition, and metabolism. To elucidate this relationship, we examined the association of host genetics with the phylogenetic and functional composition of the rumen microbiome...
August 15, 2017: MBio
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