keyword
MENU ▼
Read by QxMD icon Read
search

Exhaustion

keyword
https://www.readbyqxmd.com/read/28108650/aerobic-efficiency-is-associated-with-the-improvement-in-maximal-power-output-during-acute-hyperoxia
#1
Tom A Manselin, Olof Södergård, Filip J Larsen, Peter Lindholm
This study investigated the relationship between aerobic efficiency during cycling exercise and the increase in physical performance with acute hyperoxic exposure (FiO2 ~31%) (HOX) and also tested the hypothesis that fat oxidation could be increased by acute hyperoxia. Fourteen males and four females were recruited for two sessions, where they exercised for 2 × 10 min at 100 W to determine efficiency. HOX and normoxia (NOX) were administered randomly on both occasions to account for differences in nitrogen exchange...
January 2017: Physiological Reports
https://www.readbyqxmd.com/read/28108645/whole-body-hyperthermia-but-not-skin-hyperthermia-accelerates-brain-and-locomotor-limb-circulatory-strain-and-impairs-exercise-capacity-in-humans
#2
Steven J Trangmar, Scott T Chiesa, Kameljit K Kalsi, Niels H Secher, José González-Alonso
Cardiovascular strain and hyperthermia are thought to be important factors limiting exercise capacity in heat-stressed humans, however, the contribution of elevations in skin (Tsk) versus whole body temperatures on exercise capacity has not been characterized. To ascertain their relationships with exercise capacity, blood temperature (TB), oxygen uptake (V̇O2), brain perfusion (MCA Vmean), locomotor limb hemodynamics, and hematological parameters were assessed during incremental cycling exercise with elevated skin (mild hyperthermia; HYPmild), combined core and skin temperatures (moderate hyperthermia; HYPmod), and under control conditions...
January 2017: Physiological Reports
https://www.readbyqxmd.com/read/28108490/mri-shows-that-exhaustion-syndrome-due-to-chronic-occupational-stress-is-associated-with-partially-reversible-cerebral-changes
#3
I Savic, A Perski, W Osika
The present study investigates the cerebral effects of chronic occupational stress and its possible reversibility. Forty-eight patients with occupational exhaustion syndrome (29 women) and 80 controls (47 women) underwent structural magnetic resonance imaging (MRI) and neuropsychological testing. Forty-four participants (25 patients, 19 controls) also completed a second MRI scan after 1-2 years. Only patients received cognitive therapy. The stressed group at intake had reduced thickness in the right prefrontal cortex (PFC) and left superior temporal gyrus (STG), enlarged amygdala volumes, and reduced caudate volumes...
January 19, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28108205/modifying-the-phenotypic-frailty-model-in-predicting-risk-of-major-osteoporotic-fracture-in-the-elderly
#4
Guowei Li, Alexandra Papaioannou, Lehana Thabane, Mitchell A H Levine, George Ioannidis, Andy K O Wong, Arthur Lau, Jonathan D Adachi
INTRODUCTION: The phenotypic frailty (PF) model (including slow walking, low physical activity, exhaustion, weakness, and unintentional weight loss) has been widely used to quantify the degree of frailty and predict risks of adverse health outcomes for the elderly. However, evidence has shown that not all the components included in the PF model contribute equally, and low predictive accuracy of the PF model has been reported in predicting risks of outcomes. We aimed to improve predictive accuracy of the PF model in risk of major osteoporotic fracture (MOF) in the elderly by modifying its weighting of individual components...
January 17, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28107894/heart-rate-variability-biofeedback-therapy-and-graded-exercise-training-in-management-of-chronic-fatigue-syndrome-an-exploratory-pilot-study
#5
Petra Windthorst, Nazar Mazurak, Marvin Kuske, Arno Hipp, Katrin E Giel, Paul Enck, Andreas Nieß, Stephan Zipfel, Martin Teufel
OBJECTIVE: Chronic fatigue syndrome (CFS) is characterised by persistent fatigue, exhaustion, and several physical complaints. Research has shown cognitive behavioural therapy (CBT) and graded exercise training (GET) to be the most effective treatments. In a first step we aimed to assess the efficacy of heart rate variability biofeedback therapy (HRV-BF) as a treatment method comprising cognitive and behavioural strategies and GET in the pilot trial. In a second step we aimed to compare both interventions with regard to specific parameters...
February 2017: Journal of Psychosomatic Research
https://www.readbyqxmd.com/read/28107813/prevalence-of-frailty-in-canadians-18-79-years-old-in-the-canadian-health-measures-survey
#6
Dustin Scott Kehler, Thomas Ferguson, Andrew N Stammers, Clara Bohm, Rakesh C Arora, Todd A Duhamel, Navdeep Tangri
BACKGROUND: There is little certainty as to the prevalence of frailty in Canadians in younger adulthood. This study examines and compares the prevalence of frailty in Canadians 18-79 years old using the Accumulation of Deficits and Fried models of frailty. METHODS: The Canadian Health Measures Study data were used to estimate the prevalence of frailty in adults 18-79 years old. A 23-item Frailty Index using the Accumulation of Deficits Model (cycles 1-3; n = 10,995) was developed; frailty was defined as having the presence of 25% or more indices, including symptoms, chronic conditions, and laboratory variables...
January 21, 2017: BMC Geriatrics
https://www.readbyqxmd.com/read/28106980/structural-snapshots-of-an-engineered-cystathionine-%C3%AE-lyase-reveal-the-critical-role-of-electrostatic-interactions-in-the-active-site
#7
Wupeng Yan, Everett M Stone, Yan Jessie Zhang
Enzyme therapeutics that can degrade L-methionine (L-Met) are of great interest as numerous malignancies are exquisitely sensitive to L-Met depletion. To exhaust the pool of the methionine in human serum, we previously engineered an L-Met degrading enzyme based on the human cystathionine-γ-lyase scaffold (hCGL-NLV) in order to circumvent immunogenicity and stability issues observed in the preclinical application of bacterial derived methionine-γ-lyases (MGL). To gain further insights into structure/activity relationships governing the chemistry of the hCGL-NLV lead molecule, we undertook a biophysical characterization campaign that captured crystal structures (2...
January 20, 2017: Biochemistry
https://www.readbyqxmd.com/read/28105754/process-of-becoming-a-mother-for-iranian-surrogacy-commissioning-mothers-a-grounded-theory-study
#8
Mitra Zandi, Zohreh Vanaki, Marziyeh Shiva, Eesa Mohammadi
AIM: Little knowledge is available about the experiences of the commissioning mothers during the process of surrogacy; thus, the present study was conducted in order to explore and analyze this process. METHODS: This study was conducted in a referral institute in Tehran with a qualitative approach and using grounded theory methodology. The data were collected through 39 unstructured, in-depth interviews that were conducted with 15 gestational commissioning mothers, two of their husbands, four surrogates, and four of the personnel at centers for assisted reproduction (some participants were interviewed more than once)...
January 20, 2017: Japan Journal of Nursing Science: JJNS
https://www.readbyqxmd.com/read/28104945/neonatal-and-infantile-spinal-sonography-a-useful-investigation-often-underutilized
#9
Nikhil Nair, M Sreenivas, Arun K Gupta, Devasenathipathy Kandasamy, Manisha Jana
Sonography is an ideal, effective, noninvasive tool for evaluation of the spinal cord in neonatal and early infantile age groups owing to lack of ossification of the posterior elements of spine. Understanding normal anatomical appearances is a prerequisite for the interpretation of various pathologies of the spinal canal and its contents. This review elucidates normal appearances of the spinal cord in this age group, in both axial and sagittal planes. Usefulness of Doppler sonography is briefly discussed, and special emphasis is placed on normal anatomical variants that may mimic spinal abnormalities...
October 2016: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/28104239/cd8-t-cells-of-chronic-hcv-infected-patients-express-multiple-negative-immune-checkpoints-following-stimulation-with-hcv-peptides
#10
Muttiah Barathan, Rosmawati Mohamed, Jamuna Vadivelu, Li Yen Chang, Ramachandran Vignesh, Jayalakshmi Krishnan, Panneer Sigamani, Alireza Saeidi, M Ravishankar Ram, Vijayakumar Velu, Marie Larsson, Esaki M Shankar
Hepatitis C virus (HCV)-specific CD4+ and CD8+ T cells are key to successful viral clearance in HCV disease. Accumulation of exhausted HCV-specific T cells during chronic infection results in considerable loss of protective functional immune responses. The role of T-cell exhaustion in chronic HCV disease remains poorly understood. Here, we studied the frequency of HCV peptide-stimulated T cells expressing negative immune checkpoints (PD-1, CTLA-4, TRAIL, TIM-3 and BTLA) by flow cytometry, and measured the levels of Th1/Th2/Th17 cytokines secreted by T cells by a commercial Multi-Analyte ELISArray™ following in vitro stimulation of T cells using HCV peptides and phytohemagglutinin (PHA)...
December 16, 2016: Cellular Immunology
https://www.readbyqxmd.com/read/28103564/mograms-a-network-based-methodology-for-visualizing-the-set-of-nondominated-solutions-in-multiobjective-optimization
#11
Krzysztof Trawinski, Manuel Chica, David P Pancho, Sergio Damas, Oscar Cordon
An appropriate visualization of multiobjective nondominated solutions is a valuable asset for decision making. Although there are methods for visualizing the solutions in the design space, they do not provide any information about their relationship. In this paper, we propose a novel methodology that allows the visualization of the nondominated solutions in the design space and their relationships by means of a network. The nodes represent the solutions in the objective space while the edges show the relationships among the solutions in the design space...
January 16, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28103239/identifying-t-cell-receptors-from-high-throughput-sequencing-dealing-with-promiscuity-in-tcr%C3%AE-and-tcr%C3%AE-pairing
#12
Edward S Lee, Paul G Thomas, Jeff E Mold, Andrew J Yates
Characterisation of the T cell receptors (TCR) involved in immune responses is important for the design of vaccines and immunotherapies for cancer and autoimmune disease. The specificity of the interaction between the TCR heterodimer and its peptide-MHC ligand derives largely from the juxtaposed hypervariable CDR3 regions on the TCRα and TCRβ chains, and obtaining the paired sequences of these regions is a standard for functionally defining the TCR. A brute force approach to identifying the TCRs in a population of T cells is to use high-throughput single-cell sequencing, but currently this process remains costly and risks missing small clones...
January 19, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28102757/dysbiosis-in-crohn-s-disease-joint-action-of-stochastic-injuries-and-focal-inflammation-in-the-gut
#13
Ludovica F Buttó, Dirk Haller
Gut homeostasis involves interrelated biological networks that include the immune system, specialized cells of the epithelium, such as Paneth and goblet cells, as well as triggers derived from the microbiota. Disruption of these homeostatic interactions may lead to the pathogenesis of inflammatory bowel diseases (IBD). To develop more targeted and individual treatments in Crohn's disease and ulcerative colitis, it becomes more and more important to link key mechanisms of the disease pathogenesis to distinct IBD subsets...
January 19, 2017: Gut Microbes
https://www.readbyqxmd.com/read/28102232/aetiology-and-management-of-hereditary-aortopathy
#14
REVIEW
Aline Verstraeten, Ilse Luyckx, Bart Loeys
Aortic aneurysms are a major health problem because they account for 1-2% of all deaths in the Western population. Although abdominal aortic aneurysms (AAAs) are more prevalent than thoracic aortic aneurysms (TAAs), TAAs have been more exhaustively studied over the past 2 decades because they have a higher heritability and affect younger individuals. Gene identification in both syndromic and nonsyndromic TAA is proceeding at a rapid pace and has already pinpointed >20 genes associated with familial TAA risk...
January 19, 2017: Nature Reviews. Cardiology
https://www.readbyqxmd.com/read/28101907/increased-arf-p53-activity-in-stem-cells-aging-and-cancer
#15
REVIEW
Estefania Carrasco-Garcia, Manuel Moreno, Leire Moreno-Cugnon, Ander Matheu
Arf/p53 pathway protects the cells against DNA damage induced by acute stress. This characteristic is the responsible for its tumor suppressor activity. Moreover, it regulates the chronic type of stress associated with aging. This is the basis of its anti-aging activity. Indeed, increased gene dosage of Arf/p53 displays elongated longevity and delayed aging. At a cellular level, it has been recently shown that increased dosage of Arf/p53 delays age-associated stem cell exhaustion and the subsequent decline in tissue homeostasis and regeneration...
January 19, 2017: Aging Cell
https://www.readbyqxmd.com/read/28100240/reactivation-of-dormant-anti-tumor-immunity-a-clinical-perspective-of-therapeutic-immune-checkpoint-modulation
#16
REVIEW
Richard Greil, Evelyn Hutterer, Tanja Nicole Hartmann, Lisa Pleyer
In favor of their outgrowth, cancer cells must resist immune surveillance and edit the immune response. Cancer immunoediting is characterized by fundamental changes in the cellular composition and the inflammatory cytokine profiles in the microenvironment of the primary tumor and metastatic niches, with an ever increasing complexity of interactions between tumor cells and the immune system. Recent data suggest that genetic instability and immunoediting are not necessarily disparate processes. Increasing mutational load may be associated with multiple neoepitopes expressed by the tumor cells and thus increased chances for the immune system to recognize and combat these cells...
January 19, 2017: Cell Communication and Signaling: CCS
https://www.readbyqxmd.com/read/28100227/prenatal-and-postnatal-mothering-by-diesel-exhaust-pm2-5-exposed-dams-differentially-program-mouse-energy-metabolism
#17
Minjie Chen, Shuai Liang, Huifen Zhou, Yanyi Xu, Xiaobo Qin, Ziying Hu, Xiaoke Wang, Lianglin Qiu, Wanjun Wang, Yuhao Zhang, Zhekang Ying
BACKGROUND: Obesity is one of the leading threats to global public health. It is consequent to abnormal energy metabolism. Currently, it has been well established that maternal exposure to environmental stressors that cause inappropriate fetal development may have long-term adverse effects on offspring energy metabolism in an exposure timing-dependent manner, known as developmental programming of health and diseases paradigm. Rapidly increasing evidence has indicated that maternal exposure to ambient fine particles (PM2...
January 18, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28099864/satb1-expression-governs-epigenetic-repression-of-pd-1-in-tumor-reactive-t-cells
#18
Tom L Stephen, Kyle K Payne, Ricardo A Chaurio, Michael J Allegrezza, Hengrui Zhu, Jairo Perez-Sanz, Alfredo Perales-Puchalt, Jenny M Nguyen, Ana E Vara-Ailor, Evgeniy B Eruslanov, Mark E Borowsky, Rugang Zhang, Terri M Laufer, Jose R Conejo-Garcia
Despite the importance of programmed cell death-1 (PD-1) in inhibiting T cell effector activity, the mechanisms regulating its expression remain poorly defined. We found that the chromatin organizer special AT-rich sequence-binding protein-1 (Satb1) restrains PD-1 expression induced upon T cell activation by recruiting a nucleosome remodeling deacetylase (NuRD) complex to Pdcd1 regulatory regions. Satb1 deficienct T cells exhibited a 40-fold increase in PD-1 expression. Tumor-derived transforming growth factor β (Tgf-β) decreased Satb1 expression through binding of Smad proteins to the Satb1 promoter...
January 17, 2017: Immunity
https://www.readbyqxmd.com/read/28099863/satb1-restraining-pd1-and-t-cell-exhaustion
#19
Briana G Nixon, Ming O Li
Mechanisms that govern PD1 expression and exhaustion in T cells are not fully understood. In this issue of Immunity, Stephen et al. (2017) uncover a key role for the genome organizer Satb1 in restraining PD1 expression and promoting tumor immunity.
January 17, 2017: Immunity
https://www.readbyqxmd.com/read/28099451/drawbacks-of-dialysis-procedures-for-removal-of-edta
#20
Andreia Mónico, Eva Martínez-Senra, F Javier Cañada, Silvia Zorrilla, Dolores Pérez-Sala
Ethylenediaminetetraacetic acid (EDTA) is a chelating agent commonly used in protein purification, both to eliminate contaminating divalent cations and to inhibit protease activity. For a number of subsequent applications EDTA needs to be exhaustively removed. Most purification methods rely in extensive dialysis and/or gel filtration in order to exchange or remove protein buffer components, including metal chelators. We report here that dialysis protocols, even as extensive as those typically employed for protein refolding, may not effectively remove EDTA, which is reduced only by approximately two-fold and it also persists after spin-column gel filtration, as determined by NMR and by colorimetric methods...
2017: PloS One
keyword
keyword
19039
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"