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https://www.readbyqxmd.com/read/28446632/dietary-methionine-restriction-regulates-liver-protein-synthesis-and-gene-expression-independently-of-eukaryotic-initiation-factor-2-phosphorylation-in-mice
#1
Ashley P Pettit, William O Jonsson, Albert R Bargoud, Emily T Mirek, Frederick F Peelor, Yongping Wang, Thomas W Gettys, Scot R Kimball, Benjamin F Miller, Karyn L Hamilton, Ronald C Wek, Tracy G Anthony
Background: The phosphorylation of eukaryotic initiation factor 2 (p-eIF2) during dietary amino acid insufficiency reduces protein synthesis and alters gene expression via the integrated stress response (ISR).Objective: We explored whether a Met-restricted (MR) diet activates the ISR to reduce body fat and regulate protein balance.Methods: Male and female mice aged 3-6 mo with either whole-body deletion of general control nonderepressible 2 (Gcn2) or liver-specific deletion of protein kinase R-like endoplasmic reticulum kinase (Perk) alongside wild-type or floxed control mice were fed an obesogenic diet sufficient in Met (0...
April 26, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28443785/acute-and-long-term-impact-of-high-protein-diets-on-endocrine-and-metabolic-function-body-composition-and-exercise-induced-adaptations
#2
Flor E Morales, Grant M Tinsley, Paul M Gordon
BACKGROUND: High-protein diets have been shown to improve body composition through alterations in satiety, muscle protein synthesis, and the thermic effect of food. AIM: Given these findings, the purpose of this review is to discuss the integration of the specific hormonal and metabolic effects of high-protein diets following both acute and long-term usage, especially with regard to body composition. METHODS: Full-text articles were obtained through PubMed by using the terms "high-protein diet and body composition," "high-protein diet and exercise," "high-protein diet risk," "high-protein diet side effects," "protein quality PDCAAS," "RDA for protein," and "daily protein recommendation...
April 26, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28443020/bgp-15-protects-against-oxaliplatin-induced-skeletal-myopathy-and-mitochondrial-reactive-oxygen-species-production-in-mice
#3
James C Sorensen, Aaron C Petersen, Cara A Timpani, Dean G Campelj, Jordan Cook, Adam J Trewin, Vanesa Stojanovska, Mathew Stewart, Alan Hayes, Emma Rybalka
Chemotherapy is a leading intervention against cancer. Albeit highly effective, chemotherapy has a multitude of deleterious side-effects including skeletal muscle wasting and fatigue, which considerably reduces patient quality of life and survivability. As such, a defense against chemotherapy-induced skeletal muscle dysfunction is required. Here we investigate the effects of oxaliplatin (OXA) treatment in mice on the skeletal muscle and mitochondria, and the capacity for the Poly ADP-ribose polymerase (PARP) inhibitor, BGP-15, to ameliorate any pathological side-effects induced by OXA...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28442947/a-high-fat-diet-induces-a-loss-of-midbrain-dopaminergic-neuronal-function-that-underlies-motor-abnormalities
#4
Yunseon Jang, Min Joung Lee, Jeongsu Han, Soo Jeong Kim, Ilhwan Ryu, Xianshu Ju, Min Jeong Ryu, Woosuk Chung, Eungseok Oh, Gi Ryang Kweon, Jun Young Heo
Movement defects in obesity are associated with peripheral muscle defects, arthritis, and dysfunction of motor control by the brain. Although movement functionality is negatively correlated with obesity, the brain regions and downstream signaling pathways associated with movement defects in obesity are unclear. A dopaminergic neuronal pathway from the substantia nigra (SN) to the striatum is responsible for regulating grip strength and motor initiation through tyrosine hydroxylase (TH) activity-dependent dopamine release...
April 2017: Experimental Neurobiology
https://www.readbyqxmd.com/read/28442780/the-effect-of-body-composition-and-serum-inflammatory-markers-on-the-functional-muscle-bone-unit-in-premenopausal-women
#5
S M Mueller, I Herter-Aeberli, A C Cepeda-Lopez, M Flück, H H Jung, M Toigo
BACKGROUND/OBJECTIVES: A number of recent studies dealing with the relationship between the effects of high body mass (BM) and fat mass (FM) on bone mass and strength exhibit a range of contrasting variations in their findings. These diverse findings have led to an ongoing controversy as to whether high BM and FM positively or negatively affect bone mass and strength. Excessive fat mass and the associated low-grade inflammation might overturn the higher mechanical stimulus arising from a higher body mass...
April 26, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28441760/supplementation-with-a-polyphenol-rich-extract-perfload-%C3%A2-improves-physical-performance-during-high-intensity-exercise-a-randomized-double-blind-crossover-trial
#6
Julien Cases, Cindy Romain, Cristian Marín-Pagán, Linda H Chung, José Miguel Rubio-Pérez, Caroline Laurent, Sylvie Gaillet, Emmanuelle Prost-Camus, Michel Prost, Pedro E Alcaraz
Workout capacity is energy-production driven. To produce peak metabolic power outputs, the organism predominantly relies more on anaerobic metabolism, but this undoubtedly has a negative and limiting impact on muscle function and performance. The aim of the study was to evaluate if an innovative polyphenol-based food supplement, PerfLoad(®), was able to improve metabolic homeostasis and physical performance during high-intensity exercises under anaerobic conditions. The effect of a supplementation has been investigated on fifteen recreationally-active male athletes during a randomized, double-blind and crossover clinical investigation...
April 24, 2017: Nutrients
https://www.readbyqxmd.com/read/28439569/the-obesity-paradox-in-kidney-disease-how-to-reconcile-it-with-obesity-management
#7
Kamyar Kalantar-Zadeh, Connie M Rhee, Jason Chou, S Foad Ahmadi, Jongha Park, Joline Lt Chen, Alpesh N Amin
Obesity, a risk factor for de novo chronic kidney disease (CKD), confers survival advantages in advanced CKD. This so-called obesity paradox is the archetype of the reverse epidemiology of cardiovascular risks, in addition to the lipid, blood pressure, adiponectin, homocysteine, and uric acid paradoxes. These paradoxical phenomena are in sharp contradistinction to the known epidemiology of cardiovascular risks in the general population. In addition to advanced CKD, the obesity paradox has also been observed in heart failure, chronic obstructive lung disease, liver cirrhosis, and metastatic cancer, as well as in the elderly...
March 2017: KI Reports
https://www.readbyqxmd.com/read/28437606/transfer-study-of-silver-nanoparticles-in-poultry-production
#8
Federica Gallocchio, Giancarlo Biancotto, Veronica Cibin, Carmen Losasso, Simone Belluco, Ruud Peters, Greet van Bemmel, Claudia Cascio, Stefan Weigel, Peter Tromp, Federica Gobbo, Salvatore Catania, Antonia Ricci
Silver nanoparticles (AgNPs) are of interest due to their antimicrobial activity and are seen as potential candidates to replace antibiotics in animal husbandry. A few studies have focused on this new application, but they lack any considerations about residual accumulation of AgNPs in edible animal tissues and animal products. In this research, a 22 day in vivo study was carried out by oral administration of 20 nm spherical PVP coated AgNPs to hens. Six doses of approximately 1 mg kg(-1) of AgNPs-PVP each were administered to animals throughout the experimentation...
April 27, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28437200/effects-of-dietary-macronutrient-composition-on-fndc5-and-irisin-in-mice-skeletal-muscle
#9
Simone Moreira de Macêdo, Deborah de Farias Lelis, Keila Lopes Mendes, Carlos Alberto de Carvalho Fraga, Igor V Brandi, Jonh David Feltenberger, Lucyana Conceição Farias, André Luiz Sena Guimarães, Alfredo Maurício Batista de Paula, Sérgio Henrique de Sousa Santos
BACKGROUND: Fibronectin type III domain containing 5 (FNDC5) and its protein product Irisin are therapeutic targets for obesity-associated disorders. Irisin plays an important role in energy regulation, inducing browning of white adipocytes, and improving obesity. We aimed to investigate the association between muscle Irisin expression and dietary quality. METHODS: Twenty-eight female mice were divided into four groups and fed the following experimental diets for 60 days: standard diet (SD), high-carbohydrate diet (HCD), high-fat diet (HFD), and high-protein diet (HPD)...
May 2017: Metabolic Syndrome and related Disorders
https://www.readbyqxmd.com/read/28436858/a-spectral-ct-method-to-directly-estimate-basis-material-maps-from-experimental-photon-counting-data
#10
Taly Schmidt, Rina Barber, Emil Sidky
The proposed spectral CT method solves the constrained one-step spectral CT reconstruction (cOSSCIR) optimization problem to estimate basis material maps while modeling the nonlinear X-ray detection process and enforcing convex constraints on the basis map images. In order to apply the optimization-based reconstruction approach to experimental data, the presented method empirically estimates the effective energy-window spectra using a calibration procedure. The amplitudes of the estimated spectra were further optimized as part of the reconstruction process to reduce ring artifacts...
April 24, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28436338/the-effect-of-boswellia-serrata-resin-diet-supplementation-on-production-hematological-biochemical-and-immunological-parameters-in-broiler-chickens
#11
A R M Al-Yasiry, B Kiczorowska, W Samolińska, E Kowalczuk-Vasilev, D Kowalczyk-Pecka
Boswellia serrata resin (BSR), exhibiting a variety of therapeutic properties, is applied in Asian traditional medicine. These properties can be used in poultry production as well. Application of the resin as a phytobiotic in broiler chicken rearing can increase the productivity and improve meat quality. However, the optimum and maximum levels of BSR in broiler diets need to be assessed. The study determined the effect of different levels of supplementation of BSR (directly derived, unprocessed) in diets for broiler chickens on the production traits, selected slaughter analysis parameters, nutrient digestibility and selected hematological, biochemical and immunological parameters...
April 24, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28434761/improvement-in-nutritional-status-in-patients-with-chronic-kidney-disease-4-by-a-nutrition-education-program-with-no-impact-on-renal-function-and-determined-by-male-sex
#12
Almudena Pérez-Torres, Elena González Garcia, Helena Garcia-Llana, Gloria Del Peso, Ana María López-Sobaler, Rafael Selgas
OBJECTIVE: Protein-energy wasting (PEW) is associated with increased morbidity and mortality and a rapid deterioration of kidney function in patients with chronic kidney disease (CKD). However, there is little information regarding the effect of nutrition intervention. The aims of this study were to evaluate the efficacy and safety of a nutrition education program (NEP) in patients with nondialysis dependent CKD (NDD-CKD), based on the diagnostic criteria for PEW proposed by the International Society of Renal Nutrition and Metabolism...
April 20, 2017: Journal of Renal Nutrition
https://www.readbyqxmd.com/read/28434720/short-and-longer-term-effects-of-feeding-increased-metwabolizable-protein-with-or-without-an-altered-amino-acid-profile-to-dairy-cows-immediately-postpartum
#13
E G Carder, W P Weiss
The first few weeks after parturition is marked by low, but increasing feed intake and sharply increasing milk production by dairy cows. Because of low intake, the nutrient density of the diet may need to be higher during this period to support increasing milk yields. We hypothesized that feeding higher levels of metabolizable protein (MP) or a protein supplement with rumen-protected lysine and methionine during the immediate postpartum period would increase yields of milk and milk components. Fifty-six Holstein cows (21 primiparous and 35 multiparous) starting at 3 d in milk were used in a randomized block design...
April 20, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28432755/mitochondria-and-ageing-role-in-heart-skeletal-muscle-and-adipose-tissue
#14
REVIEW
Kerstin Boengler, Maik Kosiol, Manuel Mayr, Rainer Schulz, Susanne Rohrbach
Age is the most important risk factor for most diseases. Mitochondria play a central role in bioenergetics and metabolism. In addition, several lines of evidence indicate the impact of mitochondria in lifespan determination and ageing. The best-known hypothesis to explain ageing is the free radical theory, which proposes that cells, organs, and organisms age because they accumulate reactive oxygen species (ROS) damage over time. Mitochondria play a central role as the principle source of intracellular ROS, which are mainly formed at the level of complex I and III of the respiratory chain...
April 21, 2017: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/28432557/proteomic-analysis-of-mitochondrial-proteins-in-the-guinea-pig-heart-following-long-term-normobaric-hyperoxia
#15
Lucia Lichardusova, Zuzana Tatarkova, Andrea Calkovska, Daniela Mokra, Ivan Engler, Peter Racay, Jan Lehotsky, Peter Kaplan
Normobaric hyperoxia is applied for the treatment of a wide variety of diseases and clinical conditions related to ischemia or hypoxia, but it can increase the risk of tissue damage and its efficiency is controversial. In the present study, we analyzed cardiac mitochondrial proteome derived from guinea pigs after 60 h exposure to 100% molecular oxygen (NBO) or O2 enriched with oxygen cation (NBO+). Two-dimensional gel electrophoresis followed by MALDI-TOF/TOF mass spectrometry identified twenty-two different proteins (among them ten nonmitochondrial) that were overexpressed in NBO and/or NBO+ group...
April 21, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28432118/molecular-basis-for-exercise-induced-fatigue-the-importance-of-strictly-controlled-cellular-ca-2-handling
#16
Arthur J Cheng, Nicolas Place, Håkan Westerblad
The contractile function of skeletal muscle declines during intense or prolonged physical exercise, that is, fatigue develops. Skeletal muscle fibers fatigue acutely during highly intense exercise when they have to rely on anaerobic metabolism. Early stages of fatigue involve impaired myofibrillar function, whereas decreased Ca(2+) release from the sarcoplasmic reticulum (SR) becomes more important in later stages. SR Ca(2+) release can also become reduced with more prolonged, lower intensity exercise, and it is then related to glycogen depletion...
April 21, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28431912/osteosarcopenic-obesity-prevalence-and-relation-with-frailty-and-physical-performance-in-middle-aged-and-older-women
#17
Claudia Szlejf, Lorena Parra-Rodríguez, Oscar Rosas-Carrasco
OBJECTIVES: The aims of this study were to determine the prevalence of osteosarcopenic obesity (OSO) and to investigate its association with frailty and physical performance in Mexican community-dwelling middle-aged and older women. DESIGN: Cross-sectional analysis of a prospective cohort. SETTING: The FraDySMex study, a 2-round evaluation of community-dwelling adults from 2 municipalities in Mexico City. PARTICIPANTS: Participants were 434 women aged 50 years or older, living in the designated area in Mexico City...
April 18, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28431724/retrosternal-implantation-of-the-cardioverter-defibrillator-lead-in-an-infant
#18
Hiroaki Hata, Naokata Sumitomo, Toshiko Nakai, Atsushi Amano
Using an implantable cardioverter-defibrillator (ICD) in small children is still challenging, but the need is increasing. We present a new approach to overcoming ICD problems caused by growth in infants. A redundant ICD lead was fixed to the superior border of the sternum and tunneled retrosternally to the subxiphoid region for connection to the generator, which was placed in a pocket beneath the left transversus abdominis muscle. The redundant retrosternal part of the lead straightened during growth, while cardiac coverage by the cardioversion energy field and the defibrillation vector were maintained appropriately...
May 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28428966/nutrition-and-metabolism-in-burn-patients
#19
REVIEW
Audra Clark, Jonathan Imran, Tarik Madni, Steven E Wolf
Severe burn causes significant metabolic derangements that make nutritional support uniquely important and challenging for burned patients. Burn injury causes a persistent and prolonged hypermetabolic state and increased catabolism that results in increased muscle wasting and cachexia. Metabolic rates of burn patients can surpass twice normal, and failure to fulfill these energy requirements causes impaired wound healing, organ dysfunction, and susceptibility to infection. Adequate assessment and provision of nutritional needs is imperative to care for these patients...
2017: Burns and trauma
https://www.readbyqxmd.com/read/28427699/people-with-ms-are-less-physically-active-than-healthy-controls-but-as-active-as-those-with-other-chronic-diseases-an-updated-meta-analysis
#20
D Kinnett-Hopkins, B Adamson, K Rougeau, R W Motl
BACKGROUND: There has been remarkable growth in research examining physical activity behavior (any bodily movement produced by skeletal muscle contraction that results in energy expenditure) among people living with multiple sclerosis (MS) over the past decade. The current meta-analysis quantified physical activity participation levels in persons with MS compared with non-diseased and other clinical populations. METHODS: We searched PUBMED, PsycINFO and Web of Science using the keywords physical activity, exercise, and physical fitness in conjunction with MS...
April 2017: Multiple Sclerosis and related Disorders
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