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https://www.readbyqxmd.com/read/28526870/time-course-responses-of-circulating-micrornas-to-three-resistance-training-protocols-in-healthy-young-men
#1
Shufang Cui, Biao Sun, Xin Yin, Xia Guo, Dingming Chao, Chunni Zhang, Chen-Yu Zhang, Xi Chen, Jizheng Ma
Circulating microRNAs (c-miRNAs) in human plasma have been described as a potential marker of exercise. The present study investigated the effects of three acute resistance training (RT) protocols on the time-course changes of the c-miRNAs profiles in young males. The subjects (n = 45) were randomly divided into three groups: muscular strength endurance (SE), muscular hypertrophy (MH) and maximum strength (MS). Venous blood samples were obtained before exercise and immediately, 1 h and 24 h after each RT protocol to assess the following biological parameters: c-miRNAs, anabolic and catabolic hormones, inflammatory cytokines and muscle damage markers...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28511942/effect-of-resistant-and-digestible-rice-starches-on-human-cytokine-and-lactate-metabolic-networks-in-serum
#2
Huisong Wang, Guangchang Pang
Resistant starch generated after treating ordinary starch is of great significance to human health in the countries with overnutrition. However, its functional evaluation in the human body has been rarely reported. By determining the lactate metabolic flux, 12 serum enzymes expression level and 38 serum cytokines in healthy volunteers, the variation in cytokine network and lactate metabolic network in serum were investigated to compare the mechanism of the physiological effects between the two starches. The results indicated that compared with digestible starch, resistant starch had anti-inflammatory effects, increased anabolism, and decreased catabolism...
May 13, 2017: Cytokine
https://www.readbyqxmd.com/read/28505227/resveratrol-enhances-exercise-induced-cellular-and-functional-adaptations-of-skeletal-muscle-in-older-men-and-women
#3
Stephen E Alway, Jean L McCrory, Kalen Kearcher, Austen Vickers, Benjamin Frear, Diana L Gilleland, Daniel E Bonner, James M Thomas, David A Donley, Mathew W Lively, Junaith S Mohamed
Older men (n = 12) and women (n = 18) 65-80 years of age completed 12 weeks of exercise and took either a placebo or resveratrol (500 mg/d) to test the hypothesis that resveratrol treatment combined with exercise would increase mitochondrial density, muscle fatigue resistance and cardiovascular function more than exercise alone. Contrary to our hypothesis, aerobic and resistance exercise coupled with resveratrol treatment did not reduce cardiovascular risk further than exercise alone. However, exercise added to resveratrol treatment improved the indices of mitochondrial density, and muscle fatigue resistance more than placebo and exercise treatments...
May 13, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28493406/beta-hydroxy-beta-methylbutyrate-supplementation-and-skeletal-muscle-in-healthy-and-muscle-wasting-conditions
#4
REVIEW
Milan Holeček
Beta-hydroxy-beta-methylbutyrate (HMB) is a metabolite of the essential amino acid leucine that has been reported to have anabolic effects on protein metabolism. The aims of this article were to summarize the results of studies of the effects of HMB on skeletal muscle and to examine the evidence for the rationale to use HMB as a nutritional supplement to exert beneficial effects on muscle mass and function in various conditions of health and disease. The data presented here indicate that the beneficial effects of HMB have been well characterized in strength-power and endurance exercise...
May 10, 2017: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/28493326/hyperglycaemia-and-aberrated-insulin-signalling-stimulate-tumour-progression-via-induction-of-the-extracellular-matrix-component-hyaluronan
#5
Sören Twarock, Christina Reichert, Ulrike Peters, Daniel J Gorski, Katharina Röck, Jens W Fischer
Epidemiological studies have detected a higher incidence of various tumour entities in diabetic patients. However, the underlying mechanisms remain insufficiently understood. Glucose-derived pericellular and extracellular hyaluronan (HA) promotes tumour progression and development. In this study, we tested the hypothesis that a diabetic metabolic state, characterised by hyperglycaemia and concomitant aberrant insulin signalling, stimulates tumour progression via the induction of HA synthesis. In a streptozotocin-induced diabetic nude mouse tumour xenograft model, hyperglycaemia and lack of insulin caused an increased formation of tumour-associated HA-matrix, which in turn accelerated tumour progression and neoangiogenesis...
May 10, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28486400/growth-hormone-resistance-special-focus-on-inflammatory-bowel-disease
#6
REVIEW
Christoffer Soendergaard, Jonathan A Young, John J Kopchick
Growth hormone (GH) plays major anabolic and catabolic roles in the body and is important for regulating several aspects of growth. During an inflammatory process, cells may develop a state of GH resistance during which their response to GH stimulation is limited. In this review, we will emphasize specific mechanisms governing the formation of GH resistance in the active phase of inflammatory bowel disease. The specific molecular effects mediated through individual inflammatory mediators and processes will be highlighted to provide an overview of the transcriptional, translational and post-translational inflammation-mediated impacts on the GH receptor (GHR) along with the impacts on GH-induced intracellular signaling...
May 9, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28458804/nutrition-pharmacological-and-training-strategies-adopted-by-six-bodybuilders-case-report-and-critical-review
#7
Paulo Gentil, Claudio Andre Barbosa de Lira, Antonio Paoli, José Alexandre Barbosa Dos Santos, Roberto Deivide Teixeira da Silva, José Romulo Pereira Junior, Edson Pereira da Silva, Rodrigo Ferro Magosso
The purpose of this study was to report and analyze the practices adopted by bodybuilders in light of scientific evidence and to propose evidence-based alternatives. Six (four male and two female) bodybuilders and their coaches were directly interviewed. According to the reports, the quantity of anabolic steroids used by the men was 500-750 mg/week during the bulking phase and 720-1160 mg during the cutting phase. The values for women were 400 and 740 mg, respectively. The participants also used ephedrine and hydrochlorothiazide during the cutting phase...
February 24, 2017: European Journal of Translational Myology
https://www.readbyqxmd.com/read/28449327/skeletal-muscle-il-15-il-15r%C3%AE-and-myofibrillar-protein-synthesis-after-resistance-exercise
#8
Alberto Pérez-López, James McKendry, Marcos Martin-Rincon, David Morales-Alamo, Bárbara Pérez-Köhler, David Valadés, Julia Buján, Jose A L Calbet, Leigh Breen
In vitro and in vivo studies described the myokine IL-15 and its receptor IL-15Rα as anabolic/anti-atrophy agents, however the protein expression of IL-15Rα has not been measured in human skeletal muscle and data regarding IL-15 expression remain inconclusive. The purpose of the study was to determine serum and skeletal muscle IL-15 and IL-15Rα responses to resistance exercise session and to analyse their association with myofibrillar protein synthesis (MPS). Fourteen participants performed a bilateral leg resistance exercise composed of 4 sets of leg press and 4 sets of knee extension at 75% 1RM to task failure...
April 27, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28434749/short-communication-muscle-protein-synthetic-response-to-microparticulated-whey-protein-in-middle-aged-men
#9
C J Mitchell, R F D'Souza, A C Fanning, S D Poppitt, D Cameron-Smith
Whey protein concentrate (WPC) is a high-quality dairy ingredient that is often included in formulated food products designed to stimulate muscle anabolism. Whey protein concentrate can be affected by UHT processing, and its sensory properties are not compatible with some formulated food products. Microparticulated WPC (mWPC) is a novel ingredient that is resistant to heat treatment and has enhanced sensory properties. When 16 healthy middle-aged men consumed 20 g of either WPC or mWPC, both proteins increased plasma essential AA and leucine concentrations with no detectable difference in curve kinetics...
April 20, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28425844/the-role-of-glucose-6-phosphate-dehydrogenase-in-adipose-tissue-inflammation-in-obesity
#10
Yoon Jeong Park, Sung Sik Choe, Jee Hyung Sohn, Jae Bum Kim
Obesity is closely associated with metabolic diseases including type 2 diabetes. One hallmark characteristics of obesity is chronic inflammation that is coordinately controlled by complex signaling networks in adipose tissues. Compelling evidence indicates that reactive oxygen species (ROS) and its related signaling pathways play crucial roles in the progression of chronic inflammation in obesity. The pentose phosphate pathway (PPP) is an anabolic pathway that utilizes the glucoses to generate molecular building blocks and reducing equivalents in the form of NADPH...
February 8, 2017: Adipocyte
https://www.readbyqxmd.com/read/28419987/extracellular-matrix-mediates-bmp-2-in-a-model-of-temporomandibular-joint-osteoarthritis
#11
Maya Shirakura, Vardit Kram, Jennifer Robinson, Sheena Sikka, Tina M Kilts, Sunil Wadhwa, Marian F Young
Temporomandibular joint (TMJ) osteoarthritis (OA) is a complex disease that affects both cartilage and subchondral bone. It is accompanied by loss of extracellular matrix (ECM) and may be controlled by bone morphogenetic protein-2 (BMP-2). We analyzed the effect of BMP-2 in both cartilage and subchondral bone in a TMJ-OA animal model that is deficient in biglycan (Bgn) and fibromodulin (Fmod) (Bgn-/-Fmod-/-). Whole mandibles were dissected from 3-week-old wild-type (WT) and Bgn-/-Fmod-/- mice and incubated with and without 250 µg/mL BMP-2 for 2 days using an explant culture system...
April 19, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28388373/protein-kinetics-and-metabolic-effects-related-to-disease-states-in-the-intensive-care-unit
#12
Robert G Martindale, Daren K Heyland, Saúl J Rugeles, Jan Wernerman, Peter J M Weijs, Jayshil J Patel, Stephen A McClave
Evaluating protein kinetics in the critically ill population remains a very difficult task. Heterogeneity in the intensive care unit (ICU) population and wide spectrum of disease processes creates complexity in assessing protein kinetics. Traditionally, protein has been delivered in the context of total energy. Focus on energy delivery has recently come into question, as the importance of supplemental protein in patient outcomes has been shown in several recent trials. The ICU patient is prone to catabolism, immobilization, and impaired immunity, which is a perfect storm for massive loss of lean body tissue with a unidirectional flow of amino acids from muscle to immune tissue for immunoglobulin production, as well as liver for gluconeogenesis and acute phase protein synthesis...
April 2017: Nutrition in Clinical Practice
https://www.readbyqxmd.com/read/28387447/withdrawn-interventions-for-fatigue-and-weight-loss-in-adults-with-advanced-progressive-illness
#13
REVIEW
Cathy Payne, Philip J Wiffen, Suzanne Martin
BACKGROUND: Fatigue and unintentional weight loss are two of the commonest symptoms experienced by people with advanced progressive illness. Appropriate interventions may bring considerable improvements in function and quality of life to seriously ill people and their families, reducing physical, psychological and spiritual distress. OBJECTIVES: To conduct an overview of the evidence available on the efficacy of interventions used in the management of fatigue and/or unintentional weight loss in adults with advanced progressive illness by reviewing the evidence contained within Cochrane reviews...
April 7, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28379838/influence-of-omega-3-fatty-acids-on-skeletal-muscle-protein-metabolism-and-mitochondrial-bioenergetics-in-older-adults
#14
Antigoni Z Lalia, Surendra Dasari, Matthew M Robinson, Hinnah Abid, Dawn M Morse, Katherine A Klaus, Ian R Lanza
Omega-3 polyunsaturated fatty acids (n3-PUFA) are recognized for their anti-inflammatory effects and may be beneficial in the context of sarcopenia. We determined the influence of n3-PUFA on muscle mitochondrial physiology and protein metabolism in older adults. Twelve young (18-35 years) and older (65-85 years) men and women were studied at baseline. Older adults were studied again following n3-PUFA supplementation (3.9g/day, 16 weeks). Muscle biopsies were used to evaluate respiratory capacity (high resolution respirometry) and oxidant emissions (spectrofluorometry) in isolated mitochondria...
April 2017: Aging
https://www.readbyqxmd.com/read/28377392/effects-of-testosterone-and-evoked-resistance-exercise-after-spinal-cord-injury-terex-sci-study-protocol-for-a-randomised-controlled-trial
#15
Ashraf S Gorgey, Refka E Khalil, Ranjodh Gill, Laura C O'Brien, Timothy Lavis, Teodoro Castillo, David X Cifu, Jeannie Savas, Rehan Khan, Christopher Cardozo, Edward J Lesnefsky, David R Gater, Robert A Adler
INTRODUCTION: Individuals with spinal cord injury (SCI) are at a lifelong risk of obesity and chronic metabolic disorders including insulin resistance and dyslipidemia. Within a few weeks of injury, there is a significant decline in whole body fat-free mass, particularly lower extremity skeletal muscle mass, and subsequent increase in fat mass (FM). This is accompanied by a decrease in anabolic hormones including testosterone. Testosterone replacement therapy (TRT) has been shown to increase skeletal muscle mass and improve metabolic profile...
April 4, 2017: BMJ Open
https://www.readbyqxmd.com/read/28367506/regulation-of-protein-and-mrna-expression-of-the-mtorc1-repressor-redd1-in-response-to-leucine-and-serum
#16
Adam J Black, Bradley S Gordon, Michael D Dennis, Leonard S Jefferson, Scot R Kimball
Expression of the mTORC1 repressor, Regulated in DNA Damage and Development 1 (REDD1), is elevated in skeletal muscle during various catabolic conditions including fasting, hindlimb immobilization, and sepsis. Conversely, REDD1 expression is suppressed by anabolic stimuli such as resistance exercise or nutrient consumption following a fast. Though it is known that nutrient consumption reduces REDD1 expression, it is largely unknown how nutrients and hormones individually contribute to the reduction in REDD1 expression...
December 2016: Biochemistry and Biophysics Reports
https://www.readbyqxmd.com/read/28359098/attenuation-of-resting-but-not-load-mediated-protein-synthesis-in-prostate-cancer-patients-on-androgen-deprivation
#17
Erik D Hanson, André R Nelson, Daniel W D West, John A Violet, Lannie O'Keefe, Stuart M Phillips, Alan Hayes
Context: Androgen deprivation therapy (ADT) is a common prostate cancer (PCa) treatment but results in muscular atrophy. Periodic increases in muscle protein synthesis (MPS) that occur after resistance exercise or protein intake may ameliorate this muscle loss, but the impact of these anabolic stimuli during ADT is unclear. Objective: To determine the acute MPS response to whey protein supplementation with and without resistance exercise during ADT. Design: Acute response in PCa patients vs age-matched controls (CON)...
March 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28351914/the-n-acetylmuramic-acid-6-phosphate-phosphatase-mupp-completes-the-pseudomonas-peptidoglycan-recycling-pathway-leading-to-intrinsic-fosfomycin-resistance
#18
Marina Borisova, Jonathan Gisin, Christoph Mayer
Bacterial cells are encased in and stabilized by a netlike peptidoglycan (PGN) cell wall that undergoes turnover during bacterial growth. PGN turnover fragments are frequently salvaged by the cells via a pathway referred to as PGN recycling. Two different routes for the recycling of the cell wall sugar N-acetylmuramic acid (MurNAc) have been recognized in bacteria. In Escherichia coli and related enterobacteria, as well as in most Gram-positive bacteria, MurNAc is recovered via a catabolic route requiring a MurNAc 6-phosphate etherase (MurQ in E...
March 28, 2017: MBio
https://www.readbyqxmd.com/read/28328712/resistance-training-induced-elevations-in-muscular-strength-in-trained-men-are-maintained-after-2-weeks-of-detraining-and-not-differentially-affected-by-whey-protein-supplementation
#19
Paul S Hwang, Thomas L Andre, Sarah K McKinley-Barnard, Flor E Morales Marroquín, Joshua J Gann, Joon J Song, Darryn S Willoughby
Hwang, PS, Andre, TL, McKinley-Barnard, SK, Morales Marroquín, FE, Gann, JJ, Song, JJ, and Willoughby, DS. Resistance training-induced elevations in muscular strength in trained men are maintained after 2 weeks of detraining and not differentially affected by whey protein supplementation. J Strength Cond Res 31(4): 869-881, 2017-Resistance training (RT) with nutritional strategies incorporating whey protein intake postexercise can stimulate muscle protein synthesis and elicit hypertrophy. The early phases of training-induced anabolic responses can be attenuated with longer-term training...
April 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28301435/different-cluster-sets-result-in-similar-metabolic-endocrine-and-perceptual-responses-in-trained-men
#20
James J Tufano, Jenny A Conlon, Sophia Nimphius, Jonathan M Oliver, Andreas Kreutzer, G Gregory Haff
The purpose of this study was to compare the kinematic, metabolic, endocrine, and perceptual responses of three back squat protocols with equal loads, number of repetitions, and total rest duration. Eight strength-trained men performed 36 back squats using 75% 1RM and 420 s of total rest during basic cluster sets of 4 (CS4), rest-redistribution sets of 4 (RR4), and rest-redistribution sets of 1 (RR1). Ratings of perceived exertion (RPE), blood lactate (La), mean velocity maintenance (MVM), and mean velocity loss (MVL) were measured during exercise...
March 13, 2017: Journal of Strength and Conditioning Research
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