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https://www.readbyqxmd.com/read/28091824/exercise-capacity-physical-activity-and-morbidity
#1
Danielle L Brunjes, Peter J Kennel, P Christian Schulze
Muscle weakness and atrophy are key characteristics of the aging adult but can also be found in chronically ill patients with heart failure, cancer, renal failure, and chronic infectious diseases all associated with an accelerated level of muscle dysfunction. Reduced physical activity levels and exercise intolerance increase muscle loss and decrease quality of life in both the aging and heart failure populations. The purpose of this review is to provide an overview of the effects of aging and heart failure on skeletal muscle function and how exercise training can improve long-term outcomes associated with skeletal muscle dysfunction...
January 16, 2017: Heart Failure Reviews
https://www.readbyqxmd.com/read/28074468/do-changes-in-mitochondrial-quality-contribute-to-increases-in-skeletal-muscle-oxidative-capacity-following-endurance-training
#2
Miles F Bartlett, Julia D Miehm, Liam F Fitzgerald, Chad R Straight
Endurance training improves skeletal muscle oxidative capacity, but the molecular adaptations that drive this process are not fully understood. This article is protected by copyright. All rights reserved.
January 11, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28068193/the-improvement-in-walking-speed-induced-by-resistance-training-is-associated-with-increased-muscular-strength-but-not-skeletal-muscle-mass-in-older-women
#3
Leandro Santos, Alex S Ribeiro, Brad J Schoenfeld, Matheus A Nascimento, Crisieli M Tomeleri, Mariana F Souza, Fábio L C Pina, Edilson S Cyrino
OBJECTIVE: The purpose of the present study was to analyze whether improvements in fast walking speed induced by resistance training (RT) are associated with changes in body composition, muscle quality, and muscular strength in older women. METHODS: Twenty-three healthy older women (69.6 ± 6.4 years, 64.95 ± 12.9 kg, 1.55 ± 0.07 m, 27.06 ± 4.6 kg/m²) performed a RT program for 8 weeks consisting of 8 exercises for the whole body, 3 sets of 10-15 repetitions maximum, 3 times a week...
January 9, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28060301/cryosectioning-of-contiguous-regions-of-a-single-mouse-skeletal-muscle-for-gene-expression-and-histological-analyses
#4
Aaron M Beedle
With this method, consecutive cryosections are collected to enable both microscopy applications for tissue histology and enrichment of RNA for gene expression using adjacent regions from a single mouse skeletal muscle. Typically, it is challenging to achieve adequate homogenization of small skeletal muscle samples because buffer volumes may be too low for efficient grinding applications, yet without sufficient mechanical disruption, the dense tissue architecture of muscle limits penetration of buffer reagents, ultimately causing low RNA yield...
December 12, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28060254/quantitative-magnetic-resonance-imaging-of-skeletal-muscle-disease
#5
Bruce M Damon, Ke Li, Richard D Dortch, E Brian Welch, Jane H Park, Amanda K W Buck, Theodore F Towse, Mark D Does, Daniel F Gochberg, Nathan D Bryant
Quantitative magnetic resonance imaging (qMRI) describes the development and use of MRI to quantify physical, chemical, and/or biological properties of living systems. Neuromuscular diseases often exhibit a temporally varying, spatially heterogeneous, and multi-faceted pathology. The goal of this protocol is to characterize this pathology using qMRI methods. The MRI acquisition protocol begins with localizer images (used to locate the position of the body and tissue of interest within the MRI system), quality control measurements of relevant magnetic field distributions, and structural imaging for general anatomical characterization...
December 18, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28057818/dna-methylation-assessment-from-human-slow-and-fast-twitch-skeletal-muscle-fibers
#6
Gwenaelle Begue, Ulrika Raue, Bozena Jemiolo, Scott W Trappe
A new application of the Reduced Representation Bisulfite Sequencing method was developed using low-DNA input to investigate the epigenetic profile of human slow- and fast-twitch skeletal muscle fibers. Successful library construction was completed with as little as 15 ng of DNA and high quality sequencing data were obtained with 32 ng of DNA. Analysis identified 143,160 differentially methylated CpG-sites across 14,046 genes. In both fiber types, selected genes predominantly expressed in slow or fast fibers were hypomethylated, which was supported by the RNA-Seq analysis...
January 5, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28039397/physical-exercise-in-aging-human-skeletal-muscle-increases-mitochondrial-calcium-uniporter-expression-levels-and-affects-mitochondria-dynamics
#7
Sandra Zampieri, Cristina Mammucari, Vanina Romanello, Laura Barberi, Laura Pietrangelo, Aurora Fusella, Simone Mosole, Gaia Gherardi, Christian Höfer, Stefan Löfler, Nejc Sarabon, Jan Cvecka, Matthias Krenn, Ugo Carraro, Helmut Kern, Feliciano Protasi, Antonio Musarò, Marco Sandri, Rosario Rizzuto
Age-related sarcopenia is characterized by a progressive loss of muscle mass with decline in specific force, having dramatic consequences on mobility and quality of life in seniors. The etiology of sarcopenia is multifactorial and underlying mechanisms are currently not fully elucidated. Physical exercise is known to have beneficial effects on muscle trophism and force production. Alterations of mitochondrial Ca(2+) homeostasis regulated by mitochondrial calcium uniporter (MCU) have been recently shown to affect muscle trophism in vivo in mice...
December 2016: Physiological Reports
https://www.readbyqxmd.com/read/28027907/effect-of-ramadan-fasting-on-fatigue-mood-sleepiness-and-health-related-quality-of-life-of-healthy-young-men-in-summer-time-in-germany-a-prospective-controlled-study
#8
Boya Nugraha, Samaneh Khoshandam Ghashang, Imad Hamdan, Christoph Gutenbrunner
Muslims around the world fast during the lunar month of Ramadan. The month consists of 29 or 30 days, which vary in length depending on geographic location and the time of year. During this month, Muslims abstain from food, drink, smoking, and sex from dawn until sunset. In 2015, Ramadan fell during the summer. As a result, Muslims in Germany fasted 19 h a day. Previous research has shown associations between fasting and mood enhancement. This study aimed to determine the effect of fasting on young, healthy males who fasted in Germany during Ramadan 2015...
December 24, 2016: Appetite
https://www.readbyqxmd.com/read/27979468/sarcopenia-in-emergency-abdominal-surgery
#9
Rebecca C Dirks, Brandy L Edwards, Elizabeth Tong, Basil Schaheen, Florence E Turrentine, Amber Shada, Philip W Smith
BACKGROUND: Sarcopenia, a loss of skeletal muscle mass associated with aging, is a practical measure of frailty and has been previously identified as a predictor of outcomes in surgical cohorts including cancer resection and elderly patients. We hypothesized that sarcopenia, as measured by preoperative computerized tomography (CT) scan, predicts mortality and morbidity in emergent laparotomy. METHODS: Institutional American College of Surgeons National Surgical Quality Improvement Program data were queried for adult patients who underwent open emergency abdominal surgery between 2008 and 2013...
January 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/27933692/preferential-changes-of-skeletal-muscle-echogenicity-in-myotonic-dystrophy-type-1
#10
N Takamatsu, K Sogawa, H Nodera, S Hashiguchi, Y Osaki, M Saito, A Mori, Y Izumi, R Kaji
BACKGROUND AND PURPOSE: In myotonic dystrophy type 1 (DM1), weakness of distal limb muscles affects quality of life. Non-invasive evaluation of muscular involvement by muscle sonography could be useful for characterizing muscle-specific involvement. METHODS: Sonography of the lower leg and forearm was performed in 19 patients with DM1 and 10 control subjects. The mean echo intensities (EIs) of seven limb muscles were obtained by computer-assisted histogram analysis and compared within DM1 according to the overall clinical severity...
December 9, 2016: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/27932876/effectiveness-of-neuromuscular-electrical-stimulation-for-the-rehabilitation-of-moderate-to-severe-copd-a-meta-analysis
#11
Rong-Chang Chen, Xiao-Ying Li, Li-Li Guan, Bing-Peng Guo, Wei-Liang Wu, Zi-Qing Zhou, Ya-Ting Huo, Xin Chen, Lu-Qian Zhou
PURPOSE: Patients with COPD often experience skeletal muscle dysfunction. For those who are unable or unwilling to undertake physical training, neuromuscular electrical stimulation (NMES) may provide an alternative method of rehabilitation. The purpose of this meta-analysis was to investigate the controversial topic of whether this therapy is effective in patients with moderate-to-severe COPD. PATIENTS AND METHODS: We pooled data from nine trials published between January 9, 2002 and January 4, 2016 across PubMed, Embase, Cochrane Central Register of Controlled Trials, Google Scholar, and relevant websites for randomized controlled trials...
2016: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/27926595/impact-of-skeletal-muscle-mass-index-intramuscular-adipose-tissue-content-and-visceral-to-subcutaneous-adipose-tissue-area-ratio-on-early-mortality-of-living-donor-liver-transplantation
#12
Yuhei Hamaguchi, Toshimi Kaido, Shinya Okumura, Atsushi Kobayashi, Hisaya Shirai, Shintaro Yagi, Naoko Kamo, Hideaki Okajima, Shinji Uemoto
BACKGROUND: Skeletal muscle depletion has been shown to be an independent risk factor for poor survival in various diseases. However, in surgery, the significance of other body components including visceral and subcutaneous adipose tissue remains unclear. METHODS: This retrospective study included 250 adult patients undergoing living donor liver transplantation (LDLT) between January 2008 and April 2015. Using preoperative plain CT imaging at the third lumbar vertebra level, skeletal muscle mass, muscle quality, and visceral adiposity were evaluated by the skeletal muscle mass index (SMI), intramuscular adipose tissue content (IMAC), and visceral to subcutaneous adipose tissue area ratio (VSR), respectively...
December 6, 2016: Transplantation
https://www.readbyqxmd.com/read/27924614/gdf11-treatment-attenuates-the-recovery-of-skeletal-muscle-function-after-injury-in-older-rats
#13
Yu Zhou, Neel Sharma, David Dukes, Maria B Myzithras, Priyanka Gupta, Ashraf Khalil, Julius Kahn, Jennifer S Ahlberg, David B Hayes, Michael Franti, Tracy Criswell
Loss of skeletal muscle mass and function results in loss of mobility for elderly patients. Novel therapies that can protect and/or restore muscle function during aging would have profound effects on the quality of life for this population. Growth differentiation factor 11 (GDF11) has been proposed as a "youthful" circulating factor that can restore cardiac, neural, and skeletal muscle functions in aging animals. However, conflicting data has been recently published that casts doubt on these assertions. We used a complex rat model of skeletal muscle injury that physiologically mimics injuries seen in patients; to investigate the ability of GDF11 and to enhance skeletal muscle regeneration after injury in older rats...
December 6, 2016: AAPS Journal
https://www.readbyqxmd.com/read/27923623/staged-total-knee-arthroplasty-for-bilateral-complex-knee-deformities-from-kashin-beck-disease-and-skeletal-dysplasia
#14
Ming Ling, Xueyuan Wu, Yanhai Chang, Xianghui Dong, Zhengming Sun, Li Ling, Shixun Wu, Bo Yang
This study reported two cases of patients with Grade III Kashin-Beck disease (KBD) with skeletal dysplasia concomitant with complex knee deformity and functional limitation treated by staged total knee arthroplasty (TKA). Detailed pre-operative planning, bone resection, and soft tissue balancing in affected knees were performed in the surgeries in this report. The results demonstrated that TKA could correct lower limb alignment, alleviate knee pain, improve function, and provide good quality of life in people with KBD...
December 3, 2016: Knee
https://www.readbyqxmd.com/read/27919820/tnf-%C3%AE-and-cancer-cachexia-molecular-insights-and-clinical-implications
#15
REVIEW
Hetal J Patel, Bhoomika M Patel
Cancer cachexia characterized by a chronic wasting syndrome, involves skeletal muscle loss and adipose tissue loss and resistance to conventional nutritional support. Cachexia is responsible for the reduction in quality and length of life of cancer patients. It also decreases the muscle strength of the patients. The pro-inflammatory and pro-cachectic factors produced by the tumor cells have important role in genesis of cachexia. A number of pro-inflammatory cytokines, like interleukin-1 (IL-1), IL-6, tumor necrosis factor- alpha (TNF-α) may have important role in the pathological mechanisms of cachexia in cancer...
December 2, 2016: Life Sciences
https://www.readbyqxmd.com/read/27918964/sarcopenia-in-older-mice-is-characterized-by-a-decreased-anabolic-response-to-a-protein-meal
#16
Miriam van Dijk, Jolanda Nagel, Francina J Dijk, Jerôme Salles, Sjors Verlaan, Stephane Walrand, Klaske van Norren, Yvette Luiking
Ageing is associated with sarcopenia, a progressive decline of skeletal muscle mass, muscle quality and muscle function. Reduced sensitivity of older muscles to respond to anabolic stimuli, i.e. anabolic resistance, is part of the underlying mechanisms. Although, muscle parameters have been studied in mice of various ages/strains; the aim was to study if mice display similar deteriorating processes as human ageing. Therefore, 10,16,21 and 25 months-old C57BL6/6J male mice were studied to measure parameters of sarcopenia and factors contributing to its pathophysiology, with the aim of characterizing sarcopenia in old mice...
March 2017: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/27916783/reduction-of-visceral-fat-by-liraglutide-is-associated-with-ameliorations-of-hepatic-steatosis-albuminuria-and-micro-inflammation-in-type-2-diabetic-patients-with-insulin-treatment-a-randomized-control-trial
#17
Ryotaro Bouchi, Yujiro Nakano, Tatsuya Fukuda, Takato Takeuchi, Masanori Murakami, Isao Minami, Hajime Izumiyama, Koshi Hashimoto, Takanobu Yoshimoto, Yoshihiro Ogawa
Liraglutide, an analogue of human glucagon-like peptide 1, reduces cardiovascular events in patients with type 2 diabetes; however, it has still been unknown by which mechanisms liraglutide could reduce cardiovascular events. Type 2 diabetic patients with insulin treatment were enrolled in this randomized, open-label, comparative study. Participants were randomly assigned to liraglutide plus insulin (liraglutide group) and insulin treatment (control group) at 1:1 allocation. Primary endpoint was the change in viscera fat are (VFA, cm(2)) at 24 weeks...
December 3, 2016: Endocrine Journal
https://www.readbyqxmd.com/read/27906072/actrii-blockade-protects-mice-from-cancer-cachexia-and-prolongs-survival-in-the-presence-of-anti-cancer-treatments
#18
Shinji Hatakeyama, Serge Summermatter, Marie Jourdain, Stefan Melly, Giulia C Minetti, Estelle Lach-Trifilieff
BACKGROUND: Cachexia affects the majority of patients with advanced cancer and is associated with reduced treatment tolerance, response to therapy, quality of life, and life expectancy. Cachectic patients with advanced cancer often receive anti-cancer therapies against their specific cancer type as a standard of care, and whether specific ActRII inhibition is efficacious when combined with anti-cancer agents has not been elucidated yet. METHODS: In this study, we evaluated interactions between ActRII blockade and anti-cancer agents in CT-26 mouse colon cancer-induced cachexia model...
July 26, 2016: Skeletal Muscle
https://www.readbyqxmd.com/read/27903267/skeletal-muscle-quality-as-assessed-by-ct-derived-skeletal-muscle-density-is-associated-with-6-month-mortality-in-mechanically-ventilated-critically-ill-patients
#19
Wilhelmus G P M Looijaard, Ingeborg M Dekker, Sandra N Stapel, Armand R J Girbes, Jos W R Twisk, Heleen M Oudemans-van Straaten, Peter J M Weijs
BACKGROUND: Muscle quantity at intensive care unit (ICU) admission has been independently associated with mortality. In addition to quantity, muscle quality may be important for survival. Muscle quality is influenced by fatty infiltration or myosteatosis, which can be assessed on computed tomography (CT) scans by analysing skeletal muscle density (SMD) and the amount of intermuscular adipose tissue (IMAT). We investigated whether CT-derived low skeletal muscle quality at ICU admission is independently associated with 6-month mortality and other clinical outcomes...
December 1, 2016: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/27898947/study-of-bovine-gene-the-temporal-spatial-expression-patterns-polymorphism-and-association-analysis-with-meat-production-traits
#20
E Juszczuk-Kubiak, K Bujko, M Grześ, M Cymer, K Wicińska, A Szostak, M Pierzchała
The gene () encodes a transcription factor belonging to the MEF2 family that plays an important role in myogenesis by transcriptional regulation of genes involved in skeletal muscle growth and development. Despite the established importance of the factors in the muscular growth and development, the temporal-spatial expression and biological function of have not been reported in cattle. The aim of this study was to analyze the level of expression in the developing longissimus dorsi muscle (LM) of 4 cattle breeds (Polish Holstein-Friesian [HF], Limousine [LIM], Hereford [HER], Polish Red [PR]), differing in terms of meat production and utility type, at 6, 9, and 12 mo of age...
November 2016: Journal of Animal Science
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