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https://www.readbyqxmd.com/read/28730657/higher-levels-of-cardiorespiratory-fitness-keep-liver-mitochondria-happy
#1
Daniel J Cuthbertson, Kelly Bowden Davies
The concept that regular physical activity (PA) and exercise training promotes mitochondrial biogenesis in skeletal muscle, enhancing mitochondrial quality and quantity and in doing so increasing oxidative phosphorylation capacity, has been well established for almost 50 years. This article is protected by copyright. All rights reserved.
July 21, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28726981/triennial-growth-and-development-symposium-factors-influencing-bovine-intramuscular-adipose-tissue-development-and-cellularity
#2
E Albrecht, L Schering, Y Liu, K Komolka, C Kühn, K Wimmers, T Gotoh, S Maak
Appearance, distribution, and amount of intramuscular fat (IMF), often referred to as marbling, are highly variable and depend on environmental and genetic factors. On the molecular level, the concerted action of several drivers, including hormones, receptors, transcription factors, etc., determines where clusters of adipocytes arise. Therefore, the aim of future studies remains to identify such factors as biological markers of IMF to increase the ability to identify animals that deposit IMF early in age to increase efficiency of high-quality meat production...
May 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28715394/a-filtration-based-method-of-preparing-high-quality-nuclei-from-cross-linked-skeletal-muscle-for-chromatin-immunoprecipitation
#3
Kazunari Nohara, Zheng Chen, Seung-Hee Yoo
Chromatin immunoprecipitation (ChIP) is a powerful method to determine protein binding to chromatin DNA. Fiber-rich skeletal muscle, however, has been a challenge for ChIP due to technical difficulty in isolation of high-quality nuclei with minimal contamination of myofibrils. Previous protocols have attempted to purify nuclei before cross-linking, which incurs the risk of altered DNA-protein interaction during the prolonged nuclei preparation process. In the current protocol, we first cross-linked the skeletal muscle tissue collected from mice, and the tissues were minced and sonicated...
July 6, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28713914/systematic-identification-of-human-housekeeping-genes-possibly-useful-as-references-in-gene-expression-studies
#4
Maria Caracausi, Allison Piovesan, Francesca Antonaros, Pierluigi Strippoli, Lorenza Vitale, Maria Chiara Pelleri
The ideal reference, or control, gene for the study of gene expression in a given organism should be expressed at a medium‑high level for easy detection, should be expressed at a constant/stable level throughout different cell types and within the same cell type undergoing different treatments, and should maintain these features through as many different tissues of the organism. From a biological point of view, these theoretical requirements of an ideal reference gene appear to be best suited to housekeeping (HK) genes...
September 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28712655/insulin-regulation-of-proteostasis-and-clinical-implications
#5
REVIEW
Haleigh A James, Brian T O'Neill, K Sreekumaran Nair
Maintenance and modification of the cellular proteome are at the core of normal cellular physiology. Although insulin is well known for its control of glucose homeostasis, its critical role in maintaining proteome homeostasis (proteostasis) is less appreciated. Insulin signaling regulates protein synthesis and degradation as well as posttranslational modifications at the tissue level and coordinates proteostasis at the organism level. Here, we review regulation of proteostasis by insulin in postabsorptive, postprandial, and diabetic states...
July 10, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28702326/rev-erb-co-regulates-muscle-regeneration-via-tethered-interaction-with-the-nf-y-cistrome
#6
Ryan D Welch, Chun Guo, Monideepa Sengupta, Katherine J Carpenter, Natalie A Stephens, Stacy A Arnett, Marvin J Meyers, Lauren M Sparks, Steven R Smith, Jinsong Zhang, Thomas P Burris, Colin A Flaveny
OBJECTIVE: The loss of skeletal muscle mass and strength are a central feature of traumatic injury and degenerative myopathies. Unfortunately, pharmacological interventions typically fail to stem the long-term decline in quality of life. Reduced Rev-Erb-mediated gene suppression in cultured C2C12 myoblasts has been shown to stimulate myoblast differentiation. Yet the mechanisms that allow Rev-Erb to pleiotropically inhibit muscle differentiation are not well understood. In this study, we sought to elucidate the role of Rev-Erb in the regulation of muscle differentiation and regeneration in vivo...
July 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28698349/a-pilot-randomised-controlled-trial-of-a-periodised-resistance-training-and-protein-supplementation-intervention-in-prostate-cancer-survivors-on-androgen-deprivation-therapy
#7
Jacqueline L Kiwata, Tanya B Dorff, E Todd Schroeder, George J Salem, Christianne J Lane, Judd C Rice, Mitchell E Gross, Christina M Dieli-Conwright
INTRODUCTION: Prostate cancer survivors (PCS) receiving androgen deprivation therapy (ADT) experience deleterious side effects such as unfavourable changes in cardiometabolic factors that lead to sarcopenic obesity and metabolic syndrome (MetS). While loss of lean body mass (LBM) compromises muscular strength and quality of life, MetS increases the risk of cardiovascular disease and may influence cancer recurrence. Exercise can improve LBM and strength, and may serve as an alternative to the pharmacological management of MetS in PCS on ADT...
July 10, 2017: BMJ Open
https://www.readbyqxmd.com/read/28695558/rehabilitation-in-patients-with-pulmonary-arterial-hypertension
#8
Stephan Keusch, Alexander Turk, Stéphanie Saxer, Nicola Ehlken, Ekkehard Grunig, Silvia Ulrich, On Behalf Of The Swiss Society Of Pulmonary Hypertension
Exertional dyspnoea is a leading symptom in patients with pulmonary arterial hypertension (PAH). Patients suffering from PAH report poor quality of life, have skeletal muscle dysfunction and in the absence of advanced medical therapy deteriorate progressively due to right heart failure which can lead to death. For decades, patients with PAH were advised to avoid exercise in fear of exacerbated right heart failure. Recently, it has been shown that a highly supervised rehabilitation programme in expert centres leads to significant improvements in symptoms, quality of life, exercise capacity and may even enhance haemodynamics in selected stable patients treated with advanced regimens of PAH-targeted drugs...
July 11, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28688452/crossroads-between-peripheral-atherosclerosis-western-type-diet-and-skeletal-muscle-pathophysiology-emphasis-on-apolipoprotein-e-deficiency-and-peripheral-arterial-disease
#9
REVIEW
Peggy Sfyri, Antonios Matsakas
Atherosclerosis is a chronic inflammatory process that, in the presence of hyperlipidaemia, promotes the formation of atheromatous plaques in large vessels of the cardiovascular system. It also affects peripheral arteries with major implications for a number of other non-vascular tissues such as the skeletal muscle, the liver and the kidney. The aim of this review is to critically discuss and assimilate current knowledge on the impact of peripheral atherosclerosis and its implications on skeletal muscle homeostasis...
July 8, 2017: Journal of Biomedical Science
https://www.readbyqxmd.com/read/28678599/benefits-of-physical-activities-centered-on-the-trunk-for-pregnant-women
#10
Eric Watelain, Antonio Pinti, Racha Doya, Cyril Garnier, Hechmi Toumi, Samuel Boudet
OBJECTIVE: To examine the effect of a trunk exercise program on pain, quality of life (QoL) and physical health (PH) in the late pregnancy and post-partum periods as well as baby weight and size and delivery. METHODS: 90 nulliparous women were allocated based on voluntarism to a training group (TG) or to a control group (CG). TG carried out a structured program with exercises for flexibility, balance and strengthening for the majority of skeletal muscles specifically for the spinal ones, between the 24th and 36th week of pregnancy...
July 5, 2017: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/28676289/differential-characteristics-of-skeletal-muscle-in-community-dwelling-older-adults
#11
Minoru Yamada, Yosuke Kimura, Daisuke Ishiyama, Naohito Nishio, Yuki Abe, Tomohiro Kakehi, Junko Fujimoto, Tomoya Tanaka, Shunsuke Ohji, Yuhei Otobe, Shingo Koyama, Yukiko Okajima, Hidenori Arai
BACKGROUND: Sarcopenia is diagnosed on the basis of skeletal muscle mass and muscle strength/function. However, more simple and accurate measures for muscle mass and muscle strength/function should be explored. OBJECTIVE: The aim of this study was to compare the skeletal muscle characteristics at each stage of sarcopenia (normal, presarcopenia, dynapenia, and sarcopenia) via ultrasonography, multifrequency bioelectrical impedance analysis (BIA), and physical assessment batteries in community-dwelling older adults...
July 1, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28669118/quantifying-fat-replacement-of-muscle-by-quantitative-mri-in-muscular-dystrophy
#12
REVIEW
Jedrzej Burakiewicz, Christopher D J Sinclair, Dirk Fischer, Glenn A Walter, Hermien E Kan, Kieren G Hollingsworth
The muscular dystrophies are rare orphan diseases, characterized by progressive muscle weakness: the most common and well known is Duchenne muscular dystrophy which affects young boys and progresses quickly during childhood. However, over 70 distinct variants have been identified to date, with different rates of progression, implications for morbidity, mortality, and quality of life. There are presently no curative therapies for these diseases, but a range of potential therapies are presently reaching the stage of multi-centre, multi-national first-in-man clinical trials...
July 1, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28666853/recombinant-bovine-growth-hormone-rbgh-enhances-somatic-growth-by-regulating-the-gh-igf-axis-in-fingerlings-of-gilthead-sea-bream-sparus-aurata
#13
Emilio J Vélez, Miquel Perelló, Sheida Azizi, Alberto Moya, Esmail Lutfi, Jaume Pérez-Sánchez, Josep A Calduch-Giner, Isabel Navarro, Josefina Blasco, Jaume Fernández-Borràs, Encarnación Capilla, Joaquim Gutiérrez
The growth hormone (GH)/insulin-like growth factors (IGFs) endocrine axis is the main growth-regulator system in vertebrates. Some authors have demonstrated the positive effects on growth of a sustained-release formulation of a recombinant bovine GH (rBGH) in different fish species. The aim of this work was to characterize the effects of a single injection of rBGH in fingerlings of gilthead sea bream on growth, GH-IGF axis, and both myogenic and osteogenic processes. Thus, body weight and specific growth rate were significantly increased in rBGH-treated fish respect to control fish at 6weeks post-injection, whereas the hepatosomatic index was decreased and the condition factor and mesenteric fat index were unchanged, altogether indicating enhanced somatic growth...
June 27, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28663919/photothermal-imaging-of-skeletal-muscle-mitochondria
#14
Toru Tomimatsu, Jun Miyazaki, Yutaka Kano, Takayoshi Kobayashi
The morphology and topology of mitochondria provide useful information about the physiological function of skeletal muscle. Previous studies of skeletal muscle mitochondria are based on observation with transmission, scanning electron microscopy or fluorescence microscopy. In contrast, photothermal (PT) microscopy has advantages over the above commonly used microscopic techniques because of no requirement for complex sample preparation by fixation or fluorescent-dye staining. Here, we employed the PT technique using a simple diode laser to visualize skeletal muscle mitochondria in unstained and stained tissues...
June 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28660306/shear-wave-velocity-measurement-of-upper-trapezius-muscle-by-color-doppler-shear-wave-imaging
#15
Atsushi Yamamoto, Yoshiki Yamakoshi, Takashi Ohsawa, Hitoshi Shitara, Tsuyoshi Ichinose, Hiroyuki Shiozawa, Tsuyoshi Sasaki, Noritaka Hamano, Yasushi Yuminaka, Kenji Takagishi
PURPOSE: Skeletal muscle stiffness is thought to be the result of increased tissue hardness, but measurement accuracy has been dependent on operator technique. We have proposed a novel shear wave real-time imaging method (color Doppler shear wave imaging: CD SWI) with continuous shear waves excited from the tissue surface by a mechanical vibrator. METHODS: Using the method, shear wave velocity was measured for the upper trapezius muscle. Adaptive shear wave velocity measurement by means of quality estimation of shear wave wavefront was adopted...
June 28, 2017: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/28659746/effects-of-baked-and-raw-salmon-fillet-on-lipids-and-n-3-pufas-in-serum-and-tissues-in-zucker-fa-fa-rats%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2
#16
Linn A Vikøren, Aslaug Drotningsvik, Marthe T Bergseth, Svein A Mjøs, Nazanin Mola, Sabine Leh, Gunnar Mellgren, Oddrun A Gudbrandsen
Knowledge of the health impact of consuming heat-treated versus raw fish fillet is limited. To investigate effects of baked or raw salmon fillet intake on lipids and n-3 PUFAs in serum and tissues, obese Zucker fa/fa rats were fed diets containing 25% of protein from baked or raw salmon fillet and 75% of protein from casein, or casein as the sole protein source (control group) for four weeks. Salmon diets had similar composition of amino and fatty acids. Growth and energy intake were similar in all groups. Amounts of lipids and n-3 PUFAs in serum, liver and skeletal muscle were similar between rats fed baked or raw salmon fillet...
2017: Food & Nutrition Research
https://www.readbyqxmd.com/read/28656072/impact-of-aging-and-exercise-on-mitochondrial-quality-control-in-skeletal-muscle
#17
REVIEW
Yuho Kim, Matthew Triolo, David A Hood
Mitochondria are characterized by its pivotal roles in managing energy production, reactive oxygen species, and calcium, whose aging-related structural and functional deteriorations are observed in aging muscle. Although it is still unclear how aging alters mitochondrial quality and quantity in skeletal muscle, dysregulation of mitochondrial biogenesis and dynamic controls has been suggested as key players for that. In this paper, we summarize current understandings on how aging regulates muscle mitochondrial biogenesis, while focusing on transcriptional regulations including PGC-1α, AMPK, p53, mtDNA, and Tfam...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28645718/optimizing-adjuvants-for-intradermal-delivery-of-menc-glycoconjugate-vaccine
#18
Agnese Donadei, Cristiana Balocchi, Maria R Romano, Luigi Panza, Roberto Adamo, Francesco Berti, Derek T O'Hagan, Simona Gallorini, Barbara C Baudner
Intradermal vaccine delivery is a promising alternative to the conventional intramuscular route. The skin layer is immunologically supported by a densely network of antigen presenting cells, while the skeletal muscle is loaded with a relatively sparse population of APCs. Nevertheless, the vaccine to be suitable for intradermal delivery needs a new formulation to facilitate either smaller injection volumes or the introduction into new delivery devises as micro-needles. This study presents a proof of concept for intradermal delivery of the MenC-CRM197 glycoconjugate vaccine using a mouse model...
July 13, 2017: Vaccine
https://www.readbyqxmd.com/read/28642828/surgical-orthodontic-treatment-of-a-patient-affected-by-type-1-myotonic-dystrophy-steinert-syndrome
#19
Laura Cacucci, Beatrice Ricci, Maria Moretti, Giulio Gasparini, Sandro Pelo, Cristina Grippaudo
Myotonic dystrophy, or Steinert's disease, is the most common form of muscular dystrophy that occurs in adults. This multisystemic form involves the skeletal muscles but affects also the eye, the endocrine system, the central nervous system, and the cardiac system. The weakness of the facial muscles causes a characteristic facial appearance frequently associated with malocclusions. Young people with myotonic dystrophy, who also have severe malocclusions, have bad oral functions such as chewing, breathing, and phonation...
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/28639432/muscle-mass-as-a-target-to-reduce-fatigue-in-patients-with-advanced-cancer
#20
Elisabeth C W Neefjes, Renske M van den Hurk, Susanne Blauwhoff-Buskermolen, Maurice J D L van der Vorst, Annemarie Becker-Commissaris, Marian A E de van der Schueren, Laurien M Buffart, Henk M W Verheul
BACKGROUND: Cancer-related fatigue (CRF) reduces quality of life and the activity level of patients with cancer. Cancer related fatigue can be reduced by exercise interventions that may concurrently increase muscle mass. We hypothesized that low muscle mass is directly related to higher CRF. METHODS: A total of 233 patients with advanced cancer starting palliative chemotherapy for lung, colorectal, breast, or prostate cancer were studied. The skeletal muscle index (SMI) was calculated as the patient's muscle mass on level L3 or T4 of a computed tomography scan, adjusted for height...
June 21, 2017: Journal of Cachexia, Sarcopenia and Muscle
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