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https://www.readbyqxmd.com/read/28726981/triennial-growth-and-development-symposium-factors-influencing-bovine-intramuscular-adipose-tissue-development-and-cellularity
#1
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/28724742/the-myokine-irisin-is-released-in-response-to-saturated-fatty-acids-and-promotes-pancreatic-beta-cell-survival-and-insulin-secretion
#2
Annalisa Natalicchio, Nicola Marrano, Giuseppina Biondi, Rosaria Spagnuolo, Rossella Labarbuta, Immacolata Porreca, Angelo Cignarelli, Marco Bugliani, Piero Marchetti, Sebastio Perrini, Luigi Laviola, Francesco Giorgino
This study explored the role of irisin as a new pancreatic beta-cell secretagogue and survival factor and its potential role in the communication between skeletal muscle and pancreatic beta-cells under lipotoxic conditions. Recombinant irisin stimulated insulin biosynthesis and glucose-stimulated insulin secretion (GSIS) in a PKA-dependent manner, and prevented saturated fatty acid-induced apoptosis in human and rat pancreatic beta-cells, as well as in human and murine pancreatic islets, via AKT/BCL2 signaling...
July 19, 2017: Diabetes
https://www.readbyqxmd.com/read/28721439/effects-of-insulin-and-exercise-training-on-fgf21-its-receptors-and-target-genes-in-obesity-and-type-2-diabetes
#3
Rikke Kruse, Sara G Vienberg, Birgitte F Vind, Birgitte Andersen, Kurt Højlund
AIMS/HYPOTHESIS: Pharmacological doses of FGF21 improve glucose tolerance, lipid metabolism and energy expenditure in rodents. Induced expression and secretion of FGF21 from muscle may increase browning of white adipose tissue (WAT) in a myokine-like manner. Recent studies have reported that insulin and exercise increase FGF21 in plasma. Obesity and type 2 diabetes are potentially FGF21-resistant states, but to what extent FGF21 responses to insulin and exercise training are preserved, and whether FGF21, its receptors and target genes are altered, remains to be established...
July 18, 2017: Diabetologia
https://www.readbyqxmd.com/read/28718417/exercise-and-the-hallmarks-of-cancer
#4
REVIEW
Ana Ruiz-Casado, Asunción Martín-Ruiz, Laura M Pérez, Mariano Provencio, Carmen Fiuza-Luces, Alejandro Lucia
A wealth of evidence supports an association between regular physical activity (PA) and decreased risk for cancer and cancer mortality. This is clearly an important issue given the growing worldwide incidence of both cancer and physical inactivity. Of further importance is unraveling the biological mechanisms that explain the potential preventive effects of PA against the development of cancer, as this might improve our understanding of cancer biology and assist researchers exploring novel treatment strategies...
June 2017: Trends in Cancer
https://www.readbyqxmd.com/read/28687176/the-impact-of-a-single-bout-of-high-intensity-circuit-training-on-myokines-concentrations-and-cognitive-functions-in-women-of-different-age
#5
A Gmiat, K Micielska, M Kozłowska, D J Flis, M Smaruj, S Kujach, J Jaworska, P Lipińska, E Ziemann
The study aimed to assess effect of a single bout of high-intensity circuit training (HICT) on myokines concentration: interleukin-6 and irisin, inteleukin-10, brain-derived neurotrophic factor (BDNF), heat shock proteins (HSP27, HSP70) and cognitive functions among women participated in HICT. It also attempted evaluating whether vitamin D could have modified the effect of HICT. Fourteen healthy, non-active women participating in the experiment were assigned to a young or middle-aged group. They performed a single session HICT using body weight as a resistance, based on the ACSM recommendations...
July 5, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28669758/muscle-directs-diurnal-energy-homeostasis-through-a-myokine-dependent-hormone-module-in-drosophila
#6
Xiao Zhao, Jason Karpac
Inter-tissue communication is critical to control organismal energy homeostasis in response to temporal changes in feeding and activity or external challenges. Muscle is emerging as a key mediator of this homeostatic control through consumption of lipids, carbohydrates, and amino acids, as well as governing systemic signaling networks. However, it remains less clear how energy substrate usage tissues, such as muscle, communicate with energy substrate storage tissues in order to adapt with diurnal changes in energy supply and demand...
July 10, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28666854/small-interfering-rna-mediated-knockdown-of-irisin-suppresses-food-intake-and-modulates-appetite-regulatory-peptides-in-zebrafish
#7
Lakshminarasimhan Sundarrajan, Suraj Unniappan
Irisin is a myokine encoded in fibronectin type III domain containing 5 (FNDC5). FNDC5 forms an integral part of the muscle post-exercise, and causes an increase in energy expenditure in mammals. Irisin is abundantly expressed in cardiac and skeletal muscles and is secreted upon activation of peroxisome proliferator-activated receptor gamma coactivator-1 (PGC-1 alpha). Irisin regulates feeding behaviour and cardiovascular function in mammals. More recently, irisin has gained importance as a potential biomarker for myocardial infarction due to its abundance in cardiac muscle...
June 27, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28614774/new-insight-into-the-direct-anti-inflammatory-activity-of-a-myokine-irisin-against-proinflammatory-activation-of-adipocytes-implication-for-exercise-in-obesity
#8
A I Mazur-Bialy, J Bilski, E Pochec, T Brzozowski
A biological activity of myokine irisin, has been intensively investigated in the context of a browning process occurring in white adipose tissue, but its role as a modulator of immune response has been little studied. The aim of our study was to determine the impact of irisin (0 - 100 nM) on pro-inflammatory activation of adipocyte 3T3 L1 cell line. Irisin reduced in a concentration-dependent manner the expression and activity of major proinflammatory cytokines, e.g. tumor necrosis factor-alpha (TNF-α) and interleukin 6 (IL-6) expression and their secretion into cell medium...
April 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28605657/muscle-as-a-paracrine-and-endocrine-organ
#9
REVIEW
Jimena Giudice, Joan M Taylor
Skeletal muscle cells are highly abundant and metabolically active and are known to 'communicate' their energy demands to other organs through active secretion. Muscle-derived secretory proteins include a variety of cytokines and peptides collectively referred to as 'myokines' that exert autocrine, paracrine or endocrine effects. Analyses of the skeletal muscle secretome revealed that numerous myokines are secreted in response to contraction or strength training, and that these factors not only regulate energy demand but also contribute to the broad beneficial effects of exercise on cardiovascular, metabolic, and mental health...
June 9, 2017: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/28595527/creatine-supplementation-and-skeletal-muscle-metabolism-for-building-muscle-mass-review-of-the-potential-mechanisms-of-action
#10
Farnaz Farshidfar, Mark A Pinder, Semone B Myrie
Creatine, a very popular supplement among athletic populations, is of growing interest for clinical applications. Since over 90% of creatine is stored in skeletal muscle, the effect of creatine supplementation on muscle metabolism is a widely studied area. While numerous studies over the past few decades have shown that creatine supplementation has many favorable effects on skeletal muscle physiology and metabolism, including enhancing muscle mass (growth/hypertrophy); the underlying mechanisms are poorly understood...
June 5, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28588307/irisin-prevents-and-restores-bone-loss-and-muscle-atrophy-in-hind-limb-suspended-mice
#11
Graziana Colaianni, Teresa Mongelli, Concetta Cuscito, Paolo Pignataro, Luciana Lippo, Giovanna Spiro, Angela Notarnicola, Ilenia Severi, Giovanni Passeri, Giorgio Mori, Giacomina Brunetti, Biagio Moretti, Umberto Tarantino, Silvia C Colucci, Janne E Reseland, Roberto Vettor, Saverio Cinti, Maria Grano
We previously showed that Irisin, a myokine released from skeletal muscle after physical exercise, plays a central role in the control of bone mass. Here we report that treatment with recombinant Irisin prevented bone loss in hind-limb suspended mice when administered during suspension (preventive protocol) and induced recovery of bone mass when mice were injected after bone loss due to a suspension period of 4 weeks (curative protocol). MicroCT analysis of femurs showed that r-Irisin preserved both cortical and trabecular bone mineral density, and prevented a dramatic decrease of the trabecular bone volume fraction...
June 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28577104/level-of-interleukins-il-6-and-il-15-in-blood-plasma-of-mice-after-forced-swimming-test
#12
L V Kapilevich, T A Kironenko, A N Zakharova, A V Kabachkova, S N Orlov
We measured the concentrations of IL-6 and IL-15 in blood plasma of mice at different terms after forced swimming, taking into account exercise intensity and preliminary training. It was shown that training was an important factor affecting blood plasma level of IL both at rest and after single forced swimming: in trained animals, the concentration of both myokines increased immediately after swimming, while in untrained animals, this increase was observed only after 5 h. Changes in cytokine production against the background of training can be associated with various factors, including neuroendocrine mechanisms, stress, modification of intracellular signaling, as well as reorganization of transcriptional mechanisms in muscle fibers...
June 3, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28571132/cardiovascular-response-and-serum-interleukin-6-level-in-concentric-vs-eccentric-exercise
#13
Mayank Agarwal, Shraddha Singh, Jagdish Narayan, Shivani Pandey, Sunita Tiwari, Priyanka Sharma
INTRODUCTION: Cardiovascular Disease (CVD) is a leading cause of morbidity and mortality in India. Resistance exercise is strongly recommended for implementation in CVD prevention programs. Dynamic resistance exercise comprises of concentric (muscle shortening) and eccentric (muscle lengthening) phase. The contraction of skeletal muscle promotes the synthesis and secretion of cytokines and peptides from myocytes, known as 'myokines'. Interleukin-6 (IL-6) is the first myokine to be released in the blood in response to exercise...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28512448/the-potential-role-of-contraction-induced-myokines-in-the-regulation-of-metabolic-function-for-the-prevention-and-treatment-of-type-2-diabetes
#14
REVIEW
Brian P Carson
Skeletal muscle represents the largest organ in the body, comprises 36-42% of body weight, and has recently been recognized as having an endocrine function. Proteins expressed and released by muscle that have autocrine, paracrine, and endocrine bioactivities have been termed myokines. It is likely that muscle contraction represents the primary stimulus for the synthesis and secretion of myokines to enable communication with other organs such as the liver, adipose tissue, brain, and auto-regulation of muscle metabolism...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28512447/low-dose-pulsatile-interleukin-6-as-a-treatment-option-for-diabetic-peripheral-neuropathy
#15
REVIEW
April Ann Cox, Yves Sagot, Gael Hedou, Christina Grek, Travis Wilkes, Aaron I Vinik, Gautam Ghatnekar
Diabetic peripheral neuropathy (DPN) remains one of the most common and serious complications of diabetes. Currently, pharmacological agents are limited to treating the pain associated with DPN, and do not address the underlying pathological mechanisms driving nerve damage, thus leaving a significant unmet medical need. Interestingly, research conducted using exercise as a treatment for DPN has revealed interleukin-6 (IL-6) signaling to be associated with many positive benefits such as enhanced blood flow and lipid metabolism, decreased chronic inflammation, and peripheral nerve fiber regeneration...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28512432/whole-body-cryotherapy-in-athletes-from-therapy-to-stimulation-an-updated-review-of-the-literature
#16
REVIEW
Giovanni Lombardi, Ewa Ziemann, Giuseppe Banfi
Nowadays, whole-body cryotherapy is a medical physical treatment widely used in sports medicine. Recovery from injuries (e.g., trauma, overuse) and after-season recovery are the main purposes for application. However, the most recent studies confirmed the anti-inflammatory, anti-analgesic, and anti-oxidant effects of this therapy by highlighting the underlying physiological responses. In addition to its therapeutic effects, whole-body cryotherapy has been demonstrated to be a preventive strategy against the deleterious effects of exercise-induced inflammation and soreness...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28507197/muscle-adipose-tissue-cross-talk
#17
Kristin I Stanford, Laurie J Goodyear
Exercise training results in adaptations to both skeletal muscle and white adipose tissue (WAT) and protects against metabolic disorders including obesity and type 2 diabetes. Exercise-induced adaptations include an altered profile of secreted proteins, both myokines (from skeletal muscle) and adipokines (from adipose tissue). These secreted proteins may act in an endocrine manner to facilitate tissue-to-tissue communication and "cross talk," likely working together to improve overall metabolic health. Some studies suggest that contracting skeletal muscles release myokines that may function to alter the phenotype of WAT, including WAT "beiging," in which there is increased expression of beige marker genes and increased presence of multilocular cells within the WAT...
May 15, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28495803/on-the-run-for-hippocampal-plasticity
#18
C'iana Cooper, Hyo Youl Moon, Henriette van Praag
Accumulating research in rodents and humans indicates that exercise benefits brain function and may prevent or delay onset of neurodegenerative conditions. In particular, exercise modifies the structure and function of the hippocampus, a brain area important for learning and memory. This review addresses the central and peripheral mechanisms underlying the beneficial effects of exercise on the hippocampus. We focus on running-induced changes in adult hippocampal neurogenesis, neural circuitry, neurotrophins, synaptic plasticity, neurotransmitters, and vasculature...
May 11, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28490543/molecular-regulation-of-exercise-induced-muscle-fiber-hypertrophy
#19
Marcas M Bamman, Brandon M Roberts, Gregory R Adams
Skeletal muscle hypertrophy is a widely sought exercise adaptation to counteract the muscle atrophy of aging and disease, or to improve athletic performance. While this desired muscle enlargement is a well-known adaptation to resistance exercise training (RT), the mechanistic underpinnings are not fully understood. The purpose of this review is thus to provide the reader with a summary of recent advances in molecular mechanisms-based on the most current literature-that are thought to promote RT-induced muscle hypertrophy...
May 10, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28490541/exosomes-as-mediators-of-the-systemic-adaptations-to-endurance-exercise
#20
Adeel Safdar, Mark A Tarnopolsky
Habitual endurance exercise training is associated with multisystemic metabolic adaptations that lower the risk of inactivity-associated disorders such as obesity and type 2 diabetes mellitus (T2DM). Identification of complex systemic signaling networks responsible for these benefits are of great interest because of their therapeutic potential in metabolic diseases; however, specific signals that modulate the multisystemic benefits of exercise in multiple tissues and organs are only recently being discovered...
May 10, 2017: Cold Spring Harbor Perspectives in Medicine
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