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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
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
https://www.readbyqxmd.com/read/28480382/the-effect-of-caffeine-supplementation-on-trained-individuals-subjected-to-maximal-treadmill-test
#8
Viviane Martins Mana Salicio, Carlos Alexandre Fett, Marcos Adriano Salicio, Camila Fernanda Costa Cunha Moraes Brandäo, Luiz Fabrizio Stoppiglia, Waléria Christiane Rezende Fett, And Clovis Botelho
BACKGROUND: Intense physical training increases oxidative stress and inflammation, resulting into muscle and cellular damage. The aim of this study was to analyze the effect of caffeine supplementation on trained young individuals subjected to two treadmill maximal tests. MATERIALS AND METHODS: It was a double-blind and crossover study comprising 24 active individuals within the age group 18-30 years. The comparisons were conducted: the effect of exercise (week 1 x 2) and caffeine intake (GC x GP) on thiobarbituric acid (TBARS), interleukin 6 (IL-6), interleukin 10 (IL-10) and superoxide dismutase (SOD) variables during pre-exercise time (30 min...
2017: African Journal of Traditional, Complementary, and Alternative Medicines: AJTCAM
https://www.readbyqxmd.com/read/28479383/association-of-irisin-and-fndc5-rs16835198-g-t-gene-polymorphism-with-type-2-diabetes-mellitus-and-diabetic-nephropathy-an-egyptian-pilot-study
#9
Emad Gamil Khidr, Shawkey Seddik Ali, Mostafa Mahmoud El-Shafaey, Olfat Ahmed Fawzy
Diabetes mellitus is a fast-growing health problem in Egypt affecting morbidity, mortality and health care resources. Irisin, a new exercise-induced myokine inducing browning of white adipose tissues, has gained a great interest as a potential new target for combating type 2 diabetes mellitus (T2DM) and its complications. In this study, we assessed serum irisin levels in T2DM and diabetic nephropathy to elucidate possible relationships between irisin and metabolic parameters and renal functions. We also investigated, for the first time in Egypt, the association of FNDC5 rs16835198 G<T polymorphism with T2DM, diabetic nephropathy and irisin levels...
May 4, 2017: Gene
https://www.readbyqxmd.com/read/28472477/fibronectin-type-iii-domain-containing-protein-5-rs3480-a-g-polymorphism-irisin-and-liver-fibrosis-in-patients-with-nonalcoholic-fatty-liver-disease
#10
Salvatore Petta, Luca Valenti, Gianluca Svegliati-Baroni, Massimiliano Ruscica, Rosaria Maria Pipitone, Paola Dongiovanni, Chiara Rychlicki, Nicola Ferri, Calogero Cammà, Anna Ludovica Fracanzani, Irene Pierantonelli, Vito Di Marco, Marica Meroni, Debora Giordano, Stefania Grimaudo, Marco Maggioni, Daniela Cabibi, Silvia Fargion, Antonio Craxì
Context: Contrasting data have been reported on the role of irisin, a novel myokine encoded by the FNDC5 gene, in NAFLD pathogenesis. We tested in patients with suspected NASH the association of FNDC5 variants, hepatic expression and circulating irisin with liver damage(F2-F4 fibrosis as main outcome). We also investigated whether irisin modulates hepatocellular fat accumulation and stellate cell activation in experimental models. Methods: We considered 593 consecutive patients, who underwent liver biopsy for suspected NASH and 192 patients with normal liver enzymes and without steatosis...
May 3, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28465350/myostatin-inhibits-osteoblastic-differentiation-by-suppressing-osteocyte-derived-exosomal-microrna-218-a-novel-mechanism-in-muscle-bone-communication
#11
Yiwen Qin, Yuanzhen Peng, Wei Zhao, Jianping Pan, Hanna Ksiezak-Reding, Christopher Cardozo, Yingjie Wu, Paola Divieti Pajevic, Lynda F Bonewald, William A Bauman, Weiping Qin
Muscle and bone are closely associated in both anatomy and function, but the mechanisms that coordinate their synergistic action remain poorly defined. Myostatin, a myokine secreted by muscles, has been shown to inhibit muscle growth, and the disruption of the myostatin gene has been reported to cause muscle hypertrophy and increase bone mass. Extracellular vesicle-exosomes that carry microRNA (miRNA), mRNA, and proteins are known to perform an important role in cell-cell communication. We hypothesized that myostatin may play a crucial role in muscle-bone interactions and may promote direct effects on osteocytes and on osteocyte-derived exosomal miRNAs, thereby indirectly influencing the function of other bone cells...
May 2, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28453881/effect-of-an-acute-exercise-bout-on-immediate-post-exercise-irisin-concentration-in-adults-a-meta-analysis
#12
REVIEW
Jill Fox, Brittany V Rioux, Eric D B Goulet, Neil M Johanssen, Damon L Swift, Danielle R Bouchard, Hal Loewen, Martin Sénéchal
BACKGROUND: Irisin is a recently discovered myokine that increases adipocyte metabolism, induces further "browning" of white adipose tissue, and enhance glucose metabolism. No study has ever determined how an acute bout of exercise impacts immediate post-exercise irisin concentration using a meta-analytic approach. OBJECTIVE: To determine the impact of an acute bout of exercise on the magnitude of post-exercise irisin concentration in adults using meta-analytic procedures...
April 28, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28449327/skeletal-muscle-il-15-il-15r%C3%AE-and-myofibrillar-protein-synthesis-after-resistance-exercise
#13
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/28445520/serum-irisin-levels-correlated-to-peritoneal-dialysis-adequacy-in-nondiabetic-peritoneal-dialysis-patients
#14
Zhijun Tan, Zengchun Ye, Jun Zhang, Yanru Chen, Cailian Cheng, Cheng Wang, Xun Liu, Tanqi Lou, Hui Peng
BACKGROUND: Irisin is a recently discovered myokine thought to be involved in multiple metabolism abnormalities in most dialysis patients. However, the myokine has not been thoroughly studied in peritoneal dialysis. This study aimed to evaluate serum irisin levels and establish their relation to dialysis adequacy, insulin resistance, and bone metabolism status in patients on peritoneal dialysis. METHODS: A total of 59 nondiabetic prevalent peritoneal dialysis patients and 52 age- and sex-matched healthy controls were enrolled in this cross-sectional study...
2017: PloS One
https://www.readbyqxmd.com/read/28437576/irisin-and-musculoskeletal-health
#15
Graziana Colaianni, Saverio Cinti, Silvia Colucci, Maria Grano
Irisin is a hormone-like myokine produced in abundance by skeletal muscle in response to exercise, both in mice and humans. Once released into the circulation, irisin acts on white adipocytes to induce the browning response and subsequently activates nonshivering thermogenesis. We have examined the premise that irisin produced during exercise may subserve further functions in the musculoskeletal system. We review evidence for its possible skeletal effects, including the central role that irisin plays in the control of bone mass, with positive effects on cortical mineral density and geometry in mice...
April 24, 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28425943/beneficial-effect-of-voluntary-exercise-on-experimental-colitis-in-mice-fed-a-high-fat-diet-the-role-of-irisin-adiponectin-and-proinflammatory-biomarkers
#16
Agnieszka Irena Mazur-Bialy, Jan Bilski, Dagmara Wojcik, Bartosz Brzozowski, Marcin Surmiak, Magdalena Hubalewska-Mazgaj, Anna Chmura, Marcin Magierowski, Katarzyna Magierowska, Tomasz Mach, Tomasz Brzozowski
Inflammatory bowel diseases (IBDs) are a heterogeneous group of disorders exhibited by two major phenotypic forms: Crohn's disease and ulcerative colitis. Although the aetiology of IBD is unknown, several factors coming from the adipose tissue and skeletal muscles, such as cytokines, adipokines and myokines, were suggested in the pathogenesis of ulcerative colitis; however, it has not been extensively studied whether voluntary exercise can ameliorate that disorder. We explored the effect of moderate exercise (i...
April 20, 2017: Nutrients
https://www.readbyqxmd.com/read/28424548/decreased-levels-of-irisin-a-skeletal-muscle-cell-derived-myokine-are-related-to-emphysema-associated-with-chronic-obstructive-pulmonary-disease
#17
Yukari Sugiyama, Kazuhisa Asai, Kazuhiro Yamada, Yuko Kureya, Naoki Ijiri, Tetsuya Watanabe, Hiroshi Kanazawa, Kazuto Hirata
BACKGROUND: Cigarette smoking-induced oxidant-antioxidant imbalance is a factor that contributes to the pathogenesis of COPD through epithelial cell apoptosis. Irisin is a skeletal muscle cell-derived myokine associated with physical activity. Irisin is also known to decrease oxidant-induced apoptosis in patients with diabetes mellitus. However, the correlation between irisin and emphysema in COPD and its role in epithelial cell apoptosis remains unknown. SUBJECTS AND METHODS: Forty patients with COPD were enrolled in this study...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28422851/relation-between-serum-myokines-and-phase-ii-cardiac-rehabilitation
#18
Der-Sheng Han, Ming-Yen Hsiao, Tyng-Guey Wang, Ssu-Yuan Chen, Wei-Shiung Yang
Patients with coronary heart disease or acute myocardial infarction after cardiac catheterization with stenting referred for phase II cardiac rehabilitation (CR) were grouped according to their preference. Cardio-pulmonary exercise testing (CPET) was used to determine oxygen uptake ((Equation is included in full-text article.)) at peak exercise and anaerobic threshold (AT). The control patients received counseling only while the experiment group received 36 sessions of CR in 3 to 6 months. Exercise physiology parameters and serum myokines (myostatin, insulin-like growth factor-1 (IGF-1), and interleukin-6 (IL-6) were measured pre- and postrehabilitation...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28407519/skeletal-muscle-autophagy-and-its-role-in-sarcopenia-and-organismal-aging
#19
REVIEW
Jianqin Jiao, Fabio Demontis
Sarcopenia, the loss of skeletal muscle mass and strength in the aged, is an important medical condition but its etiology is incompletely understood. Because autophagy promotes myofiber atrophy in the young, it was believed that autophagy inhibition would prevent sarcopenia. However, recent studies have revealed that autophagy actually maintains muscle mass and that its function declines during muscle aging. Consistently, boosting basal autophagy protects from age-related muscle dysfunction by promoting the selective degradation of misfolded proteins and dysfunctional organelles...
April 10, 2017: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/28394923/effects-and-underlying-mechanisms-of-irisin-on-the-proliferation-and-apoptosis-of-pancreatic-%C3%AE-cells
#20
Shiwei Liu, Fang Du, Xin Li, Mingming Wang, Ruixue Duan, Jiaxin Zhang, Yaru Wu, Qi Zhang
Pancreatic β cell dysfunction and reduction due to glucose toxicity play a crucial role in the development of type 2 diabetes mellitus (T2DM). Irisin, a novel exercise-induced myokine, reduces obesity, improves insulin resistance and lowers blood glucose by promoting the browning of white adipose tissue, thereby enhancing thermogenesis and increasing energy expenditure. Recent studies have reported that irisin promotes cell proliferation and protects cells from apoptosis. However, the effects of irisin on pancreatic β cells are unknown...
2017: PloS One
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