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https://www.readbyqxmd.com/read/28316011/changes-in-pro-inflammatory-markers-and-leucine-concentrations-in-response-to-nordic-walking-training-combined-with-vitamin-d-supplementation-in-elderly-women
#1
A Gmiat, J Mieszkowski, K Prusik, K Prusik, J Kortas, A Kochanowicz, A Radulska, M Lipiński, M Tomczyk, J Jaworska, J Antosiewicz, E Ziemann
Mechanisms underpinning age-related decreases in muscle strength and muscle mass relate to chronic inflammation. Physical activity induces an anti-inflammatory effect, but it is modulated by additional factors. We hypothesized that vitamin D, which has also anti-inflammatory activity will modify adaptation to exercise and reduce inflammation in elderly women. Twenty-seven women aged 67 ± 8 years were included and divided into groups with baseline vitamin D concentration more than 20 ng mL(-1) (MVD) and less than 20 ng mL(-1) (LVD)...
March 18, 2017: Biogerontology
https://www.readbyqxmd.com/read/28286777/effect-of-human-myotubes-derived-media-on-glucose-stimulated-insulin-secretion
#2
Maria L Mizgier, Luis R Cataldo, Juan Gutierrez, José L Santos, Mariana Casas, Paola Llanos, Ariel E Contreras-Ferrat, Cedric Moro, Karim Bouzakri, Jose E Galgani
Fasting to postprandial transition requires a tight adjustment of insulin secretion to its demand, so tissue (e.g., skeletal muscle) glucose supply is assured while hypo-/hyperglycemia are prevented. High muscle glucose disposal after meals is pivotal for adapting to increased glycemia and might drive insulin secretion through muscle-released factors (e.g., myokines). We hypothesized that insulin influences myokine secretion and then increases glucose-stimulated insulin secretion (GSIS). In conditioned media from human myotubes incubated with/without insulin (100 nmol/L) for 24 h, myokines were qualitatively and quantitatively characterized using an antibody-based array and ELISA-based technology, respectively...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28270597/interaction-between-plasma-fetuin-a-and-free-fatty-acids-predicts-changes-in-insulin-sensitivity-in-response-to-long-term-exercise
#3
Sindre Lee, Frode Norheim, Hanne L Gulseth, Torgrim M Langleite, Kristoffer J Kolnes, Daniel S Tangen, Hans K Stadheim, Gregor D Gilfillan, Torgeir Holen, Kåre I Birkeland, Jørgen Jensen, Christian A Drevon
The hepatokine fetuin-A can together with free fatty acids (FFAs) enhance adipose tissue (AT) inflammation and insulin resistance via toll-like receptor 4 (TLR4). Although some of the health benefits of exercise can be explained by altered release of myokines from the skeletal muscle, it is not well documented if some of the beneficial effects of exercise can be explained by altered secretion of hepatokines. The aim of this study was to examine the effect of interaction between fetuin-A and FFAs on insulin sensitivity after physical exercise...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28242329/the-effects-of-intracerebroventricular-infusion-of-irisin-on-feeding-behaviour-in-rats
#4
Suat Tekin, Yavuz Erden, Fatma Ozyalin, Yilmaz Cigremis, Cemil Colak, Suleyman Sandal
Irisin, a novel exercise-induced myokine, has attracted attention with its effects on energy metabolism. This study was conducted to determine the possible effects of irisin on nutritional behaviour. In this study, 40 male Wistar Albino rats were separated into 4 groups (n=10 for each group). Osmotic mini-pumps were connected to metal cannulas implanted to lateral ventricle; and artificial cerebrospinal fluid (vehicle), and 10 and 100nM of irisin was infused for 7days. The daily food and water consumptions and body weights of rats were followed up...
February 24, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28237320/a-perspective-on-metabolic-surgery-from-a-gastroenterologist
#5
REVIEW
Yu-Fong Syu, Akio Inui, Chih-Yen Chen
Type 2 diabetes (T2D) and obesity are important public health problems. The global prevalence of diabetes mellitus is 8.8%. Interventional diabetology and obesitology have been recently advocated as treatment options for T2D and obesity. The roles of metabolic surgery such as Roux-en-Y gastric bypass, sleeve gastrectomy, gastric banding, and biliopancreatic diversion are focused. Different types of metabolic surgeries have different glucose-lowering and weight loss effects. Endoscopic treatments include the intra-gastric balloon (to restrict the gastric volume) and duodenal-jejunal bypass liner (DJBL, as a malabsorptive procedure)...
January 19, 2017: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/28223503/mitochondrial-energy-deficiency-leads-to-hyperproliferation-of-skeletal-muscle-mitochondria-and-enhanced-insulin-sensitivity
#6
Ryan M Morrow, Martin Picard, Olga Derbeneva, Jeremy Leipzig, Meagan J McManus, Gilles Gouspillou, Sébastien Barbat-Artigas, Carlos Dos Santos, Russell T Hepple, Deborah G Murdock, Douglas C Wallace
Diabetes is associated with impaired glucose metabolism in the presence of excess insulin. Glucose and fatty acids provide reducing equivalents to mitochondria to generate energy, and studies have reported mitochondrial dysfunction in type II diabetes patients. If mitochondrial dysfunction can cause diabetes, then we hypothesized that increased mitochondrial metabolism should render animals resistant to diabetes. This was confirmed in mice in which the heart-muscle-brain adenine nucleotide translocator isoform 1 (ANT1) was inactivated...
March 7, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28211512/physiology-and-role-of-irisin-in-glucose-homeostasis
#7
REVIEW
Nikolaos Perakakis, Georgios A Triantafyllou, José Manuel Fernández-Real, Joo Young Huh, Kyung Hee Park, Jochen Seufert, Christos S Mantzoros
Irisin is a myokine that leads to increased energy expenditure by stimulating the 'browning' of white adipose tissue. In the first description of this hormone, increased levels of circulating irisin, which is cleaved from its precursor fibronectin type III domain-containing protein 5, were associated with improved glucose homeostasis by reducing insulin resistance. Consequently, several studies attempted to characterize the role of irisin in glucose regulation, but contradictory results have been reported, and even the existence of this hormone has been questioned...
February 17, 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/28188344/skeletal-muscle-secretome-in-duchenne-muscular-dystrophy-a-pivotal-anti-inflammatory-role-of-adiponectin
#8
S Lecompte, M Abou-Samra, R Boursereau, L Noel, S M Brichard
BACKGROUND: Persistent inflammation exacerbates the progression of Duchenne muscular dystrophy (DMD). The hormone, adiponectin (ApN), which is decreased in the metabolic syndrome, exhibits anti-inflammatory properties on skeletal muscle and alleviates the dystrophic phenotype of mdx mice. Here, we investigate whether ApN retains its anti-inflammatory action in myotubes obtained from DMD patients. We unravel the underlying mechanisms by studying the secretome and the early events of ApN...
February 10, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28183451/the-novel-exercise-induced-hormone-irisin-protects-against-neuronal-injury-via-activation-of-the-akt-and-erk1-2-signaling-pathways-and-contributes-to-the-neuroprotection-of-physical-exercise-in-cerebral-ischemia
#9
Dong-Jie Li, Yong-Hua Li, Hong-Bin Yuan, Le-Feng Qu, Pei Wang
BACKGROUND: Irisin is a novel exercise-induced myokine involved in the regulation of adipose browning and thermogenesis. In this study, we investigated the potential role of irisin in cerebral ischemia and determined whether irisin is involved in the neuroprotective effect of physical exercise in mice. MATERIALS AND METHODS: The middle cerebral artery occlusion (MCAO) model was used to produce cerebral ischemia in mice. First, the plasma irisin levels and changes in expression of the irisin precursor protein FNDC5 in skeletal muscle were determined post ischemic stroke...
March 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28177716/a-role-for-maternally-derived-myokines-to-optimize-placental-function-and-fetal-growth-across-gestation
#10
Chantal Dubé, Céline Aguer, Kristi Adamo, Shannon Bainbridge
Exercise during pregnancy is associated with improved health outcomes for both mother and baby, including a reduced risk of future obesity and susceptibility to chronic diseases. Overwhelming evidence demonstrates a protective effect of maternal exercise against fetal birth weight extremes, reducing the rates of both large- and small-for-gestational-age infants. It is speculated that this protective effect is mediated in part through exercise-induced regulation of maternal physiology and placental development and function...
January 17, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28164323/effects-of-exercise-induced-apelin-levels-on-skeletal-muscle-and-their-capillarization-in-type-2-diabetic-rats
#11
Jun Seok Son, Hee-Jae Kim, Yeri Son, Hojun Lee, Song Ah Chae, Je Kyung Seong, Wook Song
INTRODUCTION: Exercise-induced apelin as a myokine is believed to play a role in the improvement of type 2 diabetes mellitus (T2DM) and capillarization. In this study, we evaluated the association between exercise-induced apelin and muscle capillarization. METHODS: Zucker rats underwent a treadmill exercise program. Body composition, muscle strength, muscle size, muscle capillarization, and insulin resistance (homeostatic model assessment [HOMA-IR]) were measured...
February 6, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28154590/serum-irisin-level-can-predict-the-severity-of-coronary-artery-disease-in-patients-with-stable-angina
#12
Tolga Han Efe, Burak Açar, Ahmet Göktuğ Ertem, Kadriye Gayretli Yayla, Engin Algül, Çağrı Yayla, Sefa Ünal, Murat Bilgin, Tolga Çimen, Özgür Kirbaş, Ekrem Yeter
BACKGROUND AND OBJECTIVES: The recently discovered myokine irisin has a proposed role in adipose tissue metabolism. The aim of this study was to evaluate the relationship between serum irisin level and the coronary artery severity in patients with stable coronary artery disease (CAD). SUBJECTS AND METHODS: Sixty-three patients who underwent coronary angiography (CA) diagnosed with stable CAD and twenty-six patients with normal coronary artery (NCA) were enrolled in the study...
January 2017: Korean Circulation Journal
https://www.readbyqxmd.com/read/28154348/promoting-effect-of-%C3%AE-tocopherol-on-beige-adipocyte-differentiation-in-3t3-l1-cells-and-rat-white-adipose-tissue
#13
Rieko Tanaka-Yachi, Chie Takahashi-Muto, Kazuya Adachi, Yukina Tanimura, Yoshinori Aoki, Taisuke Koike, Chikako Kiyose
Thermogenic adipocytes that are distinct from classical brown adipocytes (beige adipocytes) were identified in 2012. Beige adipocytes are also called inducible brown adipocytes because their differentiation is induced by a number of physiological stimuli, including adrenaline or myokines. PPARγ is the master regulator of adipogenesis and promotes thermogenic adipocyte differentiation. A PPARγ agonist also promotes thermogenic adipocyte differentiation in mouse white adipose tissues. The vitamin E analog α-tocopherol promotes PPARγ expression and induces mRNA expression of target genes...
2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28147449/exercise-effects-on-perivascular-adipose-tissue-endocrine-and-paracrine-determinants-of-vascular-function
#14
REVIEW
B C S Boa, J S Yudkin, V W M van Hinsbergh, E Bouskela, E C Eringa
Obesity is a global epidemic, accompanied by increased risk of type 2 diabetes and cardiovascular disease. Adipose tissue hypertrophy is associated with adipose tissue inflammation, which alters secretion of adipose tissue-derived bioactive products, known as adipokines. Adipokines determine vessel wall properties such as smooth muscle tone and vessel wall inflammation. Exercise is a mainstay of prevention of chronic, non-communicable diseases, type 2 diabetes and cardiovascular disease in particular. Aside from reducing adipose tissue mass, exercise has been shown to reduce inflammatory activity in this tissue...
February 1, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28145500/muscle-specific-overexpression-of-adipor1-or-adipor2-gives-rise-to-common-and-discrete-local-effects-whilst-adipor2-promotes-additional-systemic-effects
#15
Sahar Keshvari, Darren C Henstridge, Choaping Ng, Mark A Febbraio, Jonathan P Whitehead
Hypoadiponectinemia and adiponectin resistance are implicated in the aetiology of obesity-related cardiometabolic disorders, hence represent a potential therapeutic axis. Here we characterised the effects of in vivo electrotransfer-mediated overexpression of the adiponectin receptors, AdipoR1 or AdipoR2, into tibialis anterior muscle (TAM) of lean or obese mice. In lean mice, TAM-specific overexpression of AdipoR1 ((TAM)R1) or AdipoR2 ((TAM)R2) increased phosphorylation of AMPK, AKT and ERK and expression of the insulin responsive glucose transporter glut4...
February 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28144410/can-resistance-exercise-alter-irisin-levels-and-expression-profiles-of-fndc5-and-ucp1-in-rats
#16
Jalil Reisi, Kamran Ghaedi, Hamid Rajabi, Sayyed Mohammad Marandi
BACKGROUND: Irisin is a new myokine secreted from the skeletal muscle and appears to affect the metabolism of adipose tissue. OBJECTIVES: The mechanisms of cellular and molecular identification by which exercise training exerts its benefits remain unclear and are under investigation. METHODS: We examined the effect of 8-week resistance exercise on plasma irisin levels and expression profiles of muscle FNDC5 and subcutaneous adipose tissue UCP1 in male rats...
December 2016: Asian Journal of Sports Medicine
https://www.readbyqxmd.com/read/28138894/every-exercise-bout-matters-linking-systemic-exercise-responses-to-breast-cancer-control
#17
REVIEW
Christine Dethlefsen, Katrine Seide Pedersen, Pernille Hojman
Cumulative epidemiological evidence shows that regular exercise lowers the risk of developing breast cancer and decreases the risk of disease recurrence. The causality underlying this relation has not been fully established, and the exercise recommendations for breast cancer patients follow the general physical activity guidelines, prescribing 150 min of exercise per week. Thus, elucidations of the causal mechanisms are important to prescribe and implement the most optimal training regimen in breast cancer prevention and treatment...
January 30, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28125733/plasma-irisin-modestly-increases-during-moderate-and-high-intensity-afternoon-exercise-in-obese-females
#18
Nathan C Winn, Zachary I Grunewald, Ying Liu, Timothy D Heden, Lauren M Nyhoff, Jill A Kanaley
BACKGROUND AND PURPOSE: Irisin is an exercise-responsive myokine that has been proposed to exert anti-obesity benefits; yet its response during exercise in obese women is not described. This study characterized plasma irisin levels during a single bout of afternoon isocaloric-exercise of different intensities (moderate- vs high-intensity) in obese females. METHODS: Eleven obese females participated in 3 randomized study days beginning at 1600h: 1) no exercise (NoEx), 2) moderate exercise (ModEx; 55%VO2max) and 3) high intensity interval exercise (IntEx; 4 min (80%VO2max)/3 min (50% VO2max)...
2017: PloS One
https://www.readbyqxmd.com/read/28112528/omega-3-fatty-acid-could-increase-one-of-myokines-in-male-patients-with-coronary-artery-disease-a-randomized-double-blind-placebo-controlled-trial
#19
RANDOMIZED CONTROLLED TRIAL
Fahimeh Agh, Niyaz Mohammadzadeh Honarvar, Mahmoud Djalali, Ebrahim Nematipour, Sanaz Gholamhoseini, Mahnaz Zarei, Samaneh Ansari, Mohammad Hassan Javanbakht
BACKGROUND: Omega-3 fatty acids have a protective role against cardiovascular disease and these protective properties are attributed to its anti-inflammatory effects. Myokines have anti-inflammatory properties and thereby reduce low-grade inflammation. Irisin, as a myokine, is considered to be therapeutic for human metabolic diseases. This study was conducted to determine the effects of Omega-3 fatty acids supplementation on serum irisin in men with coronary artery disease (CAD). METHODS: This study was an 8-week randomized, double-blind, placebo-controlled trial...
January 2017: Archives of Iranian Medicine
https://www.readbyqxmd.com/read/28070865/sphingosine-1-phosphate-pretreatment-amends-hypoxia-induced-metabolic-dysfunction-and-impairment-of-myogenic-potential-in-differentiating-c2c12-myoblasts-by-stimulating-viability-calcium-homeostasis-and-energy-generation
#20
Babita Rahar, Sonam Chawla, Sanjay Pandey, Anant Narayan Bhatt, Shweta Saxena
Sphingosine-1-phosphate (S1P) has a role in transpiration in patho-physiological signaling in skeletal muscles. The present study evaluated the pre-conditioning efficacy of S1P in facilitating differentiation of C2C12 myoblasts under a normoxic/hypoxic cell culture environment. Under normoxia, exogenous S1P significantly promoted C2C12 differentiation as evident from morphometric descriptors and differentiation markers of the mature myotubes, but it could facilitate only partial recovery from hypoxia-induced compromised differentiation...
January 9, 2017: Journal of Physiological Sciences: JPS
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