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Irisin

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https://www.readbyqxmd.com/read/29160051/irisin-as-a-regulator-of-bone-and-glucose-metabolism-a-narrative-review
#1
Silvia I Briganti, Gianluigi Gaspa, Gaia Tabacco, Anda M Naciu, Roberto Cesareo, Silvia Manfrini, Andrea Palermo
In humans, irisin is produced mainly by skeletal muscle in response to physical activity. It has been demonstrated that irisin plays a pivotal role in inducing fat browning and regulating energy expenditure. New findings from various studies conducted in both animals and humans suggest that irisin can affect bone and glucose metabolism. In particular, irisin is able to increase bone cortical mass by stimulating the osteoblast pathways, and irisin levels are inversely correlated with the incidence of fragility fractures among postmenopausal women affected by osteoporosis...
November 20, 2017: Minerva Endocrinologica
https://www.readbyqxmd.com/read/29160049/lower-irisin-levels-in-coronary-artery-disease-a-meta-analysis
#2
Wenwen Guo, Baihui Zhang, Xia Wang
INTRODUCTION: Irisin is a newly discovered myokine, which is involved in energy metabolism and associated with "browning" of the white adipose tissue, obesity, diabetes mellitus and metabolic syndrome. It's still uncertain that whether irisin level is associated with coronary artery disease. The purpose of this study is to explore the relationship between irisin levels and coronary artery disease. EVIDENCE ACQUISITION: A search of PubMed, MEDLINE, Elsevier Science Direct, Springer, Web of Science and China National Knowledge Infrastructure (CNKI) for studies published from 2000 to 2017 was undertaken to identify relevant studies...
November 20, 2017: Minerva Endocrinologica
https://www.readbyqxmd.com/read/29153685/effects-of-delivery-on-maternal-neonatal-irisin-levels-in-normal-and-preeclamptic-pregnant-women
#3
Ashraf A Foda, Engy A Foda
STUDY OBJECTIVE: The aim of this work was to measure the irisin levels in maternal and umbilical cord serums at cesarean section and vaginal delivery. STUDY DESIGN: This is a case-control study conducted at the Obstetric Department of the Mansoura University Hospital, Mansoura University, Egypt. MATERIAL AND METHODS: The 150 nulliparous cases were divided into three groups. MAIN OUTCOME MEASURE: Serum irisin concentrations were assayed by enzyme-linked immunosorbent assay (ELISA) method...
October 2017: Pregnancy Hypertension
https://www.readbyqxmd.com/read/29151248/adiponectin-and-vitamin-d-binding-protein-are-independently-associated-at-birth-in-both-mothers-and-neonates
#4
Spyridon N Karras, Stergios Α Polyzos, Danforth A Newton, Carol L Wagner, Bruce W Hollis, Jody van den Ouweland, Erdinc Dursun, Duygu Gezen-Ak, Kalliopi Kotsa, Cedric Annweiler, Declan P Naughton
CONTEXT: Adult body fat is associated with birth anthropometry, suggesting a role for metabolic regulators including vitamin D and the adipokines-adiponectin and irisin-which have been reported to interact but, as yet, data remain controversial. OBJECTIVE: To study (i) the relationship between vitamin D, its binding protein (VDBP) and the adipokines, adiponectin, and irisin in mothers and neonates at birth and (ii) their effects on neonate anthropometric outcomes...
November 18, 2017: Endocrine
https://www.readbyqxmd.com/read/29138395/myokine-mediated-muscle-kidney-crosstalk-suppresses-metabolic-reprogramming-and-fibrosis-in-damaged-kidneys
#5
Hui Peng, Qianqian Wang, Tanqi Lou, Jun Qin, Sungyun Jung, Vivekananda Shetty, Feng Li, Yanlin Wang, Xin-Hua Feng, William E Mitch, Brett H Graham, Zhaoyong Hu
Kidney injury initiates metabolic reprogramming in tubule cells that contributes to the development of chronic kidney disease (CKD). Exercise has been associated with beneficial effects in patients with CKD. Here we show that the induction of a myokine, irisin, improves kidney energy metabolism and prevents kidney damage. In response to kidney injury, mice with muscle-specific PGC-1α overexpression (mPGC-1α) exhibit reduced kidney damage and fibrosis. Metabolomics analysis reveals increased ATP production and improved energy metabolism in injured kidneys from mPGC-1α mice...
November 14, 2017: Nature Communications
https://www.readbyqxmd.com/read/29131244/a-review-on-irisin-a-new-protagonist-that-mediates-muscle-adipose-bone-neuron-connectivity
#6
B Grygiel-Górniak, M Puszczewicz
Physical activity improves the quality of life and decreases the risk of several diseases (i.e. stroke, hypertension, myocardial infarction, obesity, and malignancies). Skeletal muscles are considered as an endocrine organ that produces myokines characterized by a paracrine or endocrine activity. Irisin is a circulating hormone-like myokine and is secreted as a product of fibronectin type III domain-containing protein 5 from skeletal muscle in response to exercise. This molecule regulates the energy metabolism and acts in adipose tissue, bones, and nervous system...
October 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29127759/is-irisin-the-new-player-in-exercise-induced-adaptations-or-not-a-2017-update
#7
REVIEW
Ioannis G Fatouros
Irisin is produced by a proteolytic cleavage of fibronectin type III domain-containing protein 5 (FNDC5) and has emerged as a potential mediator of exercise-induced energy metabolism. The purpose of this study was to review the results of studies that investigated irisin responses to acute and chronic exercise and provide an update. A comprehensive search in the databases of MEDLINE was performed (74 exercise studies). The focus of the analysis was on data concerning FNDC5 mRNA expression in skeletal muscle and circulating irisin concentration relatively to exercise mode, intensity, frequency and duration and the characteristics of the sample used...
November 11, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/29121940/plasma-irisin-is-elevated-in-type-2-diabetes-and-is-associated-with-increased-e-selectin-levels
#8
Karan S Rana, Chathyan Pararasa, Islam Afzal, David A Nagel, Eric J Hill, Clifford J Bailey, Helen R Griffiths, Ioannis Kyrou, Harpal S Randeva, Srikanth Bellary, James E Brown
BACKGROUND: Irisin is a hormone released mainly from skeletal muscle after exercise which increases adipose tissue energy expenditure. Adipocytes can also release irisin after exercise, acting as a local adipokine to induce white adipose tissue to take on a brown adipose tissue-like phenotype, suggesting that irisin and its receptor may represent a novel molecular target for the treatment of obesity and obesity-related diabetes. Previous reports provide conflicting evidence regarding circulating irisin levels in patients with type 2 diabetes (T2DM)...
November 9, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/29108900/irisin-and-leptin-concentrations-in-relation-to-obesity-and-developing-type-2-diabetes-a-cross-sectional-and-a-prospective-case-control-study-nested-in-the-normative-aging-study
#9
Ayse Sahin-Efe, Jagriti Upadhyay, Byung-Joon Ko, Fadime Dincer, Kyung Hee Park, Alexandra Migdal, Pantel Vokonas, Christos Mantzoros
OBJECTIVE: To investigate the associations between irisin and leptin levels in obesity and insulin resistance in a cross sectional study. To assess the potential role of irisin and leptin as a predictive marker of T2DM using a nested case-control study. METHODS: Both studies were designed within the longitudinal VA NAS cohort. The cross sectional study involved 111 non obese and 105 obese subjects who were subdivided into two groups based on their fasting glucose tolerance...
November 3, 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29108230/apigenin-enhances-skeletal-muscle-hypertrophy-and-myoblast-differentiation-by-regulating-prmt7
#10
Young Jin Jang, Hyo Jeong Son, Yong Min Choi, Jiyun Ahn, Chang Hwa Jung, Tae Youl Ha
Apigenin, a natural flavone abundant in various plant-derived foods including parsley and celery, has been shown to prevent inflammation and inflammatory diseases. However, the effect of apigenin on skeletal muscle hypertrophy and myogenic differentiation has not previously been elucidated. Here, we investigated the effects of apigenin on quadricep muscle weight and running distance using C57BL/6 mice on an accelerating treadmill. Apigenin stimulated mRNA expression of MHC (myosin heavy chain) 1, MHC2A, and MHC2B in the quadricep muscles of these animals...
October 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/29098483/irisin-alleviates-advanced-glycation-end-products-induced-inflammation-and-endothelial-dysfunction-via-inhibiting-ros-nlrp3-inflammasome-signaling
#11
Xian Deng, Wei Huang, Juan Peng, Ting-Ting Zhu, Xiao-Lei Sun, Xiang-Yu Zhou, Hui Yang, Jian-Feng Xiong, Hu-Qiang He, You-Hua Xu, Yan-Zheng He
The activation of NLR family pyrin domain containing 3 (NLRP3) inflammasome have been implicated in the initiation or progression of atherosclerosis. Recent research showed that irisin, a newly discovered adipomiokine, alleviates endothelial dysfunction in type 2 diabetes partially via reducing oxidative/nitrative stresses, suggesting that irisin may be a promising candidate for the treatment of vascular complications of diabetes. However, the association between irisin and NLRP3 inflammasome in the pathogenesis of atherosclerosis remains unclear...
November 2, 2017: Inflammation
https://www.readbyqxmd.com/read/29097199/trpv4-is-involved-in-irisin-induced-endothelium-dependent-vasodilation
#12
Li Ye, Mengnan Xu, Min Hu, Hai Zhang, Xianming Tan, Qing Li, Bing Shen, Junhao Huang
Irisin, an exercise-induced myokine, induces conversion of white into brown adipocytes, promoting mitochondrial biogenesis and energy expenditure. Irisin has a vascular protective effect on endothelial function in animals, including humans. Defects in irisin signaling pathways result in endothelial dysfunction in obesity and diabetes. However, the mechanisms underlying the effects of irisin on endothelial function have not been elucidated. Transient receptor potential vanilloid subtype 4 (TRPV4) channels are one of the most important Ca(2+)-permeable cation channels in vascular endothelial cells...
October 30, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29069945/higher-circulating-irisin-levels-in-patients-with-polycystic-ovary-syndrome-a-meta-analysis
#13
Chuan Wang, Xin-Yue Zhang, Yu Sun, Xin-Guo Hou, Li Chen
Insulin resistance (IR) has been reported to be highly associated with the pathogenesis of polycystic ovary syndrome (PCOS). Although irisin, a newly identified myokine that may be closely associated with IR, has been implicated in the development of PCOS, the results are still ambiguous. We performed this meta-analysis to compare the circulating irisin levels between PCOS and healthy women and assess the association of irisin with IR. Published works were retrieved from PubMed and Embase databases using combinations of 'irisin' and ('polycystic ovary syndrome' or 'PCOS')...
October 26, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/29066215/treatment-with-long-acting-muscarinic-antagonists-stimulates-serum-levels-of-irisin-in-patients-with-copd
#14
Jyotshna Mandal, Michael Roth, Eleni Papakonstantinou, Qingzhu Sun, Luigi Costa, Lucas Boeck, Andreas Scherr, Janko Rakic, Renaud Louis, Branislava Milenkovic, Wim Boersma, Konstantinos Kostikas, Francesco Blasi, Joachim Aerts, Gernot Rohde, Alicia Lacoma, Antoni Torres, Tobias Welte, Michael Tamm, Daiana Stolz
Long acting muscarinic antagonists (LAMA) are currently considered the therapeutic mainstay for patients with COPD and have been shown to improve clinical outcomes including symptoms, exercise capacity and airflow limitation. Irisin, is a newly discovered hormone-like myokine generated by skeletal muscle cells in response to exercise and it is suggested to regulate energy expenditure and exercise capacity. The aim of the present study was to investigate if treatment with LAMA alters serum irisin levels in patients with COPD...
October 21, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29063670/irisin-inhibits-high-glucose-induced-endothelial-to-mesenchymal-transition-and-exerts-a-dose-dependent-bidirectional-effect-on-diabetic-cardiomyopathy
#15
Xue Liu, Haroon Mujahid, Bing Rong, Qing-Hua Lu, Wei Zhang, Peng Li, Na Li, Er-Shun Liang, Qi Wang, Dong-Qi Tang, Nai-Lin Li, Xiao-Ping Ji, Yu-Guo Chen, Yu-Xia Zhao, Ming-Xiang Zhang
Emerging evidence indicates that irisin provides beneficial effects in diabetes. However, whether irisin influences the development of diabetic cardiomyopathy (DCM) remains unclear. Therefore, we investigated the potential role and mechanism of action of irisin in diabetes-induced myocardial dysfunction in mice. Type 1 diabetes was induced in mice by injecting streptozotocin, and the diabetic mice were administered recombinant r-irisin (low or high dose: 0.5 or 1.5 μg/g body weight/day, I.P.) or PBS for 16 weeks...
October 23, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29062100/irisin-is-a-pro-myogenic-factor-that-induces-skeletal-muscle-hypertrophy-and-rescues-denervation-induced-atrophy
#16
Musarrat Maisha Reza, Nathiya Subramaniyam, Chu Ming Sim, Xiaojia Ge, Durgalakshmi Sathiakumar, Craig McFarlane, Mridula Sharma, Ravi Kambadur
Exercise induces expression of the myokine irisin, which is known to promote browning of white adipose tissue and has been shown to mediate beneficial effects following exercise. Here we show that irisin induces expression of a number of pro-myogenic and exercise response genes in myotubes. Irisin increases myogenic differentiation and myoblast fusion via activation of IL6 signaling. Injection of irisin in mice induces significant hypertrophy and enhances grip strength of uninjured muscle. Following skeletal muscle injury, irisin injection improves regeneration and induces hypertrophy...
October 24, 2017: Nature Communications
https://www.readbyqxmd.com/read/29048621/irisin-reverses-the-il-6-induced-epithelial-mesenchymal-transition-in-osteosarcoma-cell-migration-and-invasion-through-the-stat3-snail-signaling-pathway
#17
Gang Kong, Yunpeng Jiang, Xiujiang Sun, Zhilin Cao, Guodong Zhang, Zhongyuan Zhao, Yong Zhao, Qian Yu, Gong Cheng
As a novel discovered myokine, irisin is considered to be a promising candidate for the treatment of metabolic disorders and cancer. However, little is known about the anti-metastasic effect of irisin on osteosarcoma cells and its underlying mechanisms. In the present study, we aimed to explore the effect of irisin on the migration and invasion of osteosarcoma cells and the underlying mechanisms involved. Viability and proliferation of osteosarcoma cells were examined by MTT assay. Then, by using scratch wound healing assay and Transwell assays, we evaluated migratory and invasive ability of the cells, respectively...
September 20, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29036766/resistance-training-increases-fibroblast-growth-factor-21-and-irisin-levels-in-the-skeletal-muscle-of-zucker-diabetic-fatty-rats
#18
Hee-Jae Kim, Wook Song
PURPOSE: Although the fibroblast growth factor-21 (FGF-21) and irisin roles are well demonstrated in metabolic disease, there have been no reports investigating the effect of resistance exercise on FGF-21 and irisin levels in diabetic skeletal muscles. Therefore, this study aimed to investigate the change of FGF-21 and irisin levels in various skeletal muscles, and their association with muscle strength, following 8 weeks of resistance training using Zucker diabetic fatty rats (type 2 diabetic animal models)...
September 30, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/29027533/factors-associated-with-circulating-concentrations-of-irisin-in-the-general-population-cohort-of-the-abcd-study
#19
S Buscemi, D Corleo, S Vasto, C Buscemi, M F Massenti, D Nuzzo, G Lucisano, A M Barile, G Rosafio, V Maniaci, C Giordano
BACKGROUND: Animal studies have shown that irisin is a myokine secreted following physical exercise, and that it induces the remodeling of white adipose tissue toward brown adipose tissue. Therefore, a protective role of irisin against obesity, diabetes, and other metabolic and cardiovascular conditions has been hypothesized. However, data in humans are contradictory and few data are available concerning the general population. AIMS: We aimed to evaluate the association between serum irisin concentrations and habitual physical activity, as well as other metabolic and cardiovascular factors in a general population in a Mediterranean area...
October 13, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28984289/preanalytical-analytical-and-postanalytical-errors-in-the%C3%A2-measurement-of-irisin-levels-authors-reply
#20
Małgorzata Kałużna, Krzysztof Hoppe, Krzysztof Schwermer, Aisha Y Ibrahim, Krzysztof Pawlaczyk, Katarzyna Ziemnicka
No abstract text is available yet for this article.
September 29, 2017: Polish Archives of Internal Medicine
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