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Yaeko Fukushima, Satoshi Kurose, Hiromi Shinno, Ha Cao Thi Thu, Nana Takao, Hiromi Tsutsumi, Takaaki Hasegawa, Toshiaki Nakajima, Yutaka Kimura
BACKGROUND: Irisin is a myokine implicated in lipid and glucose metabolism. The objective of this study is to examine the effect of a body weight reduction on the serum irisin level and physical indicators in obese Japanese patients without diabetes. METHODS: The subjects were 22 patients (male/female, 5/17; age, 46.1±16.0 years; body mass index [BMI], 36.9±5.0 kg/m(2)) who completed a 6-month body weight reduction program at our clinic. The program included diet, exercise therapy and cognitive behavioral therapy...
October 2016: Diabetes & Metabolism Journal
Fengna Li, Yinghui Li, Yehui Duan, Chien-An A Hu, Yulong Tang, Yulong Yin
Skeletal muscle and adipose tissue are the two largest organs in the body. Skeletal muscle is an effector organ, and adipose tissue is an organ that stores energy; in addition, they are endocrine organs that secrete cytokines, namely myokines and adipokines, respectively. Myokines consist of myostatin, interleukin (IL)-8, IL-15, irisin, fibroblast growth factor 21, and myonectin; adipokines include leptin, adiponectin, resistin, chemerin, and visfatin. Furthermore, certain cytokines, such as IL-6 and tumor necrosis factor-α, are released by both skeletal muscle and adipose tissue and exhibit a bioactive effect; thus, they are called adipo-myokines...
October 13, 2016: Cytokine & Growth Factor Reviews
Amal Akour, Violet Kasabri, Nailya Boulatova, Yasser Bustanji, Randa Naffa, Dana Hyasat, Nahla Khawaja, Haidar Bustanji, Ayman Zayed, Munther Momani
AIMS: Type 2 diabetes mellitus (T2DM) and prediabetes (pre-DM) are associated with changes in levels of metabolic markers. The main aim of this study is to compare the levels of omentin, irisin, endothelin-1, nesfatin, hepatocyte growth factor (HGF), fibroblast growth factor, and oxytocin (OXT) between normoglycemic and pre-DM/T2DM obese Jordanian patients. METHODS: One hundred and ninety-eight adult Jordanian subjects were recruited. Demographic data and clinical parameters were collected...
October 18, 2016: Acta Diabetologica
S Aydin
No abstract text is available yet for this article.
September 2016: European Review for Medical and Pharmacological Sciences
Yanli Li, Xueqin Li, Dejun Sun, Shaoxi Cai
OBJECTIVE: Obesity is involved in the pathogenesis of obstructive sleep apnea syndrome (OSAS). Irisin, a recently discovered myokine, protects the mice from obesity. This study aims to determine the association of serum irisin concentrations with the presence and severity of OSAS. METHODS: This cross-sectional investigation was performed in 165 male OSAS patients and 98 healthy male subjects. Serum irisin concentrations were assessed using an enzyme-linked immunosorbent assay kit...
October 11, 2016: Journal of Clinical Laboratory Analysis
Sven Briken, Sina Cathérine Rosenkranz, Oliver Keminer, Stefan Patra, Gesche Ketels, Christoph Heesen, Rainer Hellweg, Ole Pless, Karl-Heinz Schulz, Stefan M Gold
BACKGROUND: Clinical studies have suggested beneficial effects of exercise on cognitive function in ageing adults and neurodegenerative diseases such as dementia. Recent work indicates the same for progressive multiple sclerosis (MS), an inflammatory and degenerative disease of the central nervous system (CNS). The biological pathways associated with these effects are however not well understood. OBJECTIVE: In this randomized controlled study, we explored serum levels of the myokine Irisin, the neurotrophin brain-derived neurotrophic factor (BDNF) and Interleukin-6 (IL-6) during acute endurance exercise and over the course of a 9-weeks endurance exercise training period in n=42 patients with progressive MS...
October 15, 2016: Journal of Neuroimmunology
J Brenmoehl, D Ohde, E Albrecht, C Walz, A Tuchscherer, A Hoeflich
For the assessment of genetic or conditional factors of fat cell browning, novel and polygenic animal models are required. Therefore, the long-term selected polygenic mouse line DUhTP originally established in Dummerstorf for high treadmill performance is used. DUhTP mice are characterized by increased fat accumulation in the sedentary condition and elevated fat mobilization during mild voluntary physical activity. In the present study, the phenotype of fat cell browning of subcutaneous fat and a potential effect on oral glucose tolerance, an indicator of metabolic health, were addressed in DUhTP mice...
September 30, 2016: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
Anji Lian, Xin Li, Quan Jiang
Irisin, the product of fibronectin type III domain-containing protein 5 (FNDC5) gene, is well-documented to be a regulator of energy metabolism. At present, not much is known about its biological function in non-mammalian species. In this study, a full-length tilapia FDNC5 was cloned and its tissue expression pattern has been confirmed. Based on the sequence obtained, we produced and purified recombinant irisin which could induce uncoupling protein 1 (UCP1) gene expression in tilapia hepatocytes. Further, the rabbit polyclonal irisin antiserum was produced and its specificity was confirmed by antiserum preabsorption...
September 30, 2016: Molecular and Cellular Endocrinology
Sílvia Rocha-Rodrigues, Amaia Rodríguez, Alexandra M Gouveia, Inês O Gonçalves, Sara Becerril, Beatriz Ramírez, Jorge Beleza, Gema Frühbeck, António Ascensão, José Magalhães
AIMS: Exercise-stimulated myokine secretion into circulation may be related with browning in white adipose tissue (WAT), representing a positive metabolic effect on whole-body fat mass. However, limited information is yet available regarding the impact of exercise on myokine-related modulation of adipocyte phenotype in WAT from obese rats. MAIN METHODS: Sprague-Dawley rats (n=60) were divided into sedentary and voluntary physical activity (VPA) groups and fed with standard (35kcal% fat) or high-fat (HFD, 71kcal% fat)-isoenergetic diets...
September 27, 2016: Life Sciences
Fazal Wahab, Muhammad Shahab, Rüdiger Behr
A large body of data suggests that body weight influences puberty onset and adult reproduction. However, the underlying mechanism of how body weight influences puberty onset and fertility is not completely understood. The hypothalamic neuronal circuit regulating reproduction is restrained by inhibitory signals during childhood. At the time of puberty, these inhibitory signals are weakened and supplanted by stimulatory signals that, in turn, stimulate the release of gonadotropin-releasing hormone (GnRH) - a hypothalamic neuropeptide governing reproduction...
October 2016: Medical Hypotheses
J Fu, Y Han, J Wang, P A Jose, C Zeng
No abstract text is available yet for this article.
July 2016: Journal of the American Society of Hypertension: JASH
Yuzhu Zhang, Haibo Song, Yuan Zhang, Fei Wu, Qian Mu, Miao Jiang, Fang Wang, Wen Zhang, Liang Li, Lei Shao, Shiwu Li, Lijun Yang, Mingxiang Zhang, Qi Wu, Dongqi Tang
BACKGROUND: Irisin is a newly discovered myokine that has been considered a promising candidate for the treatment of cardiovascular disease through improving endothelial function. However, little is known about the role of irisin in the progression of atherosclerosis. METHODS AND RESULTS: We used a carotid partial ligation model of apolipoprotein E-deficient mice fed on a high-cholesterol diet to test the anti-atherosclerosis effect of irisin. Irisin treatment significantly suppressed carotid neointima formation...
2016: Journal of the American Heart Association
Robert H Coker, Alyssa N Weaver, Melynda S Coker, Carl J Murphy, Hanns-Christian Gunga, Mathias Steinach
PURPOSE: The Yukon Arctic Ultra is considered the longest and coldest ultraendurance event in the world. Cold exposure and exercise has been reported to influence circulating levels of myo-, adipo- and hepato-kines that may influence considerable alterations in the regulation of metabolism. The purpose of the study was to evaluate the influence of the Yukon Arctic Ultra (430 mile event) on potential activators of brown fat, metabolites and body composition in healthy individuals. METHODS: Eight male and female participants (mean±SEM; age = 44±3 yr; BMI = 23...
September 16, 2016: Medicine and Science in Sports and Exercise
K Witek, P Żurek, P Zmijewski, J Jaworska, P Lipińska, A Dzedzej-Gmiat, J Antosiewicz, E Ziemann
The study investigated changes in myokines, heat shock proteins, and growth factors in highly ranked, young, male tennis players in response to physical workload during the competitive season and their potential correlations with match scores. Blood collections were carried out at the beginning, the midpoint, and the end of the tournament season. Data analysis revealed a significant increase in interleukin 6 and its inverse correlation with the number of lost games (r = -0.45; 90% CI -0.06 to 0.77). Neither the irisin nor BDNF level changed notably, yet delta changes of irisin across the season significantly correlated with the number of games won...
2016: BioMed Research International
Ningning Hou, Yihui Liu, Fang Han, Di Wang, Xiaoshuang Hou, Shuting Hou, Xiaodong Sun
AIMS: To determine whether irisin could improve perivascular adipose tissue (PVAT) dysfunction via regulation of the heme oxygenase-1 (HO-1)/adiponectin axis in obesity. MATERIALS AND METHODS: C57BL/6 mice were given chow or a high-fat diet (HFD) with or without treatment with irisin. The concentration-dependent responses of the thoracic aorta with or without PVAT (PVAT+ or PVAT-) to phenylephrine were studied in an organ bath. Protein levels of HO-1 and adiponectin were determined by western blot...
September 13, 2016: Journal of Molecular and Cellular Cardiology
M Belviranli, N Okudan, F Çelik
Irisin is a myokine/adipokine with potential role in obesity and diabetes. The purpose of the present study was to assess irisin levels and its association with insulin resistance and oxidative stress markers in premenopausal normal-weight and obese women. Ten obese (mean body mass index, 32.65±3.04 kg m(-2)) and 10 normal-weight (23.00±2.23 kg m(-2)) premenopausal women were involved in the present study. Anthropometric, and body composition parameters, blood chemistry, oxidative stress markers, and irisin concentrations of different groups were measured...
September 2016: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
Yaprak Engin-Üstün, Emel Kıyak Çağlayan, Ayşe Yeşim Göçmen, Muhammed Fevzi Polat
OBJECTIVES: The objective of this study was to describe the levels of chemerin, irisin and apolipoprotein M (apoM) in women with postmenopausal osteoporosis. METHODS: The study included 88 women with postmenopausal osteoporosis. Based on World Health Organization criteria, women with a T-score of ≤ -2.5 were defined as osteoporotic. In this case-control study, postmenopausal women with T-score > -1 were selected as controls (n = 88) and case-matched in a 1:1 ratio based on age (within 2 years) and body mass index (BMI) (within 1...
August 2016: Journal of Menopausal Medicine
Agnieszka Adamska, Monika Karczewska-Kupczewska, Agnieszka Lebkowska, Robert Milewski, Maria Górska, Elzbieta Otziomek, Agnieszka Nikolajuk, Slawomir Wolczynski, Irina Kowalska
Irisin is an adipokine/myokine which could be connected with insulin sensitivity. Polycystic ovary syndrome (PCOS) is characterized by oligo- or anovulation, polycystic ovary, hyperandrogenism and insulin resistance. The aim of the present study was to determine the relationship between serum irisin concentration and insulin sensitivity (Mffm) as well as the effect of insulin infusion on circulating irisin levels in PCOS women as compared with healthy controls. Seventy seven women were enrolled in the study - 57 with PCOS and 20 healthy controls matched for BMI and age...
September 8, 2016: Endocrine Journal
Claudio Ferrante, Giustino Orlando, Lucia Recinella, Sheila Leone, Annalisa Chiavaroli, Chiara Di Nisio, Rugia Shohreh, Fabio Manippa, Adriana Ricciuti, Michele Vacca, Luigi Brunetti
Irisin, the soluble secreted form of fibronectin type III domain containing 5 (FNDC5)-cleaved product, is a recently identified adipo-myokine that has been indicated as a possible link between physical exercise and energetic homeostasis. The co-localization of irisin with neuropeptide Y in hypothalamic sections of paraventricular nucleus, which receives NPY/AgRP projections from the arcuate nucleus, suggests a possible role of irisin in the central regulation of energy balance. In this context, in the present work we studied the effects of intra-hypothalamic irisin (1μl, 50-200nmol/l) administration on feeding and orexigenic [agouti-related peptide (AgRP), neuropeptide Y (NPY) and orexin-A] and anorexigenic [cocaine and amphetamine-regulated transcript (CART) and proopiomelanocortin (POMC)] peptides in male Sprague-Dawley rats...
September 8, 2016: European Journal of Pharmacology
Ana Rodríguez-Carmona, Miguel Pérez Fontán, Susana Sangiao Alvarellos, Teresa García Falcón, María Lara Pena Bello, Andrés López Muñiz, Fernando Cordido
BACKGROUND: Irisin is an adipomyokine with claimed anti-obesity and anti-diabetic effects. This hormone has been insufficiently studied in patients with advanced chronic kidney disease (CKD). OBJECTIVE: To perform an exploratory analysis of serum irisin levels in patients undergoing different CKD treatments. METHOD: Following a cross-sectional design, we estimated serum levels of irisin in 95 patients with CKD managed conservatively (advanced CKD), with peritoneal dialysis (PD) or with haemodialysis, and compared our findings with a control group of 40 healthy individuals...
September 2016: Nefrología: Publicación Oficial de la Sociedad Española Nefrologia
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