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https://www.readbyqxmd.com/read/29332162/roles-of-irisin-in-the-linkage-from-muscle-to-bone-during-mechanical-unloading-in-mice
#1
Naoyuki Kawao, Akihiro Moritake, Kohei Tatsumi, Hiroshi Kaji
Mechanical unloading induces disuse muscle atrophy and bone loss, but the details in mechanism involved in those pathophysiological conditions are not fully understood. Interaction between muscle and bone has been recently noted. Here, we investigated the roles of humoral factors linking muscle to bone during mechanical unloading using mice with hindlimb unloading (HU) and sciatic neurectomy (SNX). HU and SNX reduced muscle volume surrounding the tibia, tissue weights of soleus and gastrocnemius muscle, and trabecular bone mineral density (BMD) in the tibia of mice...
January 13, 2018: Calcified Tissue International
https://www.readbyqxmd.com/read/29326420/fasting-and-glucose-induced-thermogenesis-in-response-to-three-ambient-temperatures-a-randomized-crossover-trial-in-the-metabolic-syndrome
#2
K Pathak, R J Woodman, A P James, M J Soares
BACKGROUND/OBJECTIVES: Cold exposure increases thermogenesis and could improve insulin sensitivity. We hypothesized a blunted response in the metabolic syndrome (MetS). SUBJECTS/METHODS: Twenty older adults 59 ± 10.4 years (with MetS, MetS+, n = 9; without MetS, MetS-, n = 11) completed a randomized crossover design of 3.5 h exposures to 20, 25 and 27 °C on three visits. After an hour's rest at the desired temperature, resting metabolic rate (RMR), respiratory quotient (RQ), forearm to fingertip gradients (FFG), and in the ear temperature (IET) were measured over 30 min...
January 11, 2018: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29325128/relationship-between-twelve-adipocytokines-and-distinct-components-of-the-metabolic-syndrome
#3
Thomas Ebert, Claudia Gebhardt, Markus Scholz, Tobias Wohland, Dorit Schleinitz, Mathias Fasshauer, Matthias Blüher, Michael Stumvoll, Peter Kovacs, Anke Tönjes
Objective: Adipose tissue-derived signals potentially link obesity and adipose tissue dysfunction with metabolic and cardiovascular diseases. Although some adipocytokines have been closely related to metabolic and cardiovascular traits, it remains open which adipocytokine or adipocytokine cluster serve as meaningful marker of metabolic syndrome (MS) components. Therefore, this study investigates the associations of twelve adipocytokines with components of the MS to identify the most relevant cytokines potentially related to specific metabolic profiles...
January 9, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29322691/raspberry-supplementation-improves-insulin-signaling-and-promotes-brown-like-adipocyte-development-in-white-adipose-tissue-of-obese-mice
#4
Tong Xing, Yifei Kang, Xinglian Xu, Bo Wang, Min Du, Mei-Jun Zhu
SCOPE: Excessive lipid accumulation in white adipose tissue (WAT) leads to chronic inflammation and metabolic dysfunction. Raspberry (RB) contains high amount of polyphenolics and dietary fibers. The objective of the study is to evaluate effects of RB supplementation on WAT morphology, inflammation and insulin signaling in high fat diet (HFD)-induced obese mice, and further explore the underlying mechanisms. METHODS AND RESULTS: C57BL/6J mice were fed with a control diet or a HFD supplemented with 0 or 5% freeze dried RB for 12 weeks...
January 10, 2018: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29315430/swimming-training-attenuates-allodynia-and-hyperalgesia-induced-by-peripheral-nerve-injury-in-an-adult-male-rat-neuropathic-model-effects-on-irisin-and-gad65
#5
Babak Farzad, Hamid Rajabi, Reza Gharakhanlou, David J Allison, Parisa Hayat, Seyed Behnamedin Jameie
Objectives: The analgesic mechanism of long-lasting exercise on neuropathic pain is not well understood. This study explored the effects of swimming training on neuropathic pain and the expression of irisin, GAD65, and P2X3 after chronic constriction injury (CCI) of the sciatic nerve. Methods: Thirty-five male rats were randomly assigned to one of the following five groups: 1) no CCI or swimming (control); 2) swimming without CCI (SW); 3) swimming with CCI (CCISW); 4) CCI without swimming (CCI); and 5) sham CCI surgery (sham CCI)...
January 5, 2018: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/29307776/body-fat-mass-lean-body-mass-and-associated-biomarkers-as-determinants-of-bone-mineral-density-in-children-6-8years-of-age-the-physical-activity-and-nutrition-in-children-panic-study
#6
Sonja Soininen, Virpi Sidoroff, Virpi Lindi, Anitta Mahonen, Liisa Kröger, Heikki Kröger, Jarmo Jääskeläinen, Mustafa Atalay, David E Laaksonen, Tomi Laitinen, Timo A Lakka
Lean body mass (LM) has been positively associated with bone mineral density (BMD) in children and adolescents, but the relationship between body fat mass (FM) and BMD remains controversial. Several biomarkers secreted by adipose tissue, skeletal muscle, or bone may affect bone metabolism and BMD. We investigated the associations of LM, FM, and such biomarkers with BMD in children. We studied a population sample of 472 prepubertal Finnish children (227 girls, 245 boys) aged 6-8years. We assessed BMD, LM, and FM using whole-body dual-energy x-ray absorptiometry and analysed several biomarkers from fasting blood samples...
January 4, 2018: Bone
https://www.readbyqxmd.com/read/29277835/serum-levels-of-visfatin-omentin-and-irisin-in-patients-with-end-stage-lung-disease-before-and-after-lung-transplantation
#7
Marek Ochman, Marcin Maruszewski, Jacek Wojarski, Sławomir Żegleń, Wojtek Karolak, Anita Stanjek-Cichoracka, Piotr Przybyłowski, Marian Zembala, Michał Kukla
BACKGROUND The aim of this study was to investigate serum concentrations of visfatin, irisin, and omentin in patients with end-stage lung diseases (ESLD) before and after lung transplantation (LTx) and to find relationship between adipokines levels and clinical outcomes. MATERIAL AND METHODS Fourteen consecutive lung transplant recipients (six males and seven females; age 32.0±14.2 years; body mass index (BMI) 21.8±5.3 kg/m²) who underwent lung transplantation with initial diagnosis of respiratory failure due to cystic fibrosis (CF), chronic obstructive pulmonary disease (COPD), idiopathic pulmonary fibrosis (IPF) were included...
December 26, 2017: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/29248911/irisin-and-volume-overload-are-associated-with-protein-energy-wasting-in-peritoneal-dialysis-patients
#8
Si-Jia Zhou, Qing-Feng Han, Ai-Hua Zhang, Wen Tang, Ling-Hua Sun
BACKGROUND/AIMS: Protein energy wasting (PEW) is a common medical phenomenon that is observed in maintenance dialysis patients. PEW also increases morbidity and mortality of these patients. Its pathogenesis is unclear. We hypothesize that serum irisin levels and volume overload may induce PEW in peritoneal dialysis (PD) patients. The aim of this study is to measure serum irisin levels, evaluate volume status of PD patients, and study their correlations with PEW in PD patients. METHODS: This study is a cross-sectional study with 160 PD patients from the PD center of Peking University Third Hospital and 35 healthy control subjects...
December 14, 2017: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/29236301/synergistic-effect-of-carnosine-on-browning-of-adipose-tissue-in-exercised-obese-rats-a-focus-on-circulating-irisin-levels
#9
Mona F Schaalan, Basma K Ramadan, Azza H Abd Elwahab
BACKGROUND: The recent appreciation of the energy burning capacity of brown adipose tissue turns it to an attractive target as anti-obesity therapy. OBJECTIVE: to evaluate the effect of L-carnosine on browning of white adipose tissue in exercised obese rats. METHODS: Sixty adult male Wistar albino rats between 7-8 weeks-old weighing 130-150 g were allocated into six groups;(i) normal control rats fed normal diet; (ii) high fat diet (HFD)-induced obese rats, (iii) normal control rats fed normal diet and injected with L-carnosine (250mg/kg), (iv) HFD-rats injected with L-carnosine (250mg/kg),(v): HFD-rats subjected to exercise training; (vi): HFD- rats subjected to exercise training and L-carnosine together...
December 13, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29228710/irisin-treatment-improves-healing-of-dystrophic-skeletal-muscle
#10
Musarrat Maisha Reza, Chu Ming Sim, Nathiya Subramaniyam, Xiaojia Ge, Mridula Sharma, Ravi Kambadur, Craig McFarlane
Background: Irisin is an exercise induced myokine that is shown to promote browning of adipose tissue and hence, increase energy expenditure. Furthermore, our unpublished results indicate that Irisin improves myogenic differentiation and induces skeletal muscle hypertrophy. Since exercise induced skeletal muscle hypertrophy improves muscle strength, we wanted to investigate if ectopic injection of Irisin peptide improves skeletal muscle function in a mouse model of muscular dystrophy...
November 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29226153/the-exercise-induced-irisin-is-associated-with-improved-levels-of-glucose-homeostasis-markers-in-pregnant-women-participating-in-8-week-prenatal-group-fitness-program-a-pilot-study
#11
Anna Szumilewicz, Aneta Worska, Magdalena Piernicka, Agnieszka Kuchta, Jakub Kortas, Zbigniew Jastrzębski, Łukasz Radzimiński, Joanna Jaworska, Katarzyna Micielska, Ewa Ziemann
Background: Both exercise and pregnancy influence serum irisin concentration. Aim: To determine how the interaction of pregnancy and exercise affects irisin level and whether various patterns of exercise adherence had different effect on irisin concentration. Methods: It was a one-group pretest-posttest study among 9 Caucasian nulliparous healthy women in normal pregnancy (age 23 ± 3 years, 21 ± 2 weeks of gestation; mean ± SD) who participated in 8-week group fitness program...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29219062/assesment-of-irisin-adiponectin-and-leptin-levels-in-patients-with-schizophrenia
#12
Gamze Erzin, Canan Topcuoglu, Vahap Ozan Kotan, Senol Bayram, Kostas Fountoulakis
BACKGROUND: The patients with schizophrenia are at increased risk for problems regarding metabolic parameters due to their lifestyle and antipsychotic treatment. OBJECTIVE: In this study, we aimed to evaluate the levels of adiponectin, leptin, irisin in patients with schizophrenia who were nondiabetic, nonobese and under antipsychotic treatment. METHOD: 5 ml sample of venous blood was collected from each participant. Blood cells were separated from the serum...
December 7, 2017: Endocrine, Metabolic & Immune Disorders Drug Targets
https://www.readbyqxmd.com/read/29217995/the-alteration-of-irisin-brain-derived-neurotrophic-factor-axis-parallels-severity-of-distress-disorder-in-bronchial-asthma-patients
#13
Magdolna E Szilasi, Krisztian Pak, Laszlo Kardos, Viktoria E Varga, Ildiko Seres, Angela Mikaczo, Andrea Fodor, Maria Szilasi, Gabor Tajti, Csaba Papp, Rudolf Gesztelyi, Judit Zsuga
Distress disorder (a collective term for generalized anxiety disorder and major depressive disorder) is a well-known co-morbidity of bronchial asthma. The irisin-brain-derived neurotrophic factor (BDNF) axis is a pathway that influences several neurobehavioral mechanisms involved in the pathogenesis of distress disorder. Thus, the aim of the present study was to quantify the serum irisin and BDNF concentrations in order to investigate the possible link between the irisin/BDNF axis and distress disorder in an asthma patient cohort...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29217128/circulating-irisin-in-patients-with-polycystic-ovary-syndrome-a-meta-analysis
#14
Xue Cai, Shanhu Qiu, Ling Li, Martina Zügel, Jürgen Michael Steinacker, Uwe Schumann
There is growing interest in exploring circulating (plasma/serum) irisin in polycystic ovary syndrome (PCOS) patients. This meta-analysis aimed to summarize the evidence assessing circulating irisin changes in this population. A systematic search was conducted in three databases: PubMed, Cochrane Library and Web of Science, for studies reporting irisin in PCOS patients compared with healthy controls or stratified by body mass index (BMI), or assessing irisin response to hyperinsulinemia. Effect sizes (Cohen's d with 95% confidence intervals [CI]) were calculated using random-effects models...
November 22, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/29210643/adipokines-and-myokines-a-pivotal-role-in-metabolic-and-cardiovascular-disorders
#15
Hye Soo Chung, Kyung Mook Choi
Obesity induces an imbalance in the expression and secretion of several cytokines, which contributes to the development of metabolic and cardiovascular disorders. On the contrary, skeletal muscle is known to have a role in reversing the detrimental impact of obesity. It has been established that adipose tissue acts as an endocrine organ that secretes proinflammatory and anti-inflammatory adipokines. Similarly, skeletal muscle produces secretory molecules, called myokines, from contracting muscle fibers. Myokines were recently recognized as beneficial modulators of obesity, metabolic syndrome, and type 2 diabetes...
December 5, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29208692/exercise-induced-irisin-release-as-a-determinant-of-the-metabolic-response-to-exercise-training-in-obese-youth-the-exit-trial
#16
Devin R Blizzard LeBlanc, Brittany V Rioux, Cody Pelech, Teri L Moffatt, Dustin E Kimber, Todd A Duhamel, Vernon W Dolinsky, Jonathan M McGavock, Martin Sénéchal
The mechanisms underlying the metabolic improvements following aerobic exercise training remain poorly understood. The primary aim of this study was to determine if an adipomyokine, irisin, responded to acute exercise was associated with the metabolic adaptations to chronic aerobic exercise in obese youth. The acute response to exercise was assessed in 11 obese youth following 45-min acute bouts of aerobic (AE) and resistance exercise (RE). The irisin area under the curve (pre-exercise, 15, 30, and 45 min) during these AE sessions were the main exposure variables...
December 2017: Physiological Reports
https://www.readbyqxmd.com/read/29197093/the-association-between-irisin-and-muscle-metabolism-in-different-thyroid-disorders
#17
Ariadna Zybek-Kocik, Nadia Sawicka-Gutaj, Ewelina Szczepanek-Parulska, Mirosław Andrusiewicz, Joanna Waligórska-Stachura, Piotr Białas, Tomasz Krauze, Przemysław Guzik, Jerzy Skrobisz, Marek Ruchała
BACKGROUND: Irisin is a new adipo-myokine, encoded by the FNDC5 gene. Currently, there is a discussion regarding the relation between thyroid function and irisin concentration. This prospective study assesses the influence of thyrometabolic changes on serum irisin concentration in association with altered muscle metabolism. This is performed on a large cohort of patients affected by severe hypo- or hyperthyroidism, as well as by the expression of the FNDC5 gene in thyroid tissue affected by different pathologies...
December 2, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/29187642/irisin-protects-mitochondria-function-during-pulmonary-ischemia-reperfusion-injury
#18
Ken Chen, Zaicheng Xu, Yukai Liu, Zhen Wang, Yu Li, Xuefei Xu, Caiyu Chen, Tianyang Xia, Qiao Liao, Yonggang Yao, Cindy Zeng, Duofen He, Yongjian Yang, Tao Tan, Jianxun Yi, Jingsong Zhou, Hua Zhu, Jianjie Ma, Chunyu Zeng
Limb remote ischemic preconditioning (RIPC) is an effective means of protection against ischemia/reperfusion (IR)-induced injury to multiple organs. Many studies are focused on identifying endocrine mechanisms that underlie the cross-talk between muscle and RIPC-mediated organ protection. We report that RIPC releases irisin, a myokine derived from the extracellular portion of fibronectin domain-containing 5 protein (FNDC5) in skeletal muscle, to protect against injury to the lung. Human patients with neonatal respiratory distress syndrome show reduced concentrations of irisin in the serum and increased irisin concentrations in the bronchoalveolar lavage fluid, suggesting transfer of irisin from circulation to the lung under physiologic stress...
November 29, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/29184538/circulating-irisin-is-reduced-in-male-patients-with-type-1-and-type-2-myotonic-dystrophies
#19
Elena Dozio, Elena Passeri, Rosanna Cardani, Stefano Benedini, Carmen Aresta, Rea Valaperta, Massimiliano Corsi Romanelli, Giovanni Meola, Valeria Sansone, Sabrina Corbetta
Context: Myotonic dystrophies (DM) are dominantly inherited muscle disorders characterized by myotonia, muscle weakness, and wasting. The reasons for sarcopenia in DMs are uncleared and multiple factors are involved. Irisin, a positive hormone regulator of muscle growth and bone, may play a role. Objectives: To investigate (1) circulating irisin in a series of DM1 and DM2 male patients compared with healthy controls and (2) the relationships between irisin and anthropometric, metabolic and hormonal parameters...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29182513/both-hypothyroidism-and-hyperthyroidism-increase-plasma-irisin-levels-in-rats
#20
Emine Atici, Rasim Mogulkoc, Abdulkerim Kasim Baltaci, Esma Menevse
Background A recently discovered hormone, irisin is accepted to be significantly involved in the regulation of body weight. Thyroid functions may be, directly or indirectly, associated with irisin. Aim The aim of the present study is to determine the effect of experimental thyroid dysfunction on irisin levels in rats. Methods The study registered 40 adult male Sprague-Dawley rats, which were allocated to groups as follows: 1. Control; 2. Hypothyroidism induced by injection of 10 mg/kg/day intraperitoneal propylthiouracil (PTU) for 3 weeks; 3...
November 28, 2017: Hormone Molecular Biology and Clinical Investigation
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