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https://www.readbyqxmd.com/read/28886439/chronic-high-sucrose-diet-increases-fibroblast-growth-factor-21-production-and-energy-expenditure-in-mice
#1
Ryuya Maekawa, Yusuke Seino, Hidetada Ogata, Masatoshi Murase, Atsushi Iida, Kaori Hosokawa, Erina Joo, Norio Harada, Shin Tsunekawa, Yoji Hamada, Yutaka Oiso, Nobuya Inagaki, Yoshitaka Hayashi, Hiroshi Arima
Excess carbohydrate intake causes obesity in humans. On the other hand, acute administration of fructose, glucose or sucrose in experimental animals has been shown to increase the plasma concentration of anti-obesity hormones such as glucagon-like peptide 1 (GLP-1) and Fibroblast growth factor 21 (FGF21), which contribute to reducing body weight. However, the secretion and action of GLP-1 and FGF21 in mice chronically fed a high-sucrose diet has not been investigated. To address the role of anti-obesity hormones in response to increased sucrose intake, we analyzed mice fed a high-sucrose diet, a high-starch diet or a normal diet for 15 weeks...
July 25, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28880480/monoacylglycerol-signalling-and-abhd6-in-health-and-disease
#2
REVIEW
Pegah Poursharifi, Sri Ramachandra Murthy Madiraju, Marc Prentki
Lipid metabolism dysregulation underlies chronic pathologies such as obesity, diabetes and cancer. Besides their role in structure and energy storage, lipids are also important signalling molecules regulating multiple biological functions. Thus, understanding the precise lipid metabolism enzymatic steps that are altered in some pathological conditions is helpful for designing better treatment strategies. Several monoacylglycerol (MAG) species are only recently being recognized as signalling lipid molecules in different tissues...
September 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28872979/bone-marrow-adipocytes
#3
Mark C Horowitz, Ryan Berry, Brandon Holtrup, Zachary Sebo, Tracy Nelson, Jackie A Fretz, Dieter Lindskog, Jennifer L Kaplan, Gene Ables, Matthew S Rodeheffer, Clifford J Rosen
Adipocytes were identified in human bone marrow more than a century ago, yet until recently little has been known about their origin, development, function or interactions with other cells in the bone marrow. Little functional significance has been attributed to these cells, a paradigm that still persists today. However, we now know that marrow adipose tissue increases with age and in response to a variety of physiologic induction signals. Bone marrow adipocytes have recently been shown to influence other cell populations within the marrow and can affect whole body metabolism by the secretion of a defined set of adipokines...
August 24, 2017: Adipocyte
https://www.readbyqxmd.com/read/28859876/genetics-based-manipulation-of-adipose-tissue-sympathetic-innervation
#4
REVIEW
Marie François, Emily Qualls-Creekmore, Hans-Rudolf Berthoud, Heike Münzberg, Sangho Yu
There is renewed interest in leveraging the thermogenic capacity of brown adipose tissue (BAT) and browning of white adipose tissue (WAT) to improve energy balance and prevent obesity. In addition to these effects on energy expenditure, both BAT and WAT secrete large numbers of hormones and cytokines that play important roles in maintaining metabolic health. Both BAT and WAT are densely innervated by the sympathetic nervous system (SNS) and this innervation is crucial for BAT thermogenesis and WAT browning, making it a potentially interesting target for manipulating energy balance and treatment of obesity and metabolic disease...
August 30, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28856803/can-fsh-influence-longevity
#5
Andrzej Bartke
It was recently reported that the extragonadal actions of follicle-stimulating hormone (FSH) include regulation of brown and white adipose tissue function and thermogenesis. Based on these findings and on our evidence for reduced FSH levels and enhanced thermogenesis in long-lived growth hormone (GH)-deficient mice and GH-resistant mice, we suggest that FSH may have a role in the control of aging and longevity. We speculate that alterations in FSH secretion may represent one of the mechanisms of trade-offs between reproduction and aging...
October 2017: Aging Cell
https://www.readbyqxmd.com/read/28842503/the-c-terminal-fibrinogen-like-domain-of-angiopoietin-like-4-stimulates-adipose-tissue-lipolysis-and-promotes-energy-expenditure
#6
Allison E McQueen, Deepthi Kanamaluru, Kimberly Yan, Nora E Gray, Leslie Wu, Mei-Lan Li, Anthony Chang, Adeeba Hasan, Daniel Stifler, Suneil Koliwad, Jen-Chywan Wang
Angiopoietin-like 4 (Angptl4) is a circulating protein secreted by white and brown adipose tissues and the liver. Structurally, Angptl4 contains an N-terminal coiled-coil domain (CCD) connected to a C-terminal fibrinogen-like domain (FLD) via a cleavable linker, and both full-length Angptl4 and its individual domains circulate in the bloodstream. Angptl4 inhibits extracellular lipoprotein lipase (LPL) activity and stimulates the lipolysis of triacylglycerol stored by adipocytes in the white adipose tissue (WAT)...
August 24, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28827783/ccdc3-a-new-p63-target-involved-in-regulation-of-liver-lipid-metabolism
#7
Wenjuan Liao, Hongbing Liu, Yiwei Zhang, Ji Hoon Jung, Jiaxiang Chen, Xiaohua Su, Yeong C Kim, Elsa R Flores, San Ming Wang, Malwina Czarny-Ratajczak, Wen Li, Shelya X Zeng, Hua Lu
TAp63, a member of the p53 family, has been shown to regulate energy metabolism. Here, we report coiled coil domain-containing 3 (CCDC3) as a new TAp63 target. TAp63, but not ΔNp63, p53 or p73, upregulates CCDC3 expression by directly binding to its enhancer region. The CCDC3 expression is markedly reduced in TAp63-null mouse embryonic fibroblasts and brown adipose tissues and by tumor necrosis factor alpha that reduces p63 transcriptional activity, but induced by metformin, an anti-diabetic drug that activates p63...
August 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28804022/anti-obesity-and-anti-diabetic-effects-of-nitrate-and-nitrite
#8
REVIEW
Asghar Ghasemi, Sajad Jeddi
Prevalence of obesity is increasing worldwide and type 2 diabetes to date is the most devastating complication of obesity. Decreased nitric oxide bioavailability is a feature of obesity and diabetes that links these two pathologies. Nitric oxide is synthesized both by nitric oxide synthase enzymes from l-arginine and nitric oxide synthase-independent from nitrate/nitrite. Nitric oxide production from nitrate/nitrite could potentially be used for nutrition-based therapy in obesity and diabetes. Nitric oxide deficiency also contributes to pathogeneses of cardiovascular disease and hypertension, which are associated with obesity and diabetes...
August 10, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28760584/the-endothelial-cell-secretome-as-a-novel-treatment-to-prime-adipose-derived-stem-cells-for-improved-wound-healing-in-diabetes
#9
Marc W Fromer, Shaohua Chang, Ashleigh L R Hagaman, Kiavash R Koko, Ryan S Nolan, Ping Zhang, Spencer A Brown, Jeffrey P Carpenter, Francis J Caputo
BACKGROUND: Chronic wounds are a common surgical problem exacerbated by diabetes and ischemia. Although adipose-derived stem cells (ASCs) have shown promise as a wound healing therapy, their function and proliferation are hindered in diabetes. This study examines the ability of the human umbilical vein endothelial cell (HUVEC) secretome to reverse the deleterious effects of high glucose concentrations on ASCs through priming, thereby enhancing their ability to participate in angiogenesis and wound healing...
July 28, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28752050/nrg4-promotes-fuel-oxidation-and-a-healthy-adipokine-profile-to-ameliorate-diet-induced-metabolic-disorders
#10
Zhimin Chen, Guo-Xiao Wang, Sara L Ma, Dae Young Jung, Hyekyung Ha, Tariq Altamimi, Xu-Yun Zhao, Liang Guo, Peng Zhang, Chun-Rui Hu, Ji-Xin Cheng, Gary D Lopaschuk, Jason K Kim, Jiandie D Lin
OBJECTIVE: Brown and white adipose tissue exerts pleiotropic effects on systemic energy metabolism in part by releasing endocrine factors. Neuregulin 4 (Nrg4) was recently identified as a brown fat-enriched secreted factor that ameliorates diet-induced metabolic disorders, including insulin resistance and hepatic steatosis. However, the physiological mechanisms through which Nrg4 regulates energy balance and glucose and lipid metabolism remain incompletely understood. The aims of the current study were: i) to investigate the regulation of adipose Nrg4 expression during obesity and the physiological signals involved, ii) to elucidate the mechanisms underlying Nrg4 regulation of energy balance and glucose and lipid metabolism, and iii) to explore whether Nrg4 regulates adipose tissue secretome gene expression and adipokine secretion...
August 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28732776/rad-gtpase-is-essential-for-the-regulation-of-bone-density-and-bone-marrow-adipose-tissue-in-mice
#11
Catherine N Withers, Drew M Brown, Innocent Byiringiro, Matthew R Allen, Keith W Condon, Jonathan Satin, Douglas A Andres
The small GTP-binding protein Rad (RRAD, Ras associated with diabetes) is the founding member of the RGK (Rad, Rem, Rem2, and Gem/Kir) family that regulates cardiac voltage-gated Ca(2+) channel function. However, its cellular and physiological functions outside of the heart remain to be elucidated. Here we report that Rad GTPase function is required for normal bone homeostasis in mice, as Rad deletion results in significantly lower bone mass and higher bone marrow adipose tissue (BMAT) levels. Dynamic histomorphometry in vivo and primary calvarial osteoblast assays in vitro demonstrate that bone formation and osteoblast mineralization rates are depressed, while in vitro osteoclast differentiation is increased, in the absence of Rad...
July 18, 2017: Bone
https://www.readbyqxmd.com/read/28721439/effects-of-insulin-and-exercise-training-on-fgf21-its-receptors-and-target-genes-in-obesity-and-type-2-diabetes
#12
Rikke Kruse, Sara G Vienberg, Birgitte F Vind, Birgitte Andersen, Kurt Højlund
AIMS/HYPOTHESIS: Pharmacological doses of FGF21 improve glucose tolerance, lipid metabolism and energy expenditure in rodents. Induced expression and secretion of FGF21 from muscle may increase browning of white adipose tissue (WAT) in a myokine-like manner. Recent studies have reported that insulin and exercise increase FGF21 in plasma. Obesity and type 2 diabetes are potentially FGF21-resistant states, but to what extent FGF21 responses to insulin and exercise training are preserved, and whether FGF21, its receptors and target genes are altered, remains to be established...
July 18, 2017: Diabetologia
https://www.readbyqxmd.com/read/28709749/the-brown-fat-secreted-adipokine-neuregulin-4-is-decreased-in-gestational-diabetes-mellitus
#13
S Kralisch, A Hoffmann, J Kratzsch, M Blüher, M Stumvoll, M Fasshauer, T Ebert
AIMS: Neuregulin 4 has recently been recognized as a novel adipokine secreted by brown adipose tissue (BAT), with beneficial effects on murine insulin resistance and hepatic steatosis. Yet, thus far, neither regulation of neuregulin 4 in gestational diabetes mellitus (GDM) nor its longitudinal changes in the peripartum period have been elucidated. METHODS: Circulating neuregulin 4 levels were measured by ELISA in 74 women with GDM and 74 healthy, gestational-age-matched controls...
July 11, 2017: Diabetes & Metabolism
https://www.readbyqxmd.com/read/28694154/short-photoperiod-reverses-obesity-in-siberian-hamsters-via-sympathetically-induced-lipolysis-and-browning-in-adipose-tissue
#14
REVIEW
Vitaly Ryu, Eleen Zarebidaki, H Elliott Albers, Bingzhong Xue, Timothy J Bartness
Changes in photoperiod length are transduced into neuroendocrine signals by melatonin (MEL) secreted by the pineal gland triggering seasonally adaptive responses in many animal species. Siberian hamsters, transferred from a long-day 'summer-like' photoperiod (LD) to a short-day 'winter-like' photoperiod (SD), exhibit a naturally-occurring reversal in obesity. Photoperiod-induced changes in adiposity are mediated by the duration of MEL secretion and can be mimicked by exogenously administered MEL into animals housed in LD...
July 7, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28662501/cold-exposure-differentially-stimulates-angiogenesis-in-bat-and-wat-of-mice-implication-in-adrenergic-activation
#15
Xiao Luo, Ru Jia, Xiao-Qin Luo, Guan Wang, Qiang-Ling Zhang, Hu Qiao, Nan Wang, Jian-Qun Yan
BACKGROUND/AIMS: To characterize the temporal profile of cold-induced angiogenesis in brown and white adipose tissues of mice in vivo and the temporal changes of angiogenic factors in primary mice brown (BA) and white adipocytes (WA) treated with β3-adrenoceptor agonist (CL316,243) in vitro. METHODS: 8-week old male C57BL/6J mice were individually housed in conventional cages under cold exposure (4°C) for 1, 2, 3, 4 and 5 days. Interscapular brown adipose tissue (iBAT), inguinal subcutaneous (sWAT) and epididymal white adipose tissues (eWAT) were harvested for immunohistochemical and gene expression analysis...
June 27, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28656459/involvement-of-thermosensitive-trp-channels-in-energy-metabolism
#16
REVIEW
Kunitoshi Uchida, Katsuya Dezaki, Takeshi Yoneshiro, Tatsuo Watanabe, Jun Yamazaki, Masayuki Saito, Toshihiko Yada, Makoto Tominaga, Yusaku Iwasaki
To date, 11 thermosensitive transient receptor potential (thermo-TRP) channels have been identified. Recent studies have characterized the mechanism of thermosensing by thermo-TRPs and the physiological role of thermo-TRPs in energy metabolism. In this review, we highlight the role of various thermo-TRPs in energy metabolism and hormone secretion. In the pancreas, TRPM2 and other TRPs regulate insulin secretion. TRPV2 expressed in brown adipocytes contributes to differentiation and/or thermogenesis. Sensory nerves that express TRPV1 promote increased energy expenditure by activating sympathetic nerves and adrenaline secretion...
September 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28614774/new-insight-into-the-direct-anti-inflammatory-activity-of-a-myokine-irisin-against-proinflammatory-activation-of-adipocytes-implication-for-exercise-in-obesity
#17
A I Mazur-Bialy, J Bilski, E Pochec, T Brzozowski
A biological activity of myokine irisin, has been intensively investigated in the context of a browning process occurring in white adipose tissue, but its role as a modulator of immune response has been little studied. The aim of our study was to determine the impact of irisin (0 - 100 nM) on pro-inflammatory activation of adipocyte 3T3 L1 cell line. Irisin reduced in a concentration-dependent manner the expression and activity of major proinflammatory cytokines, e.g. tumor necrosis factor-alpha (TNF-α) and interleukin 6 (IL-6) expression and their secretion into cell medium...
April 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28580279/brown-adipose-tissue-bat-specific-vaspin-expression-is-increased-after-obesogenic-diets-and-cold-exposure-and-linked-to-acute-changes-in-dna-methylation
#18
Juliane Weiner, Kerstin Rohde, Kerstin Krause, Konstanze Zieger, Nora Klöting, Susan Kralisch, Peter Kovacs, Michael Stumvoll, Matthias Blüher, Yvonne Böttcher, John T Heiker
OBJECTIVE: Several studies have demonstrated anti-diabetic and anti-obesogenic properties of visceral adipose tissue-derived serine protease inhibitor (vaspin) and so evoked its potential use for treatment of obesity-related diseases. The aim of the study was to unravel physiological regulators of vaspin expression and secretion with a particular focus on its role in brown adipose tissue (BAT) biology. METHODS: We analyzed the effects of obesogenic diets and cold exposure on vaspin expression in liver and white and brown adipose tissue (AT) and plasma levels...
June 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28579235/haematopoietic-tlr4-deletion-attenuates-perivascular-brown-adipose-tissue-inflammation-in-atherosclerotic-mice
#19
Penghao Liu, Gaojian Huang, Zhiyong Cao, Qihai Xie, Tong Wei, Chenglin Huang, Qun Li, Mengwei Sun, Weili Shen, Pingjin Gao
AIMS: To investigate whether haematopoietic TLR4 deletion attenuates perivascular brown adipose tissue inflammation in atherosclerotic mice. METHODS AND RESULTS: Experiments were performed using irradiated LDL receptor-deficient (LDLR(-/-)) mice with marrow from either TLR4-deficient (TLR4(-/-)) or age-matched wild-type (WT) mice. After 12 weeks of being fed a high-cholesterol diet, TLR4(-/-)→LDLR(-/-) mice developed fewer atherosclerotic lesions in the aorta compared to WT→LDLR(-/-) mice...
June 1, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28566533/brown-adipose-tissue-is-associated-with-systemic-concentrations-of-peptides-secreted-from-the-gastrointestinal-system-and-involved-in-appetite-regulation
#20
Maria Chondronikola, Craig Porter, Ioannis Malagaris, Aikaterini A Nella, Labros S Sidossis
OBJECTIVE: Brown adipose tissue (BAT) has been proposed as a potential therapeutic target against obesity and its related metabolic conditions. Data from studies in rodents support a cross talk between BAT and other distal tissues. The relation between BAT and peptide hormones secreted from the gastrointestinal system (GI) and involved in appetite regulation is not known in humans. DESIGN: We studied 18 men during thermoneutral conditions and mild non-shivering cold exposure (CE)...
July 2017: European Journal of Endocrinology
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