keyword
MENU ▼
Read by QxMD icon Read
search

Adaptive thermogenesis

keyword
https://www.readbyqxmd.com/read/28435771/brown-adipose-tissue-bioenergetics-a-new-methodological-approach
#1
María Calderon-Dominguez, Martín Alcalá, David Sebastián, Antonio Zorzano, Marta Viana, Dolors Serra, Laura Herrero
The rediscovery of brown adipose tissue (BAT) in humans and its capacity to oxidize fat and dissipate energy as heat has put the spotlight on its potential as a therapeutic target in the treatment of several metabolic conditions including obesity and diabetes. To date the measurement of bioenergetics parameters has required the use of cultured cells or extracted mitochondria with the corresponding loss of information in the tissue context. Herein, we present a method to quantify mitochondrial bioenergetics directly in BAT...
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28414329/alternatively-activated-macrophages-do-not-synthesize-catecholamines-or-contribute-to-adipose-tissue-adaptive-thermogenesis
#2
Katrin Fischer, Henry H Ruiz, Kevin Jhun, Brian Finan, Douglas J Oberlin, Verena van der Heide, Anastasia V Kalinovich, Natasa Petrovic, Yochai Wolf, Christoffer Clemmensen, Andrew C Shin, Senad Divanovic, Frank Brombacher, Elke Glasmacher, Susanne Keipert, Martin Jastroch, Joachim Nagler, Karl-Werner Schramm, Dasa Medrikova, Gustav Collden, Stephen C Woods, Stephan Herzig, Dirk Homann, Steffen Jung, Jan Nedergaard, Barbara Cannon, Matthias H Tschöp, Timo D Müller, Christoph Buettner
Adaptive thermogenesis is the process of heat generation in response to cold stimulation. It is under the control of the sympathetic nervous system, whose chief effector is the catecholamine norepinephrine (NE). NE enhances thermogenesis through β3-adrenergic receptors to activate brown adipose tissue and by 'browning' white adipose tissue. Recent studies have reported that alternative activation of macrophages in response to interleukin (IL)-4 stimulation induces the expression of tyrosine hydroxylase (TH), a key enzyme in the catecholamine synthesis pathway, and that this activation provides an alternative source of locally produced catecholamines during the thermogenic process...
April 17, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28401293/how-low-can-you-go-an-adaptive-energetic-framework-for-interpreting-basal-metabolic-rate-variation-in-endotherms
#3
REVIEW
David L Swanson, Andrew E McKechnie, François Vézina
Adaptive explanations for both high and low body mass-independent basal metabolic rate (BMR) in endotherms are pervasive in evolutionary physiology, but arguments implying a direct adaptive benefit of high BMR are troublesome from an energetic standpoint. Here, we argue that conclusions about the adaptive benefit of BMR need to be interpreted, first and foremost, in terms of energetics, with particular attention to physiological traits on which natural selection is directly acting. We further argue from an energetic perspective that selection should always act to reduce BMR (i...
April 11, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28399393/thermogenesis-by-thada
#4
Nirmalya Chatterjee, Norbert Perrimon
THADA has been associated with cold adaptation and diabetes in humans, but the cellular and molecular basis of its function has been unknown. Moraru and colleagues (2017) report in this issue of Developmental Cell that it triggers thermogenesis by uncoupling ATP hydrolysis from calcium transport into the endoplasmic reticulum.
April 10, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28386236/metabolic-response-of-visceral-white-adipose-tissue-of-obese-mice-exposed-for-5-days-to-human-room-temperature-compared-to-mouse-thermoneutrality
#5
Inge van der Stelt, Femke Hoevenaars, Jitka Široká, Lidwien de Ronde, David Friedecký, Jaap Keijer, Evert van Schothorst
Housing of laboratory mice at room temperature (22°C) might be considered a constant cold stress, which induces a thermogenic program in brown adipose tissue (BAT). However, the early adaptive response of white adipose tissue (WAT), the fat storage organ of the body, to a change from thermoneutrality to room temperature is not known. This was investigated here for various WAT depots, focusing on epididymal WAT (eWAT), widely used as reference depot. Male adult diet-induced obese (DIO) C57BL/6JOlaHsd mice housed at thermoneutrality (29°C), were for 5 days either switched to room temperature (22°C) or remained at thermoneutrality...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28351837/cyclin-c-regulates-adipogenesis-by-stimulating-transcriptional-activity-of-ccaat-enhancer-binding-protein-alpha
#6
Ziyi Song, Alus M Xiaoli, Quanwei Zhang, Yi Zhang, Ellen S T Yang, Sven Wang, Rui Chang, Zhengdong D Zhang, Gongshe Yang, Randy Strich, Jeffrey E Pessin, Fajun Yang
Brown adipose tissue (BAT) is important for maintaining energy homeostasis and adaptive thermogenesis in rodents and humans. As disorders arising from dysregulated energy metabolism, such as obesity and metabolic diseases, have increased, so has interest in the molecular mechanisms in adipocyte biology. Using a functional screen, we identified cyclin C (CycC), a conserved subunit of the Mediator complex, as a novel regulator for brown adipocyte formation. siRNA-mediated CycC knockdown (KD) in brown preadipocytes impaired the early transcriptional program of differentiation, and genetic knockout (KO) of CycC completely blocked the differentiation process...
March 28, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28291835/adipocyte-arrestin-domain-containing-3-protein-arrdc3-regulates-uncoupling-protein-1-ucp1-expression-in-white-adipose-independently-of-canonical-changes-in-%C3%AE-adrenergic-receptor-signaling
#7
Shannon H Carroll, Ellen Zhang, Bing F Wang, Katherine B LeClair, Arifeen Rahman, David E Cohen, Jorge Plutzky, Parth Patwari, Richard T Lee
Adaptive thermogenesis and cold-induced activation of uncoupling protein 1 (Ucp1) in brown adipose tissue in rodents is well-described and attributed to sympathetic activation of β-adrenergic signaling. The arrestin domain containing protein Arrdc3 is a regulator of obesity in mice and also appears linked to obesity in humans. We generated a mouse with conditional deletion of Arrdc3, and here we present evidence that genetic ablation of Arrdc3 specifically in adipocytes results in increased Ucp1 expression in subcutaneous and parametrial adipose tissue...
2017: PloS One
https://www.readbyqxmd.com/read/28270523/id1-promotes-obesity-by-suppressing-brown-adipose-thermogenesis-and-white-adipose-browning
#8
Mallikarjun Patil, Bal Krishan Sharma, Sawsan Elattar, Judith Chang, Shweta Kapil, Jinling Yuan, Ande Satyanarayana
Obesity results from increased energy intake or defects in energy expenditure. Brown adipose tissue (BAT) is specialized for energy expenditure, a process called adaptive thermogenesis. Peroxisome proliferator activated receptor γ coactivator 1α (PGC1α) controls BAT-mediated thermogenesis by regulating the expression of Ucp1 Inhibitor of differentiation 1 (Id1) is a helix-loop-helix transcription factor that plays important roles in cell proliferation and differentiation. Here, we demonstrate a novel function of Id1 in BAT thermogenesis and programming of beige adipocytes in white adipose tissue (WAT)...
March 7, 2017: Diabetes
https://www.readbyqxmd.com/read/28255980/thyroid-dysfunction-in-obese-and-overweight-children
#9
Ewelina Witkowska-Sędek, Anna Kucharska, Małgorzata Rumińska, Beata Pyrżak
Obesity and thyroid function are closely related. Thyroid hormones are involved in the regulation of metabolism, thermogenesis, food intake, and fat oxidation. In obese children the most frequent hormonal abnormalities are slight hyperthyrotropinaemia and moderate increases in total T3 and/or fT3 concentrations. Those abnormalities are usually considered a cause of obesity, but according to recent studies, they should actually be considered an adaptation process aimed at increasing resting energy expenditure and total energy expenditure...
2017: Endokrynologia Polska
https://www.readbyqxmd.com/read/28242830/suppressed-sympathetic-outflow-to-skeletal-muscle-muscle-thermogenesis-and-activity-energy-expenditure-with-calorie-restriction
#10
Tariq I Almundarij, Chaitanya K Gavini, Colleen M Novak
During weight loss, adaptive thermogenesis occurs where energy expenditure (EE) is suppressed beyond that predicted for the smaller body size. Here, we investigated the contributions of resting and nonresting EE to the reduced total EE seen after 3 weeks of 50% calorie restriction (CR) in rats, focusing on activity-associated EE, muscle thermogenesis, and sympathetic outflow. Prolonged food restriction resulted in a 42% reduction in daily EE, through a 40% decrease in resting EE, and a 48% decline in nonresting EE These decreases in EE were significant even when the reductions in body weight and lean mass were taken into account...
February 2017: Physiological Reports
https://www.readbyqxmd.com/read/28212671/an-adaptive-variant-of-trib2-rs1057001-is-associated-with-higher-expression-levels-of-thermogenic-genes-in-human-subcutaneous-and-visceral-adipose-tissues
#11
Kazuhiro Nakayama, Sadahiko Iwamoto
BACKGROUND: An obesity-related single-nucleotide polymorphism (SNP) of the Tribbles pseudokinase 2 gene (TRIB2) was shown to have underwent adaptive evolution in the last glacial period, suggesting a selective advantage of this SNP in human populations in cold environments. In order to verify this hypothesis, the effect of the TRIB2 SNP on the expression of genes involved in adaptive thermogenesis was tested using messenger RNAs prepared from adipose tissues of Japanese adults. METHODS: Complementary DNA was prepared from subcutaneous adipose tissues (SAT) and visceral adipose tissues (VAT) obtained from 48 Japanese adults...
February 17, 2017: Journal of Physiological Anthropology
https://www.readbyqxmd.com/read/28180061/kinase-suppressor-of-ras-2-ksr2-expression-in-the-brain-regulates-energy-balance-and-glucose-homeostasis
#12
Lili Guo, Diane L Costanzo-Garvey, Deandra R Smith, Beth K Neilsen, Richard G MacDonald, Robert E Lewis
OBJECTIVE: Kinase Suppressor of Ras 2 (KSR2) is a molecular scaffold coordinating Raf/MEK/ERK signaling that is expressed at high levels in the brain. KSR2 disruption in humans and mice causes obesity and insulin resistance. Understanding the anatomical location and mechanism of KSR2 function should lead to a better understanding of physiological regulation over energy balance. METHODS: Mice bearing floxed alleles of KSR2 (KSR2(fl/fl)) were crossed with mice expressing the Cre recombinase expressed by the Nestin promoter (Nes-Cre) to produce Nes-CreKSR2(fl/fl) mice...
February 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28178562/young-and-lean-elimination-of-senescent-cells-boosts-adaptive-thermogenesis
#13
Pablo J Fernandez-Marcos, Manuel Serrano
Thermogenesis converts the chemical energy of nutrients into heat, and this is associated to improved metabolic performance. In a previous issue of Cell Metabolism, Berry et al. (2017) reported that the progenitors of thermogenic beige adipocytes lose functionality with aging, and this process can be reversed with strategies that eliminate senescent cells.
February 7, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28166943/cold-adaptive-thermogenesis-following-consumption-of-certain-pungent-spice-principles-a-validation-study
#14
Chaitanya Pandit, K R Anilakumar
Identifying a means to activate or potentiate thermogenic mechanisms through ingestion of dietary compounds have important implications in cold endurance and survival. Although many reports discuss the thermogenic potential of spices, it is surprising that none of the studies verify whether consumption of spices can improve cold endurance. In this study, we have attempted to evaluate if ingestion of certain spices can activate heat-generating mechanisms in the body such that a fall in. core body temperature (CBT) can be delayed or prevented when faced with a cold challenge...
February 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28164457/isometric-thermogenesis-at-rest-and-during-movement-a-neglected-variable-in-energy-expenditure-and-obesity-predisposition
#15
REVIEW
A G Dulloo, J L Miles-Chan, J-P Montani, Y Schutz
Isometric thermogenesis as applied to human energy expenditure refers to heat production resulting from increased muscle tension. While most physical activities consist of both dynamic and static (isometric) muscle actions, the isometric component is very often essential for the optimal performance of dynamic work given its role in coordinating posture during standing, walking and most physical activities of everyday life. Over the past 75 years, there has been sporadic interest into the relevance of isometric work to thermoregulatory thermogenesis and to adaptive thermogenesis pertaining to body-weight regulation...
February 2017: Obesity Reviews: An Official Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28161458/effect-of-mptp-on-mrna-expression-of-pgc-1%C3%AE-in-mouse-brain
#16
Rita Torok, Andras Salamon, Evelin Sumegi, Denes Zadori, Gabor Veres, Mate Fort Molnar, Laszlo Vecsei, Peter Klivenyi
The peroxisome proliferator-activated receptor-γ (PPARγ) coactivator 1α (PGC-1α) is a key regulator of mitochondrial biogenesis, respiration and adaptive thermogenesis. Besides the full-length protein (FL-PGC-1α), several other functionally active PGC-1α isoforms were identified as a result of alternative splicing (e.g., N-truncated PGC-1α; NT-PGC-1α) or alternative promoter usage (e.g., central nervous system-specific PGC-1α isoforms; CNS-PGC-1α). Achieving neuroprotection via CNS-targeted pharmacological stimulation is limited due to poor penetration of the blood brain barrier (BBB) by the proposed pharmaceutical agents, so preconditioning emerged as another option...
February 1, 2017: Brain Research
https://www.readbyqxmd.com/read/28159559/blunting-of-adaptive-thermogenesis-as-a-potential-additional-mechanism-to-promote-weight-loss-after-gastric-bypass
#17
Matthew G Browning, Charlotte Rabl, Guilherme M Campos
BACKGROUND: Adaptive thermogenesis (AT) is described as a change in resting metabolic rate (RMR) that is greater than would be predicted from changes in lean body mass (LBM) and fat mass (FM) alone during periods of energy imbalance. Whereas an AT-related downregulation of RMR has been implicated in suboptimal weight loss and weight regain after nonsurgical weight loss, defense against AT may underpin the durable weight loss after laparoscopic Roux-en-Y gastric bypass (LRYGB) and other bariatric surgeries...
November 21, 2016: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28158227/beneficial-effects-of-metformin-on-energy-metabolism-and-visceral-fat-volume-through-a-possible-mechanism-of-fatty-acid-oxidation-in-human-subjects-and-rats
#18
Ichiro Tokubuchi, Yuji Tajiri, Shimpei Iwata, Kento Hara, Nobuhiko Wada, Toshihiko Hashinaga, Hitomi Nakayama, Hiroharu Mifune, Kentaro Yamada
OBJECTIVE: Metformin is known to have a beneficial effect on body weight and body composition, although the precise mechanism has not been elucidated yet. The aim of this study is to investigate the effects of metformin on energy metabolism and anthropometric factors in both human subjects and rats. METHODS: In human studies, metformin (1500mg/day) was administered to 23 healthy subjects and 18 patients with type 2 diabetes for 2 weeks. Metabolic parameters and energy metabolism were measured during a meal tolerance test in the morning before and after the treatment of metformin...
2017: PloS One
https://www.readbyqxmd.com/read/28145515/role-of-thermal-physiology-and-bioenergetics-on-adaptation-in-tree-shrew-tupaia-belangeri-the-experiment-test
#19
Lin Zhang, Fang Yang, Zheng-Kun Wang, Wan-Long Zhu
Ambient conditions, as temperature and photoperiod, play a key role in animals' physiology and behaviors. To test the hypothesis that the maximum thermal physiological and bioenergetics tolerances are induced by extreme environments in Tupaia belangeri. We integrated the acclimatized and acclimated data in several physiological, hormonal, and biochemical markers of thermogenic capacity and bioenergetics in T. belangeri. Results showed that T. belangeri increased body mass, thermogenesis capacity, protein contents and cytochrome c oxidase (COX) activity of liver and brown adipose tissue in winter-like environments, which indicated that temperature was the primary signal for T...
February 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28141809/self-organised-criticality-in-the-evolution-of-a-thermodynamic-model-of-rodent-thermoregulatory-huddling
#20
Stuart P Wilson
A thermodynamic model of thermoregulatory huddling interactions between endotherms is developed. The model is presented as a Monte Carlo algorithm in which animals are iteratively exchanged between groups, with a probability of exchanging groups defined in terms of the temperature of the environment and the body temperatures of the animals. The temperature-dependent exchange of animals between groups is shown to reproduce a second-order critical phase transition, i.e., a smooth switch to huddling when the environment gets colder, as measured in recent experiments...
January 2017: PLoS Computational Biology
keyword
keyword
14932
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"