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Ivanova YM, Blondin DP. Examining the benefits of cold exposure as a therapeutic strategy for obesity and type 2 diabetes. J Appl Physiol (1985) 2021; 130:1448-1459. [PMID: 33764169 DOI: 10.1152/japplphysiol.00934.2020] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The pathogenesis of metabolic diseases such as obesity and type 2 diabetes are characterized by a progressive dysregulation in energy partitioning, often leading to end-organ complications. One emerging approach proposed to target this metabolic dysregulation is the application of mild cold exposure. In healthy individuals, cold exposure can increase energy expenditure and whole body glucose and fatty acid utilization. Repeated exposures can lower fasting glucose and insulin levels and improve dietary fatty acid handling, even in healthy individuals. Despite its apparent therapeutic potential, little is known regarding the effects of cold exposure in populations for which this stimulation could benefit the most. The few studies available have shown that both acute and repeated exposures to the cold can improve insulin sensitivity and reduce fasting glycemia in individuals with type 2 diabetes. However, critical gaps remain in understanding the prolonged effects of repeated cold exposures on glucose regulation and whole body insulin sensitivity in individuals with metabolic syndrome. Much of the metabolic benefits appear to be attributable to the recruitment of shivering skeletal muscles. However, further work is required to determine whether the broader recruitment of skeletal muscles observed during cold exposure can confer metabolic benefits that surpass what has been historically observed from endurance exercise. In addition, although cold exposure offers unique cardiovascular responses for a physiological stimulus that increases energy expenditure, further work is required to determine how acute and repeated cold exposure can impact cardiovascular responses and myocardial function across a broader scope of individuals.
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Affiliation(s)
- Yoanna M Ivanova
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Québec, Canada.,Department of Pharmacology-Physiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Denis P Blondin
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Québec, Canada.,Division of Neurology, Department of Medicine, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec, Canada
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52
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Zu Y, Zhao L, Hao L, Mechref Y, Zabet-Moghaddam M, Keyel PA, Abbasi M, Wu D, Dawson JA, Zhang R, Nie S, Moustaid-Moussa N, Kolonin MG, Daquinag AC, Brandi L, Warraich I, San Francisco SK, Sun X, Fan Z, Wang S. Browning white adipose tissue using adipose stromal cell-targeted resveratrol-loaded nanoparticles for combating obesity. J Control Release 2021; 333:339-351. [PMID: 33766692 DOI: 10.1016/j.jconrel.2021.03.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 03/06/2021] [Accepted: 03/16/2021] [Indexed: 01/01/2023]
Abstract
Enhancing thermogenic energy expenditure via promoting the browning of white adipose tissue (WAT) is a potential therapeutic strategy to manage energy imbalance and the consequent comorbidities associated with excess body weight. Adverse effects and toxicities of currently available methods to induce browning of WAT have retarded exploration of this promising therapeutic approach. Targeted delivery of browning agents to adipose stromal cells (ASCs) in subcutaneous WAT to induce differentiation into beige adipocytes may overcome these barriers. Herein, we report for the first time, ASC-targeted delivery of trans-resveratrol (R), a representative agent, using ligand-coated R-encapsulated nanoparticles (L-Rnano) that selectively bind to glycanation site-deficient decorin receptors on ASCs. After biweekly intravenous administration of L-Rnano to obese C57BL/6 J mice for 5 weeks targeted R delivery significantly induced ASCs differentiation into beige adipocytes, which subsequently resulted in 40% decrease in fat mass, accompanied by improved glucose homeostasis and decreased inflammation. Our results suggest that the ASC-targeted nanoparticle delivery of browning agents could be a transformative technology in combating obesity and its comorbidities with high efficacy and low toxicity.
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Affiliation(s)
- Yujiao Zu
- Department of Nutritional Sciences, Texas Tech University, Lubbock, TX 79409, USA
| | - Ling Zhao
- Department of Nutrition, The University of Tennessee, Knoxville, TN 37996, USA
| | - Lei Hao
- Department of Nutritional Sciences, Texas Tech University, Lubbock, TX 79409, USA
| | - Yehia Mechref
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA; Center for Biotechnology and Genomics, Texas Tech University, Lubbock, TX 79409, USA
| | - Masoud Zabet-Moghaddam
- Center for Biotechnology and Genomics, Texas Tech University, Lubbock, TX 79409, USA; Department of Biological Sciences, Texas Tech University, Lubbock, TX 79409, USA
| | - Peter A Keyel
- Department of Biological Sciences, Texas Tech University, Lubbock, TX 79409, USA
| | - Mehrnaz Abbasi
- Department of Nutritional Sciences, Texas Tech University, Lubbock, TX 79409, USA; College of Health Solutions, Arizona State University, Phoenix, AZ 85004, USA
| | - Dayong Wu
- Nutrition Immunology Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA 02111, USA
| | - John A Dawson
- Department of Nutritional Sciences, Texas Tech University, Lubbock, TX 79409, USA; Center for Biotechnology and Genomics, Texas Tech University, Lubbock, TX 79409, USA
| | - Ruiwen Zhang
- Department of Pharmacological and Pharmaceutical Sciences and Drug Discovery Institute, University of Houston, Houston, TX 77204, USA
| | - Shufang Nie
- Department of Nutritional Sciences, Texas Tech University, Lubbock, TX 79409, USA
| | | | - Mikhail G Kolonin
- Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Alexes C Daquinag
- Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Luis Brandi
- Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, TX 70430, USA
| | - Irfan Warraich
- Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, TX 70430, USA
| | - Susan K San Francisco
- Center for Biotechnology and Genomics, Texas Tech University, Lubbock, TX 79409, USA
| | - Xiaocun Sun
- Research Computing Support, University of Tennessee, Knoxville, TN 37996, USA
| | - Zhaoyang Fan
- Department of Electrical & Computer Engineering and Nano Tech Center, Texas Tech University, Lubbock, TX 79409, USA; School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, AZ 85287, USA
| | - Shu Wang
- Department of Nutritional Sciences, Texas Tech University, Lubbock, TX 79409, USA; College of Health Solutions, Arizona State University, Phoenix, AZ 85004, USA.
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53
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Remie CME, Moonen MPB, Roumans KHM, Nascimento EBM, Gemmink A, Havekes B, Schaart G, Kornips E, Joris PJ, Schrauwen-Hinderling VB, Hoeks J, Kersten S, Hesselink MKC, Phielix E, Lichtenbelt WDVM, Schrauwen P. Metabolic responses to mild cold acclimation in type 2 diabetes patients. Nat Commun 2021; 12:1516. [PMID: 33750795 PMCID: PMC7943816 DOI: 10.1038/s41467-021-21813-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 01/29/2021] [Indexed: 12/20/2022] Open
Abstract
Mild cold acclimation for 10 days has been previously shown to markedly improve insulin sensitivity in patients with type 2 diabetes. Here we show in a single-arm intervention study (Trialregister.nl ID: NL4469/NTR5711) in nine patients with type 2 diabetes that ten days of mild cold acclimation (16–17 °C) in which observable, overt shivering was prevented, does not result in improved insulin sensitivity, postprandial glucose and lipid metabolism or intrahepatic lipid content and only results in mild effects on overnight fasted fat oxidation, postprandial energy expenditure and aortic augmentation index. The lack of marked metabolic effects in this study is associated with a lack of self-reported shivering and a lack of upregulation of gene expression of muscle activation or muscle contraction pathways in skeletal muscle and suggests that some form of muscle contraction is needed for beneficial effects of mild cold acclimation. Cold acclimation has been shown to have beneficial metabolic effects, including improved insulin sensitivity in patients with type 2 diabetes. Here the authors show that a mild cold acclimation regiment during which overt shivering was prevented did not result in improved insulin sensitivity in a small group of patients with type 2 diabetes.
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Affiliation(s)
- Carlijn M E Remie
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Michiel P B Moonen
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Kay H M Roumans
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Emmani B M Nascimento
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Anne Gemmink
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Bas Havekes
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands.,Department of Internal Medicine, Division of Endocrinology and Metabolic Disease, Maastricht University Medical Center, Maastricht, AZ, The Netherlands
| | - Gert Schaart
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Esther Kornips
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Peter J Joris
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Vera B Schrauwen-Hinderling
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands.,Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, Maastricht, AZ, The Netherlands
| | - Joris Hoeks
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Sander Kersten
- Nutrition, Metabolism and Genomics Group, Division of Human Nutrition and Health, Wageningen University, Wageningen, WE, The Netherlands
| | - Matthijs K C Hesselink
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Esther Phielix
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Wouter D van Marken Lichtenbelt
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Patrick Schrauwen
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands.
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54
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Brown Adipose Tissue and Its Role in Insulin and Glucose Homeostasis. Int J Mol Sci 2021; 22:ijms22041530. [PMID: 33546400 PMCID: PMC7913527 DOI: 10.3390/ijms22041530] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/21/2021] [Accepted: 02/01/2021] [Indexed: 12/15/2022] Open
Abstract
The increased worldwide prevalence of obesity, insulin resistance, and their related metabolic complications have prompted the scientific world to search for new possibilities to combat obesity. Brown adipose tissue (BAT), due to its unique protein uncoupling protein 1 (UPC1) in the inner membrane of the mitochondria, has been acknowledged as a promising approach to increase energy expenditure. Activated brown adipocytes dissipate energy, resulting in heat production. In other words, BAT burns fat and increases the metabolic rate, promoting a negative energy balance. Moreover, BAT alleviates metabolic complications like dyslipidemia, impaired insulin secretion, and insulin resistance in type 2 diabetes. The aim of this review is to explore the role of BAT in total energy expenditure, as well as lipid and glucose homeostasis, and to discuss new possible activators of brown adipose tissue in humans to treat obesity and metabolic disorders.
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55
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Central Apolipoprotein A-IV Stimulates Thermogenesis in Brown Adipose Tissue. Int J Mol Sci 2021; 22:ijms22031221. [PMID: 33513710 PMCID: PMC7865537 DOI: 10.3390/ijms22031221] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 01/22/2021] [Indexed: 12/30/2022] Open
Abstract
Stimulation of thermogenesis in brown adipose tissue (BAT) could have far-reaching health benefits in combatting obesity and obesity-related complications. Apolipoprotein A-IV (ApoA-IV), produced by the gut and the brain in the presence of dietary lipids, is a well-known short-term satiating protein. While our previous studies have demonstrated reduced diet-induced thermogenesis in ApoA-IV-deficient mice, it is unclear whether this reduction is due to a loss of peripheral or central effects of ApoA-IV. We hypothesized that central administration of ApoA-IV stimulates BAT thermogenesis and that sympathetic and sensory innervation is necessary for this action. To test this hypothesis, mice with unilateral denervation of interscapular BAT received central injections of recombinant ApoA-IV protein or artificial cerebrospinal fluid (CSF). The effects of central ApoA-IV on BAT temperature and thermogenesis in mice with unilateral denervation of the intrascapular BAT were monitored using transponder probe implantation, qPCR, and immunoblots. Relative to CSF, central administration of ApoA-IV significantly increased temperature and UCP expression in BAT. However, all of these effects were significantly attenuated or prevented in mice with unilateral denervation. Together, these results clearly demonstrate that ApoA-IV regulates BAT thermogenesis centrally, and this effect is mediated through sympathetic and sensory nerves.
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56
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Hildebrand S, Löwa N, Paysen H, Fratila RM, Reverte-Salisa L, Trakoolwilaiwan T, Niu Z, Kasparis G, Preuss SF, Kosch O, M de la Fuente J, Thanh NTK, Wiekhorst F, Pfeifer A. Quantification of Lipoprotein Uptake in Vivo Using Magnetic Particle Imaging and Spectroscopy. ACS NANO 2021; 15:434-446. [PMID: 33306343 DOI: 10.1021/acsnano.0c03229] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Lipids are a major source of energy for most tissues, and lipid uptake and storage is therefore crucial for energy homeostasis. So far, quantification of lipid uptake in vivo has primarily relied on radioactive isotope labeling, exposing human subjects or experimental animals to ionizing radiation. Here, we describe the quantification of in vivo uptake of chylomicrons, the primary carriers of dietary lipids, in metabolically active tissues using magnetic particle imaging (MPI) and magnetic particle spectroscopy (MPS). We show that loading artificial chylomicrons (ACM) with iron oxide nanoparticles (IONPs) enables rapid and highly sensitive post hoc detection of lipid uptake in situ using MPS. Importantly, by utilizing highly magnetic Zn-doped iron oxide nanoparticles (ZnMNPs), we generated ACM with MPI tracer properties superseding the current gold-standard, Resovist, enabling quantification of lipid uptake from whole-animal scans. We focused on brown adipose tissue (BAT), which dissipates heat and can consume a large part of nutrient lipids, as a model for tightly regulated and inducible lipid uptake. High BAT activity in humans correlates with leanness and improved cardiometabolic health. However, the lack of nonradioactive imaging techniques is an important hurdle for the development of BAT-centered therapies for metabolic diseases such as obesity and type 2 diabetes. Comparison of MPI measurements with iron quantification by inductively coupled plasma mass spectrometry revealed that MPI rivals the performance of this highly sensitive technique. Our results represent radioactivity-free quantification of lipid uptake in metabolically active tissues such as BAT.
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Affiliation(s)
- Staffan Hildebrand
- Institut für Pharmakologie und Toxikologie, Rheinische Friedrich-Wilhelms-Universität Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
| | - Norbert Löwa
- 8.23 Metrology for Magnetic Nanoparticles, Physikalisch-Technische Bundesanstalt, Abbestraße 2-12, 10587 Berlin, Germany
| | - Hendrik Paysen
- 8.23 Metrology for Magnetic Nanoparticles, Physikalisch-Technische Bundesanstalt, Abbestraße 2-12, 10587 Berlin, Germany
| | - Raluca M Fratila
- INMA - Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Laia Reverte-Salisa
- Institut für Pharmakologie und Toxikologie, Rheinische Friedrich-Wilhelms-Universität Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
| | - Thithawat Trakoolwilaiwan
- Biophysics Group, Department of Physics and Astronomy, University College London, London WC1E 6BT, U.K
- UCL Healthcare Biomagnetics Laboratories, 21 Albemarle Street, London W1S 4BS, U.K
| | - Zheming Niu
- Institut für Pharmakologie und Toxikologie, Rheinische Friedrich-Wilhelms-Universität Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
| | - Georgios Kasparis
- Biophysics Group, Department of Physics and Astronomy, University College London, London WC1E 6BT, U.K
- UCL Healthcare Biomagnetics Laboratories, 21 Albemarle Street, London W1S 4BS, U.K
| | - Stephanie Franziska Preuss
- Institut für Pharmakologie und Toxikologie, Rheinische Friedrich-Wilhelms-Universität Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
| | - Olaf Kosch
- 8.23 Metrology for Magnetic Nanoparticles, Physikalisch-Technische Bundesanstalt, Abbestraße 2-12, 10587 Berlin, Germany
| | - Jesus M de la Fuente
- INMA - Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Nguyen Thi Kim Thanh
- Biophysics Group, Department of Physics and Astronomy, University College London, London WC1E 6BT, U.K
- UCL Healthcare Biomagnetics Laboratories, 21 Albemarle Street, London W1S 4BS, U.K
| | - Frank Wiekhorst
- 8.23 Metrology for Magnetic Nanoparticles, Physikalisch-Technische Bundesanstalt, Abbestraße 2-12, 10587 Berlin, Germany
| | - Alexander Pfeifer
- Institut für Pharmakologie und Toxikologie, Rheinische Friedrich-Wilhelms-Universität Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
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57
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Brown adipose tissue is associated with cardiometabolic health. Nat Med 2021; 27:58-65. [PMID: 33398160 DOI: 10.1038/s41591-020-1126-7] [Citation(s) in RCA: 324] [Impact Index Per Article: 108.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 10/09/2020] [Indexed: 01/02/2023]
Abstract
White fat stores excess energy, whereas brown and beige fat are thermogenic and dissipate energy as heat. Thermogenic adipose tissues markedly improve glucose and lipid homeostasis in mouse models, although the extent to which brown adipose tissue (BAT) influences metabolic and cardiovascular disease in humans is unclear1,2. Here we retrospectively categorized 134,529 18F-fluorodeoxyglucose positron emission tomography-computed tomography scans from 52,487 patients, by presence or absence of BAT, and used propensity score matching to assemble a study cohort. Scans in the study population were initially conducted for indications related to cancer diagnosis, treatment or surveillance, without previous stimulation. We report that individuals with BAT had lower prevalences of cardiometabolic diseases, and the presence of BAT was independently correlated with lower odds of type 2 diabetes, dyslipidemia, coronary artery disease, cerebrovascular disease, congestive heart failure and hypertension. These findings were supported by improved blood glucose, triglyceride and high-density lipoprotein values. The beneficial effects of BAT were more pronounced in individuals with overweight or obesity, indicating that BAT might play a role in mitigating the deleterious effects of obesity. Taken together, our findings highlight a potential role for BAT in promoting cardiometabolic health.
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58
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Sanchez-Delgado G, Alcantara JMA, Acosta FM, Martinez-Tellez B, Amaro-Gahete FJ, Merchan-Ramirez E, Löf M, Labayen I, Ravussin E, Ruiz JR. Energy Expenditure and Macronutrient Oxidation in Response to an Individualized Nonshivering Cooling Protocol. Obesity (Silver Spring) 2020; 28:2175-2183. [PMID: 32985119 DOI: 10.1002/oby.22972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 07/08/2020] [Accepted: 07/09/2020] [Indexed: 11/07/2022]
Abstract
OBJECTIVE This study aimed to describe the energy expenditure (EE) and macronutrient oxidation response to an individualized nonshivering cold exposure in young healthy adults. METHODS Two different groups of 44 (study 1: 22.1 [SD 2.1] years old, 25.6 [SD 5.2] kg/m2 , 34% men) and 13 young healthy adults (study 2: 25.6 [SD 3.0] years old, 23.6 [SD 2.4] kg/m2 , 54% men) participated in this study. Resting metabolic rate (RMR) and macronutrient oxidation rates were measured by indirect calorimetry under fasting conditions in a warm environment (for 30 minutes) and in mild cold conditions (for 65 minutes, with the individual wearing a water-perfused cooling vest set at an individualized temperature adjusted to the individual's shivering threshold). RESULTS In study 1, EE increased in the initial stage of cold exposure and remained stable for the whole cold exposure (P < 0.001). Mean cold-induced thermogenesis (9.56 ± 7.9 kcal/h) was 13.9% ± 11.6% of the RMR (range: -14.8% to 39.9% of the RMR). Carbohydrate oxidation decreased during the first 30 minutes of the cold exposure and later recovered up to the baseline values (P < 0.01) in parallel to opposite changes in fat oxidation (P < 0.01). Results were replicated in study 2. CONCLUSIONS A 1-hour mild cold exposure individually adjusted to elicit maximum nonshivering thermogenesis induces a very modest increase in EE and a shift of macronutrient oxidation that may underlie a shift in thermogenic tissue activity.
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Affiliation(s)
- Guillermo Sanchez-Delgado
- Promoting Fitness and Health Through Physical Activity Research Group, Sport and Health University Research Institute, Faculty of Sport Sciences, University of Granada, Granada, Spain
- Department of Physical Education and Sports, University of Granada, Granada, Spain
- Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA
| | - Juan M A Alcantara
- Promoting Fitness and Health Through Physical Activity Research Group, Sport and Health University Research Institute, Faculty of Sport Sciences, University of Granada, Granada, Spain
- Department of Physical Education and Sports, University of Granada, Granada, Spain
| | - Francisco M Acosta
- Promoting Fitness and Health Through Physical Activity Research Group, Sport and Health University Research Institute, Faculty of Sport Sciences, University of Granada, Granada, Spain
- Department of Physical Education and Sports, University of Granada, Granada, Spain
| | - Borja Martinez-Tellez
- Promoting Fitness and Health Through Physical Activity Research Group, Sport and Health University Research Institute, Faculty of Sport Sciences, University of Granada, Granada, Spain
- Department of Physical Education and Sports, University of Granada, Granada, Spain
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden University, Leiden, the Netherlands
- Einthoven Laboratory for Experimental Vascular Medicine, Department of Medicine, Leiden University Medical Center, Leiden University, Leiden, the Netherlands
| | - Francisco J Amaro-Gahete
- Promoting Fitness and Health Through Physical Activity Research Group, Sport and Health University Research Institute, Faculty of Sport Sciences, University of Granada, Granada, Spain
- Department of Physical Education and Sports, University of Granada, Granada, Spain
- Department of Medical Physiology, School of Medicine, University of Granada, Granada, Spain
| | - Elisa Merchan-Ramirez
- Promoting Fitness and Health Through Physical Activity Research Group, Sport and Health University Research Institute, Faculty of Sport Sciences, University of Granada, Granada, Spain
- Department of Physical Education and Sports, University of Granada, Granada, Spain
| | - Marie Löf
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden
- Department of Health, Medicine Caring Sciences, Linköping University, Linköping, Sweden
| | - Idoia Labayen
- Institute for Innovation and Sustainable Development in Food Chain, Navarra's Health Research Institute, Department of Health Sciences, Public University of Navarra, Pamplona, Spain
| | - Eric Ravussin
- Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA
| | - Jonatan R Ruiz
- Promoting Fitness and Health Through Physical Activity Research Group, Sport and Health University Research Institute, Faculty of Sport Sciences, University of Granada, Granada, Spain
- Department of Physical Education and Sports, University of Granada, Granada, Spain
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59
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Functional characterization of human brown adipose tissue metabolism. Biochem J 2020; 477:1261-1286. [PMID: 32271883 DOI: 10.1042/bcj20190464] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 03/13/2020] [Accepted: 03/16/2020] [Indexed: 02/07/2023]
Abstract
Brown adipose tissue (BAT) has long been described according to its histological features as a multilocular, lipid-containing tissue, light brown in color, that is also responsive to the cold and found especially in hibernating mammals and human infants. Its presence in both hibernators and human infants, combined with its function as a heat-generating organ, raised many questions about its role in humans. Early characterizations of the tissue in humans focused on its progressive atrophy with age and its apparent importance for cold-exposed workers. However, the use of positron emission tomography (PET) with the glucose tracer [18F]fluorodeoxyglucose ([18F]FDG) made it possible to begin characterizing the possible function of BAT in adult humans, and whether it could play a role in the prevention or treatment of obesity and type 2 diabetes (T2D). This review focuses on the in vivo functional characterization of human BAT, the methodological approaches applied to examine these features and addresses critical gaps that remain in moving the field forward. Specifically, we describe the anatomical and biomolecular features of human BAT, the modalities and applications of non-invasive tools such as PET and magnetic resonance imaging coupled with spectroscopy (MRI/MRS) to study BAT morphology and function in vivo, and finally describe the functional characteristics of human BAT that have only been possible through the development and application of such tools.
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60
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Paulus A, Drude N, van Marken Lichtenbelt W, Mottaghy FM, Bauwens M. Brown adipose tissue uptake of triglyceride-rich lipoprotein-derived fatty acids in diabetic or obese mice under different temperature conditions. EJNMMI Res 2020; 10:127. [PMID: 33085016 PMCID: PMC7578207 DOI: 10.1186/s13550-020-00701-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 09/17/2020] [Indexed: 05/15/2023] Open
Abstract
Background In vivo imaging of glucose analogue 2-deoxy-2-[18F]fluoro-d-glucose ([18F]FDG) via positron emission tomography (PET) is the current gold standard to visualize and assess brown adipose tissue (BAT) activity. However, glucose metabolism is only a part of the metabolic activity of BAT. [18F]FDG-PET has been shown in clinical trials to often fail to visualize BAT under insulin-resistant conditions associated with aging and weight gain. We employed a novel developed triglyceride-based tracer to visualize BATs metabolic activity under different temperature conditions as well as under diabetic and obese conditions in preclinical models. Results [18F]BDP-TG-chylomicron-like particles visualized BAT in control, streptozocin-induced diabetes and obese mice. Increased BAT tracer uptake was found in control mice acutely exposed to cold but not in cold-acclimated animals. Diabetes did not remove BAT tracer uptake, but did limit BAT tracer uptake to levels of control mice housed at 21 °C. In obese animals, BAT tracer uptake was significantly reduced, although the stimulating effect of cold exposure could still be noted. Conclusion BAT was visualized in control, diabetic and obese conditions. Streptozocin-induced diabetes, but not obesity, inhibited the stimulatory effect of cold exposure.
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Affiliation(s)
- Andreas Paulus
- Department of Radiology and Nuclear Medicine, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, The Netherlands.,Department of Nuclear Medicine, University Hospital RWTH Aachen, Aachen, Germany.,Department of Medical Imaging, Division of Nuclear Medicine, MUMC, Maastricht, The Netherlands
| | - Natascha Drude
- Department of Nuclear Medicine, University Hospital RWTH Aachen, Aachen, Germany.,Department of Nanomedicine and Theranostics, Institute for Experimental Molecular Imaging, Uniklinik RWTH Aachen and Helmholtz Institute for Biomedical Engineering, Aachen, Germany
| | - Wouter van Marken Lichtenbelt
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Felix M Mottaghy
- Department of Nuclear Medicine, University Hospital RWTH Aachen, Aachen, Germany.,Department of Medical Imaging, Division of Nuclear Medicine, MUMC, Maastricht, The Netherlands
| | - Matthias Bauwens
- Department of Medical Imaging, Division of Nuclear Medicine, MUMC, Maastricht, The Netherlands. .,Research School NUTRIM, Maastricht University, Universiteitssingel 50, 6229 ER, Maastricht, The Netherlands.
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61
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Jurado-Fasoli L, Merchan-Ramirez E, Martinez-Tellez B, Acosta FM, Sanchez-Delgado G, Amaro-Gahete FJ, Muñoz Hernandez V, Martinez-Avila WD, Ortiz-Alvarez L, Xu H, Arias Téllez MJ, Ruiz-López MD, Llamas-Elvira JM, Gil Á, Labayen I, Ruiz JR. Association between dietary factors and brown adipose tissue volume/ 18F-FDG uptake in young adults. Clin Nutr 2020; 40:1997-2008. [PMID: 32994069 DOI: 10.1016/j.clnu.2020.09.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 09/04/2020] [Accepted: 09/12/2020] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To study the association between usual dietary factors (dietary energy density, nutrient intake, food group consumption, and dietary pattern) and brown adipose tissue (BAT) volume/18F-fluorodeoxyglucose (18F-FDG) uptake after personalized cold exposure in young healthy adults. METHODS A total of 122 young adults (n = 82 women; 22.0 ± 2.1 years old; 24.8 ± 4.8 kg/m2) took part in this cross-sectional study. Dietary factors were measured via a food frequency questionnaire and three non-consecutive 24 h recalls. Dietary energy density (foods and caloric beverages included) and macronutrient intakes were subsequently estimated using EvalFINUT® software, food group consumption was estimated from the food frequency questionnaire, and different dietary patterns and quality indices were determined according to the reference methods. BAT volume, BAT 18F-FDG uptake, and skeletal muscle 18F-FDG uptake were assessed by static 18F-FDG positron-emission tomography and computed tomography (PET-CT) scans after a 2 h personalized exposure to cold. RESULTS A direct association was detected between dietary energy density and BAT Standardized Uptake Value (SUV)mean (β = 0.215; R2 = 0.044; P = 0.022), and between ethanol consumption and BAT volume (β = 0.215; R2 = 0.044; P = 0.022). The a priori Mediterranean dietary pattern was inversely associated with BAT SUVmean and SUVpeak (β = -0.273; R2 = 0.075; P = 0.003 and β = -0.255; R2 = 0.066; P = 0.005 respectively). In addition, the diet quality index for a Mediterranean diet and a pro-inflammatory dietary pattern (as determined via the dietary inflammatory index) were directly associated with BAT SUVmean and SUVpeak (SUVmean: β = 0.238; R2 = 0.053; P = 0.013 and β = 0.256; R2 = 0.052; P = 0.012 respectively; SUVpeak: β = 0.278; R2 = 0.073; P = 0.003 and β = 0.248; R2 = 0.049; P = 0.016 respectively). After controlling for multiplicity and possible confounders (sex, the evaluation wave and BMI), all the detected associations persisted. CONCLUSION Dietary factors are slightly associated with BAT volume and/or 18F-FDG uptake after a personalized cold exposure in young adults. Our results provide an overall picture of the potential relationships between dietary factors and BAT-related variables in humans.
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Affiliation(s)
- Lucas Jurado-Fasoli
- PROmoting FITness and Health through Physical Activity Research Group (PROFITH), Sport and Health University Research Institute (iMUDS), University of Granada, 18007, Granada, Spain; Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, 18011, Granada, Spain; EFFECTS 262 Research Group, Department of Medical Physiology, School of Medicine, University of Granada, 18071, Granada, Spain.
| | - Elisa Merchan-Ramirez
- PROmoting FITness and Health through Physical Activity Research Group (PROFITH), Sport and Health University Research Institute (iMUDS), University of Granada, 18007, Granada, Spain; Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, 18011, Granada, Spain
| | - Borja Martinez-Tellez
- PROmoting FITness and Health through Physical Activity Research Group (PROFITH), Sport and Health University Research Institute (iMUDS), University of Granada, 18007, Granada, Spain; Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, 18011, Granada, Spain; Department of Medicine, Division of Endocrinology, Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, 2333 ZA, Leiden, the Netherlands
| | - Francisco M Acosta
- PROmoting FITness and Health through Physical Activity Research Group (PROFITH), Sport and Health University Research Institute (iMUDS), University of Granada, 18007, Granada, Spain; Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, 18011, Granada, Spain
| | - Guillermo Sanchez-Delgado
- PROmoting FITness and Health through Physical Activity Research Group (PROFITH), Sport and Health University Research Institute (iMUDS), University of Granada, 18007, Granada, Spain; Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, 18011, Granada, Spain; Pennington Biomedical Research Center, Baton Rouge, LA, 70808, USA
| | - Francisco J Amaro-Gahete
- PROmoting FITness and Health through Physical Activity Research Group (PROFITH), Sport and Health University Research Institute (iMUDS), University of Granada, 18007, Granada, Spain; Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, 18011, Granada, Spain; EFFECTS 262 Research Group, Department of Medical Physiology, School of Medicine, University of Granada, 18071, Granada, Spain
| | - Victoria Muñoz Hernandez
- PROmoting FITness and Health through Physical Activity Research Group (PROFITH), Sport and Health University Research Institute (iMUDS), University of Granada, 18007, Granada, Spain; Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, 18011, Granada, Spain
| | - Wendy D Martinez-Avila
- PROmoting FITness and Health through Physical Activity Research Group (PROFITH), Sport and Health University Research Institute (iMUDS), University of Granada, 18007, Granada, Spain; Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, 18011, Granada, Spain
| | - Lourdes Ortiz-Alvarez
- PROmoting FITness and Health through Physical Activity Research Group (PROFITH), Sport and Health University Research Institute (iMUDS), University of Granada, 18007, Granada, Spain; Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, 18011, Granada, Spain; Department of Biochemistry and Molecular Biology II, University of Granada, 18071, Granada, Spain
| | - Huiwen Xu
- PROmoting FITness and Health through Physical Activity Research Group (PROFITH), Sport and Health University Research Institute (iMUDS), University of Granada, 18007, Granada, Spain; Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, 18011, Granada, Spain; Department of Biochemistry and Molecular Biology II, University of Granada, 18071, Granada, Spain
| | - María José Arias Téllez
- PROmoting FITness and Health through Physical Activity Research Group (PROFITH), Sport and Health University Research Institute (iMUDS), University of Granada, 18007, Granada, Spain; Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, 18011, Granada, Spain; Department of Nutrition, Faculty of Medicine, University of Chile, Independence, 1027, Santiago, Chile
| | - María Dolores Ruiz-López
- Department of Nutrition and Food Sciences, Faculty of Pharmacy, University of Granada, Campus de Cartuja, s.n, 18071, Granada, Spain; Iberoamerican Nutrition Foundation (FINUT), Av. Del Conocimiento 12, 3 (a) pta, Armilla, 18016, Granada, Spain; Institute of Nutrition and Food Technology "José Mataix," Biomedical Research Center, University of Granada, Parque Tecnológico de la Salud, Avenida del Conocimiento s/n, Armilla, 18100, Granada, Spain
| | - Jose M Llamas-Elvira
- Servicio de Medicina Nuclear, Hospital Universitario Virgen de las Nieves, Granada, Spain; Instituto de Investigación Biosanitaria de Granada (ibs. GRANADA), Granada, Spain
| | - Ángel Gil
- Department of Biochemistry and Molecular Biology II, University of Granada, 18071, Granada, Spain; Iberoamerican Nutrition Foundation (FINUT), Av. Del Conocimiento 12, 3 (a) pta, Armilla, 18016, Granada, Spain; Institute of Nutrition and Food Technology "José Mataix," Biomedical Research Center, University of Granada, Parque Tecnológico de la Salud, Avenida del Conocimiento s/n, Armilla, 18100, Granada, Spain; Instituto de Investigación Biosanitaria de Granada (ibs. GRANADA), Granada, Spain; CIBEROBN (Physiopathology of Obesity and Nutrition CB12/03/30038), Instituto de Salud Carlos III (ISCIII), 28029, Madrid, Spain
| | - Idoia Labayen
- Institute for Innovation & Sustainable Development in Food Chain (IS-FOOD), Public University of Navarra, Campus de Arrosadía, 31008, Pamplona, Spain
| | - Jonatan R Ruiz
- PROmoting FITness and Health through Physical Activity Research Group (PROFITH), Sport and Health University Research Institute (iMUDS), University of Granada, 18007, Granada, Spain; Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, 18011, Granada, Spain
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62
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Xiang AS, Giles C, Loh RK, Formosa MF, Eikelis N, Lambert GW, Meikle PJ, Kingwell BA, Carey AL. Plasma Docosahexaenoic Acid and Eicosapentaenoic Acid Concentrations Are Positively Associated with Brown Adipose Tissue Activity in Humans. Metabolites 2020; 10:metabo10100388. [PMID: 32998426 PMCID: PMC7601733 DOI: 10.3390/metabo10100388] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 09/14/2020] [Accepted: 09/26/2020] [Indexed: 12/12/2022] Open
Abstract
Brown adipose tissue (BAT) activation is a possible therapeutic strategy to increase energy expenditure and improve metabolic homeostasis in obesity. Recent studies have revealed novel interactions between BAT and circulating lipid species—in particular, the non-esterified fatty acid (NEFA) and oxylipin lipid classes. This study aimed to identify individual lipid species that may be associated with cold-stimulated BAT activity in humans. A panel of 44 NEFA and 41 oxylipin species were measured using mass-spectrometry-based lipidomics in the plasma of fourteen healthy male participants before and after 90 min of mild cold exposure. Lipid measures were correlated with BAT activity measured via 18F-fluorodeoxyglucose ([18F]FDG) positron emission tomography/computed tomography (PET/CT), along with norepinephrine (NE) concentration (a surrogate marker of sympathetic activity). The study identified a significant increase in total NEFA concentration following cold exposure that was positively associated with NE concentration change. Individually, 33 NEFA and 11 oxylipin species increased significantly in response to cold exposure. The concentration of the omega-3 NEFA, docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) at baseline was significantly associated with BAT activity, and the cold-induced change in 18 NEFA species was significantly associated with BAT activity. No significant associations were identified between BAT activity and oxylipins.
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Affiliation(s)
- Angie S. Xiang
- Metabolic and Vascular Physiology Laboratory, Baker Heart and Diabetes Institute, Melbourne 3004, Australia; (A.S.X.); (R.K.C.L.); (M.F.F.); (B.A.K.); (A.L.C.)
- Central Clinical School, Monash University, Clayton, Melbourne 3004, Australia
| | - Corey Giles
- Metabolomics Laboratory, Baker Heart and Diabetes Institute, Melbourne 3004, Australia;
- Correspondence: ; Tel.: +61-3-8532-1536
| | - Rebecca K.C. Loh
- Metabolic and Vascular Physiology Laboratory, Baker Heart and Diabetes Institute, Melbourne 3004, Australia; (A.S.X.); (R.K.C.L.); (M.F.F.); (B.A.K.); (A.L.C.)
- Department of Physiology, Monash University, Clayton, Melbourne 3800, Australia
| | - Melissa F. Formosa
- Metabolic and Vascular Physiology Laboratory, Baker Heart and Diabetes Institute, Melbourne 3004, Australia; (A.S.X.); (R.K.C.L.); (M.F.F.); (B.A.K.); (A.L.C.)
| | - Nina Eikelis
- Iverson Health Innovation Research Institute, Swinburne Institute of Technology, Melbourne 3122, Australia; (N.E.); (G.W.L.)
| | - Gavin W. Lambert
- Iverson Health Innovation Research Institute, Swinburne Institute of Technology, Melbourne 3122, Australia; (N.E.); (G.W.L.)
| | - Peter J. Meikle
- Metabolomics Laboratory, Baker Heart and Diabetes Institute, Melbourne 3004, Australia;
| | - Bronwyn A. Kingwell
- Metabolic and Vascular Physiology Laboratory, Baker Heart and Diabetes Institute, Melbourne 3004, Australia; (A.S.X.); (R.K.C.L.); (M.F.F.); (B.A.K.); (A.L.C.)
- Central Clinical School, Monash University, Clayton, Melbourne 3004, Australia
- Department of Physiology, Monash University, Clayton, Melbourne 3800, Australia
- Research Therapeutic Area, CSL Limited, Parkville 3052, Australia
| | - Andrew L. Carey
- Metabolic and Vascular Physiology Laboratory, Baker Heart and Diabetes Institute, Melbourne 3004, Australia; (A.S.X.); (R.K.C.L.); (M.F.F.); (B.A.K.); (A.L.C.)
- Department of Physiology, Monash University, Clayton, Melbourne 3800, Australia
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63
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Fischer AW, Behrens J, Sass F, Schlein C, Heine M, Pertzborn P, Scheja L, Heeren J. Brown adipose tissue lipoprotein and glucose disposal is not determined by thermogenesis in uncoupling protein 1-deficient mice. J Lipid Res 2020; 61:1377-1389. [PMID: 32769145 DOI: 10.1194/jlr.ra119000455] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Adaptive thermogenesis is highly dependent on uncoupling protein 1 (UCP1), a protein expressed by thermogenic adipocytes present in brown adipose tissue (BAT) and white adipose tissue (WAT). Thermogenic capacity of human and mouse BAT can be measured by positron emission tomography-computed tomography quantifying the uptake of 18F-fluodeoxyglucose or lipid tracers. BAT activation is typically studied in response to cold exposure or treatment with β-3-adrenergic receptor agonists such as CL316,243 (CL). Currently, it is unknown whether cold-stimulated uptake of glucose or lipid tracers is a good surrogate marker of UCP1-mediated thermogenesis. In metabolic studies using radiolabeled tracers, we found that glucose uptake is increased in mildly cold-activated BAT of Ucp1 -/- versus WT mice kept at subthermoneutral temperature. Conversely, lower glucose disposal was detected after full thermogenic activation achieved by sustained cold exposure or CL treatment. In contrast, uptake of lipoprotein-derived fatty acids into chronically activated thermogenic adipose tissues was substantially increased in UCP1-deficient mice. This effect is linked to higher sympathetic tone in adipose tissues of Ucp1 -/- mice, as indicated by elevated levels of thermogenic genes in BAT and WAT. Thus, glucose and lipoprotein handling does not necessarily reflect UCP1-dependent thermogenic activity, but especially lipid uptake rather mirrors sympathetic activation of adipose tissues.
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Affiliation(s)
- Alexander W Fischer
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Janina Behrens
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Frederike Sass
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Christian Schlein
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Markus Heine
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Paul Pertzborn
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ludger Scheja
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Joerg Heeren
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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64
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Blondin DP, Nielsen S, Kuipers EN, Severinsen MC, Jensen VH, Miard S, Jespersen NZ, Kooijman S, Boon MR, Fortin M, Phoenix S, Frisch F, Guérin B, Turcotte ÉE, Haman F, Richard D, Picard F, Rensen PCN, Scheele C, Carpentier AC. Human Brown Adipocyte Thermogenesis Is Driven by β2-AR Stimulation. Cell Metab 2020; 32:287-300.e7. [PMID: 32755608 DOI: 10.1016/j.cmet.2020.07.005] [Citation(s) in RCA: 182] [Impact Index Per Article: 45.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 04/10/2020] [Accepted: 07/13/2020] [Indexed: 10/23/2022]
Abstract
Stimulation of brown adipose tissue (BAT) thermogenesis in humans has emerged as an attractive target to improve metabolic health. Pharmacological stimulations targeting the β3-adrenergic receptor (β3-AR), the adrenergic receptor believed to mediate BAT thermogenesis, have historically performed poorly in human clinical trials. Here we report that, in contrast to rodents, human BAT thermogenesis is not mediated by the stimulation of β3-AR. Oral administration of the β3-AR agonist mirabegron only elicited increases in BAT thermogenesis when ingested at the maximal allowable dose. This led to off-target binding to β1-AR and β2-AR, thereby increasing cardiovascular responses and white adipose tissue lipolysis, respectively. ADRB2 was co-expressed with UCP1 in human brown adipocytes. Pharmacological stimulation and inhibition of the β2-AR as well as knockdown of ADRB1, ADRB2, or ADRB3 in human brown adipocytes all confirmed that BAT lipolysis and thermogenesis occur through β2-AR signaling in humans (ClinicalTrials.govNCT02811289).
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Affiliation(s)
- Denis P Blondin
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada; Department of Physiology-Pharmacology, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Soren Nielsen
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark; The Centre of Inflammation and Metabolism and Centre for Physical Activity Research, Righospitalet, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Eline N Kuipers
- Department of Medicine, Division of Endocrinology, Leiden University Medical Center, Leiden, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Mai C Severinsen
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark; The Centre of Inflammation and Metabolism and Centre for Physical Activity Research, Righospitalet, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Verena H Jensen
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark; The Centre of Inflammation and Metabolism and Centre for Physical Activity Research, Righospitalet, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Stéphanie Miard
- Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Faculty of Pharmacy, Université Laval, Quebec City, QC, Canada
| | - Naja Z Jespersen
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark; The Centre of Inflammation and Metabolism and Centre for Physical Activity Research, Righospitalet, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Sander Kooijman
- Department of Medicine, Division of Endocrinology, Leiden University Medical Center, Leiden, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Mariëtte R Boon
- Department of Medicine, Division of Endocrinology, Leiden University Medical Center, Leiden, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Mélanie Fortin
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Serge Phoenix
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada; Department of Nuclear Medicine and Radiobiology, Centre d'Imagerie Moléculaire de Sherbrooke, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Frédérique Frisch
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Brigitte Guérin
- Department of Nuclear Medicine and Radiobiology, Centre d'Imagerie Moléculaire de Sherbrooke, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Éric E Turcotte
- Department of Nuclear Medicine and Radiobiology, Centre d'Imagerie Moléculaire de Sherbrooke, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - François Haman
- Faculty of Health Sciences, University of Ottawa, Ottawa, ON, Canada
| | - Denis Richard
- Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Faculty of Pharmacy, Université Laval, Quebec City, QC, Canada
| | - Frédéric Picard
- Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Faculty of Pharmacy, Université Laval, Quebec City, QC, Canada
| | - Patrick C N Rensen
- Department of Medicine, Division of Endocrinology, Leiden University Medical Center, Leiden, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Camilla Scheele
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark; The Centre of Inflammation and Metabolism and Centre for Physical Activity Research, Righospitalet, University Hospital of Copenhagen, Copenhagen, Denmark.
| | - André C Carpentier
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada; Department of Medicine, Université de Sherbrooke, Sherbrooke, QC, Canada.
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65
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UCP1-independent thermogenesis. Biochem J 2020; 477:709-725. [PMID: 32059055 DOI: 10.1042/bcj20190463] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 01/20/2020] [Accepted: 01/21/2020] [Indexed: 12/24/2022]
Abstract
Obesity results from energy imbalance, when energy intake exceeds energy expenditure. Brown adipose tissue (BAT) drives non-shivering thermogenesis which represents a powerful mechanism of enhancing the energy expenditure side of the energy balance equation. The best understood thermogenic system in BAT that evolved to protect the body from hypothermia is based on the uncoupling of protonmotive force from oxidative phosphorylation through the actions of uncoupling protein 1 (UCP1), a key regulator of cold-mediated thermogenesis. Similarly, energy expenditure is triggered in response to caloric excess, and animals with reduced thermogenic fat function can succumb to diet-induced obesity. Thus, it was surprising when inactivation of Ucp1 did not potentiate diet-induced obesity. In recent years, it has become clear that multiple thermogenic mechanisms exist, based on ATP sinks centered on creatine, lipid, or calcium cycling, along with Fatty acid-mediated UCP1-independent leak pathways driven by the ADP/ATP carrier (AAC). With a key difference between cold- and diet-induced thermogenesis being the dynamic changes in purine nucleotide (primarily ATP) levels, ATP-dependent thermogenic pathways may play a key role in diet-induced thermogenesis. Additionally, the ubiquitous expression of AAC may facilitate increased energy expenditure in many cell types, in the face of over feeding. Interest in UCP1-independent energy expenditure has begun to showcase the therapeutic potential that lies in refining our understanding of the diversity of biochemical pathways controlling thermogenic respiration.
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66
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Zou W, Rohatgi N, Brestoff JR, Moley JR, Li Y, Williams JW, Alippe Y, Pan H, Pietka TA, Mbalaviele G, Newberry EP, Davidson NO, Dey A, Shoghi KI, Head RD, Wickline SA, Randolph GJ, Abumrad NA, Teitelbaum SL. Myeloid-specific Asxl2 deletion limits diet-induced obesity by regulating energy expenditure. J Clin Invest 2020; 130:2644-2656. [PMID: 32310225 PMCID: PMC7190927 DOI: 10.1172/jci128687] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 02/04/2020] [Indexed: 01/13/2023] Open
Abstract
We previously established that global deletion of the enhancer of trithorax and polycomb (ETP) gene, Asxl2, prevents weight gain. Because proinflammatory macrophages recruited to adipose tissue are central to the metabolic complications of obesity, we explored the role of ASXL2 in myeloid lineage cells. Unexpectedly, mice without Asxl2 only in myeloid cells (Asxl2ΔLysM) were completely resistant to diet-induced weight gain and metabolically normal despite increased food intake, comparable activity, and equivalent fecal fat. Asxl2ΔLysM mice resisted HFD-induced adipose tissue macrophage infiltration and inflammatory cytokine gene expression. Energy expenditure and brown adipose tissue metabolism in Asxl2ΔLysM mice were protected from the suppressive effects of HFD, a phenomenon associated with relatively increased catecholamines likely due to their suppressed degradation by macrophages. White adipose tissue of HFD-fed Asxl2ΔLysM mice also exhibited none of the pathological remodeling extant in their control counterparts. Suppression of macrophage Asxl2 expression, via nanoparticle-based siRNA delivery, prevented HFD-induced obesity. Thus, ASXL2 controlled the response of macrophages to dietary factors to regulate metabolic homeostasis, suggesting modulation of the cells' inflammatory phenotype may impact obesity and its complications.
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Affiliation(s)
- Wei Zou
- Department of Pathology and Immunology and
| | | | | | | | - Yongjia Li
- Department of Pathology and Immunology and
| | | | - Yael Alippe
- Division of Bone and Mineral Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Hua Pan
- Department of Cardiovascular Sciences, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
| | - Terri A. Pietka
- Division of Geriatrics and Nutritional Science, Department of Medicine, and
| | - Gabriel Mbalaviele
- Division of Bone and Mineral Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Elizabeth P. Newberry
- Division of Gastroenterology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Nicholas O. Davidson
- Division of Gastroenterology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Anwesha Dey
- Department of Discovery Oncology, Genentech Inc., South San Francisco, California, USA
| | - Kooresh I. Shoghi
- Department of Radiology
- Department of Biomedical Engineering
- Division of Biology and Biomedical Sciences and
| | - Richard D. Head
- Department of Genetics, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Samuel A. Wickline
- Department of Cardiovascular Sciences, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
| | | | - Nada A. Abumrad
- Division of Geriatrics and Nutritional Science, Department of Medicine, and
| | - Steven L. Teitelbaum
- Department of Pathology and Immunology and
- Division of Bone and Mineral Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
- Shriners Hospitals for Children, St. Louis, Missouri, USA
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67
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McInnis K, Haman F, Doucet É. Humans in the cold: Regulating energy balance. Obes Rev 2020; 21:e12978. [PMID: 31863637 DOI: 10.1111/obr.12978] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 10/25/2019] [Accepted: 10/25/2019] [Indexed: 12/31/2022]
Abstract
For humans to maintain a stable core temperature in cold environments, an increase in energy expenditure (EE) is required. However, little is known about how cold stimulus impacts energy balance as a whole, as energy intake (EI) has been largely overlooked. This review focuses on the current state of knowledge regarding how cold exposure (CE) impacts both EE and EI, while highlighting key gaps and shortcomings in the literature. Animal models clearly reveal that CE produces large increases in EE, while decreasing environmental temperatures results in a significant negative dose-response effect in EI (r=-.787, P<.001), meaning animals eat more as temperature decreases. In humans, multiple methods are used to administer cold stimuli, which result in consistent yet quantitatively small increases in EE. However, only two studies have measured ad libitum food intake in combination with acute CE in humans. Chronic CE (i.e., cold acclimation) studies have been shown to produce minimal changes in body weight, with an average compensation of ~126%. Although more studies are required to investigate how cold impacts EI in humans, results presented in this review warrant caution before presenting or considering CE as a potential adjunct to weight loss strategies.
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Affiliation(s)
- Kurt McInnis
- School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, Canada
| | - François Haman
- School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, Canada
| | - Éric Doucet
- School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, Canada
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Demori I, Piccinno T, Saverino D, Luzzo E, Ottoboni S, Serpico D, Chiera M, Giuria R. Effects of winter sea bathing on psychoneuroendocrinoimmunological parameters. Explore (NY) 2020; 17:122-126. [PMID: 32224255 DOI: 10.1016/j.explore.2020.02.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 01/10/2020] [Accepted: 02/20/2020] [Indexed: 11/30/2022]
Abstract
CONTEXT Many people claim winter sea bathing gives them energy and health. According to the psychoneuroendocrinoimmunology (PNEI) paradigm, the stress response elicited by cold water immersion could indeed induce several beneficial psychophysical alterations. OBJECTIVE To determine the effects of winter sea bathing on psychological wellbeing, stress and immune markers. DESIGN A cross-sectional study. PARTICIPANTS 228 people, between 19 and 88 years, including 107 winter sea bathers and 121 controls. MAIN OUTCOME MEASURES A battery of questionnaires was administered to assess sociodemographic characteristics, self-perception of mental and physical heath, the number, duration and intensity of Upper Respiratory Tract Infections (URTIs) in the last year, and Big Five personality traits. 17 winter sea bathers and 15 controls (mean age 67 years) were further examined to evaluate physiological health, underwent one ear-nose-throat (ENT) examination, and provided saliva samples for measurements of biological markers (cortisol, sIgA, IL-1β, IL-6). RESULTS Winter sea bathing was associated with lower levels of self-reported stress and higher wellbeing. The ENT examinations did not reveal signs of URTIs in winter sea bathers, who exhibited significantly higher levels of salivary sIgA compared to controls. Neither salivary IL-1β nor cortisol levels were significantly different between the two groups. CONCLUSIONS Winter sea bathers (even the elderly) had a perception of higher wellbeing and reported better health: thus, they appeared to take advantage of potential distress (cold water exposure) to improve their health.
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Affiliation(s)
- Ilaria Demori
- Department of Earth, Environment and Life Sciences (DISTAV), University of Genoa, Corso Europa 26, 16132 Genoa, Italy; Italian Society of Psychoneuroendocrinoimmunology (SIPNEI), Rome, Italy.
| | - Tommaso Piccinno
- VIE - Valutazione Innovazione Empowerment s.r.l., Via della Libertà 9/3, 16129 Genoa, Italy
| | - Daniele Saverino
- Department of Experimental Medicine (DIMES), University of Genoa, Via Leon Battista Alberti 2, 16132 Genoa, Italy
| | - Erika Luzzo
- Italian Society of Psychoneuroendocrinoimmunology (SIPNEI), Rome, Italy
| | - Stefano Ottoboni
- Department of Surgery Sciences and Integrated Diagnostics (DISC), University of Genoa, Viale Benedetto XV 6, 16132 Genoa, Italy
| | - Davide Serpico
- Italian Society of Psychoneuroendocrinoimmunology (SIPNEI), Rome, Italy; Department of Classics, Philosophy and History, University of Genoa, Via Balbi 2, 16126 Genoa, Italy
| | - Marco Chiera
- Italian Society of Psychoneuroendocrinoimmunology (SIPNEI), Rome, Italy
| | - Roberto Giuria
- Italian Society of Psychoneuroendocrinoimmunology (SIPNEI), Rome, Italy
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69
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Scheele C, Wolfrum C. Brown Adipose Crosstalk in Tissue Plasticity and Human Metabolism. Endocr Rev 2020; 41:bnz007. [PMID: 31638161 PMCID: PMC7006230 DOI: 10.1210/endrev/bnz007] [Citation(s) in RCA: 100] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 10/15/2019] [Indexed: 12/20/2022]
Abstract
Infants rely on brown adipose tissue (BAT) as a primary source of thermogenesis. In some adult humans, residuals of brown adipose tissue are adjacent to the central nervous system and acute activation increases metabolic rate. Brown adipose tissue (BAT) recruitment occurs during cold acclimation and includes secretion of factors, known as batokines, which target several different cell types within BAT, and promote adipogenesis, angiogenesis, immune cell interactions, and neurite outgrowth. All these processes seem to act in concert to promote an adapted BAT. Recent studies have also provided exciting data on whole body metabolic regulation with a broad spectrum of mechanisms involving BAT crosstalk with liver, skeletal muscle, and gut as well as the central nervous system. These widespread interactions might reflect the property of BAT of switching between an active thermogenic state where energy is highly consumed and drained from the circulation, and the passive thermoneutral state, where energy consumption is turned off. (Endocrine Reviews 41: XXX - XXX, 2020).
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Affiliation(s)
- Camilla Scheele
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
- The Centre of Inflammation and Metabolism and Centre for Physical Activity Research Rigshospitalet, University Hospital of Copenhagen, Denmark
| | - Christian Wolfrum
- Institute of Food, Nutrition, and Health, ETH Zürich, Schorenstrasse, Schwerzenbach, Switzerland
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Pan R, Zhu X, Maretich P, Chen Y. Metabolic Improvement via Enhancing Thermogenic Fat-Mediated Non-shivering Thermogenesis: From Rodents to Humans. Front Endocrinol (Lausanne) 2020; 11:633. [PMID: 33013706 PMCID: PMC7511774 DOI: 10.3389/fendo.2020.00633] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 08/05/2020] [Indexed: 12/28/2022] Open
Abstract
Brown and beige adipose tissues play a large role in non-shivering thermogenesis (NST) in mammals, and subsequently have been studied for decades as potential therapeutic targets to treat obesity and its related metabolic diseases. However, the mechanistic regulation of brown/beige adipose tissue induction and maintenance in humans is very limited due to the ethical reasons. In fact, metabolic signaling has primarily been investigated using rodent models. A better understanding of non-shivering thermogenesis in humans is thus vital and urgent in order to treat obesity by targeting human brown adipose tissue (BAT). In this review, we summarize the anatomical and physiological differences between rodent and human BAT, current useful and mostly non-invasive methods in studying human BAT, as well as recent advancements targeting thermogenic adipocytes as a means to combat metabolic diseases in humans. Furthermore, we also discuss several novel relevant strategies of therapeutic interventions, which has been attempted in rodent experiments, and possible future investigations in humans in this field.
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Affiliation(s)
- Ruping Pan
- Department of Nuclear Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaohua Zhu
- Department of Nuclear Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Pema Maretich
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, United States
| | - Yong Chen
- Department of Endocrinology, Internal Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
- *Correspondence: Yong Chen
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71
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McNeill BT, Morton NM, Stimson RH. Substrate Utilization by Brown Adipose Tissue: What's Hot and What's Not? Front Endocrinol (Lausanne) 2020; 11:571659. [PMID: 33101206 PMCID: PMC7545119 DOI: 10.3389/fendo.2020.571659] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 09/14/2020] [Indexed: 12/20/2022] Open
Abstract
Our understanding of brown adipose tissue (BAT) function in humans has increased rapidly over the past 10 years. This is predominantly due to the development of powerful non-invasive imaging techniques such as positron emission tomography that can quantify BAT mass and function using metabolic tracers. Activation of BAT during cold-induced thermogenesis is an effective way to dissipate energy to generate heat and requires utilization of multiple energy substrates for optimal function. This has led to interest in the activation of BAT as a potential therapeutic target for type 2 diabetes, dyslipidaemia, and obesity. Here, we provide an overview of the current understanding of BAT substrate utilization in humans and highlight additional mechanisms found in rodents, where BAT more prominently contributes to energy expenditure. During thermogenesis, BAT demonstrates substantially increased glucose uptake which appears to be critical for BAT function. However, glucose is not fully oxidized, with a large proportion converted to lactate. The primary energy substrate for thermogenesis is fatty acids, released from brown adipocyte triglyceride stores. Active BAT also sequesters circulating lipids to sustain optimal thermogenesis. Recent evidence reveals that metabolic intermediates from the tricarboxylic acid cycle and glycolytic pathways also play a critical role in BAT function. Understanding the role of these metabolites in regulating thermogenesis and whole body substrate utilization may elucidate novel strategies for therapeutic BAT activation.
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72
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Jimenez‐Pavon D, Corral‐Perez J, Sánchez‐Infantes D, Villarroya F, Ruiz JR, Martinez‐Tellez B. Infrared Thermography for Estimating Supraclavicular Skin Temperature and BAT Activity in Humans: A Systematic Review. Obesity (Silver Spring) 2019; 27:1932-1949. [PMID: 31691547 PMCID: PMC6899990 DOI: 10.1002/oby.22635] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 07/25/2019] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Brown adipose tissue (BAT) is a thermogenic tissue with potential as a therapeutic target in the treatment of obesity and related metabolic disorders. The most used technique for quantifying human BAT activity is the measurement of 18 F-fluorodeoxyglucose uptake via a positron emission tomography/computed tomography scan following exposure to cold. However, several studies have indicated the measurement of the supraclavicular skin temperature (SST) by infrared thermography (IRT) to be a less invasive alternative. This work reviews the state of the art of this latter method as a means of determining BAT activity in humans. METHODS The data sources for this review were PubMed, Web of Science, and EBSCOhost (SPORTdiscus), and eligible studies were those conducted in humans. RESULTS In most studies in which participants were first cooled, an increase in IRT-measured SST was noted. However, only 5 of 24 such studies also involved a nuclear technique that confirmed increased activity in BAT, and only 2 took into account the thickness of the fat layer when measuring SST by IRT. CONCLUSIONS More work is needed to understand the involvement of tissues other than BAT in determining IRT-measured SST; at present, IRT cannot determine whether any increase in SST is due to increased BAT activity.
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Affiliation(s)
- David Jimenez‐Pavon
- MOVE‐IT Research Group, Department of Physical Education, Faculty of Education SciencesUniversity of CádizCádizSpain
- Biomedical Research and Innovation Institute of Cádiz (INiBICA) Research Unit, Puerta del Mar University Hospital, University of CádizCádizSpain
| | - Juan Corral‐Perez
- MOVE‐IT Research Group, Department of Physical Education, Faculty of Education SciencesUniversity of CádizCádizSpain
- Biomedical Research and Innovation Institute of Cádiz (INiBICA) Research Unit, Puerta del Mar University Hospital, University of CádizCádizSpain
| | - David Sánchez‐Infantes
- Department of Endocrinology and NutritionGermans Trias i Pujol Research InstituteBadalonaBarcelonaSpain
- Biomedical Research Center (Fisiopatología de la Obesidad y Nutrición) (CIBEROBN), ISCIIIMadridSpain
| | - Francesc Villarroya
- Biomedical Research Center (Fisiopatología de la Obesidad y Nutrición) (CIBEROBN), ISCIIIMadridSpain
- Department of Biochemistry and Molecular BiomedicineInstitute of BiomedicineBarcelonaSpain
| | - Jonatan R. Ruiz
- PROFITH (PROmoting FITness and Health through Physical Activity) Research Group, Department of Physical Education and Sports, Faculty of Sport SciencesSport and Health University Research Institute (iMUDS), University of GranadaGranadaSpain
| | - Borja Martinez‐Tellez
- PROFITH (PROmoting FITness and Health through Physical Activity) Research Group, Department of Physical Education and Sports, Faculty of Sport SciencesSport and Health University Research Institute (iMUDS), University of GranadaGranadaSpain
- Department of Medicine, Division of Endocrinology, and Einthoven Laboratory for Experimental Vascular MedicineLeiden University Medical CentreLeidenthe Netherlands
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73
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Abstract
Adaptive thermogenesis is a catabolic process that consumes energy-storing molecules and expends that energy as heat in response to environmental changes. This process occurs primarily in brown and beige adipose tissue. Thermogenesis is regulated by many factors, including lipid derived paracrine and endocrine hormones called lipokines. Recently, technologic advances for identifying new lipid biomarkers of thermogenic activity have shed light on a diverse set of lipokines that act through different pathways to regulate energy expenditure. In this review, we highlight a few examples of lipokines that regulate thermogenesis. The biosynthesis, regulation, and effects of the thermogenic lipokines in several families are reviewed, including oloeylethanolamine, endocannabinoids, prostaglandin E2, and 12,13-diHOME. These thermogenic lipokines present potential therapeutic targets to combat states of excess energy storage, such as obesity and related metabolic disorders.
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Affiliation(s)
- Matthew D Lynes
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts
| | - Sean D Kodani
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts
| | - Yu-Hua Tseng
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts
- Harvard Stem Cell Institute, Harvard University, Cambridge, Massachusetts
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74
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Acosta FM, Martinez-Tellez B, Blondin DP, Haman F, Rensen PCN, Llamas-Elvira JM, Martinez-Nicolas A, Ruiz JR. Relationship between the Daily Rhythm of Distal Skin Temperature and Brown Adipose Tissue 18F-FDG Uptake in Young Sedentary Adults. J Biol Rhythms 2019; 34:533-550. [PMID: 31389278 PMCID: PMC6732824 DOI: 10.1177/0748730419865400] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The present study examines whether the daily rhythm of distal skin temperature (DST) is associated with brown adipose tissue (BAT) metabolism as determined by 18F-fluorodeoxyglucose (18F-FDG) uptake in young adults. Using a wireless thermometer (iButton) worn on the nondominant wrist, DST was measured in 77 subjects (26% male; age 22 ± 2 years; body mass index 25.2 ± 4.8 kg/m2) for 7 consecutive days. The temperatures to which they were habitually exposed over the day were also recorded. The interday stability of DST was calculated from the collected data, along with the intraday variability and relative amplitude; the mean temperature of the 5 and 10 consecutive hours with the maximum and minimum DST values, respectively; and when these hours occurred. Following exposure to cold, BAT volume and mean and peak standardized 18F-FDG uptake (SUVmean and SUVpeak) were determined for each subject via static 18F-FDG positron emission tomography/computed tomography scanning. Relative amplitude and the time at which the 10 consecutive hours of minimum DST values occurred were positively associated with BAT volume, SUVmean, and SUVpeak (p ≤ 0.02), whereas the mean DST of that period was inversely associated with the latter BAT variables (p ≤ 0.01). The interday stability and intraday variability of the DST were also associated (directly and inversely, respectively) with BAT SUVpeak (p ≤ 0.02 for both). All of these associations disappeared, however, when the analyses were adjusted for the ambient temperature to which the subjects were habitually exposed. Thus, the relationship between the daily rhythm of DST and BAT activity estimated by 18F-FDG uptake is masked by environmental and likely behavioral factors. Of note is that those participants exposed to the lowest ambient temperature showed 3 to 5 times more BAT volume and activity compared with subjects who were exposed to a warmer ambient temperature.
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Affiliation(s)
- Francisco M Acosta
- PROFITH "PROmoting FITness and Health through physical activity" research group, Department of Physical and Sports Education, Sport and Health University Research Institute (iMUDS), Faculty of Sports Science, University of Granada, Granada, Spain
| | - Borja Martinez-Tellez
- PROFITH "PROmoting FITness and Health through physical activity" research group, Department of Physical and Sports Education, Sport and Health University Research Institute (iMUDS), Faculty of Sports Science, University of Granada, Granada, Spain.,Department of Medicine, Division of Endocrinology, and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Denis P Blondin
- Faculty of Medicine and Health Sciences, Department of Pharmacology-Physiology, Université de Sherbrooke and Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Québec, Canada
| | - François Haman
- Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Patrick C N Rensen
- Department of Medicine, Division of Endocrinology, and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Jose M Llamas-Elvira
- Servicio de Medicina Nuclear, Hospital Universitario Virgen de las Nieves, Granada, Spain; Instituto de Investigación Biosanitaria (ibs. GRANADA), Servicio de Medicina Nuclear, Granada, Spain
| | - Antonio Martinez-Nicolas
- Chronobiology Lab, Department of Physiology, College of Biology, University of Murcia, Mare Nostrum Campus, IUIE, IMIB-Arrixaca, Murcia, Spain.,Ciber Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain
| | - Jonatan R Ruiz
- PROFITH "PROmoting FITness and Health through physical activity" research group, Department of Physical and Sports Education, Sport and Health University Research Institute (iMUDS), Faculty of Sports Science, University of Granada, Granada, Spain
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75
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Klepac K, Georgiadi A, Tschöp M, Herzig S. The role of brown and beige adipose tissue in glycaemic control. Mol Aspects Med 2019; 68:90-100. [PMID: 31283940 DOI: 10.1016/j.mam.2019.07.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 07/03/2019] [Accepted: 07/04/2019] [Indexed: 12/15/2022]
Abstract
For the past decade, brown adipose tissue (BAT) has been extensively studied as a potential therapy for obesity and metabolic diseases due to its thermogenic and glucose-consuming properties. It is now clear that the function of BAT goes beyond heat production, as it also plays an important endocrine role by secreting the so-called batokines to communicate with other metabolic tissues and regulate systemic energy homeostasis. However, despite numerous studies showing the benefits of BAT in rodents, it is still not clear whether recruitment of BAT can be utilized to treat human patients. Here, we review the advances on understanding the role of BAT in metabolism and its benefits on glucose and lipid homeostasis in both humans and rodents. Moreover, we discuss the latest methodological approaches to assess the contribution of BAT to human metabolism as well as the possibility to target BAT, pharmacologically or by lifestyle adaptations, to treat metabolic disorders.
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Affiliation(s)
- Katarina Klepac
- Institute for Diabetes and Cancer, Helmholtz Center Munich, Neuherberg, Germany; Joint Heidelberg-IDC Translational Diabetes Program, Heidelberg University Hospital, Inner Medicine 1, Heidelberg, Germany; Deutsches Zentrum für Diabetesforschung, Neuherberg, Germany
| | - Anastasia Georgiadi
- Institute for Diabetes and Cancer, Helmholtz Center Munich, Neuherberg, Germany; Joint Heidelberg-IDC Translational Diabetes Program, Heidelberg University Hospital, Inner Medicine 1, Heidelberg, Germany; Deutsches Zentrum für Diabetesforschung, Neuherberg, Germany
| | - Matthias Tschöp
- Deutsches Zentrum für Diabetesforschung, Neuherberg, Germany
| | - Stephan Herzig
- Institute for Diabetes and Cancer, Helmholtz Center Munich, Neuherberg, Germany; Joint Heidelberg-IDC Translational Diabetes Program, Heidelberg University Hospital, Inner Medicine 1, Heidelberg, Germany; Deutsches Zentrum für Diabetesforschung, Neuherberg, Germany; Chair Molecular Metabolic Control, Technical University Munich, Germany.
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76
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Gordon K, Blondin DP, Friesen BJ, Tingelstad HC, Kenny GP, Haman F. Seven days of cold acclimation substantially reduces shivering intensity and increases nonshivering thermogenesis in adult humans. J Appl Physiol (1985) 2019; 126:1598-1606. [PMID: 30896355 PMCID: PMC6620656 DOI: 10.1152/japplphysiol.01133.2018] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 02/21/2019] [Accepted: 03/17/2019] [Indexed: 01/24/2023] Open
Abstract
Daily compensable cold exposure in humans reduces shivering by ~20% without changing total heat production, partly by increasing brown adipose tissue thermogenic capacity and activity. Although acclimation and acclimatization studies have long suggested that daily reductions in core temperature are essential to elicit significant metabolic changes in response to repeated cold exposure, this has never directly been demonstrated. The aim of the present study is to determine whether daily cold-water immersion, resulting in a significant fall in core temperature, can further reduce shivering intensity during mild acute cold exposure. Seven men underwent 1 h of daily cold-water immersion (14°C) for seven consecutive days. Immediately before and following the acclimation protocol, participants underwent a mild cold exposure using a novel skin temperature clamping cold exposure protocol to elicit the same thermogenic rate between trials. Metabolic heat production, shivering intensity, muscle recruitment pattern, and thermal sensation were measured throughout these experimental sessions. Uncompensable cold acclimation reduced total shivering intensity by 36% (P = 0.003), without affecting whole body heat production, double what was previously shown from a 4-wk mild acclimation. This implies that nonshivering thermogenesis increased to supplement the reduction in the thermogenic contribution of shivering. As fuel selection did not change following the 7-day cold acclimation, we suggest that the nonshivering mechanism recruited must rely on a similar fuel mixture to produce this heat. The more significant reductions in shivering intensity compared with a longer mild cold acclimation suggest important differential metabolic responses, resulting from an uncompensable compared with compensable cold acclimation. NEW & NOTEWORTHY Several decades of research have been dedicated to reducing the presence of shivering during cold exposure. The present study aims to determine whether as little as seven consecutive days of cold-water immersion is sufficient to reduce shivering and increase nonshivering thermogenesis. We provide evidence that whole body nonshivering thermogenesis can be increased to offset a reduction in shivering activity to maintain endogenous heat production. This demonstrates that short, but intense cold stimulation can elicit rapid metabolic changes in humans, thereby improving our comfort and ability to perform various motor tasks in the cold. Further research is required to determine the nonshivering processes that are upregulated within this short time period.
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Affiliation(s)
- Kyle Gordon
- Faculty of Health Sciences, University of Ottawa , Ottawa , Canada
| | - Denis P Blondin
- Faculty of Medicine, Department of Biochemistry, Microbiology and Immunology, Ottawa , Canada
| | - Brian J Friesen
- Faculty of Health Sciences, University of Ottawa , Ottawa , Canada
| | | | - Glen P Kenny
- Faculty of Health Sciences, University of Ottawa , Ottawa , Canada
| | - François Haman
- Faculty of Health Sciences, University of Ottawa , Ottawa , Canada
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77
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Interscapular and Perivascular Brown Adipose Tissue Respond Differently to a Short-Term High-Fat Diet. Nutrients 2019; 11:nu11051065. [PMID: 31086124 PMCID: PMC6566556 DOI: 10.3390/nu11051065] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 05/07/2019] [Accepted: 05/08/2019] [Indexed: 12/18/2022] Open
Abstract
Brown adipose tissue (BAT) function may depend on its anatomical location and developmental origin. Interscapular BAT (iBAT) regulates acute macronutrient metabolism, whilst perivascular BAT (PVAT) regulates vascular function. Although phenotypically similar, whether these depots respond differently to acute nutrient excess is unclear. Given their distinct anatomical locations and developmental origins and we hypothesised that iBAT and PVAT would respond differently to brief period of nutrient excess. Sprague-Dawley rats aged 12 weeks (n=12) were fed either a standard (10% fat, n=6) or high fat diet (HFD: 45% fat, n=6) for 72h and housed at thermoneutrality. Following an assessment of whole body physiology, fat was collected from both depots for analysis of gene expression and the proteome. HFD consumption for 72h induced rapid weight gain (c. 2.6%) and reduced serum non-esterified fatty acids (NEFA) with no change in either total adipose or depot mass. In iBAT, an upregulation of genes involved in insulin signalling and lipid metabolism was accompanied by enrichment of lipid-related processes and functions, plus glucagon and peroxisome proliferator-activated receptor (PPAR) signalling pathways. In PVAT, HFD induced a pronounced down-regulation of multiple metabolic pathways which was accompanied with increased abundance of proteins involved in apoptosis (e.g., Hdgf and Ywaq) and toll-like receptor signalling (Ube2n). There was also an enrichment of DNA-related processes and functions (e.g., nucleosome assembly and histone exchange) and RNA degradation and cell adhesion pathways. In conclusion, we show that iBAT and PVAT elicit divergent responses to short-term nutrient excess highlighting early adaptations in these depots before changes in fat mass.
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78
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Shen H, Jiang L, Lin JD, Omary MB, Rui L. Brown fat activation mitigates alcohol-induced liver steatosis and injury in mice. J Clin Invest 2019; 129:2305-2317. [PMID: 30888335 PMCID: PMC6546460 DOI: 10.1172/jci124376] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 03/14/2019] [Indexed: 02/06/2023] Open
Abstract
Chronic alcohol consumption causes liver injury, inflammation and fibrosis, thereby increasing morbidity and mortality. Paradoxically, modest drinking is believed to confer metabolic improvement, but the underlying mechanism remains elusive. Here, we have identified a novel hepatoprotective brain/brown adipose tissue (BAT)/liver axis. Alcohol consumption or direct alcohol administration into the brain stimulated hypothalamic neural circuits and sympathetic nerves innervating BAT, and dramatically increased BAT uncoupling protein 1 (Ucp1) expression and activity in a BAT sympathetic nerve-dependent manner. BAT and beige fat oxidized fatty acids to fuel Ucp1-mediated thermogenesis, thereby inhibiting lipid trafficking into the liver. BAT also secreted several adipokines, including adiponectin that suppressed hepatocyte injury and death. Genetic deletion of Ucp1 profoundly augmented alcohol-induced liver steatosis, injury, inflammation and fibrosis in male and female mice. Conversely, activation of BAT and beige fat through cold exposure suppressed alcoholic liver disease development. Our results unravel an unrecognized brain alcohol-sensing/sympathetic nerve/BAT/liver axis that counteracts liver steatosis and injury.
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Affiliation(s)
- Hong Shen
- Department of Molecular & Integrative Physiology
| | - Lin Jiang
- Department of Molecular & Integrative Physiology
| | - Jiandie D. Lin
- Life Sciences Institute and Department of Cell & Developmental Biology, and
| | - M. Bishr Omary
- Department of Molecular & Integrative Physiology
- Department of Internal Medicine, Division of Gastroenterology and Hepatology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Liangyou Rui
- Department of Molecular & Integrative Physiology
- Department of Internal Medicine, Division of Gastroenterology and Hepatology, University of Michigan Medical School, Ann Arbor, Michigan, USA
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79
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Osuna-Prieto FJ, Martinez-Tellez B, Sanchez-Delgado G, Aguilera CM, Lozano-Sánchez J, Arráez-Román D, Segura-Carretero A, Ruiz JR. Activation of Human Brown Adipose Tissue by Capsinoids, Catechins, Ephedrine, and Other Dietary Components: A Systematic Review. Adv Nutr 2019; 10:291-302. [PMID: 30624591 PMCID: PMC6416040 DOI: 10.1093/advances/nmy067] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Human brown adipose tissue (BAT) has attracted clinical interest not only because it dissipates energy but also for its potential capacity to counteract obesity and related metabolic disorders (e.g., insulin resistance and dyslipidemia). Cold exposure is the most powerful stimulus for activating and recruiting BAT, and this stimulatory effect is mediated by the transient receptor potential (TRP) channels. BAT can also be activated by other receptors such as the G-protein-coupled bile acid receptor 1 (GPBAR1) or β-adrenergic receptors. Interestingly, these receptors also interact with several dietary components; in particular, capsinoids and tea catechins appear to mimic the effects of cold through a TRP-BAT axis, and they consequently seem to decrease body fat and improve metabolic blood parameters. This systematic review critically addresses the evidence behind the available human studies analyzing the effect of several dietary components (e.g., capsinoids, tea catechins, and ephedrine) on BAT activity. Even though the results of these studies are consistent with the outcomes of preclinical models, the lack of robust study designs makes it impossible to confirm the BAT-activation capacity of the specified dietary components. Further investigation into the effects of dietary components on BAT is warranted to clarify to what extent these components could serve as a powerful strategy to treat obesity and related metabolic disorders.
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Affiliation(s)
- Francisco J Osuna-Prieto
- PROFITH (PROmoting FITness and Health through Physical Activity) Research Group, Department of Physical and Sports Education, Faculty of Sport Sciences, University of Granada, Granada, Spain; Departments of
- Analytical Chemistry, University of Granada, Granada, Spain
- Research and Development of Functional Food Center (CIDAF), Health Sciences Technology Park, Granada, Spain
| | - Borja Martinez-Tellez
- PROFITH (PROmoting FITness and Health through Physical Activity) Research Group, Department of Physical and Sports Education, Faculty of Sport Sciences, University of Granada, Granada, Spain; Departments of
- Department of Medicine, Leiden University Medical Center, Division of Endocrinology, and Einthoven Laboratory for Experimental Vascular Medicine, Leiden, Netherlands
| | - Guillermo Sanchez-Delgado
- PROFITH (PROmoting FITness and Health through Physical Activity) Research Group, Department of Physical and Sports Education, Faculty of Sport Sciences, University of Granada, Granada, Spain; Departments of
| | - Concepción M Aguilera
- Biochemistry and Molecular Biology II, Institute of Nutrition and Food Technology, Center for Biomedical Research, University of Granada, Granada, Spain
- CIBEROBN, Biomedical Research Networking Center for Physiopathology of Obesity and Nutrition, Carlos III Health Institute, Madrid, Spain
| | - Jesús Lozano-Sánchez
- Analytical Chemistry, University of Granada, Granada, Spain
- Research and Development of Functional Food Center (CIDAF), Health Sciences Technology Park, Granada, Spain
| | - David Arráez-Román
- Analytical Chemistry, University of Granada, Granada, Spain
- Research and Development of Functional Food Center (CIDAF), Health Sciences Technology Park, Granada, Spain
| | - Antonio Segura-Carretero
- Analytical Chemistry, University of Granada, Granada, Spain
- Research and Development of Functional Food Center (CIDAF), Health Sciences Technology Park, Granada, Spain
| | - Jonatan R Ruiz
- PROFITH (PROmoting FITness and Health through Physical Activity) Research Group, Department of Physical and Sports Education, Faculty of Sport Sciences, University of Granada, Granada, Spain; Departments of
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Peres Valgas da Silva C, Hernández-Saavedra D, White JD, Stanford KI. Cold and Exercise: Therapeutic Tools to Activate Brown Adipose Tissue and Combat Obesity. BIOLOGY 2019; 8:biology8010009. [PMID: 30759802 PMCID: PMC6466122 DOI: 10.3390/biology8010009] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 02/01/2019] [Accepted: 02/04/2019] [Indexed: 12/11/2022]
Abstract
The rise in obesity over the last several decades has reached pandemic proportions. Brown adipose tissue (BAT) is a thermogenic organ that is involved in energy expenditure and represents an attractive target to combat both obesity and type 2 diabetes. Cold exposure and exercise training are two stimuli that have been investigated with respect to BAT activation, metabolism, and the contribution of BAT to metabolic health. These two stimuli are of great interest because they have both disparate and converging effects on BAT activation and metabolism. Cold exposure is an effective mechanism to stimulate BAT activity and increase glucose and lipid uptake through mitochondrial uncoupling, resulting in metabolic benefits including elevated energy expenditure and increased insulin sensitivity. Exercise is a therapeutic tool that has marked benefits on systemic metabolism and affects several tissues, including BAT. Compared to cold exposure, studies focused on BAT metabolism and exercise display conflicting results; the majority of studies in rodents and humans demonstrate a reduction in BAT activity and reduced glucose and lipid uptake and storage. In addition to investigations of energy uptake and utilization, recent studies have focused on the effects of cold exposure and exercise on the structural lipids in BAT and secreted factors released from BAT, termed batokines. Cold exposure and exercise induce opposite responses in terms of structural lipids, but an important overlap exists between the effects of cold and exercise on batokines. In this review, we will discuss the similarities and differences of cold exposure and exercise in relation to their effects on BAT activity and metabolism and its relevance for the prevention of obesity and the development of type 2 diabetes.
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Affiliation(s)
- Carmem Peres Valgas da Silva
- Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
- Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
| | - Diego Hernández-Saavedra
- Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
- Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
| | - Joseph D White
- Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
- Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
| | - Kristin I Stanford
- Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
- Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
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81
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Srivastava S, Veech RL. Brown and Brite: The Fat Soldiers in the Anti-obesity Fight. Front Physiol 2019; 10:38. [PMID: 30761017 PMCID: PMC6363669 DOI: 10.3389/fphys.2019.00038] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 01/14/2019] [Indexed: 12/16/2022] Open
Abstract
Brown adipose tissue (BAT) is proposed to maintain thermal homeostasis through dissipation of chemical energy as heat by the uncoupling proteins (UCPs) present in their mitochondria. The recent demonstration of the presence of BAT in humans has invigorated research in this area. The research has provided many new insights into the biology and functioning of this tissue and the biological implications of its altered activities. Another finding of interest is browning of white adipose tissue (WAT) resulting in what is known as beige/brite cells, which have increased mitochondrial proteins and UCPs. In general, it has been observed that the activation of BAT is associated with various physiological improvements such as a reduction in blood glucose levels increased resting energy expenditure and reduced weight. Given the similar physiological functions of BAT and beige/ brite cells and the higher mass of WAT compared to BAT, it is likely that increasing the brite/beige cells in WATs may also lead to greater metabolic benefits. However, development of treatments targeting brown fat or WAT browning would require not only a substantial understanding of the biology of these tissues but also the effect of altering their activity levels on whole body metabolism and physiology. In this review, we present evidence from recent literature on the substrates utilized by BAT, regulation of BAT activity and browning by circulating molecules. We also present dietary and pharmacological activators of brown and beige/brite adipose tissue and the effect of physical exercise on BAT activity and browning.
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Affiliation(s)
- Shireesh Srivastava
- Systems Biology for Biofuels Group, International Centre for Genetic Engineering and Biotechnology (ICGEB), New Delhi, India
| | - Richard L Veech
- Laboratory of Metabolic Control, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), Bethesda, MD, United States
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82
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Chondronikola M, Sidossis LS. Brown and beige fat: From molecules to physiology. Biochim Biophys Acta Mol Cell Biol Lipids 2019; 1864:91-103. [DOI: 10.1016/j.bbalip.2018.05.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Revised: 02/11/2018] [Accepted: 05/23/2018] [Indexed: 12/16/2022]
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83
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Nascimento EBM, van Marken Lichtenbelt WD. In Vivo Detection of Human Brown Adipose Tissue During Cold and Exercise by PET/CT. Handb Exp Pharmacol 2019; 251:283-298. [PMID: 29725775 DOI: 10.1007/164_2018_121] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The role of brown adipose tissue (BAT) in non-shivering thermogenesis is well established in animals. BAT is activated following cold exposure, resulting in non-shivering thermogenesis, to ensure a constant body temperature. In mitochondria of brown adipocytes, glucose and fatty acids are used as substrate for uncoupling resulting in heat production. Activated BAT functions as a sink for glucose and fatty acids and this hallmark has designated BAT a target in the fight against metabolic diseases like type 2 diabetes mellitus and obesity. In order to make valid claims regarding BAT activity in humans, BAT activity needs to be quantified. The combination of positron emission tomography (PET) and computer tomography (CT) analysis is currently the most frequently used imaging technique to determine BAT activity in humans. Here, we will discuss the history of PET/CT and radioisotopes used to determine BAT activity in humans. Moreover, we will assess how PET/CT is used to determine BAT activity following cold and exercise.
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84
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Martinez-Tellez B, Xu H, Sanchez-Delgado G, Acosta FM, Rensen PCN, Llamas-Elvira JM, Ruiz JR. Association of wrist and ambient temperature with cold-induced brown adipose tissue and skeletal muscle [18F]FDG uptake in young adults. Am J Physiol Regul Integr Comp Physiol 2018; 315:R1281-R1288. [DOI: 10.1152/ajpregu.00238.2018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Brown adipose tissue (BAT) activity is influenced by the outdoor temperature variation. However, people spend most of their time indoors, especially in colder regions and during cold seasons. Therefore, outdoor temperature is probably not an accurate tool to quantify the exposure of the participants before BAT quantification. We studied the association of wrist and personal environmental temperatures with cold-induced BAT and skeletal muscle [18F]fluorodeoxyglucose ([18F]FDG) uptake in adults. A total of 74 participants wore two iButtons during 7 days to measure wrist temperature (WT) and personal level of environmental temperature (Personal-ET). Thereafter, we performed a 2-h personalized cooling protocol before performing an [18F]FDG-PET/CT scan. WT was negatively associated with BAT volume ( R2 = 0.122; P = 0.002) and BAT activity [standardized uptake value (SUV)peak, R2 = 0.083; P = 0.012]. Moreover, Personal-ET was negatively associated with BAT volume ( R2 = 0.164; P < 0.001), BAT activity (SUVmean and SUVpeak, all R2 ≥ 0.167; P < 0.001), and skeletal muscle activity (SUVpeak, R2 = 0.122; P = 0.002). Interestingly, the time exposed to a certain Personal-ET (16–20°C) positively correlated only with [18F]FDG uptake by BAT (volume and activity; all P ≤ 0.05), whereas the time exposed to 12–15°C positively correlated only with measures of [18F]FDG uptake by skeletal muscle activity (all P ≤ 0.05). This study shows that WT and Personal-ET are associated with [18F]FDG uptake by BAT and skeletal muscle activity in adults within certain temperature thresholds. Moreover, our results suggest that [18F]FDG uptake by human BAT or skeletal muscle can be activated or inhibited in different ranges of ambient temperatures exposures. Results should be taken with caution because the observed associations were relatively weak.
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Affiliation(s)
- Borja Martinez-Tellez
- PROFITH (PROmoting FITness and Health through Physical Activity) Research Group, Department of Physical and Sports Education, Faculty of Sports Science, University of Granada, Granada, Spain
- Department of Medicine, Division of Endocrinology, and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Huiwen Xu
- PROFITH (PROmoting FITness and Health through Physical Activity) Research Group, Department of Physical and Sports Education, Faculty of Sports Science, University of Granada, Granada, Spain
| | - Guillermo Sanchez-Delgado
- PROFITH (PROmoting FITness and Health through Physical Activity) Research Group, Department of Physical and Sports Education, Faculty of Sports Science, University of Granada, Granada, Spain
| | - Francisco M. Acosta
- PROFITH (PROmoting FITness and Health through Physical Activity) Research Group, Department of Physical and Sports Education, Faculty of Sports Science, University of Granada, Granada, Spain
| | - Patrick C. N. Rensen
- Department of Medicine, Division of Endocrinology, and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Jose M. Llamas-Elvira
- Nuclear Medicine Department, “Virgen de las Nieves” University Hospital, Granada, Spain
- Biohealth Research Institute in Granada, Nuclear Medicine Department, Granada, Spain
| | - Jonatan R. Ruiz
- PROFITH (PROmoting FITness and Health through Physical Activity) Research Group, Department of Physical and Sports Education, Faculty of Sports Science, University of Granada, Granada, Spain
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Heine M, Fischer AW, Schlein C, Jung C, Straub LG, Gottschling K, Mangels N, Yuan Y, Nilsson SK, Liebscher G, Chen O, Schreiber R, Zechner R, Scheja L, Heeren J. Lipolysis Triggers a Systemic Insulin Response Essential for Efficient Energy Replenishment of Activated Brown Adipose Tissue in Mice. Cell Metab 2018; 28:644-655.e4. [PMID: 30033199 DOI: 10.1016/j.cmet.2018.06.020] [Citation(s) in RCA: 116] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 04/24/2018] [Accepted: 06/20/2018] [Indexed: 12/31/2022]
Abstract
The coordination of the organ-specific responses regulating systemic energy distribution to replenish lipid stores in acutely activated brown adipose tissue (BAT) remains elusive. Here, we show that short-term cold exposure or acute β3-adrenergic receptor (β3AR) stimulation results in secretion of the anabolic hormone insulin. This process is diminished in adipocyte-specific Atgl-/- mice, indicating that lipolysis in white adipose tissue (WAT) promotes insulin secretion. Inhibition of pancreatic β cells abolished uptake of lipids delivered by triglyceride-rich lipoproteins into activated BAT. Both increased lipid uptake into BAT and whole-body energy expenditure in response to β3AR stimulation were blunted in mice treated with the insulin receptor antagonist S961 or lacking the insulin receptor in brown adipocytes. In conclusion, we introduce the concept that acute cold and β3AR stimulation trigger a systemic response involving WAT, β cells, and BAT, which is essential for insulin-dependent fuel uptake and adaptive thermogenesis.
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Affiliation(s)
- Markus Heine
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Alexander W Fischer
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Christian Schlein
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Caroline Jung
- Department of Diagnostic and Interventional Radiology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Leon G Straub
- Institute of Food, Nutrition and Health, ETH-Zürich, Schorenstrasse 16, 8603 Schwerzenbach, Switzerland
| | - Kristina Gottschling
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Nils Mangels
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Yucheng Yuan
- Department of Chemistry, Brown University, 324 Brook Street, Providence, RI 02912, USA
| | - Stefan K Nilsson
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Gudrun Liebscher
- Biocenter, Division of Cell Biology, Medical University Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Ou Chen
- Department of Chemistry, Brown University, 324 Brook Street, Providence, RI 02912, USA
| | - Renate Schreiber
- Institute of Molecular Biosciences, University of Graz, Heinrichstrasse 31, 8010 Graz, Austria
| | - Rudolf Zechner
- Institute of Molecular Biosciences, University of Graz, Heinrichstrasse 31, 8010 Graz, Austria
| | - Ludger Scheja
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Joerg Heeren
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany.
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86
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Virtanen KA. Activation of Human Brown Adipose Tissue (BAT): Focus on Nutrition and Eating. Handb Exp Pharmacol 2018; 251:349-357. [PMID: 30141098 DOI: 10.1007/164_2018_136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Brown adipose tissue activation occurs most effectively by cold exposure. In the modern world, we do not spend long periods in cold environment, and eating and meals may be other activators of brown fat function. Short-term regulation of brown fat functional activity by eating involves most importantly insulin. Insulin is capable to increase glucose uptake in human brown adipose tissue fivefold to fasting conditions. Oxidative metabolism in brown fat is doubled both by cold and by a meal. Human brown adipose tissue is an insulin-sensitive tissue type, and insulin resistance impairs the function, as is found in obesity. Body weight reduction improves cold-induced activation of human brown adipose tissue.
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Affiliation(s)
- Kirsi A Virtanen
- Turku PET Centre, Turku University Hospital and University of Turku, Turku, Finland. .,Clinical Nutrition, Institute of Public Health and Clinical Nutrition, University of Eastern Finland (UEF), Kuopio, Finland.
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87
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Lahesmaa M, Oikonen V, Helin S, Luoto P, U Din M, Pfeifer A, Nuutila P, Virtanen KA. Regulation of human brown adipose tissue by adenosine and A 2A receptors - studies with [ 15O]H 2O and [ 11C]TMSX PET/CT. Eur J Nucl Med Mol Imaging 2018; 46:743-750. [PMID: 30105585 PMCID: PMC6351510 DOI: 10.1007/s00259-018-4120-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Accepted: 08/01/2018] [Indexed: 12/16/2022]
Abstract
PURPOSE Brown adipose tissue (BAT) has emerged as a potential target to combat obesity and diabetes, but novel strategies to activate BAT are needed. Adenosine and A2A receptor (A2AR) agonism activate BAT in rodents, and endogenous adenosine is released locally in BAT as a by-product of noradrenaline, but physiological data from humans is lacking. The purpose of this pilot study was to investigate the effects of exogenous adenosine on human BAT perfusion, and to determine the density of A2ARs in human BAT in vivo for the first time, using PET/CT imaging. METHODS Healthy, lean men (n = 10) participated in PET/CT imaging with two radioligands. Perfusion of BAT, white adipose tissue (WAT) and muscle was quantified with [15O]H2O at baseline, during cold exposure and during intravenous administration of adenosine. A2AR density of the tissues was quantified with [11C]TMSX at baseline and during cold exposure. RESULTS Adenosine increased the perfusion of BAT even more than cold exposure (baseline 8.3 ± 4.5, cold 19.6 ± 9.3, adenosine 28.6 ± 7.9 ml/100 g/min, p < 0.01). Distribution volume of [11C]TMSX in BAT was significantly lower during cold exposure compared to baseline. In cold, low [11C]TMSX binding coincided with high concentrations of noradrenaline. CONCLUSIONS Adenosine administration caused a maximal perfusion effect in human supraclavicular BAT, indicating increased oxidative metabolism. Cold exposure increased noradrenaline concentrations and decreased the density of A2AR available for radioligand binding in BAT, suggesting augmented release of endogenous adenosine. Our results show that adenosine and A2AR are relevant for activation of human BAT, and A2AR provides a future target for enhancing BAT metabolism.
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Affiliation(s)
- Minna Lahesmaa
- Turku PET Centre, University of Turku, P.O. Box 52, FI-20520, Turku, Finland
- Turku PET Centre, Turku University Hospital, Turku, Finland
| | - Vesa Oikonen
- Turku PET Centre, University of Turku, P.O. Box 52, FI-20520, Turku, Finland
| | - Semi Helin
- Turku PET Centre, University of Turku, P.O. Box 52, FI-20520, Turku, Finland
| | - Pauliina Luoto
- Turku PET Centre, University of Turku, P.O. Box 52, FI-20520, Turku, Finland
| | - Mueez U Din
- Turku PET Centre, University of Turku, P.O. Box 52, FI-20520, Turku, Finland
- Turku PET Centre, Turku University Hospital, Turku, Finland
| | - Alexander Pfeifer
- Institute of Pharmacology and Toxicology, University of Bonn, Bonn, Germany
| | - Pirjo Nuutila
- Turku PET Centre, University of Turku, P.O. Box 52, FI-20520, Turku, Finland
- Department of Endocrinology, Turku University Hospital, Turku, Finland
| | - Kirsi A Virtanen
- Turku PET Centre, University of Turku, P.O. Box 52, FI-20520, Turku, Finland.
- Turku PET Centre, Turku University Hospital, Turku, Finland.
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88
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U Din M, Saari T, Raiko J, Kudomi N, Maurer SF, Lahesmaa M, Fromme T, Amri EZ, Klingenspor M, Solin O, Nuutila P, Virtanen KA. Postprandial Oxidative Metabolism of Human Brown Fat Indicates Thermogenesis. Cell Metab 2018; 28:207-216.e3. [PMID: 29909972 DOI: 10.1016/j.cmet.2018.05.020] [Citation(s) in RCA: 128] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 10/31/2017] [Accepted: 05/22/2018] [Indexed: 12/26/2022]
Abstract
Human studies suggest that a meal elevates glucose uptake in brown adipose tissue (BAT). However, in postprandial state the thermogenic activity and the metabolism of non-esterified fatty acids (NEFAs) in BAT remain unclear. Using indirect calorimetry combined with positron emission tomography and computed tomography (PET/CT), we showed that whole-body and BAT thermogenesis (oxygen consumption) increases after the ingestion of a mixed carbohydrate-rich meal, to the same extent as in cold stress. Postprandial NEFA uptake into BAT is minimal, possibly due to elevated plasma insulin inhibiting lipolysis. However, the variation in postprandial NEFA uptake is linked to BAT thermogenesis. We identified several genes participating in lipid metabolism to be expressed at higher levels in BAT compared with white fat in postprandial state, and to be positively correlated with BAT UCP1 expression. These findings suggest that substrates preferred by BAT in postprandial state are glucose or LPL-released NEFAs due to insulin stimulation.
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Affiliation(s)
- Mueez U Din
- Turku PET Centre, Turku University Hospital, Kiinamyllynkatu 4-8, 20520 Turku, Finland; Turku PET Centre, University of Turku, Kiinamyllynkatu 4-8, 20520 Turku, Finland
| | - Teemu Saari
- Turku PET Centre, Turku University Hospital, Kiinamyllynkatu 4-8, 20520 Turku, Finland; Turku PET Centre, University of Turku, Kiinamyllynkatu 4-8, 20520 Turku, Finland
| | - Juho Raiko
- Turku PET Centre, Turku University Hospital, Kiinamyllynkatu 4-8, 20520 Turku, Finland; Turku PET Centre, University of Turku, Kiinamyllynkatu 4-8, 20520 Turku, Finland
| | - Nobu Kudomi
- Department of Medical Physics, Faculty of Medicine, Kagawa University, Takamatsu, Kagawa, Japan
| | - Stefanie F Maurer
- Chair of Molecular Nutritional Medicine, Else Kröner-Fresenius Center, Technical University of Munich, 85354 Freising, Germany
| | - Minna Lahesmaa
- Turku PET Centre, Turku University Hospital, Kiinamyllynkatu 4-8, 20520 Turku, Finland; Turku PET Centre, University of Turku, Kiinamyllynkatu 4-8, 20520 Turku, Finland
| | - Tobias Fromme
- Chair of Molecular Nutritional Medicine, Else Kröner-Fresenius Center, Technical University of Munich, 85354 Freising, Germany
| | | | - Martin Klingenspor
- Chair of Molecular Nutritional Medicine, Else Kröner-Fresenius Center, Technical University of Munich, 85354 Freising, Germany; ZIEL - Institute for Food and Health, Technical University of Munich, 85354 Freising, Germany
| | - Olof Solin
- Turku PET Centre, Turku University Hospital, Kiinamyllynkatu 4-8, 20520 Turku, Finland; Turku PET Centre, University of Turku, Kiinamyllynkatu 4-8, 20520 Turku, Finland; Department of Chemistry, University of Turku, Turku, Finland; Accelerator Laboratory, Åbo Akademi University, Turku, Finland
| | - Pirjo Nuutila
- Turku PET Centre, Turku University Hospital, Kiinamyllynkatu 4-8, 20520 Turku, Finland; Turku PET Centre, University of Turku, Kiinamyllynkatu 4-8, 20520 Turku, Finland; Department of Endocrinology, Turku University Hospital, Turku, Finland
| | - Kirsi A Virtanen
- Turku PET Centre, Turku University Hospital, Kiinamyllynkatu 4-8, 20520 Turku, Finland; Turku PET Centre, University of Turku, Kiinamyllynkatu 4-8, 20520 Turku, Finland; Institute of Public Health and Clinical Nutrition, University of Eastern Finland (UEF), Kuopio, Finland.
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89
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Carpentier AC, Blondin DP, Virtanen KA, Richard D, Haman F, Turcotte ÉE. Brown Adipose Tissue Energy Metabolism in Humans. Front Endocrinol (Lausanne) 2018; 9:447. [PMID: 30131768 PMCID: PMC6090055 DOI: 10.3389/fendo.2018.00447] [Citation(s) in RCA: 197] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 07/20/2018] [Indexed: 12/16/2022] Open
Abstract
The demonstration of metabolically active brown adipose tissue (BAT) in humans primarily using positron emission tomography coupled to computed tomography (PET/CT) with the glucose tracer 18-fluorodeoxyglucose (18FDG) has renewed the interest of the scientific and medical community in the possible role of BAT as a target for the prevention and treatment of obesity and type 2 diabetes (T2D). Here, we offer a comprehensive review of BAT energy metabolism in humans. Considerable advances in methods to measure BAT energy metabolism, including nonesterified fatty acids (NEFA), chylomicron-triglycerides (TG), oxygen, Krebs cycle rate, and intracellular TG have led to very good quantification of energy substrate metabolism per volume of active BAT in vivo. These studies have also shown that intracellular TG are likely the primary energy source of BAT upon activation by cold. Current estimates of BAT's contribution to energy expenditure range at the lower end of what would be potentially clinically relevant if chronically sustained. Yet, 18FDG PET/CT remains the gold-standard defining method to quantify total BAT volume of activity, used to calculate BAT's total energy expenditure. Unfortunately, BAT glucose metabolism better reflects BAT's insulin sensitivity and blood flow. It is now clear that most glucose taken up by BAT does not fuel mitochondrial oxidative metabolism and that BAT glucose uptake can therefore be disconnected from thermogenesis. Furthermore, BAT thermogenesis is efficiently recruited upon repeated cold exposure, doubling to tripling its total oxidative capacity, with reciprocal reduction of muscle thermogenesis. Recent data suggest that total BAT volume may be much larger than the typically observed 50-150 ml with 18FDG PET/CT. Therefore, the current estimates of total BAT thermogenesis, largely relying on total BAT volume using 18FDG PET/CT, may underestimate the true contribution of BAT to total energy expenditure. Quantification of the contribution of BAT to energy expenditure begs for the development of more integrated whole body in vivo methods.
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Affiliation(s)
- André C. Carpentier
- Division of Endocrinology, Department of Medicine, Centre de Recherche du CHUS, Université de Sherbrooke, Sherbrooke, QC, Canada
| | | | - Kirsi A. Virtanen
- Turku PET Centre, Turku University Hospital, Turku, Finland
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland (UEF), Kuopio, Finland
| | - Denis Richard
- Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Quebec City, QC, Canada
| | - François Haman
- Faculty of Health Sciences, University of Ottawa, Ottawa, ON, Canada
| | - Éric E. Turcotte
- Department of Nuclear Medicine and Radiobiology, Centre de Recherche du CHUS, Université de Sherbrooke, Sherbrooke, QC, Canada
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Ruiz JR, Martinez-Tellez B, Sanchez-Delgado G, Osuna-Prieto FJ, Rensen PCN, Boon MR. Role of Human Brown Fat in Obesity, Metabolism and Cardiovascular Disease: Strategies to Turn Up the Heat. Prog Cardiovasc Dis 2018; 61:232-245. [PMID: 29981351 DOI: 10.1016/j.pcad.2018.07.002] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Accepted: 07/01/2018] [Indexed: 11/17/2022]
Abstract
Human brown adipose tissue (BAT) was re-discovered in 2009 by several independent groups, who showed that it is present and active in adults, as judged from the profound uptake of the glucose analogue radiotracer 18F-fluorodeoxyglucose in positron-emission tomography and computed tomography scan analysis after cold exposure. A potential clinical implication of activating BAT relates to its high metabolic activity and its potential role in stimulating energy expenditure (i.e. resting energy expenditure, meal-induced thermogenesis, and cold-induced thermogenesis), which makes it an attractive target to reduce adiposity. Moreover, due to its ability to oxidise glucose and lipids, BAT activation may also potentially exert beneficial metabolic and cardiovascular effects through reducing glucose and lipid levels, respectively. This review describes the potential role of human BAT in the prevention and treatment of obesity, metabolism, and cardiovascular disease focusing on its impact on energy expenditure and management of body fat accumulation as well as on glucose and lipid metabolism. This article also summarises the strategies that are currently being studied to activate human BAT.
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Affiliation(s)
- Jonatan R Ruiz
- PROFITH (PROmoting FITness and Health through Physical Activity) Research Group, Department of Physical and Sports Education, Faculty of Sports Science, University of Granada, Granada, Spain.
| | - Borja Martinez-Tellez
- PROFITH (PROmoting FITness and Health through Physical Activity) Research Group, Department of Physical and Sports Education, Faculty of Sports Science, University of Granada, Granada, Spain; Department of Medicine, Division of Endocrinology, Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Guillermo Sanchez-Delgado
- PROFITH (PROmoting FITness and Health through Physical Activity) Research Group, Department of Physical and Sports Education, Faculty of Sports Science, University of Granada, Granada, Spain
| | - Francisco J Osuna-Prieto
- PROFITH (PROmoting FITness and Health through Physical Activity) Research Group, Department of Physical and Sports Education, Faculty of Sports Science, University of Granada, Granada, Spain; Department of Analytical Chemistry, University of Granada, Avda Fuentenueva s/n, 18071 Granada, Spain; Research and Development of Functional Food Centre (CIDAF), Granada, Spain
| | - Patrick C N Rensen
- Department of Medicine, Division of Endocrinology, Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Mariëtte R Boon
- Department of Medicine, Division of Endocrinology, Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
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91
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Lahesmaa M, Eriksson O, Gnad T, Oikonen V, Bucci M, Hirvonen J, Koskensalo K, Teuho J, Niemi T, Taittonen M, Lahdenpohja S, U Din M, Haaparanta-Solin M, Pfeifer A, Virtanen KA, Nuutila P. Cannabinoid Type 1 Receptors Are Upregulated During Acute Activation of Brown Adipose Tissue. Diabetes 2018; 67:1226-1236. [PMID: 29650773 DOI: 10.2337/db17-1366] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 04/02/2018] [Indexed: 11/13/2022]
Abstract
Activating brown adipose tissue (BAT) could provide a potential approach for the treatment of obesity and metabolic disease in humans. Obesity is associated with upregulation of the endocannabinoid system, and blocking the cannabinoid type 1 receptor (CB1R) has been shown to cause weight loss and to decrease cardiometabolic risk factors. These effects may be mediated partly via increased BAT metabolism, since there is evidence that CB1R antagonism activates BAT in rodents. To investigate the significance of CB1R in BAT function, we quantified the density of CB1R in human and rodent BAT using the positron emission tomography radioligand [18F]FMPEP-d2 and measured BAT activation in parallel with the glucose analog [18F]fluorodeoxyglucose. Activation by cold exposure markedly increased CB1R density and glucose uptake in the BAT of lean men. Similarly, β3-receptor agonism increased CB1R density in the BAT of rats. In contrast, overweight men with reduced BAT activity exhibited decreased CB1R in BAT, reflecting impaired endocannabinoid regulation. Image-guided biopsies confirmed CB1R mRNA expression in human BAT. Furthermore, CB1R blockade increased glucose uptake and lipolysis of brown adipocytes. Our results highlight that CB1Rs are significant for human BAT activity, and the CB1Rs provide a novel therapeutic target for BAT activation in humans.
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Affiliation(s)
- Minna Lahesmaa
- Turku PET Centre, University of Turku, Turku, Finland
- Turku PET Centre, Turku University Hospital, Turku, Finland
| | - Olof Eriksson
- Turku PET Centre, Åbo Akademi, Turku, Finland
- Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden
| | - Thorsten Gnad
- Institute of Pharmacology and Toxicology, University of Bonn, Bonn, Germany
| | - Vesa Oikonen
- Turku PET Centre, University of Turku, Turku, Finland
| | - Marco Bucci
- Turku PET Centre, University of Turku, Turku, Finland
| | - Jussi Hirvonen
- Turku PET Centre, University of Turku, Turku, Finland
- Department of Radiology, University of Turku, Turku, Finland
| | - Kalle Koskensalo
- Turku PET Centre, University of Turku, Turku, Finland
- Turku PET Centre, Turku University Hospital, Turku, Finland
| | - Jarmo Teuho
- Turku PET Centre, Turku University Hospital, Turku, Finland
| | - Tarja Niemi
- Department of Plastic and General Surgery, Turku University Hospital, Turku, Finland
| | - Markku Taittonen
- Department of Anesthesiology, Turku University Hospital, Turku, Finland
| | | | - Mueez U Din
- Turku PET Centre, University of Turku, Turku, Finland
| | - Merja Haaparanta-Solin
- Turku PET Centre, University of Turku, Turku, Finland
- MediCity Research Laboratories, University of Turku, Turku, Finland
| | - Alexander Pfeifer
- Institute of Pharmacology and Toxicology, University of Bonn, Bonn, Germany
| | - Kirsi A Virtanen
- Turku PET Centre, University of Turku, Turku, Finland
- Turku PET Centre, Turku University Hospital, Turku, Finland
| | - Pirjo Nuutila
- Turku PET Centre, University of Turku, Turku, Finland
- Department of Endocrinology, Turku University Hospital, Turku, Finland
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92
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Acosta FM, Berchem J, Martinez-Tellez B, Sanchez-Delgado G, Alcantara JMA, Ortiz-Alvarez L, Hamaoka T, Ruiz JR. Near-Infrared Spatially Resolved Spectroscopy as an Indirect Technique to Assess Brown Adipose Tissue in Young Women. Mol Imaging Biol 2018; 21:328-338. [DOI: 10.1007/s11307-018-1244-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Abstract
PURPOSE OF REVIEW This article explores how the interplay between lipid metabolism and thermogenic adipose tissues enables proper physiological adaptation to cold environments in rodents and humans. RECENT FINDINGS Cold exposure triggers systemic changes in lipid metabolism, which increases fatty acid delivery to brown adipose tissue (BAT) by various routes. Next to fatty acids generated intracellularly by de-novo lipogenesis or by lipolysis at lipid droplets, brown adipocytes utilize fatty acids released by white adipose tissue (WAT) for adaptive thermogenesis. WAT-derived fatty acids are internalized directly by BAT, or indirectly after hepatic conversion to very low-density lipoproteins and acylcarnitines. In the postprandial state, chylomicrons hydrolyzed by lipoprotein lipase - activated specifically in thermogenic adipocytes - are the predominant fatty acid source. Cholesterol-enriched chylomicron remnants and HDL generated by intravascular lipolysis in BAT are cleared more rapidly by the liver, explaining the antiatherogenic effects of BAT activation. Notably, increased cholesterol flux and elevated hepatic synthesis of bile acids under cold exposure further promote BAT-dependent thermogenesis. SUMMARY Although pathways providing fatty acids for activated BAT have been identified, more research is needed to understand the integration of lipid metabolism in BAT, WAT and liver, and to determine the relevance of BAT for human energy metabolism.
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Affiliation(s)
- Joerg Heeren
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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94
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Lee JH, Kim JM, Choi MJ, Kang YE, Joung KH, Yi HS, Kim KS, Ku BJ, Koo BS, Shong M, Kim HJ. Clinical Implications of UCP1 mRNA Expression in Human Cervical Adipose Tissue Under Physiological Conditions. Obesity (Silver Spring) 2018; 26:1008-1016. [PMID: 29698580 DOI: 10.1002/oby.22188] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 03/13/2018] [Accepted: 03/14/2018] [Indexed: 12/16/2022]
Abstract
OBJECTIVE The clinical implications of human brown adipose tissue (BAT) were investigated based on the analysis of cervical adipose tissue gene expression under normal physiological conditions. METHODS Matched-pair specimens of adipose tissue (AT) were collected from beneath the incision plane (subcutaneous AT) and from the area surrounding the carotid sheath (carotid AT) from 60 patients undergoing thyroidectomy. The mRNA expression of BAT-associated genes in these tissues was examined, and this expression was correlated with the clinical characteristics of the subjects. RESULTS The UCP1 mRNA level was significantly higher in the carotid AT than in the subcutaneous AT. There was an inverse correlation between subject age and the ratio of UCP1 mRNA expression in the carotid AT relative to the subcutaneous AT, which is a measure of BAT activity (r = -0.459; P = 0.004), and there was a negative correlation between BMI and the ratio of UCP1 mRNA expression in subjects with higher BAT activity (r = -0.532; P = 0.016). CONCLUSIONS UCP1 was identified as the only marker of cervical BAT in humans. There was a negative correlation between obesity and BAT activity in subjects with higher BAT activity, although BAT activity decreased with age.
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Affiliation(s)
- Ju Hee Lee
- Department of Internal Medicine, Chungnam National University Hospital, Daejeon, Republic of Korea
- Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, Republic of Korea
| | - Ji Min Kim
- Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, Republic of Korea
| | - Min Jeong Choi
- Department of Medicine Science, Chungnam National University School of Medicine, Daejeon, Republic of Korea
| | - Yea Eun Kang
- Department of Internal Medicine, Chungnam National University Hospital, Daejeon, Republic of Korea
- Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, Republic of Korea
| | - Kyoung Hye Joung
- Department of Internal Medicine, Chungnam National University Hospital, Daejeon, Republic of Korea
- Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, Republic of Korea
| | - Hyon-Seung Yi
- Department of Internal Medicine, Chungnam National University Hospital, Daejeon, Republic of Korea
| | - Koon Soon Kim
- Department of Internal Medicine, Chungnam National University Hospital, Daejeon, Republic of Korea
- Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, Republic of Korea
| | - Bon Jeong Ku
- Department of Internal Medicine, Chungnam National University Hospital, Daejeon, Republic of Korea
- Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, Republic of Korea
| | - Bon Seok Koo
- Department of Otorhinolaryngology-Head and Neck Surgery, Chungnam National University School of Medicine, Daejeon, Republic of Korea
| | - Minho Shong
- Department of Internal Medicine, Chungnam National University Hospital, Daejeon, Republic of Korea
- Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, Republic of Korea
| | - Hyun Jin Kim
- Department of Internal Medicine, Chungnam National University Hospital, Daejeon, Republic of Korea
- Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, Republic of Korea
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95
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Recent advances in the detection of brown adipose tissue in adult humans: a review. Clin Sci (Lond) 2018; 132:1039-1054. [PMID: 29802209 DOI: 10.1042/cs20170276] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 03/23/2018] [Accepted: 03/23/2018] [Indexed: 02/07/2023]
Abstract
The activation of brown adipose tissue (BAT) is associated with reductions in circulating lipids and glucose in rodents and contributes to energy expenditure in humans indicating the potential therapeutic importance of targetting this tissue for the treatment of a variety of metabolic disorders. In order to evaluate the therapeutic potential of human BAT, a variety of methodologies for assessing the volume and metabolic activity of BAT are utilized. Cold exposure is often utilized to increase BAT activity but inconsistencies in the characteristics of the exposure protocols make it challenging to compare findings. The metabolic activity of BAT in response to cold exposure has most commonly been measured by static positron emission tomography of 18F-fluorodeoxyglucose in combination with computed tomography (18F-FDG PET-CT) imaging, but recent studies suggest that under some conditions this may not always reflect BAT thermogenic activity. Therefore, recent studies have used alternative positron emission tomography and computed tomography (PET-CT) imaging strategies and radiotracers that may offer important insights. In addition to PET-CT, there are numerous emerging techniques that may have utility for assessing BAT metabolic activity including magnetic resonance imaging (MRI), skin temperature measurements, near-infrared spectroscopy (NIRS) and contrast ultrasound (CU). In this review, we discuss and critically evaluate the various methodologies used to measure BAT metabolic activity in humans and provide a contemporary assessment of protocols which may be useful in interpreting research findings and guiding the development of future studies.
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96
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Emont MP, Kim DI, Wu J. Development, activation, and therapeutic potential of thermogenic adipocytes. Biochim Biophys Acta Mol Cell Biol Lipids 2018; 1864:13-19. [PMID: 29763732 DOI: 10.1016/j.bbalip.2018.05.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 02/23/2018] [Accepted: 05/10/2018] [Indexed: 01/28/2023]
Abstract
During the last decade, significant progress has been made in understanding adipocytes with a particular focus on thermogenic fat cells, which effectively convert chemical energy into heat in addition to their other metabolic functions. It has been increasingly recognized that different types and subtypes of adipocytes exist and the developmental origins of various types of fat cells are being intensively investigated. Previous work using immortalized fat cell lines has established an intricate transcriptional network that regulates adipocyte function. Recent work has illustrated how these key transcriptional components mediate thermogenic activation in fat cells. Last but not least, cumulative evidence supports an incontestable role of thermogenic fat in influencing systemic metabolism in humans. Here we summarize the exciting advancements in our understanding of thermogenic fat, discuss the advantages and limitations of the experimental tools currently available, and explore the future directions of this fast-evolving field.
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Affiliation(s)
- Margo P Emont
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA; Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Dong-Il Kim
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jun Wu
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA; Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI 48109, USA.
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97
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Steensels S, Ersoy BA. Fatty acid activation in thermogenic adipose tissue. Biochim Biophys Acta Mol Cell Biol Lipids 2018; 1864:79-90. [PMID: 29793055 DOI: 10.1016/j.bbalip.2018.05.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Revised: 03/10/2018] [Accepted: 05/17/2018] [Indexed: 02/07/2023]
Abstract
Channeling carbohydrates and fatty acids to thermogenic tissues, including brown and beige adipocytes, have garnered interest as an approach for the management of obesity-related metabolic disorders. Mitochondrial fatty acid oxidation (β-oxidation) is crucial for the maintenance of thermogenesis. Upon cellular fatty acid uptake or following lipolysis from triglycerides (TG), fatty acids are esterified to coenzyme A (CoA) to form active acyl-CoA molecules. This enzymatic reaction is essential for their utilization in β-oxidation and thermogenesis. The activation and deactivation of fatty acids are regulated by two sets of enzymes called acyl-CoA synthetases (ACS) and acyl-CoA thioesterases (ACOT), respectively. The expression levels of ACS and ACOT family members in thermogenic tissues will determine the substrate availability for β-oxidation, and consequently the thermogenic capacity. Although the role of the majority of ACS and ACOT family members in thermogenesis remains unclear, recent proceedings link the enzymatic activities of ACS and ACOT family members to metabolic disorders and thermogenesis. Elucidating the contributions of specific ACS and ACOT family members to trafficking of fatty acids towards thermogenesis may reveal novel targets for modulating thermogenic capacity and treating metabolic disorders.
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Affiliation(s)
- Sandra Steensels
- Department of Medicine, Division of Gastroenterology and Hepatology, Weill Cornell Medical College, New York, NY, USA
| | - Baran A Ersoy
- Department of Medicine, Division of Gastroenterology and Hepatology, Weill Cornell Medical College, New York, NY, USA.
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98
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Acosta FM, Martinez-Tellez B, Sanchez-Delgado G, A. Alcantara JM, Acosta-Manzano P, Morales-Artacho AJ, R. Ruiz J. Physiological responses to acute cold exposure in young lean men. PLoS One 2018; 13:e0196543. [PMID: 29734360 PMCID: PMC5937792 DOI: 10.1371/journal.pone.0196543] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Accepted: 04/14/2018] [Indexed: 01/21/2023] Open
Abstract
The aim of this study was to comprehensively describe the physiological responses to an acute bout of mild cold in young lean men (n = 11, age: 23 ± 2 years, body mass index: 23.1 ± 1.2 kg/m2) to better understand the underlying mechanisms of non-shivering thermogenesis and how it is regulated. Resting energy expenditure, substrate metabolism, skin temperature, thermal comfort perception, superficial muscle activity, hemodynamics of the forearm and abdominal regions, and heart rate variability were measured under warm conditions (22.7 ± 0.2°C) and during an individualized cooling protocol (air-conditioning and water cooling vest) in a cold room (19.4 ± 0.1°C). The temperature of the cooling vest started at 16.6°C and decreased ~ 1.4°C every 10 minutes until participants shivered (93.5 ± 26.3 min). All measurements were analysed across 4 periods: warm period, at 31% and at 64% of individual´s cold exposure time until shivering occurred, and at the shivering threshold. Energy expenditure increased from warm period to 31% of cold exposure by 16.7% (P = 0.078) and to the shivering threshold by 31.7% (P = 0.023). Fat oxidation increased by 72.6% from warm period to 31% of cold exposure (P = 0.004), whereas no changes occurred in carbohydrates oxidation. As shivering came closer, the skin temperature and thermal comfort perception decreased (all P<0.05), except in the supraclavicular skin temperature, which did not change (P>0.05). Furthermore, the superficial muscle activation increased at the shivering threshold. It is noteworthy that the largest physiological changes occurred during the first 30 minutes of cold exposure, when the participants felt less discomfort.
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Affiliation(s)
- Francisco M. Acosta
- PROFITH “PROmoting FITness and Health through physical activity” research group, Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Borja Martinez-Tellez
- PROFITH “PROmoting FITness and Health through physical activity” research group, Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
- Department of Medicine, Division of Endocrinology, Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Guillermo Sanchez-Delgado
- PROFITH “PROmoting FITness and Health through physical activity” research group, Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Juan M. A. Alcantara
- PROFITH “PROmoting FITness and Health through physical activity” research group, Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Pedro Acosta-Manzano
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Antonio J. Morales-Artacho
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Jonatan R. Ruiz
- PROFITH “PROmoting FITness and Health through physical activity” research group, Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
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99
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Heinonen I, Laukkanen JA. Effects of heat and cold on health, with special reference to Finnish sauna bathing. Am J Physiol Regul Integr Comp Physiol 2018; 314:R629-R638. [DOI: 10.1152/ajpregu.00115.2017] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Environmental stress such as extremely warm or cold temperature is often considered a challenge to human health and body homeostasis. However, the human body can adapt relatively well to heat and cold environments, and recent studies have also elucidated that particularly heat stress might be even highly beneficial for human health. Consequently, the aim of the present brief review is first to discuss general cardiovascular and other responses to acute heat stress, followed by a review of beneficial effects of Finnish sauna bathing on general and cardiovascular health and mortality as well as dementia and Alzheimer's disease risk. Plausible mechanisms included are improved endothelial and microvascular function, reduced blood pressure and arterial stiffness, and possibly increased angiogenesis in humans, which are likely to mediate the health benefits of sauna bathing. In addition to heat exposure with physiological adaptations, cold stress-induced physiological responses and brown fat activation on health are also discussed. This is important to take into consideration, as sauna bathing is frequently associated with cooling periods in cold(er) environments, but their combination remains poorly investigated. We finally propose, therefore, that possible additive effects of heat- and cold-stress-induced adaptations and effects on health would be worthy of further investigation.
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Affiliation(s)
- Ilkka Heinonen
- Turku PET Centre, University of Turku, Turku, Finland
- Department of Clinical Physiology and Nuclear Medicine, University of Turku, Turku, Finland
- Division of Experimental Cardiology, Thoraxcenter, Erasmus Medical Center, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Jari A. Laukkanen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
- Central Finland Health Care District, Jyväskylä, Finland
- Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
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100
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Singh AK, Aryal B, Chaube B, Rotllan N, Varela L, Horvath TL, Suárez Y, Fernández-Hernando C. Brown adipose tissue derived ANGPTL4 controls glucose and lipid metabolism and regulates thermogenesis. Mol Metab 2018; 11:59-69. [PMID: 29627378 PMCID: PMC6001401 DOI: 10.1016/j.molmet.2018.03.011] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 03/20/2018] [Accepted: 03/23/2018] [Indexed: 12/31/2022] Open
Abstract
Objectives Brown adipose tissue (BAT) controls triglyceride-rich lipoprotein (TRL) catabolism. This process is mediated by the lipoprotein lipase (LPL), an enzyme that catalyzed the hydrolysis of triglyceride (TAG) in glycerol and fatty acids (FA), which are burned to generate heat. LPL activity is regulated by angiopoietin-like 4 (ANGPTL4), a secretory protein produced in adipose tissues (AT), liver, kidney, and muscle. While the role of ANGPTL4 in regulating lipoprotein metabolism is well established, the specific contribution of BAT derived ANGPTL4 in controlling lipid and glucose homeostasis is not well understood. Methods and results We generated a novel mouse model lacking ANGPTL4 specifically in brown adipose tissue (BAT-KO). Here, we report that specific deletion of ANGPTL4 in BAT results in enhanced LPL activity, circulating TAG clearance and thermogenesis. Absence of ANGPTL4 in BAT increased FA oxidation and reduced FA synthesis. Importantly, we observed that absence of ANGPTL4 in BAT leads to a remarkable improvement in glucose tolerance in short-term HFD feeding. Conclusion Our findings demonstrate an important role of BAT derived ANGPTL4 in regulating lipoprotein metabolism, whole-body lipid and glucose metabolism, and thermogenesis during acute cold exposure. Absence of ANGPTL4 in brown adipose tissue reduces circulating triglycerides. Loss of ANGPTL4 in brown adipose tissue enhances glucose tolerance and insulin sensitivity. Lack of ANGPTL4 in brown adipose tissue improves thermogenesis in response to acute cold exposure.
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Affiliation(s)
- Abhishek K Singh
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT, USA; Integrative Cell Signaling and Neurobiology of Metabolism Program, Department of Comparative Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Binod Aryal
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT, USA; Integrative Cell Signaling and Neurobiology of Metabolism Program, Department of Comparative Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Balkrishna Chaube
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT, USA; Integrative Cell Signaling and Neurobiology of Metabolism Program, Department of Comparative Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Noemi Rotllan
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT, USA; Integrative Cell Signaling and Neurobiology of Metabolism Program, Department of Comparative Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Luis Varela
- Integrative Cell Signaling and Neurobiology of Metabolism Program, Department of Comparative Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Tamas L Horvath
- Integrative Cell Signaling and Neurobiology of Metabolism Program, Department of Comparative Medicine, Yale University School of Medicine, New Haven, CT, USA; Department of Anatomy and Histology, University of Veterinary Medicine, Budapest, Hungary
| | - Yajaira Suárez
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT, USA; Integrative Cell Signaling and Neurobiology of Metabolism Program, Department of Comparative Medicine, Yale University School of Medicine, New Haven, CT, USA; Department of Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Carlos Fernández-Hernando
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT, USA; Integrative Cell Signaling and Neurobiology of Metabolism Program, Department of Comparative Medicine, Yale University School of Medicine, New Haven, CT, USA; Department of Pathology, Yale University School of Medicine, New Haven, CT, USA.
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