51
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Oyama S, Arslanian KJ, Levy SB, Ocobock CJ, Fidow UT, Naseri T, Hawley NL. Feasibility of using infrared thermal imaging to examine brown adipose tissue in infants aged 18 to 25 months. Ann Hum Biol 2021; 48:374-381. [PMID: 34781801 DOI: 10.1080/03014460.2021.1985607] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND Recent studies in adults indicate that cold-induced temperature change of supraclavicular skin corresponds with brown adipose tissue (BAT) thermogenesis. AIM This study examined the feasibility of using thermography to assess temperature changes in infants aged 18-25 months after mild cooling. Further, this study sought to evaluate whether cold exposure induces a thermal response suggestive of BAT activity underlying the supraclavicular region. SUBJECTS AND METHODS Changes in maximum skin temperature at the supraclavicular and interscapular regions were determined using thermal imaging following a mild 5-minute cooling condition (by removal of clothes in a climate-controlled room) in 67 Samoan infants. Temperature changes of the forehead and hand, known BAT-free regions, served as indicators of cooling efficacy. RESULTS Infants with increased hand and forehead temperatures after cold exposure were excluded from analysis, reducing the effective sample size to 19 infants. On average, forehead (p < 0.001), hand (p < 0.001) and back (0.029) temperatures dropped significantly while supraclavicular temperatures remained constant. Participants with greater decreases in forehead temperature tended to exhibit greater supraclavicular thermogenesis (p = 0.084), suggesting potential BAT activity in this region. CONCLUSIONS While further work is necessary to develop a reliable cooling condition, this study provides proof-of-concept for non-invasive assessment of BAT activity in infants.
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Affiliation(s)
- Sakurako Oyama
- Department of Anthropology, Yale University, New Haven, CT, USA.,Yale School of Medicine, Yale University, New Haven, CT, USA
| | - Kendall J Arslanian
- Department of Anthropology, Yale University, New Haven, CT, USA.,Department of Chronic Disease Epidemiology, Yale School of Public Health, New Haven, CT, USA
| | - Stephanie B Levy
- New York Consortium in Evolutionary Primatology, New York City, NY, USA
| | - Cara J Ocobock
- Department of Anthropology, University of Notre Dame, Notre Dame, IN, USA
| | - Ulai T Fidow
- Department of Obstetrics & Gynecology, Tupua Tamasese Meaole Hospital, Samoa National Health Service, Apia, Samoa
| | | | - Nicola L Hawley
- Department of Anthropology, Yale University, New Haven, CT, USA.,Department of Chronic Disease Epidemiology, Yale School of Public Health, New Haven, CT, USA
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52
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Hu Y, Liu Y, Yang Y, Lv H, Lian S, Xu B, Li S. OGT upregulates myogenic IL-6 by mediating O-GlcNAcylation of p65 in mouse skeletal muscle under cold exposure. J Cell Physiol 2021; 237:1341-1352. [PMID: 34668190 DOI: 10.1002/jcp.30612] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 09/17/2021] [Accepted: 09/23/2021] [Indexed: 12/29/2022]
Abstract
Cold exposure is an unavoidable and severe challenge for people and animals residing in cold regions of the world, and may lead to hypothermia, drastic changes in systemic metabolism, and inhibition of protein synthesis. O-linked-N-acetylglucoseaminylation (O-GlcNAcylation) directly regulates the activity and function of target proteins involved in multiple biological processes by acting as a stress receptor and nutrient sensor. Therefore, our study aimed to examine whether O-GlcNAcylation affected myogenic IL-6 expression, regulation of energy metabolism, and promotion of survival in mouse skeletal muscle under acute cold exposure conditions. Total protein was extracted from C2C12 cells that had been cultured at 32°C for 3, 6, 9, and 12 h. Western blot analysis showed that mild hypothermia enhanced O-GlcNAc transferase (OGT) and O-GlcNAcase (OGA) expression. Furthermore, global OGT-dependent glycosylation and interleukin-6 (IL-6) levels peaked 3 h after induction of mild hypothermia. Enhanced activation of the NF-κB pathway was also observed in response to mild hypothermia. Alloxan and Thiamet G were used to reduce and increase global OGT glycosylation levels in C2C12 cells, respectively. Increased O-GlcNAcylation was associated with significant upregulation of IL-6 expression, as well as enhanced activity and nuclear translocation of p65, while decreased O-GlcNAcylation had the opposite effect. In addition, increased O-GlcNAcylation was associated with significantly increased glucose metabolism, and OGT-mediated O-GlcNAcylation of p65. We generated skeletal muscle-specific OGT knockout mice and exposed them to cold at 4°C for 3 h per day for 1 week. OGT deficiency attenuated the O-GlcNAcylation, activity, and nuclear translocation of p65, resulting in downregulation of IL-6 in mouse skeletal muscle of mice exposed to cold conditions. Taken together, our data suggested that O-GlcNAcylation of p65 enhanced p65 activity and nuclear translocation leading to the upregulation of IL-6, which maintained energy homeostasis and promotes cell survival in mouse skeletal muscle during cold exposure.
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Affiliation(s)
- Yajie Hu
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Yang Liu
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Yuying Yang
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Hongming Lv
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Shuai Lian
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Bin Xu
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Shize Li
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
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53
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Søberg S, Löfgren J, Philipsen FE, Jensen M, Hansen AE, Ahrens E, Nystrup KB, Nielsen RD, Sølling C, Wedell-Neergaard AS, Berntsen M, Loft A, Kjær A, Gerhart-Hines Z, Johannesen HH, Pedersen BK, Karstoft K, Scheele C. Altered brown fat thermoregulation and enhanced cold-induced thermogenesis in young, healthy, winter-swimming men. CELL REPORTS MEDICINE 2021; 2:100408. [PMID: 34755128 PMCID: PMC8561167 DOI: 10.1016/j.xcrm.2021.100408] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 07/13/2021] [Accepted: 09/17/2021] [Indexed: 12/18/2022]
Abstract
The Scandinavian winter-swimming culture combines brief dips in cold water with hot sauna sessions, with conceivable effects on body temperature. We study thermogenic brown adipose tissue (BAT) in experienced winter-swimming men performing this activity 2–3 times per week. Our data suggest a lower thermal comfort state in the winter swimmers compared with controls, with a lower core temperature and absence of BAT activity. In response to cold, we observe greater increases in cold-induced thermogenesis and supraclavicular skin temperature in the winter swimmers, whereas BAT glucose uptake and muscle activity increase similarly to those of the controls. All subjects demonstrate nocturnal reduction in supraclavicular skin temperature, whereas a distinct peak occurs at 4:30–5:30 a.m. in the winter swimmers. Our data leverage understanding of BAT in adult human thermoregulation, suggest both heat and cold acclimation in winter swimmers, and propose winter swimming as a potential strategy for increasing energy expenditure. Winter swimmers have a lower core temperature at a thermal comfort state than controls Winter swimmers had no BAT glucose uptake at a thermal comfort state Winter swimmers have higher cold-induced thermogenesis than control subjects Human supraclavicular skin temperature varies with a diurnal rhythm
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Affiliation(s)
- Susanna Søberg
- The Center of Inflammation and Metabolism and the Center for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen 2100, Denmark.,Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Johan Löfgren
- Department of Clinical Physiology, Nuclear Medicine & PET, and Cluster for Molecular Imaging, Rigshospitalet and University of Copenhagen, Copenhagen 2100, Denmark
| | - Frederik E Philipsen
- Department of Clinical Physiology, Nuclear Medicine & PET, and Cluster for Molecular Imaging, Rigshospitalet and University of Copenhagen, Copenhagen 2100, Denmark
| | - Michal Jensen
- The Center of Inflammation and Metabolism and the Center for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen 2100, Denmark
| | - Adam E Hansen
- Department of Clinical Physiology, Nuclear Medicine & PET, and Cluster for Molecular Imaging, Rigshospitalet and University of Copenhagen, Copenhagen 2100, Denmark
| | - Esben Ahrens
- Department of Neurophysiology, Rigshospitalet, Copenhagen 2100, Denmark
| | - Kristin B Nystrup
- Department of Neuroanaesthesiology, Rigshospitalet, Copenhagen 2100, Denmark
| | - Rune D Nielsen
- Department of Neuroanaesthesiology, Rigshospitalet, Copenhagen 2100, Denmark
| | - Christine Sølling
- Department of Neuroanaesthesiology, Rigshospitalet, Copenhagen 2100, Denmark
| | - Anne-Sophie Wedell-Neergaard
- The Center of Inflammation and Metabolism and the Center for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen 2100, Denmark
| | - Marianne Berntsen
- Department of Neuroanaesthesiology, Rigshospitalet, Copenhagen 2100, Denmark
| | - Annika Loft
- Department of Clinical Physiology, Nuclear Medicine & PET, and Cluster for Molecular Imaging, Rigshospitalet and University of Copenhagen, Copenhagen 2100, Denmark
| | - Andreas Kjær
- Department of Clinical Physiology, Nuclear Medicine & PET, and Cluster for Molecular Imaging, Rigshospitalet and University of Copenhagen, Copenhagen 2100, Denmark
| | - Zachary Gerhart-Hines
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Helle H Johannesen
- Department of Clinical Physiology, Nuclear Medicine & PET, and Cluster for Molecular Imaging, Rigshospitalet and University of Copenhagen, Copenhagen 2100, Denmark
| | - Bente K Pedersen
- The Center of Inflammation and Metabolism and the Center for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen 2100, Denmark
| | - Kristian Karstoft
- The Center of Inflammation and Metabolism and the Center for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen 2100, Denmark.,Department of Clinical Pharmacology, Bispebjerg Hospital, Copenhagen 2400, Denmark
| | - Camilla Scheele
- The Center of Inflammation and Metabolism and the Center for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen 2100, Denmark.,Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
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54
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Yoneshiro T, Matsushita M, Sugita J, Aita S, Kameya T, Sugie H, Saito M. Prolonged Treatment with Grains of Paradise (Aframomum melegueta) Extract Recruits Adaptive Thermogenesis and Reduces Body Fat in Humans with Low Brown Fat Activity. J Nutr Sci Vitaminol (Tokyo) 2021; 67:99-104. [PMID: 33952741 DOI: 10.3177/jnsv.67.99] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Increasing adaptive thermogenesis through the activation of brown adipose tissue (BAT) is a promising practical strategy for preventing obesity and related disorders. Ingestion of a single dose of 40 mg of an extract of Grains of Paradise (GP), a ginger family species, reportedly triggers BAT thermogenesis in individuals with high but not in those with low BAT activity. We hypothesized that prolonged treatment with GP might revive BAT in individuals who have lost active BAT. In the present study, we recruited 9 healthy young male volunteers with reduced BAT that was assessed by fluorodeoxyglucose positron emission tomography and computed tomography (FDG-PET/CT) following 2-h cold exposure at 19ºC. The subjects ingested GP extract (40 mg/d) or placebo every day for 5 wk. Before and after the treatment with either GP or placebo, their body composition and BAT-dependent cold-induced thermogenesis (CIT)-a non-invasive index of BAT-were measured in a single-blinded, randomized, placebo-controlled cross-over design. Their whole-body resting energy expenditure at a thermoneutral condition remained unchanged following GP treatment. However, CIT after treatment was significantly higher in GP-treated individuals than in placebo-treated individuals. Body weight and fat-free mass did not change significantly following GP or placebo treatment. Notably, body fat percentage slightly but significantly decreased after GP treatment but not after placebo treatment. These results suggest that repeated ingestion of GP elevates adaptive thermogenesis through the re-activation of BAT, thereby reducing body fat in individuals with low BAT activity.
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Affiliation(s)
- Takeshi Yoneshiro
- Department of Nutrition, School of Nursing and Nutrition, Tenshi Collage.,Division of Metabolic Medicine, Research Center for Advanced Science and Technology, The University of Tokyo
| | - Mami Matsushita
- Department of Nutrition, School of Nursing and Nutrition, Tenshi Collage
| | - Jun Sugita
- Department of Nutrition, School of Nursing and Nutrition, Tenshi Collage.,R&D Management, Kao Corporation
| | - Sayuri Aita
- Department of Food and Health Sciences, College of Life Sciences, Ibaraki Christian University
| | | | | | - Masayuki Saito
- Department of Nutrition, School of Nursing and Nutrition, Tenshi Collage.,Faculty of Veterinary Medicine, Hokkaido University
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55
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Liu Y, Liu P, Hu Y, Cao Y, Lu J, Yang Y, Lv H, Lian S, Xu B, Li S. Cold-Induced RNA-Binding Protein Promotes Glucose Metabolism and Reduces Apoptosis by Increasing AKT Phosphorylation in Mouse Skeletal Muscle Under Acute Cold Exposure. Front Mol Biosci 2021; 8:685993. [PMID: 34395524 PMCID: PMC8358400 DOI: 10.3389/fmolb.2021.685993] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 07/13/2021] [Indexed: 11/13/2022] Open
Abstract
The main danger of cold stress to animals in cold regions is systemic metabolic changes and protein synthesis inhibition. Cold-induced RNA-binding protein is a cold shock protein that is rapidly up-regulated under cold stimulation in contrast to the inhibition of most proteins and participates in multiple cellular physiological activities by regulating targets. Therefore, this study was carried out to investigate the possible mechanism of CIRP-mediated glucose metabolism regulation and survival promotion in skeletal muscle after acute cold exposure. Skeletal muscle and serum from mice were obtained after 0, 2, 4 and 8 h of acute hypothermia exposure. Subsequently, the changes of CIRP, metabolism and apoptosis were examined. Acute cold exposure increased energy consumption, enhanced glycolysis, increased apoptosis, and up-regulated CIRP and phosphorylation of AKT. In addition, CIRP overexpression in C2C12 mouse myoblasts at each time point under 37°C and 32°C mild hypothermia increased AKT phosphorylation, enhanced glucose metabolism, and reduced apoptosis. CIRP knockdown by siRNA interference significantly reduced the AKT phosphorylation of C2C12 cells. Wortmannin inhibited the AKT phosphorylation of skeletal muscle after acute cold exposure, thereby inhibiting glucose metabolism and aggravating apoptosis. Taken together, acute cold exposure up-regulates CIRP in mouse skeletal muscle, which regulates glucose metabolism and maintains energy balance in skeletal muscle cells through the AKT signaling pathway, thus slowing down the apoptosis of skeletal muscle cells.
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Affiliation(s)
- Yang Liu
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Peng Liu
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Yajie Hu
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Yu Cao
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Jingjing Lu
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Yuying Yang
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Hongming Lv
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Shuai Lian
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Bin Xu
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Shize Li
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
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56
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Wang CH, Lundh M, Fu A, Kriszt R, Huang TL, Lynes MD, Leiria LO, Shamsi F, Darcy J, Greenwood BP, Narain NR, Tolstikov V, Smith KL, Emanuelli B, Chang YT, Hagen S, Danial NN, Kiebish MA, Tseng YH. CRISPR-engineered human brown-like adipocytes prevent diet-induced obesity and ameliorate metabolic syndrome in mice. Sci Transl Med 2021; 12:12/558/eaaz8664. [PMID: 32848096 DOI: 10.1126/scitranslmed.aaz8664] [Citation(s) in RCA: 72] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 02/24/2020] [Accepted: 08/03/2020] [Indexed: 12/15/2022]
Abstract
Brown and brown-like beige/brite adipocytes dissipate energy and have been proposed as therapeutic targets to combat metabolic disorders. However, the therapeutic effects of cell-based therapy in humans remain unclear. Here, we created human brown-like (HUMBLE) cells by engineering human white preadipocytes using CRISPR-Cas9-SAM-gRNA to activate endogenous uncoupling protein 1 expression. Obese mice that received HUMBLE cell transplants showed a sustained improvement in glucose tolerance and insulin sensitivity, as well as increased energy expenditure. Mechanistically, increased arginine/nitric oxide (NO) metabolism in HUMBLE adipocytes promoted the production of NO that was carried by S-nitrosothiols and nitrite in red blood cells to activate endogenous brown fat and improved glucose homeostasis in recipient animals. Together, these data demonstrate the utility of using CRISPR-Cas9 technology to engineer human white adipocytes to display brown fat-like phenotypes and may open up cell-based therapeutic opportunities to combat obesity and diabetes.
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Affiliation(s)
- Chih-Hao Wang
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA.,Graduate Institute of Biomedical Sciences, China Medical University, Taichung 40402, Taiwan
| | - Morten Lundh
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA.,Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, DK-2200, Denmark.,Gubra Aps, Hørsholm, DK-2970, Denmark
| | - Accalia Fu
- Department of Cancer Biology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215, USA.,Department of Cell Biology, Harvard Medical School, Boston, MA 02215, USA
| | - Rókus Kriszt
- Department of Biomedical Engineering, National University of Singapore, Singapore, 117583.,Graduate School for Integrative Sciences and Engineering (NGS), National University of Singapore, Singapore 119077, Singapore
| | - Tian Lian Huang
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA
| | - Matthew D Lynes
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA
| | - Luiz O Leiria
- Department of Pharmacology, Ribeirao Preto Medical School, University of São Paulo, Ribeirão Preto, 14049-900, Brazil.,Center of Research of Inflammatory Diseases, Ribeirao Preto Medical School, University of São Paulo, Ribeirão Preto, 14049-900, Brazil
| | - Farnaz Shamsi
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA
| | - Justin Darcy
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA
| | | | | | | | - Kyle L Smith
- Department of Surgery, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
| | - Brice Emanuelli
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, DK-2200, Denmark
| | - Young-Tae Chang
- Center for Self-assembly and Complexity, Institute for Basic Science (IBS), Pohang 34126, Republic of Korea.,Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Susan Hagen
- Department of Surgery, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
| | - Nika N Danial
- Department of Cancer Biology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215, USA
| | | | - Yu-Hua Tseng
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA. .,Harvard Stem Cell Institute, Harvard University, Cambridge, MA 02138, USA
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57
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Laurila S, Sun L, Lahesmaa M, Schnabl K, Laitinen K, Klén R, Li Y, Balaz M, Wolfrum C, Steiger K, Niemi T, Taittonen M, U-Din M, Välikangas T, Elo LL, Eskola O, Kirjavainen AK, Nummenmaa L, Virtanen KA, Klingenspor M, Nuutila P. Secretin activates brown fat and induces satiation. Nat Metab 2021; 3:798-809. [PMID: 34158656 DOI: 10.1038/s42255-021-00409-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 05/07/2021] [Indexed: 02/06/2023]
Abstract
Brown adipose tissue (BAT) thermogenesis is activated by feeding. Recently, we revealed a secretin-mediated gut-BAT-brain axis, which stimulates satiation in mice, but the purpose of meal-induced BAT activation in humans has been unclear. In this placebo-controlled, randomized crossover study, we investigated the effects of intravenous secretin on BAT metabolism (measured with [18F]FDG and [15O]H2O positron emission tomography) and appetite (measured with functional magnetic resonance imaging) in healthy, normal weight men (GUTBAT trial no. NCT03290846). Participants were blinded to the intervention. Secretin increased BAT glucose uptake (primary endpoint) compared to placebo by 57% (median (interquartile range, IQR), 0.82 (0.77) versus 0.59 (0.53) μmol per 100 g per min, 95% confidence interval (CI) (0.09, 0.89), P = 0.002, effect size r = 0.570), while BAT perfusion remained unchanged (mean (s.d.) 4.73 (1.82) versus 6.14 (3.05) ml per 100 g per min, 95%CI (-2.91, 0.07), P = 0.063, effect size d = -0.549) (n = 15). Whole body energy expenditure increased by 2% (P = 0.011) (n = 15). Secretin attenuated blood-oxygen level-dependent activity (primary endpoint) in brain reward circuits during food cue tasks (significance level false discovery rate corrected at P = 0.05) (n = 14). Caloric intake did not significantly change, but motivation to refeed after a meal was delayed by 39 min (P = 0.039) (n = 14). No adverse effects were detected. Here we show in humans that secretin activates BAT, reduces central responses to appetizing food and delays the motivation to refeed after a meal. This suggests that meal-induced, secretin-mediated BAT activation is relevant in the control of food intake in humans. As obesity is increasing worldwide, this appetite regulating axis offers new possibilities for clinical research in treating obesity.
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Affiliation(s)
- Sanna Laurila
- Turku PET Centre, University of Turku, Turku, Finland
- Heart Center, Turku University Hospital, Turku, Finland
- Satakunta Central Hospital, Pori, Finland
| | - Lihua Sun
- Turku PET Centre, University of Turku, Turku, Finland
| | - Minna Lahesmaa
- Turku PET Centre, University of Turku, Turku, Finland
- Department of Internal Medicine, Jorvi Hospital, Helsinki University Hospital, Helsinki, Finland
| | - Katharina Schnabl
- Chair for Molecular Nutritional Medicine, Technical University of Munich, TUM School of Life Sciences, Freising, Germany
- EKFZ - Else Kröner Fresenius Center for Nutritional Medicine, Technical University of Munich, Freising, Germany
- ZIEL - Institute for Food & Health, Technical University of Munich, Freising, Germany
| | - Kirsi Laitinen
- Institute of Biomedicine, University of Turku, Turku, Finland
| | - Riku Klén
- Turku PET Centre, University of Turku, Turku, Finland
| | - Yongguo Li
- Chair for Molecular Nutritional Medicine, Technical University of Munich, TUM School of Life Sciences, Freising, Germany
- EKFZ - Else Kröner Fresenius Center for Nutritional Medicine, Technical University of Munich, Freising, Germany
- ZIEL - Institute for Food & Health, Technical University of Munich, Freising, Germany
| | - Miroslav Balaz
- Institute of Food, Nutrition and Health, ETH Zürich, Schwerzenbach, Switzerland
| | - Christian Wolfrum
- Institute of Food, Nutrition and Health, ETH Zürich, Schwerzenbach, Switzerland
| | - Katja Steiger
- Institue of Pathology, School of Medicine, Technical University of Munich, Munich, Germany
| | - 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
- Turku PET Centre, Turku University Hospital, Turku, Finland
| | | | - Laura L Elo
- Institute of Biomedicine, University of Turku, Turku, Finland
- Turku Bioscience Centre, University of Turku, Turku, Finland
- Turku Bioscience Centre, Åbo Akademi University, Turku, Finland
| | - Olli Eskola
- Turku PET Centre, University of Turku, Turku, Finland
| | | | - Lauri Nummenmaa
- Turku PET Centre, University of Turku, Turku, Finland
- Department of Psychology, University of Turku, Turku, Finland
| | - 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
- Department of Endocrinology and Clinical Nutrition, Kuopio University Hospital, Kuopio, Finland
| | - Martin Klingenspor
- Chair for Molecular Nutritional Medicine, Technical University of Munich, TUM School of Life Sciences, Freising, Germany
- EKFZ - Else Kröner Fresenius Center for Nutritional Medicine, Technical University of Munich, Freising, Germany
- ZIEL - Institute for Food & Health, Technical University of Munich, Freising, Germany
| | - Pirjo Nuutila
- Turku PET Centre, University of Turku, Turku, Finland.
- Turku PET Centre, Turku University Hospital, Turku, Finland.
- Department of Endocrinology, Turku University Hospital, Turku, Finland.
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58
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Yurkevicius BR, Alba BK, Seeley AD, Castellani JW. Human cold habituation: Physiology, timeline, and modifiers. Temperature (Austin) 2021; 9:122-157. [PMID: 36106151 PMCID: PMC9467574 DOI: 10.1080/23328940.2021.1903145] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Habituation is an adaptation seen in many organisms, defined by a reduction in the response to repeated stimuli. Evolutionarily, habituation is thought to benefit the organism by allowing conservation of metabolic resources otherwise spent on sub-lethal provocations including repeated cold exposure. Hypermetabolic and/or insulative adaptations may occur after prolonged and severe cold exposures, resulting in enhanced cold defense mechanisms such as increased thermogenesis and peripheral vasoconstriction, respectively. Habituation occurs prior to these adaptations in response to short duration mild cold exposures, and, perhaps counterintuitively, elicits a reduction in cold defense mechanisms demonstrated through higher skin temperatures, attenuated shivering, and reduced cold sensations. These habituated responses likely serve to preserve peripheral tissue temperature and conserve energy during non-life threatening cold stress. The purpose of this review is to define habituation in general terms, present evidence for the response in non-human species, and provide an up-to-date, critical examination of past studies and the potential physiological mechanisms underlying human cold habituation. Our aim is to stimulate interest in this area of study and promote further experiments to understand this physiological adaptation.
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Affiliation(s)
- Beau R. Yurkevicius
- Thermal and Mountain Medicine Division, US Army Research Institute of Environmental Medicine, Natick, MA, USA
| | - Billie K. Alba
- Thermal and Mountain Medicine Division, US Army Research Institute of Environmental Medicine, Natick, MA, USA
| | - Afton D. Seeley
- Thermal and Mountain Medicine Division, US Army Research Institute of Environmental Medicine, Natick, MA, USA
- Oak Ridge Institute of Science and Education, Belcamp, MD, USA
| | - John W. Castellani
- Thermal and Mountain Medicine Division, US Army Research Institute of Environmental Medicine, Natick, MA, USA
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59
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Wang Z, Wang QA, Liu Y, Jiang L. Energy metabolism in brown adipose tissue. FEBS J 2021; 288:3647-3662. [PMID: 34028971 DOI: 10.1111/febs.16015] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 05/06/2021] [Accepted: 05/12/2021] [Indexed: 12/14/2022]
Abstract
Brown adipose tissue (BAT) is well known to burn calories through uncoupled respiration, producing heat to maintain body temperature. This 'calorie wasting' feature makes BAT a special tissue, which can function as an 'energy sink' in mammals. While a combination of high energy intake and low energy expenditure is the leading cause of overweight and obesity in modern society, activating a safe 'energy sink' has been proposed as a promising obesity treatment strategy. Metabolically, lipids and glucose have been viewed as the major energy substrates in BAT, while succinate, lactate, branched-chain amino acids, and other metabolites can also serve as energy substrates for thermogenesis. Since the cataplerotic and anaplerotic reactions of these metabolites interconnect with each other, BAT relies on its dynamic, flexible, and complex metabolism to support its special function. In this review, we summarize how BAT orchestrates the metabolic utilization of various nutrients to support thermogenesis and contributes to whole-body metabolic homeostasis.
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Affiliation(s)
- Zhichao Wang
- Department of Molecular & Cellular Endocrinology, Arthur Riggs Diabetes and Metabolism Research Institute, Duarte, CA, USA
| | - Qiong A Wang
- Department of Molecular & Cellular Endocrinology, Arthur Riggs Diabetes and Metabolism Research Institute, Duarte, CA, USA.,Comprehensive Cancer Center, Beckman Research Institute, City of Hope Medical Center, Duarte, CA, USA
| | - Yong Liu
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Frontier Science Center for Immunology and Metabolism, Institute for Advanced Studies, Wuhan University, China
| | - Lei Jiang
- Department of Molecular & Cellular Endocrinology, Arthur Riggs Diabetes and Metabolism Research Institute, Duarte, CA, USA.,Comprehensive Cancer Center, Beckman Research Institute, City of Hope Medical Center, Duarte, CA, USA
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60
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Roth CL, Molica F, Kwak BR. Browning of White Adipose Tissue as a Therapeutic Tool in the Fight against Atherosclerosis. Metabolites 2021; 11:319. [PMID: 34069148 PMCID: PMC8156962 DOI: 10.3390/metabo11050319] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/05/2021] [Accepted: 05/13/2021] [Indexed: 02/07/2023] Open
Abstract
Despite continuous medical advances, atherosclerosis remains the prime cause of mortality worldwide. Emerging findings on brown and beige adipocytes highlighted that these fat cells share the specific ability of non-shivering thermogenesis due to the expression of uncoupling protein 1. Brown fat is established during embryogenesis, and beige cells emerge from white adipose tissue exposed to specific stimuli like cold exposure into a process called browning. The consecutive energy expenditure of both thermogenic adipose tissues has shown therapeutic potential in metabolic disorders like obesity and diabetes. The latest data suggest promising effects on atherosclerosis development as well. Upon cold exposure, mice and humans have a physiological increase in brown adipose tissue activation and browning of white adipocytes is promoted. The use of drugs like β3-adrenergic agonists in murine models induces similar effects. With respect to atheroprotection, thermogenic adipose tissue activation has beneficial outcomes in mice by decreasing plasma triglycerides, total cholesterol and low-density lipoproteins, by increasing high-density lipoproteins, and by inducing secretion of atheroprotective adipokines. Atheroprotective effects involve an unaffected hepatic clearance. Latest clinical data tend to find thinner atherosclerotic lesions in patients with higher brown adipose tissue activity. Strategies for preserving healthy arteries are a major concern for public health.
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Affiliation(s)
| | - Filippo Molica
- Department of Pathology and Immunology, University of Geneva, CH-1211 Geneva, Switzerland; (C.L.R.); (B.R.K.)
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61
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McNeill BT, Suchacki KJ, Stimson RH. MECHANISMS IN ENDOCRINOLOGY: Human brown adipose tissue as a therapeutic target: warming up or cooling down? Eur J Endocrinol 2021; 184:R243-R259. [PMID: 33729178 PMCID: PMC8111330 DOI: 10.1530/eje-20-1439] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 03/10/2021] [Indexed: 12/12/2022]
Abstract
Excessive accumulation of white adipose tissue leads to obesity and its associated metabolic health consequences such as type 2 diabetes and cardiovascular disease. Several approaches to treat or prevent obesity including public health interventions, surgical weight loss, and pharmacological approaches to reduce caloric intake have failed to substantially modify the increasing prevalence of obesity. The (re-)discovery of active brown adipose tissue (BAT) in adult humans approximately 15 years ago led to a resurgence in research into whether BAT activation could be a novel therapy for the treatment of obesity. Upon cold stimulus, BAT activates and generates heat to maintain body temperature, thus increasing energy expenditure. Activation of BAT may provide a unique opportunity to increase energy expenditure without the need for exercise. However, much of the underlying mechanisms surrounding BAT activation are still being elucidated and the effectiveness of BAT as a therapeutic target has not been realised. Research is ongoing to determine how best to expand BAT mass and activate existing BAT; approaches include cold exposure, pharmacological stimulation using sympathomimetics, browning agents that induce formation of thermogenic beige adipocytes in white adipose depots, and the identification of factors secreted by BAT with therapeutic potential. In this review, we discuss the caloric capacity and other metabolic benefits from BAT activation in humans and the role of metabolic tissues such as skeletal muscle in increasing energy expenditure. We discuss the potential of current approaches and the challenges of BAT activation as a novel strategy to treat obesity and metabolic disorders.
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Affiliation(s)
- Ben T McNeill
- University/BHF Centre for Cardiovascular Science, University of Edinburgh, Queen’s Medical Research Institute, Edinburgh, UK
| | - Karla J Suchacki
- University/BHF Centre for Cardiovascular Science, University of Edinburgh, Queen’s Medical Research Institute, Edinburgh, UK
| | - Roland H Stimson
- University/BHF Centre for Cardiovascular Science, University of Edinburgh, Queen’s Medical Research Institute, Edinburgh, UK
- Correspondence should be addressed to R H Stimson Email
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62
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Lyons SA, Tate KB, Welch KC, McClelland GB. Lipid oxidation during thermogenesis in high-altitude deer mice ( Peromyscus maniculatus). Am J Physiol Regul Integr Comp Physiol 2021; 320:R735-R746. [PMID: 33729020 DOI: 10.1152/ajpregu.00266.2020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
When at their maximum thermogenic capacity (cold-induced V̇o2max), small endotherms reach levels of aerobic metabolism as high, or even higher, than running V̇o2max. How these high rates of thermogenesis are supported by substrate oxidation is currently unclear. The appropriate utilization of metabolic fuels that could sustain thermogenesis over extended periods may be important for survival in cold environments, like high altitude. Previous studies show that high capacities for lipid use in high-altitude deer mice may have evolved in concert with greater thermogenic capacities. The purpose of this study was to determine how lipid utilization at both moderate and maximal thermogenic intensities may differ in high- and low-altitude deer mice, and strictly low-altitude white-footed mice. We also examined the phenotypic plasticity of lipid use after acclimation to cold hypoxia (CH), conditions simulating high altitude. We found that lipids were the primary fuel supporting both moderate and maximal rates of thermogenesis in both species of mice. Lipid oxidation increased threefold in mice from 30°C to 0°C, consistent with increases in oxidation of [13C]palmitic acid. CH acclimation led to an increase in [13C]palmitic acid oxidation at 30°C but did not affect total lipid oxidation. Lipid oxidation rates at cold-induced V̇o2max were two- to fourfold those at 0°C and increased further after CH acclimation, especially in high-altitude deer mice. These are the highest mass-specific lipid oxidation rates observed in any land mammal. Uncovering the mechanisms that allow for these high rates of oxidation will aid our understanding of the regulation of lipid metabolism.
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Affiliation(s)
- Sulayman A Lyons
- Department of Biology, McMaster University, Hamilton, Ontario, Canada
| | - Kevin B Tate
- Department of Biology, McMaster University, Hamilton, Ontario, Canada
| | - Kenneth C Welch
- Department of Biological Sciences, University of Toronto Scarborough, Toronto, Ontario, Canada
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63
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Levy SB, Klimova TM, Zakharova RN, Fedorov AI, Fedorova VI, Baltakhinova ME, Leonard WR. Evidence for a sensitive period of plasticity in brown adipose tissue during early childhood among indigenous Siberians. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2021; 175:834-846. [PMID: 33913150 DOI: 10.1002/ajpa.24297] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 04/06/2021] [Accepted: 04/17/2021] [Indexed: 12/19/2022]
Abstract
OBJECTIVES Evolutionary theorists have debated the adaptive significance of developmental plasticity in organisms with long lifespans such as humans. This debate in part stems from uncertainty regarding the timing of sensitive periods. Does sensitivity to environmental signals fluctuate across development or does it steadily decline? We investigated developmental plasticity in brown adipose tissue (BAT) among indigenous Siberians in order to explore the timing of phenotypic sensitivity to cold stress. METHODS BAT thermogenesis was quantified using infrared thermal imaging in 78 adults (25 men; 33 women). Cold exposure during gestation, infancy, early childhood, middle childhood, and adolescence was quantified using: (1) the average ambient temperature across each period; (2) the number of times daily temperature dropped below -40°F during each period. We also assessed past cold exposure with a retrospective survey of participation in outdoor activities. RESULTS Adult BAT thermogenesis was significantly associated with the average temperature (p = 0.021), the number of times it was below -40°F (p = 0.026), and participation in winter outdoor activities (p = 0.037) during early childhood. CONCLUSIONS Our results suggest that early childhood represents an important stage for developmental plasticity, and that culture may play a critical role in shaping the timing of environmental signals. The findings highlight a new pathway through which the local consequences of global climate change may influence human biology, and they suggest that ambient temperature may represent an understudied component of the developmental origins of health and disease.
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Affiliation(s)
- Stephanie B Levy
- Department of Anthropology, CUNY Hunter College, New York, New York, USA
- New York Consortium in Evolution Primatology, New York, New York, USA
| | - Tatiana M Klimova
- North-Eastern Federal University Named M. K. Ammosov, Yakutsk, Russia
- Yakutsk Scientific Center for Complex Medical Problems, Yakutsk, Russia
| | - Raisa N Zakharova
- North-Eastern Federal University Named M. K. Ammosov, Yakutsk, Russia
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64
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Kwiecien SY, McHugh MP. The cold truth: the role of cryotherapy in the treatment of injury and recovery from exercise. Eur J Appl Physiol 2021; 121:2125-2142. [PMID: 33877402 DOI: 10.1007/s00421-021-04683-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 04/05/2021] [Indexed: 01/08/2023]
Abstract
Cryotherapy is utilized as a physical intervention in the treatment of injury and exercise recovery. Traditionally, ice is used in the treatment of musculoskeletal injury while cold water immersion or whole-body cryotherapy is used for recovery from exercise. In humans, the primary benefit of traditional cryotherapy is reduced pain following injury or soreness following exercise. Cryotherapy-induced reductions in metabolism, inflammation, and tissue damage have been demonstrated in animal models of muscle injury; however, comparable evidence in humans is lacking. This absence is likely due to the inadequate duration of application of traditional cryotherapy modalities. Traditional cryotherapy application must be repeated to overcome this limitation. Recently, the novel application of cooling with 15 °C phase change material (PCM), has been administered for 3-6 h with success following exercise. Although evidence suggests that chronic use of cryotherapy during resistance training blunts the anabolic training effect, recovery using PCM does not compromise acute adaptation. Therefore, following exercise, cryotherapy is indicated when rapid recovery is required between exercise bouts, as opposed to after routine training. Ultimately, the effectiveness of cryotherapy as a recovery modality is dependent upon its ability to maintain a reduction in muscle temperature and on the timing of treatment with respect to when the injury occurred, or the exercise ceased. Therefore, to limit the proliferation of secondary tissue damage that occurs in the hours after an injury or a strenuous exercise bout, it is imperative that cryotherapy be applied in abundance within the first few hours of structural damage.
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Affiliation(s)
- Susan Y Kwiecien
- Nicholas Institute of Sports Medicine and Athletic Trauma, Lenox Hill Hospital, New York, NY, USA.
| | - Malachy P McHugh
- Nicholas Institute of Sports Medicine and Athletic Trauma, Lenox Hill Hospital, New York, NY, USA
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65
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Eimonte M, Eimantas N, Daniuseviciute L, Paulauskas H, Vitkauskiene A, Dauksaite G, Brazaitis M. Recovering body temperature from acute cold stress is associated with delayed proinflammatory cytokine production in vivo. Cytokine 2021; 143:155510. [PMID: 33820701 DOI: 10.1016/j.cyto.2021.155510] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 03/05/2021] [Accepted: 03/19/2021] [Indexed: 12/13/2022]
Abstract
A poor outcome of whole-body hypothermia often results from a late complication, rather than from acute effects of hypothermia. A low body (cell) temperature or the increase in the concentrations of the stress hormones cortisol, epinephrine, and norepinephrine in response to acute cold stress have been proposed as potent proinflammatory cytokine suppressant. In the current study, we tested the hypothesis that the recovery of body temperature from a whole-body intermittent cold-water immersion (CWI, at 13-14 °C for a total 170 min) is associated with a delayed response of proinflammatory cytokines in young healthy men. Our results revealed a delay in the increase in the proinflammatory interleukin 6 and interleukin 1β cytokines after the CWI, which paralleled the changes in cortisol, epinephrine, norepinephrine, and body temperature. CWI decreased tumor necrosis factor α (TNF-α) immediately and 1 h after the CWI. Although TNF-α had recovered to the pre-immersion level at 2 h after CWI, its natural circadian cycle kinetics was disrupted until 12 h after the CWI. Furthermore, we showed that CWI strongly modified the white blood cell counts, with changes reaching a peak between 1 and 2 h after the CWI.
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Affiliation(s)
- Milda Eimonte
- Institute of Sport Science and Innovations, Lithuanian Sports University, Kaunas, Lithuania
| | - Nerijus Eimantas
- Institute of Sport Science and Innovations, Lithuanian Sports University, Kaunas, Lithuania
| | - Laura Daniuseviciute
- Faculty of Social Sciences, Arts and Humanities, Kaunas University of Technology, Kaunas, Lithuania
| | - Henrikas Paulauskas
- Institute of Sport Science and Innovations, Lithuanian Sports University, Kaunas, Lithuania
| | - Astra Vitkauskiene
- Department of Laboratory Medicine, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Gintare Dauksaite
- Institute of Sport Science and Innovations, Lithuanian Sports University, Kaunas, Lithuania
| | - Marius Brazaitis
- Institute of Sport Science and Innovations, Lithuanian Sports University, Kaunas, Lithuania.
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66
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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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67
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Elgaabari A, Miyawaki-Kuwakado A, Tomimatsu K, Wu Q, Tokunaga K, Izumi W, Suzuki T, Tatsumi R, Nakamura M. Epigenetic effects induced by the ectopic expression of Pax7 in 3T3-L1. J Biochem 2021; 170:107-117. [PMID: 33729538 DOI: 10.1093/jb/mvab030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 03/07/2021] [Indexed: 11/14/2022] Open
Abstract
Although skeletal muscle cells and adipocytes are derived from the same mesoderm, they do not transdifferentiate in vivo and are strictly distinct at the level of gene expression. To elucidate some of the regulatory mechanisms underlying this strict distinction, Pax7, a myogenic factor, was ectopically expressed in 3T3-L1 adipose progenitor cells to perturb their adipocyte differentiation potential. Transcriptome analysis showed that ectopic expression of Pax7 repressed the expression of some adipocyte genes and induced expression of some skeletal muscle cell genes. We next profiled the epigenomic state altered by Pax7 expression using H3K27ac, an activating histone mark, and H3K27me3, a repressive histone mark, as indicators. Our results show that ectopic expression of Pax7 did not result in the formation of H3K27ac at loci of skeletal muscle-related genes, but instead resulted in the formation of H3K27me3 at adipocyte-related gene loci. These findings suggest that the primary function of ectopic Pax7 expression is the formation of H3K27me3, and muscle gene expression results from secondary regulation.
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Affiliation(s)
- Alaa Elgaabari
- Alaa Elgaabari, Atsuko Miyawaki-Kuwakado, Kosuke Tomimatsu, Qianmei Wu, Kosuke Tokunaga, Wakana Izumi, Takahiro Suzuki, Ryuichi Tatsumi, Mako Nakamura.,Division of Transcriptomics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, 812-8582, Japan
| | - Atsuko Miyawaki-Kuwakado
- Department of Bioresource Sciences, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Fukuoka, 819-0395, Japan
| | - Kosuke Tomimatsu
- Department of Bioresource Sciences, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Fukuoka, 819-0395, Japan
| | - Qianmei Wu
- Department of Bioresource Sciences, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Fukuoka, 819-0395, Japan
| | - Kosuke Tokunaga
- Alaa Elgaabari, Atsuko Miyawaki-Kuwakado, Kosuke Tomimatsu, Qianmei Wu, Kosuke Tokunaga, Wakana Izumi, Takahiro Suzuki, Ryuichi Tatsumi, Mako Nakamura
| | - Wakana Izumi
- Alaa Elgaabari, Atsuko Miyawaki-Kuwakado, Kosuke Tomimatsu, Qianmei Wu, Kosuke Tokunaga, Wakana Izumi, Takahiro Suzuki, Ryuichi Tatsumi, Mako Nakamura
| | - Takahiro Suzuki
- Alaa Elgaabari, Atsuko Miyawaki-Kuwakado, Kosuke Tomimatsu, Qianmei Wu, Kosuke Tokunaga, Wakana Izumi, Takahiro Suzuki, Ryuichi Tatsumi, Mako Nakamura
| | - Ryuichi Tatsumi
- Alaa Elgaabari, Atsuko Miyawaki-Kuwakado, Kosuke Tomimatsu, Qianmei Wu, Kosuke Tokunaga, Wakana Izumi, Takahiro Suzuki, Ryuichi Tatsumi, Mako Nakamura
| | - Mako Nakamura
- Alaa Elgaabari, Atsuko Miyawaki-Kuwakado, Kosuke Tomimatsu, Qianmei Wu, Kosuke Tokunaga, Wakana Izumi, Takahiro Suzuki, Ryuichi Tatsumi, Mako Nakamura
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68
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Zhao D, Pan Y, Yu N, Bai Y, Ma R, Mo F, Zuo J, Chen B, Jia Q, Zhang D, Liu J, Jiang G, Gao S. Curcumin improves adipocytes browning and mitochondrial function in 3T3-L1 cells and obese rodent model. ROYAL SOCIETY OPEN SCIENCE 2021; 8:200974. [PMID: 33959308 PMCID: PMC8074937 DOI: 10.1098/rsos.200974] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 02/19/2021] [Indexed: 06/12/2023]
Abstract
Accumulating evidence suggests that mitochondrial dysfunction and adipocyte differentiation promote lipid accumulation in the development of obesity and diabetes. Curcumin is an active ingredient extracted from Curcuma longa that has been shown to exhibit antioxidant and anti-inflammatory potency in metabolic disorders. However, the underlying mechanisms of curcumin in adipocytes remain largely unexplored. We studied the effects of curcumin on adipogenic differentiation and mitochondrial oxygen consumption and analysed the possible mechanisms. 3T3-L1 preadipocytes were used to assess the effect of curcumin on differentiation of adipocytes. The Mito Stress Test measured by Seahorse XF Analyzer was applied to investigate the effect of curcumin on mitochondrial oxygen consumption in 3T3-L1 adipocytes. The effect of curcumin on the morphology of both white and brown adipose tissue (WAT and BAT) was evaluated in a high-fat diet-induced obese mice model. We found that curcumin dose-dependently (10, 20 and 35 µM) induced adipogenic differentiation and the intracellular fat droplet accumulation. Additionally, 10 µM curcumin remarkably enhanced mature adipocyte mitochondrial respiratory function, specifically, accelerating basic mitochondrial respiration, ATP production and uncoupling capacity via the regulation of peroxisome proliferator-activated receptor γ (PPARγ) (p < 0.01). Curcumin administration also attenuated the morphological changes in adipose tissues in high-fat diet-induced obese mice. Moreover, curcumin markedly increased the mRNA and protein expressions of mitochondrial uncoupling protein 1 (UCP1), PPARγ, peroxisome proliferator-activated receptor-γ coactivator-1α (PGC-1α) and PR domain protein 16 (PRDM16) in vivo and in vitro. Collectively, the results demonstrate that curcumin promotes the adipogenic differentiation of preadipocytes and mitochondrial oxygen consumption in 3T3-L1 mature adipocytes by regulating UCP1, PRDM16, PPARγ and PGC-1α expression.
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Affiliation(s)
- Dandan Zhao
- Traditional Chinese Medicine School, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Yanyun Pan
- Traditional Chinese Medicine School, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Na Yu
- Educational Office, Beijing Tian Tan Hospital, Capital Medical University, Beijing 100050, People's Republic of China
| | - Ying Bai
- Traditional Chinese Medicine School, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Rufeng Ma
- Traditional Chinese Medicine School, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Fangfang Mo
- Traditional Chinese Medicine School, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Jiacheng Zuo
- Traditional Chinese Medicine School, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Beibei Chen
- Traditional Chinese Medicine School, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Qiangqiang Jia
- Traditional Chinese Medicine School, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Dongwei Zhang
- Traditional Chinese Medicine School, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Jiaxian Liu
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA 90007, USA
| | - Guanjian Jiang
- Traditional Chinese Medicine School, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Sihua Gao
- Traditional Chinese Medicine School, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
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69
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Loss of α-actinin-3 during human evolution provides superior cold resilience and muscle heat generation. Am J Hum Genet 2021; 108:446-457. [PMID: 33600773 PMCID: PMC8008486 DOI: 10.1016/j.ajhg.2021.01.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 01/19/2021] [Indexed: 12/12/2022] Open
Abstract
The protein α-actinin-3 expressed in fast-twitch skeletal muscle fiber is absent in 1.5 billion people worldwide due to homozygosity for a nonsense polymorphism in ACTN3 (R577X). The prevalence of the 577X allele increased as modern humans moved to colder climates, suggesting a link between α-actinin-3 deficiency and improved cold tolerance. Here, we show that humans lacking α-actinin-3 (XX) are superior in maintaining core body temperature during cold-water immersion due to changes in skeletal muscle thermogenesis. Muscles of XX individuals displayed a shift toward more slow-twitch isoforms of myosin heavy chain (MyHC) and sarcoplasmic reticulum (SR) proteins, accompanied by altered neuronal muscle activation resulting in increased tone rather than overt shivering. Experiments on Actn3 knockout mice showed no alterations in brown adipose tissue (BAT) properties that could explain the improved cold tolerance in XX individuals. Thus, this study provides a mechanism for the positive selection of the ACTN3 X-allele in cold climates and supports a key thermogenic role of skeletal muscle during cold exposure in humans.
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70
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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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71
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Sellers AJ, Pallubinsky H, Rense P, Bijnens W, van de Weijer T, Moonen-Kornips E, Schrauwen P, van Marken Lichtenbelt WD. The effect of cold exposure with shivering on glucose tolerance in healthy men. J Appl Physiol (1985) 2021; 130:193-205. [DOI: 10.1152/japplphysiol.00642.2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
This is the first study to examine the effect of cold-induced shivering on subsequent glucose tolerance determined under thermoneutral conditions. Plasma glucose and insulin concentrations increased during the oral glucose tolerance test post shivering. Additionally, insulin sensitivity indices suggest insulin resistance following cold exposure. These results provide evidence for an acute post-shivering response, whereby glucose metabolism has deteriorated, contrary to the results from earlier studies on cold acclimation.
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Affiliation(s)
- Adam Jake Sellers
- Department of Nutrition and Movement Sciences, School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
| | - Hannah Pallubinsky
- Department of Nutrition and Movement Sciences, School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
| | - Pascal Rense
- Department of Nutrition and Movement Sciences, School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
| | - Wouter Bijnens
- Department of Nutrition and Movement Sciences, School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
| | - Tineke van de Weijer
- Department of Nutrition and Movement Sciences, School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
| | - Esther Moonen-Kornips
- Department of Nutrition and Movement Sciences, School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
| | - Patrick Schrauwen
- Department of Nutrition and Movement Sciences, School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
| | - Wouter D. van Marken Lichtenbelt
- Department of Nutrition and Movement Sciences, School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
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72
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Jia XW, Fang DL, Shi XY, Lu T, Yang C, Gao Y. Inducible beige adipocytes improve impaired glucose metabolism in interscapular BAT-removal mice. Biochim Biophys Acta Mol Cell Biol Lipids 2020; 1866:158871. [PMID: 33346159 DOI: 10.1016/j.bbalip.2020.158871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 11/08/2020] [Accepted: 12/14/2020] [Indexed: 11/20/2022]
Abstract
Inducible beige adipocytes are emerging as an interesting issue in obesity and metabolism research. There is a neglected possibility that brown adipocytes are equally activated when external stimuli induce the formation of beige adipocytes. Thus, the question is whether beige adipocytes have the same functions as brown adipocytes when brown adipose tissue (BAT) is lacking. This question has not been well studied. Therefore we determine the beneficial effects of beige adipocytes upon cold challenge or CL316243 treatments in animal models of interscapular BAT (iBAT) ablation by surgical denervation. We found that denervated iBAT were activated by cold exposure and CL316243 treatments. The data show that beige adipocytes partly contribute to the improvement of impaired glucose metabolism resulting from denervated iBAT. Thus, we further used iBAT-removal animal models to abolish iBAT functions completely. We found that beige adipocytes upon cold exposure or CL316243 treatments improved impaired glucose metabolism and enhanced glucose uptake in iBAT-removal mice. The insulin signaling was activated in iBAT-removal mice upon cold exposure. Both the activation of insulin signaling and up-regulation of glucose transporter expression were observed in iBAT-removal mice with CL316243 treatments. The data show that inducible beige adipocytes may have different mechanisms to improve impaired glucose metabolism. Inducible beige adipocytes can also enhance energy expenditure and lipolytic activity of white adipose tissues when iBAT is lacking. We provide direct evidences for the beneficial effect of inducible beige adipocytes in glucose metabolism and energy expenditure in the absence of iBAT in vivo.
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Affiliation(s)
- Xiao-Wei Jia
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Department of Human Anatomy, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China
| | - Dong-Liang Fang
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Department of Human Anatomy, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China
| | - Xin-Yi Shi
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Department of Human Anatomy, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China
| | - Tao Lu
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Department of Human Anatomy, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China
| | - Chun Yang
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Department of Human Anatomy, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China; Department of Experimental Center for Basic Medical Teaching, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China.
| | - Yan Gao
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Department of Human Anatomy, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China.
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73
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Shi Z, Qin M, Huang L, Xu T, Chen Y, Hu Q, Peng S, Peng Z, Qu LN, Chen SG, Tuo QH, Liao DF, Wang XP, Wu RR, Yuan TF, Li YH, Liu XM. Human torpor: translating insights from nature into manned deep space expedition. Biol Rev Camb Philos Soc 2020; 96:642-672. [PMID: 33314677 DOI: 10.1111/brv.12671] [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: 08/05/2020] [Revised: 11/09/2020] [Accepted: 11/17/2020] [Indexed: 12/12/2022]
Abstract
During a long-duration manned spaceflight mission, such as flying to Mars and beyond, all crew members will spend a long period in an independent spacecraft with closed-loop bioregenerative life-support systems. Saving resources and reducing medical risks, particularly in mental heath, are key technology gaps hampering human expedition into deep space. In the 1960s, several scientists proposed that an induced state of suppressed metabolism in humans, which mimics 'hibernation', could be an ideal solution to cope with many issues during spaceflight. In recent years, with the introduction of specific methods, it is becoming more feasible to induce an artificial hibernation-like state (synthetic torpor) in non-hibernating species. Natural torpor is a fascinating, yet enigmatic, physiological process in which metabolic rate (MR), body core temperature (Tb ) and behavioural activity are reduced to save energy during harsh seasonal conditions. It employs a complex central neural network to orchestrate a homeostatic state of hypometabolism, hypothermia and hypoactivity in response to environmental challenges. The anatomical and functional connections within the central nervous system (CNS) lie at the heart of controlling synthetic torpor. Although progress has been made, the precise mechanisms underlying the active regulation of the torpor-arousal transition, and their profound influence on neural function and behaviour, which are critical concerns for safe and reversible human torpor, remain poorly understood. In this review, we place particular emphasis on elaborating the central nervous mechanism orchestrating the torpor-arousal transition in both non-flying hibernating mammals and non-hibernating species, and aim to provide translational insights into long-duration manned spaceflight. In addition, identifying difficulties and challenges ahead will underscore important concerns in engineering synthetic torpor in humans. We believe that synthetic torpor may not be the only option for manned long-duration spaceflight, but it is the most achievable solution in the foreseeable future. Translating the available knowledge from natural torpor research will not only benefit manned spaceflight, but also many clinical settings attempting to manipulate energy metabolism and neurobehavioural functions.
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Affiliation(s)
- Zhe Shi
- National Clinical Research Center for Mental Disorders, and Department of Psychaitry, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China.,Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China.,State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, 100094, China.,Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiaotong University School of Medicine, Shanghai, 200030, China
| | - Meng Qin
- College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Lu Huang
- Guangdong-Hongkong-Macau Institute of CNS Regeneration, Ministry of Education CNS Regeneration Collaborative Joint Laboratory, Jinan University, Guangzhou, 510632, China
| | - Tao Xu
- Department of Anesthesiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, China
| | - Ying Chen
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Qin Hu
- College of Life Sciences and Bio-Engineering, Beijing University of Technology, Beijing, 100024, China
| | - Sha Peng
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
| | - Zhuang Peng
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
| | - Li-Na Qu
- State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, 100094, China
| | - Shan-Guang Chen
- State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, 100094, China
| | - Qin-Hui Tuo
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
| | - Duan-Fang Liao
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
| | - Xiao-Ping Wang
- National Clinical Research Center for Mental Disorders, and Department of Psychaitry, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
| | - Ren-Rong Wu
- National Clinical Research Center for Mental Disorders, and Department of Psychaitry, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
| | - Ti-Fei Yuan
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiaotong University School of Medicine, Shanghai, 200030, China.,Co-innovation Center of Neuroregeneration, Nantong University, Nantong, 226000, China
| | - Ying-Hui Li
- State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, 100094, China
| | - Xin-Min Liu
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China.,State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, 100094, China.,Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
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74
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Anton SD, Cruz-Almeida Y, Singh A, Alpert J, Bensadon B, Cabrera M, Clark DJ, Ebner NC, Esser KA, Fillingim RB, Goicolea SM, Han SM, Kallas H, Johnson A, Leeuwenburgh C, Liu AC, Manini TM, Marsiske M, Moore F, Qiu P, Mankowski RT, Mardini M, McLaren C, Ranka S, Rashidi P, Saini S, Sibille KT, Someya S, Wohlgemuth S, Tucker C, Xiao R, Pahor M. Innovations in Geroscience to enhance mobility in older adults. Exp Gerontol 2020; 142:111123. [PMID: 33191210 PMCID: PMC7581361 DOI: 10.1016/j.exger.2020.111123] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 10/15/2020] [Accepted: 10/16/2020] [Indexed: 02/07/2023]
Abstract
Aging is the primary risk factor for functional decline; thus, understanding and preventing disability among older adults has emerged as an important public health challenge of the 21st century. The science of gerontology - or geroscience - has the practical purpose of "adding life to the years." The overall goal of geroscience is to increase healthspan, which refers to extending the portion of the lifespan in which the individual experiences enjoyment, satisfaction, and wellness. An important facet of this goal is preserving mobility, defined as the ability to move independently. Despite this clear purpose, this has proven to be a challenging endeavor as mobility and function in later life are influenced by a complex interaction of factors across multiple domains. Moreover, findings over the past decade have highlighted the complexity of walking and how targeting multiple systems, including the brain and sensory organs, as well as the environment in which a person lives, can have a dramatic effect on an older person's mobility and function. For these reasons, behavioral interventions that incorporate complex walking tasks and other activities of daily living appear to be especially helpful for improving mobility function. Other pharmaceutical interventions, such as oxytocin, and complementary and alternative interventions, such as massage therapy, may enhance physical function both through direct effects on biological mechanisms related to mobility, as well as indirectly through modulation of cognitive and socioemotional processes. Thus, the purpose of the present review is to describe evolving interventional approaches to enhance mobility and maintain healthspan in the growing population of older adults in the United States and countries throughout the world. Such interventions are likely to be greatly assisted by technological advances and the widespread adoption of virtual communications during and after the COVID-19 era.
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Affiliation(s)
- Stephen D Anton
- University of Florida, Department of Aging and Geriatric Research, 2004 Mowry Road, Gainesville, FL 32611, United States.
| | - Yenisel Cruz-Almeida
- University of Florida, Department of Community Dentistry and Behavioral Science, 1329 SW Archer Road, Gainesville, FL 32610, United States.
| | - Arashdeep Singh
- University of Florida, Department of Pharmacodynamics, College of Pharmacy, 1345 Center Drive, Gainesville, FL 32610, United States.
| | - Jordan Alpert
- University of Florida, College of Journalism and Communications, Gainesville, FL 32610, United States.
| | - Benjamin Bensadon
- University of Florida, Department of Aging and Geriatric Research, 2004 Mowry Road, Gainesville, FL 32611, United States.
| | - Melanie Cabrera
- University of Florida, Department of Aging and Geriatric Research, 2004 Mowry Road, Gainesville, FL 32611, United States.
| | - David J Clark
- University of Florida, Department of Aging and Geriatric Research, 2004 Mowry Road, Gainesville, FL 32611, United States.
| | - Natalie C Ebner
- University of Florida, Department of Psychology, 945 Center Drive, Gainesville, FL 32611, United States.
| | - Karyn A Esser
- University of Florida, Department of Physiology and Functional Genomics, 1345 Center Drive, Gainesville, FL, United States.
| | - Roger B Fillingim
- University of Florida, Department of Community Dentistry and Behavioral Science, 1329 SW Archer Road, Gainesville, FL 32610, United States.
| | - Soamy Montesino Goicolea
- University of Florida, Department of Community Dentistry and Behavioral Science, 1329 SW Archer Road, Gainesville, FL 32610, United States.
| | - Sung Min Han
- University of Florida, Department of Aging and Geriatric Research, 2004 Mowry Road, Gainesville, FL 32611, United States.
| | - Henrique Kallas
- University of Florida, Department of Aging and Geriatric Research, 2004 Mowry Road, Gainesville, FL 32611, United States.
| | - Alisa Johnson
- University of Florida, Department of Aging and Geriatric Research, 2004 Mowry Road, Gainesville, FL 32611, United States.
| | - Christiaan Leeuwenburgh
- University of Florida, Department of Aging and Geriatric Research, 2004 Mowry Road, Gainesville, FL 32611, United States.
| | - Andrew C Liu
- University of Florida, Department of Physiology and Functional Genomics, 1345 Center Drive, Gainesville, FL, United States.
| | - Todd M Manini
- University of Florida, Department of Aging and Geriatric Research, 2004 Mowry Road, Gainesville, FL 32611, United States.
| | - Michael Marsiske
- University of Florida, Department of Clinical & Health Psychology, 1225 Center Drive, Gainesville, FL 32610, United States.
| | - Frederick Moore
- University of Florida, Department of Surgery, Gainesville, FL 32610, United States.
| | - Peihua Qiu
- University of Florida, Department of Biostatistics, Gainesville, FL 32611, United States.
| | - Robert T Mankowski
- University of Florida, Department of Aging and Geriatric Research, 2004 Mowry Road, Gainesville, FL 32611, United States.
| | - Mamoun Mardini
- University of Florida, Department of Aging and Geriatric Research, 2004 Mowry Road, Gainesville, FL 32611, United States.
| | - Christian McLaren
- University of Florida, Department of Aging and Geriatric Research, 2004 Mowry Road, Gainesville, FL 32611, United States.
| | - Sanjay Ranka
- University of Florida, Department of Computer & Information Science & Engineering, Gainesville, FL 32611, United States.
| | - Parisa Rashidi
- University of Florida, Department of Biomedical Engineering. P.O. Box 116131. Gainesville, FL 32610, United States.
| | - Sunil Saini
- University of Florida, Department of Aging and Geriatric Research, 2004 Mowry Road, Gainesville, FL 32611, United States.
| | - Kimberly T Sibille
- University of Florida, Department of Aging and Geriatric Research, 2004 Mowry Road, Gainesville, FL 32611, United States.
| | - Shinichi Someya
- University of Florida, Department of Aging and Geriatric Research, 2004 Mowry Road, Gainesville, FL 32611, United States.
| | - Stephanie Wohlgemuth
- University of Florida, Department of Aging and Geriatric Research, 2004 Mowry Road, Gainesville, FL 32611, United States.
| | - Carolyn Tucker
- University of Florida, Department of Psychology, 945 Center Drive, Gainesville, FL 32611, United States.
| | - Rui Xiao
- University of Florida, Department of Aging and Geriatric Research, 2004 Mowry Road, Gainesville, FL 32611, United States.
| | - Marco Pahor
- University of Florida, Department of Aging and Geriatric Research, 2004 Mowry Road, Gainesville, FL 32611, United States.
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75
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Abstract
Since the discovery of functionally competent, energy-consuming brown adipose tissue (BAT) in adult humans, much effort has been devoted to exploring this tissue as a means for increasing energy expenditure to counteract obesity. However, despite promising effects on metabolic rate and insulin sensitivity, no convincing evidence for weight-loss effects of cold-activated human BAT exists to date. Indeed, increasing energy expenditure would naturally induce compensatory feedback mechanisms to defend body weight. Interestingly, BAT is regulated by multiple interactions with the hypothalamus from regions overlapping with centers for feeding behavior and metabolic control. Therefore, in the further exploration of BAT as a potential source of novel drug targets, we discuss the hypothalamic orchestration of BAT activity and the relatively unexplored BAT feedback mechanisms on neuronal regulation. With a holistic view on hypothalamic-BAT interactions, we aim to raise ideas and provide a new perspective on this circuit and highlight its clinical relevance.
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Affiliation(s)
- Jo B Henningsen
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark;
| | - Camilla Scheele
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark;
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76
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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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77
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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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78
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da Conceição EPS, Morrison SF, Cano G, Chiavetta P, Tupone D. Median preoptic area neurons are required for the cooling and febrile activations of brown adipose tissue thermogenesis in rat. Sci Rep 2020; 10:18072. [PMID: 33093475 PMCID: PMC7581749 DOI: 10.1038/s41598-020-74272-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 09/25/2020] [Indexed: 02/08/2023] Open
Abstract
Within the central neural circuitry for thermoregulation, the balance between excitatory and inhibitory inputs to the dorsomedial hypothalamus (DMH) determines the level of activation of brown adipose tissue (BAT) thermogenesis. We employed neuroanatomical and in vivo electrophysiological techniques to identify a source of excitation to thermogenesis-promoting neurons in the DMH that is required for cold defense and fever. Inhibition of median preoptic area (MnPO) neurons blocked the BAT thermogenic responses during both PGE2-induced fever and cold exposure. Disinhibition or direct activation of MnPO neurons induced a BAT thermogenic response in warm rats. Blockade of ionotropic glutamate receptors in the DMH, or brain transection rostral to DMH, blocked cold-evoked or NMDA in MnPO-evoked BAT thermogenesis. RNAscope technique identified a glutamatergic population of MnPO neurons that projects to the DMH and expresses c-Fos following cold exposure. These discoveries relative to the glutamatergic drive to BAT sympathoexcitatory neurons in DMH augment our understanding of the central thermoregulatory circuitry in non-torpid mammals. Our data will contribute to the development of novel therapeutic approaches to induce therapeutic hypothermia for treating drug-resistant fever, and for improving glucose and energy homeostasis.
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Affiliation(s)
- Ellen Paula Santos da Conceição
- Department of Neurological Surgery, Oregon Health and Science University, 3181 SW Sam Jackson Park Road, Portland, OR, 97239-3098, USA
| | - Shaun F Morrison
- Department of Neurological Surgery, Oregon Health and Science University, 3181 SW Sam Jackson Park Road, Portland, OR, 97239-3098, USA
| | - Georgina Cano
- Department of Neuroscience, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - Pierfrancesco Chiavetta
- Department of Neurological Surgery, Oregon Health and Science University, 3181 SW Sam Jackson Park Road, Portland, OR, 97239-3098, USA
| | - Domenico Tupone
- Department of Neurological Surgery, Oregon Health and Science University, 3181 SW Sam Jackson Park Road, Portland, OR, 97239-3098, USA. .,Department of Biomedical and Neuromotor Science, University of Bologna, 40126, Bologna, Italy.
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79
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Adipocyte lipolysis: from molecular mechanisms of regulation to disease and therapeutics. Biochem J 2020; 477:985-1008. [PMID: 32168372 DOI: 10.1042/bcj20190468] [Citation(s) in RCA: 114] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 02/19/2020] [Accepted: 02/26/2020] [Indexed: 12/20/2022]
Abstract
Fatty acids (FAs) are stored safely in the form of triacylglycerol (TAG) in lipid droplet (LD) organelles by professional storage cells called adipocytes. These lipids are mobilized during adipocyte lipolysis, the fundamental process of hydrolyzing TAG to FAs for internal or systemic energy use. Our understanding of adipocyte lipolysis has greatly increased over the past 50 years from a basic enzymatic process to a dynamic regulatory one, involving the assembly and disassembly of protein complexes on the surface of LDs. These dynamic interactions are regulated by hormonal signals such as catecholamines and insulin which have opposing effects on lipolysis. Upon stimulation, patatin-like phospholipase domain containing 2 (PNPLA2)/adipocyte triglyceride lipase (ATGL), the rate limiting enzyme for TAG hydrolysis, is activated by the interaction with its co-activator, alpha/beta hydrolase domain-containing protein 5 (ABHD5), which is normally bound to perilipin 1 (PLIN1). Recently identified negative regulators of lipolysis include G0/G1 switch gene 2 (G0S2) and PNPLA3 which interact with PNPLA2 and ABHD5, respectively. This review focuses on the dynamic protein-protein interactions involved in lipolysis and discusses some of the emerging concepts in the control of lipolysis that include allosteric regulation and protein turnover. Furthermore, recent research demonstrates that many of the proteins involved in adipocyte lipolysis are multifunctional enzymes and that lipolysis can mediate homeostatic metabolic signals at both the cellular and whole-body level to promote inter-organ communication. Finally, adipocyte lipolysis is involved in various diseases such as cancer, type 2 diabetes and fatty liver disease, and targeting adipocyte lipolysis is of therapeutic interest.
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Richard G, Noll C, Archambault M, Lebel R, Tremblay L, Ait-Mohand S, Guérin B, Blondin DP, Carpentier AC, Lepage M. Contribution of perfusion to the 11 C-acetate signal in brown adipose tissue assessed by DCE-MRI and 68 Ga-DOTA PET in a rat model. Magn Reson Med 2020; 85:1625-1642. [PMID: 33010059 DOI: 10.1002/mrm.28535] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 08/15/2020] [Accepted: 09/07/2020] [Indexed: 12/29/2022]
Abstract
PURPOSE Determine if dynamic contrast enhanced (DCE) -MRI and/or 68 gallium 1,4,7,10-tetraazacyclododecane N, N', N″, N‴-tretraacetic acid (68 Ga-DOTA) positron emission tomography (PET) can assess perfusion in rat brown adipose tissue (BAT). Evaluate changes in perfusion between cold-stimulated and heat-inhibited BAT. Determine if the 11 C-acetate pharmacokinetic model can be constrained with perfusion information to improve assessment of BAT oxidative metabolism. METHODS Rats were split into three groups. In group 1 (N = 6), DCE-MRI with gadobutrol was compared directly to 68 Ga-DOTA PET following exposure to 10 °C for 48 h. 11 C-Acetate PET was also performed to assess oxidation. In group 2 (N = 4), only 68 Ga-DOTA PET was acquired following exposure to 10 °C for 48 h. Finally, in group 3 (N = 10), perfusion was assessed with DCE-MRI in rats exposed to 10 °C or 30 °C for 48 h, and oxidation was measured with 11 C-acetate. Perfusion was quantified with a two-compartment pharmacokinetic model, while oxidation was assessed by a four-compartment model. RESULTS DCE-MRI and 68 Ga-DOTA PET provided similar perfusion measures, but a decrease in the perfusion signal was noted with longer imaging sessions. Exposure to 10 °C or 30 °C did not affect the perfusion measures, but the 11 C-acetate signal increased in BAT at 10 °C. Without prior information about blood volume, the 11 C-acetate compartment model overestimated blood volume and underestimated oxidation in 10 °C BAT. CONCLUSION Precise assessment of oxidation via 11 C-acetate PET requires prior information about blood volume which can be obtained by DCE-MRI or 68 Ga-DOTA PET. Since perfusion can change rapidly, simultaneous PET-MRI would be preferred.
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Affiliation(s)
- Gabriel Richard
- Sherbrooke Molecular Imaging Center, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Christophe Noll
- Division of Endocrinology, Department of Medicine, Centre de recherche du CHUS, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Mélanie Archambault
- Sherbrooke Molecular Imaging Center, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Réjean Lebel
- Sherbrooke Molecular Imaging Center, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Luc Tremblay
- Sherbrooke Molecular Imaging Center, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Samia Ait-Mohand
- Sherbrooke Molecular Imaging Center, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Brigitte Guérin
- Sherbrooke Molecular Imaging Center, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Denis P Blondin
- Division of Neurology, Department of Medicine, Centre de recherche du CHUS, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - André C Carpentier
- Division of Endocrinology, Department of Medicine, Centre de recherche du CHUS, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Martin Lepage
- Sherbrooke Molecular Imaging Center, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada
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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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82
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Multiorgan contribution to non-shivering and shivering thermogenesis and vascular responses during gradual cold exposure in humans. Eur J Appl Physiol 2020; 120:2737-2747. [PMID: 32948898 DOI: 10.1007/s00421-020-04496-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 09/05/2020] [Indexed: 10/23/2022]
Abstract
PURPOSE Human brown adipose tissue (BAT) is known to be a significant thermoeffector in non-shivering thermogenesis (NST), albeit with individual variations in the BAT activity. We hypothesized that humans with less BAT would have more contribution from the skeletal muscle (SM) to NST or earlier shivering onset and greater vasoconstriction to compensate for less BAT-mediated thermogenesis. METHODS Eighteen males participated in this study. Their BAT activity and detectable volume were investigated. A gradual cold exposure was conducted for inducing NST at 18.6 °C and initiating shivering at 11.6 °C. The energy expenditure, electromyograph of the pectoralis major, skin blood flow, and rectal (Tre) and skin temperatures were evaluated. RESULTS BAT volume significantly correlated with the change in metabolic heat production during mild cold phase relative to baseline (NST; r = 0.562, P < 0.05), but not with shivering initiation phase (NST+ ST). SM mass correlated with baseline metabolic heat production (Mbase; r = 0.839, P < 0.01) but not with NST or NST + ST. A positive correlation was noted between BAT volume and Tre at the end of the 18.6 °C exposure period (r = 0.586, P < 0.05), which positively correlated with shivering onset time (r = 0.553, P < 0.05). The skin blood flow, mean skin temperature, and forearm and finger skin temperature difference at the end of the 18.6 °C exposure period did not correlate with NST or BAT volume. CONCLUSION BAT volume positively correlated with NST. Notably, lower Tre in individuals with less BAT volume induced earlier shivering onset for offsetting the less NST. Whereas, no correlation between metabolic and vasomotor responses was observed.
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Fischer JGW, Maushart CI, Becker AS, Müller J, Madoerin P, Chirindel A, Wild D, Ter Voert EEGW, Bieri O, Burger I, Betz MJ. Comparison of [ 18F]FDG PET/CT with magnetic resonance imaging for the assessment of human brown adipose tissue activity. EJNMMI Res 2020; 10:85. [PMID: 32699996 PMCID: PMC7376767 DOI: 10.1186/s13550-020-00665-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 06/25/2020] [Indexed: 12/26/2022] Open
Abstract
Background Brown adipose tissue (BAT) is a thermogenic tissue which can generate heat in response to mild cold exposure. As it constitutes a promising target in the fight against obesity, we need reliable techniques to quantify its activity in response to therapeutic interventions. The current standard for the quantification of BAT activity is [18F]FDG PET/CT. Various sequences in magnetic resonance imaging (MRI), including those measuring its relative fat content (fat fraction), have been proposed and evaluated in small proof-of-principle studies, showing diverging results. Here, we systematically compare the predictive value of adipose tissue fat fraction measured by MRI to the results of [18F]FDG PET/CT. Methods We analyzed the diagnostic reliability of MRI measured fat fraction (FF) for the estimation of human BAT activity in two cohorts of healthy volunteers participating in two prospective clinical trials (NCT03189511, NCT03269747). In both cohorts, BAT activity was stimulated by mild cold exposure. In cohort 1, we performed [18F]FDG PET/MRI; in cohort 2, we used [18F]FDG PET/CT followed by MRI. Fat fraction was determined by 2-point Dixon and 6-point Dixon measurement, respectively. Fat fraction values were compared to SUVmean in the corresponding tissue depot by simple linear regression. Results In total, 33 male participants with a mean age of 23.9 years and a mean BMI of 22.8 kg/m2 were recruited. In 32 participants, active BAT was visible. On an intra-individual level, FF was significantly lower in high-SUV areas compared to low-SUV areas (cohort 1: p < 0.0001 and cohort 2: p = 0.0002). The FF of the supraclavicular adipose tissue depot was inversely related to its metabolic activity (SUVmean) in both cohorts (cohort 1: R2 = 0.18, p = 0.09 and cohort 2: R2 = 0.42, p = 0.009). Conclusion MRI FF explains only about 40% of the variation in BAT glucose uptake. Thus, it can currently not be used to substitute [18F] FDG PET-based imaging for quantification of BAT activity. Trial registration ClinicalTrials.gov. NCT03189511, registered on June 17, 2017, actual study start date was on May 31, 2017, retrospectively registered. NCT03269747, registered on September 01, 2017.
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Affiliation(s)
- Jonas Gabriel William Fischer
- Department of Endocrinology, Diabetes and Metabolism, University Hospital Basel, Petersgraben 4, 4031 Basel, Switzerland, and University of Basel, Basel, Switzerland
| | - Claudia Irene Maushart
- Department of Endocrinology, Diabetes and Metabolism, University Hospital Basel, Petersgraben 4, 4031 Basel, Switzerland, and University of Basel, Basel, Switzerland
| | - Anton S Becker
- Institute of Diagnostic and Interventional Radiology, University Hospital Zürich, Rämistrasse 100, 8091, Zürich, Switzerland
| | - Julian Müller
- Department of Nuclear Medicine, University Hospital Zürich, Rämistrasse 100, Zürich, 8091, Switzerland
| | - Philipp Madoerin
- Department of Radiology, Division of Radiological Physics, University Hospital Basel, Basel, Switzerland
| | - Alin Chirindel
- Division of Nuclear Medicine, University Hospital Basel, Petersgraben 4, 4031, Basel, Switzerland
| | - Damian Wild
- Division of Nuclear Medicine, University Hospital Basel, Petersgraben 4, 4031, Basel, Switzerland
| | - Edwin E G W Ter Voert
- Department of Nuclear Medicine, University Hospital Zürich, Rämistrasse 100, Zürich, 8091, Switzerland
| | - Oliver Bieri
- Department of Radiology, University Hospital of Basel and University of Basel, Basel, Switzerland
| | - Irene Burger
- Department of Nuclear Medicine, University Hospital Zürich, Rämistrasse 100, Zürich, 8091, Switzerland
| | - Matthias Johannes Betz
- Department of Endocrinology, Diabetes and Metabolism, University Hospital Basel, Petersgraben 4, 4031 Basel, Switzerland, and University of Basel, Basel, Switzerland.
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Effects of time-restricted feeding on body weight, body composition and vital signs in low-income women with obesity: A 12-month randomized clinical trial. Clin Nutr 2020; 40:759-766. [PMID: 32713721 DOI: 10.1016/j.clnu.2020.06.036] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 06/05/2020] [Accepted: 06/27/2020] [Indexed: 01/21/2023]
Abstract
BACKGROUND & AIMS Time-restricted feeding (TRF) studies usually are of short-term, involving heterogeneous populations, without a control group with similar energy restriction. Besides, it seldom assess vital signs such as body temperature and heart rate, which may be influenced by the fasting state. In this investigation, we assessed the long-term effects of TRF on body weight, body composition and vital signs of low-income women with obesity undergoing diets with the same energy deficit. METHODS Low-income women with obesity were randomly allocated to a group with a hypoenergetic diet and 12 h of TRF or to a group with only a hypoenergetic diet, for 12 months. Body fat and waist circumference were estimated using a tetrapolar electrical bioimpedance and an inelastic measuring tape, respectively, at baseline and after 4, 6 and 12 months of intervention. Systolic and diastolic blood pressure, heart rate, and axillary temperature were measured at baseline and 12 months of intervention. The energy content of the diets was determined based on the women's resting metabolic rate (by indirect calorimetry) and level of physical activity (by triaxial accelerometers). Effects were analyzed using an intention-to-treat approach. RESULTS Fifty-eight women were randomized and 31 (53.44%) were lost to follow-up at 12 months. Dropout rates were similar between groups. In the intention-to-treat analysis, there were no significant changes in the body weight after 12 months (Differences in changes from baseline between groups: -0.05 95%CI [-2.34; 2.24] Kg; p = 0.96). An increase in axillary temperature (0.40 °C, 95% CI [-0.14; 0.67]°C, p < 0.01), a reduction in the percentage of body fat (-1.64%, 95% CI [-3.08; -0.19]%, p = 0.02) and waist circumference (-2.57 cm, 95% CI [-5.73; 0.58] cm, p = 0.03 in the mixed model involving 4 measurements) were observed in the intervention group, when compared to the control group. CONCLUSIONS TRF showed no effects on weight loss. Nevertheless the findings on waist circumference and body fat, although not clinically meaningful, suggest that this strategy may help in the long-term management of obesity in this population, since it is an easy to apply intervention. Axillary temperature findings warrants further investigation. Registered under www.ensaiosclinicos.gov.br Identifier no. RBR-387v6v. TRIAL REGISTRATION http://www.ensaiosclinicos.gov.br/rg/RBR-387v6v/.
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85
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Carpentier AC. Branched-chain Amino Acid Catabolism by Brown Adipose Tissue. Endocrinology 2020; 161:5820622. [PMID: 32296814 PMCID: PMC7286613 DOI: 10.1210/endocr/bqaa060] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Revised: 04/10/2020] [Accepted: 04/13/2020] [Indexed: 12/12/2022]
Affiliation(s)
- André C Carpentier
- Division of Endocrinology, Department of Medicine, Centre de recherche du CHUS, Université de Sherbrooke, Sherbrooke, Quebec, Canada
- Correspondence: Dr. André C. Carpentier, Division of Endocrinology, Faculty of Medicine, University of Sherbrooke, 3001, 12th Ave North, Sherbrooke, Quebec, Canada J1H 5N4. E-mail:
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86
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Mawhinney C, Heinonen I, Low DA, Han C, Jones H, Kalliokoski KK, Kirjavainen A, Kemppainen J, Di Salvo V, Weston M, Cable T, Gregson W. Changes in quadriceps femoris muscle perfusion following different degrees of cold-water immersion. J Appl Physiol (1985) 2020; 128:1392-1401. [PMID: 32352343 DOI: 10.1152/japplphysiol.00833.2019] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
We examined the influence of graded cold-water immersion (CWI) on global and regional quadriceps muscle perfusion with positron emission tomography (PET) and [15O]H2O. In 30 healthy men [33 ± 8 yr; 81 ± 10 kg; 184 ± 5 cm; percentage body fat: 13 ± 5%; peak oxygen uptake (V̇o2peak): 47 ± 8 mL·kg-1·min-1] quadriceps perfusion, thigh and calf cutaneous vascular conductance (CVC), intestinal, muscle, and local skin temperatures, thermal comfort, mean arterial pressure, and heart rate were assessed before and after 10 min of CWI at 8°C, 15°C, or 22°C. Global quadriceps perfusion did not change beyond a clinically relevant threshold (0.75 mL·100 g·min-1) in any condition and was similar between conditions {range of differences [95% confidence interval (CI)]: 0.1 mL·100 g·min-1 (-0.9 to 1.2 mL·100 g·min-1) to 0.9 mL·100 g·min-1 (-0.2 to 1.9 mL·100 g·min-1)}. Muscle perfusion was greater in vastus intermedius (VI) compared with vastus lateralis (VL) (2.2 mL·100 g·min-1; 95% CI 1.5 to 3.0 mL·100 g·min-1) and rectus femoris (RF) (2.2 mL·100 g·min-1; 1.4 to 2.9 mL·100 g·min-1). A clinically relevant increase in VI muscle perfusion after immersion at 8°C and a decrease in RF muscle perfusion at 15°C were observed. A clinically relevant increase in perfusion was observed in VI in 8°C compared with 22°C water (2.3 mL·100 g·min-1; 1.1 to 3.5 mL·100 g·min-1). There were no clinically relevant between-condition differences in thigh CVC. Our findings suggest that CWI (8-22°C) does not reduce global quadriceps muscle perfusion to a clinically relevant extent; however, colder water increases (8°C) deep muscle perfusion and reduces (15°C) superficial muscle (RF) perfusion in the quadriceps muscle.NEW & NOTEWORTHY Using positron emission tomography, we report for the first time muscle perfusion heterogeneity in the quadriceps femoris in response to different degrees of cold-water immersion (CWI). Noxious CWI temperatures (8°C) increase perfusion in the deep quadriceps muscle, whereas superficial quadriceps muscle perfusion is reduced in cooler (15°C) water. Therefore, these data have important implications for the selection of CWI approaches used in the treatment of soft tissue injury, while also increasing our understanding of the potential mechanisms underpinning CWI.
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Affiliation(s)
- Chris Mawhinney
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom.,College of Sports Science and Technology, Mahidol University, Salaya, Thailand
| | - Ilkka Heinonen
- Turku PET Centre, University of Turku and Turku University Hospital, Turku, Finland.,Department of Clinical Physiology and Nuclear Medicine, University of Turku, Turku, Finland.,Rydberg Laboratory of Applied Sciences, University of Halmstad, Halmstad, Sweden
| | - David A Low
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Chunlei Han
- Turku PET Centre, University of Turku and Turku University Hospital, Turku, Finland
| | - Helen Jones
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Kari K Kalliokoski
- Turku PET Centre, University of Turku and Turku University Hospital, Turku, Finland
| | - Anna Kirjavainen
- Turku PET Centre, University of Turku and Turku University Hospital, Turku, Finland
| | - Jukka Kemppainen
- Turku PET Centre, University of Turku and Turku University Hospital, Turku, Finland
| | - Valter Di Salvo
- Football Performance and Science Department, Aspire Academy, Doha, Qatar
| | - Matthew Weston
- School of Health and Social Care, Teesside University, Middlesbrough, United Kingdom.,Football Performance and Science Department, Aspire Academy, Doha, Qatar
| | - Tim Cable
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Warren Gregson
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom.,Football Performance and Science Department, Aspire Academy, Doha, Qatar
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Czech MP. Mechanisms of insulin resistance related to white, beige, and brown adipocytes. Mol Metab 2020; 34:27-42. [PMID: 32180558 PMCID: PMC6997501 DOI: 10.1016/j.molmet.2019.12.014] [Citation(s) in RCA: 125] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 12/21/2019] [Accepted: 12/23/2019] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND The diminished glucose lowering effect of insulin in obesity, called "insulin resistance," is associated with glucose intolerance, type 2 diabetes, and other serious maladies. Many publications on this topic have suggested numerous hypotheses on the molecular and cellular disruptions that contribute to the syndrome. However, significant uncertainty remains on the mechanisms of its initiation and long-term maintenance. SCOPE OF REVIEW To simplify insulin resistance analysis, this review focuses on the unifying concept that adipose tissue is a central regulator of systemic glucose homeostasis by controlling liver and skeletal muscle metabolism. Key aspects of adipose function related to insulin resistance reviewed are: 1) the modes by which specific adipose tissues control hepatic glucose output and systemic glucose disposal, 2) recently acquired understanding of the underlying mechanisms of these modes of regulation, and 3) the steps in these pathways adversely affected by obesity that cause insulin resistance. MAJOR CONCLUSIONS Adipocyte heterogeneity is required to mediate the multiple pathways that control systemic glucose tolerance. White adipocytes specialize in sequestering triglycerides away from the liver, muscle, and other tissues to limit toxicity. In contrast, brown/beige adipocytes are very active in directly taking up glucose in response to β adrenergic signaling and insulin and enhancing energy expenditure. Nonetheless, white, beige, and brown adipocytes all share the common feature of secreting factors and possibly exosomes that act on distant tissues to control glucose homeostasis. Obesity exerts deleterious effects on each of these adipocyte functions to cause insulin resistance.
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Affiliation(s)
- Michael P Czech
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA.
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88
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Carreau AM, Noll C, Blondin DP, Frisch F, Nadeau M, Pelletier M, Phoenix S, Cunnane SC, Guérin B, Turcotte EE, Lebel S, Biertho L, Tchernof A, Carpentier AC. Bariatric Surgery Rapidly Decreases Cardiac Dietary Fatty Acid Partitioning and Hepatic Insulin Resistance Through Increased Intra-abdominal Adipose Tissue Storage and Reduced Spillover in Type 2 Diabetes. Diabetes 2020; 69:567-577. [PMID: 31915151 DOI: 10.2337/db19-0773] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 01/01/2020] [Indexed: 11/13/2022]
Abstract
Reduced storage of dietary fatty acids (DFAs) in abdominal adipose tissues with enhanced cardiac partitioning has been shown in subjects with type 2 diabetes (T2D) and prediabetes. We measured DFA metabolism and organ partitioning using positron emission tomography with oral and intravenous long-chain fatty acid and glucose tracers during a standard liquid meal in 12 obese subjects with T2D before and 8-12 days after bariatric surgery (sleeve gastrectomy or sleeve gastrectomy and biliopancreatic diversion with duodenal switch). Bariatric surgery reduced cardiac DFA uptake from a median (standard uptake value [SUV]) 1.75 (interquartile range 1.39-2.57) before to 1.09 (1.04-1.53) after surgery (P = 0.01) and systemic DFA spillover from 56.7 mmol before to 24.7 mmol over 6 h after meal intake after surgery (P = 0.01), with a significant increase in intra-abdominal adipose tissue DFA uptake from 0.15 (0.04-0.31] before to 0.49 (0.20-0.59) SUV after surgery (P = 0.008). Hepatic insulin resistance was significantly reduced in close association with increased DFA storage in intra-abdominal adipose tissues (r = -0.79, P = 0.05) and reduced DFA spillover (r = 0.76, P = 0.01). We conclude that bariatric surgery in subjects with T2D rapidly reduces cardiac DFA partitioning and hepatic insulin resistance at least in part through increased intra-abdominal DFA storage and reduced spillover.
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Affiliation(s)
- Anne-Marie Carreau
- Division of Endocrinology, Department of Medicine, Centre de recherche du CHU de Sherbrooke, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Christophe Noll
- Division of Endocrinology, Department of Medicine, Centre de recherche du CHU de Sherbrooke, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Denis P Blondin
- Division of Endocrinology, Department of Medicine, Centre de recherche du CHU de Sherbrooke, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Frédérique Frisch
- Division of Endocrinology, Department of Medicine, Centre de recherche du CHU de Sherbrooke, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Mélanie Nadeau
- Centre de recherche de l'Institut universitaire de cardiologie et pneumologie de Québec, Québec, Québec, Canada
| | - Mélissa Pelletier
- Centre de recherche de l'Institut universitaire de cardiologie et pneumologie de Québec, Québec, Québec, Canada
| | - Serge Phoenix
- Department of Nuclear Medicine and Radiobiology, Centre de recherche du CHU de Sherbrooke, Université de Sherbrooke, Québec, Canada
| | - Stephen C Cunnane
- Research Center on Aging, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Brigitte Guérin
- Department of Nuclear Medicine and Radiobiology, Centre de recherche du CHU de Sherbrooke, Université de Sherbrooke, Québec, Canada
| | - Eric E Turcotte
- Department of Nuclear Medicine and Radiobiology, Centre de recherche du CHU de Sherbrooke, Université de Sherbrooke, Québec, Canada
| | - Stéfane Lebel
- Centre de recherche de l'Institut universitaire de cardiologie et pneumologie de Québec, Québec, Québec, Canada
| | - Laurent Biertho
- Centre de recherche de l'Institut universitaire de cardiologie et pneumologie de Québec, Québec, Québec, Canada
| | - André Tchernof
- Centre de recherche de l'Institut universitaire de cardiologie et pneumologie de Québec, Québec, Québec, Canada
- School of Nutrition, Université Laval, Québec, Québec, Canada
| | - André C Carpentier
- Division of Endocrinology, Department of Medicine, Centre de recherche du CHU de Sherbrooke, Université de Sherbrooke, Sherbrooke, Québec, Canada
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Sanchez-Delgado G, Acosta FM, Martinez-Tellez B, Finlayson G, Gibbons C, Labayen I, Llamas-Elvira JM, Gil A, Blundell JE, Ruiz JR. Brown adipose tissue volume and 18F-fluorodeoxyglucose uptake are not associated with energy intake in young human adults. Am J Clin Nutr 2020; 111:329-339. [PMID: 31826235 PMCID: PMC6997092 DOI: 10.1093/ajcn/nqz300] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Accepted: 11/13/2019] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Several studies have explored the role of human brown adipose tissue (BAT) in energy expenditure. However, the link between BAT and appetite regulation needs to be more rigorously examined. OBJECTIVES We aimed to investigate the associations of BAT volume and 18F-fluordeoxyglucose (18F-FDG) uptake after a personalized cold exposure with energy intake and appetite-related sensations in young healthy humans. METHODS A total of 102 young adults (65 women; age: 22.08 ± 2.17 y; BMI: 25.05 ± 4.93 kg/m 2) took part in this cross-sectional study. BAT volume, BAT 18F-FDG uptake, and skeletal muscle 18F-FDG uptake were assessed by means of static 18F-FDG positron-emission tomography and computed tomography scans after a 2-h personalized exposure to cold. Energy intake was estimated via an objectively measured ad libitum meal and three nonconsecutive 24-h dietary recalls. Appetite-related sensations (i.e., hunger and fullness) were recorded by visual analog scales before and after a standardized breakfast (energy content = 50% of basal metabolic rate) and the ad libitum meal. Body composition was assessed by a whole-body DXA scan. RESULTS BAT volume and 18F-FDG uptake were not associated with quantified ad libitum energy intake (all P > 0.088), nor with habitual energy intake estimated from the 24-h dietary recalls (all P > 0.683). Lean mass was positively associated with both the energy intake from the ad libitum meal (β: 17.612, R2 = 0.213; P < 0.001) and the habitual energy intake (β: 16.052, R2 = 0.123; P = 0.001). Neither the interaction BAT volume × time elapsed after meal consumption nor that of BAT 18F-FDG uptake × time elapsed after meal consumption had any significant influence on appetite-related sensations after breakfast or after meal consumption (all P > 0.3). CONCLUSIONS Neither BAT volume, nor BAT 18F-FDG uptake after cold stimulation, are related to appetite regulation in young adults. These results suggest BAT plays no important role in the regulation of energy intake in humans.This trial was registered at clinicaltrials.gov as NCT02365129.
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Affiliation(s)
- Guillermo Sanchez-Delgado
- PROFITH (PROmoting FITness and Health through Physical Activity) Research Group, Sport and Health University Research Institute (iMUDS), Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain,Address correspondence to GS-D (e-mail: )
| | - Francisco M Acosta
- PROFITH (PROmoting FITness and Health through Physical Activity) Research Group, Sport and Health University Research Institute (iMUDS), 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, Sport and Health University Research Institute (iMUDS), Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain,Department of Medicine, Division of Endocrinology, and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Centre, Leiden, the Netherlands
| | - Graham Finlayson
- School of Psychology, Faculty of Medicine and Health, University of Leeds, Leeds, United Kingdom
| | - Catherine Gibbons
- School of Psychology, Faculty of Medicine and Health, University of Leeds, Leeds, United Kingdom
| | - Idoia Labayen
- ELIKOS Research Group, Institute for Innovation & Sustainable Development in Food Chain (IS-FOOD), Department of Health Sciences, Public University of Navarra, Pamplona, 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
| | - Angel Gil
- Department of Biochemistry and Molecular Biology II, Institute of Nutrition and Food Technology, Centre for Biomedical Research, University of Granada, Granada, Spain,Biomedical Research Networking Center for Physiopathology of Obesity and Nutrition (CIBEROBN), Carlos III Health Institute, Madrid, Spain
| | - John E Blundell
- School of Psychology, Faculty of Medicine and Health, University of Leeds, Leeds, United Kingdom
| | - Jonatan R Ruiz
- PROFITH (PROmoting FITness and Health through Physical Activity) Research Group, Sport and Health University Research Institute (iMUDS), Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
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90
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Lømo T, Eken T, Bekkestad Rein E, Njå A. Body temperature control in rats by muscle tone during rest or sleep. Acta Physiol (Oxf) 2020; 228:e13348. [PMID: 31342662 DOI: 10.1111/apha.13348] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 07/17/2019] [Accepted: 07/19/2019] [Indexed: 12/24/2022]
Abstract
AIM To explore the role of tonic motor unit activity in body temperature control. METHODS Motor unit activity in soleus and several other skeletal muscles was recorded electromyographically from adult rats placed in a climate chamber on a load sensitive floor, which, together with video monitoring, allowed detection of every successive period of movement and no movement. RESULTS In the absence of movements during rest or sleep, motor unit activity was exclusively tonic and therefore equivalent to muscle tone as defined here. The amount of tonic activity increased linearly in the soleus as the ambient temperature decreased from 32°C to below 7°C, owing to progressive recruitment and increased firing rate of individual units. Brief movements occurred randomly and frequently during rest or sleep in association with brief facilitation or inhibition of motor neurons that turned tonic motor unit activity on or off, partitioning the tonic activity among the available motor units. Shivering first appeared when a falling ambient temperature reached ≤7°C in several muscles except soleus, which was as active between shivering bursts as during them. CONCLUSION Muscle tone and overt shivering are strikingly different phenomena. Tonic motor unit activity in the absence of movements evokes isometric contractions and, therefore, generates heat. Accordingly, when the amount of tonic activity increases with falling ambient temperature, so must heat production. Consequently, graded muscle tone appears as an important and independent mechanism for thermogenesis during rest or sleep at ambient temperatures ranging from <7°C to at least 32°C.
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Affiliation(s)
- Terje Lømo
- Institute of Basic Medical Sciences University of Oslo Oslo Norway
| | - Torsten Eken
- Department of Anaesthesiology Oslo University Hospital Oslo Norway
| | | | - Arild Njå
- Institute of Basic Medical Sciences University of Oslo Oslo Norway
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91
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Reliability and validity of methods in the assessment of cold-induced shivering thermogenesis. Eur J Appl Physiol 2020; 120:591-601. [PMID: 31955279 PMCID: PMC7042274 DOI: 10.1007/s00421-019-04288-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 12/11/2019] [Indexed: 01/04/2023]
Abstract
PURPOSE To compare two analytical methods for the estimation of the shivering onset inflection point, segmental regression and visual inspection of data, and to assess the test-retest reliability and validity of four metrics of shivering measurement; oxygen uptake (V̇O2), electromyography (EMG), mechanomyography (MMG) and bedside shivering assessment scale (BSAS). METHODS Ten volunteers attended three identical experimental sessions involving passive deep-body cooling via cold water immersion at 10 °C. V̇O2, EMG, and MMG were continuously assessed, while the time elapsed at each BSAS stage was recorded. Metrics were graphed as a function of time and rectal temperature (Tre). Inflection points for intermittent and constant shivering were visually identified for every graph and compared to segmental regression. RESULTS Excellent agreement was seen between segmental regression and visual inspection (ICC, 0.92). All measurement metrics presented good-to-excellent test-retest reliability (ICC's > 0.75 and 0.90 respectively), with the exception of visual identification of intermittent shivering for V̇O2 measurement (ICC, 0.73) and segmental regression for EMG measurement (ICC, 0.74). In the assessment of signal-to-noise ratio (SNR), EMG showed the largest SNR at the point of shivering onset followed by MMG and finally V̇O2. CONCLUSIONS Segmental regression provides a successful analytical method for identifying shivering onset. Good-to-excellent reliability can be seen across V̇O2, EMG, MMG, and BSAS, yet given the observed lag times, SNRs, along with known advantages/disadvantaged of each metric, it is recommended that no single metric is used in isolation. An integrative, real-time measure of shivering is proposed.
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92
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Hamaoka T, Nirengi S, Fuse S, Amagasa S, Kime R, Kuroiwa M, Endo T, Sakane N, Matsushita M, Saito M, Yoneshiro T, Kurosawa Y. Near-Infrared Time-Resolved Spectroscopy for Assessing Brown Adipose Tissue Density in Humans: A Review. Front Endocrinol (Lausanne) 2020; 11:261. [PMID: 32508746 PMCID: PMC7249345 DOI: 10.3389/fendo.2020.00261] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 04/08/2020] [Indexed: 01/24/2023] Open
Abstract
Brown adipose tissue (BAT) mediates adaptive thermogenesis upon food intake and cold exposure, thus potentially contributing to the prevention of lifestyle-related diseases. 18F-fluorodeoxyglucose (FDG)-positron emission tomography (PET) with computed tomography (CT) (18FDG-PET/CT) is a standard method for assessing BAT activity and volume in humans. 18FDG-PET/CT has several limitations, including high device cost and ionizing radiation and acute cold exposure necessary to maximally stimulate BAT activity. In contrast, near-infrared spectroscopy (NIRS) has been used for measuring changes in O2-dependent light absorption in the tissue in a non-invasive manner, without using radiation. Among NIRS, time-resolved NIRS (NIRTRS) can quantify the concentrations of oxygenated and deoxygenated hemoglobin ([oxy-Hb] and [deoxy-Hb], respectively) by emitting ultrashort (100 ps) light pulses and counts photons, which are scattered and absorbed in the tissue. The basis for assessing BAT density (BAT-d) using NIRTRS is that the vascular density in the supraclavicular region, as estimated using Hb concentration, is higher in BAT than in white adipose tissue. In contrast, relatively low-cost continuous wavelength NIRS (NIRCWS) is employed for measuring relative changes in oxygenation in tissues. In this review, we provide evidence for the validity of NIRTRS and NIRCWS in estimating human BAT characteristics. The indicators (IndNIRS) examined were [oxy-Hb]sup, [deoxy-Hb]sup, total hemoglobin [total-Hb]sup, Hb O2 saturation (StO2sup), and reduced scattering coefficient ( μs sup' ) in the supraclavicular region, as determined by NIRTRS, and relative changes in corresponding parameters, as determined by NIRCWS. The evidence comprises the relationships between the IndNIRS investigated and those determined by 18FDG-PET/CT; the correlation between the IndNIRS and cold-induced thermogenesis; the relationship of the IndNIRS to parameters measured by 18FDG-PET/CT, which responded to seasonal temperature fluctuations; the relationship of the IndNIRS and plasma lipid metabolites; the analogy of the IndNIRS to chronological and anthropometric data; and changes in the IndNIRS following thermogenic food supplementation. The [total-Hb]sup and [oxy-Hb]sup determined by NIRTRS, but not parameters determined by NIRCWS, exhibited significant correlations with cold-induced thermogenesis parameters and plasma androgens in men in winter or analogies to 18FDG-PET. We conclude that NIRTRS can provide useful information for assessing BAT-d in a simple, rapid, non-invasive way, although further validation study is still needed.
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Affiliation(s)
- Takafumi Hamaoka
- Department of Sports Medicine for Health Promotion, Tokyo Medical University, Tokyo, Japan
- *Correspondence: Takafumi Hamaoka
| | - Shinsuke Nirengi
- Division of Preventive Medicine, National Hospital Organization Kyoto Medical Center, Clinical Research Institute, Kyoto, Japan
- Dorothy M. Davis Heart and Lung Research Institute, Wexner Medical Center, Columbus, OH, United States
| | - Sayuri Fuse
- Department of Sports Medicine for Health Promotion, Tokyo Medical University, Tokyo, Japan
| | - Shiho Amagasa
- Department of Preventive Medicine and Public Health, Tokyo Medical University, Tokyo, Japan
| | - Ryotaro Kime
- Department of Sports Medicine for Health Promotion, Tokyo Medical University, Tokyo, Japan
| | - Miyuki Kuroiwa
- Department of Sports Medicine for Health Promotion, Tokyo Medical University, Tokyo, Japan
| | - Tasuki Endo
- Department of Sports Medicine for Health Promotion, Tokyo Medical University, Tokyo, Japan
| | - Naoki Sakane
- Division of Preventive Medicine, National Hospital Organization Kyoto Medical Center, Clinical Research Institute, Kyoto, Japan
| | | | - Masayuki Saito
- Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan
| | - Takeshi Yoneshiro
- Diabetes Center, University of California San Francisco, San Francisco, CA, United States
| | - Yuko Kurosawa
- Department of Sports Medicine for Health Promotion, Tokyo Medical University, Tokyo, Japan
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93
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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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94
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Chen KY, Brychta RJ, Abdul Sater Z, Cassimatis TM, Cero C, Fletcher LA, Israni NS, Johnson JW, Lea HJ, Linderman JD, O'Mara AE, Zhu KY, Cypess AM. Opportunities and challenges in the therapeutic activation of human energy expenditure and thermogenesis to manage obesity. J Biol Chem 2019; 295:1926-1942. [PMID: 31914415 DOI: 10.1074/jbc.rev119.007363] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The current obesity pandemic results from a physiological imbalance in which energy intake chronically exceeds energy expenditure (EE), and prevention and treatment strategies remain generally ineffective. Approaches designed to increase EE have been informed by decades of experiments in rodent models designed to stimulate adaptive thermogenesis, a long-term increase in metabolism, primarily induced by chronic cold exposure. At the cellular level, thermogenesis is achieved through increased rates of futile cycling, which are observed in several systems, most notably the regulated uncoupling of oxidative phosphorylation from ATP generation by uncoupling protein 1, a tissue-specific protein present in mitochondria of brown adipose tissue (BAT). Physiological activation of BAT and other organ thermogenesis occurs through β-adrenergic receptors (AR), and considerable effort over the past 5 decades has been directed toward developing AR agonists capable of safely achieving a net negative energy balance while avoiding unwanted cardiovascular side effects. Recent discoveries of other BAT futile cycles based on creatine and succinate have provided additional targets. Complicating the current and developing pharmacological-, cold-, and exercise-based methods to increase EE is the emerging evidence for strong physiological drives toward restoring lost weight over the long term. Future studies will need to address technical challenges such as how to accurately measure individual tissue thermogenesis in humans; how to safely activate BAT and other organ thermogenesis; and how to sustain a negative energy balance over many years of treatment.
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Affiliation(s)
- Kong Y Chen
- Diabetes, Endocrinology, and Obesity Branch, Intramural Research Program, NIDDK, National Institutes of Health, Bethesda, Maryland 20892.
| | - Robert J Brychta
- Diabetes, Endocrinology, and Obesity Branch, Intramural Research Program, NIDDK, National Institutes of Health, Bethesda, Maryland 20892
| | - Zahraa Abdul Sater
- Diabetes, Endocrinology, and Obesity Branch, Intramural Research Program, NIDDK, National Institutes of Health, Bethesda, Maryland 20892
| | - Thomas M Cassimatis
- Diabetes, Endocrinology, and Obesity Branch, Intramural Research Program, NIDDK, National Institutes of Health, Bethesda, Maryland 20892
| | - Cheryl Cero
- Diabetes, Endocrinology, and Obesity Branch, Intramural Research Program, NIDDK, National Institutes of Health, Bethesda, Maryland 20892
| | - Laura A Fletcher
- Diabetes, Endocrinology, and Obesity Branch, Intramural Research Program, NIDDK, National Institutes of Health, Bethesda, Maryland 20892
| | - Nikita S Israni
- Diabetes, Endocrinology, and Obesity Branch, Intramural Research Program, NIDDK, National Institutes of Health, Bethesda, Maryland 20892
| | - James W Johnson
- Diabetes, Endocrinology, and Obesity Branch, Intramural Research Program, NIDDK, National Institutes of Health, Bethesda, Maryland 20892
| | - Hannah J Lea
- Diabetes, Endocrinology, and Obesity Branch, Intramural Research Program, NIDDK, National Institutes of Health, Bethesda, Maryland 20892
| | - Joyce D Linderman
- Diabetes, Endocrinology, and Obesity Branch, Intramural Research Program, NIDDK, National Institutes of Health, Bethesda, Maryland 20892
| | - Alana E O'Mara
- Diabetes, Endocrinology, and Obesity Branch, Intramural Research Program, NIDDK, National Institutes of Health, Bethesda, Maryland 20892
| | - Kenneth Y Zhu
- Diabetes, Endocrinology, and Obesity Branch, Intramural Research Program, NIDDK, National Institutes of Health, Bethesda, Maryland 20892
| | - Aaron M Cypess
- Diabetes, Endocrinology, and Obesity Branch, Intramural Research Program, NIDDK, National Institutes of Health, Bethesda, Maryland 20892.
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Lynes MD, Shamsi F, Sustarsic EG, Leiria LO, Wang CH, Su SC, Huang TL, Gao F, Narain NR, Chen EY, Cypess AM, Schulz TJ, Gerhart-Hines Z, Kiebish MA, Tseng YH. Cold-Activated Lipid Dynamics in Adipose Tissue Highlights a Role for Cardiolipin in Thermogenic Metabolism. Cell Rep 2019; 24:781-790. [PMID: 30021173 DOI: 10.1016/j.celrep.2018.06.073] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 05/07/2018] [Accepted: 06/15/2018] [Indexed: 12/20/2022] Open
Abstract
Thermogenic fat expends energy during cold for temperature homeostasis, and its activity regulates nutrient metabolism and insulin sensitivity. We measured cold-activated lipid landscapes in circulation and in adipose tissue by MS/MSALL shotgun lipidomics. We created an interactive online viewer to visualize the changes of specific lipid species in response to cold. In adipose tissue, among the approximately 1,600 lipid species profiled, we identified the biosynthetic pathway of the mitochondrial phospholipid cardiolipin as coordinately activated in brown and beige fat by cold in wild-type and transgenic mice with enhanced browning of white fat. Together, these data provide a comprehensive lipid bio-signature of thermogenic fat activation in circulation and tissue and suggest pathways regulated by cold exposure.
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Affiliation(s)
- Matthew D Lynes
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA
| | - Farnaz Shamsi
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA
| | - Elahu Gosney Sustarsic
- The Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
| | - Luiz O Leiria
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA
| | - Chih-Hao Wang
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA
| | - Sheng-Chiang Su
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA
| | - Tian Lian Huang
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA
| | - Fei Gao
- BERG, Framingham, MA 01701, USA
| | | | | | | | - Tim J Schulz
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA; German Institute of Human Nutrition, Potsdam-Rehbrücke, Germany
| | - Zachary Gerhart-Hines
- The Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
| | | | - Yu-Hua Tseng
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA; Harvard Stem Cell Institute, Harvard University, Cambridge, MA 02138, USA.
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96
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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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Lewis JE, Monnier C, Marshall H, Fowler M, Green R, Cooper S, Chiotellis A, Luckett J, Perkins AC, Coskun T, Adams AC, Samms RJ, Ebling FJP, Tsintzas K. Whole-body and adipose tissue-specific mechanisms underlying the metabolic effects of fibroblast growth factor 21 in the Siberian hamster. Mol Metab 2019; 31:45-54. [PMID: 31918921 PMCID: PMC6889485 DOI: 10.1016/j.molmet.2019.10.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 10/19/2019] [Accepted: 10/30/2019] [Indexed: 12/15/2022] Open
Abstract
Objective Fibroblast growth factor 21 (FGF21) has been shown to rapidly lower body weight in the Siberian hamster, a preclinical model of adiposity. This induced negative energy balance mediated by FGF21 is associated with both lowered caloric intake and increased energy expenditure. Previous research demonstrated that adipose tissue (AT) is one of the primary sites of FGF21 action and may be responsible for its ability to increase the whole-body metabolic rate. The present study sought to determine the relative importance of white (subcutaneous AT [sWAT] and visceral AT [vWAT]), and brown (interscapular brown AT [iBAT]) in governing FGF21-mediated metabolic improvements using the tissue-specific uptake of glucose and lipids as a proxy for metabolic activity. Methods We used positron emission tomography-computed tomography (PET-CT) imaging in combination with both glucose (18F-fluorodeoxyglucose) and lipid (18F-4-thiapalmitate) tracers to assess the effect of FGF21 on the tissue-specific uptake of these metabolites and compared responses to a control group pair-fed to match the food intake of the FGF21-treated group. In vivo imaging was combined with ex vivo tissue-specific functional, biochemical, and molecular analyses of the nutrient uptake and signaling pathways. Results Consistent with previous findings, FGF21 reduced body weight via reduced caloric intake and increased energy expenditure in the Siberian hamster. PET-CT studies demonstrated that FGF21 increased the uptake of glucose in BAT and WAT independently of reduced food intake and body weight as demonstrated by imaging of the pair-fed group. Furthermore, FGF21 increased glucose uptake in the primary adipocytes, confirming that these in vivo effects may be due to a direct action of FGF21 at the level of the adipocytes. Mechanistically, the effects of FGF21 are associated with activation of the ERK signaling pathway and upregulation of GLUT4 protein content in all fat depots. In response to treatment with FGF21, we observed an increase in the markers of lipolysis and lipogenesis in both the subcutaneous and visceral WAT depots. In contrast, FGF21 was only able to directly increase the uptake of lipid into BAT. Conclusions These data identify brown and white fat depots as primary peripheral sites of action of FGF21 in promoting glucose uptake and also indicate that FGF21 selectively stimulates lipid uptake in brown fat, which may fuel thermogenesis. FGF21 increases glucose and lipid uptake in adipose tissue. The selective FGF21-induced increase in lipid uptake in BAT may fuel thermogenesis. Unlike BAT, glucose uptake in WAT may be used for lipogenesis.
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Affiliation(s)
- Jo E Lewis
- Institute of Metabolic Sciences and MRC-Metabolic Diseases Unit, University of Cambridge, Cambridge, CB0 0QQ, UK
| | - Chloe Monnier
- School of Life Sciences, University of Nottingham Medical School, Queen's Medical Center, Nottingham, NG7 2UH, UK
| | - Hayley Marshall
- School of Life Sciences, University of Nottingham Medical School, Queen's Medical Center, Nottingham, NG7 2UH, UK
| | - Maxine Fowler
- School of Life Sciences, University of Nottingham Medical School, Queen's Medical Center, Nottingham, NG7 2UH, UK
| | - Rebecca Green
- School of Life Sciences, University of Nottingham Medical School, Queen's Medical Center, Nottingham, NG7 2UH, UK
| | - Scott Cooper
- School of Life Sciences, University of Nottingham Medical School, Queen's Medical Center, Nottingham, NG7 2UH, UK
| | - Aristeidis Chiotellis
- Radiological Sciences, School of Medicine, University of Nottingham, Queen's Medical Center, Nottingham, NG7 2UH, UK
| | - Jeni Luckett
- Radiological Sciences, School of Medicine, University of Nottingham, Queen's Medical Center, Nottingham, NG7 2UH, UK
| | - Alan C Perkins
- Radiological Sciences, School of Medicine, University of Nottingham, Queen's Medical Center, Nottingham, NG7 2UH, UK
| | - Tamer Coskun
- Eli Lilly and Company, Lilly Research Laboratories, Indianapolis, IN, 46285, USA
| | - Andrew C Adams
- Eli Lilly and Company, Lilly Research Laboratories, Indianapolis, IN, 46285, USA
| | - Ricardo J Samms
- Eli Lilly and Company, Lilly Research Laboratories, Indianapolis, IN, 46285, USA
| | - Francis J P Ebling
- School of Life Sciences, University of Nottingham Medical School, Queen's Medical Center, Nottingham, NG7 2UH, UK
| | - Kostas Tsintzas
- School of Life Sciences, University of Nottingham Medical School, Queen's Medical Center, Nottingham, NG7 2UH, UK.
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98
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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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99
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Sanchez-Delgado G, Alcantara JM, Acosta FM, Martinez-Tellez B, Amaro-Gahete FJ, Ortiz-Alvarez L, Löf M, Labayen I, Ruiz JR. Estimation of non-shivering thermogenesis and cold-induced nutrient oxidation rates: Impact of method for data selection and analysis. Clin Nutr 2019; 38:2168-2174. [DOI: 10.1016/j.clnu.2018.09.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Revised: 09/05/2018] [Accepted: 09/10/2018] [Indexed: 01/15/2023]
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100
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Coolbaugh CL, Damon BM, Bush EC, Welch EB, Towse TF. Cold exposure induces dynamic, heterogeneous alterations in human brown adipose tissue lipid content. Sci Rep 2019; 9:13600. [PMID: 31537877 PMCID: PMC6753098 DOI: 10.1038/s41598-019-49936-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 08/22/2019] [Indexed: 01/28/2023] Open
Abstract
Brown adipose tissue undergoes a dynamic, heterogeneous response to cold exposure that can include the simultaneous synthesis, uptake, and oxidation of fatty acids. The purpose of this work was to quantify these changes in brown adipose tissue lipid content (fat-signal fraction (FSF)) using fat-water magnetic resonance imaging during individualized cooling to 3 °C above a participant's shiver threshold. Eight healthy men completed familiarization, perception-based cooling, and MRI-cooling visits. FSF maps of the supraclavicular region were acquired in thermoneutrality and during cooling (59.5 ± 6.5 min). Brown adipose tissue regions of interest were defined, and voxels were grouped into FSF decades (0-10%, 10-20%…90-100%) according to their initial value. Brown adipose tissue contained a heterogeneous morphology of lipid content. Voxels with initial FSF values of 60-100% (P < 0.05) exhibited a significant decrease in FSF while a simultaneous increase in FSF occurred in voxels with initial FSF values of 0-30% (P < 0.05). These data suggest that in healthy young men, cold exposure elicits a dynamic and heterogeneous response in brown adipose tissue, with areas initially rich with lipid undergoing net lipid loss and areas of low initial lipid undergoing a net lipid accumulation.
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Affiliation(s)
- Crystal L Coolbaugh
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Bruce M Damon
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, USA.
- Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA.
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA.
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA.
| | - Emily C Bush
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, USA
| | - E Brian Welch
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | - Theodore F Towse
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Physical Medicine and Rehabilitation, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Biomedical Sciences, Grand Valley State, Allendale, MI, USA
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