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Branquinho J, Neves RL, Martin RP, Arata JG, Bittencourt CA, Araújo RC, Icimoto MY, Pesquero JB. Kinin B1 receptor deficiency promotes enhanced adipose tissue thermogenic response to β3-adrenergic stimulation. Inflamm Res 2024; 73:1565-1579. [PMID: 39017739 DOI: 10.1007/s00011-024-01917-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 07/01/2024] [Accepted: 07/04/2024] [Indexed: 07/18/2024] Open
Abstract
OBJECTIVE AND DESIGN Kinin B1 receptor (B1R) has a key role in adipocytes to protect against obesity and glycemic metabolism, thus becoming a potential target for regulation of energy metabolism and adipose tissue thermogenesis. MATERIAL OR SUBJECTS Kinin B1 knockout mice (B1KO) were subjected to acute induction with CL 316,243 and chronic cold exposure. METHODS Metabolic and histological analyses, gene and protein expression and RNA-seq were performed on interscapular brown adipose tissue (iBAT) and inguinal white adipose tissue (iWAT) of mice. RESULTS B1KO mice, under acute effect of CL 316,243, exhibited increased energy expenditure and upregulated thermogenic genes in iWAT. They were also protected from chronic cold, showing enhanced non-shivering thermogenesis with increased iBAT mass (~ 90%) and recruitment of beige adipocytes in iWAT (~ 50%). Positive modulation of thermogenic and electron transport chain genes, reaching a 14.5-fold increase for Ucp1 in iWAT. RNA-seq revealed activation of the insulin signaling pathways for iBAT and oxidative phosphorylation, tricarboxylic acid cycle, and browning pathways for iWAT. CONCLUSION B1R deficiency induced metabolic and gene expression alterations in adipose tissue, activating thermogenic pathways and increasing energy metabolism. B1R antagonists emerge as promising therapeutic targets for regulating obesity and associated metabolic disorders, such as inflammation and diabetes.
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MESH Headings
- Animals
- Male
- Mice
- Adipose Tissue, Brown/metabolism
- Adipose Tissue, Brown/drug effects
- Adipose Tissue, White/metabolism
- Adipose Tissue, White/drug effects
- Adrenergic beta-3 Receptor Agonists/pharmacology
- Cold Temperature
- Dioxoles/pharmacology
- Energy Metabolism/drug effects
- Mice, Inbred C57BL
- Mice, Knockout
- Receptor, Bradykinin B1/genetics
- Receptor, Bradykinin B1/metabolism
- Receptors, Adrenergic, beta-3/genetics
- Receptors, Adrenergic, beta-3/metabolism
- Thermogenesis/drug effects
- Thiazoles/pharmacology
- Uncoupling Protein 1/genetics
- Uncoupling Protein 1/metabolism
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Affiliation(s)
- Jéssica Branquinho
- Center for Research and Molecular Diagnostic of Genetic Diseases, Department of Biophysics, Federal University of São Paulo, São Paulo, SP, Brazil
| | - Raquel L Neves
- Center for Research and Molecular Diagnostic of Genetic Diseases, Department of Biophysics, Federal University of São Paulo, São Paulo, SP, Brazil
| | - Renan P Martin
- Center for Research and Molecular Diagnostic of Genetic Diseases, Department of Biophysics, Federal University of São Paulo, São Paulo, SP, Brazil
- McKusick-Nathans Department of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Júlia G Arata
- Center for Research and Molecular Diagnostic of Genetic Diseases, Department of Biophysics, Federal University of São Paulo, São Paulo, SP, Brazil
| | - Clarissa A Bittencourt
- Center for Research and Molecular Diagnostic of Genetic Diseases, Department of Biophysics, Federal University of São Paulo, São Paulo, SP, Brazil
| | - Ronaldo C Araújo
- Department of Biophysics, Federal University of São Paulo, São Paulo, SP, Brazil
| | - Marcelo Y Icimoto
- Department of Biophysics, Federal University of São Paulo, São Paulo, SP, Brazil.
| | - João B Pesquero
- Center for Research and Molecular Diagnostic of Genetic Diseases, Department of Biophysics, Federal University of São Paulo, São Paulo, SP, Brazil.
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2
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Carey A, Nguyen K, Kandikonda P, Kruglov V, Bradley C, Dahlquist KJV, Cholensky S, Swanson W, Badovinac VP, Griffith TS, Camell CD. Age-associated accumulation of B cells promotes macrophage inflammation and inhibits lipolysis in adipose tissue during sepsis. Cell Rep 2024; 43:113967. [PMID: 38492219 PMCID: PMC11014686 DOI: 10.1016/j.celrep.2024.113967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 02/14/2024] [Accepted: 02/29/2024] [Indexed: 03/18/2024] Open
Abstract
Non-canonical lipolysis induced by inflammatory cytokines or Toll-like receptor ligands is required for the regulation of inflammation during endotoxemia and sepsis. Canonical lipolysis induced by catecholamines declines during aging due to factors including an expansion of lymphocytes, pro-inflammatory macrophage polarization, and an increase in chronic low-grade inflammation; however, the extent to which the non-canonical pathway of lipolysis is active and impacted by immune cells during aging remains unclear. Therefore, we aimed to define the extent to which immune cells from old mice influence non-canonical lipolysis during sepsis. We identified age-associated impairments of non-canonical lipolysis and an accumulation of dysfunctional B1 B cells in the visceral white adipose tissue (vWAT) of old mice. Lifelong deficiency of B cells results in restored non-canonical lipolysis and reductions in pro-inflammatory macrophage populations. Our study suggests that targeting the B cell-macrophage signaling axis may resolve metabolic dysfunction in aged vWAT and attenuate septic severity in older individuals.
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Affiliation(s)
- Anna Carey
- Molecular Pharmacology and Therapeutics Graduate Program, Department of Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA; Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA; Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Katie Nguyen
- Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA; Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Pranathi Kandikonda
- Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA; Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Victor Kruglov
- Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA; Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Claire Bradley
- Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA; Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Korbyn J V Dahlquist
- Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA; Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Stephanie Cholensky
- Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA; Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Whitney Swanson
- Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA; Department of Urology, University of Minnesota, Minneapolis, MN 55455, USA
| | | | - Thomas S Griffith
- Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA; Department of Urology, University of Minnesota, Minneapolis, MN 55455, USA; Minneapolis VA Health Care System, Minneapolis, MN 55417, USA
| | - Christina D Camell
- Molecular Pharmacology and Therapeutics Graduate Program, Department of Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA; Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA; Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA.
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3
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Shi L, Tao Z, Zheng L, Yang J, Hu X, Scott K, de Kloet A, Krause E, Collins JF, Cheng Z. FoxO1 regulates adipose transdifferentiation and iron influx by mediating Tgfβ1 signaling pathway. Redox Biol 2023; 63:102727. [PMID: 37156218 DOI: 10.1016/j.redox.2023.102727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 04/24/2023] [Accepted: 04/30/2023] [Indexed: 05/10/2023] Open
Abstract
Adipose plasticity is critical for metabolic homeostasis. Adipocyte transdifferentiation plays an important role in adipose plasticity, but the molecular mechanism of transdifferentiation remains incompletely understood. Here we show that the transcription factor FoxO1 regulates adipose transdifferentiation by mediating Tgfβ1 signaling pathway. Tgfβ1 treatment induced whitening phenotype in beige adipocytes, reducing UCP1 and mitochondrial capacity and enlarging lipid droplets. Deletion of adipose FoxO1 (adO1KO) dampened Tgfβ1 signaling by downregulating Tgfbr2 and Smad3 and induced browning of adipose tissue in mice, increasing UCP1 and mitochondrial content and activating metabolic pathways. Silencing FoxO1 also abolished the whitening effect of Tgfβ1 on beige adipocytes. The adO1KO mice exhibited a significantly higher energy expenditure, lower fat mass, and smaller adipocytes than the control mice. The browning phenotype in adO1KO mice was associated with an increased iron content in adipose tissue, concurrent with upregulation of proteins that facilitate iron uptake (DMT1 and TfR1) and iron import into mitochondria (Mfrn1). Analysis of hepatic and serum iron along with hepatic iron-regulatory proteins (ferritin and ferroportin) in the adO1KO mice revealed an adipose tissue-liver crosstalk that meets the increased iron requirement for adipose browning. The FoxO1-Tgfβ1 signaling cascade also underlay adipose browning induced by β3-AR agonist CL316243. Our study provides the first evidence of a FoxO1-Tgfβ1 axis in the regulation of adipose browning-whitening transdifferentiation and iron influx, which sheds light on the compromised adipose plasticity in conditions of dysregulated FoxO1 and Tgfβ1 signaling.
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Affiliation(s)
- Limin Shi
- Food Science and Human Nutrition Department, University of Florida, Gainesville, FL, 32611, USA; Interdisciplinary Nutritional Sciences Doctoral Program, Center for Nutritional Sciences, University of Florida, Gainesville, FL, 32611, USA; Center for Integrative Cardiovascular and Metabolic Diseases, University of Florida, Gainesville, FL, 32610, USA
| | - Zhipeng Tao
- Department of Human Nutrition, Foods, and Exercise, Virginia Tech, Blacksburg, VA, 24061, USA; Cutaneous Biology Research Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, 02129, USA
| | - Louise Zheng
- Department of Human Nutrition, Foods, and Exercise, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Jinying Yang
- Food Science and Human Nutrition Department, University of Florida, Gainesville, FL, 32611, USA; Interdisciplinary Nutritional Sciences Doctoral Program, Center for Nutritional Sciences, University of Florida, Gainesville, FL, 32611, USA
| | - Xinran Hu
- Food Science and Human Nutrition Department, University of Florida, Gainesville, FL, 32611, USA
| | - Karen Scott
- Center for Integrative Cardiovascular and Metabolic Diseases, University of Florida, Gainesville, FL, 32610, USA; Department of Pharmacodynamics, College of Pharmacy, University of Florida, Gainesville, FL32610, USA
| | - Annette de Kloet
- Center for Integrative Cardiovascular and Metabolic Diseases, University of Florida, Gainesville, FL, 32610, USA; Department of Physiology and Functional Genomics, University of Florida College of Medicine, Gainesville, FL, 32610, USA
| | - Eric Krause
- Center for Integrative Cardiovascular and Metabolic Diseases, University of Florida, Gainesville, FL, 32610, USA; Department of Pharmacodynamics, College of Pharmacy, University of Florida, Gainesville, FL32610, USA
| | - James F Collins
- Food Science and Human Nutrition Department, University of Florida, Gainesville, FL, 32611, USA; Interdisciplinary Nutritional Sciences Doctoral Program, Center for Nutritional Sciences, University of Florida, Gainesville, FL, 32611, USA
| | - Zhiyong Cheng
- Food Science and Human Nutrition Department, University of Florida, Gainesville, FL, 32611, USA; Interdisciplinary Nutritional Sciences Doctoral Program, Center for Nutritional Sciences, University of Florida, Gainesville, FL, 32611, USA; Center for Integrative Cardiovascular and Metabolic Diseases, University of Florida, Gainesville, FL, 32610, USA; Department of Human Nutrition, Foods, and Exercise, Virginia Tech, Blacksburg, VA, 24061, USA.
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4
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Medak KD, McKie GL, Shamshoum H, Seguin I, Wright DC. The glucose lowering effects of CL 316,243 dissipate with repeated use and are rescued bycilostamide. Physiol Rep 2022; 10:e15187. [PMID: 35179321 PMCID: PMC8855634 DOI: 10.14814/phy2.15187] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 12/17/2021] [Accepted: 12/20/2021] [Indexed: 12/22/2022] Open
Abstract
Repeated activation of the beta 3 adrenergic receptor (β3AR) with the agonist CL 316,243 (CL) results in remodeling of white adipose tissue (WAT) characterized by increased mitochondrial enzymes and expression of uncoupling protein 1 (UCP1). β3AR activation also has profound acute metabolic effects including rapidly decreasing blood glucose, secondary to fatty acid-induced increases in insulin, and increasing energy expenditure. The acute (single dose) effects of β3AR activation have largely been examined in treatment naive animals and under room temperature housing conditions. The current study examined if repeated CL treatment would lead to an attenuation of acute metabolic effects of CL treatment under thermoneutral housing conditions and if this could be rescued with cilostamide, a phosphodiesterase inhibitor. We provide evidence demonstrating that the acute effects of CL to increase serum fatty acids and insulin and reduce blood glucose, but not increases in energy expenditure, are attenuated in mice following repeated treatment with CL. This occurs in parallel with reductions in indices of protein kinase A signaling in WAT including the phosphorylation of hormone sensitive lipase. The findings of attenuated serum fatty acid, insulin, and blood glucose responses were confirmed in both high-fat fed and UCP1-/- mice repeatedly treated with CL. Desensitization to CL in mice was rescued by cilostamide. Herein, we provide evidence that the glucose lowering, but not thermogenesis inducing, effects of CL are attenuated with repeated treatment and can be rescued by cilostamide. The findings of this study point toward novel adjunct treatment approaches that could be used to maximize therapeutic, glucose lowering effects of β3AR agonists.
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Affiliation(s)
- Kyle D. Medak
- Department of Human Health and Nutritional SciencesUniversity of GuelphGuelphOntarioCanada
| | - Greg L. McKie
- Department of Human Health and Nutritional SciencesUniversity of GuelphGuelphOntarioCanada
| | - Hesham Shamshoum
- Department of Human Health and Nutritional SciencesUniversity of GuelphGuelphOntarioCanada
| | - Ian Seguin
- Department of Human Health and Nutritional SciencesUniversity of GuelphGuelphOntarioCanada
| | - David C. Wright
- Department of Human Health and Nutritional SciencesUniversity of GuelphGuelphOntarioCanada
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5
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Knuth CM, Auger C, Chi L, Barayan D, Abdullahi A, Jeschke MG. Thermal Stress Induces Long-Term Remodeling of Adipose Tissue and Is Associated with Systemic Dysfunction. Shock 2021; 56:744-754. [PMID: 33534398 PMCID: PMC8316494 DOI: 10.1097/shk.0000000000001743] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
ABSTRACT Severe burns are characterized by the magnitude and duration of the hypermetabolic response thereafter, and demarcated by the loss of lean body mass and catabolism of fat stores. The aim of the present study was to delineate the temporal and location-specific physiological changes to adipose depots and downstream consequences post-burn in a murine model of thermal injury. C57BL/6 mice were subjected to a 30% total body surface area burn and body mass, food intake, and tissue mass were monitored for various time points up until 60 days postinjury. Mitochondrial respirometry was performed using a Seahorse XF96 analyzer. Lipolytic markers and browning markers were analyzed via Western blotting and histology. A severe burn results in a futile cycle of lipolysis and white adipose tissue (WAT) browning, the sequelae of which include fat catabolism, hepatomegaly, and loss of body mass despite increased food intake. A dynamic remodeling of epididymal WAT was observed with acute and chronic increases in lipolysis. Moreover, we demonstrate that pathological browning of inguinal WAT persists up to 60 days post-burn, highlighting the magnitude of the β-adrenergic response to thermal injury. Our data suggests that adipose depots have a heterogeneous response to burns and that therapeutic interventions targeting these physiological changes can improve outcomes. These data may also have implications for treating catabolic conditions such as cancer cachexia as well as developing treatments for obesity and type II diabetes.
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Affiliation(s)
- Carly M. Knuth
- Institute of Medical Science, University of Toronto, Canada
| | | | - Leon Chi
- Sunnybrook Research Institute, Toronto, Canada
| | - Dalia Barayan
- Institute of Medical Science, University of Toronto, Canada
| | | | - Marc G. Jeschke
- Institute of Medical Science, University of Toronto, Canada
- Department of Immunology, University of Toronto, Canada
- Sunnybrook Research Institute, Toronto, Canada
- Department of Surgery, Division of Plastic Surgery, University of Toronto, Canada
- Ross Tilley Burn Centre, Sunnybrook Health Sciences Centre, Toronto, Canada
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6
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Remodeling of Macrophages in White Adipose Tissue under the Conditions of Obesity as well as Lipolysis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:9980877. [PMID: 34504646 PMCID: PMC8423577 DOI: 10.1155/2021/9980877] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 07/23/2021] [Accepted: 08/06/2021] [Indexed: 11/20/2022]
Abstract
Adipose tissue macrophages (ATM) are a major source of low-grade inflammation in obesity, and yet reasons driving ATM accumulation in white adipose tissue (WAT) are not fully understood. Emerging evidence suggested that ATM underwent extensive remodeling in obesity. In addition to abundance, ATM in obesity were lipid-laden and metabolically reprogrammed, which in turn was tightly related to their functional alterations and persistence in obesity. Herein, we aimed to discuss that activation of lipid sensing signaling associated with metabolic reprogramming in ATM was indispensible for their migration, retention, or proliferation in obesity. Likewise, lipolysis also induced similar but transient ATM remodeling. Therefore, we assumed that obesity might share overlapping mechanisms with lipolysis in remodeling ATM. Formation of crown-like structures (CLS) in WAT was presumably a common event initiating ATM remodeling, with a spectrum of lipid metabolites released from adipocytes being potential signaling molecules. Moreover, adipose interlerkin-6 (IL-6) exhibited homologous alterations by obesity and lipolysis. Thus, we postulated a positive feedback loop between ATM and adipocytes via IL-6 signaling backing ATM persistence by comparison of ATM remodeling under obesity and lipolysis. An elucidation of ATM persistence could help to provide novel therapeutic targets for obesity-associated inflammation.
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7
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Lacerda DR, Soares DD, Costa KA, Nunes-Silva A, Rodrigues DF, Sabino JL, Silveira ALM, Pinho V, Vieira ÉLM, Menezes GB, Antunes MM, Teixeira MM, Ferreira AVM. Mechanisms underlying fat pad remodeling induced by fasting: role of PAF receptor. Nutrition 2020; 71:110616. [DOI: 10.1016/j.nut.2019.110616] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 08/24/2019] [Accepted: 10/05/2019] [Indexed: 01/09/2023]
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8
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Townsend LK, Wright DC. Looking on the "brite" side exercise-induced browning of white adipose tissue. Pflugers Arch 2019; 471:455-465. [PMID: 29982948 DOI: 10.1007/s00424-018-2177-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 06/26/2018] [Accepted: 06/27/2018] [Indexed: 12/17/2022]
Abstract
The need for effective and convenient ways of combatting obesity has created great interest in brown adipose tissue (BAT). However, because adult humans have relatively little amounts of BAT, the possibility of browning white adipose tissue (WAT), i.e., switching the metabolism of WAT from an energy storing to energy burning organ, has gained considerable attention. Exercise has countless health benefits, and has consistently been shown to cause browning in rodent white adipose tissue. The purpose of this review is to provide an overview of recent studies examining the effects of exercise and other interventions on the browning of white adipose tissue. The role of various endocrine factors, including catecholamines, interleukin-6, irisin, and meteorin-like in addition to local re-esterification-mediated mechanisms in inducing the browning of WAT will be discussed. The physiological importance of browning will be discussed, as will discrepancies in the literature between human and rodent studies.
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Affiliation(s)
- Logan K Townsend
- Department of Human Health and Nutritional Science, University of Guelph, 50 Stone Rd E, Guelph, Ontario, N1G 2W1, Canada
| | - David C Wright
- Department of Human Health and Nutritional Science, University of Guelph, 50 Stone Rd E, Guelph, Ontario, N1G 2W1, Canada.
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9
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Varghese M, Griffin C, McKernan K, Eter L, Lanzetta N, Agarwal D, Abrishami S, Singer K. Sex Differences in Inflammatory Responses to Adipose Tissue Lipolysis in Diet-Induced Obesity. Endocrinology 2019; 160:293-312. [PMID: 30544158 PMCID: PMC6330175 DOI: 10.1210/en.2018-00797] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 12/09/2018] [Indexed: 02/08/2023]
Abstract
Males are known to have profound adipose tissue macrophage (ATM) accumulation in gonadal white adipose tissue (GWAT) during obesity, whereas females are protected from such an inflammatory response even with increased adiposity. The inflammatory tone in males is linked to insulin resistance and might be the underlying cause for sex differences in metabolic disease. Factors regulating the meta-inflammatory response remain unclear but enhanced lipid storage in females may explain the reduced inflammatory response to high-fat diets. In this study, we evaluated lean and obese females with stimulated lipolysis to understand whether a stress release of free fatty acids (FFAs) could induce female ATMs. We demonstrate that in both lean and obese females, GWAT CD11c- resident ATMs accumulate with β-3 adrenergic receptor-stimulated lipolysis. Lipolysis elevated serum FFA, triglyceride, and IL-6 levels in females that corresponded to significant phosphorylated hormone-sensitive lipase and adipose triglyceride lipase protein expression in obese female GWAT compared with males. Increased lipolytic response in obese females was associated with crown-like structures and induced Il6, Mcp1, Arg1, and Mgl1 expression in obese female GWAT, suggesting an environment of lipid clearance and adipose remodeling. With this finding we next investigated whether lipid storage and lipolytic mediators differed by sex. Diacylglycerol, ceramides, phospholipids, and certain fatty acid species associated with inflammation were elevated in male GWAT compared with obese female GWAT. Overall, our data demonstrate a role for GWAT lipid storage and lipolytic metabolites to induce inflammation in males and induce remodeling in females that might explain sex differences in overall metabolic health.
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Affiliation(s)
- Mita Varghese
- Department of Pediatrics and Communicable Disease, University of Michigan Medical School, Ann Arbor, Michigan
| | - Cameron Griffin
- Department of Pediatrics and Communicable Disease, University of Michigan Medical School, Ann Arbor, Michigan
| | - Kaitlin McKernan
- Department of Pediatrics and Communicable Disease, University of Michigan Medical School, Ann Arbor, Michigan
| | - Leila Eter
- Department of Pediatrics and Communicable Disease, University of Michigan Medical School, Ann Arbor, Michigan
| | - Nicholas Lanzetta
- Department of Pediatrics and Communicable Disease, University of Michigan Medical School, Ann Arbor, Michigan
| | - Devyani Agarwal
- Department of Pediatrics and Communicable Disease, University of Michigan Medical School, Ann Arbor, Michigan
| | - Simin Abrishami
- Department of Pediatrics and Communicable Disease, University of Michigan Medical School, Ann Arbor, Michigan
| | - Kanakadurga Singer
- Department of Pediatrics and Communicable Disease, University of Michigan Medical School, Ann Arbor, Michigan
- Correspondence: Kanakadurga Singer, MD, Department of Pediatrics and Communicable Diseases, Division of Pediatric Endocrinology, D1205 MPB, 1500 East Medical Center Drive, Ann Arbor, Michigan 48109. E-mail:
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10
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Townsend LK, Medak KD, Knuth CM, Peppler WT, Charron MJ, Wright DC. Loss of glucagon signaling alters white adipose tissue browning. FASEB J 2019; 33:4824-4835. [PMID: 30615494 DOI: 10.1096/fj.201802048rr] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Various endocrine factors contribute to cold-induced white adipose tissue (WAT) browning, but glucagon has largely been ignored. The purpose of the current investigation was to determine if glucagon was required for the effects of cold on WAT browning. Utilizing whole-body glucagon receptor knockout (Gcgr-/-) mice and their wild-type (WT) littermate controls, we examined the response of inguinal WAT (iWAT) and interscapular brown adipose tissue (BAT) to an acute (48 h) cold stress or challenge with the β3-adrenergic agonist CL316,243. The effects of glucagon alone on the induction of thermogenic genes in adipose tissue from C57BL6/J mice were also examined. Gcgr-/- mice displayed modest increases in indices of browning at room temperature while displaying a blunted induction of Ucp1, Cidea, and Ffg21 mRNA expression in iWAT following cold exposure. Similarly, cold induced increases in mitochondrial DNA copy number, and the protein content of mitochondrial respiratory chain complexes, UCP1, and PGC1α were attenuated in iWAT from Gcgr-/- mice. In BAT, the induction of thermogenic markers following cold exposure was reduced, but the effect was less pronounced than in iWAT. Glucagon treatment increased the expression of thermogenic genes in both iWAT and BAT of C57BL6/J mice. In response to CL316,243, circulating fatty acids, glycerol, and the phosphorylation of hormone-sensitive lipase were attenuated in iWAT of Gcgr-/- mice. We provide evidence that glucagon is sufficient for the induction of thermogenic genes in iWAT, and the absence of intact glucagon signaling blunts the cold-induced browning of WAT, possibly due, in part, to impaired adrenergic signaling.-Townsend, L. K., Medak, K. D., Knuth, C. M., Peppler, W. T., Charron, M. J., Wright, D. C. Loss of glucagon signaling alters white adipose tissue browning.
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Affiliation(s)
- Logan K Townsend
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Kyle D Medak
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Carly M Knuth
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Willem T Peppler
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Maureen J Charron
- Department of Biochemistry, Albert Einstein College of Medicine, New York, New York, USA.,Department of Obstetrics and Gynecology and Women's Health, Albert Einstein College of Medicine, New York, New York, USA; and.,Division of Endocrinology and Diabetes, Department of Medicine, Albert Einstein College of Medicine, New York, New York, USA
| | - David C Wright
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
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11
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Evaluation of Glucose Uptake and Uncoupling Protein 1 Activity in Adipose Tissue of Diabetic Mice upon β-Adrenergic Stimulation. Mol Imaging Biol 2018; 21:249-256. [DOI: 10.1007/s11307-018-1251-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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12
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Babaei R, Schuster M, Meln I, Lerch S, Ghandour RA, Pisani DF, Bayindir-Buchhalter I, Marx J, Wu S, Schoiswohl G, Billeter AT, Krunic D, Mauer J, Lee YH, Granneman JG, Fischer L, Müller-Stich BP, Amri EZ, Kershaw EE, Heikenwälder M, Herzig S, Vegiopoulos A. Jak-TGFβ cross-talk links transient adipose tissue inflammation to beige adipogenesis. Sci Signal 2018; 11:11/527/eaai7838. [PMID: 29692363 DOI: 10.1126/scisignal.aai7838] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The transient activation of inflammatory networks is required for adipose tissue remodeling including the "browning" of white fat in response to stimuli such as β3-adrenergic receptor activation. In this process, white adipose tissue acquires thermogenic characteristics through the recruitment of so-called beige adipocytes. We investigated the downstream signaling pathways impinging on adipocyte progenitors that promote de novo formation of adipocytes. We showed that the Jak family of kinases controlled TGFβ signaling in the adipose tissue microenvironment through Stat3 and thereby adipogenic commitment, a function that was required for beige adipocyte differentiation of murine and human progenitors. Jak/Stat3 inhibited TGFβ signaling to the transcription factors Srf and Smad3 by repressing local Tgfb3 and Tgfb1 expression before the core transcriptional adipogenic cascade was activated. This pathway cross-talk was triggered in stromal cells by ATGL-dependent adipocyte lipolysis and a transient wave of IL-6 family cytokines at the onset of adipose tissue remodeling induced by β3-adrenergic receptor stimulation. Our results provide insight into the activation of adipocyte progenitors and are relevant for the therapeutic targeting of adipose tissue inflammatory pathways.
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Affiliation(s)
- Rohollah Babaei
- DKFZ Junior Group Metabolism and Stem Cell Plasticity (A171), German Cancer Research Center, Heidelberg 69120, Germany
| | - Maximilian Schuster
- DKFZ Junior Group Metabolism and Stem Cell Plasticity (A171), German Cancer Research Center, Heidelberg 69120, Germany
| | - Irina Meln
- DKFZ Junior Group Metabolism and Stem Cell Plasticity (A171), German Cancer Research Center, Heidelberg 69120, Germany
| | - Sarah Lerch
- DKFZ Junior Group Metabolism and Stem Cell Plasticity (A171), German Cancer Research Center, Heidelberg 69120, Germany
| | - Rayane A Ghandour
- Université Côte d'Azur, CNRS, Inserm, Institute of Biology Valrose, Nice 06100, France
| | - Didier F Pisani
- Université Côte d'Azur, CNRS, Inserm, Institute of Biology Valrose, Nice 06100, France
| | - Irem Bayindir-Buchhalter
- DKFZ Junior Group Metabolism and Stem Cell Plasticity (A171), German Cancer Research Center, Heidelberg 69120, Germany
| | - Julia Marx
- DKFZ Junior Group Metabolism and Stem Cell Plasticity (A171), German Cancer Research Center, Heidelberg 69120, Germany
| | - Shuang Wu
- DKFZ Junior Group Metabolism and Stem Cell Plasticity (A171), German Cancer Research Center, Heidelberg 69120, Germany.,Department of Toxicology, School of Public Health, Peking University, Beijing 100191, China
| | - Gabriele Schoiswohl
- Division of Endocrinology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Adrian T Billeter
- Department of General, Visceral, and Transplantation Surgery, University of Heidelberg, Heidelberg 69120, Germany
| | - Damir Krunic
- Light Microscopy Facility, German Cancer Research Center, Heidelberg 69120, Germany
| | - Jan Mauer
- Max Planck Institute for Metabolism Research Cologne, Cologne 50931, Germany
| | - Yun-Hee Lee
- College of Pharmacy, Yonsei University, Incheon 406-840, South Korea
| | - James G Granneman
- Center for Integrative Metabolic and Endocrine Research, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Lars Fischer
- Department of General, Visceral, and Transplantation Surgery, University of Heidelberg, Heidelberg 69120, Germany
| | - Beat P Müller-Stich
- Department of General, Visceral, and Transplantation Surgery, University of Heidelberg, Heidelberg 69120, Germany
| | - Ez-Zoubir Amri
- Université Côte d'Azur, CNRS, Inserm, Institute of Biology Valrose, Nice 06100, France
| | - Erin E Kershaw
- Division of Endocrinology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Mathias Heikenwälder
- Division of Chronic Inflammation and Cancer (F180), German Cancer Research Center, Heidelberg 69120, Germany
| | - Stephan Herzig
- Helmholtz Center Munich, Institute for Diabetes and Cancer (IDC), Neuherberg 85764, Germany. .,Joint Heidelberg-Institute for Diabetes and Cancer Translational Diabetes Program, Heidelberg University Hospital, Heidelberg 69120, Germany
| | - Alexandros Vegiopoulos
- DKFZ Junior Group Metabolism and Stem Cell Plasticity (A171), German Cancer Research Center, Heidelberg 69120, Germany.
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13
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Intermittent fasting promotes adipose thermogenesis and metabolic homeostasis via VEGF-mediated alternative activation of macrophage. Cell Res 2017; 27:1309-1326. [PMID: 29039412 PMCID: PMC5674160 DOI: 10.1038/cr.2017.126] [Citation(s) in RCA: 132] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 06/30/2017] [Accepted: 07/26/2017] [Indexed: 12/11/2022] Open
Abstract
Intermittent fasting (IF), a periodic energy restriction, has been shown to provide health benefits equivalent to prolonged fasting or caloric restriction. However, our understanding of the underlying mechanisms of IF-mediated metabolic benefits is limited. Here we show that isocaloric IF improves metabolic homeostasis against diet-induced obesity and metabolic dysfunction primarily through adipose thermogenesis in mice. IF-induced metabolic benefits require fasting-mediated increases of vascular endothelial growth factor (VEGF) expression in white adipose tissue (WAT). Furthermore, periodic adipose-VEGF overexpression could recapitulate the metabolic improvement of IF in non-fasted animals. Importantly, fasting and adipose-VEGF induce alternative activation of adipose macrophage, which is critical for thermogenesis. Human adipose gene analysis further revealed a positive correlation of adipose VEGF-M2 macrophage-WAT browning axis. The present study uncovers the molecular mechanism of IF-mediated metabolic benefit and suggests that isocaloric IF can be a preventive and therapeutic approach against obesity and metabolic disorders.
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14
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Peppler WT, Anderson ZG, MacRae LM, MacPherson RE, Wright DC. Habitual physical activity protects against lipopolysaccharide-induced inflammation in mouse adipose tissue. Adipocyte 2017; 6:1-11. [PMID: 28452590 PMCID: PMC5358709 DOI: 10.1080/21623945.2016.1259778] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 11/02/2016] [Accepted: 11/07/2016] [Indexed: 12/29/2022] Open
Abstract
Sepsis is a systemic inflammatory response to infection, with no preventative strategies. In this study, we identify a role for habitual physical activity in the prevention of adipose tissue inflammation induced by a model of sepsis, lipopolysaccharide (LPS). Male C57BL/6J mice (8 weeks old) were housed with access to voluntary wheel running (VWR) or sedentary (SED) for 10 weeks. Mice were then injected with LPS (2 mg/kg) or saline (SAL), and tissues were removed 6 hours post-injection. VWR attenuated body, epididymal adipose tissue (eWAT), and subcutaneous inguinal adipose tissue (iWAT) mass gain, improved glucose tolerance, increased markers of mitochondrial biogenesis in iWAT and eWAT, and increased UCP-1 protein content in iWAT. In iWAT, VWR attenuated the LPS induced increase in mRNA expression of TNF-α, MCP-1, and follistatin, along with phosphorylation of STAT3. In addition, VWR had a main effect for reducing iWAT mRNA expression of IL-1β, IL-6, and SOCS3. In eWAT, VWR had a main effect for reducing mRNA expression of IL-1β, MCP-1, IL-6, and follistatin. Further, VWR increased SOCS3 mRNA expression and phosphorylation of STAT3 in SAL mice, thus the relative change in response to LPS for these markers was attenuated. The protective effect of prior physical activity occurred in conjunction with increases in the protein content of a component of the LPS binding complex, MyD88. Overall, the results from this study demonstrate that habitual physical activity can attenuate the LPS induced inflammatory response in adipose tissue and this occurs to a greater extent in iWAT compare with eWAT.
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Affiliation(s)
- Willem T. Peppler
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada
| | - Zachary G. Anderson
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada
| | - Laura M. MacRae
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada
| | | | - David C. Wright
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada
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15
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[Letter to the Editor] Protein phosphorylation status is preserved following dual RNA and protein extraction using the Qiagen RNeasy Mini Kit. Biotechniques 2016; 61:233-235. [PMID: 27839508 DOI: 10.2144/000114471] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2016] [Accepted: 08/04/2016] [Indexed: 11/23/2022] Open
Abstract
Address correspondence to David M. Mutch, Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON N1G 2W1 Canada. E-mail: dmutch@uoguelph.ca.
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16
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Fu J, Zeng C, Zeng Z, Wang B, Wen X, Yu P, Gong D. Cinnamomum camphora Seed Kernel Oil Improves Lipid Metabolism and Enhances β3-Adrenergic Receptor Expression in Diet-Induced Obese Rats. Lipids 2016; 51:693-702. [DOI: 10.1007/s11745-016-4147-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 03/28/2016] [Indexed: 01/09/2023]
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17
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Peppler WT, Anderson ZG, Sutton CD, Rector RS, Wright DC. Voluntary wheel running attenuates lipopolysaccharide-induced liver inflammation in mice. Am J Physiol Regul Integr Comp Physiol 2016; 310:R934-42. [PMID: 26887432 DOI: 10.1152/ajpregu.00497.2015] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 02/10/2016] [Indexed: 12/11/2022]
Abstract
Sepsis induces an acute inflammatory response in the liver, which can lead to organ failure and death. Given the anti-inflammatory effects of exercise, we hypothesized that habitual physical activity could protect against acute sepsis-induced liver inflammation via mechanisms, including heat shock protein (HSP) 70/72. Male C57BL/6J mice (n = 80, ∼8 wk of age) engaged in physical activity via voluntary wheel running (VWR) or cage control (SED) for 10 wk. To induce sepsis, we injected (2 mg/kg ip) LPS or sterile saline (SAL), and liver was harvested 6 or 12 h later. VWR attenuated increases in body and epididymal adipose tissue mass, improved glucose tolerance, and increased liver protein content of PEPCK (P < 0.05). VWR attenuated increases in LPS-induced IL-6 signaling and mRNA expression of other inflammatory markers (TNF-α, chemokine C-C motif ligand 2, inducible nitric oxide synthase, IL-10, IL-1β) in the liver; however, this was not reflected at the whole body level, as systemic markers of inflammation were similar between SED and VWR. Insulin tolerance was greater in VWR compared with SED at 6 but not 12 h after LPS. The protective effect of VWR occurred in parallel with increases in the liver protein content of HSP70/72, a molecular chaperone that can protect against inflammatory challenges. This study provides novel evidence that physical activity protects against the inflammatory cascade induced by LPS in the liver and that these effects may be mediated via HSP70/72.
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Affiliation(s)
- Willem T Peppler
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Zachary G Anderson
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Charles D Sutton
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - R Scott Rector
- Departments of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri; and Department of Medicine, University of Missouri, Columbia, Missouri; and Research Service-Harry S. Truman Memorial VA Hospital, Columbia, Missouri
| | - David C Wright
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada,
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18
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Patsouris D, Qi P, Abdullahi A, Stanojcic M, Chen P, Parousis A, Amini-Nik S, Jeschke MG. Burn Induces Browning of the Subcutaneous White Adipose Tissue in Mice and Humans. Cell Rep 2015; 13:1538-44. [PMID: 26586436 PMCID: PMC4662886 DOI: 10.1016/j.celrep.2015.10.028] [Citation(s) in RCA: 133] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 09/09/2015] [Accepted: 10/08/2015] [Indexed: 01/22/2023] Open
Abstract
Burn is accompanied by long-lasting immunometabolic alterations referred to as hypermetabolism that are characterized by a considerable increase in resting energy expenditure and substantial whole-body catabolism. In burned patients, the length and magnitude of the hypermetabolic state is the highest of all patients and associated with profoundly increased morbidity and mortality. Unfortunately, the mechanisms involved in hypermetabolism are essentially unknown. We hypothesized that the adipose tissue plays a central role for the induction and persistence of hypermetabolism post-burn injury. Here, we show that burn induces a switch in the phenotype of the subcutaneous fat from white to beige, with associated characteristics such as increased mitochondrial mass and UCP1 expression. Our results further demonstrate the significant role of catecholamines and interleukin-6 in this process. We conclude that subcutaneous fat remodeling and browning represent an underlying mechanism that explains the elevated energy expenditure in burn-induced hypermetabolism.
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Affiliation(s)
- David Patsouris
- Department of Surgery, Division of Plastic Surgery, Department of Immunology, University of Toronto, Toronto, ON M5S 1A1, Canada
| | - Peter Qi
- Department of Surgery, Division of Plastic Surgery, Department of Immunology, University of Toronto, Toronto, ON M5S 1A1, Canada
| | - Abdikarim Abdullahi
- Department of Surgery, Division of Plastic Surgery, Department of Immunology, University of Toronto, Toronto, ON M5S 1A1, Canada
| | - Mile Stanojcic
- Department of Surgery, Division of Plastic Surgery, Department of Immunology, University of Toronto, Toronto, ON M5S 1A1, Canada
| | - Peter Chen
- Department of Surgery, Division of Plastic Surgery, Department of Immunology, University of Toronto, Toronto, ON M5S 1A1, Canada
| | - Alexandra Parousis
- Department of Surgery, Division of Plastic Surgery, Department of Immunology, University of Toronto, Toronto, ON M5S 1A1, Canada
| | - Saeid Amini-Nik
- Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada; Department of Surgery, Division of Plastic Surgery, Department of Immunology, University of Toronto, Toronto, ON M5S 1A1, Canada
| | - Marc G Jeschke
- Ross Tilley Burn Centre, Sunnybrook Health Sciences Centre, Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada; Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada; Department of Surgery, Division of Plastic Surgery, Department of Immunology, University of Toronto, Toronto, ON M5S 1A1, Canada.
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19
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Zhu L, Zhao L, Qu R, Zhu HY, Wang Y, Jiang X, Xu GY. Adrenergic stimulation sensitizes TRPV1 through upregulation of cystathionine β-synthetase in a rat model of visceral hypersensitivity. Sci Rep 2015; 5:16109. [PMID: 26527188 PMCID: PMC4630780 DOI: 10.1038/srep16109] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Accepted: 10/05/2015] [Indexed: 02/08/2023] Open
Abstract
The pathogenesis of pain in irritable bowel syndrome (IBS) is poorly understood and treatment remains difficult. The present study was designed to investigate roles of adrenergic signaling and the endogenous hydrogen sulfide producing enzyme cystathionine β-synthetase (CBS) in a previously validated rat model of IBS induced by neonatal colonic inflammation (NCI). Here we showed that NCI-induced visceral hypersensitivity (VH) was significantly attenuated by β2 subunit inhibitor but not by β1 or β3 or α subunit inhibitor. NCI markedly elevated plasma norepinephrine (NE) concentration without alteration in expression of β2 subunit receptors in dorsal root ganglion (DRGs) innervating the colon. In addition, NCI markedly enhanced TRPV1 and CBS expression in the colon DRGs. CBS inhibitor AOAA reversed the upregulation of TRPV1 in NCI rats. In vitro experiments showed that incubation of DRG cells with NE markedly enhanced expression of TRPV1, which was reversed by application of AOAA. Incubation of DRG cells with the H2S donor NaHS greatly enhanced TRPV1 expression. Collectively, these data suggest that activation of adrenergic signaling by NCI sensitizes TRPV1 channel activity, which is likely mediated by upregulation of CBS expression in peripheral sensory neurons, thus contributing to chronic visceral hypersensitivity.
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Affiliation(s)
- Liyan Zhu
- Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases, Department of Neurobiology and Physiology, Institute of Neuroscience, Soochow University, Suzhou 215123, P.R. China
| | - Liting Zhao
- Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases, Department of Neurobiology and Physiology, Institute of Neuroscience, Soochow University, Suzhou 215123, P.R. China
| | - Ruobing Qu
- Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases, Department of Neurobiology and Physiology, Institute of Neuroscience, Soochow University, Suzhou 215123, P.R. China
| | - Hong-Yan Zhu
- Center for Translational Medicine, the Affiliated Zhangjiagang Hospital of Soochow University, Zhangjiagang, 215600, P.R. China
| | - Yongmeng Wang
- Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases, Department of Neurobiology and Physiology, Institute of Neuroscience, Soochow University, Suzhou 215123, P.R. China
| | - Xinghong Jiang
- Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases, Department of Neurobiology and Physiology, Institute of Neuroscience, Soochow University, Suzhou 215123, P.R. China
| | - Guang-Yin Xu
- Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases, Department of Neurobiology and Physiology, Institute of Neuroscience, Soochow University, Suzhou 215123, P.R. China.,Center for Translational Medicine, the Affiliated Zhangjiagang Hospital of Soochow University, Zhangjiagang, 215600, P.R. China
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