1
|
Naren Q, Lindsund E, Bokhari MH, Pang W, Petrovic N. Differential responses to UCP1 ablation in classical brown versus beige fat, despite a parallel increase in sympathetic innervation. J Biol Chem 2024; 300:105760. [PMID: 38367663 PMCID: PMC10944106 DOI: 10.1016/j.jbc.2024.105760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 01/27/2024] [Accepted: 02/09/2024] [Indexed: 02/19/2024] Open
Abstract
In the cold, the absence of the mitochondrial uncoupling protein 1 (UCP1) results in hyper-recruitment of beige fat, but classical brown fat becomes atrophied. Here we examine possible mechanisms underlying this phenomenon. We confirm that in brown fat from UCP1-knockout (UCP1-KO) mice acclimated to the cold, the levels of mitochondrial respiratory chain proteins were diminished; however, in beige fat, the mitochondria seemed to be unaffected. The macrophages that accumulated massively not only in brown fat but also in beige fat of the UCP1-KO mice acclimated to cold did not express tyrosine hydroxylase, the norepinephrine transporter (NET) and monoamine oxidase-A (MAO-A). Consequently, they could not influence the tissues through the synthesis or degradation of norepinephrine. Unexpectedly, in the cold, both brown and beige adipocytes from UCP1-KO mice acquired an ability to express MAO-A. Adipose tissue norepinephrine was exclusively of sympathetic origin, and sympathetic innervation significantly increased in both tissues of UCP1-KO mice. Importantly, the magnitude of sympathetic innervation and the expression levels of genes induced by adrenergic stimulation were much higher in brown fat. Therefore, we conclude that no qualitative differences in innervation or macrophage character could explain the contrasting reactions of brown versus beige adipose tissues to UCP1-ablation. Instead, these contrasting responses may be explained by quantitative differences in sympathetic innervation: the beige adipose depot from the UCP1-KO mice responded to cold acclimation in a canonical manner and displayed enhanced recruitment, while the atrophy of brown fat lacking UCP1 may be seen as a consequence of supraphysiological adrenergic stimulation in this tissue.
Collapse
Affiliation(s)
- Qimuge Naren
- College of Animal Science and Technology, Northwest A&F University, Yangling, China; Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Erik Lindsund
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Muhammad Hamza Bokhari
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Weijun Pang
- College of Animal Science and Technology, Northwest A&F University, Yangling, China.
| | - Natasa Petrovic
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden.
| |
Collapse
|
2
|
Chen S, Fu Y, Wang T, Chen Z, Zhao P, Huang X, Qiao M, Li T, Song L. Effect of 2'-Fucosyllactose on Beige Adipocyte Formation in 3T3-L1 Adipocytes and C3H10T1/2 Cells. Foods 2023; 12:4137. [PMID: 38002194 PMCID: PMC10670332 DOI: 10.3390/foods12224137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 11/11/2023] [Accepted: 11/14/2023] [Indexed: 11/26/2023] Open
Abstract
2'-Fucosyllactose (2'-FL), the functional oligosaccharide naturally present in milk, has been shown to exert health benefits. This study was aimed to investigate the effect of 2'-fucosyllactose (2'-FL) on the browning of white adipose tissue in 3T3-L1 adipocytes and C3H10T1/2 cells. The results revealed that 2'-FL decreased lipid accumulations with reduced intracellular triglyceride contents in vitro. 2'-FL intervention increased the mitochondria density and the proportion of UCP1-positive cells. The mRNA expressions of the mitochondrial biogenesis-related and browning markers (Cox7a, Cyto C, Tfam, Ucp1, Pgc1α, Prdm16, Cidea, Elovl3, Pparα, CD137, and Tmem26) were increased after 2'-FL intervention to some extent. Similarly, the protein expression of the browning markers, including UCP1, PGC1α, and PRDM16, was up-regulated in the 2'-FL group. Additionally, an adenosine monophosphate-activated protein kinase (AMPK) inhibitor, compound C (1 μM), significantly decreased the induction of thermogenic proteins expressions mediated by 2'-FL, indicating that the 2'-FL-enhanced beige cell formation was partially dependent on the AMPK pathway. In conclusion, 2'-FL effectively promoted the browning of white adipose in vitro.
Collapse
Affiliation(s)
- Siru Chen
- Henan Engineering Technology Research Center of Food Processing and Circulation Safety Control, College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (S.C.); (Z.C.)
| | - Yankun Fu
- Henan Engineering Technology Research Center of Food Processing and Circulation Safety Control, College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (S.C.); (Z.C.)
| | - Tianlin Wang
- Henan Engineering Technology Research Center of Food Processing and Circulation Safety Control, College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (S.C.); (Z.C.)
| | - Zhenglin Chen
- Henan Engineering Technology Research Center of Food Processing and Circulation Safety Control, College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (S.C.); (Z.C.)
| | - Peijun Zhao
- Henan Engineering Technology Research Center of Food Processing and Circulation Safety Control, College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (S.C.); (Z.C.)
| | - Xianqing Huang
- Henan Engineering Technology Research Center of Food Processing and Circulation Safety Control, College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (S.C.); (Z.C.)
- Henan Technology Innovation Center of Meat Processing and Research, College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China
| | - Mingwu Qiao
- Henan Engineering Technology Research Center of Food Processing and Circulation Safety Control, College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (S.C.); (Z.C.)
- Henan Technology Innovation Center of Meat Processing and Research, College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China
| | - Tiange Li
- Henan Engineering Technology Research Center of Food Processing and Circulation Safety Control, College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (S.C.); (Z.C.)
| | - Lianjun Song
- Henan Engineering Technology Research Center of Food Processing and Circulation Safety Control, College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (S.C.); (Z.C.)
- Henan Technology Innovation Center of Meat Processing and Research, College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China
| |
Collapse
|
3
|
Nedergaard J, von Essen G, Cannon B. Brown adipose tissue: can it keep us slim? A discussion of the evidence for and against the existence of diet-induced thermogenesis in mice and men. Philos Trans R Soc Lond B Biol Sci 2023; 378:20220220. [PMID: 37661736 PMCID: PMC10475870 DOI: 10.1098/rstb.2022.0220] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 07/12/2023] [Indexed: 09/05/2023] Open
Abstract
The issue under discussion here is whether a decrease in the degree of UCP1 activity (and brown adipose tissue activity in general) could be a cause of obesity in humans. This possibility principally requires the existence of the phenomenon of diet-induced thermogenesis. Obesity could be a consequence of a reduced functionality of diet-induced thermogenesis. Experiments in mice indicate that diet-induced thermogenesis exists and is dependent on the presence of UCP1 and thus of brown adipose tissue activity. Accordingly, many (but not all) experiments indicate that in the absence of UCP1, mice become obese. Whether similar mechanisms exist in humans is still unknown. A series of studies have indicated a correlation between obesity and low brown adipose tissue activity, but it may be so that the obesity itself may influence the estimates of brown adipose tissue activity (generally glucose uptake), partly explaining the relationship. Estimates of brown adipose tissue catabolizing activity would seem to indicate that it may possess a capacity sufficient to help maintain body weight, and obesity would thus be aggravated in its absence. This article is part of a discussion meeting issue 'Causes of obesity: theories, conjectures and evidence (Part II)'.
Collapse
Affiliation(s)
- Jan Nedergaard
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Gabriella von Essen
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Barbara Cannon
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, SE-106 91 Stockholm, Sweden
| |
Collapse
|
4
|
Liu J, Lu W, Yan D, Guo J, Zhou L, Shi B, Su X. Mitochondrial respiratory complex I deficiency inhibits brown adipogenesis by limiting heme regulation of histone demethylation. Mitochondrion 2023; 72:22-32. [PMID: 37451354 DOI: 10.1016/j.mito.2023.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 06/13/2023] [Accepted: 07/11/2023] [Indexed: 07/18/2023]
Abstract
Mitochondrial functions play a crucial role in determining the metabolic and thermogenic status of brown adipocytes. Increasing evidence reveals that the mitochondrial oxidative phosphorylation (OXPHOS) system plays an important role in brown adipogenesis, but the mechanistic insights are limited. Herein, we explored the potential metabolic mechanisms leading to OXPHOS regulation of brown adipogenesis in pharmacological and genetic models of mitochondrial respiratory complex I deficiency. OXPHOS deficiency inhibits brown adipogenesis through disruption of the brown adipogenic transcription circuit without affecting ATP levels. Neither blockage of calcium signaling nor antioxidant treatment can rescue the suppressed brown adipogenesis. Metabolomics analysis revealed a decrease in levels of tricarboxylic acid cycle intermediates and heme. Heme supplementation specifically enhances respiratory complex I activity without affecting complex II and partially reverses the inhibited brown adipogenesis by OXPHOS deficiency. Moreover, the regulation of brown adipogenesis by the OXPHOS-heme axis may be due to the suppressed histone methylation status by increasing histone demethylation. In summary, our findings identified a heme-sensing retrograde signaling pathway that connects mitochondrial OXPHOS to the regulation of brown adipocyte differentiation and metabolic functions.
Collapse
Affiliation(s)
- Jingjing Liu
- Department of Biochemistry and Molecular Biology, Suzhou Medical College of Soochow University, Suzhou 215123, China
| | - Wen Lu
- Department of Endocrinology, The First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Dongyue Yan
- Department of Biochemistry and Molecular Biology, Suzhou Medical College of Soochow University, Suzhou 215123, China
| | - Junyuan Guo
- Department of Biochemistry and Molecular Biology, Suzhou Medical College of Soochow University, Suzhou 215123, China
| | - Li Zhou
- Department of Nutrition, The First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Bimin Shi
- Department of Endocrinology, The First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Xiong Su
- Department of Biochemistry and Molecular Biology, Suzhou Medical College of Soochow University, Suzhou 215123, China.
| |
Collapse
|
5
|
Omran F, Murphy AM, Younis AZ, Kyrou I, Vrbikova J, Hainer V, Sramkova P, Fried M, Ball G, Tripathi G, Kumar S, McTernan PG, Christian M. The impact of metabolic endotoxaemia on the browning process in human adipocytes. BMC Med 2023; 21:154. [PMID: 37076885 PMCID: PMC10116789 DOI: 10.1186/s12916-023-02857-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 04/03/2023] [Indexed: 04/21/2023] Open
Abstract
BACKGROUND Dysfunctional adipose tissue (AT) is known to contribute to the pathophysiology of metabolic disease, including type 2 diabetes mellitus (T2DM). This dysfunction may occur, in part, as a consequence of gut-derived endotoxaemia inducing changes in adipocyte mitochondrial function and reducing the proportion of BRITE (brown-in-white) adipocytes. Therefore, the present study investigated whether endotoxin (lipopolysaccharide; LPS) directly contributes to impaired human adipocyte mitochondrial function and browning in human adipocytes, and the relevant impact of obesity status pre and post bariatric surgery. METHODS Human differentiated abdominal subcutaneous (AbdSc) adipocytes from participants with obesity and normal-weight participants were treated with endotoxin to assess in vitro changes in mitochondrial function and BRITE phenotype. Ex vivo human AbdSc AT from different groups of participants (normal-weight, obesity, pre- and 6 months post-bariatric surgery) were assessed for similar analyses including circulating endotoxin levels. RESULTS Ex vivo AT analysis (lean & obese, weight loss post-bariatric surgery) identified that systemic endotoxin negatively correlated with BAT gene expression (p < 0.05). In vitro endotoxin treatment of AbdSc adipocytes (lean & obese) reduced mitochondrial dynamics (74.6% reduction; p < 0.0001), biogenesis (81.2% reduction; p < 0.0001) and the BRITE phenotype (93.8% reduction; p < 0.0001). Lean AbdSc adipocytes were more responsive to adrenergic signalling than obese AbdSc adipocytes; although endotoxin mitigated this response (92.6% reduction; p < 0.0001). CONCLUSIONS Taken together, these data suggest that systemic gut-derived endotoxaemia contributes to both individual adipocyte dysfunction and reduced browning capacity of the adipocyte cell population, exacerbating metabolic consequences. As bariatric surgery reduces endotoxin levels and is associated with improving adipocyte functionality, this may provide further evidence regarding the metabolic benefits of such surgical interventions.
Collapse
Affiliation(s)
- Farah Omran
- Division of Biomedical Sciences, Warwick Medical School, University of Warwick, Coventry, CV2 2DX, UK
| | - Alice M Murphy
- Department of Biosciences, School of Science and Technology, Nottingham Trent University, Nottingham, NG11 8NS, UK
| | - Awais Z Younis
- Department of Biosciences, School of Science and Technology, Nottingham Trent University, Nottingham, NG11 8NS, UK
| | - Ioannis Kyrou
- Warwickshire Institute for the Study of Diabetes, Endocrinology and Metabolism (WISDEM), University Hospitals Coventry and Warwickshire NHS Trust, Coventry, CV2 2DX, UK
- Centre for Sport, Exercise and Life Sciences, Research Institute for Health & Wellbeing, Coventry University, Coventry, CV1 5FB, UK
- Aston Medical School, College of Health and Life Sciences, Aston University, Birmingham, B4 7ET, UK
- Warwick Medical School, University of Warwick, Coventry, CV4 7AL, UK
| | | | | | | | | | - Graham Ball
- Medical Technology Research Centre, Anglia Ruskin University, Cambridge, UK
| | - Gyanendra Tripathi
- Human Sciences Research Centre, College of Life and Natural Sciences, University of Derby, Derby, DE22 1GB, UK
| | - Sudhesh Kumar
- Warwickshire Institute for the Study of Diabetes, Endocrinology and Metabolism (WISDEM), University Hospitals Coventry and Warwickshire NHS Trust, Coventry, CV2 2DX, UK
- Warwick Medical School, University of Warwick, Coventry, CV4 7AL, UK
| | - Philip G McTernan
- Department of Biosciences, School of Science and Technology, Nottingham Trent University, Nottingham, NG11 8NS, UK.
| | - Mark Christian
- Department of Biosciences, School of Science and Technology, Nottingham Trent University, Nottingham, NG11 8NS, UK.
| |
Collapse
|
6
|
Aldamarany W, Taocui H, Liling D, Wanfu Y, Zhong G. Oral Supplementation with Three Vegetable Oils Differing in Fatty Acid Composition Alleviates High-Fat Diet-Induced Obesity in Mice by Regulating Inflammation and Lipid Metabolism. POL J FOOD NUTR SCI 2023. [DOI: 10.31883/pjfns/160186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023] Open
|
7
|
Gan AM, Tracz-Gaszewska Z, Ellert-Miklaszewska A, Navrulin VO, Ntambi JM, Dobrzyn P. Stearoyl-CoA Desaturase Regulates Angiogenesis and Energy Metabolism in Ischemic Cardiomyocytes. Int J Mol Sci 2022; 23:ijms231810459. [PMID: 36142371 PMCID: PMC9499489 DOI: 10.3390/ijms231810459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 09/05/2022] [Accepted: 09/07/2022] [Indexed: 11/21/2022] Open
Abstract
New blood vessel formation is a key component of the cardiac repair process after myocardial infarction (MI). Hypoxia following MI is a major driver of angiogenesis in the myocardium. Hypoxia-inducible factor 1α (HIF1α) is the key regulator of proangiogenic signaling. The present study found that stearoyl-CoA desaturase (SCD) significantly contributed to the induction of angiogenesis in the hypoxic myocardium independently of HIF1α expression. The pharmacological inhibition of SCD activity in HL-1 cardiomyocytes and SCD knockout in an animal model disturbed the expression and secretion of proangiogenic factors including vascular endothelial growth factor-A, proinflammatory cytokines (interleukin-1β, interleukin-6, tumor necrosis factor α, monocyte chemoattractant protein-1, and Rantes), metalloproteinase-9, and platelet-derived growth factor in ischemic cardiomyocytes. These disturbances affected the proangiogenic potential of ischemic cardiomyocytes after SCD depletion. Together with the most abundant SCD1 isoform, the heart-specific SCD4 isoform emerged as an important regulator of new blood vessel formation in the murine post-MI myocardium. We also provide evidence that SCD shapes energy metabolism of the ischemic heart by maintaining the shift from fatty acids to glucose as the substrate that is used for adenosine triphosphate production. Furthermore, we propose that the regulation of the proangiogenic properties of hypoxic cardiomyocytes by key modulators of metabolic signaling such as adenosine monophosphate kinase, protein kinase B (AKT), and peroxisome-proliferator-activated receptor-γ coactivator 1α/peroxisome proliferator-activated receptor α depends on SCD to some extent. Thus, our results reveal a novel mechanism that links SCD to cardiac repair processes after MI.
Collapse
Affiliation(s)
- Ana-Maria Gan
- Laboratory of Molecular Medical Biochemistry, Nencki Institute of Experimental Biology of Polish Academy of Sciences, 02-093 Warsaw, Poland
| | - Zuzanna Tracz-Gaszewska
- Laboratory of Molecular Medical Biochemistry, Nencki Institute of Experimental Biology of Polish Academy of Sciences, 02-093 Warsaw, Poland
| | - Aleksandra Ellert-Miklaszewska
- Laboratory of Molecular Neurobiology, Nencki Institute of Experimental Biology of Polish Academy of Sciences, 02-093 Warsaw, Poland
| | - Viktor O. Navrulin
- Laboratory of Molecular Medical Biochemistry, Nencki Institute of Experimental Biology of Polish Academy of Sciences, 02-093 Warsaw, Poland
| | - James M. Ntambi
- Departments of Biochemistry and Nutritional Sciences, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Pawel Dobrzyn
- Laboratory of Molecular Medical Biochemistry, Nencki Institute of Experimental Biology of Polish Academy of Sciences, 02-093 Warsaw, Poland
- Correspondence:
| |
Collapse
|
8
|
Machado SA, Pasquarelli-do-Nascimento G, da Silva DS, Farias GR, de Oliveira Santos I, Baptista LB, Magalhães KG. Browning of the white adipose tissue regulation: new insights into nutritional and metabolic relevance in health and diseases. Nutr Metab (Lond) 2022; 19:61. [PMID: 36068578 PMCID: PMC9446768 DOI: 10.1186/s12986-022-00694-0] [Citation(s) in RCA: 52] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 08/19/2022] [Indexed: 12/11/2022] Open
Abstract
Adipose tissues are dynamic tissues that play crucial physiological roles in maintaining health and homeostasis. Although white adipose tissue and brown adipose tissue are currently considered key endocrine organs, they differ functionally and morphologically. The existence of the beige or brite adipocytes, cells displaying intermediary characteristics between white and brown adipocytes, illustrates the plastic nature of the adipose tissue. These cells are generated through white adipose tissue browning, a process associated with augmented non-shivering thermogenesis and metabolic capacity. This process involves the upregulation of the uncoupling protein 1, a molecule that uncouples the respiratory chain from Adenosine triphosphate synthesis, producing heat. β-3 adrenergic receptor system is one important mediator of white adipose tissue browning, during cold exposure. Surprisingly, hyperthermia may also induce beige activation and white adipose tissue beiging. Physical exercising copes with increased levels of specific molecules, including Beta-Aminoisobutyric acid, irisin, and Fibroblast growth factor 21 (FGF21), which induce adipose tissue browning. FGF21 is a stress-responsive hormone that interacts with beta-klotho. The central roles played by hormones in the browning process highlight the relevance of the individual lifestyle, including circadian rhythm and diet. Circadian rhythm involves the sleep-wake cycle and is regulated by melatonin, a hormone associated with UCP1 level upregulation. In contrast to the pro-inflammatory and adipose tissue disrupting effects of the western diet, specific food items, including capsaicin and n-3 polyunsaturated fatty acids, and dietary interventions such as calorie restriction and intermittent fasting, favor white adipose tissue browning and metabolic efficiency. The intestinal microbiome has also been pictured as a key factor in regulating white tissue browning, as it modulates bile acid levels, important molecules for the thermogenic program activation. During embryogenesis, in which adipose tissue formation is affected by Bone morphogenetic proteins that regulate gene expression, the stimuli herein discussed influence an orchestra of gene expression regulators, including a plethora of transcription factors, and chromatin remodeling enzymes, and non-coding RNAs. Considering the detrimental effects of adipose tissue browning and the disparities between adipose tissue characteristics in mice and humans, further efforts will benefit a better understanding of adipose tissue plasticity biology and its applicability to managing the overwhelming burden of several chronic diseases.
Collapse
Affiliation(s)
- Sabrina Azevedo Machado
- Laboratory of Immunology and Inflammation, Department of Cell Biology, University of Brasilia, Brasília, DF, Brazil
| | | | - Debora Santos da Silva
- Laboratory of Immunology and Inflammation, Department of Cell Biology, University of Brasilia, Brasília, DF, Brazil
| | - Gabriel Ribeiro Farias
- Laboratory of Immunology and Inflammation, Department of Cell Biology, University of Brasilia, Brasília, DF, Brazil
| | - Igor de Oliveira Santos
- Laboratory of Immunology and Inflammation, Department of Cell Biology, University of Brasilia, Brasília, DF, Brazil
| | - Luana Borges Baptista
- Laboratory of Immunology and Inflammation, Department of Cell Biology, University of Brasilia, Brasília, DF, Brazil
| | - Kelly Grace Magalhães
- Laboratory of Immunology and Inflammation, Department of Cell Biology, University of Brasilia, Brasília, DF, Brazil.
| |
Collapse
|
9
|
ChREBP-regulated lipogenesis is not required for the thermogenesis of brown adipose tissue. Int J Obes (Lond) 2022; 46:1068-1075. [PMID: 35152269 PMCID: PMC8853070 DOI: 10.1038/s41366-022-01082-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 01/20/2022] [Accepted: 01/21/2022] [Indexed: 11/08/2022]
Abstract
Objectives Brown adipose tissue (BAT) plays a critical role in energy expenditure by uncoupling protein 1 (UCP1)-mediated thermogenesis and represents an important therapeutic target for metabolic diseases. Carbohydrate response element-binding protein (ChREBP) is a key transcription factor regulating de novo lipogenesis, and its activity is associated with UCP1 expression and thermogenesis in BAT. However, the exact physiological role of endogenous ChREBP in BAT thermogenesis remains unclear. Methods We used the Cre/LoxP system to generate ChREBP BAT-specific knockout mice, and examined their BAT thermogenesis under acute cold exposure and long-term cold acclimation. Gene expression was analyzed at the mRNA and protein levels, and lipogenesis was examined by 3H-H2O incorporation assay. Results The mice lacking ChREBP specifically in BAT displayed a significant decrease in the expression levels of lipogenic genes and the activity of de novo lipogenesis in BAT after cold exposure, with UCP1 expression decreased under thermoneutral conditions or after acute cold exposure but not chronic cold acclimation. Unexpectedly, BAT-specific ChREBP deletion did not significantly affect body temperature as well as local temperature or morphology of BAT after acute cold exposure or chronic cold acclimation. Of note, ChREBP deletion mildly aggravated glucose intolerance induced by a high-fat diet. Conclusions Our work indicates that ChREBP regulates de novo lipogenesis in BAT and glucose tolerance, but is not required for non-shivering thermogenesis by BAT under acute or long-term cold exposure.
Collapse
|
10
|
Dieckmann S, Strohmeyer A, Willershäuser M, Maurer SF, Wurst W, Marschall S, de Angelis MH, Kühn R, Worthmann A, Fuh MM, Heeren J, Köhler N, Pauling JK, Klingenspor M. Susceptibility to diet-induced obesity at thermoneutral conditions is independent of UCP1. Am J Physiol Endocrinol Metab 2022; 322:E85-E100. [PMID: 34927460 DOI: 10.1152/ajpendo.00278.2021] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Activation of uncoupling protein 1 (UCP1) in brown adipose tissue (BAT) upon cold stimulation leads to substantial increase in energy expenditure to defend body temperature. Increases in energy expenditure after a high-caloric food intake, termed diet-induced thermogenesis, are also attributed to BAT. These properties render BAT a potential target to combat diet-induced obesity. However, studies investigating the role of UCP1 to protect against diet-induced obesity are controversial and rely on the phenotyping of a single constitutive UCP1-knockout model. To address this issue, we generated a novel UCP1-knockout model by Cre-mediated deletion of exon 2 in the UCP1 gene. We studied the effect of constitutive UCP1 knockout on metabolism and the development of diet-induced obesity. UCP1 knockout and wild-type mice were housed at 30°C and fed a control diet for 4 wk followed by 8 wk of high-fat diet. Body weight and food intake were monitored continuously over the course of the study, and indirect calorimetry was used to determine energy expenditure during both feeding periods. Based on Western blot analysis, thermal imaging and noradrenaline test, we confirmed the lack of functional UCP1 in knockout mice. However, body weight gain, food intake, and energy expenditure were not affected by loss of UCP1 function during both feeding periods. We introduce a novel UCP1-KO mouse enabling the generation of conditional UCP1-knockout mice to scrutinize the contribution of UCP1 to energy metabolism in different cell types or life stages. Our results demonstrate that UCP1 does not protect against diet-induced obesity at thermoneutrality.NEW & NOTEWORTHY We provide evidence that the abundance of UCP1 does not influence energy metabolism at thermoneutrality studying a novel Cre-mediated UCP1-KO mouse model. This model will be a foundation for a better understanding of the contribution of UCP1 in different cell types or life stages to energy metabolism.
Collapse
Affiliation(s)
- Sebastian Dieckmann
- Chair for Molecular Nutritional Medicine, TUM School of Life Sciences, Technical University of Munich, 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
| | - Akim Strohmeyer
- Chair for Molecular Nutritional Medicine, TUM School of Life Sciences, Technical University of Munich, 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
| | - Monja Willershäuser
- Chair for Molecular Nutritional Medicine, TUM School of Life Sciences, Technical University of Munich, 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
| | - Stefanie F Maurer
- Chair for Molecular Nutritional Medicine, TUM School of Life Sciences, Technical University of Munich, 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
| | - Wolfgang Wurst
- Institute of Developmental Genetics, Helmholtz Zentrum München, Germany
- TUM School of Life Sciences, Technical University of Munich, Freising, Germany
- German Center for Neurodegenerative Diseases (DZNE), Site Munich, Germany
| | - Susan Marschall
- Institute of Experimental Genetics, Helmholtz Zentrum München, Neuherberg, Germany
| | - Martin Hrabe de Angelis
- Institute of Experimental Genetics, Helmholtz Zentrum München, Neuherberg, Germany
- Chair of Experimental Genetics, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Ralf Kühn
- Institute of Developmental Genetics, Helmholtz Zentrum München, Germany
| | - Anna Worthmann
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Marceline M Fuh
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Joerg Heeren
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Nikolai Köhler
- LipiTUM, Chair of Experimental Bioinformatics, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - Josch K Pauling
- LipiTUM, Chair of Experimental Bioinformatics, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - Martin Klingenspor
- Chair for Molecular Nutritional Medicine, TUM School of Life Sciences, Technical University of Munich, 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
| |
Collapse
|
11
|
Qin B, Qincao L, He S, Liao Y, Shi J, Xie F, Diao N, Bai L. Parathyroid hormone-related protein prevents high-fat-diet-induced obesity, hepatic steatosis and insulin resistance in mice. Endocr J 2022; 69:55-65. [PMID: 34408100 DOI: 10.1507/endocrj.ej20-0728] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Obesity, closely related to systematic metabolic disorders, has become a major public health problem in recent decades. Here, we aimed to study the function of Parathyroid hormone-related protein (PTHrP) on high fat diet (HFD) induced murine obesity. Male C57BL/6J mice were transduced with adeno-associated virus vector encoding PTHrP (AAV-PTHrP) or adeno-associated virus control vector (AAV-Vehicle), following with HFD for 8 weeks. In addition, mice without transduction were fed on normal diet or HFD, respectively. Histological, metabolic and biochemical changes were detected. At the endpoint of experiment, body weight of mice treated with AAV-PTHrP did not increase as much as mice with AAV-Vehicle, but similar as mice with normal diet. Food efficiency ratio and weight of interscapular brown adipose tissue and epididymal white adipose tissue in mice overexpressed PTHrP were also lower than mice transducted with AAV-Vehicle. Besides, administration of AAV-PTHrP inhibited HFD-induced adipocyte hypertrophy. Protein level of PKA signaling pathway and thermogenic gene in adipose tissue exhibited a significant raise in HFD + AAV-PTHrP group, whereas transcription of inflammatory gene were decreased. Additionally, PTHrP overexpression ameliorated HFD-induced dyslipidemia, hepatic steatosis and insulin sensitivity. In HFD-induced murine obesity model, PTHrP is crucial to maintain metabolic homeostasis. PTHrP drives white adipose tissue browning and inhibits whitening of brown adipose tissue. Most importantly, PTHrP prevented HFD-induced obesity, hepatic steatosis and insulin resistance.
Collapse
Affiliation(s)
- Biyan Qin
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Litao Qincao
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Shuying He
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Yan Liao
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Jie Shi
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Fang Xie
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Na Diao
- Guangdong Provincial Key Laboratory of Colorectal Diseases, Department of Gastroenterology, the Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, 510655, China
| | - Lan Bai
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
| |
Collapse
|
12
|
Diao Z, Murakami M, Sato R, Shimokawa F, Matsumura M, Hashimoto O, Onda K, Shirai M, Matsui T, Funaba M. Identification and expression of bovine Ucp1 variants. Biochim Biophys Acta Mol Cell Biol Lipids 2022; 1867:159111. [DOI: 10.1016/j.bbalip.2022.159111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 01/05/2022] [Accepted: 01/12/2022] [Indexed: 10/19/2022]
|
13
|
Mishra BK, Madhu SV, Aslam M, Agarwal V, Banerjee BD. Adipose tissue expression of UCP1 and PRDM16 genes and their association with postprandial triglyceride metabolism and glucose intolerance. Diabetes Res Clin Pract 2021; 182:109115. [PMID: 34718051 DOI: 10.1016/j.diabres.2021.109115] [Citation(s) in RCA: 8] [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: 03/27/2021] [Revised: 08/28/2021] [Accepted: 10/15/2021] [Indexed: 12/01/2022]
Abstract
AIMS UCP1 and PRDM16 genes, primarily involved in browning of adipose tissue that can affect lipid metabolism are also associated with diabetes risk. Therefore, we planned to study the adipose tissue expression of UCP1 and PRDM 16 genes in subjects with glucose intolerance to find out its association with postprandial triglyceride (PPTg) measures and T2DM. METHODS A total of 30 subjects were recruited in three groups i.e., NGT, prediabetes and T2DM (NDDM + known T2DM) who were matched for age, sex and BMI. An 8-hour standardized fat challenge test was performed to study lipemic responses. UCP1 and PRDM16 genes quantification in adipose tissue was performed by real-time PCR followed by SDS PAGE. RESULTS UCP1 gene expression in SAT was significantly lower in T2DM and prediabetes as compared to NGT group while PRDM16 gene expression was significantly lower in T2DM group as compared to NGT group. UCP1 gene expression correlated with PPTg measures as well as with glycaemic measures while PRDM16 gene expression correlated with glycaemic measures only. CONCLUSION This study found downregulation of PRDM16 and UCP1 gene expression in SAT in subjects with glucose intolerance. The association of UCP1 gene expression with PPTg dysmetabolism may contribute to greater predisposition to T2DM.
Collapse
Affiliation(s)
- B K Mishra
- Department of Endocrinology, University College of Medical Sciences & GTB Hospital, University of Delhi, India
| | - S V Madhu
- Department of Endocrinology, University College of Medical Sciences & GTB Hospital, University of Delhi, India.
| | - M Aslam
- Department of Endocrinology, University College of Medical Sciences & GTB Hospital, University of Delhi, India
| | - V Agarwal
- Department of Surgery, University College of Medical Sciences & GTB Hospital, University of Delhi, India
| | - B D Banerjee
- Department of Biochemistry, University College of Medical Sciences & GTB Hospital, University of Delhi, India
| |
Collapse
|
14
|
César H, Sertorio MN, de Souza EA, Jamar G, Santamarina A, Jucá A, Casagrande BP, Pisani LP. Parental high-fat high-sugar diet programming and hypothalamus adipose tissue axis in male Wistar rats. Eur J Nutr 2021; 61:523-537. [PMID: 34657184 DOI: 10.1007/s00394-021-02690-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 09/28/2021] [Indexed: 01/04/2023]
Abstract
PURPOSE Maternal nutrition during early development and paternal nutrition pre-conception can programme offspring health status. Hypothalamus adipose axis is a target of developmental programming, and paternal and maternal high-fat, high-sugar diet (HFS) may be an important factor that predisposes offspring to develop obesity later in life. This study aims to investigate Wistar rats' maternal and paternal HFS differential contribution on the development, adiposity, and hypothalamic inflammation in male offspring from weaning until adulthood. METHODS Male progenitors were fed a control diet (CD) or HFS for 10 weeks before mating. After mating, dams were fed CD or HFS only during pregnancy and lactation. Forming the following male offspring groups: CD-maternal and paternal CD; MH-maternal HFS and paternal CD; PH-maternal CD and paternal HFS; PMH-maternal and paternal HFS. After weaning, male offspring were fed CD until adulthood. RESULTS Maternal HFS diet increased weight, visceral adiposity, and serum total cholesterol levels, and decreased hypothalamic weight in weanling male rats. In adult male offspring, maternal HFS increased weight, glucose levels, and hypothalamic NFκBp65. Paternal HFS diet lowered hypothalamic insulin receptor levels in weanling offspring and glucose and insulin levels in adult offspring. The combined effects of maternal and paternal HFS diets increased triacylglycerol, leptin levels, and hypothalamic inflammation in weanling rats, and increased visceral adiposity in adulthood. CONCLUSION Male offspring intake of CD diet after weaning reversed part of the effects of parental HFS diet during the perinatal period. However, maternal and paternal HFS diet affected adiposity and hypothalamic inflammation, which remained until adulthood.
Collapse
Affiliation(s)
- Helena César
- Programa de Pós-Graduação Interdisciplinar em Ciências da Saúde, Universidade Federal de São Paulo-UNIFESP, Santos, SP, Brazil
| | | | - Esther Alves de Souza
- Programa de Pós-Graduação em Nutrição, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Giovana Jamar
- Departamento de Biociências, Universidade Federal de São Paulo, Silva Jardim, 136. Laboratório 311, 3° andar, Vila Mathias, Santos, SP, 11015-020, Brazil
| | - Aline Santamarina
- Departamento de Biociências, Universidade Federal de São Paulo, Silva Jardim, 136. Laboratório 311, 3° andar, Vila Mathias, Santos, SP, 11015-020, Brazil
| | - Andrea Jucá
- Departamento de Biociências, Universidade Federal de São Paulo, Silva Jardim, 136. Laboratório 311, 3° andar, Vila Mathias, Santos, SP, 11015-020, Brazil
| | - Breno Picin Casagrande
- Departamento de Biociências, Universidade Federal de São Paulo, Silva Jardim, 136. Laboratório 311, 3° andar, Vila Mathias, Santos, SP, 11015-020, Brazil
| | - Luciana Pellegrini Pisani
- Departamento de Biociências, Universidade Federal de São Paulo, Silva Jardim, 136. Laboratório 311, 3° andar, Vila Mathias, Santos, SP, 11015-020, Brazil.
| |
Collapse
|
15
|
Transcriptome Profiles of the Liver in Two Cold-Exposed Sheep Breeds Revealed Different Mechanisms and Candidate Genes for Thermogenesis. Genet Res (Camb) 2021; 2021:5510297. [PMID: 36017327 PMCID: PMC9364924 DOI: 10.1155/2021/5510297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 07/29/2021] [Indexed: 11/23/2022] Open
Abstract
Cold-induced thermogenesis plays an important role in the survival of lambs exposed to
low air temperatures. The liver produces and mediates heat production in mammals; however,
to date, little is known about the role of liver genes in cold-induced thermogenesis in
lambs. In this study, the difference in the liver transcriptome between Altay and Hu ewe
lambs was compared. Because of different backgrounds of the two breeds, we hypothesized
that the transcriptome profiles of the liver would differ between breeds when exposed to
cold. Cold-exposed Altay lambs activated 8 candidate genes (ACTA1,
MYH1, MYH2, MYL1,
MYL2, TNNC1, TNNC2, and
TNNT3) involved in muscle shivering thermogenesis; 3 candidate genes
(ATP2A1, SLN, and CKM) involved in
muscle nonshivering thermogenesis related to the Ca2+ signal and creatine
cycle; and 6 candidate genes (PFKM, ALDOC,
PGAM2, ENO2, ENO3, and
ENO4) involved in enhancing liver metabolism. In contrast, the liver
may not act as the main tissue for thermogenesis in cold-exposed Hu lambs. We concluded
that Altay lambs rely on liver-mediated shivering and nonshivering thermogenesis by muscle
tissue to a greater extent than Hu lambs. Results from this study could provide a
theoretical foundation for the breeding and production of cold-resistant lambs.
Collapse
|
16
|
Mukherjee S, Yun JW. Novel regulatory roles of UCP1 in osteoblasts. Life Sci 2021; 276:119427. [PMID: 33785331 DOI: 10.1016/j.lfs.2021.119427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 03/17/2021] [Accepted: 03/22/2021] [Indexed: 11/28/2022]
Abstract
AIMS The bone-adipose axis requires complex homeostasis in energy and global metabolism. The bioenergetics of bone establishes the necessary energy balance to coordinate endocrine functions that are affected by various factors and is not limited to matrix proteins only. UCP1 is an uncoupling protein of adipocytes, commonly known for its unique feature of promoting thermogenesis, mainly in brown fat; however, the effects of UCP1 in other cell types remain unreported. MAIN METHODS In the current study, we determined the roles of UCP1 in osteoblasts by silencing the Ucp1 gene in MC-3T3-E1 cells, as well as C3H10T1/2 mesenchymal stem cells, and explored its functional activities. KEY FINDINGS Our results demonstrate for the first time the presence of UCP1 in osteoblast cells. We identified that UCP1 regulates ATP and oxidative phosphorylation in MC-3T3-E1 cells. In addition, our data reveal that the lack of Ucp1 results in reduced expressions of regulatory proteins involved in scavenging of ROS by enhancing an autophagic event to balance osteogenic differentiation. SIGNIFICANCE In conclusion, this study highlights a novel perspective on the importance of UCP1 in bone cells.
Collapse
Affiliation(s)
- Sulagna Mukherjee
- Department of Biotechnology, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea
| | - Jong Won Yun
- Department of Biotechnology, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea.
| |
Collapse
|
17
|
Harney DJ, Cielesh M, Chu R, Cooke KC, James DE, Stöckli J, Larance M. Proteomics analysis of adipose depots after intermittent fasting reveals visceral fat preservation mechanisms. Cell Rep 2021; 34:108804. [PMID: 33657384 DOI: 10.1016/j.celrep.2021.108804] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 01/22/2021] [Accepted: 02/05/2021] [Indexed: 12/21/2022] Open
Abstract
Intermittent fasting is a beneficial dietary treatment for obesity. But the response of each distinct adipose depot is currently poorly defined. Here we explore the response of key adipose depots to every-other-day fasting (EODF) in mice using proteomics. A key change in subcutaneous white adipose tissue (scWAT) and visceral WAT (vWAT) depots is an increase in mitochondrial protein content after EODF. This effect is correlated with increased fatty acid synthesis enzymes in both WAT depots but not in brown adipose tissue. Strikingly, EODF treatment downregulates lipolysis specifically in vWAT, mediated by a large decrease in the abundance of the catecholamine receptor (ADRB3). Together, these changes are important for preservation of the visceral lipid store during EODF. Enrichment analysis highlights downregulation of inflammatory collagen IV specifically in vWAT, allowing improved insulin sensitivity. This resource for adipose-depot-specific fasting adaptations in mice is available using a web-based interactive visualization.
Collapse
Affiliation(s)
- Dylan J Harney
- Charles Perkins Centre, School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW, Australia
| | - Michelle Cielesh
- Charles Perkins Centre, School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW, Australia
| | - Renee Chu
- Charles Perkins Centre, School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW, Australia
| | - Kristen C Cooke
- Charles Perkins Centre, School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW, Australia
| | - David E James
- Charles Perkins Centre, School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW, Australia; School of Medical Sciences, University of Sydney, Camperdown, NSW, Australia
| | - Jacqueline Stöckli
- Charles Perkins Centre, School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW, Australia
| | - Mark Larance
- Charles Perkins Centre, School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW, Australia.
| |
Collapse
|
18
|
Syahraya I, Novida H, Herawati L, Rejeki PS. Effect of High Fat Diet on Weight Loss Through the Expression of Uncouple Protein 1 in Mice Visceral Fat. FOLIA MEDICA INDONESIANA 2021. [DOI: 10.20473/fmi.v56i3.24576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Obesity has become an epidemic around the world. High fat diet (HFD) have been implemented as one of intervention to battle obesity. Uncouple protein 1 (UCP1) is one of the key factor on energy expenditure. The aim of this experiment is to see the macronutrients composition on weight loss and UCP1 expression in the visceral fat. Fifty male mice, 2-3 months old, 18-30 grams, were put in five different groups. K1 were fed (20% protein, 62.0% carbohydrate, 12% fat), K2 (60% protein, 0% carbohydrate, 30% fat), K3 (45% protein, 0% carbohydrate, 45% fat), K4 (30% protein, 0% carbohydrate, 60% fat), K5 (15% protein, 0% carbohydrate, 75% fat). The experiment was done in four weeks, mice body weight was measured every week. UCP1 expression seen using immunohistochemistry staining was measured at the end of the fourth week. Significant weight loss was achieved by K4 (-9.60±3.81) gram by the end of week four (p<0.05). K4 had the least amount of visceral fat. The result was that K4 achieved a significant visceral fat mass (0.02±0.06) gram compared to K1 (0.53±0.08) gram. Compared to other groups K5 expressed UCP1 more than the others (3.78±3.72) cphfp. HFD fed groups produced significant weight loss, group that had the greatest weight loss is K4. Meanwhile, each group had a variety of UCP1 expression.
Collapse
|
19
|
Zou Y, Wang YN, Ma H, He ZH, Tang Y, Guo L, Liu Y, Ding M, Qian SW, Tang QQ. SCD1 promotes lipid mobilization in subcutaneous white adipose tissue. J Lipid Res 2020; 61:1589-1604. [PMID: 32978274 PMCID: PMC7707166 DOI: 10.1194/jlr.ra120000869] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Beiging of white adipose tissue (WAT) has beneficial effects on metabolism. Although it is known that beige adipocytes are active in lipid catabolism and thermogenesis, how they are regulated deserves more explorations. In this study, we demonstrate that stearoyl-CoA desaturase 1 (SCD1) in subcutaneous WAT (scWAT) responded to cold stimulation and was able to promote mobilization of triacylglycerol [TAG (triglyceride)]. In vitro studies showed that SCD1 promoted lipolysis in C3H10T1/2 white adipocytes. The lipolytic effect was contributed by one of SCD1’s products, oleic acid (OA). OA upregulated adipose TAG lipase and hormone-sensitive lipase expression. When SCD1 was overexpressed in the scWAT of mice, lipolysis was enhanced, and oxygen consumption and heat generation were increased. These effects were also demonstrated by the SCD1 knockdown experiments in mice. In conclusion, our study suggests that SCD1, known as an enzyme for lipid synthesis, plays a role in upregulating lipid mobilization through its desaturation product, OA.
Collapse
Affiliation(s)
- Ying Zou
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Biochemistry and Molecular Biology of the School of Basic Medical Sciences, and Department of Endocrinology and Metabolism of Zhongshan Hospital, Fudan University, Shanghai Medical College, Shanghai, China
| | - Yi-Na Wang
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Biochemistry and Molecular Biology of the School of Basic Medical Sciences, and Department of Endocrinology and Metabolism of Zhongshan Hospital, Fudan University, Shanghai Medical College, Shanghai, China
| | - Hong Ma
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Zhi-Hui He
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Biochemistry and Molecular Biology of the School of Basic Medical Sciences, and Department of Endocrinology and Metabolism of Zhongshan Hospital, Fudan University, Shanghai Medical College, Shanghai, China
| | - Yan Tang
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Biochemistry and Molecular Biology of the School of Basic Medical Sciences, and Department of Endocrinology and Metabolism of Zhongshan Hospital, Fudan University, Shanghai Medical College, Shanghai, China
| | - Liang Guo
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Biochemistry and Molecular Biology of the School of Basic Medical Sciences, and Department of Endocrinology and Metabolism of Zhongshan Hospital, Fudan University, Shanghai Medical College, Shanghai, China
| | - Yang Liu
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Biochemistry and Molecular Biology of the School of Basic Medical Sciences, and Department of Endocrinology and Metabolism of Zhongshan Hospital, Fudan University, Shanghai Medical College, Shanghai, China
| | - Meng Ding
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Biochemistry and Molecular Biology of the School of Basic Medical Sciences, and Department of Endocrinology and Metabolism of Zhongshan Hospital, Fudan University, Shanghai Medical College, Shanghai, China
| | - Shu-Wen Qian
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Biochemistry and Molecular Biology of the School of Basic Medical Sciences, and Department of Endocrinology and Metabolism of Zhongshan Hospital, Fudan University, Shanghai Medical College, Shanghai, China.
| | - Qi-Qun Tang
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Biochemistry and Molecular Biology of the School of Basic Medical Sciences, and Department of Endocrinology and Metabolism of Zhongshan Hospital, Fudan University, Shanghai Medical College, Shanghai, China
| |
Collapse
|
20
|
Fischer AW, Behrens J, Sass F, Schlein C, Heine M, Pertzborn P, Scheja L, Heeren J. Brown adipose tissue lipoprotein and glucose disposal is not determined by thermogenesis in uncoupling protein 1-deficient mice. J Lipid Res 2020; 61:1377-1389. [PMID: 32769145 DOI: 10.1194/jlr.ra119000455] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Adaptive thermogenesis is highly dependent on uncoupling protein 1 (UCP1), a protein expressed by thermogenic adipocytes present in brown adipose tissue (BAT) and white adipose tissue (WAT). Thermogenic capacity of human and mouse BAT can be measured by positron emission tomography-computed tomography quantifying the uptake of 18F-fluodeoxyglucose or lipid tracers. BAT activation is typically studied in response to cold exposure or treatment with β-3-adrenergic receptor agonists such as CL316,243 (CL). Currently, it is unknown whether cold-stimulated uptake of glucose or lipid tracers is a good surrogate marker of UCP1-mediated thermogenesis. In metabolic studies using radiolabeled tracers, we found that glucose uptake is increased in mildly cold-activated BAT of Ucp1 -/- versus WT mice kept at subthermoneutral temperature. Conversely, lower glucose disposal was detected after full thermogenic activation achieved by sustained cold exposure or CL treatment. In contrast, uptake of lipoprotein-derived fatty acids into chronically activated thermogenic adipose tissues was substantially increased in UCP1-deficient mice. This effect is linked to higher sympathetic tone in adipose tissues of Ucp1 -/- mice, as indicated by elevated levels of thermogenic genes in BAT and WAT. Thus, glucose and lipoprotein handling does not necessarily reflect UCP1-dependent thermogenic activity, but especially lipid uptake rather mirrors sympathetic activation of adipose tissues.
Collapse
Affiliation(s)
- Alexander W Fischer
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Janina Behrens
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Frederike Sass
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Christian Schlein
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Markus Heine
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Paul Pertzborn
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ludger Scheja
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Joerg Heeren
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| |
Collapse
|
21
|
Kataoka N, Takeuchi T, Kusudo T, Li Y, Endo Y, Yamashita H. Lack of UCP1 stimulates fatty liver but mediates UCP1-independent action of beige fat to improve hyperlipidemia in Apoe knockout mice. Biochim Biophys Acta Mol Basis Dis 2020; 1866:165762. [PMID: 32179129 DOI: 10.1016/j.bbadis.2020.165762] [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: 11/14/2019] [Revised: 02/20/2020] [Accepted: 03/06/2020] [Indexed: 02/08/2023]
Abstract
Brown adipose tissue (BAT) plays a critical role in lipid metabolism and may protect from hyperlipidemia; however, its beneficial effect appears to depend on the ambient temperature of the environment. In this study, we investigated the effects of uncoupling protein 1 (UCP1) deficiency on lipid metabolism, including the pathophysiology of hyperlipidemia, in apolipoprotein E knockout (APOE-KO) mice at a normal (23 °C) and thermoneutral (30 °C) temperature. Unexpectedly, UCP1 deficiency caused improvements in hyperlipidemia, atherosclerosis, and glucose metabolism, regardless of an increase in hepatic lipid deposition, in Ucp1/Apoe double-knockout (DKO) mice fed a high-fat diet at 23 °C, with BAT hyperplasia and robust browning of inguinal white adipose tissue (IWAT) observed. Proteomics and gene expression analyses revealed significant increases in many proteins involved in energy metabolism and strong upregulation of brown/beige adipocyte-related genes and fatty acid metabolism-related genes in browned IWAT, suggesting an induction of beige fat formation and stimulation of lipid metabolism in DKO mice at 23 °C. Conversely, mRNA levels of fatty acid oxidation-related genes decreased in the liver of DKO mice. The favorable phenotypic changes were lost at 30 °C, with BAT whitening and disappearance of IWAT browning, while fatty liver further deteriorated in DKO mice compared with that in APOE-KO mice. Finally, longevity analysis revealed a significant lifespan extension of DKO mice compared with that of APOE-KO mice at 23 °C. Irrespective of the fundamental role of UCP1 thermogenesis, our results highlight the importance of beige fat for the improvement of hyperlipidemia and longevity under the atherogenic status at normal room temperature.
Collapse
Affiliation(s)
- Naoya Kataoka
- Department of Biomedical Sciences, College of Life and Health Sciences, Chubu University, Kasugai 487-8501, Japan; Department of Integrative Physiology, Nagoya University School of Medicine, Nagoya 466-8550, Japan
| | - Tamaki Takeuchi
- Department of Biomedical Sciences, College of Life and Health Sciences, Chubu University, Kasugai 487-8501, Japan
| | - Tatsuya Kusudo
- Department of Biomedical Sciences, College of Life and Health Sciences, Chubu University, Kasugai 487-8501, Japan; Faculty of Human Science, Tezukayama Gakuin University, Sakai 590-0113, Japan
| | - Yongxue Li
- Department of Biomedical Sciences, College of Life and Health Sciences, Chubu University, Kasugai 487-8501, Japan
| | - Yuki Endo
- Department of Biomedical Sciences, College of Life and Health Sciences, Chubu University, Kasugai 487-8501, Japan
| | - Hitoshi Yamashita
- Department of Biomedical Sciences, College of Life and Health Sciences, Chubu University, Kasugai 487-8501, Japan.
| |
Collapse
|
22
|
Zhang J, Yang J, Yang N, Ma J, Lu D, Dong Y, Liang H, Liu D, Cang M. Dlgap1 negatively regulates browning of white fat cells through effects on cell proliferation and apoptosis. Lipids Health Dis 2020; 19:39. [PMID: 32169116 PMCID: PMC7068870 DOI: 10.1186/s12944-020-01230-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 03/09/2020] [Indexed: 01/21/2023] Open
Abstract
Background Obesity is a metabolic imbalance characterized by excessive deposition of white fat. The browning of white fat can effectively treat obesity and related diseases. Although Dlgap1 (Discs, Large (Drosophila) Homolog-Associated Protein 1) is suspected to have an effect on this process, no empirical evidence is available. Methods To understand the role of Dlgap1, we cultured white and brown fat cells, then performed overexpression and knockout experiments. Results We found that Dlgap1 overexpression in brown adipocytes inhibits brown-fat-related gene expression, promotes white-fat-related genes, while also increasing brown-adipocyte proliferation and apoptosis. However, the gene overexpression has no effect on brown adipocyte maturation. Knocking out Dlgap1 in white fat cells promotes the expression and inhibition of brown-fat-related and white-fat-related genes, respectively. Additionally, the knockout inhibits white fat cell proliferation and apoptosis, while also promoting their maturation. Conclusions Dlgap1 negatively regulates the browning of white adipocytes by influencing cell proliferation and apoptosis.
Collapse
Affiliation(s)
- Ju Zhang
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010070, China.,College of Life Science, Inner Mongolia University, Hohhot, 010070, China
| | - Jie Yang
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010070, China.,College of Life Science, Inner Mongolia University, Hohhot, 010070, China
| | - Nan Yang
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010070, China.,College of Life Science, Inner Mongolia University, Hohhot, 010070, China
| | - Jianfei Ma
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010070, China.,College of Life Science, Inner Mongolia University, Hohhot, 010070, China
| | - Datong Lu
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010070, China.,College of Life Science, Inner Mongolia University, Hohhot, 010070, China
| | - Yanhua Dong
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010070, China.,College of Life Science, Inner Mongolia University, Hohhot, 010070, China
| | - Hao Liang
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010070, China.,College of Life Science, Inner Mongolia University, Hohhot, 010070, China
| | - Dongjun Liu
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010070, China.,College of Life Science, Inner Mongolia University, Hohhot, 010070, China
| | - Ming Cang
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010070, China. .,College of Life Science, Inner Mongolia University, Hohhot, 010070, China.
| |
Collapse
|
23
|
Maurer SF, Fromme T, Mocek S, Zimmermann A, Klingenspor M. Uncoupling protein 1 and the capacity for nonshivering thermogenesis are components of the glucose homeostatic system. Am J Physiol Endocrinol Metab 2020; 318:E198-E215. [PMID: 31714796 DOI: 10.1152/ajpendo.00121.2019] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Uncoupling protein 1 (Ucp1) provides nonshivering thermogenesis (NST) fueled by the dissipation of energy from macronutrients in brown and brite adipocytes. The availability of thermogenic fuels is facilitated by the uptake of extracellular glucose. This conjunction renders thermogenic adipocytes in brown and white adipose tissue (WAT) a potential target against obesity and glucose intolerance. We employed wild-type (WT) and Ucp1-ablated mice to elucidate this relationship. In three experiments of similar setup, Ucp1-ablated mice fed a high-fat diet (HFD) had either reduced or similar body mass gain, food intake, and metabolic efficiency compared with WT mice, challenging the hypothesized role of this protein in the development of diet-induced obesity. Despite the absence of increased body mass, oral glucose tolerance was robustly impaired in Ucp1-ablated mice in response to HFD. Postprandial glucose uptake was attenuated in brown adipose tissue but enhanced in subcutaneous WAT of Ucp1-ablated mice. These differences were explainable by expression of the insulin-responsive member 4 of the facilitated glucose transporter family and fully in line with the capacity for NST in these very tissues. Thus, the postprandial glucose uptake of adipose tissues serves as a surrogate measure for Ucp1-dependent and independent capacity for NST. Collectively, our findings corroborate Ucp1 as a modulator of adipose tissue glucose uptake and systemic glucose homeostasis but challenge its hypothesized causal effect on the development of obesity.
Collapse
Affiliation(s)
- Stefanie F Maurer
- Chair for Molecular Nutritional Medicine, Technical University of Munich, TUM School of Life Sciences, Freising, Germany
- Else Kröner-Fresenius Center for Nutritional Medicine, Technical University of Munich, Freising, Germany
| | - Tobias Fromme
- Chair for Molecular Nutritional Medicine, Technical University of Munich, TUM School of Life Sciences, Freising, Germany
- Else Kröner-Fresenius Center for Nutritional Medicine, Technical University of Munich, Freising, Germany
- ZIEL Institute for Food and Health, Technical University of Munich, Freising, Germany
| | - Sabine Mocek
- Chair for Molecular Nutritional Medicine, Technical University of Munich, TUM School of Life Sciences, Freising, Germany
| | - Anika Zimmermann
- Chair for Molecular Nutritional Medicine, Technical University of Munich, TUM School of Life Sciences, Freising, Germany
| | - Martin Klingenspor
- Chair for Molecular Nutritional Medicine, Technical University of Munich, TUM School of Life Sciences, Freising, Germany
- Else Kröner-Fresenius Center for Nutritional Medicine, Technical University of Munich, Freising, Germany
- ZIEL Institute for Food and Health, Technical University of Munich, Freising, Germany
| |
Collapse
|
24
|
Adipose lipidomics and RNA-Seq analysis revealed the enhanced mitochondrial function in UCP1 knock-in pigs. Biochim Biophys Acta Mol Cell Biol Lipids 2019; 1864:1375-1383. [PMID: 31271850 DOI: 10.1016/j.bbalip.2019.06.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 05/31/2019] [Accepted: 06/28/2019] [Indexed: 11/24/2022]
Abstract
Uncoupling protein 1 (UCP1) plays a key role in nonshivering thermogenesis and is involved in the pathogenesis of obesity. In a previous study, we generated adipocyte-specific UCP1 knock-in (UCP1-KI) pigs, which exhibited improved thermoregulatory ability and decreased fat deposition. To investigate whether UCP1 knock-in alters the lipid composition of adipose tissues, lipidomics of inguinal subcutaneous white adipose tissue (iWAT) and backfat from 6-month-old cold-treated UCP1-KI pigs and wild-type (WT) pigs were profiled. In addition, genome-wide RNA-sequencing of iWAT was performed to further study the genetic basis for lipid alterations. The results showed that iWAT and backfat from UCP1-KI pigs exhibited distinct lipidomic profiles, as the mild lipid alteration was observed in backfat of UCP1 knock-in pigs. Inguinal WAT from UCP1-KI pigs contained significantly decreased total triacylglycerol (p < 0.05), together with the downregulation of genes involved in fatty acid metabolism, suggesting the decreased lipogenesis in iWAT of UCP1-KI pigs. Significantly increased levels of total sphingolipids (p<0.05) were also observed in iWAT from UCP1-KI pigs. Notably, two mitochondrial-specific lipid species, cardiolipin CL72:8 (18:2) and CL74:9 (18:2), were found to be dramatically increased in iWAT from UCP1-KI pigs, suggesting enhanced mitochondrial function. This observation was further supported by the significant upregulation of numerous mitochondrial-related genes and significantly increased number of large mitochondria and mitochondrial cristae in iWAT of UCP1-KI pigs. Taken together, these data illustrate the specific role of UCP1 in lipid metabolism of fat tissues in pigs and provide new data for characterization of fat traits in UCP1-KI pigs.
Collapse
|
25
|
Ran L, Wang X, Mi A, Liu Y, Wu J, Wang H, Guo M, Sun J, Liu B, Li Y, Wang D, Jiang R, Wang N, Gao W, Zeng L, Huang L, Chen X, LeRoith D, Liang B, Li X, Wu Y. Loss of Adipose Growth Hormone Receptor in Mice Enhances Local Fatty Acid Trapping and Impairs Brown Adipose Tissue Thermogenesis. iScience 2019; 16:106-121. [PMID: 31154207 PMCID: PMC6545351 DOI: 10.1016/j.isci.2019.05.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 04/10/2019] [Accepted: 05/13/2019] [Indexed: 01/06/2023] Open
Abstract
Growth hormone (GH) binds to its receptor (growth hormone receptor [GHR]) to exert its pleiotropic effects on growth and metabolism. Disrupted GH/GHR actions not only fail growth but also are involved in many metabolic disorders, as shown in murine models with global or tissue-specific Ghr deficiency and clinical observations. Here we constructed an adipose-specific Ghr knockout mouse model Ad-GHRKO and studied the metabolic adaptability of the mice when stressed by high-fat diet (HFD) or cold. We found that disruption of adipose Ghr accelerated dietary obesity but protected the liver from ectopic adiposity through free fatty acid trapping. The heat-producing brown adipose tissue burning and white adipose tissue browning induced by cold were slowed in the absence of adipose Ghr but were recovered after prolonged cold acclimation. We conclude that at the expense of excessive subcutaneous fat accumulation and lower emergent cold tolerance, down-tuning adipose GHR signaling emulates a healthy obesity situation which has metabolic advantages against HFD. Adipose growth hormone receptor defect augments dietary obesity in mice Lack of adipose growth hormone receptor prevents ectopic adiposity Adipose growth hormone receptor defect benefits free fatty acid turnover Adipose growth hormone receptor facilitates thermogenic response to cold
Collapse
Affiliation(s)
- Liyuan Ran
- Institute for Genome Engineered Animal Models of Human Diseases, Dalian Medical University, Dalian 116044, China; National Center of Genetically Engineered Animal Models for International Research, Dalian Medical University, Dalian 116044, China; Liaoning Provence Key Lab of Genome Engineered Animal Models, Dalian Medical University, Dalian 116044, China
| | - Xiaoshuang Wang
- Institute for Genome Engineered Animal Models of Human Diseases, Dalian Medical University, Dalian 116044, China; National Center of Genetically Engineered Animal Models for International Research, Dalian Medical University, Dalian 116044, China; Liaoning Provence Key Lab of Genome Engineered Animal Models, Dalian Medical University, Dalian 116044, China
| | - Ai Mi
- Institute for Genome Engineered Animal Models of Human Diseases, Dalian Medical University, Dalian 116044, China; National Center of Genetically Engineered Animal Models for International Research, Dalian Medical University, Dalian 116044, China; Liaoning Provence Key Lab of Genome Engineered Animal Models, Dalian Medical University, Dalian 116044, China
| | - Yanshuang Liu
- Institute for Genome Engineered Animal Models of Human Diseases, Dalian Medical University, Dalian 116044, China; National Center of Genetically Engineered Animal Models for International Research, Dalian Medical University, Dalian 116044, China
| | - Jin Wu
- Institute for Genome Engineered Animal Models of Human Diseases, Dalian Medical University, Dalian 116044, China; National Center of Genetically Engineered Animal Models for International Research, Dalian Medical University, Dalian 116044, China; Liaoning Provence Key Lab of Genome Engineered Animal Models, Dalian Medical University, Dalian 116044, China
| | - Haoan Wang
- Institute for Genome Engineered Animal Models of Human Diseases, Dalian Medical University, Dalian 116044, China; National Center of Genetically Engineered Animal Models for International Research, Dalian Medical University, Dalian 116044, China; Liaoning Provence Key Lab of Genome Engineered Animal Models, Dalian Medical University, Dalian 116044, China
| | - Meihua Guo
- Institute for Genome Engineered Animal Models of Human Diseases, Dalian Medical University, Dalian 116044, China; National Center of Genetically Engineered Animal Models for International Research, Dalian Medical University, Dalian 116044, China; Liaoning Provence Key Lab of Genome Engineered Animal Models, Dalian Medical University, Dalian 116044, China
| | - Jie Sun
- Institute for Genome Engineered Animal Models of Human Diseases, Dalian Medical University, Dalian 116044, China; National Center of Genetically Engineered Animal Models for International Research, Dalian Medical University, Dalian 116044, China; Liaoning Provence Key Lab of Genome Engineered Animal Models, Dalian Medical University, Dalian 116044, China; College of Integrative Medicine, Dalian Medical University, Dalian 116044, China
| | - Bo Liu
- Institute for Genome Engineered Animal Models of Human Diseases, Dalian Medical University, Dalian 116044, China; National Center of Genetically Engineered Animal Models for International Research, Dalian Medical University, Dalian 116044, China; Liaoning Provence Key Lab of Genome Engineered Animal Models, Dalian Medical University, Dalian 116044, China
| | - Youwei Li
- Institute for Genome Engineered Animal Models of Human Diseases, Dalian Medical University, Dalian 116044, China; National Center of Genetically Engineered Animal Models for International Research, Dalian Medical University, Dalian 116044, China; Liaoning Provence Key Lab of Genome Engineered Animal Models, Dalian Medical University, Dalian 116044, China
| | - Dan Wang
- Institute for Genome Engineered Animal Models of Human Diseases, Dalian Medical University, Dalian 116044, China; National Center of Genetically Engineered Animal Models for International Research, Dalian Medical University, Dalian 116044, China; Liaoning Provence Key Lab of Genome Engineered Animal Models, Dalian Medical University, Dalian 116044, China
| | - Rujiao Jiang
- Institute for Genome Engineered Animal Models of Human Diseases, Dalian Medical University, Dalian 116044, China; National Center of Genetically Engineered Animal Models for International Research, Dalian Medical University, Dalian 116044, China; Liaoning Provence Key Lab of Genome Engineered Animal Models, Dalian Medical University, Dalian 116044, China
| | - Ning Wang
- Institute for Genome Engineered Animal Models of Human Diseases, Dalian Medical University, Dalian 116044, China; National Center of Genetically Engineered Animal Models for International Research, Dalian Medical University, Dalian 116044, China; Liaoning Provence Key Lab of Genome Engineered Animal Models, Dalian Medical University, Dalian 116044, China
| | - Wenting Gao
- Institute for Genome Engineered Animal Models of Human Diseases, Dalian Medical University, Dalian 116044, China; National Center of Genetically Engineered Animal Models for International Research, Dalian Medical University, Dalian 116044, China; Liaoning Provence Key Lab of Genome Engineered Animal Models, Dalian Medical University, Dalian 116044, China
| | - Li Zeng
- Institute for Genome Engineered Animal Models of Human Diseases, Dalian Medical University, Dalian 116044, China; National Center of Genetically Engineered Animal Models for International Research, Dalian Medical University, Dalian 116044, China
| | - Lin Huang
- Department of Pathophysiology, Dalian Medical University, Dalian 116044, China
| | - Xiaoli Chen
- Department of Food Science and Nutrition, University of Minnesota, Twin Cities, MN, USA
| | - Derek LeRoith
- Division of Endocrinology, Diabetes and Bone Disease, Department of Medicine, Icahn Mount Sinai School of Medicine, New York 10029, USA
| | - Bin Liang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Center for Excellence in Animal Evolution and Genetics, Chinese Academy of Sciences, Kunming 650223, China.
| | - Xin Li
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York 10010, USA; Department of Urology, New York University Langone Medical Center, New York 10016, USA; Perlmutter Cancer Institute, New York University Langone Medical Center, New York 10016, USA.
| | - Yingjie Wu
- Institute for Genome Engineered Animal Models of Human Diseases, Dalian Medical University, Dalian 116044, China; National Center of Genetically Engineered Animal Models for International Research, Dalian Medical University, Dalian 116044, China; Liaoning Provence Key Lab of Genome Engineered Animal Models, Dalian Medical University, Dalian 116044, China; College of Integrative Medicine, Dalian Medical University, Dalian 116044, China; Division of Endocrinology, Diabetes and Bone Disease, Department of Medicine, Icahn Mount Sinai School of Medicine, New York 10029, USA; Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York 10010, USA.
| |
Collapse
|
26
|
Bond LM, Burhans MS, Ntambi JM. Uncoupling protein-1 deficiency promotes brown adipose tissue inflammation and ER stress. PLoS One 2018; 13:e0205726. [PMID: 30427862 PMCID: PMC6235278 DOI: 10.1371/journal.pone.0205726] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Accepted: 10/01/2018] [Indexed: 02/06/2023] Open
Abstract
Inflammation and endoplasmic reticulum (ER) stress are hallmarks of metabolic syndrome. While these metabolic derangements have been well-investigated in white adipose tissue, their existence and etiology in brown adipose tissue (BAT) are poorly understood. Here, we aimed to investigate ER homeostasis and the inflammatory status and of BAT lacking uncoupling protein-1 (UCP1), a protein required for BAT thermogenesis. H&E staining illustrated lipid accumulation and crown-like structures surrounding adipocytes in BAT of UCP1-/- mice housed at room temperature compared to control mice. Further, immunohistological evaluation of F4/80 and gene expression studies demonstrated BAT macrophage infiltration and robust elevation of pro-inflammatory markers in UCP1-/- BAT. ER stress was also present in BAT of UCP1-/- mice, as evidenced by elevated gene expression and post-translational modifications of unfolded protein response components. After four weeks of thermoneutral housing, UCP1-/- mice did not exhibit elevated BAT inflammation and ER stress gene expression compared to WT mice, but depot expansion persisted. Collectively, we demonstrate that the effects of UCP1 deficiency in BAT are not restricted to mitochondrial uncoupling. We conclude that brown adipose tissue of UCP1-/- mice exhibits pro-inflammatory immune cell infiltration and perturbations in ER homeostasis and that this phenotype is driven by cold exposure rather than lipid accumulation.
Collapse
Affiliation(s)
- Laura M. Bond
- Department of Biochemistry, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
| | - Maggie S. Burhans
- Department of Nutritional Sciences, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
| | - James M. Ntambi
- Department of Biochemistry, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
- Department of Nutritional Sciences, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
| |
Collapse
|
27
|
Su X, Kong Y, Peng DQ. New insights into apolipoprotein A5 in controlling lipoprotein metabolism in obesity and the metabolic syndrome patients. Lipids Health Dis 2018; 17:174. [PMID: 30053818 PMCID: PMC6064078 DOI: 10.1186/s12944-018-0833-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Accepted: 07/20/2018] [Indexed: 01/01/2023] Open
Abstract
Apolipoprotein A5 (apoA5) has been identified to play an important role in lipid metabolism, specifically in triglyceride (TG) and TG-rich lipoproteins (TRLs) metabolism. Numerous evidence has demonstrated for an association between apoA5 and the increased risk of obesity and metabolic syndrome, but the mechanism remains to be fully elucidated. Recently, several studies verified that apoA5 could significantly reduce plasma TG level by stimulating lipoprotein lipase (LPL) activity, and the intracellular role of apoA5 has also been proved since apoA5 is associated with cytoplasmic lipid droplets (LDs) and affects intrahepatic TG accumulation. Furthermore, since adipocytes provide the largest storage depot for TG and play a crucial role in the development of obesity, we could infer that apoA5 also acts as a novel regulator to modulate TG storage in adipocytes. In this review, we focus on the association of gene and protein of apoA5 with obesity and metabolic syndrome, and provide new insights into the physiological role of apoA5 in humans, giving a potential therapeutic target for obesity and associated disorders.
Collapse
Affiliation(s)
- Xin Su
- Department of Cardiovascular Medicine, the Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Yi Kong
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, the Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Dao-Quan Peng
- Department of Cardiovascular Medicine, the Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China.
| |
Collapse
|
28
|
Sun L, Marin de Evsikova C, Bian K, Achille A, Telles E, Pei H, Seto E. Programming and Regulation of Metabolic Homeostasis by HDAC11. EBioMedicine 2018; 33:157-168. [PMID: 29958910 PMCID: PMC6085537 DOI: 10.1016/j.ebiom.2018.06.025] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 06/19/2018] [Accepted: 06/21/2018] [Indexed: 12/22/2022] Open
Abstract
Histone deacetylases (HDACs) are enzymes that regulate protein functions by catalyzing the removal of acetyl and acyl groups from lysine residues. They play pivotal roles in governing cell behaviors and are indispensable in numerous biological processes. HDAC11, the last identified and sole member of class IV HDACs, was reported over a decade ago. However, its physiological function remains poorly understood. Here, we report that HDAC11 knockout mice are resistant to high-fat diet-induced obesity and metabolic syndrome, suggesting that HDAC11 functions as a crucial metabolic regulator. Depletion of HDAC11 significantly enhanced insulin sensitivity and glucose tolerance, attenuated hypercholesterolemia, and decreased hepatosteatosis and liver damage. Mechanistically, HDAC11 deficiency boosts energy expenditure through promoting thermogenic capacity, which attributes to the elevation of uncoupling protein 1 (UCP1) expression and activity in brown adipose tissue. Moreover, loss of HDAC11 activates the adiponectin-AdipoR-AMPK pathway in the liver, which may contribute to a reversal in hepatosteatosis. Overall, our findings distinguish HDAC11 as a novel regulator of obesity, with potentially important implications for obesity-related disease treatment.
Collapse
Affiliation(s)
- Lei Sun
- George Washington University Cancer Center, USA; Department of Biochemistry & Molecular Medicine, George Washington University School of Medicine & Health Sciences, Washington, DC 20037, USA
| | | | - Ka Bian
- George Washington University Cancer Center, USA; Department of Biochemistry & Molecular Medicine, George Washington University School of Medicine & Health Sciences, Washington, DC 20037, USA
| | - Alexandra Achille
- Moffitt Cancer Center, University of South Florida, Tampa, FL 33612, USA
| | | | - Huadong Pei
- George Washington University Cancer Center, USA; Department of Biochemistry & Molecular Medicine, George Washington University School of Medicine & Health Sciences, Washington, DC 20037, USA
| | - Edward Seto
- George Washington University Cancer Center, USA; Department of Biochemistry & Molecular Medicine, George Washington University School of Medicine & Health Sciences, Washington, DC 20037, USA.
| |
Collapse
|