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Liu J, Chen Y. Cell-cell crosstalk between fat cells and immune cells. Am J Physiol Endocrinol Metab 2024; 327:E371-E383. [PMID: 39082899 DOI: 10.1152/ajpendo.00024.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 07/22/2024] [Accepted: 07/24/2024] [Indexed: 09/06/2024]
Abstract
Obesity is a metabolic disorder with pandemic-like implications, lacking viable pharmaceutical treatments currently. Thermogenic adipose tissues, including brown and beige adipose tissues, play an essential role in regulating systemic energy homeostasis and have emerged as appealing therapeutic targets for the treatment of obesity and obesity-related diseases. The function of adipocytes is subject to complex regulation by a cellular network of immune signaling pathways in response to environmental signals. However, the specific regulatory roles of immune cells in thermogenesis and relevant involving mechanisms are still not well understood. Here, we concentrate on our present knowledge of the interaction between thermogenic adipocytes and immune cells and present an overview of cellular and molecular mechanisms underlying immunometabolism in adipose tissues. We discuss cytokines, especially interleukins, which originate from widely variable sources, and their impacts on the development and function of thermogenic adipocytes. Moreover, we summarize the neuroimmune regulation in heat production and expand a new mode of intercellular communication mediated by mitochondrial transfer. The crosstalk between immune cells and adipocytes achieves adipose tissue homeostasis and systemic energy balance. A deep understanding of this intricate interaction would provide evidence for improving thermogenic efficiency by remodeling the immune microenvironment. Interventions based on these factors show a high potential to prevent adverse metabolic outcomes in patients with obesity.
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Affiliation(s)
- Jiadai Liu
- Department of Endocrinology, Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
- Laboratory of Endocrinology and Metabolism, Ministry of Education Key Laboratory of Vascular Aging, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Yong Chen
- Department of Endocrinology, Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
- Laboratory of Endocrinology and Metabolism, Ministry of Education Key Laboratory of Vascular Aging, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
- Branch of National Clinical Research Center for Metabolic Diseases, Wuhan, People's Republic of China
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Zhuang Z, Jia W, Wu L, Li Y, Lu Y, Xu M, Bai H, Bi Y, Wang Z, Chen S, Jiang Y, Chang G. Threonine Deficiency Increases Triglyceride Deposition in Primary Duck Hepatocytes by Reducing STAT3 Phosphorylation. Int J Mol Sci 2024; 25:8142. [PMID: 39125712 PMCID: PMC11312044 DOI: 10.3390/ijms25158142] [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: 06/02/2024] [Revised: 06/24/2024] [Accepted: 06/26/2024] [Indexed: 08/12/2024] Open
Abstract
Liver lipid metabolism disruption significantly contributes to excessive fat buildup in waterfowl. Research suggests that the supplementation of Threonine (Thr) in the diet can improve liver lipid metabolism disorder, while Thr deficiency can lead to such metabolic disorders in the liver. The mechanisms through which Thr regulates lipid metabolism remain unclear. STAT3 (signal transducer and activator of transcription 3), a crucial transcription factor in the JAK-STAT (Janus kinase-signal transducer and activator of transcription) pathway, participates in various biological processes, including lipid and energy metabolism. This research investigates the potential involvement of STAT3 in the increased lipid storage seen in primary duck hepatocytes as a result of a lack of Thr. Using small interfering RNA and Stattic, a specific STAT3 phosphorylation inhibitor, we explored the impact of STAT3 expression patterns on Thr-regulated lipid synthesis metabolism in hepatocytes. Through transcriptome sequencing, we uncovered pathways related to lipid synthesis and metabolism jointly regulated by Thr and STAT3. The results showed that Thr deficiency increases lipid deposition in primary duck hepatocytes (p < 0.01). The decrease in protein and phosphorylation levels of STAT3 directly caused this deposition (p < 0.01). Transcriptomic analysis revealed that Thr deficiency and STAT3 knockdown jointly altered the mRNA expression levels of pathways related to long-chain fatty acid synthesis and energy metabolism (p < 0.05). Thr deficiency, through mediating STAT3 inactivation, upregulated ELOVL7, PPARG, MMP1, MMP13, and TIMP4 mRNA levels, and downregulated PTGS2 mRNA levels (p < 0.01). In summary, these results suggest that Thr deficiency promotes lipid synthesis, reduces lipid breakdown, and leads to lipid metabolism disorders and triglyceride deposition by downregulating STAT3 activity in primary duck hepatocytes.
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Affiliation(s)
- Zhong Zhuang
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (Z.Z.); (W.J.); (L.W.); (Y.L.); (Y.L.); (M.X.); (Y.B.); (Z.W.); (S.C.); (G.C.)
| | - Wenqian Jia
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (Z.Z.); (W.J.); (L.W.); (Y.L.); (Y.L.); (M.X.); (Y.B.); (Z.W.); (S.C.); (G.C.)
| | - Lei Wu
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (Z.Z.); (W.J.); (L.W.); (Y.L.); (Y.L.); (M.X.); (Y.B.); (Z.W.); (S.C.); (G.C.)
| | - Yongpeng Li
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (Z.Z.); (W.J.); (L.W.); (Y.L.); (Y.L.); (M.X.); (Y.B.); (Z.W.); (S.C.); (G.C.)
| | - Yijia Lu
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (Z.Z.); (W.J.); (L.W.); (Y.L.); (Y.L.); (M.X.); (Y.B.); (Z.W.); (S.C.); (G.C.)
| | - Minghong Xu
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (Z.Z.); (W.J.); (L.W.); (Y.L.); (Y.L.); (M.X.); (Y.B.); (Z.W.); (S.C.); (G.C.)
| | - Hao Bai
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou 225009, China;
| | - Yulin Bi
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (Z.Z.); (W.J.); (L.W.); (Y.L.); (Y.L.); (M.X.); (Y.B.); (Z.W.); (S.C.); (G.C.)
| | - Zhixiu Wang
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (Z.Z.); (W.J.); (L.W.); (Y.L.); (Y.L.); (M.X.); (Y.B.); (Z.W.); (S.C.); (G.C.)
| | - Shihao Chen
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (Z.Z.); (W.J.); (L.W.); (Y.L.); (Y.L.); (M.X.); (Y.B.); (Z.W.); (S.C.); (G.C.)
| | - Yong Jiang
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (Z.Z.); (W.J.); (L.W.); (Y.L.); (Y.L.); (M.X.); (Y.B.); (Z.W.); (S.C.); (G.C.)
| | - Guobin Chang
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (Z.Z.); (W.J.); (L.W.); (Y.L.); (Y.L.); (M.X.); (Y.B.); (Z.W.); (S.C.); (G.C.)
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Fennel ZJ, Bourrant P, Kurian AS, Petrocelli JJ, de Hart NMMP, Yee EM, Boudina S, Keirstead HS, Nistor G, Greilach SA, Berchtold NC, Lane TE, Drummond MJ. Stem cell secretome treatment improves whole-body metabolism, reduces adiposity, and promotes skeletal muscle function in aged mice. Aging Cell 2024; 23:e14144. [PMID: 38500398 PMCID: PMC11296109 DOI: 10.1111/acel.14144] [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: 09/12/2023] [Revised: 02/09/2024] [Accepted: 03/03/2024] [Indexed: 03/20/2024] Open
Abstract
Aging coincides with the progressive loss of muscle mass and strength, increased adiposity, and diminished physical function. Accordingly, interventions aimed at improving muscle, metabolic, and/or physical health are of interest to mitigate the adverse effects of aging. In this study, we tested a stem cell secretome product, which contains extracellular vesicles and growth, cytoskeletal remodeling, and immunomodulatory factors. We examined the effects of 4 weeks of 2×/week unilateral intramuscular secretome injections (quadriceps) in ambulatory aged male C57BL/6 mice (22-24 months) compared to saline-injected aged-matched controls. Secretome delivery substantially increased whole-body lean mass and decreased fat mass, corresponding to higher myofiber cross-sectional area and smaller adipocyte size, respectively. Secretome-treated mice also had greater whole-body physical function (grip strength and rotarod performance) and had higher energy expenditure and physical activity levels compared to control mice. Furthermore, secretome-treated mice had greater skeletal muscle Pax7+ cell abundance, capillary density, collagen IV turnover, reduced intramuscular lipids, and greater Akt and hormone sensitive lipase phosphorylation in adipose tissue. Finally, secretome treatment in vitro directly enhanced muscle cell growth and IL-6 production, and in adipocytes, it reduced lipid content and improved insulin sensitivity. Moreover, indirect treatment with secretome-treated myotube culture media also enhanced muscle cell growth and adipocyte size reduction. Together, these data suggest that intramuscular treatment with a stem cell secretome improves whole-body metabolism, physical function, and remodels skeletal muscle and adipose tissue in aged mice.
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Affiliation(s)
- Zachary J. Fennel
- Department of Physical Therapy and Athletic TrainingUniversity of UtahSalt Lake CityUtahUSA
| | - Paul‐Emile Bourrant
- Division of Nutrition and Integrative PhysiologyUniversity of UtahSalt Lake CityUtahUSA
| | - Anu Susan Kurian
- Department of Physical Therapy and Athletic TrainingUniversity of UtahSalt Lake CityUtahUSA
| | - Jonathan J. Petrocelli
- Department of Physical Therapy and Athletic TrainingUniversity of UtahSalt Lake CityUtahUSA
| | | | - Elena M. Yee
- Division of Nutrition and Integrative PhysiologyUniversity of UtahSalt Lake CityUtahUSA
| | - Sihem Boudina
- Division of Nutrition and Integrative PhysiologyUniversity of UtahSalt Lake CityUtahUSA
| | | | | | | | | | - Thomas E. Lane
- Immunis, Inc.IrvineCaliforniaUSA
- Department of Neurobiology and BehaviorUniversity of CaliforniaIrvineCaliforniaUSA
| | - Micah J. Drummond
- Department of Physical Therapy and Athletic TrainingUniversity of UtahSalt Lake CityUtahUSA
- Division of Nutrition and Integrative PhysiologyUniversity of UtahSalt Lake CityUtahUSA
- Molecular Medicine ProgramUniversity of UtahSalt Lake CityUtahUSA
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Wang X, Gan M, Wang Y, Wang S, Lei Y, Wang K, Zhang X, Chen L, Zhao Y, Niu L, Zhang S, Zhu L, Shen L. Comprehensive review on lipid metabolism and RNA methylation: Biological mechanisms, perspectives and challenges. Int J Biol Macromol 2024; 270:132057. [PMID: 38710243 DOI: 10.1016/j.ijbiomac.2024.132057] [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: 03/03/2024] [Revised: 04/26/2024] [Accepted: 05/01/2024] [Indexed: 05/08/2024]
Abstract
Adipose tissue plays a crucial role in maintaining energy balance, regulating hormones, and promoting metabolic health. To address disorders related to obesity and develop effective therapies, it is essential to have a deep understanding of adipose tissue biology. In recent years, RNA methylation has emerged as a significant epigenetic modification involved in various cellular functions and metabolic pathways. Particularly in the realm of adipogenesis and lipid metabolism, extensive research is ongoing to uncover the mechanisms and functional importance of RNA methylation. Increasing evidence suggests that RNA methylation plays a regulatory role in adipocyte development, metabolism, and lipid utilization across different organs. This comprehensive review aims to provide an overview of common RNA methylation modifications, their occurrences, and regulatory mechanisms, focusing specifically on their intricate connections to fat metabolism. Additionally, we discuss the research methodologies used in studying RNA methylation and highlight relevant databases that can aid researchers in this rapidly advancing field.
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Affiliation(s)
- Xingyu Wang
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory of Livestock and Poultry Multi-omics, Ministry of Agriculture and Rural Affairs, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Mailin Gan
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory of Livestock and Poultry Multi-omics, Ministry of Agriculture and Rural Affairs, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Yan Wang
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory of Livestock and Poultry Multi-omics, Ministry of Agriculture and Rural Affairs, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Saihao Wang
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory of Livestock and Poultry Multi-omics, Ministry of Agriculture and Rural Affairs, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Yuhang Lei
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory of Livestock and Poultry Multi-omics, Ministry of Agriculture and Rural Affairs, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Kai Wang
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory of Livestock and Poultry Multi-omics, Ministry of Agriculture and Rural Affairs, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Xin Zhang
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory of Livestock and Poultry Multi-omics, Ministry of Agriculture and Rural Affairs, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Lei Chen
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory of Livestock and Poultry Multi-omics, Ministry of Agriculture and Rural Affairs, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Ye Zhao
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory of Livestock and Poultry Multi-omics, Ministry of Agriculture and Rural Affairs, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Lili Niu
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory of Livestock and Poultry Multi-omics, Ministry of Agriculture and Rural Affairs, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Shunhua Zhang
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory of Livestock and Poultry Multi-omics, Ministry of Agriculture and Rural Affairs, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Li Zhu
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory of Livestock and Poultry Multi-omics, Ministry of Agriculture and Rural Affairs, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China.
| | - Linyuan Shen
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory of Livestock and Poultry Multi-omics, Ministry of Agriculture and Rural Affairs, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China.
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Chen H, Sun L, Feng L, Han X, Zhang Y, Zhai W, Zhang Z, Mulholland M, Zhang W, Yin Y. Intermittent fasting promotes type 3 innate lymphoid cells secreting IL-22 contributing to the beigeing of white adipose tissue. eLife 2024; 12:RP91060. [PMID: 38536726 PMCID: PMC10972562 DOI: 10.7554/elife.91060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024] Open
Abstract
Mechanism underlying the metabolic benefit of intermittent fasting remains largely unknown. Here, we reported that intermittent fasting promoted interleukin-22 (IL-22) production by type 3 innate lymphoid cells (ILC3s) and subsequent beigeing of subcutaneous white adipose tissue. Adoptive transfer of intestinal ILC3s increased beigeing of white adipose tissue in diet-induced-obese mice. Exogenous IL-22 significantly increased the beigeing of subcutaneous white adipose tissue. Deficiency of IL-22 receptor (IL-22R) attenuated the beigeing induced by intermittent fasting. Single-cell sequencing of sorted intestinal immune cells revealed that intermittent fasting increased aryl hydrocarbon receptor signaling in ILC3s. Analysis of cell-cell ligand receptor interactions indicated that intermittent fasting may stimulate the interaction of ILC3s with dendritic cells and macrophages. These results establish the role of intestinal ILC3s in beigeing of white adipose tissue, suggesting that ILC3/IL-22/IL-22R axis contributes to the metabolic benefit of intermittent fasting.
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Affiliation(s)
- Hong Chen
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Center for Reproductive Medicine, Third Hospital, Peking UniversityBeijingChina
- State Key Laboratory of Female Fertility Promote, Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third HospitalBeijingChina
| | - Lijun Sun
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Center for Reproductive Medicine, Third Hospital, Peking UniversityBeijingChina
| | - Lu Feng
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Center for Reproductive Medicine, Third Hospital, Peking UniversityBeijingChina
| | - Xue Han
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Center for Reproductive Medicine, Third Hospital, Peking UniversityBeijingChina
| | - Yunhua Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Center for Reproductive Medicine, Third Hospital, Peking UniversityBeijingChina
| | - Wenbo Zhai
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Center for Reproductive Medicine, Third Hospital, Peking UniversityBeijingChina
| | - Zehe Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Center for Reproductive Medicine, Third Hospital, Peking UniversityBeijingChina
| | - Michael Mulholland
- Department of Surgery, University of Michigan Medical CenterAnn ArborUnited States
| | - Weizhen Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Center for Reproductive Medicine, Third Hospital, Peking UniversityBeijingChina
- Department of Surgery, University of Michigan Medical CenterAnn ArborUnited States
| | - Yue Yin
- Department of Pharmacology, School of Basic Medical Sciences, and Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking UniversityBeijingChina
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Esbjörnsson M, Norman B, Persson M, Saini A, Bülow J, Jansson E. Enhanced interleukin-6 in human adipose tissue vein after sprint exercise: Results from a pilot study. Clin Physiol Funct Imaging 2024; 44:171-178. [PMID: 37899535 DOI: 10.1111/cpf.12863] [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: 06/06/2023] [Revised: 10/25/2023] [Accepted: 10/27/2023] [Indexed: 10/31/2023]
Abstract
BACKGROUND Low-volume sprint exercise is likely to reduce body fat. Interleukin (IL-6) may mediate this by increasing adipose tissue (AT) lipolysis. Therefore, the exchange of AT IL-6 and glycerol, a marker of lipolysis, was examined in 10 healthy subjects performing three 30-s all-out sprints. METHODS Blood samples were obtained from brachial artery (a) and a superficial subcutaneous vein (v) on the anterior abdominal wall up to 9 min after the last sprint and analysed for IL-6 and glycerol. RESULTS Arterial IL-6 increased 2-fold from rest to last sprint. AT venous IL-6 increased 15-fold from 0.4 ± 0.4 at rest to 7.0 ± 4 pg × mL-1 (p < 0.0001) and AT v-a difference increased 45-fold from 0.12 ± 0.3 to 6.0 ± 5 pg x mL-1 (p < 0.0001) 9 min after last sprint. Arterial glycerol increased 2.5-fold from rest to 9 min postsprint 1 (p < 0.0001) and was maintained during the exercise period. AT venous and v-a difference of glycerol increased 2-fold from rest to 9 min postsprint 1 (p < 0.0001 and p = 0.01, respectively), decreased until 18 min postsprint 2 (p < 0.001 and p < 0.0001), and then increased again until 9 min after last sprint (both p < 0.01). CONCLUSIONS The concurrent increase in venous IL-6 and glycerol in AT after last sprint is consistent with an IL-6 induced lipolysis in AT. Glycerol data also indicated an initial increase in lipolysis after sprint 1 that was unrelated to IL-6. Increased IL-6 in adipose tissue may, therefore, complement other sprint exercise-induced lipolytic agents.
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Affiliation(s)
- Mona Esbjörnsson
- Department of Laboratory Medicine, Division of Clinical Physiology, Karolinska Institutet, Huddinge, Sweden
- Department of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden
| | - Barbara Norman
- Department of Laboratory Medicine, Division of Clinical Physiology, Karolinska Institutet, Huddinge, Sweden
| | - Moa Persson
- Department of Laboratory Medicine, Division of Clinical Physiology, Karolinska Institutet, Huddinge, Sweden
| | - Amarjit Saini
- Department of Laboratory Medicine, Division of Clinical Physiology, Karolinska Institutet, Huddinge, Sweden
| | - Jens Bülow
- Division of Clinical Physiology, Bispebjerg Hospital, Copenhagen, Denmark
| | - Eva Jansson
- Department of Laboratory Medicine, Division of Clinical Physiology, Karolinska Institutet, Huddinge, Sweden
- Department of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden
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Radványi Á, Röszer T. Interleukin-6: An Under-Appreciated Inducer of Thermogenic Adipocyte Differentiation. Int J Mol Sci 2024; 25:2810. [PMID: 38474057 DOI: 10.3390/ijms25052810] [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: 01/27/2024] [Revised: 02/23/2024] [Accepted: 02/26/2024] [Indexed: 03/14/2024] Open
Abstract
Adipose tissue inflammation is a key factor leading to obesity-associated immune disorders, such as insulin resistance, beta cell loss in the pancreatic islets, meta-inflammation, and autoimmunity. Inhibiting adipose tissue inflammation is considered a straightforward approach to abrogate these diseases. However, recent findings show that certain pro-inflammatory cytokines are essential for the proper differentiation and functioning of adipocytes. Lipolysis is stimulated, and the thermogenic competence of adipocytes is unlocked by interleukin-6 (IL-6), a cytokine that was initially recognized as a key trigger of adipose tissue inflammation. Coherently, signal transducer and activator of transcription 3 (STAT3), which is a signal transducer for IL-6, is necessary for thermogenic adipocyte development. Given the impact of thermogenic adipocytes in increasing energy expenditure and reducing body adiposity, functions of IL-6 in the adipose tissue have gained attention recently. In this review, we show that IL-6 signaling may protect from excess fat accumulation by stimulating thermogenesis in adipocytes.
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Affiliation(s)
- Ádám Radványi
- Department of Pediatrics, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary
| | - Tamás Röszer
- Department of Pediatrics, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary
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Yuan Y, Li K, Ye X, Wen S, Zhang Y, Teng F, Zhou X, Deng Y, Yang X, Wang W, Lin J, Luo S, Zhang P, Shi G, Zhang H. CLCF1 inhibits energy expenditure via suppressing brown fat thermogenesis. Proc Natl Acad Sci U S A 2024; 121:e2310711121. [PMID: 38190531 PMCID: PMC10801846 DOI: 10.1073/pnas.2310711121] [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: 07/05/2023] [Accepted: 11/17/2023] [Indexed: 01/10/2024] Open
Abstract
Brown adipose tissue (BAT) is the main site of nonshivering thermogenesis which plays an important role in thermogenesis and energy metabolism. However, the regulatory factors that inhibit BAT activity remain largely unknown. Here, cardiotrophin-like cytokine factor 1 (CLCF1) is identified as a negative regulator of thermogenesis in BAT. Adenovirus-mediated overexpression of CLCF1 in BAT greatly impairs the thermogenic capacity of BAT and reduces the metabolic rate. Consistently, BAT-specific ablation of CLCF1 enhances the BAT function and energy expenditure under both thermoneutral and cold conditions. Mechanistically, adenylate cyclase 3 (ADCY3) is identified as a downstream target of CLCF1 to mediate its role in regulating thermogenesis. Furthermore, CLCF1 is identified to negatively regulate the PERK-ATF4 signaling axis to modulate the transcriptional activity of ADCY3, which activates the PKA substrate phosphorylation. Moreover, CLCF1 deletion in BAT protects the mice against diet-induced obesity by promoting BAT activation and further attenuating impaired glucose and lipid metabolism. Therefore, our results reveal the essential role of CLCF1 in regulating BAT thermogenesis and suggest that inhibiting CLCF1 signaling might be a potential therapeutic strategy for improving obesity-related metabolic disorders.
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Affiliation(s)
- Youwen Yuan
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- Guangdong Provincial Key Laboratory of Shock and Microcirculation, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
| | - Kangli Li
- Department of Endocrinology, Translational Research of Diabetes Key Laboratory of Chongqing Education Commission of China, The Second Affiliated Hospital of Army Medical University, Chongqing400037, China
| | - Xueru Ye
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- Guangdong Provincial Key Laboratory of Shock and Microcirculation, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
| | - Shiyi Wen
- Department of Endocrinology and Metabolism, Medical Center for Comprehensive Weight Control, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou510630, China
- Guangdong Provincial Key Laboratory of Diabetology & Guangzhou Municipal Key Laboratory of Mechanistic and Translational Obesity Research, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou510630, China
| | - Yanan Zhang
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- Guangdong Provincial Key Laboratory of Shock and Microcirculation, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
| | - Fei Teng
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- Guangdong Provincial Key Laboratory of Shock and Microcirculation, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
| | - Xuan Zhou
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- Guangdong Provincial Key Laboratory of Shock and Microcirculation, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
| | - Yajuan Deng
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- Guangdong Provincial Key Laboratory of Shock and Microcirculation, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
| | - Xiaoyu Yang
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- Guangdong Provincial Key Laboratory of Shock and Microcirculation, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
| | - Weiwei Wang
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- Guangdong Provincial Key Laboratory of Shock and Microcirculation, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
| | - Jiayang Lin
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- Guangdong Provincial Key Laboratory of Shock and Microcirculation, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
| | - Shenjian Luo
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- Guangdong Provincial Key Laboratory of Shock and Microcirculation, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
| | - Peizhen Zhang
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- Guangdong Provincial Key Laboratory of Shock and Microcirculation, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
| | - Guojun Shi
- Department of Endocrinology and Metabolism, Medical Center for Comprehensive Weight Control, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou510630, China
- Guangdong Provincial Key Laboratory of Diabetology & Guangzhou Municipal Key Laboratory of Mechanistic and Translational Obesity Research, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou510630, China
| | - Huijie Zhang
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- Guangdong Provincial Key Laboratory of Shock and Microcirculation, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
- State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
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9
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Zhang W, Liu S, Kong L, Wu S, Zhong Z, Yu L, Yang Q, Zhang J, Li J, Zheng G. Lipopolysaccharide-induced persistent inflammation ameliorates fat accumulation by promoting adipose browning in vitro and in vivo. Int J Biol Macromol 2023; 252:126511. [PMID: 37625745 DOI: 10.1016/j.ijbiomac.2023.126511] [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: 04/13/2023] [Revised: 07/16/2023] [Accepted: 08/23/2023] [Indexed: 08/27/2023]
Abstract
This work aimed to explore whether the persistent inflammation induced by lipopolysaccharide (LPS) ameliorates fat accumulation by promoting adipose browning in vitro and in vivo. LPS over 1 ng/mL reduced lipid accumulation while increasing the expressions of specific genes involved in inflammation, mitochondrial biogenesis, and adipose browning in 3T3-L1 adipocytes. Moreover, LPS in intraperitoneal injection decreased white adipose tissue weight and elevated interscapular brown adipose tissue weight in mice. According to RT-PCR and western blot analysis results, the expressions of genes and proteins related to inflammation, mitochondrial biogenesis, lipolysis, and brown or beige markers in different tissues were elevated after LPS intervention. Cumulatively, LPS-induced persistent inflammation may potentially ameliorate fat accumulation by facilitating adipose browning in 3T3-L1 adipocytes and mice. These results offer new perspectives into the effect of persistent inflammation induced by LPS on regulating fat metabolism, thereby reducing fat accumulation by boosting adipose browning procedure.
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Affiliation(s)
- Wenkai Zhang
- Jiangxi Key Laboratory of Natural Product and Functional Food, College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Shanshan Liu
- Jiangxi Key Laboratory of Natural Product and Functional Food, College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Li Kong
- Jiangxi Key Laboratory of Natural Product and Functional Food, College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Shaofu Wu
- Jiangxi Key Laboratory of Natural Product and Functional Food, College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Zhen Zhong
- Jiangxi Key Laboratory of Natural Product and Functional Food, College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Longhui Yu
- Jiangxi Key Laboratory of Natural Product and Functional Food, College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Qinru Yang
- Jiangxi Key Laboratory of Natural Product and Functional Food, College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Jinfeng Zhang
- Jiangxi Key Laboratory of Natural Product and Functional Food, College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Jingen Li
- Jiangxi Key Laboratory of Natural Product and Functional Food, College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China.
| | - Guodong Zheng
- Jiangxi Key Laboratory of Natural Product and Functional Food, College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China.
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10
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Poursharifi P, Schmitt C, Chenier I, Leung YH, Oppong AK, Bai Y, Klein LL, Al-Mass A, Lussier R, Abu-Farha M, Abubaker J, Al-Mulla F, Peyot ML, Madiraju SRM, Prentki M. ABHD6 suppression promotes anti-inflammatory polarization of adipose tissue macrophages via 2-monoacylglycerol/PPAR signaling in obese mice. Mol Metab 2023; 78:101822. [PMID: 37838014 PMCID: PMC10622714 DOI: 10.1016/j.molmet.2023.101822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/25/2023] [Accepted: 10/08/2023] [Indexed: 10/16/2023] Open
Abstract
OBJECTIVE Pro-inflammatory polarization of adipose tissue macrophages (ATMs) plays a critical role in the pathogenesis of obesity-associated chronic inflammation. However, little is known about the role of lipids in the regulation of ATMs polarity and inflammation in response to metabolic stress. Deletion of α/β-hydrolase domain-containing 6 (ABHD6), a monoacylglycerol (MAG) hydrolase, has been shown to protect against diet-induced obesity and insulin resistance. METHODS Here we investigated the immunometabolic role of macrophage ABHD6 in response to nutrient excess using whole-body ABHD6-KO mice and human and murine macrophage cell-lines treated with KT203, a selective and potent pharmacological ABHD6 inhibitor. RESULTS KO mice on high-fat diet showed lower susceptibility to systemic diet-induced inflammation. Moreover, in the setting of overnutrition, stromal vascular cells from gonadal fat of KO vs. control mice contained lower number of M1 macrophages and exhibited enhanced levels of metabolically activated macrophages (MMe) and M2 markers, oxygen consumption, and interleukin-6 (IL-6) release. Likewise, under in vitro nutri-stress condition, inhibition of ABHD6 in MMe-polarized macrophages attenuated the expression and release of pro-inflammatory cytokines and M1 markers and induced the upregulation of lipid metabolism genes. ABHD6-inhibited MMe macrophages showed elevated levels of peroxisome proliferator-activated receptors (PPARs) and 2-MAG species. Notably, among different MAG species, only 2-MAG treatment led to increased levels of PPAR target genes in MMe macrophages. CONCLUSIONS Collectively, our findings identify ABHD6 as a key component of pro-inflammatory macrophage activation in response to excess nutrition and implicate an endogenous macrophage lipolysis/ABHD6/2-MAG/PPARs cascade, as a lipid signaling and immunometabolic pathway, which favors the anti-inflammatory polarization of ATMs in obesity.
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Affiliation(s)
- P Poursharifi
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada.
| | - C Schmitt
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada
| | - I Chenier
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada
| | - Y H Leung
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada
| | - A K Oppong
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada
| | - Y Bai
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada
| | - L-L Klein
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada
| | - A Al-Mass
- Department of Biological Sciences, Faculty of Science, Kuwait University, Kuwait City, Kuwait
| | - R Lussier
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada
| | - M Abu-Farha
- Dasman Diabetes Institute, Kuwait City, Kuwait
| | - J Abubaker
- Dasman Diabetes Institute, Kuwait City, Kuwait
| | - F Al-Mulla
- Dasman Diabetes Institute, Kuwait City, Kuwait
| | - M-L Peyot
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada
| | - S R M Madiraju
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada
| | - M Prentki
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada.
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11
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Cao R, Tian H, Zhang Y, Liu G, Xu H, Rao G, Tian Y, Fu X. Signaling pathways and intervention for therapy of type 2 diabetes mellitus. MedComm (Beijing) 2023; 4:e283. [PMID: 37303813 PMCID: PMC10248034 DOI: 10.1002/mco2.283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 04/18/2023] [Accepted: 04/27/2023] [Indexed: 06/13/2023] Open
Abstract
Type 2 diabetes mellitus (T2DM) represents one of the fastest growing epidemic metabolic disorders worldwide and is a strong contributor for a broad range of comorbidities, including vascular, visual, neurological, kidney, and liver diseases. Moreover, recent data suggest a mutual interplay between T2DM and Corona Virus Disease 2019 (COVID-19). T2DM is characterized by insulin resistance (IR) and pancreatic β cell dysfunction. Pioneering discoveries throughout the past few decades have established notable links between signaling pathways and T2DM pathogenesis and therapy. Importantly, a number of signaling pathways substantially control the advancement of core pathological changes in T2DM, including IR and β cell dysfunction, as well as additional pathogenic disturbances. Accordingly, an improved understanding of these signaling pathways sheds light on tractable targets and strategies for developing and repurposing critical therapies to treat T2DM and its complications. In this review, we provide a brief overview of the history of T2DM and signaling pathways, and offer a systematic update on the role and mechanism of key signaling pathways underlying the onset, development, and progression of T2DM. In this content, we also summarize current therapeutic drugs/agents associated with signaling pathways for the treatment of T2DM and its complications, and discuss some implications and directions to the future of this field.
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Affiliation(s)
- Rong Cao
- Department of Endocrinology and MetabolismState Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University and Collaborative Innovation Center of BiotherapyChengduSichuanChina
| | - Huimin Tian
- Department of Endocrinology and MetabolismState Key Laboratory of Biotherapy and Cancer CenterWest China Medical School, West China HospitalSichuan UniversityChengduSichuanChina
| | - Yu Zhang
- Department of Endocrinology and MetabolismState Key Laboratory of Biotherapy and Cancer CenterWest China Medical School, West China HospitalSichuan UniversityChengduSichuanChina
| | - Geng Liu
- Department of Endocrinology and MetabolismState Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University and Collaborative Innovation Center of BiotherapyChengduSichuanChina
| | - Haixia Xu
- Department of Endocrinology and MetabolismState Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University and Collaborative Innovation Center of BiotherapyChengduSichuanChina
| | - Guocheng Rao
- Department of Endocrinology and MetabolismState Key Laboratory of Biotherapy and Cancer CenterWest China Medical School, West China HospitalSichuan UniversityChengduSichuanChina
| | - Yan Tian
- Department of Endocrinology and MetabolismState Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University and Collaborative Innovation Center of BiotherapyChengduSichuanChina
| | - Xianghui Fu
- Department of Endocrinology and MetabolismState Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University and Collaborative Innovation Center of BiotherapyChengduSichuanChina
- Department of Endocrinology and MetabolismState Key Laboratory of Biotherapy and Cancer CenterWest China Medical School, West China HospitalSichuan UniversityChengduSichuanChina
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12
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Shams S, Amirinejad M, Amani-Shalamzari S, Rajabi H, Suzuki K. Swimming in cold water upregulates genes involved in thermogenesis and the browning of white adipose tissues. Comp Biochem Physiol B Biochem Mol Biol 2023; 265:110834. [PMID: 36740139 DOI: 10.1016/j.cbpb.2023.110834] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 01/14/2023] [Accepted: 02/01/2023] [Indexed: 02/05/2023]
Abstract
The purpose of this study was to investigate whether there is an interacting effect of six weeks of swimming in cold water on the gene expression of browning markers in adipose tissue in rodents. Twenty male Wistar rats were randomly divided into four groups: Control (C, 25 °C), Cold Exposure (CE, 4 °C), Swimming in tepid Water (STW, 30 °C), and Swimming in Cold Water (SCW, 15 °C). The swimming included 2-3 min intervals, 1 min rest, until exhaustion, three days a week for six weeks, with 3 to 6% of bodyweight overload. Rats from CE were exposed to cold for 2 h per day, five days per week. After the experimental protocol, interscapular brown (BAT) and inguinal subcutaneous white (WAT) fat tissues were excised, weighed, and processed for beiging and mitochondrial biogenesis markers gene expression. The experimental protocols resulted in an apparent increase in the number of brown adipocytes (per mm2) in the adipose deposits compared to the C group; substantial changes were observed in the SCW group. Compared to other groups, cold exposure alone increased significantly serum norepinephrine, and also β2-adrenergic receptor expression was upregulated in the adipocytes compared to the C group. The STW group increased the expression of peroxisome proliferator-activated receptor-γ (PPAR-γ) coactivator-1 alpha (PGC-1α), β2-adrenergic receptor, and CCAAT/enhancer-binding proteins-α(c/EBP-α) in WAT in comparison with the C group(p < 0.05). In both adipocytes, the SCW intervention significantly upregulated the expression of PGC-1α, PPAR-γ, and c/EBP-α genes in comparison with the C and CE groups. In addition, the expression of TFAM and UCP1 was upregulated substantially in the SCW group compared to other groups. Our data demonstrate that swim training and cold exposure present additive effects in the expression of genes involved in the beiging process and mitochondrial biogenesis markers in BAT and WAT. In addition, it seems that the upregulation of these genes is related to the activation of β2-adrenergic receptors.
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Affiliation(s)
- Sara Shams
- Department of Exercise Physiology, Faculty of Physical Education & Sports Science, Kharazmi University, Tehran, Iran
| | - Mahdi Amirinejad
- Department of Exercise Physiology, Faculty of Physical Education & Sports Science, Kharazmi University, Tehran, Iran
| | - Sadegh Amani-Shalamzari
- Department of Exercise Physiology, Faculty of Physical Education & Sports Science, Kharazmi University, Tehran, Iran.
| | - Hamid Rajabi
- Department of Exercise Physiology, Faculty of Physical Education & Sports Science, Kharazmi University, Tehran, Iran
| | - Katsuhiko Suzuki
- Faculty of Sport Sciences, Waseda University, Mikajima, Tokorozawa, Saitama, Japan.
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13
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Fang P, She Y, Yu M, Min W, Shang W, Zhang Z. Adipose-Muscle crosstalk in age-related metabolic disorders: The emerging roles of adipo-myokines. Ageing Res Rev 2023; 84:101829. [PMID: 36563906 DOI: 10.1016/j.arr.2022.101829] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/21/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022]
Abstract
Obesity and type 2 diabetes account for a considerable proportion of the global burden of age-related metabolic diseases. In age-related metabolic diseases, tissue crosstalk and metabolic regulation have been primarily linked to endocrine processes. Skeletal muscle and adipose tissue are endocrine organs that release myokines and adipokines into the bloodstream, respectively. These cytokines regulate metabolic responses in a variety of tissues, including skeletal muscle and adipose tissue. However, the intricate mechanisms underlying adipose-muscle crosstalk in age-related metabolic diseases are not fully understood. Recent exciting evidence suggests that myokines act to control adipose tissue functions, including lipolysis, browning, and inflammation, whereas adipokines mediate the beneficial actions of adipose tissue in the muscle, such as glucose uptake and metabolism. In this review, we assess the mechanisms of adipose-muscle crosstalk in age-related disorders and propose that the adipokines adiponectin and spexin, as well as the myokines irisin and interleukin-6 (IL-6), are crucial for maintaining the body's metabolic balance in age-related metabolic disorders. In addition, these changes of adipose-muscle crosstalk in response to exercise or dietary flavonoid consumption are part of the mechanisms of both functions in the remission of age-related metabolic disorders. A better understanding of the intricate relationships between adipose tissue and skeletal muscle could lead to more potent therapeutic approaches to prolong life and prevent age-related metabolic diseases.
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Affiliation(s)
- Penghua Fang
- Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Yuqing She
- Department of Endocrinology, Pukou Branch of Jiangsu People's Hospital, Nanjing 211899, China
| | - Mei Yu
- Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Wen Min
- Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Wenbin Shang
- Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Zhenwen Zhang
- Department of Endocrinology, Clinical Medical College, Yangzhou University, Yangzhou 225001, China.
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14
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Martins FF, Souza-Mello V, Aguila MB, Mandarim-de-Lacerda CA. Brown adipose tissue as an endocrine organ: updates on the emerging role of batokines. Horm Mol Biol Clin Investig 2022:hmbci-2022-0044. [DOI: 10.1515/hmbci-2022-0044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 09/20/2022] [Indexed: 11/15/2022]
Abstract
Abstract
Brown adipose tissue (BAT) remains active in adults, oxidizing fatty acids or glucose and releasing energy in the form of heat. Brown adipocytes and enhanced thermogenesis are targets for treating obesity and its comorbidities. BAT shows high synthesis activity and secretes several signaling molecules. The brown adipokines, or batokines, take action in an autocrine, paracrine, and endocrine manner. Batokines have a role in the homeostasis of the cardiovascular system, central nervous system, white adipose tissue, liver, and skeletal muscle and exert beneficial effects on BAT. The systemic function of batokines gives BAT an endocrine organ profile. Besides, the batokines Fibroblast Growth Factor-21, Vascular Endothelial Growth Factor A, Bone Morphogenetic Protein 8, Neuregulin 4, Myostatin, and Interleukin-6 emerge as targets to treat obesity and its comorbidities, deserving attention. This review outlines the role of six emerging batokines on BAT and their cross-talk with other organs, focusing on their physiological significance and diet-induced changes.
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Affiliation(s)
- Fabiane Ferreira Martins
- Laboratory of Morphometry, Metabolism, and Cardiovascular Diseases , Biomedical Center, Institute of Biology, The University of the State of Rio de Janeiro , Rio de Janeiro , Brazil
| | - Vanessa Souza-Mello
- Laboratory of Morphometry, Metabolism, and Cardiovascular Diseases , Biomedical Center, Institute of Biology, The University of the State of Rio de Janeiro , Rio de Janeiro , Brazil
| | - Marcia Barbosa Aguila
- Laboratory of Morphometry, Metabolism, and Cardiovascular Diseases , Biomedical Center, Institute of Biology, The University of the State of Rio de Janeiro , Rio de Janeiro , Brazil
| | - Carlos Alberto Mandarim-de-Lacerda
- Laboratory of Morphometry, Metabolism, and Cardiovascular Diseases , Biomedical Center, Institute of Biology, The University of the State of Rio de Janeiro , Rio de Janeiro , Brazil
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15
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Horino M, Ikeda K, Yamada T. The Role of Thermogenic Fat Tissue in Energy Consumption. Curr Issues Mol Biol 2022; 44:3166-3179. [PMID: 35877443 PMCID: PMC9317885 DOI: 10.3390/cimb44070219] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 07/07/2022] [Accepted: 07/08/2022] [Indexed: 12/19/2022] Open
Abstract
Mammalian adipose tissues are broadly divided into white adipose tissue (WAT) and thermogenic fat tissue (brown adipose tissue and beige adipose tissue). Uncoupling protein 1 (UCP1) is the central protein in thermogenesis, and cells that exhibit induced UCP1 expression and appear scattered throughout WAT are called beige adipocytes, and their induction in WAT is referred to as “beiging”. Beige adipocytes can differentiate from preadipocytes or convert from mature adipocytes. UCP1 was thought to contribute to non-shivering thermogenesis; however, recent studies demonstrated the presence of UCP1-independent thermogenic mechanisms. There is evidence that thermogenic fat tissue contributes to systemic energy expenditure even in human beings. This review discusses the roles that thermogenic fat tissue plays in energy consumption and offers insight into the possibility and challenges associated with its application in the treatment of obesity and type 2 diabetes.
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16
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Cheng X, Jiang J, Li C, Xue C, Kong B, Chang Y, Tang Q. The compound enzymatic hydrolysate of Neoporphyra haitanensis improved hyperglycemia and regulated the gut microbiome in high-fat diet-fed mice. Food Funct 2022; 13:6777-6791. [PMID: 35667104 DOI: 10.1039/d2fo00055e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We previously found that the combination of protease and a novel β-porphyranase Por16A_Wf may contribute to the deep-processing of laver. The purpose of the present study is to assess the hypoglycemic effect of the compound enzymatic hydrolysate (CEH) of Neoporphyra haitanensis. Thus, biochemical indexes related to diet-induced hyperglycemia were mainly detected using hematoxylin and eosin (H&E) staining, fluorescence quantitative PCR, and ultrahigh performance liquid chromatography-mass spectrometry (UPLC-MS). Then 16s rRNA gene sequencing was performed to analyze the effects of CEH on the gut microbiome in high-fat diet (HFD)-fed mice. The results suggested that CEH reduced the blood glucose level and alleviated insulin resistance. Possibly because CEH repressed intestinal α-glucosidase activity, inhibiting key enzymes (G6Pase and PEPCK) related to hepatic gluconeogenesis, and increased the expression of the enzyme (GLUT4) involved in peripheral glucose uptake. As potential indicators of hyperglycemia, total bile acids in the feces were reversed to the control levels after CEH intervention. Particularly, CEH decreased the content of tauro-α-muricholic acid (TαMCA) and ω-muricholic acid (ωMCA). Furthermore, CEH promoted the proliferation of beneficial bacteria (e.g. Parabacteroides), which may play a role in glycemic control. CEH also regulated the KEGG pathways associated with glycometabolism, such as "fructose and mannose metabolism". In summary, CEH supplementation has favorable effects on improving glucose metabolism and regulating the gut microbiome in HFD-fed mice. CEH has potential to be applied in the development of functional foods.
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Affiliation(s)
- Xiaojie Cheng
- College of Food Science and Engineering, Ocean University of China, Yushan Road, 5th, Qingdao, Shandong Province 266003, China.
| | - Jiali Jiang
- College of Food Science and Engineering, Ocean University of China, Yushan Road, 5th, Qingdao, Shandong Province 266003, China.
| | - Chunjun Li
- College of Food Science and Engineering, Ocean University of China, Yushan Road, 5th, Qingdao, Shandong Province 266003, China.
| | - Changhu Xue
- College of Food Science and Engineering, Ocean University of China, Yushan Road, 5th, Qingdao, Shandong Province 266003, China.
| | - Biao Kong
- College of Food Science and Engineering, Ocean University of China, Yushan Road, 5th, Qingdao, Shandong Province 266003, China.
| | - Yaoguang Chang
- College of Food Science and Engineering, Ocean University of China, Yushan Road, 5th, Qingdao, Shandong Province 266003, China.
| | - Qingjuan Tang
- College of Food Science and Engineering, Ocean University of China, Yushan Road, 5th, Qingdao, Shandong Province 266003, China.
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17
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Altınova AE. Beige Adipocyte as the Flame of White Adipose Tissue: Regulation of Browning and Impact of Obesity. J Clin Endocrinol Metab 2022; 107:e1778-e1788. [PMID: 34967396 DOI: 10.1210/clinem/dgab921] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Indexed: 11/19/2022]
Abstract
Beige adipocyte, the third and relatively new type of adipocyte, can emerge in white adipose tissue (WAT) under thermogenic stimulations that is termed as browning of WAT. Recent studies suggest that browning of WAT deserves more attention and therapies targeting browning of WAT can be helpful for reducing obesity. Beyond the major inducers of browning, namely cold and β 3-adrenergic stimulation, beige adipocytes are affected by several factors, and excess adiposity per se may also influence the browning process. The objective of the present review is to provide an overview of recent clinical and preclinical studies on the hormonal and nonhormonal factors that affect the browning of WAT. This review further focuses on the role of obesity per se on browning process.
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Affiliation(s)
- Alev Eroğlu Altınova
- Gazi University Faculty of Medicine, Department of Endocrinology and Metabolism, 06500 Ankara, Turkey
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Peng S, Zhang X, Yu L, Xu Y, Zhou Y, Qian S, Cao X, Ye X, Yang J, Jia W, Ye J. NF- κB regulates brown adipocyte function through suppression of ANT2. Acta Pharm Sin B 2022; 12:1186-1197. [PMID: 35530146 PMCID: PMC9069396 DOI: 10.1016/j.apsb.2021.10.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 10/05/2021] [Accepted: 10/20/2021] [Indexed: 12/01/2022] Open
Abstract
The transcription factor nuclear factor of kappa-light-chain-enhancer of activated B cells (NF-κB) is expressed in brown adipocytes, but its role remains largely unknown in the cells. This issue was addressed in current study by examining NF-κB in brown adipocytes in vitro and in vivo. NF-κB activity was increased by differentiation of brown adipocytes through elevation of p65 (RelA) expression. The transcriptional activity of NF-κB was induced by the cold stimulation with an elevation in S276 phosphorylation of p65 protein. Inactivation of NF-κB in brown adipocytes made the knockout mice [uncoupling protein 1 (Ucp1)–CreER–p65f/f, U-p65-KO] intolerant to the cold environment. The brown adipocytes exhibited an increase in apoptosis, a decrease in cristae density and uncoupling activity in the interscapular brown adipose tissue (iBAT) of p65-KO mice. The alterations became severer after cold exposure of the KO mice. The brown adipocytes of mice with NF-κB activation (p65 overexpression, p65-OE) exhibited a set of opposite alterations with a reduction in apoptosis, an increase in cristae density and uncoupling activity. In mechanism, NF-κB inhibited expression of the adenine nucleotide translocase 2 (ANT2) in the control of apoptosis. Data suggest that NF-κB activity is increased in brown adipocytes by differentiation and cold stimulation to protect the cells from apoptosis through down-regulation of ANT2 expression.
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Affiliation(s)
- Shiqiao Peng
- Shanghai Diabetes Institute, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Xiaoying Zhang
- Shanghai Diabetes Institute, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Lili Yu
- Department of Immunology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang 453003, China
| | - Yanhong Xu
- Neurology Department, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Yang Zhou
- National Demonstration Center for Experimental Fisheries Science Education, College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China
| | - Shengnan Qian
- Shanghai Diabetes Institute, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Xinyu Cao
- Shanghai Diabetes Institute, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Xiaotong Ye
- National Demonstration Center for Experimental Fisheries Science Education, College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China
| | - Jiajun Yang
- Neurology Department, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Weiping Jia
- Shanghai Diabetes Institute, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Jianping Ye
- Shanghai Diabetes Institute, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China.,Metabolic Disease Research Center, Zhengzhou University Affiliated Zhengzhou Central Hospital, Zhengzhou 450007, China.,Center for Advanced Medicine, College of Medicine, Zhengzhou University, Zhengzhou 450007, China
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Ohguro H, Ida Y, Hikage F, Umetsu A, Ichioka H, Watanabe M, Furuhashi M. STAT3 Is the Master Regulator for the Forming of 3D Spheroids of 3T3-L1 Preadipocytes. Cells 2022; 11:cells11020300. [PMID: 35053416 PMCID: PMC8774605 DOI: 10.3390/cells11020300] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 01/10/2022] [Accepted: 01/13/2022] [Indexed: 01/27/2023] Open
Abstract
To elucidate the currently unknown mechanisms responsible for the diverse biological aspects between two-dimensional (2D) and three-dimensional (3D) cultured 3T3-L1 preadipocytes, RNA-sequencing analyses were performed. During a 7-day culture period, 2D- and 3D-cultured 3T3-L1 cells were subjected to lipid staining by BODIPY, qPCR for adipogenesis related genes, including peroxisome proliferator-activated receptor γ (Pparγ), CCAAT/enhancer-binding protein alpha (Cebpa), Ap2 (fatty acid-binding protein 4; Fabp4), leptin, and AdipoQ (adiponectin), and RNA-sequencing analysis. Differentially expressed genes (DEGs) were detected by next-generation RNA sequencing (RNA-seq) and validated by a quantitative reverse transcription–polymerase chain reaction (qRT–PCR). Bioinformatic analyses were performed on DEGs using a Gene Ontology (GO) enrichment analysis and an Ingenuity Pathway Analysis (IPA). Significant spontaneous adipogenesis was observed in 3D 3T3-L1 spheroids, but not in 2D-cultured cells. The mRNA expression of Pparγ, Cebpa, and Ap2 among the five genes tested were significantly higher in 3D spheroids than in 2D-cultured cells, thus providing support for this conclusion. RNA analysis demonstrated that a total of 826 upregulated and 725 downregulated genes were identified as DEGs. GO enrichment analysis and IPA found 50 possible upstream regulators, and among these, 6 regulators—transforming growth factor β1 (TGFβ1), signal transducer and activator of transcription 3 (STAT3), interleukin 6 (IL6), angiotensinogen (AGT), FOS, and MYC—were, in fact, significantly upregulated. Further analyses of these regulators by causal networks of the top 14 predicted diseases and functions networks (IPA network score indicated more than 30), suggesting that STAT3 was the most critical upstream regulator. The findings presented herein suggest that STAT3 has a critical role in regulating the unique biological properties of 3D spheroids that are produced from 3T3-L1 preadipocytes.
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Affiliation(s)
- Hiroshi Ohguro
- Departments of Ophthalmology, School of Medicine, Sapporo Medical University, Sapporo 060-8556, Japan; (H.O.); (Y.I.); (F.H.); (A.U.); (H.I.); (M.W.)
| | - Yosuke Ida
- Departments of Ophthalmology, School of Medicine, Sapporo Medical University, Sapporo 060-8556, Japan; (H.O.); (Y.I.); (F.H.); (A.U.); (H.I.); (M.W.)
| | - Fumihito Hikage
- Departments of Ophthalmology, School of Medicine, Sapporo Medical University, Sapporo 060-8556, Japan; (H.O.); (Y.I.); (F.H.); (A.U.); (H.I.); (M.W.)
| | - Araya Umetsu
- Departments of Ophthalmology, School of Medicine, Sapporo Medical University, Sapporo 060-8556, Japan; (H.O.); (Y.I.); (F.H.); (A.U.); (H.I.); (M.W.)
| | - Hanae Ichioka
- Departments of Ophthalmology, School of Medicine, Sapporo Medical University, Sapporo 060-8556, Japan; (H.O.); (Y.I.); (F.H.); (A.U.); (H.I.); (M.W.)
| | - Megumi Watanabe
- Departments of Ophthalmology, School of Medicine, Sapporo Medical University, Sapporo 060-8556, Japan; (H.O.); (Y.I.); (F.H.); (A.U.); (H.I.); (M.W.)
| | - Masato Furuhashi
- Departments of Cardiovascular, Renal and Metabolic Medicine, School of Medicine, Sapporo Medical University, Sapporo 060-8556, Japan
- Correspondence: ; Tel.: +81-11-611-2111; Fax: +81-11-644-7958
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Exercise-Mediated Browning of White Adipose Tissue: Its Significance, Mechanism and Effectiveness. Int J Mol Sci 2021; 22:ijms222111512. [PMID: 34768943 PMCID: PMC8583930 DOI: 10.3390/ijms222111512] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 10/21/2021] [Accepted: 10/22/2021] [Indexed: 12/17/2022] Open
Abstract
As a metabolic organ, adipose tissue plays an important role in regulating metabolism. In adults, most adipose tissue is white adipose tissue (WAT), and excessive expansion of WAT will lead to obesity. It is worth noting that exercise can reduce the fat mass. There is also a lot of evidence that exercise can promote the browning of WAT, which is beneficial for metabolic homeostasis. Multiple factors, including reactive oxygen species (ROS), metabolites, nervous system, exerkines and lipolysis can facilitate exercise-mediated browning of WAT. In this review, the roles and the underlying mechanisms of exercise-mediated browning of WAT are summarized. The effects of different styles of exercise on the browning of WAT are also discussed, with the aim to propose better exercise strategies to enhance exercise-mediated browning of WAT, so as to promote metabolic health. Finally, the different reactivity of WAT at different anatomical sites to exercise-mediated browning is reviewed, which may provide potential suggestion for people with different fat loss needs.
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