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Benvie AM, Berry DC. Reversing Pdgfrβ signaling restores metabolically active beige adipocytes by alleviating ILC2 suppression in aged and obese mice. Mol Metab 2024; 89:102028. [PMID: 39278546 PMCID: PMC11458544 DOI: 10.1016/j.molmet.2024.102028] [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: 08/02/2024] [Revised: 09/02/2024] [Accepted: 09/07/2024] [Indexed: 09/18/2024] Open
Abstract
OBJECTIVE Platelet Derived Growth Factor Receptor Beta (Pdgfrβ) suppresses the formation of cold temperature-induced beige adipocytes in aged mammals. We aimed to determine if deleting Pdgfrβ in aged mice could rejuvenate metabolically active beige adipocytes by activating group 2 innate lymphoid cells (ILC2), and whether this effect could counteract diet-induced obesity-associated beige fat decline. METHODS We employed Pdgfrβ gain-of-function and loss-of-function mouse models targeting beige adipocyte progenitor cells (APCs). Our approach included cold exposure, metabolic cage analysis, and age and diet-induced obesity models to examine beige fat development and metabolic function under varied Pdgfrβ activity. RESULTS Acute cold exposure alone enhanced metabolic benefits in aged mice, irrespective of beige fat generation. However, Pdgfrβ deletion in aged mice reestablished the formation of metabolically functional beige adipocytes, enhancing metabolism. Conversely, constitutive Pdgfrβ activation in young mice stymied beige fat development. Mechanistically, Pdgfrβ deletion upregulated IL-33, promoting ILC2 recruitment and activation, whereas Pdgfrβ activation reduced IL-33 levels and suppressed ILC2 activity. Notably, diet-induced obesity markedly increased Pdgfrβ expression and Stat1 signaling, which inhibited IL-33 induction and ILC2 activation. Genetic deletion of Pdgfrβ restored beige fat formation in obese mice, improving whole-body metabolism. CONCLUSIONS This study reveals that cold temperature exposure alone can trigger metabolic activation in aged mammals. However, reversing Pdgfrβ signaling in aged and obese mice not only restores beige fat formation but also renews metabolic function and enhances the immunological environment of white adipose tissue (WAT). These findings highlight Pdgfrβ as a crucial target for therapeutic strategies aimed at combating age- and obesity-related metabolic decline.
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Affiliation(s)
- Abigail M Benvie
- Division of Nutritional Sciences, Cornell University Ithaca, NY 14853, USA
| | - Daniel C Berry
- Division of Nutritional Sciences, Cornell University Ithaca, NY 14853, USA.
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Chen Q, Xiang D, Liang Y, Meng H, Zhang X, Lu J. Interleukin-33: Expression, regulation and function in adipose tissues. Int Immunopharmacol 2024; 143:113285. [PMID: 39362016 DOI: 10.1016/j.intimp.2024.113285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2024] [Revised: 09/26/2024] [Accepted: 09/27/2024] [Indexed: 10/05/2024]
Abstract
Interleukin-33 (IL-33) is a pleiotropic cytokine of the IL-1 family that plays a key role in innate and adaptive immune responses and contributes to tissue homeostasis. Its role in adipose tissue function has been extensively studied, as adipose tissue serves as an important mediator of metabolic dysfunction. In adipose tissue, IL-33 is primarily produced by stromal cells. Its production is regulated by factors, such as androgens, aging, sympathetic innervation, and various inflammatory stimuli that affect the proliferation and differentiation of IL-33-producing stromal cells. Many studies have elucidated the mechanisms by which IL-33 interacts with the immune system components, local nerve fibers, and adipocytes to influence energy balance, with important consequences in obesity, cold-induced thermogenesis, and aging-related metabolic dysfunction. Here, we detail our current understanding of the molecular events that regulate the production of IL-33 within adipose tissue and discuss its role in regulating adipose function.
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Affiliation(s)
- Qianjiang Chen
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, China
| | - Daochun Xiang
- The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yan Liang
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, China
| | - Haiyang Meng
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, China
| | - Xiaofen Zhang
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, China
| | - Jingli Lu
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, China.
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Huang Y, Zhu Y, Xia W, Xie H, Yu H, Chen L, Shi L, Yu R. Computed tomography-based body composition indicative of diabetes after hypertriglyceridemic acute pancreatitis. Diabetes Res Clin Pract 2024; 217:111862. [PMID: 39299391 DOI: 10.1016/j.diabres.2024.111862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 08/27/2024] [Accepted: 09/16/2024] [Indexed: 09/22/2024]
Abstract
BACKGROUND Post‑acute pancreatitis prediabetes/diabetes mellitus (PPDM‑A) is one of the common sequelae of acute pancreatitis (AP). The aim of our study was to build a machine learning (ML)-based prediction model for PPDM-A in hypertriglyceridemic acute pancreatitis (HTGP). METHODS We retrospectively enrolled 165 patients for our study. Demographic and laboratory data and body composition were collected. Multivariate logistic regression was applied to select features for ML. Support vector machine (SVM), linear discriminant analysis (LDA), and logistic regression (LR) were used to develop prediction models for PPDM-A. RESULTS 65 patients were diagnosed with PPDM-A, and 100 patients were diagnosed with non-PPDM-A. Of the 84 body composition-related parameters, 15 were significant in discriminating between the PPDM-A and non-PPDM-A groups. Using clinical indicators and body composition parameters to develop ML models, we found that the SVM model presented the best predictive ability, obtaining the best AUC=0.796 in the training cohort, and the LDA and LR model showing an AUC of 0.783 and 0.745, respectively. CONCLUSIONS The association between body composition and PPDM-A provides insight into the potential pathogenesis of PPDM-A. Our model is feasible for reliably predicting PPDM-A in the early stages of AP and enables early intervention in patients with potential PPDM-A.
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Affiliation(s)
- Yingbao Huang
- Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Department of Radiology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Yi Zhu
- School of the First Clinical Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Weizhi Xia
- Department of Radiology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Huanhuan Xie
- Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Huajun Yu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Lifang Chen
- Department of Radiology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Liuzhi Shi
- Department of Clinical Laboratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Risheng Yu
- Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
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4
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Khan S, Chang V, Winer DA. The inflammaging clock strikes IL-11! Immunity 2024; 57:2010-2012. [PMID: 39260354 PMCID: PMC11449161 DOI: 10.1016/j.immuni.2024.08.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2024] [Revised: 08/12/2024] [Accepted: 08/14/2024] [Indexed: 09/13/2024]
Abstract
Chronic inflammation is considered a hallmark of aging. In a recent issue of Nature, Widjaja et al. examined genetic and pharmacologic inhibition of interleukin (IL)-11 on aging pathology and found that inhibiting IL-11 signaling increases lifespan and healthspan in mice.
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Affiliation(s)
- Saad Khan
- Division of Cellular & Molecular Biology, Diabetes Research Group, Toronto General Hospital Research Institute (TGHRI), University Health Network, Toronto, ON M5G 1L7, Canada
| | - Veronica Chang
- Division of Cellular & Molecular Biology, Diabetes Research Group, Toronto General Hospital Research Institute (TGHRI), University Health Network, Toronto, ON M5G 1L7, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Daniel A Winer
- Division of Cellular & Molecular Biology, Diabetes Research Group, Toronto General Hospital Research Institute (TGHRI), University Health Network, Toronto, ON M5G 1L7, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M5S 1A8, Canada; Buck Institute for Research on Aging, 8001 Redwood Boulevard, Novato, CA 94945, USA; Department of Immunology, University of Toronto, Toronto, ON M5S 1A8, Canada.
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5
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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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6
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Natarajan D, Plakkot B, Tiwari K, Ekambaram S, Wang W, Rudolph M, Mohammad MA, Chacko SK, Subramanian M, Tarantini S, Yabluchanskiy A, Ungvari Z, Csiszar A, Balasubramanian P. Chronic β3-AR stimulation activates distinct thermogenic mechanisms in brown and white adipose tissue and improves systemic metabolism in aged mice. Aging Cell 2024:e14321. [PMID: 39177077 DOI: 10.1111/acel.14321] [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: 05/28/2024] [Revised: 07/30/2024] [Accepted: 08/03/2024] [Indexed: 08/24/2024] Open
Abstract
Adipose thermogenesis has been actively investigated as a therapeutic target for improving metabolic dysfunction in obesity. However, its applicability to middle-aged and older populations, which bear the highest obesity prevalence in the United States (approximately 40%), remains uncertain due to age-related decline in thermogenic responses. In this study, we investigated the effects of chronic thermogenic stimulation using the β3-adrenergic (AR) agonist CL316,243 (CL) on systemic metabolism and adipose function in aged (18-month-old) C57BL/6JN mice. Sustained β3-AR treatment resulted in reduced fat mass, increased energy expenditure, increased fatty acid oxidation and mitochondrial activity in adipose depots, improved glucose homeostasis, and a favorable adipokine profile. At the cellular level, CL treatment increased uncoupling protein 1 (UCP1)-dependent thermogenesis in brown adipose tissue (BAT). However, in white adipose tissue (WAT) depots, CL treatment increased glycerol and lipid de novo lipogenesis (DNL) and turnover suggesting the activation of the futile substrate cycle of lipolysis and reesterification in a UCP1-independent manner. Increased lipid turnover was also associated with the simultaneous upregulation of proteins involved in glycerol metabolism, fatty acid oxidation, and reesterification in WAT. Further, a dose-dependent impact of CL treatment on inflammation was observed, particularly in subcutaneous WAT, suggesting a potential mismatch between fatty acid supply and oxidation. These findings indicate that chronic β3-AR stimulation activates distinct cellular mechanisms that increase energy expenditure in BAT and WAT to improve systemic metabolism in aged mice. Considering that people lose BAT with aging, activation of futile lipid cycling in WAT presents a novel strategy for improving age-related metabolic dysfunction.
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Affiliation(s)
- Duraipandy Natarajan
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
- The Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Bhuvana Plakkot
- Department of Physiological Sciences, College of Veterinary Medicine, Oklahoma State University, Stillwater, Oklahoma, USA
| | - Kritika Tiwari
- The Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Shoba Ekambaram
- The Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Weidong Wang
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Michael Rudolph
- Department of Biochemistry and Physiology and Harold Hamm Diabetes Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Mahmoud A Mohammad
- USDA/ARS Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas, USA
| | - Shaji K Chacko
- USDA/ARS Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas, USA
| | - Madhan Subramanian
- Department of Physiological Sciences, College of Veterinary Medicine, Oklahoma State University, Stillwater, Oklahoma, USA
| | - Stefano Tarantini
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
- The Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
| | - Andriy Yabluchanskiy
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
- The Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
- Department of Health Promotion Sciences, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Zoltan Ungvari
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
- USDA/ARS Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
| | - Anna Csiszar
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
- The Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
| | - Priya Balasubramanian
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
- The Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
- Department of Biochemistry and Physiology and Harold Hamm Diabetes Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
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7
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Lee AH, Orliaguet L, Youm YH, Maeda R, Dlugos T, Lei Y, Coman D, Shchukina I, Andhey S, Smith SR, Ravussin E, Stadler K, Hyder F, Artyomov MN, Sugiura Y, Dixit VD. Cysteine depletion triggers adipose tissue thermogenesis and weight-loss. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.08.06.606880. [PMID: 39149397 PMCID: PMC11326254 DOI: 10.1101/2024.08.06.606880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 08/17/2024]
Abstract
Dietary interventions such as caloric restriction (CR)1 and methionine restriction2 that prolong lifespan induce the 'browning' of white adipose tissue (WAT), an adaptive metabolic response that increases heat production to maintain health3,4. However, how diet influences adipose browning and metabolic health is unclear. Here, we identified that weight-loss induced by CR in humans5 reduces cysteine concentration in WAT suggesting depletion of this amino-acid may be involved in metabolic benefits of CR. To investigate the role of cysteine on organismal metabolism, we created a cysteine-deficiency mouse model in which dietary cysteine was eliminated and cystathionine γ-lyase (CTH)6, the enzyme that synthesizes cysteine was conditionally deleted. Using this animal model, we found that systemic cysteine-depletion causes drastic weight-loss with increased fat utilization and browning of adipose tissue. The restoration of dietary cysteine in cysteine-deficient mice rescued weight loss together with reversal of adipose browning and increased food-intake in an on-demand fashion. Mechanistically, cysteine deficiency induced browning and weight loss is dependent on sympathetic nervous system derived noradrenaline signaling via β3-adrenergic-receptors and does not require UCP1. Therapeutically, in high-fat diet fed obese mice, one week of cysteine-deficiency caused 30% weight-loss and reversed inflammation. These findings thus establish that cysteine is essential for organismal metabolism as removal of cysteine in the host triggers adipose browning and rapid weight loss.
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Affiliation(s)
- Aileen H. Lee
- Department of Pathology, Yale School of Medicine, New Haven, CT 06520, USA
- Department of Comparative Medicine, Yale School of Medicine, New Haven, CT 06520, USA
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Lucie Orliaguet
- Department of Pathology, Yale School of Medicine, New Haven, CT 06520, USA
- Department of Comparative Medicine, Yale School of Medicine, New Haven, CT 06520, USA
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Yun-Hee Youm
- Department of Pathology, Yale School of Medicine, New Haven, CT 06520, USA
- Department of Comparative Medicine, Yale School of Medicine, New Haven, CT 06520, USA
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA
| | | | - Tamara Dlugos
- Department of Pathology, Yale School of Medicine, New Haven, CT 06520, USA
- Department of Comparative Medicine, Yale School of Medicine, New Haven, CT 06520, USA
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Yuanjiu Lei
- Department of Pathology, Yale School of Medicine, New Haven, CT 06520, USA
- Department of Comparative Medicine, Yale School of Medicine, New Haven, CT 06520, USA
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Daniel Coman
- Department of Radiology and Biomedical Imaging, School of Engineering and Applied Science, Yale University
- Department of Biomedical Engineering, School of Engineering and Applied Science, Yale University
| | - Irina Shchukina
- Department of Pathology and Immunology Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Sairam Andhey
- Department of Pathology and Immunology Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Steven R. Smith
- Translational Research Institute for Metabolism and Diabetes, AdventHealth, Orlando, FL, USA
| | - Eric Ravussin
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | | | - Fahmeed Hyder
- Department of Radiology and Biomedical Imaging, School of Engineering and Applied Science, Yale University
- Department of Biomedical Engineering, School of Engineering and Applied Science, Yale University
| | - Maxim N. Artyomov
- Department of Pathology and Immunology Washington University School of Medicine, St. Louis, MO 63110, USA
| | | | - Vishwa Deep Dixit
- Department of Pathology, Yale School of Medicine, New Haven, CT 06520, USA
- Department of Comparative Medicine, Yale School of Medicine, New Haven, CT 06520, USA
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA
- Yale Center for Research on Aging, Yale School of Medicine, New Haven, CT 06520, USA
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Weijie Z, Meng Z, Chunxiao W, Lingjie M, Anguo Z, Yan Z, Xinran C, Yanjiao X, Li S. Obesity-induced chronic low-grade inflammation in adipose tissue: A pathway to Alzheimer's disease. Ageing Res Rev 2024; 99:102402. [PMID: 38977081 DOI: 10.1016/j.arr.2024.102402] [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: 03/11/2024] [Revised: 06/19/2024] [Accepted: 06/30/2024] [Indexed: 07/10/2024]
Abstract
Alzheimer's disease (AD) is a leading cause of cognitive impairment worldwide. Overweight and obesity are strongly associated with comorbidities, such as hypertension, diabetes, and insulin resistance (IR), which contribute substantially to the development of AD and subsequent morbidity and mortality. Adipose tissue (AT) is a highly dynamic organ composed of a diverse array of cell types, which can be classified based on their anatomic localization or cellular composition. The expansion and remodeling of AT in the context of obesity involves immunometabolic and functional shifts steered by the intertwined actions of multiple immune cells and cytokine signaling within AT, which contribute to the development of metabolic disorders, IR, and systemic markers of chronic low-grade inflammation. Chronic low-grade inflammation, a prolonged, low-dose stimulation by specific immunogens that can progress from localized sites and affect multiple organs throughout the body, leads to neurodystrophy, increased apoptosis, and disruption of homeostasis, manifesting as brain atrophy and AD-related pathology. In this review, we sought to elucidate the mechanisms by which AT contributes to the onset and progression of AD in obesity through the mediation of chronic low-grade inflammation, particularly focusing on the roles of adipokines and AT-resident immune cells.
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Affiliation(s)
- Zhai Weijie
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Jilin University, Changchun, China; Cognitive Center, Department of Neurology, The First Hospital of Jilin University, Jilin University, Changchun, China
| | - Zhao Meng
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Jilin University, Changchun, China; Cognitive Center, Department of Neurology, The First Hospital of Jilin University, Jilin University, Changchun, China
| | - Wei Chunxiao
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Jilin University, Changchun, China; Cognitive Center, Department of Neurology, The First Hospital of Jilin University, Jilin University, Changchun, China
| | - Meng Lingjie
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Jilin University, Changchun, China; Cognitive Center, Department of Neurology, The First Hospital of Jilin University, Jilin University, Changchun, China
| | - Zhao Anguo
- Department of Urology, Dushu Lake Hospital Affiliated to Soochow University, Medical Center of Soochow University, Suzhou Dushu Lake Hospital, Suzhou 215000 China
| | - Zhang Yan
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Jilin University, Changchun, China; Cognitive Center, Department of Neurology, The First Hospital of Jilin University, Jilin University, Changchun, China
| | - Cui Xinran
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Jilin University, Changchun, China; Cognitive Center, Department of Neurology, The First Hospital of Jilin University, Jilin University, Changchun, China
| | - Xu Yanjiao
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Jilin University, Changchun, China; Cognitive Center, Department of Neurology, The First Hospital of Jilin University, Jilin University, Changchun, China
| | - Sun Li
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Jilin University, Changchun, China; Cognitive Center, Department of Neurology, The First Hospital of Jilin University, Jilin University, Changchun, China.
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9
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Natarajan D, Plakkot B, Tiwari K, Ekambaram S, Wang W, Rudolph M, Mohammad MA, Chacko SK, Subramanian M, Tarantini S, Yabluchanskiy A, Ungvari Z, Csiszar A, Balasubramanian P. The metabolic benefits of thermogenic stimulation are preserved in aging. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.01.601572. [PMID: 39005396 PMCID: PMC11244901 DOI: 10.1101/2024.07.01.601572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
Adipose thermogenesis has been actively investigated as a therapeutic target for improving metabolic dysfunction in obesity. However, its applicability to middle-aged and older populations, which bear the highest obesity prevalence in the US (approximately 40%), remains uncertain due to age-related decline in thermogenic responses. In this study, we investigated the effects of chronic thermogenic stimulation using the β3-adrenergic (AR) agonist CL316,243 (CL) on systemic metabolism and adipose function in aged (18-month-old) C57BL/6JN mice. Sustained β3-AR treatment resulted in reduced fat mass, increased energy expenditure, increased fatty acid oxidation and mitochondrial activity in adipose depots, improved glucose homeostasis, and a favorable adipokine profile. At the cellular level, CL treatment increased uncoupling protein 1 (UCP1)-dependent thermogenesis in brown adipose tissue (BAT). However, in white adipose tissue (WAT) depots, CL treatment increased glycerol and lipid de novo lipogenesis (DNL) and turnover suggesting the activation of the futile substrate cycle of lipolysis and reesterification in a UCP1-independent manner. Increased lipid turnover was also associated with the simultaneous upregulation of proteins involved in glycerol metabolism, fatty acid oxidation, and reesterification in WAT. Further, a dose-dependent impact of CL treatment on inflammation was observed, particularly in subcutaneous WAT, suggesting a potential mismatch between fatty acid supply and oxidation. These findings indicate that chronic β3-AR stimulation activates distinct cellular mechanisms that increase energy expenditure in BAT and WAT to improve systemic metabolism in aged mice. Our study provides foundational evidence for targeting adipose thermogenesis to improve age-related metabolic dysfunction.
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Burak MF, Stanley TL, Lawson EA, Campbell SL, Lynch L, Hasty AH, Domingos AI, Dixit VD, Hotamışlıgil GS, Sheedy FJ, Dixon AE, Brinkley TE, Hill JA, Donath MY, Grinspoon SK. Adiposity, immunity, and inflammation: interrelationships in health and disease: a report from 24th Annual Harvard Nutrition Obesity Symposium, June 2023. Am J Clin Nutr 2024; 120:257-268. [PMID: 38705359 PMCID: PMC11347817 DOI: 10.1016/j.ajcnut.2024.04.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 04/09/2024] [Accepted: 04/29/2024] [Indexed: 05/07/2024] Open
Abstract
The rapidly evolving field of immunometabolism explores how changes in local immune environments may affect key metabolic and cellular processes, including that of adipose tissue. Importantly, these changes may contribute to low-grade systemic inflammation. In turn, chronic low-grade inflammation affecting adipose tissue may exacerbate the outcome of metabolic diseases. Novel advances in our understanding of immunometabolic processes may critically lead to interventions to reduce disease severity and progression. An important example in this regard relates to obesity, which has a multifaceted effect on immunity, activating the proinflammatory pathways such as the inflammasome and disrupting cellular homeostasis. This multifaceted effect of obesity can be investigated through study of downstream conditions using cellular and systemic investigative techniques. To further explore this field, the National Institutes of Health P30 Nutrition Obesity Research Center at Harvard, in partnership with Harvard Medical School, assembled experts to present at its 24th Annual Symposium entitled "Adiposity, Immunity, and Inflammation: Interrelationships in Health and Disease" on 7 June, 2023. This manuscript seeks to synthesize and present key findings from the symposium, highlighting new research and novel disease-specific advances in the field. Better understanding the interaction between metabolism and immunity offers promising preventative and treatment therapies for obesity-related immunometabolic diseases.
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Affiliation(s)
- Mehmet Furkan Burak
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States; Department of Molecular Metabolism and Sabri Ülker Center, Harvard T.H. Chan School of Public Health, Boston, MA, United States.
| | - Takara L Stanley
- Metabolism Unit, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States; Division of Pediatric Endocrinology, Massachusetts General Hospital for Children and Harvard Medical School, Boston, MA, United States
| | - Elizabeth A Lawson
- Neuroendocrine Unit, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
| | - Sophia L Campbell
- Metabolism Unit, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Lydia Lynch
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Alyssa H Hasty
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, VA Tennessee Valley Healthcare System, Nashville, TN, United States
| | - Ana I Domingos
- Department of Physiology, Anatomy & Genetics, Oxford University, Oxford, United Kingdom
| | - Vishwa D Dixit
- Department of Pathology, Department of Comparative Medicine, Department of Immunobiology, Yale School of Medicine, and Yale Center for Research on Aging, New Haven, CT, United States
| | - Gökhan S Hotamışlıgil
- Department of Molecular Metabolism and Sabri Ülker Center, Harvard T.H. Chan School of Public Health, Boston, MA, United States; Broad Institute of Harvard and MIT, Cambridge, MA, United States
| | - Frederick J Sheedy
- School of Biochemistry & Immunology, Trinity Biomedical Sciences Institute, Trinity College, Dublin, Ireland
| | - Anne E Dixon
- Department of Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, United States
| | - Tina E Brinkley
- Department of Internal Medicine, Section of Gerontology and Geriatric Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, United States
| | - Joseph A Hill
- Division of Cardiology, Department of Internal Medicine, Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Marc Y Donath
- Department of Biomedicine, University of Basel, Basel, Switzerland; Clinic of Endocrinology, Diabetes & Metabolism, University Hospital Basel, Basel, Switzerland
| | - Steven K Grinspoon
- Metabolism Unit, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
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11
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Benvie AM, Berry DC. Reversing Pdgfrβ Signaling Restores Metabolically Active Beige Adipocytes by Alleviating ILC2 Suppression in Aged and Obese Mice. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.17.599436. [PMID: 38948810 PMCID: PMC11212986 DOI: 10.1101/2024.06.17.599436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
Objective Platelet Derived Growth Factor Receptor Beta (Pdgfrβ) suppresses the formation of cold temperature-induced beige adipocytes in aged mammals. We aimed to determine if deleting Pdgfrβ in aged mice could rejuvenate metabolically active beige adipocytes by activating group 2 innate lymphoid cells (ILC2), and whether this effect could counteract diet-induced obesity-associated beige fat decline. Methods We employed Pdgfrβ gain-of-function and loss-of-function mouse models targeting beige adipocyte progenitor cells (APCs). Our approach included cold exposure, metabolic cage analysis, and age and diet-induced obesity models to examine beige fat development and metabolic function under varied Pdgfrβ activity. Results Acute cold exposure alone enhanced metabolic benefits in aged mice, irrespective of beige fat generation. However, Pdgfrβ deletion in aged mice reestablished the formation of metabolically functional beige adipocytes, enhancing metabolism. Conversely, constitutive Pdgfrβ activation in young mice stymied beige fat development. Mechanistically, Pdgfrβ deletion upregulated IL-33, promoting ILC2 recruitment and activation, whereas Pdgfrβ activation reduced IL-33 levels and suppressed ILC2 activity. Notably, diet-induced obesity markedly increased Pdgfrβ expression and Stat1 signaling, which inhibited IL-33 induction and ILC2 activation. Genetic deletion of Pdgfrβ restored beige fat formation in obese mice, improving whole-body metabolism. Conclusion This study reveals that cold temperature exposure alone can trigger metabolic activation in aged mammals. However, reversing Pdgfrβ signaling in aged and obese mice not only restores beige fat formation but also renews metabolic function and enhances the immunological environment of white adipose tissue (WAT). These findings highlight Pdgfrβ as a crucial target for therapeutic strategies aimed at combating age- and obesity-related metabolic decline.
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Affiliation(s)
- Abigail M. Benvie
- Division of Nutritional Sciences, Cornell University Ithaca, NY 14853 USA
| | - Daniel C. Berry
- Division of Nutritional Sciences, Cornell University Ithaca, NY 14853 USA
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12
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Suryadevara V, Hudgins AD, Rajesh A, Pappalardo A, Karpova A, Dey AK, Hertzel A, Agudelo A, Rocha A, Soygur B, Schilling B, Carver CM, Aguayo-Mazzucato C, Baker DJ, Bernlohr DA, Jurk D, Mangarova DB, Quardokus EM, Enninga EAL, Schmidt EL, Chen F, Duncan FE, Cambuli F, Kaur G, Kuchel GA, Lee G, Daldrup-Link HE, Martini H, Phatnani H, Al-Naggar IM, Rahman I, Nie J, Passos JF, Silverstein JC, Campisi J, Wang J, Iwasaki K, Barbosa K, Metis K, Nernekli K, Niedernhofer LJ, Ding L, Wang L, Adams LC, Ruiyang L, Doolittle ML, Teneche MG, Schafer MJ, Xu M, Hajipour M, Boroumand M, Basisty N, Sloan N, Slavov N, Kuksenko O, Robson P, Gomez PT, Vasilikos P, Adams PD, Carapeto P, Zhu Q, Ramasamy R, Perez-Lorenzo R, Fan R, Dong R, Montgomery RR, Shaikh S, Vickovic S, Yin S, Kang S, Suvakov S, Khosla S, Garovic VD, Menon V, Xu Y, Song Y, Suh Y, Dou Z, Neretti N. SenNet recommendations for detecting senescent cells in different tissues. Nat Rev Mol Cell Biol 2024:10.1038/s41580-024-00738-8. [PMID: 38831121 DOI: 10.1038/s41580-024-00738-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/15/2024] [Indexed: 06/05/2024]
Abstract
Once considered a tissue culture-specific phenomenon, cellular senescence has now been linked to various biological processes with both beneficial and detrimental roles in humans, rodents and other species. Much of our understanding of senescent cell biology still originates from tissue culture studies, where each cell in the culture is driven to an irreversible cell cycle arrest. By contrast, in tissues, these cells are relatively rare and difficult to characterize, and it is now established that fully differentiated, postmitotic cells can also acquire a senescence phenotype. The SenNet Biomarkers Working Group was formed to provide recommendations for the use of cellular senescence markers to identify and characterize senescent cells in tissues. Here, we provide recommendations for detecting senescent cells in different tissues based on a comprehensive analysis of existing literature reporting senescence markers in 14 tissues in mice and humans. We discuss some of the recent advances in detecting and characterizing cellular senescence, including molecular senescence signatures and morphological features, and the use of circulating markers. We aim for this work to be a valuable resource for both seasoned investigators in senescence-related studies and newcomers to the field.
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Affiliation(s)
- Vidyani Suryadevara
- Department of Radiology, Molecular Imaging Program at Stanford (MIPS), Stanford University, School of Medicine, Stanford, CA, USA
| | - Adam D Hudgins
- Department of Obstetrics and Gynecology, Columbia University, New York, NY, USA
| | - Adarsh Rajesh
- Sanford Burnham Prebys Medical Discovery Institute, Cancer Genome and Epigenetics Program, La Jolla, CA, USA
| | | | - Alla Karpova
- Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Amit K Dey
- National Institute on Aging, NIH, Baltimore, MD, USA
| | - Ann Hertzel
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, USA
- Institute on the Biology of Aging and Metabolism, University of Minnesota, Minneapolis, MN, USA
| | - Anthony Agudelo
- Department of Molecular Biology, Cell Biology, and Biochemistry, Brown University, Providence, RI, USA
- Center on the Biology of Aging, Brown University, Providence, RI, USA
| | - Azucena Rocha
- Department of Molecular Biology, Cell Biology, and Biochemistry, Brown University, Providence, RI, USA
- Center on the Biology of Aging, Brown University, Providence, RI, USA
| | - Bikem Soygur
- The Buck Institute for Research on Aging, Novato, CA, USA
| | | | - Chase M Carver
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
- Robert and Arlene Kogod Center on Aging, Rochester, MN, USA
| | - Cristina Aguayo-Mazzucato
- Islet Cell Biology and Regenerative Medicine, Joslin Diabetes Center, Harvard Medical School, Boston, USA
| | - Darren J Baker
- Robert and Arlene Kogod Center on Aging, Rochester, MN, USA
- Department of Biochemistry and Molecular Biology, Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN, USA
| | - David A Bernlohr
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, USA
- Institute on the Biology of Aging and Metabolism, University of Minnesota, Minneapolis, MN, USA
| | - Diana Jurk
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
- Robert and Arlene Kogod Center on Aging, Rochester, MN, USA
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
| | - Dilyana B Mangarova
- Department of Radiology, Molecular Imaging Program at Stanford (MIPS), Stanford University, School of Medicine, Stanford, CA, USA
| | - Ellen M Quardokus
- Department of Intelligent Systems Engineering, Indiana University, Bloomington, IN, USA
| | | | - Elizabeth L Schmidt
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, USA
- Institute on the Biology of Aging and Metabolism, University of Minnesota, Minneapolis, MN, USA
| | - Feng Chen
- Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Francesca E Duncan
- The Buck Institute for Research on Aging, Novato, CA, USA
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | | | - Gagandeep Kaur
- Department of Environmental Medicine, University of Rochester Medical Center, Rochester, NY, USA
| | - George A Kuchel
- UConn Center on Aging, University of Connecticut Health Center, Farmington, CT, USA
- Department of Genetics and Genome Sciences, University of Connecticut Health Center, Farmington, CT, USA
| | - Gung Lee
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
- Robert and Arlene Kogod Center on Aging, Rochester, MN, USA
| | - Heike E Daldrup-Link
- Department of Radiology, Molecular Imaging Program at Stanford (MIPS), Stanford University, School of Medicine, Stanford, CA, USA
| | - Helene Martini
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
- Robert and Arlene Kogod Center on Aging, Rochester, MN, USA
| | - Hemali Phatnani
- New York Genome Center, New York, NY, USA
- Department of Neurology, Columbia University Irving Medical Center, New York, NY, USA
| | - Iman M Al-Naggar
- UConn Center on Aging, University of Connecticut Health Center, Farmington, CT, USA
| | - Irfan Rahman
- Department of Environmental Medicine, University of Rochester Medical Center, Rochester, NY, USA
| | - Jia Nie
- Barshop Institute for Longevity and Aging Studies, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - João F Passos
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
- Robert and Arlene Kogod Center on Aging, Rochester, MN, USA
| | - Jonathan C Silverstein
- Department of Biomedical Informatics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Judith Campisi
- The Buck Institute for Research on Aging, Novato, CA, USA
| | - Julia Wang
- Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Kanako Iwasaki
- Islet Cell Biology and Regenerative Medicine, Joslin Diabetes Center, Harvard Medical School, Boston, USA
| | - Karina Barbosa
- Sanford Burnham Prebys Medical Discovery Institute, Cancer Genome and Epigenetics Program, La Jolla, CA, USA
| | - Kay Metis
- Department of Biomedical Informatics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Kerem Nernekli
- Department of Radiology, Molecular Imaging Program at Stanford (MIPS), Stanford University, School of Medicine, Stanford, CA, USA
| | - Laura J Niedernhofer
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, USA
- Institute on the Biology of Aging and Metabolism, University of Minnesota, Minneapolis, MN, USA
| | - Li Ding
- Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Lichao Wang
- UConn Center on Aging, University of Connecticut Health Center, Farmington, CT, USA
- Department of Genetics and Genome Sciences, University of Connecticut Health Center, Farmington, CT, USA
| | - Lisa C Adams
- Department of Radiology, Molecular Imaging Program at Stanford (MIPS), Stanford University, School of Medicine, Stanford, CA, USA
| | - Liu Ruiyang
- Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Madison L Doolittle
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
- Robert and Arlene Kogod Center on Aging, Rochester, MN, USA
- Division of Endocrinology, Diabetes and Metabolism, Mayo Clinic, Rochester, MN, USA
| | - Marcos G Teneche
- Sanford Burnham Prebys Medical Discovery Institute, Cancer Genome and Epigenetics Program, La Jolla, CA, USA
| | - Marissa J Schafer
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
- Robert and Arlene Kogod Center on Aging, Rochester, MN, USA
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
| | - Ming Xu
- UConn Center on Aging, University of Connecticut Health Center, Farmington, CT, USA
- Department of Genetics and Genome Sciences, University of Connecticut Health Center, Farmington, CT, USA
| | - Mohammadjavad Hajipour
- Department of Radiology, Molecular Imaging Program at Stanford (MIPS), Stanford University, School of Medicine, Stanford, CA, USA
| | | | | | - Nicholas Sloan
- Department of Neurology, Columbia University Medical Center, New York, NY, USA
| | - Nikolai Slavov
- Center on the Biology of Aging, Brown University, Providence, RI, USA
- Department of Bioengineering, Northeastern University, Boston, MA, USA
- Department of Biology, Northeastern University, Boston, MA, USA
- Barnett Institute for Chemical and Biological Analysis, Northeastern University, Boston, MA, USA
| | - Olena Kuksenko
- Department of Neurology, Columbia University Medical Center, New York, NY, USA
| | - Paul Robson
- The Jackson Laboratory for Genomic Medicine, Farmington, CT, USA
- Institute for Systems Genomics, University of Connecticut, Farmington, CT, USA
| | - Paul T Gomez
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
- Robert and Arlene Kogod Center on Aging, Rochester, MN, USA
| | - Periklis Vasilikos
- Department of Genetics and Development, Columbia University, New York, NY, USA
| | - Peter D Adams
- Sanford Burnham Prebys Medical Discovery Institute, Cancer Genome and Epigenetics Program, La Jolla, CA, USA
| | - Priscila Carapeto
- Islet Cell Biology and Regenerative Medicine, Joslin Diabetes Center, Harvard Medical School, Boston, USA
| | - Quan Zhu
- Center for Epigenomics, University of California, San Diego, CA, USA
| | | | | | - Rong Fan
- Yale-Center for Research on Aging, Yale School of Medicine, New Haven, CT, USA
| | - Runze Dong
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Graduate Program in Biological Physics, Structure and Design, University of Washington, Seattle, WA, USA
| | - Ruth R Montgomery
- Yale-Center for Research on Aging, Yale School of Medicine, New Haven, CT, USA
| | - Sadiya Shaikh
- Department of Environmental Medicine, University of Rochester Medical Center, Rochester, NY, USA
| | - Sanja Vickovic
- New York Genome Center, New York, NY, USA
- Herbert Irving Institute for Cancer Dynamics, Columbia University, New York, NY, USA
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
- Science for Life Laboratory, Department of Immunology, Genetics and Pathology, Beijer Laboratory for Gene and Neuro Research, Uppsala University, Uppsala, Sweden
| | - Shanshan Yin
- Sanford Burnham Prebys Medical Discovery Institute, Cancer Genome and Epigenetics Program, La Jolla, CA, USA
| | - Shoukai Kang
- Department of Biochemistry, University of Washington, Seattle, WA, USA
| | - Sonja Suvakov
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN, USA
| | - Sundeep Khosla
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
- Robert and Arlene Kogod Center on Aging, Rochester, MN, USA
- Division of Endocrinology, Diabetes and Metabolism, Mayo Clinic, Rochester, MN, USA
| | - Vesna D Garovic
- Department of Obstetrics and Gynecology, Mayo Clinic, Rochester, MN, USA
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN, USA
| | - Vilas Menon
- Department of Neurology, Columbia University Irving Medical Center, New York, NY, USA
- Center for Translational and Computational Neuroimmunology, Columbia University Irving Medical Center, New York, NY, USA
| | - Yanxin Xu
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA, USA
- Harvard Stem Cell Institute, Harvard University, Cambridge, MA, USA
- Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Yizhe Song
- Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Yousin Suh
- Department of Obstetrics and Gynecology, Columbia University, New York, NY, USA
- Department of Genetics and Development, Columbia University, New York, NY, USA
| | - Zhixun Dou
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA, USA
- Harvard Stem Cell Institute, Harvard University, Cambridge, MA, USA
- Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Nicola Neretti
- Department of Molecular Biology, Cell Biology, and Biochemistry, Brown University, Providence, RI, USA.
- Center on the Biology of Aging, Brown University, Providence, RI, USA.
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13
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Holman CD, Sakers AP, Calhoun RP, Cheng L, Fein EC, Jacobs C, Tsai L, Rosen ED, Seale P. Aging impairs cold-induced beige adipogenesis and adipocyte metabolic reprogramming. eLife 2024; 12:RP87756. [PMID: 38775132 PMCID: PMC11111218 DOI: 10.7554/elife.87756] [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] [Indexed: 05/24/2024] Open
Abstract
The energy-burning capability of beige adipose tissue is a potential therapeutic tool for reducing obesity and metabolic disease, but this capacity is decreased by aging. Here, we evaluate the impact of aging on the profile and activity of adipocyte stem and progenitor cells (ASPCs) and adipocytes during the beiging process in mice. We found that aging increases the expression of Cd9 and other fibro-inflammatory genes in fibroblastic ASPCs and blocks their differentiation into beige adipocytes. Fibroblastic ASPC populations from young and aged mice were equally competent for beige differentiation in vitro, suggesting that environmental factors suppress adipogenesis in vivo. Examination of adipocytes by single nucleus RNA-sequencing identified compositional and transcriptional differences in adipocyte populations with aging and cold exposure. Notably, cold exposure induced an adipocyte population expressing high levels of de novo lipogenesis (DNL) genes, and this response was severely blunted in aged animals. We further identified Npr3, which encodes the natriuretic peptide clearance receptor, as a marker gene for a subset of white adipocytes and an aging-upregulated gene in adipocytes. In summary, this study indicates that aging blocks beige adipogenesis and dysregulates adipocyte responses to cold exposure and provides a resource for identifying cold and aging-regulated pathways in adipose tissue.
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Affiliation(s)
- Corey D Holman
- Institute for Diabetes, Obesity & Metabolism, Perelman School of Medicine at the University of PennsylvaniaPhiladelphiaUnited States
- Department of Cell and Developmental Biology; Perelman School of Medicine at the University of PennsylvaniaPhiladelphiaUnited States
| | - Alexander P Sakers
- Institute for Diabetes, Obesity & Metabolism, Perelman School of Medicine at the University of PennsylvaniaPhiladelphiaUnited States
- Department of Cell and Developmental Biology; Perelman School of Medicine at the University of PennsylvaniaPhiladelphiaUnited States
| | - Ryan P Calhoun
- Institute for Diabetes, Obesity & Metabolism, Perelman School of Medicine at the University of PennsylvaniaPhiladelphiaUnited States
- Department of Cell and Developmental Biology; Perelman School of Medicine at the University of PennsylvaniaPhiladelphiaUnited States
| | - Lan Cheng
- Institute for Diabetes, Obesity & Metabolism, Perelman School of Medicine at the University of PennsylvaniaPhiladelphiaUnited States
- Department of Cell and Developmental Biology; Perelman School of Medicine at the University of PennsylvaniaPhiladelphiaUnited States
| | - Ethan C Fein
- Institute for Diabetes, Obesity & Metabolism, Perelman School of Medicine at the University of PennsylvaniaPhiladelphiaUnited States
- Department of Cell and Developmental Biology; Perelman School of Medicine at the University of PennsylvaniaPhiladelphiaUnited States
| | - Christopher Jacobs
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical CenterBostonUnited States
- Broad Institute of MIT and HarvardCambridgeUnited States
| | - Linus Tsai
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical CenterBostonUnited States
- Broad Institute of MIT and HarvardCambridgeUnited States
- Harvard Medical SchoolBostonUnited States
| | - Evan D Rosen
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical CenterBostonUnited States
- Broad Institute of MIT and HarvardCambridgeUnited States
- Harvard Medical SchoolBostonUnited States
| | - Patrick Seale
- Institute for Diabetes, Obesity & Metabolism, Perelman School of Medicine at the University of PennsylvaniaPhiladelphiaUnited States
- Department of Cell and Developmental Biology; Perelman School of Medicine at the University of PennsylvaniaPhiladelphiaUnited States
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14
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Soedono S, Sharlene S, Vo DHN, Averia M, Rosalie EE, Lee YK, Cho KW. Obese visceral adipose dendritic cells downregulate regulatory T cell development through IL-33. Front Immunol 2024; 15:1335651. [PMID: 38566998 PMCID: PMC10985834 DOI: 10.3389/fimmu.2024.1335651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 03/08/2024] [Indexed: 04/04/2024] Open
Abstract
Regulatory T cells (Tregs) residing in visceral adipose tissue (VAT) play a pivotal role in regulating tissue inflammation and metabolic dysfunction associated with obesity. However, the specific phenotypic and functional characteristics of Tregs in obese VAT, as well as the regulatory mechanisms shaping them, remain elusive. This study demonstrates that obesity selectively reduces Tregs in VAT, characterized by restrained proliferation, heightened PD-1 expression, and diminished ST2 expression. Additionally, obese VAT displays distinctive maturation of dendritic cells (DCs), marked by elevated expressions of MHC-II, CD86, and PD-L1, which are inversely correlated with VAT Tregs. In an in vitro co-culture experiment, only obese VAT DCs, not macrophages or DCs from subcutaneous adipose tissue (SAT) and spleen, result in decreased Treg differentiation and proliferation. Furthermore, Tregs differentiated by obese VAT DCs exhibit distinct characteristics resembling those of Tregs in obese VAT, such as reduced ST2 and IL-10 expression. Mechanistically, obesity lowers IL-33 production in VAT DCs, contributing to the diminished Treg differentiation. These findings collectively underscore the critical role of VAT DCs in modulating Treg generation and shaping Treg phenotype and function during obesity, potentially contributing to the regulation of VAT Treg populations.
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Affiliation(s)
- Shindy Soedono
- Department of Integrated Biomedical Science, Soonchunhyang University, Cheonan, Republic of Korea
- Soonchunhyang Institute of Medi-bio Science (SIMS), Soonchunhyang University, Cheonan, Republic of Korea
| | - Sharlene Sharlene
- Department of Integrated Biomedical Science, Soonchunhyang University, Cheonan, Republic of Korea
- Soonchunhyang Institute of Medi-bio Science (SIMS), Soonchunhyang University, Cheonan, Republic of Korea
| | - Dan Hoang Nguyet Vo
- Department of Integrated Biomedical Science, Soonchunhyang University, Cheonan, Republic of Korea
- Soonchunhyang Institute of Medi-bio Science (SIMS), Soonchunhyang University, Cheonan, Republic of Korea
| | - Maria Averia
- Magister of Biotechnology, Atma Jaya Catholic University of Indonesia, Jakarta, Indonesia
| | - Eufrasia Elaine Rosalie
- Faculty of Biotechnology, Department of Food Technology, Atma Jaya Catholic University of Indonesia, Jakarta, Indonesia
| | - Yun Kyung Lee
- Department of Integrated Biomedical Science, Soonchunhyang University, Cheonan, Republic of Korea
- Soonchunhyang Institute of Medi-bio Science (SIMS), Soonchunhyang University, Cheonan, Republic of Korea
| | - Kae Won Cho
- Department of Integrated Biomedical Science, Soonchunhyang University, Cheonan, Republic of Korea
- Soonchunhyang Institute of Medi-bio Science (SIMS), Soonchunhyang University, Cheonan, Republic of Korea
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15
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Chen Y, Ma L, Cheng Z, Hu Z, Xu Y, Wu J, Dai Y, Shi C. Senescent fibroblast facilitates re-epithelization and collagen deposition in radiation-induced skin injury through IL-33-mediated macrophage polarization. J Transl Med 2024; 22:176. [PMID: 38369466 PMCID: PMC10874572 DOI: 10.1186/s12967-024-04972-8] [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: 12/13/2023] [Accepted: 02/09/2024] [Indexed: 02/20/2024] Open
Abstract
BACKGROUND The need for radiotherapy among the elderly rises with increasing life expectancy and a corresponding increase of elderly cancer patients. Radiation-induced skin injury is one of the most frequent adverse effects in radiotherapy patients, severely limiting their life quality. Re-epithelialization and collagen deposition have essential roles in the recovery of skin injuries induced by high doses of ionizing radiation. At the same time, radiation-induced senescent cells accumulate in irradiated tissues. However, the effects and mechanisms of senescent cells on re-epithelialization and collagen deposition in radiation-induced skin injury have not been fully elucidated. RESULTS Here, we identified a role for a population of senescent cells expressing p16 in promoting re-epithelialization and collagen deposition in radiation-induced skin injury. Targeted ablation of p16+ senescent cells or treatment with Senolytics resulted in the disruption of collagen structure and the retardation of epidermal coverage. By analyzing a publicly available single-cell sequencing dataset, we identified fibroblasts as a major contributor to the promotion of re-epithelialization and collagen deposition in senescent cells. Notably, our analysis of publicly available transcriptome sequencing data highlighted IL-33 as a key senescence-associated secretory phenotype produced by senescent fibroblasts. Neutralizing IL-33 significantly impedes the healing process. Finally, we found that the effect of IL-33 was partly due to the modulation of macrophage polarization. CONCLUSIONS In conclusion, our data suggested that senescent fibroblasts accumulated in radiation-induced skin injury sites participated in wound healing mainly by secreting IL-33. This secretion regulated the local immune microenvironment and macrophage polarization, thus emphasizing the importance of precise regulation of senescent cells in a phased manner.
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Affiliation(s)
- Yan Chen
- Institute of Rocket Force Medicine, State Key Laboratory of Trauma and Chemical Poisoning, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Le Ma
- Institute of Rocket Force Medicine, State Key Laboratory of Trauma and Chemical Poisoning, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Zhuo Cheng
- Institute of Rocket Force Medicine, State Key Laboratory of Trauma and Chemical Poisoning, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Zhihe Hu
- Institute of Rocket Force Medicine, State Key Laboratory of Trauma and Chemical Poisoning, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Yang Xu
- Institute of Rocket Force Medicine, State Key Laboratory of Trauma and Chemical Poisoning, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Jie Wu
- Institute of Rocket Force Medicine, State Key Laboratory of Trauma and Chemical Poisoning, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Yali Dai
- Institute of Rocket Force Medicine, State Key Laboratory of Trauma and Chemical Poisoning, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Chunmeng Shi
- Institute of Rocket Force Medicine, State Key Laboratory of Trauma and Chemical Poisoning, Third Military Medical University (Army Medical University), Chongqing, 400038, China.
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16
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Zhao Y, Yue R. Aging adipose tissue, insulin resistance, and type 2 diabetes. Biogerontology 2024; 25:53-69. [PMID: 37725294 DOI: 10.1007/s10522-023-10067-6] [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: 06/18/2023] [Accepted: 08/28/2023] [Indexed: 09/21/2023]
Abstract
With the increase of population aging, the prevalence of type 2 diabetes (T2D) is also rising. Aging affects the tissues and organs of the whole body, which is the result of various physiological and pathological processes. Adipose tissue has a high degree of plasticity and changes with aging. Aging changes the distribution of adipose tissue, affects adipogenesis, browning characteristics, inflammatory status and adipokine secretion, and increases lipotoxicity. These age-dependent changes in adipose tissue are an important cause of insulin resistance and T2D. Understanding adipose tissue changes can help promote healthy aging process. This review summarizes changes in adipose tissue ascribable to aging, with a focus on the role of aging adipose tissue in insulin resistance and T2D.
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Affiliation(s)
- Yixuan Zhao
- Hospital of Chengdu University of Traditional Chinese Medicine, NO. 39 Shi-Er-Qiao Road, Chengdu, 610072, Sichuan Province, People's Republic of China
| | - Rensong Yue
- Hospital of Chengdu University of Traditional Chinese Medicine, NO. 39 Shi-Er-Qiao Road, Chengdu, 610072, Sichuan Province, People's Republic of China.
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17
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Mukherjee S, Bruno MEC, Oakes J, Hawk GS, Stromberg AJ, Cohen DA, Starr ME. Mechanisms of γδ T cell accumulation in visceral adipose tissue with aging. FRONTIERS IN AGING 2024; 4:1258836. [PMID: 38274288 PMCID: PMC10808514 DOI: 10.3389/fragi.2023.1258836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 12/22/2023] [Indexed: 01/27/2024]
Abstract
γδ T cells are resident in visceral adipose tissue (VAT) where they show an age-associated increase in numbers and contribute to local and systemic chronic inflammation. However, regulation of this population and mechanisms for the age-dependent accumulation are not known. In this study, we identified a progressive trend of γδ T cell accumulation in VAT over the lifespan in mice and explored physiological mechanisms contributing to accumulation. Using isochronic parabiotic pairs of wild-type (WT) and T cell receptor delta knockout (TCRδ KO) mice at young and old age, we confirmed that VAT γδ T cells are predominately a tissue-resident population which is sustained in aging. Migration of peripheral γδ T cells into VAT was observed at less than 10%, with a decreasing trend by aging, suggesting a minor contribution of recruitment to γδ T cell accumulation with aging. Since tissue-resident T cell numbers are tightly regulated by a balance between proliferation and programmed cell death, we further explored these processes. Using in vivo EdU incorporation and the proliferation marker Ki67, we found that the absolute number of proliferating γδ T cells in VAT is significantly higher in the aged compared to young and middle-aged mice, despite a decline in the proportion of proliferating to non-proliferating cells by age. Analysis of apoptosis via caspase 3/7 activation revealed that VAT γδ T cells show reduced apoptosis starting at middle age and continuing into old age. Further, induction of apoptosis using pharmacological inhibitors of Bcl2 family proteins revealed that VAT γδ T cells at middle age are uniquely protected from apoptosis via a mechanism independent of traditional anti-apoptotic Bcl2-family proteins. Collectively, these data indicate that protection from apoptosis at middle age increases survival of tissue-resident γδ T cells resulting in an increased number of proliferative cells from middle age onward, and leading to the age-associated accumulation of γδ T cells in VAT. These findings are important to better understand how adipose tissue dysfunction and related changes in the immune profile contribute to inflammaging among the elderly.
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Affiliation(s)
- Sujata Mukherjee
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY, United States
| | - Maria E. C. Bruno
- Division of Research, Department of Surgery, University of Kentucky, Lexington, KY, United States
| | - Jason Oakes
- Division of Laboratory Animal Resources, University of Kentucky, Lexington, KY, United States
| | - Gregory S. Hawk
- Dr. Bing Zhang Department of Statistics, University of Kentucky, Lexington, KY, United States
| | - Arnold J. Stromberg
- Dr. Bing Zhang Department of Statistics, University of Kentucky, Lexington, KY, United States
| | - Donald A. Cohen
- Department of Microbiology, Immunology, and Molecular Genetics, University of Kentucky, Lexington, KY, United States
| | - Marlene E. Starr
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY, United States
- Division of Research, Department of Surgery, University of Kentucky, Lexington, KY, United States
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18
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Haberman ER, Sarker G, Arús BA, Ziegler KA, Meunier S, Martínez-Sánchez N, Freibergerová E, Yilmaz-Özcan S, Fernández-González I, Zentai C, O'Brien CJO, Grainger DE, Sidarta-Oliveira D, Chakarov S, Raimondi A, Iannacone M, Engelhardt S, López M, Ginhoux F, Domingos AI. Immunomodulatory leptin receptor + sympathetic perineurial barrier cells protect against obesity by facilitating brown adipose tissue thermogenesis. Immunity 2024; 57:141-152.e5. [PMID: 38091996 DOI: 10.1016/j.immuni.2023.11.006] [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: 05/31/2023] [Revised: 10/30/2023] [Accepted: 11/10/2023] [Indexed: 01/12/2024]
Abstract
Adipose tissues (ATs) are innervated by sympathetic nerves, which drive reduction of fat mass via lipolysis and thermogenesis. Here, we report a population of immunomodulatory leptin receptor-positive (LepR+) sympathetic perineurial barrier cells (SPCs) present in mice and humans, which uniquely co-express Lepr and interleukin-33 (Il33) and ensheath AT sympathetic axon bundles. Brown ATs (BATs) of mice lacking IL-33 in SPCs (SPCΔIl33) had fewer regulatory T (Treg) cells and eosinophils, resulting in increased BAT inflammation. SPCΔIl33 mice were more susceptible to diet-induced obesity, independently of food intake. Furthermore, SPCΔIl33 mice had impaired adaptive thermogenesis and were unresponsive to leptin-induced rescue of metabolic adaptation. We therefore identify LepR+ SPCs as a source of IL-33, which orchestrate an anti-inflammatory BAT environment, preserving sympathetic-mediated thermogenesis and body weight homeostasis. LepR+IL-33+ SPCs provide a cellular link between leptin and immune regulation of body weight, unifying neuroendocrinology and immunometabolism as previously disconnected fields of obesity research.
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Affiliation(s)
- Emma R Haberman
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, UK
| | - Gitalee Sarker
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, UK
| | - Bernardo A Arús
- Instituto Gulbenkian de Ciência, Oeiras, Portugal; Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Dresden, Germany
| | - Karin A Ziegler
- Institute of Pharmacology and Toxicology, Technical University Munich (TUM), Munich, Germany; DZHK (German Centre for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
| | - Sandro Meunier
- Institute of Pharmacology and Toxicology, Technical University Munich (TUM), Munich, Germany; DZHK (German Centre for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
| | - Noelia Martínez-Sánchez
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, UK; Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Eliška Freibergerová
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, UK
| | | | - Iara Fernández-González
- Neurobesity Group, Department of Physiology, Center for Research in Molecular Medicine and Chronic Diseases (CiMUS), Universidade de Santiago de Compostela, Santiago, Spain
| | - Chloe Zentai
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, UK
| | - Conan J O O'Brien
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, UK
| | - David E Grainger
- Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | | | - Svetoslav Chakarov
- Singapore Immunology Network (SIgN), A(∗)STAR, Singapore, Singapore; Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | | | - Matteo Iannacone
- Vita-Salute San Raffaele University, Milan, Italy; Division of Immunology, Transplantation and Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Stefan Engelhardt
- Institute of Pharmacology and Toxicology, Technical University Munich (TUM), Munich, Germany; DZHK (German Centre for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
| | - Miguel López
- Neurobesity Group, Department of Physiology, Center for Research in Molecular Medicine and Chronic Diseases (CiMUS), Universidade de Santiago de Compostela, Santiago, Spain
| | - Florent Ginhoux
- Singapore Immunology Network (SIgN), A(∗)STAR, Singapore, Singapore; Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Ana I Domingos
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, UK.
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19
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Silva RCMC, Travassos LH, Dutra FF. The dichotomic role of single cytokines: Fine-tuning immune responses. Cytokine 2024; 173:156408. [PMID: 37925788 DOI: 10.1016/j.cyto.2023.156408] [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: 10/03/2023] [Revised: 10/19/2023] [Accepted: 10/23/2023] [Indexed: 11/07/2023]
Abstract
Cytokines are known for their pleiotropic effects. They can be classified by their function as pro-inflammatory, such as tumor necrosis factor (TNF), interleukin (IL) 1 and IL-12, or anti-inflammatory, like IL-10, IL-35 and transforming growth factor β (TGF-β). Though this type of classification is an important simplification for the understanding of the general cytokine's role, it can be misleading. Here, we discuss recent studies that show a dichotomic role of the so-called pro and anti-inflammatory cytokines, highlighting that their function can be dependent on the microenvironment and their concentrations. Furthermore, we discuss how the back-and-forth interplay between cytokines and immunometabolism can influence the dichotomic role of inflammatory responses as an important target to complement cytokine-based therapies.
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Affiliation(s)
| | - Leonardo Holanda Travassos
- Laboratório de Receptores e Sinalização intracelular, Instituto de Biofísica Carlos Chagas Filho, UFRJ, Rio de Janeiro, Brazil
| | - Fabianno Ferreira Dutra
- Laboratório de Imunologia e Inflamação, Instituto de Microbiologia Paulo de Góes, UFRJ, Rio de Janeiro, Brazil
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20
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Popa AD, Niță O, Caba L, Gherasim A, Graur M, Mihalache L, Arhire LI. From the Sun to the Cell: Examining Obesity through the Lens of Vitamin D and Inflammation. Metabolites 2023; 14:4. [PMID: 38276294 PMCID: PMC10820276 DOI: 10.3390/metabo14010004] [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: 11/16/2023] [Revised: 12/12/2023] [Accepted: 12/18/2023] [Indexed: 01/27/2024] Open
Abstract
Obesity affects more than one billion people worldwide and often leads to cardiometabolic chronic comorbidities. It induces senescence-related alterations in adipose tissue, and senescence is closely linked to obesity. Fully elucidating the pathways through which vitamin D exerts anti-inflammatory effects may improve our understanding of local adipose tissue inflammation and the pathogenesis of metabolic disorders. In this narrative review, we compiled and analyzed the literature from diverse academic sources, focusing on recent developments to provide a comprehensive overview of the effect of vitamin D on inflammation associated with obesity and senescence. The article reveals that the activation of the NF-κB (nuclear factor kappa B subunit 1) and NLRP3 inflammasome (nucleotide-binding domain, leucine-rich-containing, pyrin domain-containing-3) pathways through the toll-like receptors, which increases oxidative stress and cytokine release, is a common mechanism underlying inflammation associated with obesity and senescence, and it discusses the potential beneficial effect of vitamin D in alleviating the development of subclinical inflammation. Investigating the main target cells and pathways of vitamin D action in adipose tissue could help uncover complex mechanisms of obesity and cellular senescence. This review summarizes significant findings related to opportunities for improving metabolic health.
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Affiliation(s)
- Alina Delia Popa
- Faculty of Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, 700115 Iasi, Romania; (A.D.P.); (A.G.); (L.M.); (L.I.A.)
| | - Otilia Niță
- Faculty of Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, 700115 Iasi, Romania; (A.D.P.); (A.G.); (L.M.); (L.I.A.)
| | - Lavinia Caba
- Faculty of Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, 700115 Iasi, Romania; (A.D.P.); (A.G.); (L.M.); (L.I.A.)
| | - Andreea Gherasim
- Faculty of Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, 700115 Iasi, Romania; (A.D.P.); (A.G.); (L.M.); (L.I.A.)
| | - Mariana Graur
- Faculty of Medicine and Biological Sciences, University “Ștefan cel Mare” of Suceava, 720229 Suceava, Romania;
| | - Laura Mihalache
- Faculty of Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, 700115 Iasi, Romania; (A.D.P.); (A.G.); (L.M.); (L.I.A.)
| | - Lidia Iuliana Arhire
- Faculty of Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, 700115 Iasi, Romania; (A.D.P.); (A.G.); (L.M.); (L.I.A.)
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21
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Hu Y, Chakarov S. Eosinophils in obesity and obesity-associated disorders. DISCOVERY IMMUNOLOGY 2023; 2:kyad022. [PMID: 38567054 PMCID: PMC10917198 DOI: 10.1093/discim/kyad022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 10/18/2023] [Accepted: 11/10/2023] [Indexed: 04/04/2024]
Abstract
Despite the rising prevalence and costs for the society, obesity etiology, and its precise cellular and molecular mechanisms are still insufficiently understood. The excessive accumulation of fat by adipocytes plays a key role in obesity progression and has many repercussions on total body physiology. In recent years the immune system as a gatekeeper of adipose tissue homeostasis has been evidenced and has become a focal point of research. Herein we focus on eosinophils, an important component of type 2 immunity, assuming fundamental, yet ill-defined, roles in the genesis, and progression of obesity and related metabolic disorders. We summarize eosinophilopoiesis and eosinophils recruitment into adipose tissue and discuss how the adipose tissue environments shape their function and vice versa. Finally, we also detail how obesity transforms the local eosinophil niche. Understanding eosinophil crosstalk with the diverse cell types within the adipose tissue environment will allow us to framework the therapeutic potential of eosinophils in obesity.
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Affiliation(s)
- Yanan Hu
- Shanghai Institute of Immunology, Shanghai JiaoTong University School of Medicine, 280 South Chongqing Road, Shanghai, China
| | - Svetoslav Chakarov
- Shanghai Institute of Immunology, Shanghai JiaoTong University School of Medicine, 280 South Chongqing Road, Shanghai, China
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22
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Maes B, Fayazpour F, Catrysse L, Lornet G, Van De Velde E, De Wolf C, De Prijck S, Van Moorleghem J, Vanheerswynghels M, Deswarte K, Descamps B, Vanhove C, Van der Schueren B, Vangoitsenhoven R, Hammad H, Janssens S, Lambrecht BN. STE20 kinase TAOK3 regulates type 2 immunity and metabolism in obesity. J Exp Med 2023; 220:e20210788. [PMID: 37347461 PMCID: PMC10287548 DOI: 10.1084/jem.20210788] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 03/31/2023] [Accepted: 06/02/2023] [Indexed: 06/23/2023] Open
Abstract
Healthy adipose tissue (AT) contains ST2+ Tregs, ILC2s, and alternatively activated macrophages that are lost in mice or humans on high caloric diet. Understanding how this form of type 2 immunity is regulated could improve treatment of obesity. The STE20 kinase Thousand And One amino acid Kinase-3 (TAOK3) has been linked to obesity in mice and humans, but its precise function is unknown. We found that ST2+ Tregs are upregulated in visceral epididymal white AT (eWAT) of Taok3-/- mice, dependent on IL-33 and the kinase activity of TAOK3. Upon high fat diet feeding, metabolic dysfunction was attenuated in Taok3-/- mice. ST2+ Tregs disappeared from eWAT in obese wild-type mice, but this was not the case in Taok3-/- mice. Mechanistically, AT Taok3-/- Tregs were intrinsically more responsive to IL-33, through higher expression of ST2, and expressed more PPARγ and type 2 cytokines. Thus, TAOK3 inhibits adipose tissue Tregs and regulates immunometabolism under excessive caloric intake.
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Affiliation(s)
- Bastiaan Maes
- Laboratory of Immunoregulation and Mucosal Immunology, VIB-UGent Center for Inflammation Research, Ghent, Belgium
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
- Laboratory for Endoplasmic Reticulum Stress and Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium
| | - Farzaneh Fayazpour
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
- Laboratory for Endoplasmic Reticulum Stress and Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium
| | - Leen Catrysse
- Cellular and Molecular (Patho)Physiology, VIB-UGent Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Guillaume Lornet
- Laboratory of Immunoregulation and Mucosal Immunology, VIB-UGent Center for Inflammation Research, Ghent, Belgium
| | - Evelien Van De Velde
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
- Laboratory for Endoplasmic Reticulum Stress and Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium
| | - Caroline De Wolf
- Laboratory of Immunoregulation and Mucosal Immunology, VIB-UGent Center for Inflammation Research, Ghent, Belgium
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
| | - Sofie De Prijck
- Laboratory of Immunoregulation and Mucosal Immunology, VIB-UGent Center for Inflammation Research, Ghent, Belgium
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
| | - Justine Van Moorleghem
- Laboratory of Immunoregulation and Mucosal Immunology, VIB-UGent Center for Inflammation Research, Ghent, Belgium
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
| | - Manon Vanheerswynghels
- Laboratory of Immunoregulation and Mucosal Immunology, VIB-UGent Center for Inflammation Research, Ghent, Belgium
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
| | - Kim Deswarte
- Laboratory of Immunoregulation and Mucosal Immunology, VIB-UGent Center for Inflammation Research, Ghent, Belgium
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
| | - Benedicte Descamps
- Department of Electronics and Information Systems, IBiTech-MEDISIP-Infinity Lab, Ghent University, Ghent, Belgium
| | - Christian Vanhove
- Department of Electronics and Information Systems, IBiTech-MEDISIP-Infinity Lab, Ghent University, Ghent, Belgium
| | - Bart Van der Schueren
- Department of Chronic Diseases and Metabolism, Clinical and Experimental Endocrinology, KU Leuven, Leuven, Belgium
- Department of Endocrinology, University Hospitals Leuven, Leuven, Belgium
| | - Roman Vangoitsenhoven
- Department of Chronic Diseases and Metabolism, Clinical and Experimental Endocrinology, KU Leuven, Leuven, Belgium
- Department of Endocrinology, University Hospitals Leuven, Leuven, Belgium
| | - Hamida Hammad
- Laboratory of Immunoregulation and Mucosal Immunology, VIB-UGent Center for Inflammation Research, Ghent, Belgium
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
| | - Sophie Janssens
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
- Laboratory for Endoplasmic Reticulum Stress and Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium
| | - Bart N. Lambrecht
- Laboratory of Immunoregulation and Mucosal Immunology, VIB-UGent Center for Inflammation Research, Ghent, Belgium
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
- Department of Pulmonary Medicine, Erasmus University Medical Center Rotterdam, Rotterdam Netherlands
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23
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Lee AH, Sugiura Y, Youm YH, Dlugos T, Maeda R, Coman D, Spadaro O, Sidorov S, Shchukina I, Andhey S, Smith SR, Ravussin E, Hyder F, Artyomov MN, Dixit VD. [WITHDRAWN] Activation of transsulfuration pathway to maintain cysteine is a thermogenic checkpoint for the conservation of energy. RESEARCH SQUARE 2023:rs.3.rs-3069713. [PMID: 37461682 PMCID: PMC10350108 DOI: 10.21203/rs.3.rs-3069713/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/24/2023]
Abstract
The authors have requested that this preprint be removed from Research Square.
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Affiliation(s)
- Aileen H. Lee
- Department of Pathology
- Department of Comparative Medicine
- Department of Immunobiology, Yale School of Medicine, New
Haven, CT 06520, USA
| | | | - Yun-Hee Youm
- Department of Pathology
- Department of Comparative Medicine
- Department of Immunobiology, Yale School of Medicine, New
Haven, CT 06520, USA
| | - Tamara Dlugos
- Department of Pathology
- Department of Comparative Medicine
- Department of Immunobiology, Yale School of Medicine, New
Haven, CT 06520, USA
| | | | - Daniel Coman
- Department of Radiology and Biomedical Imaging
- Department of Biomedical Engineering, School of Engineering
and Applied Science, Yale University
| | - Olga Spadaro
- Department of Pathology
- Department of Comparative Medicine
- Department of Immunobiology, Yale School of Medicine, New
Haven, CT 06520, USA
| | - Sviatoslav Sidorov
- Department of Pathology
- Department of Comparative Medicine
- Department of Immunobiology, Yale School of Medicine, New
Haven, CT 06520, USA
| | - Irina Shchukina
- Department of Pathology and Immunology Washington
University School of Medicine, St. Louis, MO 63110, USA
| | - Sairam Andhey
- Department of Pathology and Immunology Washington
University School of Medicine, St. Louis, MO 63110, USA
| | - Steven R. Smith
- Translational Research Institute for Metabolism and
Diabetes, AdventHealth, Orlando, FL, USA
| | - Eric Ravussin
- Pennington Biomedical Research Center, Baton Rouge, LA,
USA
| | - Fahmeed Hyder
- Department of Radiology and Biomedical Imaging
- Department of Biomedical Engineering, School of Engineering
and Applied Science, Yale University
| | - Maxim N. Artyomov
- Department of Pathology and Immunology Washington
University School of Medicine, St. Louis, MO 63110, USA
| | - Vishwa Deep Dixit
- Department of Pathology
- Department of Comparative Medicine
- Department of Immunobiology, Yale School of Medicine, New
Haven, CT 06520, USA
- Yale Center for Research on Aging, Yale School of
Medicine, New Haven, CT 06520, USA
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24
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Li JH, Hepworth MR, O'Sullivan TE. Regulation of systemic metabolism by tissue-resident immune cell circuits. Immunity 2023; 56:1168-1186. [PMID: 37315533 PMCID: PMC10321269 DOI: 10.1016/j.immuni.2023.05.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/11/2023] [Accepted: 05/02/2023] [Indexed: 06/16/2023]
Abstract
Recent studies have demonstrated that tissue homeostasis and metabolic function are dependent on distinct tissue-resident immune cells that form functional cell circuits with structural cells. Within these cell circuits, immune cells integrate cues from dietary contents and commensal microbes in addition to endocrine and neuronal signals present in the tissue microenvironment to regulate structural cell metabolism. These tissue-resident immune circuits can become dysregulated during inflammation and dietary overnutrition, contributing to metabolic diseases. Here, we review the evidence describing key cellular networks within and between the liver, gastrointestinal tract, and adipose tissue that control systemic metabolism and how these cell circuits become dysregulated during certain metabolic diseases. We also identify open questions in the field that have the potential to enhance our understanding of metabolic health and disease.
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Affiliation(s)
- Joey H Li
- Department of Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine at UCLA, Los Angeles, CA 900953, USA; Medical Scientist Training Program, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Matthew R Hepworth
- Division of Immunology, Immunity to Infection and Respiratory Medicine, Faculty of Biology, Medicine and Health, Manchester Collaborative Centre for Inflammation Research, Lydia Becker Institute of Immunology and Inflammation, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
| | - Timothy E O'Sullivan
- Department of Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine at UCLA, Los Angeles, CA 900953, USA.
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25
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Chen YR, Xiao F, Tang HN, Wang T, Zhou YH, Iqbal J, Yang SB, Li L, Zhou H. Plasticity of adipose tissues in response to fasting and refeeding declines with aging in mice. Aging (Albany NY) 2023; 15:204734. [PMID: 37227808 DOI: 10.18632/aging.204734] [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: 09/20/2022] [Accepted: 05/10/2023] [Indexed: 05/27/2023]
Abstract
To explore the plasticity of adipose tissues, C57BL/6J mice at the age of 1 month, 3 months, and 15 months corresponding to adolescence, adulthood, and middle-aged transitional period, respectively, were fasted and refed subsequently at different times. Body adipose tissues ratio (BATR) was calculated, the morphology of adipose tissue and the area of adipocytes were observed by histological analysis, and the mitochondria in adipocytes were observed under the transmission electron microscope. Furthermore, the expression levels of Ucp-1, Cidea, Cox7a1, Cpt-1m, Atgl, and Hsl were detected by qRT-PCR. Our results showed a significant increase in the adipocytes area and body visceral adipose tissue (VAT) ratio in all groups of mice with aging. Moreover, body mesenteric white adipose tissue (mWAT) ratio decreased the most after 72 h fasting. In the middle-aged transitional mice, the white adipocytes did not decrease until 72 h fasting, and most of them still appeared as unaffected unilocular cells. Besides, the number of mitochondria and the expression of Ucp-1, Cidea, Cox7a1, Cpt-1m, Atgl and Hsl were lower in these mice. After 72h refeeding, the body subcutaneous white adipose tissue (sWAT) ratio returned to normal, while the VAT kept decreasing. The above results indicated an impairment in adipose tissue plasticity in mice with aging, suggesting that age modulated the metabolic adaptiveness of adipose tissues in mice.
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Affiliation(s)
- Ya-Ru Chen
- National Clinical Research Center for Metabolic Diseases, Hunan Provincial Key Laboratory for Metabolic Bone Diseases, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China
| | - Fen Xiao
- National Clinical Research Center for Metabolic Diseases, Hunan Provincial Key Laboratory for Metabolic Bone Diseases, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China
| | - Hao-Neng Tang
- National Clinical Research Center for Metabolic Diseases, Hunan Provincial Key Laboratory for Metabolic Bone Diseases, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China
- Department of Laboratory Medicine, The Second Xiangya Hospital, Central South University, Changsha 410011, Hunan, China
| | - Ting Wang
- National Clinical Research Center for Metabolic Diseases, Hunan Provincial Key Laboratory for Metabolic Bone Diseases, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China
| | - Ying-Hui Zhou
- National Clinical Research Center for Metabolic Diseases, Hunan Provincial Key Laboratory for Metabolic Bone Diseases, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China
| | - Junaid Iqbal
- National Clinical Research Center for Metabolic Diseases, Hunan Provincial Key Laboratory for Metabolic Bone Diseases, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China
| | - Shui-Bing Yang
- Department of Endocrinology, The First People's Hospital of Huaihua, Huaihua 418000, Hunan, China
| | - Long Li
- National Clinical Research Center for Metabolic Diseases, Hunan Provincial Key Laboratory for Metabolic Bone Diseases, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China
| | - Houde Zhou
- National Clinical Research Center for Metabolic Diseases, Hunan Provincial Key Laboratory for Metabolic Bone Diseases, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China
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26
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Ye J, Gao C, Liang Y, Hou Z, Shi Y, Wang Y. Characteristic and fate determination of adipose precursors during adipose tissue remodeling. CELL REGENERATION (LONDON, ENGLAND) 2023; 12:13. [PMID: 37138165 PMCID: PMC10156890 DOI: 10.1186/s13619-023-00157-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 12/30/2022] [Indexed: 05/05/2023]
Abstract
Adipose tissues are essential for actively regulating systemic energy balance, glucose homeostasis, immune responses, reproduction, and longevity. Adipocytes maintain dynamic metabolic needs and possess heterogeneity in energy storage and supply. Overexpansion of adipose tissue, especially the visceral type, is a high risk for diabetes and other metabolic diseases. Changes in adipocytes, hypertrophy or hyperplasia, contribute to the remodeling of obese adipose tissues, accompanied by abundant immune cell accumulation, decreased angiogenesis, and aberrant extracellular matrix deposition. The process and mechanism of adipogenesis are well known, however, adipose precursors and their fate decision are only being defined with recent information available to decipher how adipose tissues generate, maintain, and remodel. Here, we discuss the key findings that identify adipose precursors phenotypically, with special emphasis on the intrinsic and extrinsic signals in instructing and regulating the fate of adipose precursors under pathophysiological conditions. We hope that the information in this review lead to novel therapeutic strategies to combat obesity and related metabolic diseases.
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Affiliation(s)
- Jiayin Ye
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 320 Yueyang Road, Shanghai, 200031, China
| | - Cheng Gao
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 320 Yueyang Road, Shanghai, 200031, China
| | - Yong Liang
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 320 Yueyang Road, Shanghai, 200031, China
| | - Zongliu Hou
- Key Laboratory of Tumor Immunological Prevention and Treatment of Yunnan Province, Kunming, 650000, Yunnan, China
| | - Yufang Shi
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 320 Yueyang Road, Shanghai, 200031, China.
- The Third Affiliated Hospital of Soochow University and State Key Laboratory of Radiation Medicine and Protection, Institutes for Translational Medicine, Soochow University, 199 Renai Road, Suzhou, 215123, Jiangsu, China.
| | - Ying Wang
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 320 Yueyang Road, Shanghai, 200031, China.
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27
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Cheru N, Hafler DA, Sumida TS. Regulatory T cells in peripheral tissue tolerance and diseases. Front Immunol 2023; 14:1154575. [PMID: 37197653 PMCID: PMC10183596 DOI: 10.3389/fimmu.2023.1154575] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 04/13/2023] [Indexed: 05/19/2023] Open
Abstract
Maintenance of peripheral tolerance by CD4+Foxp3+ regulatory T cells (Tregs) is essential for regulating autoreactive T cells. The loss of function of Foxp3 leads to autoimmune disease in both animals and humans. An example is the rare, X-linked recessive disorder known as IPEX (Immune Dysregulation, Polyendocrinopathy, Enteropathy X-linked) syndrome. In more common human autoimmune diseases, defects in Treg function are accompanied with aberrant effector cytokines such as IFNγ. It has recently become appreciated that Tregs plays an important role in not only maintaining immune homeostasis but also in establishing the tissue microenvironment and homeostasis of non-lymphoid tissues. Tissue resident Tregs show profiles that are unique to their local environments which are composed of both immune and non-immune cells. Core tissue-residence gene signatures are shared across different tissue Tregs and are crucial to homeostatic regulation and maintaining the tissue Treg pool in a steady state. Through interaction with immunocytes and non-immunocytes, tissue Tregs exert a suppressive function via conventional ways involving contact dependent and independent processes. In addition, tissue resident Tregs communicate with other tissue resident cells which allows Tregs to adopt to their local microenvironment. These bidirectional interactions are dependent on the specific tissue environment. Here, we summarize the recent advancements of tissue Treg studies in both human and mice, and discuss the molecular mechanisms that maintain tissue homeostasis and prevent pathogenesis.
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Affiliation(s)
- Nardos Cheru
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, United States
| | - David A. Hafler
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, United States
- Department of Neurology, Yale School of Medicine, New Haven, CT, United States
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, United States
| | - Tomokazu S. Sumida
- Department of Neurology, Yale School of Medicine, New Haven, CT, United States
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Kabat AM, Pearce EL, Pearce EJ. Metabolism in type 2 immune responses. Immunity 2023; 56:723-741. [PMID: 37044062 PMCID: PMC10938369 DOI: 10.1016/j.immuni.2023.03.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/11/2023] [Accepted: 03/15/2023] [Indexed: 04/14/2023]
Abstract
The immune response is tailored to the environment in which it takes place. Immune cells sense and adapt to changes in their surroundings, and it is now appreciated that in addition to cytokines made by stromal and epithelial cells, metabolic cues provide key adaptation signals. Changes in immune cell activation states are linked to changes in cellular metabolism that support function. Furthermore, metabolites themselves can signal between as well as within cells. Here, we discuss recent progress in our understanding of how metabolic regulation relates to type 2 immunity firstly by considering specifics of metabolism within type 2 immune cells and secondly by stressing how type 2 immune cells are integrated more broadly into the metabolism of the organism as a whole.
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Affiliation(s)
- Agnieszka M Kabat
- Bloomberg Kimmel Institute, and Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Erika L Pearce
- Bloomberg Kimmel Institute, and Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Biochemistry and Molecular Biology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD 21287, USA
| | - Edward J Pearce
- Bloomberg Kimmel Institute, and Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Molecular Microbiology and Immunology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD 21287, USA.
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Molofsky AB, Locksley RM. The ins and outs of innate and adaptive type 2 immunity. Immunity 2023; 56:704-722. [PMID: 37044061 PMCID: PMC10120575 DOI: 10.1016/j.immuni.2023.03.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/16/2023] [Accepted: 03/17/2023] [Indexed: 04/14/2023]
Abstract
Type 2 immunity is orchestrated by a canonical group of cytokines primarily produced by innate lymphoid cells, group 2, and their adaptive counterparts, CD4+ helper type 2 cells, and elaborated by myeloid cells and antibodies that accumulate in response. Here, we review the cytokine and cellular circuits that mediate type 2 immunity. Building from insights in cytokine evolution, we propose that innate type 2 immunity evolved to monitor the status of microbe-rich epithelial barriers (outside) and sterile parenchymal borders (inside) to meet the functional demands of local tissue, and, when necessary, to relay information to the adaptive immune system to reinforce demarcating borders to sustain these efforts. Allergic pathology likely results from deviations in local sustaining units caused by alterations imposed by environmental effects during postnatal developmental windows and exacerbated by mutations that increase vulnerabilities. This framework positions T2 immunity as central to sustaining tissue repair and regeneration and provides a context toward understanding allergic disease.
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Affiliation(s)
- Ari B Molofsky
- Department of Lab Medicine, University of California, San Francisco, San Francisco, CA 94143-0451, USA
| | - Richard M Locksley
- Howard Hughes Medical Institute and Department of Medicine, University of California, San Francisco, San Francisco, CA 94143-0795, USA.
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30
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Zhao R, Shi Y, Liu N, Li B. Elevated levels of interleukin-33 are associated with asthma: A meta-analysis. Immun Inflamm Dis 2023; 11:e842. [PMID: 37102668 PMCID: PMC10116908 DOI: 10.1002/iid3.842] [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: 02/18/2023] [Revised: 03/27/2023] [Accepted: 04/07/2023] [Indexed: 04/28/2023] Open
Abstract
BACKGROUND Previous studies reported that patients with asthma showed higher levels of interleukin (IL)-33 in peripheral blood, compared to healthy control (HCs). However, we also noticed that there were no significant differences of IL-33 levels between controls and asthma patients in a recent study. We aim to conduct this meta-analysis and evaluate the feasibility of IL-33 in peripheral blood that may act as a promising biomarker in asthma. METHODS Articles published before December 2022 were searched in these databases (PubMed, Web of Science, EMBASE, and Google Scholar). We used STATA 12.0 software to compute the results. RESULTS The study showed that asthmatics showed higher IL-33 level in serum and plasma, compared to HCs (serum: standard mean difference [SMD] 2.06, 95% confidence interval [CI] 1.12-3.00, I2 = 98.4%, p < .001; plasma: SMD 3.67, 95% CI 2.32-5.03, I2 = 86.0%, p < .001). Subgroup analysis indicated that asthma adults showed higher IL-33 level in serum, compared to HCs, whereas no significant difference in IL-33 level in serum was showed between asthma children and HCs (adults: SMD 2.17, 95% CI 1.09-3.25; children: SMD 1.81, 95% CI -0.11 to 3.74). The study indicated that moderate and severe asthmatics showed higher IL-33 level in serum, compared to mild asthmatics (SMD 0.78, 95% CI 0.41-1.16, I2 = 66.2%, p = .011). CONCLUSIONS In conclusion, the main findings of present meta-analysis suggested that there was a significant correlation between IL-33 levels and the severity of asthma. Therefore, IL-33 levels of either serum or plasma may be regarded as a useful biomarker of asthma or the degree of disease.
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Affiliation(s)
- Ranran Zhao
- Department of Respiratory MedicineCapital Medical University Affiliated Beijing Friendship HospitalBeijingChina
| | - Yun Shi
- Medical and Health CenterCapital Medical University Affiliated Beijing Friendship HospitalBeijingChina
| | - Na Liu
- Department of Respiratory MedicineBeijing Hepingli hospitalBeijingChina
| | - Bin Li
- Department of Respiratory MedicineCapital Medical University Affiliated Beijing Friendship HospitalBeijingChina
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31
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Benvie AM, Lee D, Steiner BM, Xue S, Jiang Y, Berry DC. Age-dependent Pdgfrβ signaling drives adipocyte progenitor dysfunction to alter the beige adipogenic niche in male mice. Nat Commun 2023; 14:1806. [PMID: 37002214 PMCID: PMC10066302 DOI: 10.1038/s41467-023-37386-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 03/15/2023] [Indexed: 04/04/2023] Open
Abstract
Perivascular adipocyte progenitor cells (APCs) can generate cold temperature-induced thermogenic beige adipocytes within white adipose tissue (WAT), an effect that could counteract excess fat mass and metabolic pathologies. Yet, the ability to generate beige adipocytes declines with age, creating a key challenge for their therapeutic potential. Here we show that ageing beige APCs overexpress platelet derived growth factor receptor beta (Pdgfrβ) to prevent beige adipogenesis. We show that genetically deleting Pdgfrβ, in adult male mice, restores beige adipocyte generation whereas activating Pdgfrβ in juvenile mice blocks beige fat formation. Mechanistically, we find that Stat1 phosphorylation mediates Pdgfrβ beige APC signaling to suppress IL-33 induction, which dampens immunological genes such as IL-13 and IL-5. Moreover, pharmacologically targeting Pdgfrβ signaling restores beige adipocyte development by rejuvenating the immunological niche. Thus, targeting Pdgfrβ signaling could be a strategy to restore WAT immune cell function to stimulate beige fat in adult mammals.
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Affiliation(s)
- Abigail M Benvie
- Division of Nutritional Sciences, Cornell University, Ithaca, NY, 14853, USA
| | - Derek Lee
- Division of Nutritional Sciences, Cornell University, Ithaca, NY, 14853, USA
| | - Benjamin M Steiner
- Division of Nutritional Sciences, Cornell University, Ithaca, NY, 14853, USA
| | - Siwen Xue
- Division of Nutritional Sciences, Cornell University, Ithaca, NY, 14853, USA
| | - Yuwei Jiang
- Department of Physiology and Biophysics, University of Illinois at Chicago, Chicago, IL, 60612, USA
| | - Daniel C Berry
- Division of Nutritional Sciences, Cornell University, Ithaca, NY, 14853, USA.
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32
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Xue S, Lee D, Berry DC. Thermogenic adipose tissue in energy regulation and metabolic health. Front Endocrinol (Lausanne) 2023; 14:1150059. [PMID: 37020585 PMCID: PMC10067564 DOI: 10.3389/fendo.2023.1150059] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 03/07/2023] [Indexed: 04/07/2023] Open
Abstract
The ability to generate thermogenic fat could be a targeted therapy to thwart obesity and improve metabolic health. Brown and beige adipocytes are two types of thermogenic fat cells that regulate energy balance. Both adipocytes share common morphological, biochemical, and thermogenic properties. Yet, recent evidence suggests unique features exist between brown and beige adipocytes, such as their cellular origin and thermogenic regulatory processes. Beige adipocytes also appear highly plastic, responding to environmental stimuli and interconverting between beige and white adipocyte states. Additionally, beige adipocytes appear to be metabolically heterogenic and have substrate specificity. Nevertheless, obese and aged individuals cannot develop beige adipocytes in response to thermogenic fat-inducers, creating a key clinical hurdle to their therapeutic promise. Thus, elucidating the underlying developmental, molecular, and functional mechanisms that govern thermogenic fat cells will improve our understanding of systemic energy regulation and strive for new targeted therapies to generate thermogenic fat. This review will examine the recent advances in thermogenic fat biogenesis, molecular regulation, and the potential mechanisms for their failure.
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Affiliation(s)
| | | | - Daniel C. Berry
- Division of Nutritional Sciences, Cornell University, Ithaca, NY, United States
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33
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Abstract
When discovered in the early 2000s, interleukin-33 (IL-33) was characterized as a potent driver of type 2 immunity and implicated in parasite clearance, as well as asthma, allergy, and lung fibrosis. Yet research in other models has since revealed that IL-33 is a highly pleiotropic molecule with diverse functions. These activities are supported by elusive release mechanisms and diverse expression of the IL-33 receptor, STimulation 2 (ST2), on both immune and stromal cells. Interestingly, IL-33 also supports type 1 immune responses during viral and tumor immunity and after allogeneic hematopoietic stem cell transplantation. Yet the IL-33-ST2 axis is also critical to the establishment of systemic homeostasis and tissue repair and regeneration. Despite these recent findings, the mechanisms by which IL-33 governs the balance between immunity and homeostasis or can support both effective repair and pathogenic fibrosis are poorly understood. As such, ongoing research is trying to understand the potential reparative and regulatory versus pro-inflammatory and pro-fibrotic roles for IL-33 in transplantation. This review provides an overview of the emerging regenerative role of IL-33 in organ homeostasis and tissue repair as it relates to transplantation immunology. It also outlines the known impacts of IL-33 in commonly transplanted solid organs and covers the envisioned roles for IL-33 in ischemia-reperfusion injury, rejection, and tolerance. Finally, we give a comprehensive summary of its effects on different cell populations involved in these processes, including ST2 + regulatory T cells, innate lymphoid cell type 2, as well as significant myeloid cell populations.
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34
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Liu J, Zeng D, Luo J, Wang H, Xiong J, Chen X, Chen T, Sun J, Xi Q, Zhang Y. LPS-Induced Inhibition of miR-143 Expression in Brown Adipocytes Promotes Thermogenesis and Fever. Int J Mol Sci 2022; 23:13805. [PMID: 36430282 PMCID: PMC9696956 DOI: 10.3390/ijms232213805] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 10/28/2022] [Accepted: 11/04/2022] [Indexed: 11/11/2022] Open
Abstract
Fever is an important part of inflammatory response to infection. Although brown adipose tissue (BAT) thermogenesis is known to be potently influenced by systemic inflammation, the role of BAT during infection-induced fever remains largely unknown. Here, we injected mice with a low dose of LPS and found that low-dose LPS can directly induce thermogenesis of brown adipocytes. It is known that miR-143 is highly expressed in the BAT, and miR-143 knockout mice exhibited stronger thermogenesis under cold exposure. Interestingly, miR-143 was negatively correlated with an LPS-induced increase of TNFα and IL-6 mRNA levels, and the IL-6 pathway may mediate the inhibition of miR-143 expression. Moreover, miR-143 is down-regulated by LPS, and overexpression of miR-143 in brown adipocytes by lentivirus could rescue the enhancement of UCP1 protein expression caused by LPS, hinting miR-143 may be an important regulator of the thermogenesis in brown adipocytes. More importantly, the knockout of miR-143 further enhanced the LPS-induced increase of body temperature and BAT thermogenesis, and this result was further confirmed by in vitro experiments by using primary brown adipocytes. Mechanistically, adenylate cyclase 9 (AC9) is a new target gene of miR-143 and LPS increases BAT thermogenesis by a way of inhibiting miR-143 expression, a negative regulator for AC9. Our study considerably improves our collective understanding of the important function of miR-143 in inflammatory BAT thermogenesis.
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Affiliation(s)
- Jie Liu
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Dewei Zeng
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Junyi Luo
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Huan Wang
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Jiali Xiong
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Xingping Chen
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
- Jiangxi Province Key Laboratory of Animal Nutrition, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China
| | - Ting Chen
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Jiajie Sun
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Qianyun Xi
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Yongliang Zhang
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
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Xiong L, Nutt SL, Seillet C. Innate lymphoid cells: More than just immune cells. Front Immunol 2022; 13:1033904. [PMID: 36389661 PMCID: PMC9643152 DOI: 10.3389/fimmu.2022.1033904] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 10/10/2022] [Indexed: 11/21/2022] Open
Abstract
Since their discovery, innate lymphoid cells (ILCs) have been described as the innate counterpart of the T cells. Indeed, ILCs and T cells share many features including their common progenitors, transcriptional regulation, and effector cytokine secretion. Several studies have shown complementary and redundant roles for ILCs and T cells, leaving open questions regarding why these cells would have been evolutionarily conserved. It has become apparent in the last decade that ILCs, and rare immune cells more generally, that reside in non-lymphoid tissue have non-canonical functions for immune cells that contribute to tissue homeostasis and function. Viewed through this lens, ILCs would not be just the innate counterpart of T cells, but instead act as a link between sensory cells that monitor any changes in the environment that are not necessarily pathogenic and instruct effector cells that act to maintain body homeostasis. As these non-canonical functions of immune cells are operating in absence of pathogenic signals, it opens great avenues of research for immunologists that they now need to identify the physiological cues that regulate these cells and how the process confers a finer level of control and a greater flexibility that enables the organism to adapt to changing environmental conditions. In the review, we highlight how ILCs participate in the physiologic function of the tissue in which they reside and how physiological cues, in particular neural inputs control their homeostatic activity.
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Affiliation(s)
- Le Xiong
- Immunology Division, Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia
- Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Stephen L. Nutt
- Immunology Division, Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia
- Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Cyril Seillet
- Immunology Division, Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia
- Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
- *Correspondence: Cyril Seillet,
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36
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Wang G, Song A, Bae M, Wang QA. Adipose Tissue Plasticity in Aging. Compr Physiol 2022; 12:4119-4132. [PMID: 36214190 DOI: 10.1002/cphy.c220005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
As a dynamic endocrine organ, white adipose tissue (WAT) stores lipids and plays a critical role in maintaining whole-body energy homeostasis and insulin sensitivity. A large group of the population over 65 years old suffer from increased WAT mass, especially in the visceral location. Visceral adiposity accelerates aging through promoting age-associated chronic conditions, significantly shortening life expectancy. Unlike WAT, brown adipose tissue (BAT) functions as an effective energy sink that burns and disposes of excess lipids and glucose upon activation of thermogenesis. Unfortunately, the thermogenic activity of BAT declines during aging. New appreciation of cellular and functional remodeling of WAT and BAT during aging has emerged in recent years. Efforts are underway to explore the potential underlying mechanisms behind these age-associated alterations in WAT and BAT and the impact of these alterations on whole-body metabolism. Lastly, it is intriguing to translate our knowledge obtained from animal models to the clinic to prevent and treat age-associated metabolic disorders. © 2022 American Physiological Society. Compr Physiol 12: 4119-4132, 2022.
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Affiliation(s)
- Guan Wang
- Department of Molecular & Cellular Endocrinology, Arthur Riggs Diabetes and Metabolism Research Institute, City of Hope Medical Center, Duarte, California, USA
| | - Anying Song
- Department of Molecular & Cellular Endocrinology, Arthur Riggs Diabetes and Metabolism Research Institute, City of Hope Medical Center, Duarte, California, USA
| | - Marie Bae
- Department of Molecular & Cellular Endocrinology, Arthur Riggs Diabetes and Metabolism Research Institute, City of Hope Medical Center, Duarte, California, USA
| | - Qiong A Wang
- Department of Molecular & Cellular Endocrinology, Arthur Riggs Diabetes and Metabolism Research Institute, City of Hope Medical Center, Duarte, California, USA.,Comprehensive Cancer Center, Beckman Research Institute, City of Hope Medical Center, Duarte, California, USA
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37
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Silva GDN, Amato AA. Thermogenic adipose tissue aging: Mechanisms and implications. Front Cell Dev Biol 2022; 10:955612. [PMID: 35979379 PMCID: PMC9376969 DOI: 10.3389/fcell.2022.955612] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Accepted: 07/04/2022] [Indexed: 12/27/2022] Open
Abstract
Adipose tissue undergoes significant anatomical and functional changes with aging, leading to an increased risk of metabolic diseases. Age-related changes in adipose tissue include overall defective adipogenesis, dysfunctional adipokine secretion, inflammation, and impaired ability to produce heat by nonshivering thermogenesis. Thermogenesis in adipose tissue is accomplished by brown and beige adipocytes, which also play a role in regulating energy homeostasis. Brown adipocytes develop prenatally, are found in dedicated depots, and involute in early infancy in humans. In contrast, beige adipocytes arise postnatally in white adipose tissue and persist throughout life, despite being lost with aging. In recent years, there have been significant advances in the understanding of age-related reduction in thermogenic adipocyte mass and function. Mechanisms underlying such changes are beginning to be delineated. They comprise diminished adipose precursor cell pool size and adipogenic potential, mitochondrial dysfunction, decreased sympathetic signaling, and altered paracrine and endocrine signals. This review presents current evidence from animal models and human studies for the mechanisms underlying thermogenic adipocyte loss and discusses potential strategies targeting brown and beige adipocytes to increase health span and longevity.
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Abstract
Ageing leads to profound alterations in the immune system and increases susceptibility to some chronic, infectious and autoimmune diseases. In recent years, widespread application of single-cell techniques has enabled substantial progress in our understanding of the ageing immune system. These comprehensive approaches have expanded and detailed the current views of ageing and immunity. Here we review a body of recent studies that explored how the immune system ages using unbiased profiling techniques at single-cell resolution. Specifically, we discuss an emergent understanding of age-related alterations in innate and adaptive immune cell populations, antigen receptor repertoires and immune cell-supporting microenvironments of the peripheral tissues. Focusing on the results obtained in mice and humans, we describe the multidimensional data that align with established concepts of immune ageing as well as novel insights emerging from these studies. We further discuss outstanding questions in the field and highlight techniques that will advance our understanding of immune ageing in the future.
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Affiliation(s)
- Denis A Mogilenko
- Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, MO, USA
| | - Irina Shchukina
- Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, MO, USA
| | - Maxim N Artyomov
- Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, MO, USA.
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Lecoutre S, Lambert M, Drygalski K, Dugail I, Maqdasy S, Hautefeuille M, Clément K. Importance of the Microenvironment and Mechanosensing in Adipose Tissue Biology. Cells 2022; 11:cells11152310. [PMID: 35954152 PMCID: PMC9367348 DOI: 10.3390/cells11152310] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 07/19/2022] [Accepted: 07/23/2022] [Indexed: 11/16/2022] Open
Abstract
The expansion of adipose tissue is an adaptive mechanism that increases nutrient buffering capacity in response to an overall positive energy balance. Over the course of expansion, the adipose microenvironment undergoes continual remodeling to maintain its structural and functional integrity. However, in the long run, adipose tissue remodeling, typically characterized by adipocyte hypertrophy, immune cells infiltration, fibrosis and changes in vascular architecture, generates mechanical stress on adipose cells. This mechanical stimulus is then transduced into a biochemical signal that alters adipose function through mechanotransduction. In this review, we describe the physical changes occurring during adipose tissue remodeling, and how they regulate adipose cell physiology and promote obesity-associated dysfunction in adipose tissue.
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Affiliation(s)
- Simon Lecoutre
- Nutrition and Obesities: Systemic Approaches Research Group (Nutri-Omics), Sorbonne Université, INSERM, F-75013 Paris, France; (S.L.); (K.D.); (I.D.)
| | - Mélanie Lambert
- Labex Inflamex, Université Sorbonne Paris Nord, INSERM, F-93000 Bobigny, France;
| | - Krzysztof Drygalski
- Nutrition and Obesities: Systemic Approaches Research Group (Nutri-Omics), Sorbonne Université, INSERM, F-75013 Paris, France; (S.L.); (K.D.); (I.D.)
| | - Isabelle Dugail
- Nutrition and Obesities: Systemic Approaches Research Group (Nutri-Omics), Sorbonne Université, INSERM, F-75013 Paris, France; (S.L.); (K.D.); (I.D.)
| | - Salwan Maqdasy
- Department of Medicine (H7), Karolinska Institutet Hospital, C2-94, 14186 Stockholm, Sweden;
| | - Mathieu Hautefeuille
- Laboratoire de Biologie du Développement (UMR 7622), IBPS, Sorbonne Université, F-75005 Paris, France;
| | - Karine Clément
- Nutrition and Obesities: Systemic Approaches Research Group (Nutri-Omics), Sorbonne Université, INSERM, F-75013 Paris, France; (S.L.); (K.D.); (I.D.)
- Assistance Publique Hôpitaux de Paris, Nutrition Department, CRNH Ile-de-France, Pitié-Salpêtrière Hospital, F-75013 Paris, France
- Correspondence: or
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Surace L, Di Santo JP. Local and systemic features of ILC immunometabolism. Curr Opin Hematol 2022; 29:209-217. [PMID: 35787549 DOI: 10.1097/moh.0000000000000722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW Innate lymphoid cells (ILCs) are specialized immune cells that rapidly sense environmental perturbations and regulate immune responses and tissue homeostasis. ILCs are mainly tissue resident and their crosstalk within tissue microenvironments influences both local and systemic metabolism. Reciprocally, metabolic status conditions ILC phenotype and effector function. In this review, we discuss the role of ILCs as metabolic sentinels and describe how ILC subset-specific activities influence homeostasis and disease. Finally, we highlight emerging challenges in the field of ILC immunometabolism. RECENT FINDINGS Accumulating evidence suggests that ILCs metabolism, phenotype, and function are shaped by signals from the tissue microenvironment. Dietary, endogenous, and microbial metabolites are sensed by ILC subsets and can impact on ILC-mediated immune responses. Recent studies have found that mitochondria are central regulators of ILC effector function. Furthermore, ILCs have emerged as crucial sensors of metabolic stress, suggesting they might act as metabolic sentinels, coordinating tissue and host metabolism. SUMMARY Our understanding how ILCs mechanistically regulate host metabolism and defenses is still incomplete. Unraveling critical metabolic features of ILCs may lead to novel therapeutic strategies that target these cells in the context of disease.
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Affiliation(s)
- Laura Surace
- Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, , Bonn, Germany
| | - James P Di Santo
- Institut Pasteur, Université Paris Cité, Inserm, Paris, France
- Innate Immunity Unit, Institut Pasteur, Université Paris Cité, Inserm U1223, Paris, France
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Misawa T, Wagner M, Koyasu S. ILC2s and Adipose Tissue Homeostasis: Progress to Date and the Road Ahead. Front Immunol 2022; 13:876029. [PMID: 35784368 PMCID: PMC9243262 DOI: 10.3389/fimmu.2022.876029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 05/04/2022] [Indexed: 11/14/2022] Open
Abstract
Group 2 innate lymphoid cells (ILC2s) were initially identified as a new type of lymphocytes that produce vigorous amounts of type 2 cytokines in adipose tissue. Subsequent studies revealed that ILC2s are present not only in adipose tissue but also in various other tissues such as lung and skin. ILC2s are generally recognized as tissue-resident immune cells that regulate tissue homeostasis. ILC2s express receptors for various humoral factors and thus can change their functions or distribution depending on the environment and circumstances. In this review, we will outline our recent understanding of ILC2 biology and discuss future directions for ILC2 research, particularly in adipose tissue and metabolic homeostasis.
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Affiliation(s)
- Takuma Misawa
- Laboratory for Immune Cell Systems, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Marek Wagner
- Laboratory for Immune Cell Systems, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
- Department of Biomedicine, University of Bergen, Bergen, Norway
| | - Shigeo Koyasu
- Laboratory for Immune Cell Systems, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
- *Correspondence: Shigeo Koyasu,
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42
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IL-33–ILC2 axis in the female reproductive tract. Trends Mol Med 2022; 28:569-582. [DOI: 10.1016/j.molmed.2022.04.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/11/2022] [Accepted: 04/12/2022] [Indexed: 02/06/2023]
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43
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Ou MY, Zhang H, Tan PC, Zhou SB, Li QF. Adipose tissue aging: mechanisms and therapeutic implications. Cell Death Dis 2022; 13:300. [PMID: 35379822 PMCID: PMC8980023 DOI: 10.1038/s41419-022-04752-6] [Citation(s) in RCA: 75] [Impact Index Per Article: 37.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 03/03/2022] [Accepted: 03/18/2022] [Indexed: 01/10/2023]
Abstract
Adipose tissue, which is the crucial energy reservoir and endocrine organ for the maintenance of systemic glucose, lipid, and energy homeostasis, undergoes significant changes during aging. These changes cause physiological declines and age-related disease in the elderly population. Here, we review the age-related changes in adipose tissue at multiple levels and highlight the underlying mechanisms regulating the aging process. We also discuss the pathogenic pathways of age-related fat dysfunctions and their systemic negative consequences, such as dyslipidemia, chronic general inflammation, insulin resistance, and type 2 diabetes (T2D). Age-related changes in adipose tissue involve redistribution of deposits and composition, in parallel with the functional decline of adipocyte progenitors and accumulation of senescent cells. Multiple pathogenic pathways induce defective adipogenesis, inflammation, aberrant adipocytokine production, and insulin resistance, leading to adipose tissue dysfunction. Changes in gene expression and extracellular signaling molecules regulate the aging process of adipose tissue through various pathways. In addition, adipose tissue aging impacts other organs that are infiltrated by lipids, which leads to systemic inflammation, metabolic system disruption, and aging process acceleration. Moreover, studies have indicated that adipose aging is an early onset event in aging and a potential target to extend lifespan. Together, we suggest that adipose tissue plays a key role in the aging process and is a therapeutic target for the treatment of age-related disease, which deserves further study to advance relevant knowledge.
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Affiliation(s)
- Min-Yi Ou
- Department of Plastic & Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 200011, Shanghai, China
| | - Hao Zhang
- Department of Plastic & Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 200011, Shanghai, China
| | - Poh-Ching Tan
- Department of Plastic & Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 200011, Shanghai, China
| | - Shuang-Bai Zhou
- Department of Plastic & Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 200011, Shanghai, China.
| | - Qing-Feng Li
- Department of Plastic & Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 200011, Shanghai, China.
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Ricardo-Gonzalez RR, Molofsky AB, Locksley RM. ILC2s - development, divergence, dispersal. Curr Opin Immunol 2022; 75:102168. [PMID: 35176675 PMCID: PMC9131705 DOI: 10.1016/j.coi.2022.102168] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Revised: 01/24/2022] [Accepted: 01/27/2022] [Indexed: 12/15/2022]
Abstract
Over the last decade, we have come to appreciate group 2 innate lymphoid cells (ILC2s) as important players in host and tissue immunity. New studies of ILC2s and their precursors using novel reporter mice, advanced microscopy, and multi-omics approaches have expanded our knowledge on how these cells contribute to tissue physiology and function. This review highlights recent literature on this enigmatic cell, and we organize our discussion across three important paradigms in ILC2 biology: development, divergence, and dispersal. In addition, we frame our discussion in the context of other innate and adaptive immune cells to emphasize the relevance of expanding knowledge of ILC2s and tissue immunity.
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Affiliation(s)
- Roberto R Ricardo-Gonzalez
- Department of Dermatology, University of California San Francisco, San Francisco, CA, USA; Department of Microbiology & Immunology, University of California San Francisco, San Francisco, CA, USA
| | - Ari B Molofsky
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA; Diabetes Center, University of California San Francisco, San Francisco, CA, USA
| | - Richard M Locksley
- Department of Microbiology & Immunology, University of California San Francisco, San Francisco, CA, USA; Department of Medicine, University of California San Francisco, San Francisco, CA, USA; Howard Hughes Medical Institute, University of California San Francisco, San Francisco, CA, USA.
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Abstract
PURPOSE OF REVIEW Lymphatic vessels are found in most tissues, with the exception of the cornea and the central nervous system. Tissues that have high exposure to antigens, such as the skin and the intestine, have especially extensive lymphatic vascular networks. Despite being densely vascularized with blood vessels, adipose tissue is poorly permeated with lymphatic vasculature. Here, we focus on the recent advances in the research on adipose tissue lymphatics and present a lymphatic-focused analysis of published single-cell and single-nucleus RNA sequencing datasets of adipose tissues. RECENT FINDINGS Although lymphatic expansion in obesity may limit inflammation and promote glycerol efflux from adipose tissue, lymphatic endothelial cells (LECs) secrete factors that reduce brown adipocyte thermogenesis. Transcriptomic analyses of these cells show that they express common lymphatic markers such as Prox1, but datasets from different studies show great variation in gene expression values due to the low number of captured LECs, depot differences, and species-specific gene expression patterns. SUMMARY As the importance of LECs in the homeostasis of adipose tissue has become evident, investigators want to shed light on the specific interactions of lymphatics with other cell types in adipose tissues. Extracting LECs from readily available transcriptomics datasets provides a standpoint for investigators for future research. However, systematic studies are needed to reveal unique identities according to depot and species-specific LEC signatures.
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46
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Sakers A, De Siqueira MK, Seale P, Villanueva CJ. Adipose-tissue plasticity in health and disease. Cell 2022; 185:419-446. [PMID: 35120662 PMCID: PMC11152570 DOI: 10.1016/j.cell.2021.12.016] [Citation(s) in RCA: 290] [Impact Index Per Article: 145.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 12/08/2021] [Accepted: 12/13/2021] [Indexed: 12/11/2022]
Abstract
Adipose tissue, colloquially known as "fat," is an extraordinarily flexible and heterogeneous organ. While historically viewed as a passive site for energy storage, we now appreciate that adipose tissue regulates many aspects of whole-body physiology, including food intake, maintenance of energy levels, insulin sensitivity, body temperature, and immune responses. A crucial property of adipose tissue is its high degree of plasticity. Physiologic stimuli induce dramatic alterations in adipose-tissue metabolism, structure, and phenotype to meet the needs of the organism. Limitations to this plasticity cause diminished or aberrant responses to physiologic cues and drive the progression of cardiometabolic disease along with other pathological consequences of obesity.
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Affiliation(s)
- Alexander Sakers
- Institute for Diabetes, Obesity & Metabolism, Department of Cell and Developmental Biology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104 USA
| | - Mirian Krystel De Siqueira
- Molecular, Cellular & Integrative Physiology Program, University of California, Los Angeles, Los Angeles, CA 90095-7070 USA; Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, CA 90095-7070 USA
| | - Patrick Seale
- Institute for Diabetes, Obesity & Metabolism, Department of Cell and Developmental Biology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104 USA.
| | - Claudio J Villanueva
- Molecular, Cellular & Integrative Physiology Program, University of California, Los Angeles, Los Angeles, CA 90095-7070 USA; Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, CA 90095-7070 USA.
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47
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Camell CD. Adipose tissue microenvironments during aging: Effects on stimulated lipolysis. Biochim Biophys Acta Mol Cell Biol Lipids 2022; 1867:159118. [PMID: 35131468 PMCID: PMC8986088 DOI: 10.1016/j.bbalip.2022.159118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 10/17/2021] [Accepted: 01/20/2022] [Indexed: 12/15/2022]
Abstract
Adipose tissue is a critical organ for nutrient sensing, energy storage and maintaining metabolic health. The failure of adipose tissue homeostasis leads to metabolic disease that is seen during obesity or aging. Local metabolic processes are coordinated by interacting microenvironments that make up the complexity and heterogeneity of the adipose tissue. Catecholamine-induced lipolysis, a critical pathway in adipocytes that drives the release of stored triglyceride as free fatty acid after stimulation, is impaired during aging. The impairment of this pathway is associated with a failure to maintain a healthy body weight, core body-temperature during cold stress or mount an immune response. Along with impairments in aged adipocytes, aging is associated with an accumulation of inflammation, immune cell activation, and increased dysfunction in the nervous and lymphatic systems within the adipose tissue. Together these microenvironments support the initiation of stimulated lipolysis and the transport of free fatty acid under conditions of metabolic homeostasis. However, during aging, the defects in these cellular systems result in a reduction in ability to stimulate lipolysis. This review will focus on how the immune, nervous and lymphatic systems interact during tissue homeostasis, review areas that are impaired with aging and discuss areas of research that are currently unclear.
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Affiliation(s)
- Christina D Camell
- Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, United States of America.
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48
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Chen H, Sun L, Feng L, Yin Y, Zhang W. Role of Innate lymphoid Cells in Obesity and Insulin Resistance. Front Endocrinol (Lausanne) 2022; 13:855197. [PMID: 35574038 PMCID: PMC9091334 DOI: 10.3389/fendo.2022.855197] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 03/24/2022] [Indexed: 12/12/2022] Open
Abstract
Obesity, a growing chronic metabolic disease, greatly increases the risk of metabolic syndrome which includes type 2 diabetes, fatty liver and cardiovascular diseases. Obesity-associated metabolic diseases significantly contribute to mortality and reduce life expectancy. Recently, innate lymphoid cells (ILCs) have emerged as crucial regulators of metabolic homeostasis and tissue inflammation. This review focuses on the roles of ILCs in different metabolic tissues, including adipose tissue, liver, pancreas, and intestine. We briefly outline the relationship between obesity, inflammation, and insulin resistance. We then discuss how ILCs in distinct metabolic organs may function to maintain metabolic homeostasis and contribute to obesity and its associated metabolic diseases. The potential of ILCs as the therapeutic target for obesity and insulin resistance is also addressed.
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Affiliation(s)
- Hong Chen
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, and Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University, Beijing, China
| | - Lijun Sun
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, and Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University, Beijing, China
| | - Lu Feng
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, and Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University, Beijing, China
| | - Yue Yin
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, and Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University, Beijing, China
- *Correspondence: Weizhen Zhang, ; Yue Yin,
| | - Weizhen Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, and Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University, Beijing, China
- Department of Surgery, University of Michigan Medical Center, Ann Arbor, MI, United States
- *Correspondence: Weizhen Zhang, ; Yue Yin,
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49
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Resident and migratory adipose immune cells control systemic metabolism and thermogenesis. Cell Mol Immunol 2021; 19:421-431. [PMID: 34837070 PMCID: PMC8891307 DOI: 10.1038/s41423-021-00804-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 10/28/2021] [Indexed: 02/08/2023] Open
Abstract
Glucose is a vital source of energy for all mammals. The balance between glucose uptake, metabolism and storage determines the energy status of an individual, and perturbations in this balance can lead to metabolic diseases. The maintenance of organismal glucose metabolism is a complex process that involves multiple tissues, including adipose tissue, which is an endocrine and energy storage organ that is critical for the regulation of systemic metabolism. Adipose tissue consists of an array of different cell types, including specialized adipocytes and stromal and endothelial cells. In addition, adipose tissue harbors a wide range of immune cells that play vital roles in adipose tissue homeostasis and function. These cells contribute to the regulation of systemic metabolism by modulating the inflammatory tone of adipose tissue, which is directly linked to insulin sensitivity and signaling. Furthermore, these cells affect the control of thermogenesis. While lean adipose tissue is rich in type 2 and anti-inflammatory cytokines such as IL-10, obesity tips the balance in favor of a proinflammatory milieu, leading to the development of insulin resistance and the dysregulation of systemic metabolism. Notably, anti-inflammatory immune cells, including regulatory T cells and innate lymphocytes, protect against insulin resistance and have the characteristics of tissue-resident cells, while proinflammatory immune cells are recruited from the circulation to obese adipose tissue. Here, we review the key findings that have shaped our understanding of how immune cells regulate adipose tissue homeostasis to control organismal metabolism.
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50
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Tysoe O. Ageing immune cells reduce adipose tissue function. Nat Rev Endocrinol 2021; 17:638. [PMID: 34545230 DOI: 10.1038/s41574-021-00574-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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