1
|
Knuth CM, Barayan D, Lee JH, Auger C, de Brito Monteiro L, Ricciuti Z, Metko D, Wells L, Sung HK, Screaton RA, Jeschke MG. Subcutaneous white adipose tissue independently regulates burn-induced hypermetabolism via immune-adipose crosstalk. Cell Rep 2024; 43:113584. [PMID: 38117653 PMCID: PMC10845122 DOI: 10.1016/j.celrep.2023.113584] [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: 02/21/2023] [Revised: 09/22/2023] [Accepted: 11/29/2023] [Indexed: 12/22/2023] Open
Abstract
Severe burns induce a chronic hypermetabolic state that persists well past wound closure, indicating that additional internal mechanisms must be involved. Adipose tissue is suggested to be a central regulator in perpetuating hypermetabolism, although this has not been directly tested. Here, we show that thermogenic adipose tissues are activated in parallel to increases in hypermetabolism independent of cold stress. Using an adipose tissue transplantation model, we discover that burn-derived subcutaneous white adipose tissue alone is sufficient to invoke a hypermetabolic response in a healthy recipient mouse. Concomitantly, transplantation of healthy adipose tissue alleviates metabolic dysfunction in a burn recipient. We further show that the nicotinic acetylcholine receptor signaling pathway may mediate an immune-adipose crosstalk to regulate adipose tissue remodeling post-injury. Targeting this pathway could lead to innovative therapeutic interventions to counteract hypermetabolic pathologies.
Collapse
Affiliation(s)
- Carly M Knuth
- Institute of Medical Science, University of Toronto, Toronto, ON M5S 1A8, Canada; Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada
| | - Dalia Barayan
- Institute of Medical Science, University of Toronto, Toronto, ON M5S 1A8, Canada; Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada
| | - Ju Hee Lee
- Translational Medicine Program, The Hospital for Sick Children, Toronto, ON M5G 0A4 Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Christopher Auger
- Division of Endocrinology, Diabetes and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA
| | | | | | - Dea Metko
- Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada
| | - Lisa Wells
- Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada
| | - Hoon-Ki Sung
- Translational Medicine Program, The Hospital for Sick Children, Toronto, ON M5G 0A4 Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Robert A Screaton
- Institute of Medical Science, University of Toronto, Toronto, ON M5S 1A8, Canada; Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada; Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Marc G Jeschke
- Institute of Medical Science, University of Toronto, Toronto, ON M5S 1A8, Canada; David Braley Cardiac, Vascular and Stroke Research Institute, Hamilton, ON L8L 2X2, Canada; Hamilton General Hospital, Hamilton Health Sciences, Hamilton, ON L8L 2X2, Canada; Department of Surgery, McMaster University, Hamilton, ON L8S 4K1, Canada.
| |
Collapse
|
2
|
Rabadán-Chávez G, Díaz de la Garza RI, Jacobo-Velázquez DA. White adipose tissue: Distribution, molecular insights of impaired expandability, and its implication in fatty liver disease. Biochim Biophys Acta Mol Basis Dis 2023; 1869:166853. [PMID: 37611674 DOI: 10.1016/j.bbadis.2023.166853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 07/17/2023] [Accepted: 08/18/2023] [Indexed: 08/25/2023]
Abstract
We are far behind the 2025 World Health Organization (WHO) goal of a zero increase in obesity. Close to 360 million people in Latin America and the Caribbean are overweight, with the highest rates observed in the Bahamas, Mexico, and Chile. To achieve relevant progress against the obesity epidemic, scientific research is essential to establish uniform practices in the study of obesity pathophysiology (using pre-clinical and clinical models) that ensure accuracy, reproducibility, and transcendent outcomes. The present review focuses on relevant aspects of white adipose tissue (WAT) expansion, underlying mechanisms of inefficient expandability, and its repercussion in ectopic lipid accumulation in the liver during nutritional abundance. In addition, we highlight the potential role of disrupted circadian rhythm in WAT metabolism. Since genetic factors also play a key role in determining an individual's predisposition to weight gain, we describe the most relevant genes associated with obesity in the Mexican population, underlining that most of them are related to appetite control.
Collapse
Affiliation(s)
- Griselda Rabadán-Chávez
- Tecnologico de Monterrey, Institute for Obesity Research, Av. Eugenio Garza Sada 2501 Sur, 64849 Monterrey, NL, Mexico
| | - Rocío I Díaz de la Garza
- Tecnologico de Monterrey, Institute for Obesity Research, Av. Eugenio Garza Sada 2501 Sur, 64849 Monterrey, NL, Mexico; Tecnologico de Monterrey, Escuela de Ingeniería y Ciencias, Campus Monterrey, Av. Eugenio Garza Sada 2501 Sur, 64849 Monterrey, NL, Mexico.
| | - Daniel A Jacobo-Velázquez
- Tecnologico de Monterrey, Institute for Obesity Research, Av. Eugenio Garza Sada 2501 Sur, 64849 Monterrey, NL, Mexico; Tecnologico de Monterrey, Escuela de Ingeniería y Ciencias, Campus Guadalajara, Av. General Ramon Corona 2514, C.P. 45201 Zapopan, Jalisco, Mexico.
| |
Collapse
|
3
|
Zhang WN, Zhu H, Ma ZW, Yu J, Yang Y, Lu XB, Lv YF, Wang XD. Subcutaneous adipose tissue alteration in aging process associated with thyroid hormone signaling. BMC Med Genomics 2023; 16:202. [PMID: 37626392 PMCID: PMC10463827 DOI: 10.1186/s12920-023-01641-5] [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: 05/09/2023] [Accepted: 08/22/2023] [Indexed: 08/27/2023] Open
Abstract
BACKGROUND Functional changes in subcutaneous adipose tissue (SAT) occur earlier in the aging process and play an important role in the occurrence and development of age-related metabolic diseases. The mechanism of this phenomenon is still unclear, and the change in adipose tissue with age is poorly understood. METHODS We used transcriptome sequencing (RNA seq) to screen differentially expressed genes at the mRNA level, and analyzed the functional characteristics of the differential genes through GO and KEGG analysis in human SAT of all ages. In order to clarify the specific mechanism of the functional change, we analyzed the chromatin accessibility in the promoter region in the same SAT used in the RNA seq by the assay for transposase-accessible chromatin with high throughput sequencing (ATAC-seq) and obtained the functional genes in SAT changed with age. To verify these changes, we enlarged our sample content of human SAT. The primary mice adipocytes were extracted and stimulated by thyroid hormone of different concentration to construct an animal model, and the expression of the genes were determined through real-time Polymerase Chain Reaction(RT-PCR). The oxygen consumption test and immunofluorescence staining were used to determine the mitochondrial function of SAT. RESULTS RNA-seq showed characteristic gene expression of young and old human SAT, in which 331 genes were up-regulated and 349 genes were down-regulated. ATAC-seq, RNA-seq, combined with the mouse prediction model, determined the functional changed characteristics of seven genes. All these genes expressed differently in SAT of different ages, in which, NCF1, NLRP3, DUOX1 showed positive correlation with age; The expression of IFI30, P2RX1, P2RX6, PRODH, however, decreased with age. And all these genes showed dose dependent alternations under treatment of triiodothyroxine in mice SAT. The oxygen consumption rate revealed significant changes of the mitochondrial function and ROS accumulation in human SAT of different ages. CONCLUSION In elderly individuals, the function, in addition to distribution, of SAT undergoes significant changes, primarily in mitochondria, which may be due to insensitivity to thyroid hormone signaling. These results identified seven novel genes regulated by thyroid hormone, exhibiting significant changes in SAT of different age, and are probably related to the dysfunction of the aged SAT due to the mitochondrial damage and ROS accumulation.
Collapse
Affiliation(s)
- Wen-Na Zhang
- Division of Endocrinology, the First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Hao Zhu
- Division of Endocrinology, the First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Zhen-Wu Ma
- Division of Endocrinology, the First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Jing Yu
- Division of Geriatric Endocrinology, the First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Yun Yang
- Division of Endocrinology, the First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Xuan-Bei Lu
- Division of Endocrinology, the First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Yi-Fan Lv
- Division of Geriatric Endocrinology, the First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China.
| | - Xiao-Dong Wang
- Division of Endocrinology, the First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China.
| |
Collapse
|
4
|
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: 0] [Impact Index Per Article: 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.
Collapse
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.
| |
Collapse
|
5
|
Davis S, Hocking S, Watt MJ, Gunton JE. Metabolic effects of lipectomy and of adipose tissue transplantation. Obesity (Silver Spring) 2023; 31:7-19. [PMID: 36479639 PMCID: PMC10946570 DOI: 10.1002/oby.23601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 08/10/2022] [Accepted: 08/15/2022] [Indexed: 12/12/2022]
Abstract
OBJECTIVE The goal of this study was to review the metabolic effects of fat transplantation. METHODS Fat (adipose tissue [AT]) transplantation has been performed extensively for many years in the cosmetic reconstruction industry. However, not all fats are equal. White, brown, and beige AT differ in energy storage and use. Brown and beige AT consume glucose and lipids for thermogenesis and, theoretically, may provide greater metabolic benefit in transplantation. Here, the authors review the metabolic effects of AT transplantation. RESULTS Removal of subcutaneous human AT does not have beneficial metabolic effects. Most studies find no benefit from visceral AT transplantation and some studies report harmful effects. In contrast, transplantation of inguinal or subcutaneous AT in mice has positive effects. Brown AT transplant studies have variable results depending on the model but most show benefit. CONCLUSIONS Many technical improvements have optimized fat grafting and transplantation in cosmetic surgery. Transplantation of subcutaneous AT has the potential for significant metabolic benefits, although there are few studies in humans or using human AT. Brown AT transplantation is beneficial but not readily feasible in humans thus ex vivo "beiging" may be a useful strategy. AT transplantation may provide clinical benefits in metabolic disorders, especially in the setting of lipodystrophy.
Collapse
Affiliation(s)
- Sarah Davis
- Centre for Diabetes, Obesity and Endocrinology ResearchThe Westmead Institute for Medical Research, The University of SydneySydneyNew South WalesAustralia
- Faculty of Medicine and HealthThe University of SydneySydneyNew South WalesAustralia
| | - Samantha Hocking
- Faculty of Medicine and HealthThe University of SydneySydneyNew South WalesAustralia
- Department of EndocrinologyRoyal Prince Alfred HospitalSydneyNew South WalesAustralia
| | - Matthew J. Watt
- Department of Anatomy and PhysiologyUniversity of MelbourneMelbourneVictoriaAustralia
| | - Jenny E. Gunton
- Centre for Diabetes, Obesity and Endocrinology ResearchThe Westmead Institute for Medical Research, The University of SydneySydneyNew South WalesAustralia
- Faculty of Medicine and HealthThe University of SydneySydneyNew South WalesAustralia
- Department of Diabetes and EndocrinologyWestmead HospitalSydneyNew South WalesAustralia
| |
Collapse
|
6
|
Obesity-Related Neuroinflammation: Magnetic Resonance and Microscopy Imaging of the Brain. Int J Mol Sci 2022; 23:ijms23158790. [PMID: 35955925 PMCID: PMC9368789 DOI: 10.3390/ijms23158790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 08/03/2022] [Accepted: 08/06/2022] [Indexed: 12/01/2022] Open
Abstract
Obesity is a major risk factor of Alzheimer’s disease and related dementias. The principal feature of dementia is a loss of neurons and brain atrophy. The mechanistic links between obesity and the neurodegenerative processes of dementias are not fully understood, but recent research suggests that obesity-related systemic inflammation and subsequent neuroinflammation may be involved. Adipose tissues release multiple proinflammatory molecules (fatty acids and cytokines) that impact blood and vessel cells, inducing low-grade systemic inflammation that can transition to tissues, including the brain. Inflammation in the brain—neuroinflammation—is one of key elements of the pathobiology of neurodegenerative disorders; it is characterized by the activation of microglia, the resident immune cells in the brain, and by the structural and functional changes of other cells forming the brain parenchyma, including neurons. Such cellular changes have been shown in animal models with direct methods, such as confocal microscopy. In humans, cellular changes are less tangible, as only indirect methods such as magnetic resonance (MR) imaging are usually used. In these studies, obesity and low-grade systemic inflammation have been associated with lower volumes of the cerebral gray matter, cortex, and hippocampus, as well as altered tissue MR properties (suggesting microstructural variations in cellular and molecular composition). How these structural variations in the human brain observed using MR imaging relate to the cellular variations in the animal brain seen with microscopy is not well understood. This review describes the current understanding of neuroinflammation in the context of obesity-induced systemic inflammation, and it highlights need for the bridge between animal microscopy and human MR imaging studies.
Collapse
|
7
|
Xiong T, Rodriguez Paris V, Edwards MC, Hu Y, Cochran BJ, Rye KA, Ledger WL, Padmanabhan V, Handelsman DJ, Gilchrist RB, Walters KA. Androgen signaling in adipose tissue, but less likely skeletal muscle, mediates development of metabolic traits in a PCOS mouse model. Am J Physiol Endocrinol Metab 2022; 323:E145-E158. [PMID: 35658542 DOI: 10.1152/ajpendo.00418.2021] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Polycystic ovary syndrome (PCOS) is a common, multifactorial disorder characterized by endocrine, reproductive, and metabolic dysfunction. As the etiology of PCOS is unknown, there is no cure and symptom-oriented treatments are suboptimal. Hyperandrogenism is a key diagnostic trait, and evidence suggests that androgen receptor (AR)-mediated actions are critical to PCOS pathogenesis. However, the key AR target sites involved remain to be fully defined. Adipocyte and muscle dysfunction are proposed as important sites involved in the manifestation of PCOS traits. We investigated the role of AR signaling in white adipose tissue (WAT), brown adipose tissue (BAT), and skeletal muscle in the development of PCOS in a hyperandrogenic PCOS mouse model. As expected, dihydrotestosterone (DHT) exposure induced key reproductive and metabolic PCOS traits in wild-type (WT) females. Transplantation of AR-insensitive (AR-/-) WAT or BAT from AR knockout females (ARKO) into DHT-treated WT mice ameliorated some metabolic PCOS features, including increased body weight, adiposity, and adipocyte hypertrophy, but not reproductive PCOS traits. In contrast, DHT-treated ARKO female mice transplanted with AR-responsive (AR+/+) WAT or BAT continued to resist developing PCOS traits. DHT-treated skeletal muscle-specific AR knockout females (SkMARKO) displayed a comparable phenotype with that of DHT-treated WT females, with full development of PCOS traits. Taken together, these findings infer that both WAT and BAT, but less likely skeletal muscle, are key sites of AR-mediated actions involved in the experimental pathogenesis of metabolic PCOS traits. These data further support targeting adipocyte AR-driven pathways in future research aimed at developing novel therapeutic interventions for PCOS.NEW & NOTEWORTHY Hyperandrogenism is a key feature in the pathogenesis of polycystic ovary syndrome (PCOS); however, the tissue sites of androgen receptor (AR) signaling are unclear. In this study, AR signaling in white and brown adipose tissue, but less likely in skeletal muscle, was found to be involved in the development of metabolic PCOS traits, highlighting the importance of androgen actions in adipose tissue and obesity in the manifestation of metabolic disturbances.
Collapse
Affiliation(s)
- Ting Xiong
- Fertility and Research Centre, School of Clinical Medicine, University of New South Wales, Sydney, New South Wales, Australia
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Valentina Rodriguez Paris
- Fertility and Research Centre, School of Clinical Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | - Melissa C Edwards
- Fertility and Research Centre, School of Clinical Medicine, University of New South Wales, Sydney, New South Wales, Australia
- Andrology Laboratory, ANZAC Research Institute, University of Sydney, Sydney, New South Wales, Australia
| | - Ying Hu
- Fertility and Research Centre, School of Clinical Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | - Blake J Cochran
- Lipid Research Group, School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | - Kerry-Anne Rye
- Lipid Research Group, School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | - William L Ledger
- Fertility and Research Centre, School of Clinical Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | | | - David J Handelsman
- Andrology Laboratory, ANZAC Research Institute, University of Sydney, Sydney, New South Wales, Australia
| | - Robert B Gilchrist
- Fertility and Research Centre, School of Clinical Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | - Kirsty A Walters
- Fertility and Research Centre, School of Clinical Medicine, University of New South Wales, Sydney, New South Wales, Australia
- Andrology Laboratory, ANZAC Research Institute, University of Sydney, Sydney, New South Wales, Australia
| |
Collapse
|
8
|
Li W, Yin H, Chen Y, Liu Q, Wang Y, Qiu D, Ma H, Geng Q. Associations Between Adult Triceps Skinfold Thickness and All-Cause, Cardiovascular and Cerebrovascular Mortality in NHANES 1999–2010: A Retrospective National Study. Front Cardiovasc Med 2022; 9:858994. [PMID: 35620519 PMCID: PMC9127233 DOI: 10.3389/fcvm.2022.858994] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 04/06/2022] [Indexed: 11/13/2022] Open
Abstract
Background:The association between triceps skinfold (TSF) thickness and mortality in previous studies was controversial. This study aimed to explore how TSF thickness affects all-cause, cardiovascular, and cerebrovascular mortality among the United States (U.S.) general population.MethodsOur research included 25,954 adults in the National Health and Nutrition Examination Survey (NHANES) from 1999 to 2010. Participants were categorized by the baseline TSF quartiles [quartile 1 (Q1): < 11.8, (Q2): 11.8–17.4, (Q3): 17.4–25, and (Q4): ≥25; unit: millimeter (mm)]. Cox regression models were used to assess the association of TSF with all-cause, cardiovascular, and cerebrovascular mortality. The association between mid-arm muscle circumference (MAMC) and mortality was also explored. Subgroup analyses were conducted to assess heterogeneity in different subgroups.ResultsThe highest TSF group (Q4) had the lowest risk to experience all-cause (HR, 0.46; 95% CI, 0.38–0.59; P < 0.001) and cardiovascular mortality (HR, 0.35; 95% CI, 0.23–0.54; P < 0.001) than the lowest TSF group (Q1) after multivariate adjustment. However, there was no relationship between TSF quartiles and cerebrovascular mortality (HR, 0.98; 95%CI, 0.42–2.30; P = 0.97). The protective effects of TSF thickness on mortality still existed after adjusting for BMI and MAMC. For every 1 mm increase in TSF thickness, the risk of all-cause and cardiovascular death decreased by 4% (HR, 0.96; 95% CI, 0.95–0.97; P < 0.001) and 6% (HR, 0.94; 95% CI, 0.93–0.96; P < 0.001), respectively. In the stratified analysis, the relationships between TSF and mortality risk were generally similar across all subgroups.ConclusionsHigher TSF thickness was associated with lower all-cause and cardiovascular mortality, independent of BMI and MAMC. Our study revealed that the TSF thickness may be a convenient and credible indicator to predict mortality, especially in those with severe cardiovascular diseases.
Collapse
Affiliation(s)
- Weiya Li
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Han Yin
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Yilin Chen
- School of Medicine, South China University of Technology, Guangzhou, China
| | - Quanjun Liu
- School of Medicine, South China University of Technology, Guangzhou, China
| | - Yu Wang
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Di Qiu
- Department of Anesthesiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Huan Ma
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- *Correspondence: Huan Ma
| | - Qingshan Geng
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- School of Medicine, South China University of Technology, Guangzhou, China
- Qingshan Geng
| |
Collapse
|
9
|
Dani V, Yao X, Dani C. Transplantation of fat tissues and iPSC-derived energy expenditure adipocytes to counteract obesity-driven metabolic disorders: Current strategies and future perspectives. Rev Endocr Metab Disord 2022; 23:103-110. [PMID: 33751363 PMCID: PMC7982512 DOI: 10.1007/s11154-021-09632-6] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/26/2021] [Indexed: 12/25/2022]
Abstract
Several therapeutic options have been developed to address the obesity epidemic and treat associated metabolic diseases. Despite the beneficial effects of surgery and drugs, effective therapeutic solutions have been held back by the poor long-term efficiency and detrimental side effects. The development of alternative approaches is thus urgently required. Fat transplantation is common practice in many surgical procedures, including aesthetic and reconstructive surgery, and is a budding future direction for treating obesity-related metabolic defects. This review focuses on adipose tissue transplantation and the recent development of cell-based therapies to boost the mass of energy-expenditure cells. Brown adipocyte transplantation is a promising novel therapy to manage obesity and associated metabolic disorders, but the need to have an abundant and relevant source of brown fat tissue or brown adipocytes for transplantation is a major hurdle to overcome. Current studies have focused on the rodent model to obtain a proof of concept of a tissue-transplantation strategy able to achieve effective long-term effects to reverse metabolic defects in obese patients. Future perspectives and opportunities to develop innovative human fat tissue models and 3D engineered hiPSC-adipocytes are discussed.
Collapse
Affiliation(s)
- Vincent Dani
- Université Côte d'Azur, INSERM, CNRS, Nice, iBV, France
| | - Xi Yao
- Université Côte d'Azur, INSERM, CNRS, Nice, iBV, France
| | - Christian Dani
- Université Côte d'Azur, INSERM, CNRS, Nice, iBV, France.
| |
Collapse
|
10
|
The Roles and Associated Mechanisms of Adipokines in Development of Metabolic Syndrome. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27020334. [PMID: 35056647 PMCID: PMC8781412 DOI: 10.3390/molecules27020334] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/30/2021] [Accepted: 01/03/2022] [Indexed: 12/12/2022]
Abstract
Metabolic syndrome is a cluster of metabolic indicators that increase the risk of diabetes and cardiovascular diseases. Visceral obesity and factors derived from altered adipose tissue, adipokines, play critical roles in the development of metabolic syndrome. Although the adipokines leptin and adiponectin improve insulin sensitivity, others contribute to the development of glucose intolerance, including visfatin, fetuin-A, resistin, and plasminogen activator inhibitor-1 (PAI-1). Leptin and adiponectin increase fatty acid oxidation, prevent foam cell formation, and improve lipid metabolism, while visfatin, fetuin-A, PAI-1, and resistin have pro-atherogenic properties. In this review, we briefly summarize the role of various adipokines in the development of metabolic syndrome, focusing on glucose homeostasis and lipid metabolism.
Collapse
|
11
|
Viraragavan A, Willmer T, Patel O, Basson A, Johnson R, Pheiffer C. Cafeteria diet induces global and Slc27a3-specific hypomethylation in male Wistar rats. Adipocyte 2021; 10:108-118. [PMID: 33570456 PMCID: PMC7889207 DOI: 10.1080/21623945.2021.1886697] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Increased visceral adipose tissue (VAT) is associated with metabolic dysfunction, while subcutaneous adipose tissue (SAT) is considered protective. The mechanisms underlying these differences are not fully elucidated. This study aimed to investigate molecular differences in VAT and SAT of male Wistar rats fed a cafeteria diet (CD) or a standard rodent diet (STD) for three months. The expression of fatty acid metabolism genes was analysed by quantitative real-time PCR. Global and gene-specific DNA methylation was quantified using the Imprint® Methylated DNA Quantification Kit and pyrosequencing, respectively. Bodyweight, retroperitoneal fat mass, insulin resistance, leptin and triglyceride concentrations and adipocyte hypertrophy were higher in CD- compared to STD-fed rats. The expression of solute carrier family 27 member 3 (Slc27a3), a fatty acid transporter, was 9.6-fold higher in VAT and 6.3-fold lower in SAT of CD- versus STD-fed rats. Taqman probes confirmed increased Slc27a3 expression, while pyrosequencing showed Slc27a3 hypomethylation in VAT of CD- compared to STD-fed rats. The CD decreased global methylation in both VAT and SAT, although no depot differences were observed. Dysregulated fatty acid influx in VAT, in response to a CD, provides insight into the mechanisms underlying depot-differences in adipose tissue expansion during obesity and metabolic disease. Abbreviations: CD: cafeteria diet; E2F1: E2F Transcription Factor 1; EMSA: electrophoretic mobility shift assay; EGFR: epidermal growth factor receptor; GCF: GC-Rich Sequence DNA-Binding Factor; HOMA-IR: Homeostasis model for insulin resistance; NKX2-1: NK2 homeobox 1; PCR: Polymerase chain reaction; qRT-PCR: quantitative real-time PCR; RF: retroperitoneal fat; SAT: subcutaneous adipose tissue; Slc27a3: solute carrier family 27 member 3; STD: standard diet; TNFα: tumour necrosis factor alpha; TTS: transcriptional start site; T2D: Type 2 Diabetes; VAT: visceral adipose tissue; WT1 I: Wilms’ tumour protein 1
Collapse
Affiliation(s)
- Amsha Viraragavan
- Biomedical Research and Innovation Platform, South African Medical Research Council, Tygerberg, South Africa
- Department of Biochemistry and Microbiology, University of Zululand, Kwa-Dlangezwa, South Africa
| | - Tarryn Willmer
- Biomedical Research and Innovation Platform, South African Medical Research Council, Tygerberg, South Africa
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg, South Africa
| | - Oelfah Patel
- Biomedical Research and Innovation Platform, South African Medical Research Council, Tygerberg, South Africa
- Division of Clinical Pharmacology, Department of Medicine, Faculty of Medicine and Health Sciences, University of Stellenbosch, Tygerberg, South Africa
| | - Albertus Basson
- Department of Biochemistry and Microbiology, University of Zululand, Kwa-Dlangezwa, South Africa
| | - Rabia Johnson
- Biomedical Research and Innovation Platform, South African Medical Research Council, Tygerberg, South Africa
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg, South Africa
| | - Carmen Pheiffer
- Biomedical Research and Innovation Platform, South African Medical Research Council, Tygerberg, South Africa
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg, South Africa
| |
Collapse
|
12
|
Teklu M, Zhou W, Kapoor P, Patel N, Playford MP, Sorokin AV, Dey AK, Teague HL, Manyak GA, Rodante JA, Keel A, Chen MY, Bluemke DA, Khera AV, Mehta NN. Abdominal subcutaneous adipose tissue negatively associates with subclinical coronary artery disease in men with psoriasis. Am J Prev Cardiol 2021; 8:100231. [PMID: 34553185 PMCID: PMC8441148 DOI: 10.1016/j.ajpc.2021.100231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 07/13/2021] [Accepted: 08/02/2021] [Indexed: 11/25/2022] Open
Abstract
Objective Understand the relationship between abdominal subcutaneous adipose tissue (ASAT) and coronary atherosclerosis defined as noncalcified and lipid-rich necrotic core burden in psoriasis. Methods We performed a cross-sectional study of 232 participants (92 women) with psoriasis and without known cardiovascular disease. Participants underwent coronary computed tomography angiography to characterize coronary atherosclerosis burden and low dose abdominal computed tomography to quantify subcutaneous and visceral adipose tissue. Fat depot volumes were first adjusted for each participant's BMI (ASATadjBMI). Results In women, there was a positive correlation between ASATadjBMI and systemic inflammation as assessed by hs-C-reactive protein (r=0.30; p=.004) and GlycA (r=0.29; p=.007) as well as total cholesterol (r=0.24; p=.02) and low-density lipoprotein cholesterol (r=0.22; p=.04). In men, ASATadjBMI correlated with hs-C-reactive protein (r=0.18; p=.04) and insulin resistance (r=0.17; p=.04). In models fully adjusted for traditional cardiovascular risk factors, ASATadjBMI negatively associated with noncalcified and lipid-rich necrotic core burden in men (β= -0.17; p=.03, β= -0.20; p=.03, respectively), but not women (β= -0.06; p=.57, β= 0.09; p=.49, respectively) with psoriasis. Conclusions For a given BMI, ASAT negatively associated with coronary atherosclerosis burden in male participants with psoriasis. The observed sex-specific effects warrant further study of ASAT in states of chronic inflammation.
Collapse
Affiliation(s)
- Meron Teklu
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Wunan Zhou
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Promita Kapoor
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Nidhi Patel
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Martin P Playford
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Alexander V Sorokin
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Amit K Dey
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Heather L Teague
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Grigory A Manyak
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Justin A Rodante
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Andrew Keel
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Marcus Y Chen
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - David A Bluemke
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Amit V Khera
- Center for Genomic Medicine, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Nehal N Mehta
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| |
Collapse
|
13
|
Kim S, Henneicke H, Cavanagh LL, Macfarlane E, Thai LJ, Foong D, Gasparini SJ, Fong-Yee C, Swarbrick MM, Seibel MJ, Zhou H. Osteoblastic glucocorticoid signaling exacerbates high-fat-diet- induced bone loss and obesity. Bone Res 2021; 9:40. [PMID: 34465731 PMCID: PMC8408138 DOI: 10.1038/s41413-021-00159-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 04/21/2021] [Accepted: 05/19/2021] [Indexed: 12/22/2022] Open
Abstract
Chronic high-fat diet (HFD) consumption not only promotes obesity and insulin resistance, but also causes bone loss through mechanisms that are not well understood. Here, we fed wild-type CD-1 mice either chow or a HFD (43% of energy from fat) for 18 weeks; HFD-fed mice exhibited decreased trabecular volume (-28%) and cortical thickness (-14%) compared to chow-fed mice. In HFD-fed mice, bone loss was due to reduced bone formation and mineral apposition, without obvious effects on bone resorption. HFD feeding also increased skeletal expression of sclerostin and caused deterioration of the osteocyte lacunocanalicular network (LCN). In mice fed HFD, skeletal glucocorticoid signaling was activated relative to chow-fed mice, independent of serum corticosterone concentrations. We therefore examined whether skeletal glucocorticoid signaling was necessary for HFD-induced bone loss, using transgenic mice lacking glucocorticoid signaling in osteoblasts and osteocytes (HSD2OB/OCY-tg mice). In HSD2OB/OCY-tg mice, bone formation and mineral apposition rates were not suppressed by HFD, and bone loss was significantly attenuated. Interestingly, in HSD2OB/OCY-tg mice fed HFD, both Wnt signaling (less sclerostin induction, increased β-catenin expression) and glucose uptake were significantly increased, relative to diet- and genotype-matched controls. The osteocyte LCN remained intact in HFD-fed HSD2OB/OCY-tg mice. When fed a HFD, HSD2OB/OCY-tg mice also increased their energy expenditure and were protected against obesity, insulin resistance, and dyslipidemia. Therefore, glucocorticoid signaling in osteoblasts and osteocytes contributes to the suppression of bone formation in HFD-fed mice. Skeletal glucocorticoid signaling is also an important determinant of glucose uptake in bone, which influences the whole-body metabolic response to HFD.
Collapse
Affiliation(s)
- Sarah Kim
- Bone Research Program, ANZAC Research Institute, The University of Sydney, Sydney, NSW, Australia.,Concord Clinical School, The University of Sydney, Sydney, NSW, Australia
| | - Holger Henneicke
- Bone Research Program, ANZAC Research Institute, The University of Sydney, Sydney, NSW, Australia.,Department of Medicine III, Technische University Dresden Medical Center, Dresden, Germany.,Center for Healthy Aging, Technische Universität Dresden Medical Center, Dresden, Germany.,Center for Regenerative Therapies Dresden, Technische University Dresden, Dresden, Germany
| | - Lauryn L Cavanagh
- Bone Research Program, ANZAC Research Institute, The University of Sydney, Sydney, NSW, Australia
| | - Eugenie Macfarlane
- Bone Research Program, ANZAC Research Institute, The University of Sydney, Sydney, NSW, Australia
| | - Lee Joanne Thai
- Bone Research Program, ANZAC Research Institute, The University of Sydney, Sydney, NSW, Australia
| | - Daphne Foong
- Bone Research Program, ANZAC Research Institute, The University of Sydney, Sydney, NSW, Australia
| | - Sylvia J Gasparini
- Bone Research Program, ANZAC Research Institute, The University of Sydney, Sydney, NSW, Australia
| | - Colette Fong-Yee
- Bone Research Program, ANZAC Research Institute, The University of Sydney, Sydney, NSW, Australia
| | - Michael M Swarbrick
- Bone Research Program, ANZAC Research Institute, The University of Sydney, Sydney, NSW, Australia.,Concord Clinical School, The University of Sydney, Sydney, NSW, Australia
| | - Markus J Seibel
- Bone Research Program, ANZAC Research Institute, The University of Sydney, Sydney, NSW, Australia.,Concord Clinical School, The University of Sydney, Sydney, NSW, Australia.,Department of Endocrinology and Metabolism, Concord Repatriation General Hospital, The University of Sydney, Sydney, NSW, Australia
| | - Hong Zhou
- Bone Research Program, ANZAC Research Institute, The University of Sydney, Sydney, NSW, Australia. .,Concord Clinical School, The University of Sydney, Sydney, NSW, Australia.
| |
Collapse
|
14
|
Zhu L, Feng Z, Shu X, Gao Q, Wu J, Du Z, Li R, Wang L, Chen N, Li Y, Luo M, Wu J. In situ transplantation of adipose-derived stem cells via photoactivation improves glucose metabolism in obese mice. Stem Cell Res Ther 2021; 12:408. [PMID: 34266493 PMCID: PMC8281693 DOI: 10.1186/s13287-021-02494-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 07/04/2021] [Indexed: 01/10/2023] Open
Abstract
Background Accumulating evidence suggests that enhanced adipose tissue macrophages (ATMs) are associated with metabolic disorders in obesity and type 2 diabetes. However, therapeutic persistence and reduced homing stem cell function following cell delivery remains a critical hurdle for the clinical translation of stem cells in current approaches. Methods We demonstrate that the effect of a combined application of photoactivation and adipose-derived stem cells (ASCs) using transplantation into visceral epididymal adipose tissue (EAT) in obesity. Cultured ASCs were derived from subcutaneous white adipose tissue isolated from mice fed a normal diet (ND). Results In diet-induced obesity, implantation of light-treated ASCs improved glucose tolerance and ameliorated systemic insulin resistance. Intriguingly, compared with non-light-treated ASCs, light-treated ASCs reduced monocyte infiltration and the levels of ATMs in EAT. Moreover, implantation of light-treated ASCs exerts more anti-inflammatory effects by suppressing M1 polarization and enhancing macrophage M2 polarization in EAT. Mass spectrometry revealed that light-treated human obese ASCs conditioned medium retained a more complete secretome with significant downregulation of pro-inflammatory cytokines and chemokines. Conclusions These data suggest that the combined application of photoactivation and ASCs using transplantation into dysfunctional adipose tissue contribute to selective suppression of inflammatory responses and protection from insulin resistance in obesity and type 2 diabetes. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-021-02494-4.
Collapse
Affiliation(s)
- Luochen Zhu
- Nantong Tumor Hospital (Tumor Hospital Affiliated to Nantong University), Nantong, Jiangsu, People's Republic of China.,Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, Sichuan, People's Republic of China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Ziqian Feng
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, Sichuan, People's Republic of China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Xin Shu
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, Sichuan, People's Republic of China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Qian Gao
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Jiaqi Wu
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, Sichuan, People's Republic of China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Zuoqin Du
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, Sichuan, People's Republic of China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Rong Li
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, Sichuan, People's Republic of China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Liqun Wang
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, Sichuan, People's Republic of China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Ni Chen
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, Sichuan, People's Republic of China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Yi Li
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, Sichuan, People's Republic of China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Mao Luo
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, Sichuan, People's Republic of China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Jianbo Wu
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, Sichuan, People's Republic of China. .,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, People's Republic of China.
| |
Collapse
|
15
|
Wróblewski A, Strycharz J, Świderska E, Balcerczyk A, Szemraj J, Drzewoski J, Śliwińska A. Chronic and Transient Hyperglycemia Induces Changes in the Expression Patterns of IL6 and ADIPOQ Genes and Their Associated Epigenetic Modifications in Differentiating Human Visceral Adipocytes. Int J Mol Sci 2021; 22:ijms22136964. [PMID: 34203452 PMCID: PMC8268546 DOI: 10.3390/ijms22136964] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 06/22/2021] [Accepted: 06/23/2021] [Indexed: 12/12/2022] Open
Abstract
Adipokines secreted by hypertrophic visceral adipose tissue (VAT) instigate low-grade inflammation, followed by hyperglycemia (HG)-related metabolic disorders. The latter may develop with the participation of epigenetic modifications. Our aim was to assess how HG influences selected epigenetic modifications and the expression of interleukin 6 (IL-6) and adiponectin (APN; gene symbol ADIPOQ) during the adipogenesis of human visceral preadipocytes (HPA-v). Adipocytes (Ads) were chronically or transiently HG-treated during three stages of adipogenesis (proliferation, differentiation, maturation). We measured adipokine mRNA, protein, proven or predicted microRNA expression (RT-qPCR and ELISA), and enrichment of H3K9/14ac, H3K4me3, and H3K9me3 at gene promoter regions (chromatin immunoprecipitation). In chronic HG, we detected different expression patterns of the studied adipokines at the mRNA and protein levels. Chronic and transient HG-induced changes in miRNA (miR-26a-5p, miR-26b-5p, let-7d-5p, let-7e-5p, miR-365a-3p, miR-146a-5p) were mostly convergent to altered IL-6 transcription. Alterations in histone marks at the IL6 promoter were also in agreement with IL-6 mRNA. The open chromatin marks at the ADIPOQ promoter mostly reflected the APN transcription during NG adipogenesis, while, in the differentiation stage, HG-induced changes in all studied marks were in line with APN mRNA levels. In summary, HG dysregulated adipokine expression, promoting inflammation. Epigenetic changes coexisted with altered expression of adipokines, especially for IL-6; therefore, epigenetic marks induced by transient HG may act as epi-memory in Ads. Such changes in the epigenome and expression of adipokines could be instrumental in the development of inflammation and metabolic deregulation of VAT.
Collapse
Affiliation(s)
- Adam Wróblewski
- Department of Medical Biochemistry, Medical University of Lodz, 92-215 Lodz, Poland; (J.S.); (E.Ś.); (J.S.)
- Correspondence: (A.W.); (A.Ś.)
| | - Justyna Strycharz
- Department of Medical Biochemistry, Medical University of Lodz, 92-215 Lodz, Poland; (J.S.); (E.Ś.); (J.S.)
| | - Ewa Świderska
- Department of Medical Biochemistry, Medical University of Lodz, 92-215 Lodz, Poland; (J.S.); (E.Ś.); (J.S.)
| | - Aneta Balcerczyk
- Department of Molecular Biophysics, University of Lodz, 90-236 Lodz, Poland;
| | - Janusz Szemraj
- Department of Medical Biochemistry, Medical University of Lodz, 92-215 Lodz, Poland; (J.S.); (E.Ś.); (J.S.)
| | - Józef Drzewoski
- Central Teaching Hospital of the Medical University of Lodz, 92-213 Lodz, Poland;
| | - Agnieszka Śliwińska
- Department of Nucleic Acids Biochemistry, Medical University of Lodz, 92-213 Lodz, Poland
- Correspondence: (A.W.); (A.Ś.)
| |
Collapse
|
16
|
Rojas-Rodriguez R, Ziegler R, DeSouza T, Majid S, Madore AS, Amir N, Pace VA, Nachreiner D, Alfego D, Mathew J, Leung K, Moore Simas TA, Corvera S. PAPPA-mediated adipose tissue remodeling mitigates insulin resistance and protects against gestational diabetes in mice and humans. Sci Transl Med 2021; 12:12/571/eaay4145. [PMID: 33239385 DOI: 10.1126/scitranslmed.aay4145] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 04/25/2020] [Accepted: 10/21/2020] [Indexed: 12/11/2022]
Abstract
Pregnancy is a physiological state of continuous adaptation to changing maternal and fetal nutritional needs, including a reduction of maternal insulin sensitivity allowing for appropriately enhanced glucose availability to the fetus. However, excessive insulin resistance in conjunction with insufficient insulin secretion results in gestational diabetes mellitus (GDM), greatly increasing the risk for pregnancy complications and predisposing both mothers and offspring to future metabolic disease. Here, we report a signaling pathway connecting pregnancy-associated plasma protein A (PAPPA) with adipose tissue expansion in pregnancy. Adipose tissue plays a central role in the regulation of insulin sensitivity, and we show that, in both mice and humans, pregnancy caused remodeling of adipose tissue evidenced by altered adipocyte size, vascularization, and in vitro expansion capacity. PAPPA is known to be a metalloprotease secreted by human placenta that modulates insulin-like growth factor (IGF) bioavailability through prolteolysis of IGF binding proteins (IGFBPs) 2, 4, and 5. We demonstrate that recombinant PAPPA can stimulate ex vivo human adipose tissue expansion in an IGFBP-5- and IGF-1-dependent manner. Moreover, mice lacking PAPPA displayed impaired adipose tissue remodeling, pregnancy-induced insulin resistance, and hepatic steatosis, recapitulating multiple aspects of human GDM. In a cohort of 6361 pregnant women, concentrations of circulating PAPPA are inversely correlated with glycemia and odds of developing GDM. These data identify PAPPA and the IGF signaling pathway as necessary for the regulation of maternal adipose tissue physiology and systemic glucose homeostasis, with consequences for long-term metabolic risk and potential for therapeutic use.
Collapse
Affiliation(s)
- Raziel Rojas-Rodriguez
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA.,Graduate School of Biomedical Sciences, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Rachel Ziegler
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Tiffany DeSouza
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Sana Majid
- Clinical Translational Research Pathway, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Aylin S Madore
- Departments of Obstetrics and Gynecology, University of Massachusetts Medical School and UMass Memorial Healthcare, Worcester, MA 01605, USA
| | - Nili Amir
- Departments of Obstetrics and Gynecology, University of Massachusetts Medical School and UMass Memorial Healthcare, Worcester, MA 01605, USA
| | - Veronica A Pace
- Clinical Translational Research Pathway, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Daniel Nachreiner
- Clinical Translational Research Pathway, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - David Alfego
- Division of Data Sciences and Technology, IT, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Jomol Mathew
- Division of Data Sciences and Technology, IT, University of Massachusetts Medical School, Worcester, MA 01605, USA.,Department of Population and Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Katherine Leung
- Departments of Obstetrics and Gynecology, University of Massachusetts Medical School and UMass Memorial Healthcare, Worcester, MA 01605, USA
| | - Tiffany A Moore Simas
- Departments of Obstetrics and Gynecology, University of Massachusetts Medical School and UMass Memorial Healthcare, Worcester, MA 01605, USA
| | - Silvia Corvera
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA.
| |
Collapse
|
17
|
Bourgeois C, Gorwood J, Olivo A, Le Pelletier L, Capeau J, Lambotte O, Béréziat V, Lagathu C. Contribution of Adipose Tissue to the Chronic Immune Activation and Inflammation Associated With HIV Infection and Its Treatment. Front Immunol 2021; 12:670566. [PMID: 34220817 PMCID: PMC8250865 DOI: 10.3389/fimmu.2021.670566] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Accepted: 05/24/2021] [Indexed: 12/12/2022] Open
Abstract
White adipose tissue (AT) contributes significantly to inflammation – especially in the context of obesity. Several of AT’s intrinsic features favor its key role in local and systemic inflammation: (i) large distribution throughout the body, (ii) major endocrine activity, and (iii) presence of metabolic and immune cells in close proximity. In obesity, the concomitant pro-inflammatory signals produced by immune cells, adipocytes and adipose stem cells help to drive local inflammation in a vicious circle. Although the secretion of adipokines by AT is a prime contributor to systemic inflammation, the lipotoxicity associated with AT dysfunction might also be involved and could affect distant organs. In HIV-infected patients, the AT is targeted by both HIV infection and antiretroviral therapy (ART). During the primary phase of infection, the virus targets AT directly (by infecting AT CD4 T cells) and indirectly (via viral protein release, inflammatory signals, and gut disruption). The initiation of ART drastically changes the picture: ART reduces viral load, restores (at least partially) the CD4 T cell count, and dampens inflammatory processes on the whole-body level but also within the AT. However, ART induces AT dysfunction and metabolic side effects, which are highly dependent on the individual molecules and the combination used. First generation thymidine reverse transcriptase inhibitors predominantly target mitochondrial DNA and induce oxidative stress and adipocyte death. Protease inhibitors predominantly affect metabolic pathways (affecting adipogenesis and adipocyte homeostasis) resulting in insulin resistance. Recently marketed integrase strand transfer inhibitors induce both adipocyte adipogenesis, hypertrophy and fibrosis. It is challenging to distinguish between the respective effects of viral persistence, persistent immune defects and ART toxicity on the inflammatory profile present in ART-controlled HIV-infected patients. The host metabolic status, the size of the pre-established viral reservoir, the quality of the immune restoration, and the natural ageing with associated comorbidities may mitigate and/or reinforce the contribution of antiretrovirals (ARVs) toxicity to the development of low-grade inflammation in HIV-infected patients. Protecting AT functions appears highly relevant in ART-controlled HIV-infected patients. It requires lifestyle habits improvement in the absence of effective anti-inflammatory treatment. Besides, reducing ART toxicities remains a crucial therapeutic goal.
Collapse
Affiliation(s)
- Christine Bourgeois
- CEA - Université Paris Saclay - INSERM U1184, Center for Immunology of Viral Infections and Autoimmune Diseases, IDMIT Department, IBFJ, Fontenay-aux-Roses, France
| | - Jennifer Gorwood
- Sorbonne Université, INSERM UMR_S 938, Centre de Recherche Saint-Antoine, Institut Hospitalo-Universitaire de Cardio-métabolisme et Nutrition (ICAN), FRM EQU201903007868, Paris, France
| | - Anaelle Olivo
- CEA - Université Paris Saclay - INSERM U1184, Center for Immunology of Viral Infections and Autoimmune Diseases, IDMIT Department, IBFJ, Fontenay-aux-Roses, France
| | - Laura Le Pelletier
- Sorbonne Université, INSERM UMR_S 938, Centre de Recherche Saint-Antoine, Institut Hospitalo-Universitaire de Cardio-métabolisme et Nutrition (ICAN), FRM EQU201903007868, Paris, France
| | - Jacqueline Capeau
- Sorbonne Université, INSERM UMR_S 938, Centre de Recherche Saint-Antoine, Institut Hospitalo-Universitaire de Cardio-métabolisme et Nutrition (ICAN), FRM EQU201903007868, Paris, France
| | - Olivier Lambotte
- CEA - Université Paris Saclay - INSERM U1184, Center for Immunology of Viral Infections and Autoimmune Diseases, IDMIT Department, IBFJ, Fontenay-aux-Roses, France.,AP-HP, Groupe Hospitalier Universitaire Paris Saclay, Hôpital Bicêtre, Service de Médecine Interne et Immunologie Clinique, Le Kremlin-Bicêtre, France
| | - Véronique Béréziat
- Sorbonne Université, INSERM UMR_S 938, Centre de Recherche Saint-Antoine, Institut Hospitalo-Universitaire de Cardio-métabolisme et Nutrition (ICAN), FRM EQU201903007868, Paris, France
| | - Claire Lagathu
- Sorbonne Université, INSERM UMR_S 938, Centre de Recherche Saint-Antoine, Institut Hospitalo-Universitaire de Cardio-métabolisme et Nutrition (ICAN), FRM EQU201903007868, Paris, France
| |
Collapse
|
18
|
Significance of Adipose Tissue Maintenance in Patients Undergoing Hemodialysis. Nutrients 2021; 13:nu13061895. [PMID: 34072922 PMCID: PMC8226793 DOI: 10.3390/nu13061895] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 05/20/2021] [Accepted: 05/27/2021] [Indexed: 12/23/2022] Open
Abstract
In the general population, obesity is known to be associated with adverse outcomes, including mortality. In contrast, high body mass index (BMI) may provide a survival advantage for hemodialysis patients, which is known as the obesity paradox. Although BMI is the most commonly used measure for the assessment of obesity, it does not distinguish between fat and lean mass. Fat mass is considered to serve as an energy reserve against a catabolic condition, while the capacity to survive starvation is also thought to be dependent on its amount. Thus, fat mass is used as a nutritional marker. For example, improvement of nutritional status by nutritional intervention or initiation of hemodialysis is associated with an increase in fat mass. Several studies have shown that higher levels of fat mass were associated with better survival in hemodialysis patients. Based on body distribution, fat mass is classified into subcutaneous and visceral fat. Visceral fat is metabolically more active and associated with metabolic abnormalities and inflammation, and it is thus considered to be a risk factor for cardiovascular disease and mortality. On the other hand, subcutaneous fat has not been consistently linked to adverse phenomena and may reflect nutritional status as a type of energy storage. Visceral and subcutaneous adipose tissues have different metabolic and inflammatory characteristics and may have opposing influences on various outcomes, including mortality. Results showing an association between increased subcutaneous fat and better survival, along with other conditions, such as cancer or cirrhosis, in hemodialysis patients have been reported. This evidence suggests that fat mass distribution (i.e., visceral fat and subcutaneous fat) plays a more important role for these beneficial effects in hemodialysis patients.
Collapse
|
19
|
Adipose stem cells in obesity: challenges and opportunities. Biosci Rep 2021; 40:225001. [PMID: 32452515 PMCID: PMC7284323 DOI: 10.1042/bsr20194076] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 05/08/2020] [Accepted: 05/22/2020] [Indexed: 02/07/2023] Open
Abstract
Adipose tissue, the storage of excessive energy in the body, secretes various proteins called adipokines, which connect the body’s nutritional status to the regulation of energy balance. Obesity triggers alterations of quantity and quality of various types of cells that reside in adipose tissue, including adipose stem cells (ASCs; referred to as adipose-derived stem/stromal cells in vitro). These alterations in the functionalities and properties of ASCs impair adipose tissue remodeling and adipose tissue function, which induces low-grade systemic inflammation, progressive insulin resistance, and other metabolic disorders. In contrast, the ability of ASCs to recruit new adipocytes when faced with caloric excess leads to healthy adipose tissue expansion, associated with lower amounts of inflammation, fibrosis, and insulin resistance. This review focuses on recent advances in our understanding of the identity of ASCs and their roles in adipose tissue development, homeostasis, expansion, and thermogenesis, and how these roles go awry in obesity. A better understanding of the biology of ASCs and their adipogenesis may lead to novel therapeutic targets for obesity and metabolic disease.
Collapse
|
20
|
Osawa S, Kato H, Maeda Y, Takakura H, Ogasawara J, Izawa T. Metabolomic Profiles in Adipocytes Differentiated from Adipose-Derived Stem Cells Following Exercise Training or High-Fat Diet. Int J Mol Sci 2021; 22:ijms22020966. [PMID: 33478060 PMCID: PMC7835847 DOI: 10.3390/ijms22020966] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Accepted: 01/10/2021] [Indexed: 11/16/2022] Open
Abstract
Controlling the differentiation potential of adipose-derived stem cells (ADSCs) is attracting attention as a new strategy for the prevention and treatment of obesity. Here, we aimed to observe the effect of exercise training (TR) and high-fat diet (HFD) on the metabolic profiles of ADSCs-derived adipocytes. The rats were divided into four groups: normal diet (ND)-fed control (ND-SED), ND-fed TR (ND-TR), HFD-fed control (HFD-SED), and HFD-fed TR (HFD-TR). After 9 weeks of intervention, ADSCs of epididymal and inguinal adipose tissues were differentiated into adipocytes. In the metabolome analysis of adipocytes after isoproterenol stimulation, 116 metabolites were detected. The principal component analysis demonstrated that ADSCs-derived adipocytes segregated into four clusters in each fat pad. Amino acid accumulation was greater in epididymal ADSCs-derived adipocytes of ND-TR and HFD-TR, but lower in inguinal ADSCs-derived adipocytes of ND-TR, than in the respective controls. HFD accumulated several metabolites including amino acids in inguinal ADSCs-derived adipocytes and more other metabolites in epididymal ones. Kyoto Encyclopedia of Genes and Genomes enrichment analysis revealed that TR mainly affected the pathways related to amino acid metabolism, except in inguinal ADSCs-derived adipocytes of HFD-TR rats. These findings provide a new way to understand the mechanisms underlying possible changes in the differentiation of ADSCs due to TR or HFD.
Collapse
Affiliation(s)
- Seita Osawa
- Graduate School of Health and Sports Science, Doshisha University, 1-3 Tatara-Miyakodani, Kyoto 610-0394, Japan
| | - Hisashi Kato
- Graduate School of Health and Sports Science, Doshisha University, 1-3 Tatara-Miyakodani, Kyoto 610-0394, Japan
- Organisation for Research Initiatives and Development, Doshisha University, 1-3 Tatara-Miyakodani, Kyoto 610-0394, Japan
| | - Yuki Maeda
- Graduate School of Health and Sports Science, Doshisha University, 1-3 Tatara-Miyakodani, Kyoto 610-0394, Japan
| | - Hisashi Takakura
- Graduate School of Health and Sports Science, Doshisha University, 1-3 Tatara-Miyakodani, Kyoto 610-0394, Japan
| | - Junetsu Ogasawara
- Division of Health Science, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Hokkaido 078-8510, Japan
| | - Tetsuya Izawa
- Graduate School of Health and Sports Science, Doshisha University, 1-3 Tatara-Miyakodani, Kyoto 610-0394, Japan
| |
Collapse
|
21
|
Youngblood R, Flesher CG, Delproposto J, Baker NA, Neeley CK, Li F, Lumeng CN, Shea LD, O'Rourke RW. Regulation of adipose tissue inflammation and systemic metabolism in murine obesity by polymer implants loaded with lentiviral vectors encoding human interleukin-4. Biotechnol Bioeng 2020; 117:3891-3901. [PMID: 32729936 PMCID: PMC8358590 DOI: 10.1002/bit.27523] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 07/26/2020] [Accepted: 07/28/2020] [Indexed: 11/08/2022]
Abstract
Dysfunctional adipose tissue plays a central role in the pathogenesis of the obesity-related metabolic disease, including type 2 diabetes. Targeting adipose tissue using biopolymer implants is a novel therapeutic approach for metabolic disease. We transplanted porous poly(lactide-co-glycolide) (PLG) implants coated with human interleukin-4 (hIL-4)-expressing lentivirus into epididymal white adipose tissue (eWAT) of mice fed a high-fat diet. Tissue and systemic inflammation and metabolism were studied with flow cytometry, immunohistochemistry, quantitative real-time polymerase chain reaction, adipose tissue histology, and in vivo glucose tolerance testing at 2 and 10 weeks of a high-fat diet. PLG implants carrying hIL-4-expressing lentivirus implanted into epididymal white adipose tissue of mice-regulated adipose tissue inflammation, including increased CD3+ CD4+ T-cell frequency, increased eWAT adipocyte hypertrophy, and decreased FASN and ATGL expression, along with reduced fasting blood glucose levels. These effects were observed in early obesity but were not maintained in established obesity. Local delivery of bioimplants loaded with cytokine-expressing lentivirus vectors to adipose tissue influences tissue inflammation and systemic metabolism in early obesity. Further study will be required to show more durable metabolic effects. These data demonstrate that polymer biomaterials implanted into adipose tissue have the potential to modulate local tissue and systemic inflammation and metabolism.
Collapse
Affiliation(s)
- Richard Youngblood
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan
| | - Carmen G Flesher
- Department of Surgery, University of Michigan Medical School, Ann Arbor, Michigan
| | - Jennifer Delproposto
- Department of Pediatrics and Communicable Diseases, University of Michigan Medical School, Ann Arbor, Michigan
| | - Nicki A Baker
- Department of Surgery, University of Michigan Medical School, Ann Arbor, Michigan
| | - Christopher K Neeley
- Department of Surgery, University of Michigan Medical School, Ann Arbor, Michigan
| | - Fanghua Li
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan
| | - Carey N Lumeng
- Department of Pediatrics and Communicable Diseases, University of Michigan Medical School, Ann Arbor, Michigan
- Graduate Program in Immunology, Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, Michigan
- Graduate Program in Cellular and Molecular Biology, Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, Michigan
| | - Lonnie D Shea
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan
| | - Robert W O'Rourke
- Department of Surgery, University of Michigan Medical School, Ann Arbor, Michigan
- Department of Surgery, Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, Michigan
| |
Collapse
|
22
|
Liu S, Li Y, Fan X, Li K, Xu C, Zhang L, Luo M, Wang L, Li R, Wu J. Transplantation of adipose tissue lacking PAI-1 improves glucose tolerance and attenuates cardiac metabolic abnormalities in high-fat diet-induced obesity. Adipocyte 2020; 9:170-178. [PMID: 32272863 PMCID: PMC7153656 DOI: 10.1080/21623945.2020.1748961] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Adipose tissue is an important metabolic organ, and transplantation of white adipose tissue plays crucial roles in glucose homoeostasis and energy metabolism. However, how adipose tissue affects glucose utilization is poorly understood. PAI-1-knockout (PAI-1KO) mice were previously shown to be resistant to a high-fat diet and obesity. We used microPET/CT (positron emission tomography/computed tomography), gene microarray, and biochemical assays to measure changes in systemic and myocardial glucose metabolism in mice subjected to transplantation of adipose tissue from PAI-1KO and wild-type mice. Here, we show that transplanting subcutaneous white adipose tissue (scWAT) from PAI-1KO mice into high-fat diet (HFD)-fed mice reduced levels of serum total cholesterol and triglycerides, and improved glucose tolerance in the HFD-fed mice. microPET/CT imaging revealed that cardiac glucose uptake was increased in the heart but not in the liver, hindlimb muscles, or abdominal subcutaneous white adipose tissue in HFD-fed mice transplanted with PAI-1KO scWAT, suggesting that the transplanted PAI-1KO scWAT exerted endocrine effects in the heart. In addition, transplantation of scWAT from PAI-1KO mice upregulated mitochondrial gene expression in cardiac muscle, increased the expression of glucose transporters 1 and 4 in cardiac tissues and was associated with an increased NAD+/NADH ratio. Together, these findings suggest that modulating PAI-1 in scWAT may provide a promising approach for intervening in glucose metabolism.
Collapse
Affiliation(s)
- Sijing Liu
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, China
- Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China
| | - Yi Li
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, China
- Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China
| | - Xin Fan
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, China
- Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China
| | - Kai Li
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, China
- Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China
| | - Chunrong Xu
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, China
- Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China
| | - Liping Zhang
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, China
- Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China
| | - Mao Luo
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, China
- Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China
| | - Liqun Wang
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, China
- Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China
| | - Rong Li
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, China
- Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China
| | - Jianbo Wu
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, China
- Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China
| |
Collapse
|
23
|
Skeletal glucocorticoid signalling determines leptin resistance and obesity in aging mice. Mol Metab 2020; 42:101098. [PMID: 33045434 PMCID: PMC7596342 DOI: 10.1016/j.molmet.2020.101098] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/28/2020] [Accepted: 10/06/2020] [Indexed: 11/23/2022] Open
Abstract
Objective Aging and chronic glucocorticoid excess share a number of critical features, including the development of central obesity, insulin resistance and osteoporosis. Previous studies have shown that skeletal glucocorticoid signalling increases with aging and that osteoblasts mediate the detrimental skeletal and metabolic effects of chronic glucocorticoid excess. Here, we investigated whether endogenous glucocorticoid action in the skeleton contributes to metabolic dysfunction during normal aging. Methods Mice lacking glucocorticoid signalling in osteoblasts and osteocytes (HSD2OB/OCY-tg mice) and their wild-type littermates were studied until 3, 6, 12 and 18 months of age. Body composition, adipose tissue morphology, skeletal gene expression and glucose/insulin tolerance were assessed at each timepoint. Leptin sensitivity was assessed by arcuate nucleus STAT3 phosphorylation and inhibition of feeding following leptin administration. Tissue-specific glucose uptake and adipose tissue oxygen consumption rate were also measured. Results As they aged, wild-type mice became obese and insulin-resistant. In contrast, HSD2OB/OCY-tg mice remained lean and insulin-sensitive during aging. Obesity in wild-type mice was due to leptin resistance, evidenced by an impaired ability of exogenous leptin to suppress food intake and phosphorylate hypothalamic STAT3, from 6 months of age onwards. In contrast, HSD2OB/OCY-tg mice remained leptin-sensitive throughout the study. Compared to HSD2OB/OCY-tg mice, leptin-resistant wild-type mice displayed attenuated sympathetic outflow, with reduced tyrosine hydroxylase expression in both the hypothalamus and thermogenic adipose tissues. Adipose tissue oxygen consumption rate declined progressively in aging wild-type mice but was maintained in HSD2OB/OCY-tg mice. At 18 months of age, adipose tissue glucose uptake was increased 3.7-fold in HSD2OB/OCY-tg mice, compared to wild-type mice. Conclusions Skeletal glucocorticoid signalling is critical for the development of leptin resistance, obesity and insulin resistance during aging. These findings underscore the skeleton's importance in the regulation of body weight and implicate osteoblastic/osteocytic glucocorticoid signalling in the aetiology of aging-related obesity and metabolic disease. As they aged, wild-type CD1 mice became hyperphagic, obese and insulin-resistant. Mice lacking skeletal glucocorticoid signalling (HSD2OB/OCY-tg) were lean and healthy. Unlike wild-type mice, HSD2OB/OCY-tg mice remained leptin-sensitive during aging. Adipose tissue sympathetic outflow was maintained in aging HSD2OB/OCY-tg mice.
Collapse
|
24
|
Tsiloulis T, Raajendiran A, Keenan SN, Ooi G, Taylor RA, Burton P, Watt MJ. Impact of human visceral and glutealfemoral adipose tissue transplant on glycemic control in a mouse model of diet-induced obesity. Am J Physiol Endocrinol Metab 2020; 319:E519-E528. [PMID: 32603261 DOI: 10.1152/ajpendo.00373.2019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Regional distribution of adipose tissue is an important factor in conferring cardiometabolic risk and obesity-related morbidity. We tested the hypothesis that human visceral adipose tissue (VAT) impairs glucose homeostasis, whereas subcutaneous glutealfemoral adipose tissue (GFAT) protects against the development of impaired glucose homeostasis in mice. VAT and GFAT were collected from patients undergoing bariatric surgery and grafted onto the epididymal adipose tissue of weight- and age-matched severe, combined immunodeficient mice. SHAM mice underwent surgery without transplant of tissue. Mice were fed a high-fat diet after xenograft. Energy homeostasis, glucose metabolism, and insulin sensitivity were assessed 6 wk later. Xenograft of human adipose tissues was successful, as determined by histology, immunohistochemical evaluation of collagen deposition and angiogenesis, and maintenance of lipolytic function. Adipose tissue transplant did not affect energy expenditure, food intake, whole body substrate partitioning, or plasma free fatty acid, triglyceride, and insulin levels. Fasting blood glucose was significantly reduced in GFAT and VAT compared with SHAM, whereas glucose tolerance was improved only in mice transplanted with VAT compared with SHAM mice. This improvement was not associated with differences in whole body insulin sensitivity or plasma insulin between groups. Together, these data suggest that VAT improves glycemic control and GFAT does not protect against the development of high-fat diet-induced glucose intolerance. Hence, the intrinsic properties of VAT and GFAT do not necessarily explain the postulated negative and positive effects of these adipose tissue depots on metabolic health.
Collapse
Affiliation(s)
- Thomas Tsiloulis
- Department of Physiology, Faculty of Medicine, Nursing and Health Sciences, Monash University, Clayton, Victoria, Australia
- Monash Biomedicine Discovery Institute; Metabolism, Diabetes and Obesity and Cancer Programs. Monash University, Clayton, Victoria, Australia
| | - Arthe Raajendiran
- Department of Physiology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Victoria, Australia
| | - Stacey N Keenan
- Department of Physiology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Victoria, Australia
| | - Geraldine Ooi
- Centre for Obesity Research and Education, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Victoria, Australia
| | - Renea A Taylor
- Department of Physiology, Faculty of Medicine, Nursing and Health Sciences, Monash University, Clayton, Victoria, Australia
- Monash Biomedicine Discovery Institute; Metabolism, Diabetes and Obesity and Cancer Programs. Monash University, Clayton, Victoria, Australia
- Cancer Research Division, Peter MacCallum Cancer Centre, Victorian Comprehensive Cancer Centre, Parkville, Australia
| | - Paul Burton
- Centre for Obesity Research and Education, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Victoria, Australia
| | - Matthew J Watt
- Department of Physiology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Victoria, Australia
| |
Collapse
|
25
|
Lu Z, Li Y, Song J. Characterization and Treatment of Inflammation and Insulin Resistance in Obese Adipose Tissue. Diabetes Metab Syndr Obes 2020; 13:3449-3460. [PMID: 33061505 PMCID: PMC7535138 DOI: 10.2147/dmso.s271509] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 09/01/2020] [Indexed: 12/12/2022] Open
Abstract
Adipose tissue is the largest energy storage and protection organ. It is distributed subcutaneously and around the internal organs. It regulates metabolism by storing and releasing fatty acids and secreting adipokines. Excessive nutritional intake results in adipocyte hypertrophy and proliferation, leading to local hypoxia in adipose tissue and changes in the release of adipokines. These lead to recruit of more immune cells into adipose tissue and release of inflammatory signaling factors. Excess free fatty acids and inflammatory factors interfere with intracellular insulin signaling. In this review, we summarize the characteristics of obese adipose tissue and analyze how its inflammation causes insulin resistance. We further discuss the latest clinical research progress on the control of insulin resistance and inflammation resulting from obesity through anti-inflammatory therapy and bariatric surgery. Our review shows that targeted anti-inflammatory therapy is of great significance for obese patients with insulin resistance.
Collapse
Affiliation(s)
- Zhenhua Lu
- Department of General Surgery, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, People’s Republic of China
| | - Yao Li
- Department of General Surgery, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, People’s Republic of China
| | - Jinghai Song
- Department of General Surgery, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, People’s Republic of China
- Correspondence: Jinghai Song Department of General Surgery, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, No. 1 DaHua Road, Dong Dan, Beijing100730, People’s Republic of ChinaTel +8619800315020 Email
| |
Collapse
|
26
|
Laukka M, Hoppela E, Salo J, Rantakari P, Gronroos TJ, Orte K, Auvinen K, Salmi M, Gerke H, Thol K, Peuhu E, Kauhanen S, Merilahti P, Hartiala P. Preperitoneal Fat Grafting Inhibits the Formation of Intra-abdominal Adhesions in Mice. J Gastrointest Surg 2020; 24:2838-2848. [PMID: 31823326 PMCID: PMC7674570 DOI: 10.1007/s11605-019-04425-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 09/25/2019] [Indexed: 01/31/2023]
Abstract
BACKGROUND Adhesion formation contributes to postoperative complications in abdominal and gynaecological surgery. Thus far, the prevention and treatment strategies have focused on mechanical barriers in solid and liquid form, but these methods are not in routine use. As autologous fat grafting has become popular in treatment of hypertrophic scars because of its immunomodulatory effects, we postulated that fat grafting could also prevent peritoneal adhesion through similar mechanisms. METHODS This was a control versus intervention study to evaluate the effect of fat grafting in the prevention on peritoneal adhesion formation. An experimental mouse model for moderate and extensive peritoneal adhesions was used (n = 4-6 mice/group). Adhesions were induced mechanically, and a free epididymal fat graft from wild type or CAG-DsRed mice was injected preperitoneally immediately after adhesion induction. PET/CT imaging and scaling of the adhesions were performed, and samples were taken for further analysis at 7 and 30 days postoperation. Macrophage phenotyping was further performed from peritoneal lavage samples, and the expression of inflammatory cytokines and mesothelial layer recovery were analysed from peritoneal tissue samples. RESULTS Fat grafting significantly inhibited the formation of adhesions. PET/CT results did not show prolonged inflammation in any of the groups. While the expression of anti-inflammatory and anti-fibrotic IL-10 was significantly increased in the peritoneum of the fat graft-treated group at 7 days, tissue-resident and repairing M2 macrophages could no longer be detected in the fat graft at this time point. The percentage of the continuous, healed peritoneum as shown by Keratin 8 staining was greater in the fat graft-treated group after 7 days. CONCLUSIONS Fat grafting can inhibit the formation of peritoneal adhesions in mice. Our results suggest that fat grafting promotes the peritoneal healing process in a paracrine manner thereby enabling rapid regeneration of the peritoneal mesothelial cell layer.
Collapse
Affiliation(s)
- Mervi Laukka
- Department of Plastic and General Surgery, Turku University Hospital, Turku, Finland ,Institute of Biomedicine, University of Turku, Turku, Finland
| | - Erika Hoppela
- Department of Plastic and General Surgery, Turku University Hospital, Turku, Finland
| | - Jemiina Salo
- Institute of Biomedicine, University of Turku, Turku, Finland
| | - Pia Rantakari
- Institute of Biomedicine, University of Turku, Turku, Finland
| | - Tove J. Gronroos
- Turku PET Centre, University of Turku, Turku, Finland ,Medicity Research Laboratories, University of Turku, Turku, Finland
| | - Katri Orte
- Genetics and Saske Tyks Laboratory Division, Turku University Hospital, Turku, Finland
| | - Kaisa Auvinen
- Institute of Biomedicine, University of Turku, Turku, Finland ,Medicity Research Laboratories, University of Turku, Turku, Finland
| | - Marko Salmi
- Institute of Biomedicine, University of Turku, Turku, Finland ,Medicity Research Laboratories, University of Turku, Turku, Finland
| | - Heidi Gerke
- Institute of Biomedicine, University of Turku, Turku, Finland
| | - Kerstin Thol
- Centre for Biotechnology, University of Turku, Turku, Finland
| | - Emilia Peuhu
- Centre for Biotechnology, University of Turku, Turku, Finland ,FICAN West Cancer Laboratory, Turku University Hospital and University of Turku, Turku, Finland
| | - Saila Kauhanen
- Department of Gastrointestinal Surgery, Turku University Hospital, Turku, Finland
| | - Pirjo Merilahti
- Institute of Biomedicine, University of Turku, Turku, Finland
| | - Pauliina Hartiala
- Department of Plastic and General Surgery, Turku University Hospital, Turku, Finland ,Institute of Biomedicine, University of Turku, Turku, Finland
| |
Collapse
|
27
|
Ivanov AN, Popyhova EB, Stepanova TV, Pronina EA, Lagutina DD. Changes in microcirculation induced by autotransplantation of skin flaps in experimental diabetes mellitus rats. ACTA ACUST UNITED AC 2019. [DOI: 10.24884/1682-6655-2019-18-4-72-80] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Introduction. Micro- and macroangiopathies significantly reduce the duration and quality of life for diabetes mellitus (DM) patients, which determines the relevance of developing new ways to treat them, including non-drug ones. One of such methods is the autotransplantation of full-thickness skin flap providing a distant stimulating effect on microcirculation.The aim of the study was to investigate the influence of skin flap autotransplantation on microcirculation at alloxan insulin deficiency in white rats.Material and methods. The studies were carried out on 60 male scrub rats divided into the following groups: the control group, the comparison group (alloxan diabetes rats), the experimental group consisting of alloxan diabetes animals which had skin flap autotransplantations performed on them. Skin microcirculation (MC) of the dorsum of the feet was studied by laser Doppler flowmetry.Results. Alloxan insulin deficiency caused a violation of the MC in rats which manifested by a decrease in perfusion of the skin of the dorsum of the foot in association with a decrease in the amplitudes of endothelial and neurogenic oscillations. On the 42nd day of the experiment in alloxan diabetes animals which had skin flap autotransplantations performed on them the statistically significant increase (p=0.000001) in the perfusion index by 43 % was observed attesting to microcirculation improvment. This was accompanied by an increase in the normalized amplitudes value of endothelial (by 44 %, р=0.000047) and neurogenic (by 20 %, р=0.019515) perfusion fluctuations relative to rats of the comparison group.Conclusions. It can be concluded that skin flap autotransplantation has a positive effect on the state of MC in the feet in experimental diabetes rats due to the improvement of tissue perfusion and modulation of its activity.
Collapse
Affiliation(s)
- A. N. Ivanov
- Saratov State Medical University named after V. I. Razumovsky
| | - E. B. Popyhova
- Saratov State Medical University named after V. I. Razumovsky
| | - T. V. Stepanova
- Saratov State Medical University named after V. I. Razumovsky
| | - E. A. Pronina
- Saratov State Medical University named after V. I. Razumovsky
| | - D. D. Lagutina
- Saratov State Medical University named after V. I. Razumovsky
| |
Collapse
|
28
|
Clinical impact of visceral-to-subcutaneous fat ratio in patients with acute aortic dissection. PLoS One 2019; 14:e0226642. [PMID: 31869368 PMCID: PMC6927613 DOI: 10.1371/journal.pone.0226642] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 12/01/2019] [Indexed: 01/07/2023] Open
Abstract
Background Obesity has increased worldwide. Although the visceral-to-subcutaneous fat ratio (VS ratio) is an established risk factor for cardiovascular disease, its clinical impact on the long-term prognosis of patients with acute aortic dissection (AAD) remains unclear. Materials and methods This retrospective study included 111 patients with AAD admitted to our hospital from 2013 to 2016. Patients who died during hospitalization, and those diagnosed with Marfan’s syndrome were excluded. Visceral and subcutaneous fat accumulation (VFA, SFA) at umbilical level were calculated on a dedicated workstation. Major Adverse Cardiovascular and Cerebrovascular Events (MACCE) and worsening renal function (WRF) at 3 years were evaluated. Results Patient characteristics were as below: age, 73 ± 13; male, 55%; Stanford type A, 53%. Average VFA, SFA, and VS ratio on admission were 98 (52–145) cm2, 141 (90–185) cm2, and 0.75 (0.47–0.97), respectively. VFA was higher in male than in female (male, 134 [84–179] cm2; female, 71 [46–99] cm2; p < 0.001), whereas SFA was similar (male, 141 [91–174] cm2: female, 134 [90–205] cm2; p = 0.687). VS ratio was also higher in male (male, 0.88 [0.75–1.17]; female, 0.49 [0.39–0.65]; p < 0.001). Both MACCE and WRF at 3 years were observed in 17 (15%) and 32 (29%) patients, respectively. Multivariate Cox regression analysis demonstrated that VS ratio tended to be associated with the 3-year MACCE (HR for an increase of 0.5 unit, 1.49; 95% CI, 0.99–2.24; p = 0.056). This result persisted in male (HR for an increase of 0.5 unit, 1.54; 95% CI, 0.96–2.48; p = 0.073) but not female. The VS ratio was not related to the 3-year WRF. Conclusion The VS ratio tends to be associated with the 3-year MACCE in patients with AAD. This finding is inconclusive owing to a small sample and low incidence of adverse events. Further studies with larger samples are needed to confirm the clinical significance of VS ratio.
Collapse
|
29
|
Myeloid cell deletion of Aryl hydrocarbon Receptor Nuclear Translocator (ARNT) induces non-alcoholic steatohepatitis. PLoS One 2019; 14:e0225332. [PMID: 31800592 PMCID: PMC6892561 DOI: 10.1371/journal.pone.0225332] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 11/01/2019] [Indexed: 12/12/2022] Open
Abstract
Background and aim Non-alcoholic steatohepatitis (NASH) is predicted to become the most common cause of cirrhosis and liver failure. Risk factors include obesity, insulin resistance and diabetes. Macrophages and other myeloid cells play crucial roles in initiating and driving inflammation. Aryl hydrocarbon Receptor Nuclear Translocator (ARNT) is a transcription factor which binds to a range of partners to mediate responses to environmental signals, including the diet. In people with diabetes it is decreased in liver. We hypothesised that myeloid cell ARNT activity may contribute to the development of liver pathology. Methods Floxed-ARNT mice were bred with LysM-Cre mice to generate mice with reduced ARNT in myeloid cells. Animals were fed a high fat diet (HFD) and liver pathology was assessed. Histology, mRNA, fat accumulation and metabolism were studied. Results Animals with reduced myeloid ARNT developed steatohepatitis on a HFD, with additional alterations of metabolism and fat deposition. Steatohepatitis was accompanied by hepatic macrophage infiltration and expression of both M1 and M2 markers. Expression of mRNAs for Cxcl1, Mcp-1, Tnf-α and Tgf-β1 were increased. Human livers from controls and people with NASH were tested; ARNT mRNA was decreased by 80% (p = 0.0004). Conclusions Decreased myeloid ARNT may play a role in the conversion from non-alcoholic fatty liver to steatohepatitis. Increasing ARNT may be a therapeutic strategy to reduce NASH.
Collapse
|
30
|
Hwang I, Kim JB. Two Faces of White Adipose Tissue with Heterogeneous Adipogenic Progenitors. Diabetes Metab J 2019; 43:752-762. [PMID: 31902145 PMCID: PMC6943255 DOI: 10.4093/dmj.2019.0174] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 10/28/2019] [Indexed: 12/25/2022] Open
Abstract
Chronic energy surplus increases body fat, leading to obesity. Since obesity is closely associated with most metabolic complications, pathophysiological roles of adipose tissue in obesity have been intensively studied. White adipose tissue is largely divided into subcutaneous adipose tissue (SAT) and visceral adipose tissue (VAT). These two white adipose tissues are similar in their appearance and lipid storage functions. Nonetheless, emerging evidence has suggested that SAT and VAT have different characteristics and functional roles in metabolic regulation. It is likely that there are intrinsic differences between VAT and SAT. In diet-induced obese animal models, it has been reported that adipogenic progenitors in VAT rapidly proliferate and differentiate into adipocytes. In obesity, VAT exhibits elevated inflammatory responses, which are less prevalent in SAT. On the other hand, SAT has metabolically beneficial effects. In this review, we introduce recent studies that focus on cellular and molecular components modulating adipogenesis and immune responses in SAT and VAT. Given that these two fat depots show different functions and characteristics depending on the nutritional status, it is feasible to postulate that SAT and VAT have different developmental origins with distinct adipogenic progenitors, which would be a key determining factor for the response and accommodation to metabolic input for energy homeostasis.
Collapse
Affiliation(s)
- Injae Hwang
- National Creative Research Initiatives Center for Adipose Tissue Remodeling, Institute of Molecular Biology and Genetics, Department of Biological Sciences, Seoul National University, Seoul, Korea
| | - Jae Bum Kim
- National Creative Research Initiatives Center for Adipose Tissue Remodeling, Institute of Molecular Biology and Genetics, Department of Biological Sciences, Seoul National University, Seoul, Korea.
| |
Collapse
|
31
|
Murillo AL, Kaiser KA, Smith DL, Peterson CM, Affuso O, Tiwari HK, Allison DB. A Systematic Scoping Review of Surgically Manipulated Adipose Tissue and the Regulation of Energetics and Body Fat in Animals. Obesity (Silver Spring) 2019; 27:1404-1417. [PMID: 31361090 PMCID: PMC6707830 DOI: 10.1002/oby.22511] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 03/13/2019] [Indexed: 01/03/2023]
Abstract
OBJECTIVE Surgical manipulations of adipose tissue by removal, or partial lipectomy, have demonstrated body fat compensation and recovered body weight, suggesting that the body is able to resist changes to body composition. However, the mechanisms underlying these observations are not well understood. The purpose of this scoping review is to provide an update on what is currently known about the regulation of energetics and body fat after surgical manipulations of adipose tissue in small mammals. METHODS PubMed and Scopus were searched to identify 64 eligible studies. Outcome measures included body fat, body weight, food intake, and circulating biomarkers. RESULTS Surgeries performed included lipectomy (72%) or transplantation (12%) in mice (35%), rats (35%), and other small mammals. Findings suggested that lipectomy did not have consistent long-term effects on reducing body weight and fat because regain occurred within 12 to 14 weeks post surgery. Hence, biological feedback mechanisms act to resist long-term changes of body weight or fat. Furthermore, whether this weight and fat regain occurred because of "passive" and "active" regulation under the "set point" or "settling point" theories cannot fully be discerned because of limitations in study designs and data collected. CONCLUSIONS The regulation of energetics and body fat are complex and dynamic processes that require further studies of the interplay of genetic, physiological, and behavioral factors.
Collapse
Affiliation(s)
| | - Kathryn A. Kaiser
- Nutrition Obesity Research Center Birmingham, Alabama, United States
- Department of Health Behavior Birmingham, Alabama, United States
| | - Daniel L. Smith
- Nutrition Obesity Research Center Birmingham, Alabama, United States
- Department of Nutrition Sciences Birmingham, Alabama, United States
| | - Courtney M. Peterson
- Nutrition Obesity Research Center Birmingham, Alabama, United States
- Department of Nutrition Sciences Birmingham, Alabama, United States
| | - Olivia Affuso
- Nutrition Obesity Research Center Birmingham, Alabama, United States
- Department of Epidemiology at the University of Alabama at Birmingham, Birmingham, Alabama, United States
| | | | - David B. Allison
- Department of Epidemiology and Biostatistics, School of Public Health, Indiana University-Bloomington, Bloomington, Indiana, United States
| |
Collapse
|
32
|
Li R, Li K, Zhang L, Wang L, Chen N, Deng X, Luo M, Wu J. Autologous transplantation of photoactivated subcutaneous adipose tissue improves glucose homeostasis in high-fat diet-induced obese mice. J Tissue Eng Regen Med 2019; 13:1609-1617. [PMID: 31216384 DOI: 10.1002/term.2913] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Revised: 05/22/2019] [Accepted: 06/07/2019] [Indexed: 12/21/2022]
Abstract
Increasing evidence indicates that normal adipose tissue transplantation improves whole-body energy metabolism and glucose homeostasis in a high-fat diet (HFD)-induced obese mouse model. Adipose tissue macrophages are associated with glucose homeostasis and insulin resistance in type 2 diabetes and obesity in humans, offering a potential target for therapeutics. However, whether transplantation of autologous adipose tissue that changes the macrophage phenotype directly contributes to systemic glucose intolerance has not been determined. We specifically developed our device, with more refined wavelengths of light to activate the macrophage phenotype in isolated subcutaneous white adipose tissue (sWAT) from host HFD mice. Autologous transplantation of photoactivated sWAT into HFD mice significantly reverses the M1 macrophage phenotype into M2, reduces the infiltration of macrophages in adipose tissues of HFD mice, and decreases the levels of proinflammatory cytokines. Strikingly, this transplantation reduced blood glucose levels and caused significant improvement in glucose tolerance, which was not shown in sham-operated or nonphotoactivated sWAT-transplanted HFD mice. Moreover, positron emission/computed tomography scans indicated higher glucose uptake in the heart but not in the liver, hindlimb muscles, or abdominal sWAT. These data suggested that the ability of photoactivation to shift Adipose tissue macrophage polarization in HFD mice caused a significant improvement in glucose homeostasis and that autologous transplantation might be a promising therapeutic option for the treatment of diabetes.
Collapse
Affiliation(s)
- Rong Li
- Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Reseach Center of Southwest Medical University, Luzhou, China
| | - Kai Li
- Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Reseach Center of Southwest Medical University, Luzhou, China
| | - Liping Zhang
- Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Reseach Center of Southwest Medical University, Luzhou, China
| | - Lin Wang
- Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Reseach Center of Southwest Medical University, Luzhou, China
| | - Ni Chen
- Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Reseach Center of Southwest Medical University, Luzhou, China
| | - Xin Deng
- Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Reseach Center of Southwest Medical University, Luzhou, China
| | - Mao Luo
- Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Reseach Center of Southwest Medical University, Luzhou, China
| | - Jianbo Wu
- Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Reseach Center of Southwest Medical University, Luzhou, China.,Harmony Regena Inc., Luzhou, China
| |
Collapse
|
33
|
Banhos Danneskiold-Samsøe N, Sonne SB, Larsen JM, Hansen AN, Fjære E, Isidor MS, Petersen S, Henningsen J, Severi I, Sartini L, Schober Y, Wolf J, Nockher WA, Wolfrum C, Cinti S, Sina C, Hansen JB, Madsen L, Brix S, Kristiansen K. Overexpression of cyclooxygenase-2 in adipocytes reduces fat accumulation in inguinal white adipose tissue and hepatic steatosis in high-fat fed mice. Sci Rep 2019; 9:8979. [PMID: 31222118 PMCID: PMC6586826 DOI: 10.1038/s41598-019-45062-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 05/30/2019] [Indexed: 12/16/2022] Open
Abstract
Cyclooxygenases are known as important regulators of metabolism and immune processes via conversion of C20 fatty acids into various regulatory lipid mediators, and cyclooxygenase activity has been implicated in browning of white adipose tissues. We generated transgenic (TG) C57BL/6 mice expressing the Ptgs2 gene encoding cyclooxygenase-2 (COX-2) in mature adipocytes. TG mice fed a high-fat diet displayed marginally lower weight gain with less hepatic steatosis and a slight improvement in insulin sensitivity, but no difference in glucose tolerance. Compared to littermate wildtype mice, TG mice selectively reduced inguinal white adipose tissue (iWAT) mass and fat cell size, whereas the epididymal (eWAT) fat depot remained unchanged. The changes in iWAT were accompanied by increased levels of specific COX-derived lipid mediators and increased mRNA levels of interleukin-33, interleukin-4 and arginase-1, but not increased expression of uncoupling protein 1 or increased energy expenditure. Epididymal WAT (eWAT) in TG mice exhibited few changes except from increased infiltration with eosinophils. Our findings suggest a role for COX-2-derived lipid mediators from adipocytes in mediating type 2 immunity cues in subcutaneous WAT associated with decreased hepatic steatosis, but with no accompanying induction of browning and increased energy expenditure.
Collapse
Affiliation(s)
- Niels Banhos Danneskiold-Samsøe
- Laboratory of Genomics and Molecular Biomedicine, Department of Biology, University of Copenhagen, Universitetsparken 13, DK-2100, Copenhagen, Denmark
| | - Si Brask Sonne
- Laboratory of Genomics and Molecular Biomedicine, Department of Biology, University of Copenhagen, Universitetsparken 13, DK-2100, Copenhagen, Denmark
| | - Jeppe Madura Larsen
- National Food Institute, Technical University of Denmark, DK-2800 Kgs., Lyngby, Denmark
| | - Ann Normann Hansen
- Laboratory of Genomics and Molecular Biomedicine, Department of Biology, University of Copenhagen, Universitetsparken 13, DK-2100, Copenhagen, Denmark
| | - Even Fjære
- Institute of Marine Research, P.O. Box 7800, 5020, Bergen, Norway
| | - Marie Sophie Isidor
- Laboratory of Genomics and Molecular Biomedicine, Department of Biology, University of Copenhagen, Universitetsparken 13, DK-2100, Copenhagen, Denmark
| | - Sidsel Petersen
- Laboratory of Genomics and Molecular Biomedicine, Department of Biology, University of Copenhagen, Universitetsparken 13, DK-2100, Copenhagen, Denmark
| | - Jeanette Henningsen
- Laboratory of Genomics and Molecular Biomedicine, Department of Biology, University of Copenhagen, Universitetsparken 13, DK-2100, Copenhagen, Denmark
| | - Ilenia Severi
- School of Medicine, Department of Experimental and Clinical Medicine, Division of Neuroscience and Cell Biology, Università Politecnica delle Marche, via Tronto 10/A, 60020, Ancona, Italy
| | - Loris Sartini
- School of Medicine, Department of Experimental and Clinical Medicine, Division of Neuroscience and Cell Biology, Università Politecnica delle Marche, via Tronto 10/A, 60020, Ancona, Italy
| | - Yvonne Schober
- Institute of Laboratory Medicine and Pathobiochemistry, Molecular Diagnostics, Philipps University Marburg, University Hospital Giessen and Marburg, Campus Marburg, Baldingerstrasse, 35043, Marburg, Germany
| | - Jacqueline Wolf
- Institute of Laboratory Medicine and Pathobiochemistry, Molecular Diagnostics, Philipps University Marburg, University Hospital Giessen and Marburg, Campus Marburg, Baldingerstrasse, 35043, Marburg, Germany
| | - W Andreas Nockher
- Institute of Laboratory Medicine and Pathobiochemistry, Molecular Diagnostics, Philipps University Marburg, University Hospital Giessen and Marburg, Campus Marburg, Baldingerstrasse, 35043, Marburg, Germany
| | - Christian Wolfrum
- Institute of Food Nutrition and Health, ETH Zürich, SLA C94, Schorenstrasse 16, CH-8603, Schwerzenbach, Switzerland
| | - Saverio Cinti
- School of Medicine, Department of Experimental and Clinical Medicine, Division of Neuroscience and Cell Biology, Università Politecnica delle Marche, via Tronto 10/A, 60020, Ancona, Italy
| | - Christian Sina
- Institute of Nutritional Medicine, Department of Internal Medicine I, University Hospital of Schleswig-Holstein, Ratzeburger Allee 160, 23538, Lübeck, Germany
| | - Jacob B Hansen
- Laboratory of Genomics and Molecular Biomedicine, Department of Biology, University of Copenhagen, Universitetsparken 13, DK-2100, Copenhagen, Denmark
| | - Lise Madsen
- Laboratory of Genomics and Molecular Biomedicine, Department of Biology, University of Copenhagen, Universitetsparken 13, DK-2100, Copenhagen, Denmark. .,Institute of Marine Research, P.O. Box 7800, 5020, Bergen, Norway.
| | - Susanne Brix
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark.
| | - Karsten Kristiansen
- Laboratory of Genomics and Molecular Biomedicine, Department of Biology, University of Copenhagen, Universitetsparken 13, DK-2100, Copenhagen, Denmark. .,Institute of Metagenomics, BGI-Shenzhen, BGI-Shenzhen, Shenzhen, 518083, China.
| |
Collapse
|
34
|
GABA-stimulated adipose-derived stem cells suppress subcutaneous adipose inflammation in obesity. Proc Natl Acad Sci U S A 2019; 116:11936-11945. [PMID: 31160440 DOI: 10.1073/pnas.1822067116] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Accumulating evidence suggests that subcutaneous and visceral adipose tissues are differentially associated with metabolic disorders. In obesity, subcutaneous adipose tissue is beneficial for metabolic homeostasis because of repressed inflammation. However, the underlying mechanism remains unclear. Here, we demonstrate that γ-aminobutyric acid (GABA) sensitivity is crucial in determining fat depot-selective adipose tissue macrophage (ATM) infiltration in obesity. In diet-induced obesity, GABA reduced monocyte migration in subcutaneous inguinal adipose tissue (IAT), but not in visceral epididymal adipose tissue (EAT). Pharmacological modulation of the GABAB receptor affected the levels of ATM infiltration and adipose tissue inflammation in IAT, but not in EAT, and GABA administration ameliorated systemic insulin resistance and enhanced insulin-dependent glucose uptake in IAT, accompanied by lower inflammatory responses. Intriguingly, compared with adipose-derived stem cells (ADSCs) from EAT, IAT-ADSCs played key roles in mediating GABA responses that repressed ATM infiltration in high-fat diet-fed mice. These data suggest that selective GABA responses in IAT contribute to fat depot-selective suppression of inflammatory responses and protection from insulin resistance in obesity.
Collapse
|
35
|
Silva KR, Baptista LS. Adipose-derived stromal/stem cells from different adipose depots in obesity development. World J Stem Cells 2019; 11:147-166. [PMID: 30949294 PMCID: PMC6441940 DOI: 10.4252/wjsc.v11.i3.147] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Revised: 01/27/2019] [Accepted: 02/28/2019] [Indexed: 02/06/2023] Open
Abstract
The increasing prevalence of obesity is alarming because it is a risk factor for cardiovascular and metabolic diseases (such as type 2 diabetes). The occurrence of these comorbidities in obese patients can arise from white adipose tissue (WAT) dysfunctions, which affect metabolism, insulin sensitivity and promote local and systemic inflammation. In mammals, WAT depots at different anatomical locations (subcutaneous, preperitoneal and visceral) are highly heterogeneous in their morpho-phenotypic profiles and contribute differently to homeostasis and obesity development, depending on their ability to trigger and modulate WAT inflammation. This heterogeneity is likely due to the differential behavior of cells from each depot. Numerous studies suggest that adipose-derived stem/stromal cells (ASC; referred to as adipose progenitor cells, in vivo) with depot-specific gene expression profiles and adipogenic and immunomodulatory potentials are keys for the establishment of the morpho-functional heterogeneity between WAT depots, as well as for the development of depot-specific responses to metabolic challenges. In this review, we discuss depot-specific ASC properties and how they can contribute to the pathophysiology of obesity and metabolic disorders, to provide guidance for researchers and clinicians in the development of ASC-based therapeutic approaches.
Collapse
Affiliation(s)
- Karina Ribeiro Silva
- Laboratory of Tissue Bioengineering, Directory of Metrology Applied to Life Sciences, National Institute of Metrology, Quality and Technology, Duque de Caxias, RJ 25250-020, Brazil
- Post-Graduation Program of Biotechnology, National Institute of Metrology, Quality and Technology, Duque de Caxias, RJ 25250-020, Brazil
| | - Leandra Santos Baptista
- Laboratory of Tissue Bioengineering, Directory of Metrology Applied to Life Sciences, National Institute of Metrology, Quality and Technology, Duque de Caxias, RJ 25250-020, Brazil
- Post-Graduation Program of Biotechnology, National Institute of Metrology, Quality and Technology, Duque de Caxias, RJ 25250-020, Brazil
- Multidisciplinary Center for Biological Research (Numpex-Bio), Federal University of Rio de Janeiro Campus Duque de Caxias, Duque de Caxias, RJ 25245-390, Brazil
| |
Collapse
|
36
|
Zhu M, Xue J, Lu S, Yuan Y, Liao Y, Qiu J, Liu C, Liao Q. Anti-inflammatory effect of stromal vascular fraction cells in fat transplantation. Exp Ther Med 2018; 17:1435-1439. [PMID: 30680025 DOI: 10.3892/etm.2018.7082] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 07/30/2018] [Indexed: 01/10/2023] Open
Abstract
In previous studies, it has been demonstrated that the stromal vascular fraction (SVF) promoted the retention rate of grafts following fat transplantation through its angiogenic properties. However, the effect of SVF on inflammatory response subsequent to fat transplantation remains unclear. Fat from C57 mice were mixed with green fluorescent protein (GFP) SVF cells or phosphate-buffered saline and transplanted into C57BL/6 mice. The graft was harvested and immunofluorescent staining was performed on 1, 7, 14 and 30 days. The numbers of vessels and macrophages, as well as the inflammation level, in the two groups were evaluated. Although the GFP fluorescence indicated that most SVF cells were dead following transplantation, there was a higher graft retention rate in the SVF-assisted group compared with the control group. The SVF-assisted group also presented higher expression levels of interleukin (IL)-6 and tumor necrosis factor-α, and lower levels of IL-10, as well as increased M2 macrophages in comparison with the control group. Therefore, the results indicated that SVF promoted the retention rate of grafts following fat transplantation through the well-known pro-angiogenic mechanism (paracrine function and involvement in the formation of new vessels), as well as through the anti-inflammatory property of SVF (expression and suppression of various cytokines and conversion of the macrophage phenotype).
Collapse
Affiliation(s)
- Ming Zhu
- Department of Dermatology, Guangdong Provincial Corps Hospital of Chinese People's Armed Police Forces, Guangzhou Medical University, Guangzhou, Guangdong 510000, P.R. China
| | - Jian Xue
- Department of Dermatology, Guangdong Provincial Corps Hospital of Chinese People's Armed Police Forces, Guangzhou Medical University, Guangzhou, Guangdong 510000, P.R. China
| | - Shiliang Lu
- Department of Dermatology, Guangdong Provincial Corps Hospital of Chinese People's Armed Police Forces, Guangzhou Medical University, Guangzhou, Guangdong 510000, P.R. China
| | - Yi Yuan
- Department of Plastic and Reconstructive Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Yunjun Liao
- Department of Plastic and Reconstructive Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Jingjing Qiu
- Department of Dermatology, Guangdong Provincial Corps Hospital of Chinese People's Armed Police Forces, Guangzhou Medical University, Guangzhou, Guangdong 510000, P.R. China
| | - Cheng Liu
- Department of Dermatology, Guangdong Provincial Corps Hospital of Chinese People's Armed Police Forces, Guangzhou Medical University, Guangzhou, Guangdong 510000, P.R. China
| | - Qingting Liao
- Department of Dermatology, Guangdong Provincial Corps Hospital of Chinese People's Armed Police Forces, Guangzhou Medical University, Guangzhou, Guangdong 510000, P.R. China
| |
Collapse
|
37
|
Visceral fat-related systemic inflammation and the adolescent brain: a mediating role of circulating glycerophosphocholines. Int J Obes (Lond) 2018; 43:1223-1230. [PMID: 30206338 DOI: 10.1038/s41366-018-0202-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 05/24/2018] [Accepted: 06/10/2018] [Indexed: 12/20/2022]
Abstract
OBJECTIVE Life-long maintenance of brain health is important for the prevention of cognitive impairment in older age. Low-grade peripheral inflammation associated with excess visceral fat (VF) may influence brain structure and function. Here we examined (i) if this type of inflammation is associated with altered white-matter (WM) microstructure and lower cognitive functioning in adolescents, and (ii) if recently identified circulating glycerophosphocholines (GPCs) can index this type of inflammation and associated variations in WM microstructure and cognitive functioning. SUBJECTS We studied a community-based sample of 872 adolescents (12-18 years, 48% males) in whom we assessed VF and WM microstructure with magnetic resonance imaging, processing speed with cognitive testing, serum C-reactive protein (CRP, a common marker of peripheral inflammation) with a high-sensitivity assay, and serum levels of a panel of 64 GPCs with advanced mass spectrometry. RESULTS VF was associated with CRP, and CRP in turn was associated with "altered" WM microstructure and lower processing speed (all p < 0.003). Further, "altered" WM microstructure was associated with lower processing speed (p < 0.0001). Of all 64 tested GPCs, 4 were associated with both VF and CRP (at Bonferroni corrected p < 0.0004). One of them, PC16:0/2:0, was also associated with WM microstructure (p < 0.0001) and processing speed (p = 0.0003), and mediated the directed associations between VF and both WM microstructure (p < 0.0001) and processing speed (p = 0.02). As a mediator, PC16:0/2:0 explained 21% of shared variance between VF and WM microstructure, and 22% of shared variance between VF and processing speed. Similar associations were observed in an auxiliary study of 80 middle-aged adults. CONCLUSIONS Our results show that VF-related peripheral inflammation is associated with "altered" WM microstructure and lower cognitive functioning already in adolescents, and a specific circulating GPC may be a new molecule indexing this VF-related peripheral inflammation and its influences on brain structure and function.
Collapse
|
38
|
Unamuno X, Gómez-Ambrosi J, Rodríguez A, Becerril S, Frühbeck G, Catalán V. Adipokine dysregulation and adipose tissue inflammation in human obesity. Eur J Clin Invest 2018; 48:e12997. [PMID: 29995306 DOI: 10.1111/eci.12997] [Citation(s) in RCA: 341] [Impact Index Per Article: 56.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 07/10/2018] [Indexed: 12/13/2022]
Abstract
Obesity, a worldwide epidemic, confers increased risk for multiple serious conditions, including type 2 diabetes, cardiovascular diseases, nonalcoholic fatty liver disease and cancer. Adipose tissue is considered one of the largest endocrine organs in the body as well as an active tissue for cellular reactions and metabolic homeostasis rather than an inert tissue for energy storage. The functional pleiotropism of adipose tissue relies on its ability to synthesize and release a large number of hormones, cytokines, extracellular matrix proteins and growth and vasoactive factors, collectively termed adipokines that influence a variety of physiological and pathophysiological processes. In the obese state, excessive visceral fat accumulation causes adipose tissue dysfunctionality that strongly contributes to the onset of obesity-related comorbidities. The mechanisms underlying adipose tissue dysfunction include adipocyte hypertrophy and hyperplasia, increased inflammation, impaired extracellular matrix remodelling and fibrosis together with an altered secretion of adipokines. This review describes how adipose tissue becomes inflamed in obesity and summarizes key players and molecular mechanisms involved in adipose inflammation.
Collapse
Affiliation(s)
- Xabier Unamuno
- Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Pamplona, Spain
| | - Javier Gómez-Ambrosi
- Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Pamplona, Spain.,Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain
| | - Amaia Rodríguez
- Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Pamplona, Spain.,Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain
| | - Sara Becerril
- Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Pamplona, Spain.,Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain
| | - Gema Frühbeck
- Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Pamplona, Spain.,Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain.,Department of Endocrinology & Nutrition, Clínica Universidad de Navarra, Pamplona, Spain
| | - Victoria Catalán
- Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Pamplona, Spain.,Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain
| |
Collapse
|
39
|
Fat Grafting Can Induce Browning of White Adipose Tissue. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2018; 6:e1804. [PMID: 30276049 PMCID: PMC6157953 DOI: 10.1097/gox.0000000000001804] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 04/11/2018] [Indexed: 12/11/2022]
Abstract
Background Fat grafting is commonly used when treating soft-tissue defects. However, much of the basic biology behind fat transfer is still uncovered. Adipocytes can be divided into energy storing white and energy burning brown adipose cells. It is now well known, that also adult humans have metabolically active brown adipose tissue (BAT) within white adipose tissue (WAT). Previously our group showed that transfer of metabolically inactive WAT into a new environment increased the metabolic activity of the fat grafts to resemble the activity in the recipient site and that different WAT depots have variation in the metabolic activity. This led us to speculate, whether the metabolic increase of the graft is a result of "browning" of the transferred WAT toward beige adipose tissue. Methods We investigated the metabolic and histological characteristics and BAT marker Ucp1 gene expression in different types of WAT grafts placed either in subcutaneous or muscle tissue in mice. Metabolic activity of the grafts was investigated by FDG-PET/CT at 4- and 12-week time-points. Results The glucose uptake of all transferred fat types was increased when compared with respective control WAT regardless of transfer location. Ucp1 gene and protein expression was increased in 4 of 15 intramuscularly placed fat graft samples and showed histological resemblance to BAT with multilocular cells. Conclusions Grafting of metabolically inactive fat intramuscularly may induce browning of fat grafts toward more active beige adipose tissue. This opens up new research areas in exploiting fat grafting in metabolic diseases.
Collapse
|
40
|
A direct tissue-grafting approach to increasing endogenous brown fat. Sci Rep 2018; 8:7957. [PMID: 29785004 PMCID: PMC5962549 DOI: 10.1038/s41598-018-25866-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 04/24/2018] [Indexed: 12/20/2022] Open
Abstract
There is widespread evidence that increasing functional mass of brown adipose tissue (BAT) via browning of white adipose tissue (WAT) could potentially counter obesity and diabetes. However, most current approaches focus on administration of pharmacological compounds which expose patients to highly undesirable side effects. Here, we describe a simple and direct tissue-grafting approach to increase BAT mass through ex vivo browning of subcutaneous WAT, followed by re-implantation into the host; this cell-therapy approach could potentially act synergistically with existing pharmacological approaches. With this process, entitled "exBAT", we identified conditions, in both mouse and human tissue, that convert whole fragments of WAT to BAT via a single step and without unwanted off-target pharmacological effects. We show that ex vivo, exBAT exhibited UCP1 immunostaining, lipid droplet formation, and mitochondrial metabolic activity consistent with native BAT. In mice, exBAT exhibited a highly durable phenotype for at least 8 weeks. Overall, these results enable a simple and scalable tissue-grafting strategy, rather than pharmacological approaches, for increasing endogenous BAT and studying its effect on host weight and metabolism.
Collapse
|
41
|
Chen L, Wang L, Li Y, Wuang L, Liu Y, Pang N, Luo Y, He J, Zhang L, Chen N, Li R, Wu J. Transplantation of Normal Adipose Tissue Improves Blood Flow and Reduces Inflammation in High Fat Fed Mice With Hindlimb Ischemia. Front Physiol 2018; 9:197. [PMID: 29568274 PMCID: PMC5852102 DOI: 10.3389/fphys.2018.00197] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Accepted: 02/23/2018] [Indexed: 01/18/2023] Open
Abstract
Background: Fat deposition is associated with peripheral arterial disease. Adipose tissue has recently been implicated in vascular remodeling and angiogenic activity. We hypothesized that the transplantation of adipose tissues from normal mice improves blood flow perfusion and neovascularization in high-fat diet fed mice. Methods: After 14 weeks of high-fat diet (HFD)-fed mice, unilateral hind limb ischemia was performed. Subcutaneous white adipose tissue (WAT) and brown adipose tissue (BAT) fat pads were harvested from normal EGFP mice, and subcutaneously transplanted over the region of the adductor muscles of HFD mice. Blood flow was measured using Laser Doppler Scanner. Vascular density, macrophages infiltration, and macrophage polarization were examined by RT-qPCR, and immunohistochemistry. Results: We found that the transplantation of WAT derived from normal mice improved functional blood flow in HFD-fed mice compared to mice transplanted with BAT and sham-treated mice. WAT transplantation increased the recruitment of pericytes associated with nascent blood vessels, but did not affect capillary formation. Furthermore, transplantation of WAT ameliorated HFD-induced insulin resistance, M2 macrophage predominance and the release of arteriogenic factors in ischemic muscles. Mice receiving WAT also displayed a marked reduction in several proinflammatory cytokines. In contrast, mice transplanted with BAT were glucose intolerant and demonstrated increased IL-6 levels in ischemic muscles. Conclusion: These results indicate that transplantation of adipose tissue elicits improvements in blood perfusion and beneficial effects on systemic glucose homeostasis and could be a promising therapeutic option for the treatment of diabetic peripheral arterial disease.
Collapse
Affiliation(s)
- Liyuan Chen
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Lin Wang
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Yongjie Li
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Liqun Wuang
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Yaofang Liu
- Department of Gynaecology and Obstetrics, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Ningbo Pang
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Yulin Luo
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Jing He
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Liping Zhang
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Ni Chen
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Rong Li
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Jianbo Wu
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China.,Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO, United States
| |
Collapse
|
42
|
Schoettl T, Fischer IP, Ussar S. Heterogeneity of adipose tissue in development and metabolic function. ACTA ACUST UNITED AC 2018. [PMID: 29514879 DOI: 10.1242/jeb.162958] [Citation(s) in RCA: 122] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Adipose tissue is a central metabolic organ. Unlike other organs, adipose tissue is compartmentalized into individual depots and distributed throughout the body. These different adipose depots show major functional differences and risk associations for developing metabolic syndrome. Recent advances in lineage tracing demonstrate that individual adipose depots are composed of adipocytes that are derived from distinct precursor populations, giving rise to different populations of energy-storing white adipocytes. Moreover, distinct lineages of energy-dissipating brown and beige adipocytes exist in discrete depots or within white adipose tissue depots. In this Review, we discuss developmental and functional heterogeneity, as well as sexual dimorphism, between and within individual adipose tissue depots. We highlight current data relating to the differences between subcutaneous and visceral white adipose tissue in the development of metabolic dysfunction, with special emphasis on adipose tissue expansion and remodeling of the extracellular matrix. Moreover, we provide a detailed overview of adipose tissue development as well as the consensus and controversies relating to adult adipocyte precursor populations.
Collapse
Affiliation(s)
- Theresa Schoettl
- JRG Adipocytes and Metabolism, Institute for Diabetes and Obesity, Helmholtz Diabetes Center at Helmholtz Center Munich, 85748 Garching, Germany.,German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
| | - Ingrid P Fischer
- JRG Adipocytes and Metabolism, Institute for Diabetes and Obesity, Helmholtz Diabetes Center at Helmholtz Center Munich, 85748 Garching, Germany.,German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany.,Division of Metabolic Diseases, Department of Medicine, Technische Universität München, 80333 Munich, Germany
| | - Siegfried Ussar
- JRG Adipocytes and Metabolism, Institute for Diabetes and Obesity, Helmholtz Diabetes Center at Helmholtz Center Munich, 85748 Garching, Germany .,German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
| |
Collapse
|
43
|
Torres-Villalobos G, Hamdan-Pérez N, Díaz-Villaseñor A, Tovar AR, Torre-Villalvazo I, Ordaz-Nava G, Morán-Ramos S, Noriega LG, Martínez-Benítez B, López-Garibay A, Torres-Landa S, Ceballos-Cantú JC, Tovar-Palacio C, Figueroa-Juárez E, Hiriart M, Medina-Santillán R, Castillo-Hernández C, Torres N. Autologous subcutaneous adipose tissue transplants improve adipose tissue metabolism and reduce insulin resistance and fatty liver in diet-induced obesity rats. Physiol Rep 2017; 4:4/17/e12909. [PMID: 27582062 PMCID: PMC5027344 DOI: 10.14814/phy2.12909] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 08/01/2016] [Indexed: 02/07/2023] Open
Abstract
Long‐term dietary and pharmacological treatments for obesity have been questioned, particularly in individuals with severe obesity, so a new approach may involve adipose tissue transplants, particularly autologous transplants. Thus, the aim of this study was to evaluate the metabolic effects of autologous subcutaneous adipose tissue (SAT) transplants into two specific intraabdominal cavity sites (omental and retroperitoneal) after 90 days. The study was performed using two different diet‐induced obesity (DIO) rat models: one using a high‐fat diet (HFD) and the other using a high‐carbohydrate diet (HCHD). Autologous SAT transplant reduced hypertrophic adipocytes, improved insulin sensitivity, reduced hepatic lipid content, and fasting serum‐free fatty acids (FFAs) concentrations in the two DIO models. In addition, the reductions in FFAs and glycerol were accompanied by a greater reduction in lipolysis, assessed via the phosphorylation status of HSL, in the transplanted adipose tissue localized in the omentum compared with that localized in the retroperitoneal compartment. Therefore, the improvement in hepatic lipid content after autologous SAT transplant may be partially attributed to a reduction in lipolysis in the transplanted adipose tissue in the omentum due to the direct drainage of FFAs into the liver. The HCHD resulted in elevated fasting and postprandial serum insulin levels, which were dramatically reduced by the autologous SAT transplant. In conclusion, the specific intraabdominal localization of the autologous SAT transplant improved the carbohydrate and lipid metabolism of adipose tissue in obese rats and selectively corrected the metabolic parameters that are dependent on the type of diet used to generate the DIO model.
Collapse
Affiliation(s)
- Gonzalo Torres-Villalobos
- Depto. de Cirugía, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Tlalpan, Mexico City, Mexico Depto. de Cirugía Experimental, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Tlalpan, Mexico City, Mexico
| | - Nashla Hamdan-Pérez
- Depto. de Cirugía Experimental, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Tlalpan, Mexico City, Mexico
| | - Andrea Díaz-Villaseñor
- Depto. de Fisiología de la Nutrición, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Tlalpan, Mexico City, Mexico Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Armando R Tovar
- Depto. de Fisiología de la Nutrición, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Tlalpan, Mexico City, Mexico
| | - Ivan Torre-Villalvazo
- Depto. de Fisiología de la Nutrición, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Tlalpan, Mexico City, Mexico
| | - Guillermo Ordaz-Nava
- Depto. de Fisiología de la Nutrición, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Tlalpan, Mexico City, Mexico
| | - Sofía Morán-Ramos
- Depto. de Fisiología de la Nutrición, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Tlalpan, Mexico City, Mexico
| | - Lilia G Noriega
- Depto. de Fisiología de la Nutrición, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Tlalpan, Mexico City, Mexico
| | - Braulio Martínez-Benítez
- Depto. de Patología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Tlalpan, Mexico City, Mexico
| | - Alejandro López-Garibay
- Depto. de Cirugía Experimental, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Tlalpan, Mexico City, Mexico
| | - Samuel Torres-Landa
- Depto. de Cirugía Experimental, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Tlalpan, Mexico City, Mexico
| | - Juan C Ceballos-Cantú
- Depto. de Cirugía Experimental, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Tlalpan, Mexico City, Mexico
| | - Claudia Tovar-Palacio
- Depto. de Nefrología y Metabolismo Mineral, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Tlalpan, Mexico City, Mexico
| | - Elizabeth Figueroa-Juárez
- Depto. de Nefrología y Metabolismo Mineral, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Tlalpan, Mexico City, Mexico
| | - Marcia Hiriart
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Roberto Medina-Santillán
- Departamento de Posgrado e Investigación, Instituto Politécnico Nacional, Escuela Superior de Medicina, Mexico City, Mexico
| | - Carmen Castillo-Hernández
- Departamento de Posgrado e Investigación, Instituto Politécnico Nacional, Escuela Superior de Medicina, Mexico City, Mexico
| | - Nimbe Torres
- Depto. de Fisiología de la Nutrición, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Tlalpan, Mexico City, Mexico
| |
Collapse
|
44
|
Soares AF, Paz-Montoya J, Lei H, Moniatte M, Gruetter R. Sexual dimorphism in hepatic lipids is associated with the evolution of metabolic status in mice. NMR IN BIOMEDICINE 2017; 30:e3761. [PMID: 28661066 DOI: 10.1002/nbm.3761] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 05/16/2017] [Accepted: 05/16/2017] [Indexed: 05/28/2023]
Abstract
Ectopic lipid accumulation in the liver is implicated in metabolic disease in an age- and sex-dependent manner. The role of hepatic lipids has been well established within the scope of metabolic insults in mice, but has been insufficiently characterized under standard housing conditions, where age-related metabolic alterations are known to occur. We studied a total of 10 male and 10 female mice longitudinally. At 3, 7 and 11 months of age, non-invasive 1 H-magnetic resonance spectroscopy (1 H-MRS) was used to monitor hepatic lipid content (HLC) and fatty acid composition in vivo, and glucose homeostasis was assessed with glucose and insulin challenges. At the end of the study, hepatic lipids were comprehensively characterized by nuclear magnetic resonance (NMR) and liquid chromatography-mass spectrometric analyses of liver tissue samples. In males, HLC increased from 1.4 ± 0.1% at 3 months to 2.9 ± 0.3% at 7 months (p < 0.01) and 2.7 ± 0.3% at 11 months (p < 0.05), in correlation with fasting insulin levels (p < 0.01, r = 0.51) and parameters from the insulin tolerance test (ITT; p < 0.001, r = -0.69 versus area under the curve; p < 0.01, r = -0.57 versus blood glucose drop at 1 h post-ITT; p < 0.01, r = 0.55 versus blood glucose at 3 h post-ITT). The metabolic performance of females remained the same throughout the study, and HLC was higher than that of males at 3 months (2.7 ± 0.2%, p < 0.01), but comparable at 7 months (2.2 ± 0.2%) and 11 months (2.2 ± 0.1%). Strong sexual dimorphism in bioactive lipid species, including diacylglycerols (higher in males, p < 0.0001), phosphatidylinositols (higher in females, p < 0.001) and omega-3 polyunsaturated fatty acids (higher in females, p < 0.01), was found to be in good correlation with metabolic scores at 11 months. Therefore, in mice housed under standard conditions, sex-specific composition of bioactive lipids is associated with metabolic protection in females, whose metabolic performance was independent of hepatic cytosolic lipid content.
Collapse
Affiliation(s)
- Ana Francisca Soares
- École Polytechnique Fédérale de Lausanne, Laboratory for Functional and Metabolic Imaging (LIFMET), Lausanne, VD, Switzerland
| | - Jonathan Paz-Montoya
- École Polytechnique Fédérale de Lausanne, Proteomics Core Facility (PCF), Lausanne, VD, Switzerland
| | - Hongxia Lei
- Center for Biomedical Imaging (CIBM), Lausanne VD, Switzerland and University of Geneva, Department of Radiology, Geneva, Switzerland
| | - Marc Moniatte
- École Polytechnique Fédérale de Lausanne, Proteomics Core Facility (PCF), Lausanne, VD, Switzerland
| | - Rolf Gruetter
- École Polytechnique Fédérale de Lausanne, Laboratory for Functional and Metabolic Imaging (LIFMET), Lausanne, VD, Switzerland
- Center for Biomedical Imaging (CIBM), Lausanne VD, Switzerland and University of Geneva, Department of Radiology, Geneva, Switzerland
| |
Collapse
|
45
|
Adipose Tissue Function and Expandability as Determinants of Lipotoxicity and the Metabolic Syndrome. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 960:161-196. [PMID: 28585199 DOI: 10.1007/978-3-319-48382-5_7] [Citation(s) in RCA: 117] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The adipose tissue organ is organised as distinct anatomical depots located all along the body axis and it is constituted of three different types of adipocytes : white, beige and brown which are integrated with vascular, immune, neural and extracellular stroma cells. These distinct adipocytes serve different specialised functions. The main function of white adipocytes is to ensure healthy storage of excess nutrients/energy and its rapid mobilisation to supply the demand of energy imposed by physiological cues in other organs, whereas brown and beige adipocytes are designed for heat production through uncoupling lipid oxidation from energy production. The concert action of the three type of adipocytes/tissues has been reported to ensure an optimal metabolic status in rodents. However, when one or multiple of these adipose depots become dysfunctional as a consequence of sustained lipid/nutrient overload, then insulin resistance and associated metabolic complications ensue. These metabolic alterations negatively affects the adipose tissue functionality and compromises global metabolic homeostasis. Optimising white adipose tissue expandability and its functional metabolic flexibility and/or promoting brown/beige mediated thermogenic activity counteracts obesity and its associated lipotoxic metabolic effects. The development of these therapeutic approaches requires a deep understanding of adipose tissue in all broad aspects. In this chapter we will discuss the characteristics of the different adipose tissue depots with respect to origins and precursors recruitment, plasticity, cellular composition and expandability capacity as well as molecular and metabolic signatures in both physiological and pathophysiological conditions.
Collapse
|
46
|
Delgado C, Chertow GM, Kaysen GA, Dalrymple LS, Kornak J, Grimes B, Johansen KL. Associations of Body Mass Index and Body Fat With Markers of Inflammation and Nutrition Among Patients Receiving Hemodialysis. Am J Kidney Dis 2017; 70:817-825. [PMID: 28870376 DOI: 10.1053/j.ajkd.2017.06.028] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 06/27/2017] [Indexed: 11/11/2022]
Abstract
BACKGROUND Understanding the extent to which visceral and subcutaneous body fat are associated with markers of nutrition and inflammation in patients on dialysis therapy could shed light on the obesity paradox and the biology of subcutaneous fat. STUDY DESIGN Cross-sectional. SETTING & PARTICIPANTS 609 adults receiving hemodialysis who participated in the ACTIVE/ADIPOSE Study. PREDICTORS Body mass index (BMI), waist circumference, and bioelectrical impedance spectroscopy-derived estimates of percent body fat. OUTCOMES C-Reactive protein (CRP), interleukin 6 (IL-6), prealbumin, albumin, leptin, and adiponectin concentrations. MEASUREMENTS We performed linear regression analyses to examine the extent to which proxies of visceral and subcutaneous fat were associated with inflammation, nutrition, and adiposity-related hormones. RESULTS BMI was directly associated with markers of inflammation (standardized estimate for ln[CRP in mg/L]: 0.30 [95% CI, 0.22-0.38] per 10kg/m2; for ln[IL-6 in pg/mL]: 0.10 [95% CI, 0.02-0.18] per 10kg/m2), but was not associated with markers of nutrition. BMI was also inversely associated with adiponectin and directly associated with leptin. With waist circumference and percent body fat (as a proxy of visceral and subcutaneous fat, respectively) modeled together, waist circumference was associated with markers of inflammation (standardized estimate for ln[CRP in mg/L]: 0.21 [95% CI, 0.09-0.34] per 10cm; for ln[IL-6 in pg/mL]: 0.18 [95% CI, 0.07-0.29] per 10cm), whereas percent body fat was not associated with CRP (standardized estimate for ln[CRP in mg/L]: 0.03 [95% CI, -0.10 to 0.15] per 1%) and was inversely associated with IL-6 (standardized estimate for ln[IL-6 in pg/mL]: -0.15 [95% CI, -0.27 to -0.02] per 1%). In addition, waist circumference was inversely associated with prealbumin and albumin (standardized estimates of -0.12 [95% CI, -0.23 to -0.02] mg/dL per 10cm and -0.17 [95% CI, -0.28 to -0.06] g/dL per 10cm, respectively), and percent body fat was directly associated with prealbumin and albumin (0.20 [95% CI, 0.07-0.32] mg/dL and 0.15 [95% CI, 0.02-0.28] g/dL per 1%, respectively). Higher waist circumference was associated indirectly with adiponectin and directly with leptin concentrations. LIMITATIONS Although the observed associations implicate visceral fat as the cause of inflammation, it cannot be determined in this cross-sectional study. CONCLUSIONS Proxies of visceral and subcutaneous fat appear to have opposing associations with biomarkers of inflammation and nutrition. Subcutaneous fat may be an indicator of nutritional status, and visceral fat, an indicator of inflammation.
Collapse
Affiliation(s)
- Cynthia Delgado
- Division of Nephrology, University of California, San Francisco, CA; Nephrology Section, San Francisco VA Medical Center, San Francisco, CA.
| | - Glenn M Chertow
- Division of Nephrology, Stanford University School of Medicine, Stanford, CA; US Renal Data System Nutrition Special Studies Center, Ann Arbor, MI
| | - George A Kaysen
- US Renal Data System Nutrition Special Studies Center, Ann Arbor, MI; Department of Medicine, Division of Nephrology, University of California, Davis, CA; Department of Biochemistry and Molecular Medicine, University of California, Davis, CA
| | | | - John Kornak
- US Renal Data System Nutrition Special Studies Center, Ann Arbor, MI; Department of Epidemiology and Biostatistics, University of California, San Francisco, CA
| | - Barbara Grimes
- US Renal Data System Nutrition Special Studies Center, Ann Arbor, MI; Department of Epidemiology and Biostatistics, University of California, San Francisco, CA
| | - Kirsten L Johansen
- Division of Nephrology, University of California, San Francisco, CA; Nephrology Section, San Francisco VA Medical Center, San Francisco, CA; US Renal Data System Nutrition Special Studies Center, Ann Arbor, MI
| |
Collapse
|
47
|
Gaborit B, Sengenes C, Ancel P, Jacquier A, Dutour A. Role of Epicardial Adipose Tissue in Health and Disease: A Matter of Fat? Compr Physiol 2017. [PMID: 28640452 DOI: 10.1002/cphy.c160034] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Epicardial adipose tissue (EAT) is a small but very biologically active ectopic fat depot that surrounds the heart. Given its rapid metabolism, thermogenic capacity, unique transcriptome, secretory profile, and simply measurability, epicardial fat has drawn increasing attention among researchers attempting to elucidate its putative role in health and cardiovascular diseases. The cellular crosstalk between epicardial adipocytes and cells of the vascular wall or myocytes is high and suggests a local role for this tissue. The balance between protective and proinflammatory/profibrotic cytokines, chemokines, and adipokines released by EAT seem to be a key element in atherogenesis and could represent a future therapeutic target. EAT amount has been found to predict clinical coronary outcomes. EAT can also modulate cardiac structure and function. Its amount has been associated with atrial fibrillation, coronary artery disease, and sleep apnea syndrome. Conversely, a beiging fat profile of EAT has been identified. In this review, we describe the current state of knowledge regarding the anatomy, physiology and pathophysiological role of EAT, and the factors more globally leading to ectopic fat development. We will also highlight the most recent findings on the origin of this ectopic tissue, and its association with cardiac diseases. © 2017 American Physiological Society. Compr Physiol 7:1051-1082, 2017.
Collapse
Affiliation(s)
- Bénédicte Gaborit
- NORT, Aix Marseille Univ, INSERM, INRA, NORT, Marseille, France.,Endocrinology Metabolic Diseases, and Nutrition Department, Pole ENDO, APHM, Aix-Marseille Univ, Marseille, France
| | - Coralie Sengenes
- STROMALab, Université de Toulouse, EFS, ENVT, Inserm U1031, ERL CNRS 5311, CHU Rangueil, Toulouse, France
| | - Patricia Ancel
- NORT, Aix Marseille Univ, INSERM, INRA, NORT, Marseille, France
| | - Alexis Jacquier
- CNRS UMR 7339, Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Marseille, France.,Radiology department, CHU La Timone, Marseille, France
| | - Anne Dutour
- NORT, Aix Marseille Univ, INSERM, INRA, NORT, Marseille, France.,Endocrinology Metabolic Diseases, and Nutrition Department, Pole ENDO, APHM, Aix-Marseille Univ, Marseille, France
| |
Collapse
|
48
|
Graus-Nunes F, Rachid TL, de Oliveira Santos F, Barbosa-da-Silva S, Souza-Mello V. AT1 receptor antagonist induces thermogenic beige adipocytes in the inguinal white adipose tissue of obese mice. Endocrine 2017; 55:786-798. [PMID: 28012150 DOI: 10.1007/s12020-016-1213-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 12/15/2016] [Indexed: 01/06/2023]
Abstract
PURPOSE To evaluate whether losartan is able to induce beige adipocytes formation, focusing on the thermogenic gene expression and adipocyte remodeling in the subcutaneous white adipose tissue of diet-induced obese mice. METHODS Male C57BL/6 mice received a control diet (10% energy as lipids) or a high-fat diet (50% energy as lipids) for 10 weeks, followed by a 5-week treatment with losartan: control group, control-losartan group (10 mg/Kg/day), high-fat group and high-fat-losartan group (10 mg/Kg/day). Biochemical, morphometrical, stereological and molecular approaches were used to evaluate the outcomes. RESULTS The high-fat diet elicited overweight, insulin resistance and adipocyte hypertrophy in the high-fat group, all of which losartan rescued in the high-fat-losartan group. These effects comply with the induction of beige adipocytes within the inguinal fat pads in high-fat-losartan group as they exhibited the greatest energy expenditure among the groups along with the presence uncoupling protein 1 positive multilocular adipocytes with enhanced peroxisome proliferator-activated receptor gamma coactivator 1-alpha and PR domain containing 16 mRNA levels, indicating a significant potential for mitochondrial biogenesis and adaptive thermogenesis. CONCLUSIONS Our results show compelling evidence that losartan countered diet-induced obesity in mice by enhancing energy expenditure through beige adipocytes induction. Reduced body mass, increased insulin sensitivity, decreased adipocyte size and marked expression of uncoupling protein 1 by ectopic multilocular adipocytes support these findings. The use of losartan as a coadjutant medicine to tackle obesity and its related disorders merits further investigation.
Collapse
Affiliation(s)
- Francielle Graus-Nunes
- Laboratory of Morphometry, Metabolism and Cardiovascular disease, Biomedical Centre, Institute of Biology, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Tamiris Lima Rachid
- Laboratory of Morphometry, Metabolism and Cardiovascular disease, Biomedical Centre, Institute of Biology, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Felipe de Oliveira Santos
- Laboratory of Morphometry, Metabolism and Cardiovascular disease, Biomedical Centre, Institute of Biology, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Sandra Barbosa-da-Silva
- Laboratory of Morphometry, Metabolism and Cardiovascular disease, Biomedical Centre, Institute of Biology, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Vanessa Souza-Mello
- Laboratory of Morphometry, Metabolism and Cardiovascular disease, Biomedical Centre, Institute of Biology, State University of Rio de Janeiro, Rio de Janeiro, Brazil.
| |
Collapse
|
49
|
Bargut TCL, Souza-Mello V, Mandarim-de-Lacerda CA, Aguila MB. Fish oil diet modulates epididymal and inguinal adipocyte metabolism in mice. Food Funct 2016; 7:1468-76. [PMID: 26876019 DOI: 10.1039/c5fo00909j] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We aimed to investigate the impact of different high-fat diets containing fish oil on adiposity and white adipose tissue (WAT) function in mice, comparing the effects on epididymal (eWAT) and subcutaneous (sWAT) depots. For this, we used C57BL/6 male mice fed four types of diets for eight weeks: standard chow (SC), high-fat lard (HF-L), high-fat lard plus fish oil (HF-L + FO), and high-fat fish oil (HF-FO). The HF-L group had a greater body mass (BM) gain, insulin resistance, increased gene expression related to lipogenesis (CD36, aP2, SREBP1c, and FAS), decreased gene expression of perilipin in both eWAT and sWAT, and reduced expression of genes related to beta-oxidation (CPT-1a) and to mitochondrial biogenesis (PGC1alpha, NRF1, and TFAM) in eWAT and sWAT. On the other hand, the HF-L + FO and HF-FO groups showed a smaller BM gain and adiposity, and normalization of insulin resistance and lipogenic genes in both eWAT and sWAT. These animals also showed decreased perilipin gene expression and elevated expression of beta-oxidation and mitochondrial biogenesis genes in eWAT and sWAT. 'Beige' adipocytes were identified in sWAT of the HF-FO animals. In conclusion, fish oil intake has anti-obesity effects through modulation of both eWAT and sWAT metabolism in mice and is relevant in diminishing the BM gain, adiposity, and insulin resistance even in combination with a high-fat lard diet in mice.
Collapse
Affiliation(s)
- Thereza Cristina Lonzetti Bargut
- Laboratory of Morphometry, Metabolism, and Cardiovascular Disease, Biomedical Center, Institute of Biology, State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
| | - Vanessa Souza-Mello
- Laboratory of Morphometry, Metabolism, and Cardiovascular Disease, Biomedical Center, Institute of Biology, State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
| | - Carlos Alberto Mandarim-de-Lacerda
- Laboratory of Morphometry, Metabolism, and Cardiovascular Disease, Biomedical Center, Institute of Biology, State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
| | - Marcia Barbosa Aguila
- Laboratory of Morphometry, Metabolism, and Cardiovascular Disease, Biomedical Center, Institute of Biology, State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
| |
Collapse
|
50
|
Transgenic Adipose-specific Expression of the Nuclear Receptor RORα Drives a Striking Shift in Fat Distribution and Impairs Glycemic Control. EBioMedicine 2016; 11:101-117. [PMID: 27568222 PMCID: PMC5049998 DOI: 10.1016/j.ebiom.2016.08.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 08/17/2016] [Accepted: 08/17/2016] [Indexed: 12/17/2022] Open
Abstract
RORα is a member of the nuclear receptor (NR) superfamily and analysis of the (global) RORα-deficient mouse model revealed this NR has a role in glycemic control and fat deposition. Therefore, we generated an adipose-specific RORα ‘gain of function’ mouse model under the control of the fatty acid binding protein 4 (FABP4) promoter to elucidate the function of RORα in adipose tissue. The Tg-FABP4-RORα4 mice demonstrated a shift in fat distribution to non-adipose tissues when challenged with a high fat diet (HFD). Specifically, we observed a subcutaneous lipodystrophy, accompanied by hepatomegaly (fatty liver/mild portal fibrosis) and splenomegaly; in a background of decreased weight gain and total body fat after HFD. Moreover, we observed significantly higher fasting blood glucose and impaired clearance of glucose in Tg-FABP4-RORα4 mice. Genome wide expression and qPCR profiling analysis identified: (i) subcutaneous adipose specific decreases in the expression of genes involved in fatty acid biosynthesis, lipid droplet expansion and glycemic control, and (ii) the fibrosis pathway as the most significant pathway [including dysregulation of the collagen/extracellular matrix (ECM) pathways] in subcutaneous adipose and liver. The pathology presented in the Tg-FABP4-RORα4 mice is reminiscent of human metabolic disease (associated with aberrant ECM expression) highlighting the therapeutic potential of this NR. Adipose-specific expression of RORα is associated with subcutaneous lipodystrophy and hepatomegaly with fibrosis. The phenotype is associated with impaired glycemic control and decreased weight gain on a high fat diet. Gene expression profiling reveals significant dysregulation of extra cellular matrix signaling.
We have generated a ‘gain of function’ animal model with the nuclear hormone receptor RORα4 to understand the function of this protein in fat. Over expression of the RORα4 gene, was associated with fat deposition in non-adipose tissues on a high fat diet. Moreover, we observed a decrease in fat tissue (located under the skin) accompanied by enlargement of the liver and spleen. In addition, over expression of this receptor was associated with impaired glycemic control. The pathology in this animal model is reminiscent of metabolic disease in humans, highlighting the therapeutic potential of pharmacologically manipulating this nuclear receptor.
Collapse
|