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Bavaresco A, Mazzeo P, Lazzara M, Barbot M. Adipose tissue in cortisol excess: What Cushing's syndrome can teach us? Biochem Pharmacol 2024; 223:116137. [PMID: 38494065 DOI: 10.1016/j.bcp.2024.116137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 03/14/2024] [Accepted: 03/14/2024] [Indexed: 03/19/2024]
Abstract
Endogenous Cushing's syndrome (CS) is a rare condition due to prolonged exposure to elevated circulating cortisol levels that features its typical phenotype characterised by moon face, proximal myopathy, easy bruising, hirsutism in females and a centripetal distribution of body fat. Given the direct and indirect effects of hypercortisolism, CS is a severe disease burdened by increased cardio-metabolic morbidity and mortality in which visceral adiposity plays a leading role. Although not commonly found in clinical setting, endogenous CS is definitely underestimated leading to delayed diagnosis with consequent increased rate of complications and reduced likelihood of their reversal after disease control. Most of all, CS is a unique model for systemic impairment induced by exogenous glucocorticoid therapy that is commonly prescribed for a number of chronic conditions in a relevant proportion of the worldwide population. In this review we aim to summarise on one side, the mechanisms behind visceral adiposity and lipid metabolism impairment in CS during active disease and after remission and on the other explore the potential role of cortisol in promoting adipose tissue accumulation.
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Affiliation(s)
- Alessandro Bavaresco
- Department of Medicine DIMED, University of Padua, Padua, Italy; Endocrinology Unit, Department of Medicine DIMED, University-Hospital of Padua, Padua, Italy
| | - Pierluigi Mazzeo
- Department of Medicine DIMED, University of Padua, Padua, Italy; Endocrinology Unit, Department of Medicine DIMED, University-Hospital of Padua, Padua, Italy
| | - Martina Lazzara
- Department of Medicine DIMED, University of Padua, Padua, Italy; Endocrinology Unit, Department of Medicine DIMED, University-Hospital of Padua, Padua, Italy
| | - Mattia Barbot
- Department of Medicine DIMED, University of Padua, Padua, Italy; Endocrinology Unit, Department of Medicine DIMED, University-Hospital of Padua, Padua, Italy.
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2
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Lee MJ, Kim J. The pathophysiology of visceral adipose tissues in cardiometabolic diseases. Biochem Pharmacol 2024; 222:116116. [PMID: 38460909 DOI: 10.1016/j.bcp.2024.116116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 02/21/2024] [Accepted: 03/06/2024] [Indexed: 03/11/2024]
Abstract
Central pattern of fat distribution, especially fat accumulation within the intraabdominal cavity increases risks for cardiometabolic diseases. Portal hypothesis combined with a pathological remodeling in visceral fat is considered the major etiological factor explaining the independent contribution of visceral obesity to cardiometabolic diseases. Excessive remodeling in visceral fat during development of obesity leads to dysfunctions in the depot, characterized by hypertrophy and death of adipocytes, hypoxia, inflammation, and fibrosis. Dysfunctional visceral fat secretes elevated levels of fatty acids, glycerol, and proinflammatory and profibrotic cytokines into the portal vein directly impacting the liver, the central regulator of systemic metabolism. These metabolic and endocrine products induce ectopic fat accumulation, insulin resistance, inflammation, and fibrosis in the liver, which in turn causes or exacerbates systemic metabolic derangements. Elucidation of underlying mechanisms that lead to the pathological remodeling and higher degree of dysfunctions in visceral adipose tissue is therefore, critical for the development of therapeutics to prevent deleterious sequelae in obesity. We review depot differences in metabolic and endocrine properties and expendabilities as well as underlying mechanisms that contribute to the pathophysiological aspects of visceral adiposity in cardiometabolic diseases. We also discuss impacts of different weight loss interventions on visceral adiposity and cardiometabolic diseases.
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Affiliation(s)
- Mi-Jeong Lee
- Department of Human Nutrition, Food and Animal Sciences, University of Hawaii at Manoa, Hawaii 96822, USA.
| | - Jeehoon Kim
- Department of Sociology, Social Work, and Criminology, Idaho State University, Idaho 83209, USA
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3
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Griffin JD, Buxton JM, Culver JA, Barnes R, Jordan EA, White AR, Flaherty SE, Bernardo B, Ross T, Bence KK, Birnbaum MJ. Hepatic Activin E mediates liver-adipose inter-organ communication, suppressing adipose lipolysis in response to elevated serum fatty acids. Mol Metab 2023; 78:101830. [PMID: 38787338 PMCID: PMC10656223 DOI: 10.1016/j.molmet.2023.101830] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 10/21/2023] [Indexed: 05/25/2024] Open
Abstract
OBJECTIVE The liver is a central regulator of energy metabolism exerting its influence both through intrinsic processing of substrates such as glucose and fatty acid as well as by secreting endocrine factors, known as hepatokines, which influence metabolism in peripheral tissues. Human genome wide association studies indicate that a predicted loss-of-function variant in the Inhibin βE gene (INHBE), encoding the putative hepatokine Activin E, is associated with reduced abdominal fat mass and cardiometabolic disease risk. However, the regulation of hepatic Activin E and the influence of Activin E on adiposity and metabolic disease are not well understood. Here, we examine the relationship between hepatic Activin E and adipose metabolism, testing the hypothesis that Activin E functions as part of a liver-adipose, inter-organ feedback loop to suppress adipose tissue lipolysis in response to elevated serum fatty acids and hepatic fatty acid exposure. METHODS The relationship between hepatic Activin E and non-esterified fatty acids (NEFA) released from adipose lipolysis was assessed in vivo using fasted CL 316,243 treated mice and in vitro using Huh7 hepatocytes treated with fatty acids. The influence of Activin E on adipose lipolysis was examined using a combination of Inhbe knockout mice, a mouse model of hepatocyte-specific overexpression of Activin E, and mouse brown adipocytes treated with Activin E enriched media. RESULTS Increasing hepatocyte NEFA exposure in vivo by inducing adipose lipolysis through fasting or CL 316,243 treatment increased hepatic Inhbe expression. Similarly, incubation of Huh7 human hepatocytes with fatty acids increased expression of INHBE. Genetic ablation of Inhbe in mice increased fasting circulating NEFA and hepatic triglyceride accumulation. Treatment of mouse brown adipocytes with Activin E conditioned media and overexpression of Activin E in mice suppressed adipose lipolysis and reduced serum FFA levels, respectively. The suppressive effects of Activin E on lipolysis were lost in CRISPR-mediated ALK7 deficient cells and ALK7 kinase deficient mice. Disruption of the Activin E-ALK7 signaling axis in Inhbe KO mice reduced adiposity upon HFD feeding, but caused hepatic steatosis and insulin resistance. CONCLUSIONS Taken together, our data suggest that Activin E functions as part of a liver-adipose feedback loop, such that in response to increased serum free fatty acids and elevated hepatic triglyceride, Activin E is released from hepatocytes and signals in adipose through ALK7 to suppress lipolysis, thereby reducing free fatty acid efflux to the liver and preventing excessive hepatic lipid accumulation. We find that disrupting this Activin E-ALK7 inter-organ communication network by ablation of Inhbe in mice increases lipolysis and reduces adiposity, but results in elevated hepatic triglyceride and impaired insulin sensitivity. These results highlight the liver-adipose, Activin E-ALK7 signaling axis as a critical regulator of metabolic homeostasis.
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Affiliation(s)
- John D Griffin
- Internal Medicine Research Unit, Pfizer Inc.,1 Portland Street, Cambridge, MA 02139, USA.
| | - Joanne M Buxton
- Internal Medicine Research Unit, Pfizer Inc.,1 Portland Street, Cambridge, MA 02139, USA
| | - Jeffrey A Culver
- Internal Medicine Research Unit, Pfizer Inc.,1 Portland Street, Cambridge, MA 02139, USA
| | - Robert Barnes
- Internal Medicine Research Unit, Pfizer Inc.,1 Portland Street, Cambridge, MA 02139, USA
| | - Emily A Jordan
- Internal Medicine Research Unit, Pfizer Inc.,1 Portland Street, Cambridge, MA 02139, USA
| | - Alexis R White
- Internal Medicine Research Unit, Pfizer Inc.,1 Portland Street, Cambridge, MA 02139, USA
| | - Stephen E Flaherty
- Internal Medicine Research Unit, Pfizer Inc.,1 Portland Street, Cambridge, MA 02139, USA
| | - Barbara Bernardo
- Internal Medicine Research Unit, Pfizer Inc.,1 Portland Street, Cambridge, MA 02139, USA
| | - Trenton Ross
- Internal Medicine Research Unit, Pfizer Inc.,1 Portland Street, Cambridge, MA 02139, USA
| | - Kendra K Bence
- Internal Medicine Research Unit, Pfizer Inc.,1 Portland Street, Cambridge, MA 02139, USA
| | - Morris J Birnbaum
- Internal Medicine Research Unit, Pfizer Inc.,1 Portland Street, Cambridge, MA 02139, USA
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Li X, Ren Y, Chang K, Wu W, Griffiths HR, Lu S, Gao D. Adipose tissue macrophages as potential targets for obesity and metabolic diseases. Front Immunol 2023; 14:1153915. [PMID: 37153549 PMCID: PMC10154623 DOI: 10.3389/fimmu.2023.1153915] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 04/04/2023] [Indexed: 05/09/2023] Open
Abstract
Macrophage infiltration into adipose tissue is a key pathological factor inducing adipose tissue dysfunction and contributing to obesity-induced inflammation and metabolic disorders. In this review, we aim to present the most recent research on macrophage heterogeneity in adipose tissue, with a focus on the molecular targets applied to macrophages as potential therapeutics for metabolic diseases. We begin by discussing the recruitment of macrophages and their roles in adipose tissue. While resident adipose tissue macrophages display an anti-inflammatory phenotype and promote the development of metabolically favorable beige adipose tissue, an increase in pro-inflammatory macrophages in adipose tissue has negative effects on adipose tissue function, including inhibition of adipogenesis, promotion of inflammation, insulin resistance, and fibrosis. Then, we presented the identities of the newly discovered adipose tissue macrophage subtypes (e.g. metabolically activated macrophages, CD9+ macrophages, lipid-associated macrophages, DARC+ macrophages, and MFehi macrophages), the majority of which are located in crown-like structures within adipose tissue during obesity. Finally, we discussed macrophage-targeting strategies to ameliorate obesity-related inflammation and metabolic abnormalities, with a focus on transcriptional factors such as PPARγ, KLF4, NFATc3, and HoxA5, which promote macrophage anti-inflammatory M2 polarization, as well as TLR4/NF-κB-mediated inflammatory pathways that activate pro-inflammatory M1 macrophages. In addition, a number of intracellular metabolic pathways closely associated with glucose metabolism, oxidative stress, nutrient sensing, and circadian clock regulation were examined. Understanding the complexities of macrophage plasticity and functionality may open up new avenues for the development of macrophage-based treatments for obesity and other metabolic diseases.
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Affiliation(s)
- Xirong Li
- Institute of Molecular and Translational Medicine, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Yakun Ren
- Institute of Molecular and Translational Medicine, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Kewei Chang
- Institute of Molecular and Translational Medicine, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
- Key Laboratory of Environment and Genes Related to Diseases (Xi’an Jiaotong University), Ministry of Education, Xi’an, China
- Department of Human Anatomy, Histology and Embryology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Center, Xi’an, China
| | - Wenlong Wu
- Institute of Molecular and Translational Medicine, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Helen R. Griffiths
- Swansea University Medical School, Swansea University, Swansea, United Kingdom
| | - Shemin Lu
- Institute of Molecular and Translational Medicine, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
- Key Laboratory of Environment and Genes Related to Diseases (Xi’an Jiaotong University), Ministry of Education, Xi’an, China
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Dan Gao
- Institute of Molecular and Translational Medicine, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
- Key Laboratory of Environment and Genes Related to Diseases (Xi’an Jiaotong University), Ministry of Education, Xi’an, China
- Department of Human Anatomy, Histology and Embryology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Center, Xi’an, China
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Santillana N, Astudillo-Guerrero C, D’Espessailles A, Cruz G. White Adipose Tissue Dysfunction: Pathophysiology and Emergent Measurements. Nutrients 2023; 15:nu15071722. [PMID: 37049561 PMCID: PMC10096946 DOI: 10.3390/nu15071722] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/27/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023] Open
Abstract
White adipose tissue (AT) dysfunction plays an important role in the development of cardiometabolic alterations associated with obesity. AT dysfunction is characterized by the loss of the expansion capacity of the AT, an increment in adipocyte hypertrophy, and changes in the secretion profile of adipose cells, associated with accumulation of macrophages and inflammation. Since not all people with an excess of adiposity develop comorbidities, it is necessary to find simple tools that can evidence AT dysfunction and allow the detection of those people with the potential to develop metabolic alterations. This review focuses on the current pathophysiological mechanisms of white AT dysfunction and emerging measurements to assess its functionality.
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Affiliation(s)
- Natalia Santillana
- Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, Santiago 8380453, Chile
| | - Camila Astudillo-Guerrero
- Centro de Neurobiología y Fisiopatología Integrativa (CENFI), Instituto de Fisiología, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso 2360102, Chile
- Programa de Doctorado en Ciencias Mención Neurociencia, Universidad de Valparaíso, Valparaíso 2360102, Chile
| | - Amanda D’Espessailles
- Instituto de Ciencias de la Salud, Universidad de O’Higgins, Rancagua 2820000, Chile
| | - Gonzalo Cruz
- Centro de Neurobiología y Fisiopatología Integrativa (CENFI), Instituto de Fisiología, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso 2360102, Chile
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English J, Orofino J, Cederquist CT, Paul I, Li H, Auwerx J, Emili A, Belkina A, Cardamone D, Perissi V. GPS2-mediated regulation of the adipocyte secretome modulates adipose tissue remodeling at the onset of diet-induced obesity. Mol Metab 2023; 69:101682. [PMID: 36731652 PMCID: PMC9922684 DOI: 10.1016/j.molmet.2023.101682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Accepted: 01/22/2023] [Indexed: 02/01/2023] Open
Abstract
OBJECTIVE Dysfunctional, unhealthy expansion of white adipose tissue due to excess dietary intake is a process at the root of obesity and Type 2 Diabetes development. The objective of this study is to contribute to a better understanding of the underlying mechanism(s) regulating the early stages of adipose tissue expansion and adaptation to dietary stress due to an acute, high-fat diet (HFD) challenge, with a focus on the communication between adipocytes and other stromal cells. METHODS We profiled the early response to high-fat diet exposure in wildtype and adipocyte-specific GPS2-KO (GPS2-AKO) mice at the cellular, tissue and organismal level. A multi-pronged approach was employed to disentangle the complex cellular interactions dictating tissue remodeling, via single-cell RNA sequencing and FACS profiling of the stromal fraction, and semi-quantitative proteomics of the adipocyte-derived exosomal cargo after 5 weeks of HFD feeding. RESULTS Our results indicate that loss of GPS2 in mature adipocytes leads to impaired adaptation to the metabolic stress imposed by HFD feeding. GPS2-AKO mice are significantly more inflamed, insulin resistant, and obese, compared to the WT counterparts. At the cellular level, lack of GPS2 in adipocytes impacts upon other stromal populations, with both the eWAT and scWAT depots exhibiting changes in the immune and non-immune compartments that contribute to an increase in inflammatory and anti-adipogenic cell types. Our studies also revealed that adipocyte to stromal cell communication is facilitated by exosomes, and that transcriptional rewiring of the exosomal cargo is crucial for tissue remodeling. Loss of GPS2 results in increased expression of secreted factors promoting a TGFβ-driven fibrotic microenvironment favoring unhealthy tissue remodeling and expansion. CONCLUSIONS Adipocytes serve as an intercellular signaling hub, communicating with the stromal compartment via paracrine signaling. Our study highlights the importance of proper regulation of the 'secretome' released by energetically stressed adipocytes at the onset of obesity. Altered transcriptional regulation of factors secreted via adipocyte-derived exosomes (AdExos), in the absence of GPS2, contributes to the establishment of an anti-adipogenic, pro-fibrotic adipose tissue environment, and to hastened progression towards a metabolically dysfunctional phenotype.
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Affiliation(s)
- Justin English
- Department of Biochemistry, Boston University School of Medicine, Boston, MA, USA; Department of Pharmacology and Experimental Therapeutics, Boston University School of Medicine, Boston, MA, USA.
| | - Joseph Orofino
- Department of Biochemistry, Boston University School of Medicine, Boston, MA, USA.
| | - Carly T. Cederquist
- Department of Biochemistry, Boston University School of Medicine, Boston, MA, USA
| | - Indranil Paul
- Department of Biochemistry, Boston University School of Medicine, Boston, MA, USA; Center for Network Systems Biology, Boston University, Boston, MA, USA.
| | - Hao Li
- Laboratory of Integrative Systems Physiology, Interfaculty Institute of Bioengineering, Ecole Polytechnique Federale de Lausanne, Lausanne, Switzerland.
| | - Johan Auwerx
- Laboratory of Integrative Systems Physiology, Interfaculty Institute of Bioengineering, Ecole Polytechnique Federale de Lausanne, Lausanne, Switzerland.
| | - Andrew Emili
- Department of Biochemistry, Boston University School of Medicine, Boston, MA, USA; Center for Network Systems Biology, Boston University, Boston, MA, USA.
| | - Anna Belkina
- Flow Cytometry Core Facility, Boston University School of Medicine, Boston, MA, USA; Department of Pathology and Laboratory Medicine, Boston University School of Medicine, Boston, MA, USA.
| | - Dafne Cardamone
- Department of Biochemistry, Boston University School of Medicine, Boston, MA, USA.
| | - Valentina Perissi
- Department of Biochemistry, Boston University School of Medicine, Boston, MA, USA; School of Life Science, Northwestern Polytechnical University, Xi'an 710072, China.
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Corral A, Alcala M, Carmen Duran-Ruiz M, Arroba AI, Ponce-Gonzalez JG, Todorčević M, Serra D, Calderon-Dominguez M, Herrero L. Role of long non-coding RNAs in adipose tissue metabolism and associated pathologies. Biochem Pharmacol 2022; 206:115305. [DOI: 10.1016/j.bcp.2022.115305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 10/11/2022] [Accepted: 10/12/2022] [Indexed: 11/17/2022]
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8
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Yang L, Wang H, Hao W, Li T, Fang H, Bai H, Yan P, Wei S. TGFβ3 regulates adipogenesis of bovine subcutaneous preadipocytes via typical Smad and atypical MAPK signaling pathways. ELECTRON J BIOTECHN 2022. [DOI: 10.1016/j.ejbt.2022.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Rodman SN, Kluz PN, Hines MR, Oberley‐Deegan RE, Coleman MC. Sex-based differences in the severity of radiation-induced arthrofibrosis. J Orthop Res 2022; 40:2586-2596. [PMID: 35148568 PMCID: PMC9365890 DOI: 10.1002/jor.25297] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 01/23/2022] [Accepted: 02/08/2022] [Indexed: 02/04/2023]
Abstract
As cancer survivorship increases, so does the number of patients that suffer from the late effects of radiation therapy. This includes arthrofibrosis, the development of stiff joints near the field of radiation. Previous reports have concentrated on skin fibrosis around the joint but largely ignored the deeper tissues of the joint. We hypothesized that fat, muscle, and the joint tissues themselves would play a more significant role in joint contracture after radiation than the skin surrounding the joint. To address this hypothesis, we irradiated the right hind flanks of mice with fractionated and unfractionated dose schedules, then monitored the mice for 3 months postradiotherapy. Mice were euthanized and physiological indications of arthrofibrosis including limb contracture and joint resting position were assessed. Stifle (knee) joints demonstrated significant arthrofibrosis, but none was observed in the hock (ankle) joints. During these studies, we were surprised to find that male and female mice showed a significantly different response to radiation injury. Female mice developed more injuries, had significantly worse contracture, and showed a greater difference in the expression of all markers studied. These results suggest that women undergoing radiation therapy might be at significantly greater risk for developing arthrofibrosis and may require specific adjustments to their care.
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Affiliation(s)
- Samuel N. Rodman
- Department of Radiation Oncology, Free Radical and Radiation Biology Program, Holden Comprehensive Cancer CenterUniversity of IowaIowa CityIowaUSA,Department of Orthopedics and RehabilitationUniversity of Iowa Hospitals and ClinicsIowa CityIowaUSA
| | - Paige N. Kluz
- Department of Radiation Oncology, Free Radical and Radiation Biology Program, Holden Comprehensive Cancer CenterUniversity of IowaIowa CityIowaUSA,Department of Orthopedics and RehabilitationUniversity of Iowa Hospitals and ClinicsIowa CityIowaUSA,Department of Pathology and Laboratory Medicine, Human Leukocyte Antigens (HLA) LaboratoryUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
| | - Madeline R. Hines
- Department of Radiation Oncology, Free Radical and Radiation Biology Program, Holden Comprehensive Cancer CenterUniversity of IowaIowa CityIowaUSA,Department of Orthopedics and RehabilitationUniversity of Iowa Hospitals and ClinicsIowa CityIowaUSA
| | - Rebecca E. Oberley‐Deegan
- Department of Biochemistry and Molecular BiologyUniversity of Nebraska Medical CenterOmahaNebraskaUSA
| | - Mitchell C. Coleman
- Department of Radiation Oncology, Free Radical and Radiation Biology Program, Holden Comprehensive Cancer CenterUniversity of IowaIowa CityIowaUSA,Department of Orthopedics and RehabilitationUniversity of Iowa Hospitals and ClinicsIowa CityIowaUSA
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Li S, Ren L, Jia D, Yang D, Hao L. Effect of Carboxymethyl Chitin on Capsule Formation around Silicone Implants: An In Vivo and In Vitro Study. Plast Reconstr Surg 2022; 150:815-826. [PMID: 35895017 DOI: 10.1097/prs.0000000000009574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Capsular contracture is a serious complication that occurs after augmentation mammaplasty. The authors previously identified that carboxymethyl chitin had an inhibitory effect on capsule formation. This study was performed to elucidate the possible molecular mechanisms through which carboxymethyl chitin inhibits the formation of a capsule around silicone implants. METHODS In this study, the authors cultured human dermal fibroblasts and treated them with carboxymethyl chitin in vitro. The difference in proliferation between treated and untreated cells was analyzed through the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. Protein levels of transforming growth factor beta-1 and alpha smooth muscle actin (α-SMA) were examined by Western blot analysis. Expression levels of type I and type III collagen were checked by enzyme-linked immunosorbent assay. In vivo, silicone implants were placed under the pectoralis muscle in 12 female rabbits. The thickness of the capsule was measured by histologic analysis, and the effect of carboxymethyl chitin on α-SMA, collagen type I and III expression levels was evaluated by real-time polymerase chain reaction analysis, enzyme-linked immunosorbent assay, Western blot, and immunofluorescence analysis. RESULTS In the in vitro study, we confirmed that carboxymethyl chitin inhibited the proliferation of fibroblasts. The protein expression levels of collagen type I, transforming growth factor beta-1, and α-SMA were inhibited by carboxymethyl chitin treatment. In vivo, carboxymethyl chitin treatment reduced capsular thickness and the expression of α-SMA and collagen types I and III in capsules around silicone implants. CONCLUSION The authors' results showed that carboxymethyl chitin could influence capsule formation around silicone implants by inhibiting the fibroblast activity, interrupting fibroblast-to-myofibroblast differentiation, and decreasing collagen synthesis. CLINICAL RELEVANCE STATEMENT Carboxymethyl chitin influence capsule formation around silicone implants. Although more clinical studies are needed to verify the effect of carboxymethyl chitin on capsular contracture, the authors believe that it will play an effective role in the clinical application of reducing the occurrence of capsular contracture.
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Affiliation(s)
- Shasha Li
- From the Plastic and Cosmetic Center, The First Affiliated Hospital of Harbin Medical University; Department of Biochemistry, Qiqihar Medical University; and Teaching and Research Department of Biochemistry and Molecular Biology, Harbin Medical University
| | - Liwen Ren
- From the Plastic and Cosmetic Center, The First Affiliated Hospital of Harbin Medical University; Department of Biochemistry, Qiqihar Medical University; and Teaching and Research Department of Biochemistry and Molecular Biology, Harbin Medical University
| | - Di Jia
- From the Plastic and Cosmetic Center, The First Affiliated Hospital of Harbin Medical University; Department of Biochemistry, Qiqihar Medical University; and Teaching and Research Department of Biochemistry and Molecular Biology, Harbin Medical University
| | - Dan Yang
- From the Plastic and Cosmetic Center, The First Affiliated Hospital of Harbin Medical University; Department of Biochemistry, Qiqihar Medical University; and Teaching and Research Department of Biochemistry and Molecular Biology, Harbin Medical University
| | - Lijun Hao
- From the Plastic and Cosmetic Center, The First Affiliated Hospital of Harbin Medical University; Department of Biochemistry, Qiqihar Medical University; and Teaching and Research Department of Biochemistry and Molecular Biology, Harbin Medical University
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Regulation of Adipose Progenitor Cell Expansion in a Novel Micro-Physiological Model of Human Adipose Tissue Mimicking Fibrotic and Pro-Inflammatory Microenvironments. Cells 2022; 11:cells11182798. [PMID: 36139371 PMCID: PMC9496930 DOI: 10.3390/cells11182798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/31/2022] [Accepted: 09/05/2022] [Indexed: 11/17/2022] Open
Abstract
The expansion of adipose progenitor cells (APCs) plays an important role in the regeneration of the adipose tissue in physiological and pathological situations. The major role of CD26-expressing APCs in the generation of adipocytes has recently been highlighted, revealing that the CD26 APC subtype displays features of multipotent stem cells, giving rise to CD54- and CD142-expressing preadipocytes. However, a relevant human in vitro model to explore the regulation of the APC subpopulation expansion in lean and obese adipose tissue microenvironments is still lacking. In this work, we describe a novel adipose tissue model, named ExAdEx, that can be obtained from cosmetic surgery wastes. ExAdEx products are adipose tissue units maintaining the characteristics and organization of adipose tissue as it presents in vivo. The model was viable and metabolically active for up to two months and could adopt a pathological-like phenotype. The results revealed that inflammatory and fibrotic microenvironments differentially regulated the expansion of the CD26 APC subpopulation and its CD54 and CD142 APC progenies. The approach used significantly improves the method of generating adipose tissue models, and ExAdEx constitutes a relevant model that could be used to identify pathways promoting the expansion of APCs in physiological and pathological microenvironments.
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Xiong S, Tan J, Wang Y, He J, Hu F, Wu X, Liu Z, Lin S, Li X, Chen Z, Mao R. Fibrosis in fat: From other diseases to Crohn’s disease. Front Immunol 2022; 13:935275. [PMID: 36091035 PMCID: PMC9453038 DOI: 10.3389/fimmu.2022.935275] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 08/03/2022] [Indexed: 11/17/2022] Open
Abstract
Creeping fat is a specific feature of Crohn’s disease (CD) and is characterized by mesenteric fat wrapping around the intestine. It highly correlates with intestinal transmural inflammation, muscular hypertrophy, fibrosis, and stricture formation. However, the pathogenesis of creeping fat remains unclear. Molecular crosstalk exists between mesenteric fat and the intestine. Indeed, creeping fat contains different types of cells, including adipocytes and immune cells. These cell types can produce various cytokines, fatty acids, and growth factors, which affect the mesenteric fat function and modulate intestinal inflammation and immunity. Moreover, adipocyte progenitors can produce extracellular matrix to adapt to fat expansion. Previous studies have shown that fat fibrosis is an important feature of adipose tissue malfunction and exists in other diseases, including metabolic disorders, cancer, atrial fibrillation, and osteoarthritis. Furthermore, histological sections of CD showed fibrosis in the creeping fat. However, the role of fibrosis in the mesenteric fat of CD is not well understood. In this review, we summarized the possible mechanisms of fat fibrosis and its impact on other diseases. More specifically, we illustrated the role of various cells (adipocyte progenitors, macrophages, mast cells, and group 1 innate lymphoid cells) and molecules (including hypoxia-inducible factor 1-alpha, transforming growth factor-beta, platelet-derived growth factor, and peroxisome proliferator-activated receptor-gamma) in the pathogenesis of fat fibrosis in other diseases to understand the role of creeping fat fibrosis in CD pathogenesis. Future research will provide key information to decipher the role of fat fibrosis in creeping fat formation and intestinal damage, thereby helping us identify novel targets for the diagnosis and treatment of CD.
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Affiliation(s)
- Shanshan Xiong
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jinyu Tan
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yu Wang
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jinshen He
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Fan Hu
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xiaomin Wu
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Zishan Liu
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Sinan Lin
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xuehua Li
- Department of Radiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Zhihui Chen
- Gastrointestinal Surgery Center, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- *Correspondence: Ren Mao, ; Zhihui Chen,
| | - Ren Mao
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Department of Gastroenterology, Huidong People’s Hospital, Huizhou, China
- *Correspondence: Ren Mao, ; Zhihui Chen,
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13
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Roumiguié M, Estève D, Manceau C, Toulet A, Gilleron J, Belles C, Jia Y, Houël C, Pericart S, LeGonidec S, Valet P, Cormont M, Tanti JF, Malavaud B, Bouloumié A, Milhas D, Muller C. Periprostatic Adipose Tissue Displays a Chronic Hypoxic State that Limits Its Expandability. THE AMERICAN JOURNAL OF PATHOLOGY 2022; 192:926-942. [PMID: 35358473 DOI: 10.1016/j.ajpath.2022.03.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/15/2022] [Accepted: 03/08/2022] [Indexed: 06/14/2023]
Abstract
White adipose tissue accumulates at various sites throughout the body, some adipose tissue depots exist near organs whose function they influence in a paracrine manner. Prostate gland is surrounded by a poorly characterized adipose depot called periprostatic adipose tissue (PPAT), which plays emerging roles in prostate-related disorders. Unlike all other adipose depots, PPAT secretes proinflammatory cytokines even in lean individuals and does not increase in volume during obesity. These unique features remain unexplained because of the poor structural and functional characterization of this tissue. This study characterized the structural organization of PPAT in patients compared with abdominopelvic adipose tissue (APAT), an extraperitoneal adipose depot, the accumulation of which is correlated to body mass index. Confocal microscopy followed by three-dimensional reconstructions showed a sparse vascular network in PPAT when compared with that in APAT, suggesting that this tissue is hypoxic. Unbiased comparisons of PPAT and APAT transcriptomes found that most differentially expressed genes were related to the hypoxia response. High levels of the hypoxia-inducible factor 2α confirmed the presence of an adaptive response to hypoxia in PPAT. This chronic hypoxic state was associated with inflammation and fibrosis, which were not further up-regulated by obesity. This fibrosis and inflammation explain the failure of PPAT to expand in obesity and open new mechanistic avenues to explain its role in prostate-related disorders, including cancer.
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Affiliation(s)
- Mathieu Roumiguié
- Institut de Pharmacologie et Biologie Structurale (Equipe Labélisée Ligue Nationale contre le Cancer), Université de Toulouse, Centre national de la recherche scientifique, Toulouse, France; Département d'Urologie, Institut Universitaire du Cancer, Toulouse, France
| | - David Estève
- Institut de Pharmacologie et Biologie Structurale (Equipe Labélisée Ligue Nationale contre le Cancer), Université de Toulouse, Centre national de la recherche scientifique, Toulouse, France
| | - Cécile Manceau
- Institut de Pharmacologie et Biologie Structurale (Equipe Labélisée Ligue Nationale contre le Cancer), Université de Toulouse, Centre national de la recherche scientifique, Toulouse, France; Département d'Urologie, Institut Universitaire du Cancer, Toulouse, France
| | - Aurélie Toulet
- Institut de Pharmacologie et Biologie Structurale (Equipe Labélisée Ligue Nationale contre le Cancer), Université de Toulouse, Centre national de la recherche scientifique, Toulouse, France
| | - Jérôme Gilleron
- Université Côte d'Azur, INSERM, Centre Méditerranéen de Médecine Moléculaire, Team Cellular and Molecular Pathophysiology of Obesity, Nice, France
| | - Chloé Belles
- Institut des Maladies Métaboliques et Cardiovasculaires, Université de Toulouse, INSERM, Toulouse, France
| | - Yiyue Jia
- Institut de Pharmacologie et Biologie Structurale (Equipe Labélisée Ligue Nationale contre le Cancer), Université de Toulouse, Centre national de la recherche scientifique, Toulouse, France
| | - Cynthia Houël
- Institut de Pharmacologie et Biologie Structurale (Equipe Labélisée Ligue Nationale contre le Cancer), Université de Toulouse, Centre national de la recherche scientifique, Toulouse, France
| | - Sarah Pericart
- Département d'Anatomo-Pathologie, Institut Universitaire du Cancer, Toulouse, France
| | - Sophie LeGonidec
- Institut RESTORE, Université de Toulouse, Centre national de la recherche scientifique U-5070, Etablissement Français du Sang, Ecole Nationale Vétérinaire de Toulouse, INSERM U1301, Toulouse, France
| | - Philippe Valet
- Institut RESTORE, Université de Toulouse, Centre national de la recherche scientifique U-5070, Etablissement Français du Sang, Ecole Nationale Vétérinaire de Toulouse, INSERM U1301, Toulouse, France
| | - Mireille Cormont
- Université Côte d'Azur, INSERM, Centre Méditerranéen de Médecine Moléculaire, Team Cellular and Molecular Pathophysiology of Obesity, Nice, France
| | - Jean-François Tanti
- Université Côte d'Azur, INSERM, Centre Méditerranéen de Médecine Moléculaire, Team Cellular and Molecular Pathophysiology of Obesity, Nice, France
| | - Bernard Malavaud
- Département d'Urologie, Institut Universitaire du Cancer, Toulouse, France
| | - Anne Bouloumié
- Institut des Maladies Métaboliques et Cardiovasculaires, Université de Toulouse, INSERM, Toulouse, France
| | - Delphine Milhas
- Institut de Pharmacologie et Biologie Structurale (Equipe Labélisée Ligue Nationale contre le Cancer), Université de Toulouse, Centre national de la recherche scientifique, Toulouse, France.
| | - Catherine Muller
- Institut de Pharmacologie et Biologie Structurale (Equipe Labélisée Ligue Nationale contre le Cancer), Université de Toulouse, Centre national de la recherche scientifique, Toulouse, France.
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Song L, Li H, Liu Y, Zhang X, Wen Y, Zhang K, Zhang M. Postnatal deletion of β-catenin in preosteoblasts regulates global energy metabolism through increasing bone resorption and adipose tissue fibrosis. Bone 2022; 156:116320. [PMID: 34973494 DOI: 10.1016/j.bone.2021.116320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 12/12/2021] [Accepted: 12/22/2021] [Indexed: 11/02/2022]
Abstract
Many studies revealed bone can regulate global energy metabolism and our previous study also showed that Wnt/β-catenin pathway is involved in this process. To better understand the participation of canonical Wnt pathway in energy metabolism, we examined the β-catenin knock-out (β-cat KO) mice by crossing the osterix-cre transgenic mice with β-cateninflox/flox mice. First, we identified that postnatal deletion of β-catenin in preosteoblasts led to decreased fat mass and increased energy expenditure in mice. Osteoprotegerin administration largely rescued the decreased fat mass and partly normalized the energy expenditure accompanied by the inhibition of bone resorption. Anti-resorption with alendronate or RANKL-antibody could also partly rescued the decreased bone mass, decreased fat mass and increased energy expenditure in β-cat KO mice. We further found that the adipose cells in the inguinal fat tissue were smaller and the extracellular matrix components around adipocytes accumulated more in β-cat KO mice than their controls by histomorphology. Gene analysis by RT-PCR showed that the expression of collagen VI is 4.8 folds in adipose tissue of the β-cat KO mice compared with the control mice. We further detected the expression of cytokines which were related to fibrosis and the data showed that the level of TGF-beta1 was elevated in both of bone marrow serum and adipose tissue derived from the β-cat KO mice. After administration of TGF-beta1 neutralizing antibody, the impaired energy metabolism was partly rescued in β-cat KO mice. Besides, anti-resorption treatment and TGF-beta1 antibody could partly suppress the increased expression of genes related to fat tissue fibrosis. These results indicate that the abnormal global energy metabolism in β-cat KO mice may be attributed to increasing bone resorption and adipose tissue fibrosis.
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Affiliation(s)
- Lige Song
- Department of Endocrinology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, 200065, China; Institute of Osteoporosis and Metabolic Bone Diseases, School of Medicine, Tongji University, Shanghai, 200065, China.
| | - Huijuan Li
- Department of Endocrinology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, 200065, China; Institute of Osteoporosis and Metabolic Bone Diseases, School of Medicine, Tongji University, Shanghai, 200065, China
| | - Yichen Liu
- Department of Endocrinology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, 200065, China; Institute of Osteoporosis and Metabolic Bone Diseases, School of Medicine, Tongji University, Shanghai, 200065, China
| | - Xiaoya Zhang
- Department of Endocrinology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, 200065, China; Institute of Osteoporosis and Metabolic Bone Diseases, School of Medicine, Tongji University, Shanghai, 200065, China
| | - Yuhua Wen
- Department of Endocrinology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, 200065, China; Institute of Osteoporosis and Metabolic Bone Diseases, School of Medicine, Tongji University, Shanghai, 200065, China
| | - Keqin Zhang
- Department of Endocrinology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, 200065, China; Institute of Osteoporosis and Metabolic Bone Diseases, School of Medicine, Tongji University, Shanghai, 200065, China.
| | - Mingzhu Zhang
- Center of Foot and Ankle Surgery, Beijing Tongren Hospital, Capital Medical University, 1 Dongjiao Minxiang, West Area, Beijing, 100730, China.
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15
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Sarsenbayeva A, Pereira MJ, Nandi Jui B, Ahmed F, Dipta P, Fanni G, Almby K, Kristófi R, Hetty S, Eriksson JW. Excess glucocorticoid exposure contributes to adipose tissue fibrosis which involves macrophage interaction with adipose precursor cells. Biochem Pharmacol 2022; 198:114976. [PMID: 35202577 DOI: 10.1016/j.bcp.2022.114976] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 02/17/2022] [Accepted: 02/17/2022] [Indexed: 12/12/2022]
Abstract
Chronic exposure to elevated glucocorticoid levels, as seen in patients with Cushing's syndrome, can induce adipose tissue fibrosis. Macrophages play a pivotal role in adipose tissue remodelling. We used the synthetic glucocorticoid analogue dexamethasone to address glucocorticoid effects on adipose tissue fibrosis, in particular involving macrophage to preadipocyte communication. We analysed the direct effects of dexamethasone at a supra-physiological level, 0.3 µM, on gene expression of pro-fibrotic markers in human subcutaneous adipose tissue. The effects of dexamethasone on the differentiation of human SGBS preadipocytes were assessed in the presence or absence of THP1-macrophages or macrophage-conditioned medium. We measured the expression of different pro-fibrotic factors, including α-smooth muscle actin gene (ACTA2) and protein (α-SMA). Dexamethasone increased the expression of pro-fibrotic genes, e.g. CTGF, COL6A3, FN1, in adipose tissue. Macrophages abolished preadipocyte differentiation and increased the expression of the ACTA2 gene and α-SMA protein in preadipocytes after differentiation. Exposure to dexamethasone during differentiation reduced adipogenesis in preadipocytes, and elevated the expression of pro-fibrotic genes. Moreover, dexamethasone added together with macrophages further increased ACTA2 and α-SMA expression in preadipocytes, making them more myofibroblast-like. Cells differentiated in the presence of conditioned media from macrophages pretreated with or without dexamethasone had a higher expression of profibrotic genes compared to control cells. Our data suggest that macrophages promote adipose tissue fibrosis by directly interfering with preadipocyte differentiation and stimulating gene expression of pro-fibrotic factors. Excess glucocorticoid exposure also has pro-fibrotic effect on adipose tissue, but this requires the presence of macrophages.
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Affiliation(s)
- Assel Sarsenbayeva
- Department of Medical Sciences, Clinical Diabetes and Metabolism, Uppsala University, Uppsala, Sweden
| | - Maria J Pereira
- Department of Medical Sciences, Clinical Diabetes and Metabolism, Uppsala University, Uppsala, Sweden
| | - Bipasha Nandi Jui
- Department of Medical Sciences, Clinical Diabetes and Metabolism, Uppsala University, Uppsala, Sweden
| | - Fozia Ahmed
- Department of Medical Sciences, Clinical Diabetes and Metabolism, Uppsala University, Uppsala, Sweden
| | - Priya Dipta
- Department of Pharmacology, Faculty of Medicine, Hadassah Medical Centre, Jerusalem, Israel
| | - Giovanni Fanni
- Department of Medical Sciences, Clinical Diabetes and Metabolism, Uppsala University, Uppsala, Sweden
| | - Kristina Almby
- Department of Medical Sciences, Clinical Diabetes and Metabolism, Uppsala University, Uppsala, Sweden
| | - Robin Kristófi
- Department of Medical Sciences, Clinical Diabetes and Metabolism, Uppsala University, Uppsala, Sweden
| | - Susanne Hetty
- Department of Medical Sciences, Clinical Diabetes and Metabolism, Uppsala University, Uppsala, Sweden
| | - Jan W Eriksson
- Department of Medical Sciences, Clinical Diabetes and Metabolism, Uppsala University, Uppsala, Sweden.
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16
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Liu X, Chu H, Ji Y, Bosnjak Z, Ao H, Li T. Which BMI for Diabetes Patients is Better? From the View of the Adipose Tissue Macrophage-Derived Exosome. Diabetes Metab Syndr Obes 2022; 15:141-153. [PMID: 35046685 PMCID: PMC8763208 DOI: 10.2147/dmso.s345890] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 12/24/2021] [Indexed: 12/13/2022] Open
Abstract
PURPOSE Diabetes, as a group of metabolic diseases, can elevate blood glucose, thus leading to the development of life-threatening complications. It is difficult to define the outcome for diabetics with different BMI. This review will illustrate the adipose tissue macrophage-derived exosome in the diabetics with different BMI. PATIENTS AND METHODS Insulin resistance in peripheral tissues can cause diabetes. The peripheral tissues include liver, muscle, or the adipose depots. Communication between these organs is fatal to the maintenance of glucose homeostasis. This review will illustrate this communication. Obesity is closely linked with diabetes. There are different changes in fat distribution in diabetic patients. Adipose tissue macrophages can secrete various hormones, including adiponectin, leptin, resistin and other classical cytokines, such as TNF-α and IL-6. Studies illustrated that exosomes from the adipose tissue, can modulate inter-organ cross-talk by regulating gene expression in other tissues. RESULTS Adipose tissue macrophages exosomes links thin and fat individuals in the development of diabetes. CONCLUSION The molecular pathways initiated by exosomes such as miRNA in the situations of metabolic stress could help us gain a deeper knowledge of the pathophysiology of diabetes.
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Affiliation(s)
- Xiaojie Liu
- Department of Anesthesiology, Affiliated Hospital of Qingdao University, Qingdao, Shandong Province, People’s Republic of China
- Departments of Medicine and Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
- Department of Anesthesiology, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People’s Republic of China
| | - Haichen Chu
- Department of Anesthesiology, Affiliated Hospital of Qingdao University, Qingdao, Shandong Province, People’s Republic of China
| | - Yuzhi Ji
- Obstetrics, Affiliated Hospital of Qingdao University, Qingdao, Shandong Province, People’s Republic of China
| | - Zeljko Bosnjak
- Departments of Medicine and Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Hushan Ao
- Department of Anesthesiology, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People’s Republic of China
- Correspondence: Hushan Ao Department of Anesthesiology, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No.167 North Lishi Road, Xicheng District, Beijing, People’s Republic of ChinaTel/Fax +86-10-68006210 Email
| | - Tianjun Li
- Department of Oncology, Affiliated Hospital of Qingdao University, Qingdao, Shandong Province, People’s Republic of China
- Tianjun Li Department of Oncology, Affiliated Hospital of Qingdao University, No. 59 Haier Road, Laoshan District, Qingdao, Shandong Province, People’s Republic of ChinaTel/Fax +86-10-82913035 Email
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17
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Felicidade I, Bocchi M, Ramos MRZ, Carlos LDO, Wagner NRF, Campos ACL, Ribeiro LR, Mantovani MS, Watanabe MAE, Vitiello GAF. Transforming growth factor beta 1 (TGFβ1) plasmatic levels and haplotype structures in obesity: a role for TGFβ1 in steatosis development. Mol Biol Rep 2021; 48:6401-6411. [PMID: 34403036 DOI: 10.1007/s11033-021-06640-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 08/10/2021] [Indexed: 11/25/2022]
Abstract
BACKGROUND Obesity is considered a chronic inflammatory disease and transforming growth factor beta 1 (TGFβ1) might exert important roles in disease pathogenesis regulating adipocyte differentiation and immune-inflammatory environment. However, the role of this cytokine as a biomarker in obesity is poorly addressed. Therefore, the present study aimed to evaluate the impact of TGFB1 polymorphisms and TGFβ1 plasmatic levels in obesity METHODS AND RESULTS: TGFB1 promoter region polymorphisms (rs1800468, G-800A and rs1800469, C-509 T) were evaluated in 75 obese patients and 45 eutrophic patients through PCR-RFLP and plasmatic TGFβ1 was quantified through ELISA from 37 of the obese patients, and correlations with clinical and biochemical parameters were tested. Despite no association was found between TGFB1 polymorphisms and obesity susceptibility, several correlations with clinical data were noted. Among others, AC haplotype negatively correlated with plasmatic TGFβ1, while plasmatic TGFβ1 negatively correlated with C-reactive protein and positively correlated with liver abnormalities on ultrasound and, specifically, with steatosis presence and degree. Conversely, GT haplotype, which associates with higher TGFβ1 production, was also positively correlated with the same parameters of liver abnormalities. Further, plasmatic vitamin D negatively correlated with TGFβ1, while positively correlated with AC haplotype. CONCLUSION Overall, the results indicate that TGFβ1 might exert important roles in obesity pathophysiology and correlate with biochemical and clinical parameters both at systemic protein as well as at genetic level. Importantly, the consistent positive correlation at both levels with steatosis might suggest this cytokine as a biomarker for this hepatic abnormality in obese patients.
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Affiliation(s)
- Ingrid Felicidade
- Department of General Biology, Biological Sciences Center, Londrina State University (UEL), Londrina, PR, Brazil
- School of Medicine, Department of Pathology, São Paulo State University (UNESP), São Paulo, SP, Brazil
| | - Mayara Bocchi
- Department of Pathological Sciences, Biological Sciences Center, Londrina State University (UEL), Londrina, PR, Brazil
| | | | | | | | | | - Lúcia Regina Ribeiro
- School of Medicine, Department of Pathology, São Paulo State University (UNESP), São Paulo, SP, Brazil
| | - Mário Sérgio Mantovani
- Department of General Biology, Biological Sciences Center, Londrina State University (UEL), Londrina, PR, Brazil
| | - Maria Angelica Ehara Watanabe
- Department of Pathological Sciences, Biological Sciences Center, Londrina State University (UEL), Londrina, PR, Brazil
| | - Glauco Akelinghton Freire Vitiello
- Department of Pathological Sciences, Biological Sciences Center, Londrina State University (UEL), Londrina, PR, Brazil.
- Laboratory of DNA Polymorphisms and Immunology, Department of Pathological Sciences, Biological Sciences Center, State University of Londrina, PR445, Km 380 Celso Garcia Cid highway, Londrina, PR, 86057-970, Brazil.
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18
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Woo J, Koziol-White C, Panettieri R, Jude J. TGF-β: The missing link in obesity-associated airway diseases? CURRENT RESEARCH IN PHARMACOLOGY AND DRUG DISCOVERY 2021; 2:100016. [PMID: 34909651 PMCID: PMC8663968 DOI: 10.1016/j.crphar.2021.100016] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 01/15/2021] [Accepted: 01/20/2021] [Indexed: 01/19/2023] Open
Abstract
Obesity is emerging as a global public health epidemic. The co-morbidities associated with obesity significantly contribute to reduced quality of life, mortality, and global healthcare burden. Compared to other asthma comorbidities, obesity prominently engenders susceptibility to inflammatory airway diseases such as asthma and chronic obstructive pulmonary disease (COPD), contributes to greater disease severity and evokes insensitivity to current therapies. Unlike in other metabolic diseases associated with obesity, the mechanistic link between obesity and airway diseases is only poorly defined. Transforming growth factor-β (TGF-β) is a pleiotropic inflammatory cytokine belonging to a family of growth factors with pivotal roles in asthma. In this review, we summarize the role of TGF-β in major obesity-associated co-morbidities to shed light on mechanisms of the diseases. Literature evidence shows that TGF-β mechanistically links many co-morbidities with obesity through its profibrotic, remodeling, and proinflammatory functions. We posit that TGF-β plays a similar mechanistic role in obesity-associated inflammatory airway diseases such as asthma and COPD. Concerning the role of TGF-β on metabolic effects of obesity, we posit that TGF-β has a similar mechanistic role in obesity-associated inflammatory airway diseases in interplay with different comorbidities such as hypertension, metabolic diseases like type 2 diabetes, and cardiomyopathies. Future studies in TGF-β-dependent mechanisms in obesity-associated inflammatory airway diseases will advance our understanding of obesity-induced asthma and help find novel therapeutic targets for prevention and treatment.
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Affiliation(s)
- Joanna Woo
- Rutgers Institute for Translational Medicine & Science, The State University of New Jersey, 89 French Street, Rutgers, 160 Frelinghuysen Road, Piscataway, NJ08854, United States,Ernest Mario School of Pharmacy, The State University of New Jersey, 89 French Street, Rutgers, 160 Frelinghuysen Road, Piscataway, NJ08854, United States
| | - Cynthia Koziol-White
- Rutgers Institute for Translational Medicine & Science, The State University of New Jersey, 89 French Street, Rutgers, 160 Frelinghuysen Road, Piscataway, NJ08854, United States,Robert Wood Johnson Medical School, The State University of New Jersey, 89 French Street, Rutgers, 160 Frelinghuysen Road, Piscataway, NJ08854, United States
| | - Reynold Panettieri
- Rutgers Institute for Translational Medicine & Science, The State University of New Jersey, 89 French Street, Rutgers, 160 Frelinghuysen Road, Piscataway, NJ08854, United States,Robert Wood Johnson Medical School, The State University of New Jersey, 89 French Street, Rutgers, 160 Frelinghuysen Road, Piscataway, NJ08854, United States,Ernest Mario School of Pharmacy, The State University of New Jersey, 89 French Street, Rutgers, 160 Frelinghuysen Road, Piscataway, NJ08854, United States
| | - Joseph Jude
- Rutgers Institute for Translational Medicine & Science, The State University of New Jersey, 89 French Street, Rutgers, 160 Frelinghuysen Road, Piscataway, NJ08854, United States,Robert Wood Johnson Medical School, The State University of New Jersey, 89 French Street, Rutgers, 160 Frelinghuysen Road, Piscataway, NJ08854, United States,Ernest Mario School of Pharmacy, The State University of New Jersey, 89 French Street, Rutgers, 160 Frelinghuysen Road, Piscataway, NJ08854, United States,Corresponding author. Rutgers Institute for Translational Medicine & Science, Rm# 4276, 89 French Street, New Brunswick, NJ08901, United States.
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19
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Boulet N, Galitzky J. [Lobular architecture of human adipose tissue defines niches shaping progenitor cell fates]. Med Sci (Paris) 2020; 36:197-200. [PMID: 32228831 DOI: 10.1051/medsci/2020039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Nathalie Boulet
- Inserm UMR 1048, équipe 1, Institut des maladies métaboliques et cardiovasculaires (I2MC), Université de Toulouse, BP84225, 31432 Toulouse Cedex 4, France
| | - Jean Galitzky
- Inserm UMR 1048, équipe 1, Institut des maladies métaboliques et cardiovasculaires (I2MC), Université de Toulouse, BP84225, 31432 Toulouse Cedex 4, France
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20
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Heffer AM, Proaño J, Roztocil E, Phipps RP, Feldon SE, Huxlin KR, Sime PJ, Libby RT, Woeller CF, Kuriyan AE. The polyether ionophore salinomycin targets multiple cellular pathways to block proliferative vitreoretinopathy pathology. PLoS One 2019; 14:e0222596. [PMID: 31527897 PMCID: PMC6748436 DOI: 10.1371/journal.pone.0222596] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 09/02/2019] [Indexed: 11/21/2022] Open
Abstract
Proliferative vitreoretinopathy (PVR) is characterized by membranes that form in the vitreous cavity and on both surfaces of the retina, which results in the formation of tractional membranes that can cause retinal detachment and intrinsic fibrosis of the retina, leading to retina foreshortening. Currently, there are no pharmacologic therapies that are effective in inhibiting or preventing PVR formation. One of the key aspects of PVR pathogenesis is retinal pigment epithelial (RPE) cell epithelial mesenchymal transition (EMT). Here we show that the polyether ionophore compound salinomycin (SNC) effectively inhibits TGFβ-induced EMT of RPE cells. SNC blocks the activation of TGFβ-induced downstream targets alpha smooth muscle actin (αSMA) and collagen 1 (Col1A1). Additionally, SNC inhibits TGFβ-induced RPE cell migration and contraction. We show that SNC functions to inhibit RPE EMT by targeting both the pTAK1/p38 and Smad2 signaling pathways upon TGFβ stimulation. Additionally, SNC is able to inhibit αSMA and Col1A1 expression in RPE cells that have already undergone TGFβ-induced EMT. Together, these results suggest that SNC could be an effective therapeutic compound in both the prevention and treatment of PVR.
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Affiliation(s)
- Alison M. Heffer
- Flaum Eye Institute, University of Rochester, Rochester, NY, United States of America
- * E-mail: (AH); (AK); (CFW)
| | - Jacob Proaño
- Flaum Eye Institute, University of Rochester, Rochester, NY, United States of America
| | - Elisa Roztocil
- Flaum Eye Institute, University of Rochester, Rochester, NY, United States of America
| | - Richard P. Phipps
- Department of Environmental Medicine, University of Rochester, Rochester, NY, United States of America
| | - Steven E. Feldon
- Flaum Eye Institute, University of Rochester, Rochester, NY, United States of America
- Center for Visual Sciences, University of Rochester, Rochester, NY, United States of America
| | - Krystel R. Huxlin
- Flaum Eye Institute, University of Rochester, Rochester, NY, United States of America
- Center for Visual Sciences, University of Rochester, Rochester, NY, United States of America
| | - Patricia J. Sime
- Department of Medicine, University of Rochester, Rochester, NY, United States of America
| | - Richard T. Libby
- Flaum Eye Institute, University of Rochester, Rochester, NY, United States of America
- Center for Visual Sciences, University of Rochester, Rochester, NY, United States of America
| | - Collynn F. Woeller
- Flaum Eye Institute, University of Rochester, Rochester, NY, United States of America
- * E-mail: (AH); (AK); (CFW)
| | - Ajay E. Kuriyan
- Flaum Eye Institute, University of Rochester, Rochester, NY, United States of America
- Center for Visual Sciences, University of Rochester, Rochester, NY, United States of America
- * E-mail: (AH); (AK); (CFW)
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Yang IH, Rose GE, Ezra DG, Bailly M. Macrophages promote a profibrotic phenotype in orbital fibroblasts through increased hyaluronic acid production and cell contractility. Sci Rep 2019; 9:9622. [PMID: 31270379 PMCID: PMC6610127 DOI: 10.1038/s41598-019-46075-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 06/21/2019] [Indexed: 12/29/2022] Open
Abstract
Graves’ orbitopathy (GO) is an autoimmune inflammatory disease affecting the orbit. Orbital fibroblasts are a key component in GO pathogenesis, which includes inflammation, adipogenesis, hyaluronic acid (HA) secretion, and fibrosis. Macrophages are thought to participate in the immunological stage of GO, but whether they can directly affect the fibroblasts phenotype and modulate disease progression is unknown. We previously showed that GO adipogenic and fibrotic phenotypes could be modelled in a pseudo-physiological 3D environment in vitro. Here, we introduced macrophages in this 3D culture model to investigate role for macrophages in modulating adipogenesis, HA production, and contractility in orbital fibroblasts. Macrophages had a minimal effect on lipid droplet formation in fibroblasts, but significantly increased HA production and cell contractility, suggesting that they may promote the fibrotic phenotype. This effect was found to be mediated at least in part through phosphatidylinositol-4,5-bisphosphate 3-kinase (PI3K) activation and linked to an increase in actin polymerization and protrusive activity in fibroblasts. Overall our work shows for the first time a direct role for macrophages in modulating the fibroblasts’ phenotype in GO, supporting a role for macrophages in the progression of the fibrotic phenotype through induction of HA production and stimulation of the contractile phenotype in orbital fibroblasts.
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Affiliation(s)
- I-Hui Yang
- UCL Institute of Ophthalmology, London, EC1V 9EL, UK.,Department of Ophthalmology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Geoffrey E Rose
- Department of Adnexal Surgery, Moorfields Eye Hospital, London, EC1V 2PD, UK
| | - Daniel G Ezra
- UCL Institute of Ophthalmology, London, EC1V 9EL, UK.,Department of Adnexal Surgery, Moorfields Eye Hospital, London, EC1V 2PD, UK.,NIHR Biomedical Research Centre for Ophthalmology, Moorfields Eye Hospital, City Road, London, EC1V 2PD, UK
| | - Maryse Bailly
- UCL Institute of Ophthalmology, London, EC1V 9EL, UK.
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Lobular architecture of human adipose tissue defines the niche and fate of progenitor cells. Nat Commun 2019; 10:2549. [PMID: 31186409 PMCID: PMC6560121 DOI: 10.1038/s41467-019-09992-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 04/12/2019] [Indexed: 01/07/2023] Open
Abstract
Human adipose tissue (hAT) is constituted of structural units termed lobules, the organization of which remains to be defined. Here we report that lobules are composed of two extracellular matrix compartments, i.e., septa and stroma, delineating niches of CD45-/CD34+/CD31- progenitor subsets characterized by MSCA1 (ALPL) and CD271 (NGFR) expression. MSCA1+ adipogenic subset is enriched in stroma while septa contains mainly MSCA1-/CD271- and MSCA1-/CD271high progenitors. CD271 marks myofibroblast precursors and NGF ligand activation is a molecular relay of TGFβ-induced myofibroblast conversion. In human subcutaneous (SC) and visceral (VS) AT, the progenitor subset repartition is different, modulated by obesity and in favor of adipocyte and myofibroblast fate, respectively. Lobules exhibit depot-specific architecture with marked fibrous septa containing mesothelial-like progenitor cells in VSAT. Thus, the human AT lobule organization in specific progenitor subset domains defines the fat depot intrinsic capacity to remodel and may contribute to obesity-associated cardiometabolic risks.
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Adipose-Derived Tissue in the Treatment of Dermal Fibrosis: Antifibrotic Effects of Adipose-Derived Stem Cells. Ann Plast Surg 2019; 80:297-307. [PMID: 29309331 DOI: 10.1097/sap.0000000000001278] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Treatment of hypertrophic scars and other fibrotic skin conditions with autologous fat injections shows promising clinical results; however, the underlying mechanisms of its antifibrotic action have not been comprehensively studied. Adipose-derived stem cells, or stromal cell-derived factors, inherent components of the transplanted fat tissue, seem to be responsible for its therapeutic effects on difficult scars. The mechanisms by which this therapeutic effect takes place are diverse and are mostly mediated by paracrine signaling, which switches on various antifibrotic molecular pathways, modulates the activity of the central profibrotic transforming growth factor β/Smad pathway, and normalizes functioning of fibroblasts and keratinocytes in the recipient site. Direct cell-to-cell communications and differentiation of cell types may also play a positive role in scar treatment, even though they have not been extensively studied in this context. A more thorough understanding of the fat tissue antifibrotic mechanisms of action will turn this treatment from an anecdotal remedy to a more controlled, timely administered technology.
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24
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Impact of HIV/simian immunodeficiency virus infection and viral proteins on adipose tissue fibrosis and adipogenesis. AIDS 2019; 33:953-964. [PMID: 30946149 DOI: 10.1097/qad.0000000000002168] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE HIV-infected patients receiving antiretroviral treatment (ART) often present adipose tissue accumulation and/or redistribution. adipose tissue has been shown to be an HIV/SIV reservoir and viral proteins as Tat or Nef can be released by infected immune cells and exert a bystander effect on adipocytes or precursors. Our aim was to demonstrate that SIV/HIV infection per se could alter adipose tissue structure and/or function. DESIGN Morphological and functional alterations of subcutaneous (SCAT) and visceral adipose tissue (VAT) were studied in SIV-infected macaques and HIV-infected ART-controlled patients. To analyze the effect of Tat or Nef, we used human adipose stem cells (ASCs) issued from healthy donors, and analyzed adipogenesis and extracellular matrix component production using two dimensional (2D) and three-dimensional (3D) culture models. METHODS Adipocyte size and index of fibrosis were determined on Sirius red-stained adipose tissue samples. Proliferating and adipocyte 2D-differentiating or 3D-differentiating ASCs were treated chronically with Tat or Nef. mRNA, protein expression and secretion were examined by RT-PCR, western-blot and ELISA. RESULTS SCAT and VAT from SIV-infected macaques displayed small adipocytes, decreased adipogenesis and severe fibrosis with collagen deposition. SCAT and VAT from HIV-infected ART-controlled patients presented similar alterations. In vitro, Tat and/or Nef induced a profibrotic phenotype in undifferentiated ASCs and altered adipogenesis and collagen production in adipocyte-differentiating ASCs. CONCLUSION We demonstrate here a specific role for HIV/SIV infection per se on adipose tissue fibrosis and adipogenesis, probably through the release of viral proteins, which could be involved in adipose tissue dysfunction contributing to cardiometabolic alterations of HIV-infected individuals.
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26
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Lee MJ, Pickering RT, Shibad V, Wu Y, Karastergiou K, Jager M, Layne MD, Fried SK. Impaired Glucocorticoid Suppression of TGFβ Signaling in Human Omental Adipose Tissues Limits Adipogenesis and May Promote Fibrosis. Diabetes 2019; 68:587-597. [PMID: 30530781 PMCID: PMC6385749 DOI: 10.2337/db18-0955] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 11/26/2018] [Indexed: 12/18/2022]
Abstract
Visceral obesity is associated with insulin resistance and higher risk of type 2 diabetes and metabolic diseases. A limited ability of adipose tissues to remodel through the recruitment and differentiation of adipose stem cells (ASCs) is associated with adipose tissue inflammation and fibrosis and the metabolic syndrome. We show that the lower adipogenesis of omental (Om) compared with abdominal subcutaneous (Abdsc) ASCs was associated with greater secretion of TGFβ ligands that acted in an autocrine/paracrine loop to activate SMAD2 and suppress adipogenesis. Inhibition of TGFβ signaling rescued Om ASC differentiation. In Abdsc ASCs, low concentrations of dexamethasone suppressed TGFβ signaling and enhanced adipogenesis, at least in part by increasing TGFBR3 protein that can sequester TGFβ ligands. Om ASCs were resistant to these dexamethasone effects; recombinant TGFBR3 increased their differentiation. Pericellular fibrosis, a hallmark of dysfunctional adipose tissue, was greater in Om and correlated with higher level of tissue TGFβ signaling activity and lower ASC differentiation. We conclude that glucocorticoids restrain cell-autonomous TGFβ signaling in ASCs to facilitate adipogenesis and healthy remodeling in Abdsc and these processes are impaired in Om. Therapies directed at overcoming glucocorticoid resistance in visceral adipose tissue may improve remodeling and help prevent metabolic complications of visceral obesity.
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Affiliation(s)
- Mi-Jeong Lee
- Diabetes Obesity and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY
- Obesity Research Center, Boston University School of Medicine, Boston, MA
| | - R Taylor Pickering
- Diabetes Obesity and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY
- Obesity Research Center, Boston University School of Medicine, Boston, MA
| | - Varuna Shibad
- Obesity Research Center, Boston University School of Medicine, Boston, MA
| | - Yuanyuan Wu
- Obesity Research Center, Boston University School of Medicine, Boston, MA
| | - Kalypso Karastergiou
- Diabetes Obesity and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY
- Obesity Research Center, Boston University School of Medicine, Boston, MA
| | - Mike Jager
- Department of Biochemistry, Boston University School of Medicine, Boston, MA
| | - Matthew D Layne
- Department of Biochemistry, Boston University School of Medicine, Boston, MA
| | - Susan K Fried
- Diabetes Obesity and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY
- Obesity Research Center, Boston University School of Medicine, Boston, MA
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27
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Jia G, Sowers JR. Increased Fibro-Adipogenic Progenitors and Intramyocellular Lipid Accumulation in Obesity-Related Skeletal Muscle Dysfunction. Diabetes 2019; 68:18-20. [PMID: 30573676 PMCID: PMC6302534 DOI: 10.2337/dbi18-0047] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Guanghong Jia
- Diabetes and Cardiovascular Research Center, University of Missouri School of Medicine, Columbia, MO
- Harry S. Truman Memorial Veterans' Hospital, Columbia, MO
| | - James R Sowers
- Diabetes and Cardiovascular Research Center, University of Missouri School of Medicine, Columbia, MO
- Harry S. Truman Memorial Veterans' Hospital, Columbia, MO
- Department of Medical Pharmacology and Physiology, University of Missouri School of Medicine, Columbia, MO
- Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO
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Yao X, Dani V, Dani C. Human Pluripotent Stem Cells: A Relevant Model to Identify Pathways Governing Thermogenic Adipocyte Generation. Front Endocrinol (Lausanne) 2019; 10:932. [PMID: 32038489 PMCID: PMC6990109 DOI: 10.3389/fendo.2019.00932] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 12/20/2019] [Indexed: 01/19/2023] Open
Abstract
Brown and brown-like adipocytes (BAs) are promising cell targets to counteract obesity thanks to their potential to drain and oxidize circulating glucose and triglycerides. However, the scarcity of BAs in human adults is a major limitation for energy expenditure based therapies. Enhanced characterization of BA progenitor cells (BAPs) and identification of critical pathways regulating their generation and differentiation into mature BAs would be an effective way to increase the BA mass. The identification of molecular mechanisms involved in the generation of thermogenic adipocytes is progressing substantially in mice. Much less is known in humans, thus highlighting the need for an in vitro model of human adipocyte development. Pluripotent stem cells (PSCs), i.e., embryonic stem cells and induced pluripotent stem cells, help gain insight into the different phases in the development of multiple cell types. We will discuss the capacity of human PSCs to differentiate into BAs in this review. Several groups, including ours, have reported low spontaneous adipocyte generation from PSCs. However, factors governing the differentiation of induced pluripotent stem cell-derived BA progenitors cells were recently identified, and the TGFβ signaling pathway has a pivotal role. The development of new relevant methods, such as the differentiation of hPSC-BAPs into 3D adipospheres to better mimick the lobular structure of human adipose tissue, will also be discussed. Differentiation of human PSCs into thermogenic adipocytes at high frequency provides an opportunity to characterize new targets for anti-obesity therapy.
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29
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Liu B, Page AJ, Hatzinikolas G, Chen M, Wittert GA, Heilbronn LK. Intermittent Fasting Improves Glucose Tolerance and Promotes Adipose Tissue Remodeling in Male Mice Fed a High-Fat Diet. Endocrinology 2019; 160:169-180. [PMID: 30476012 DOI: 10.1210/en.2018-00701] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 11/15/2018] [Indexed: 02/06/2023]
Abstract
Obesity is associated with increased macrophage and extracellular matrix accumulation in adipose tissue, which can be partially reversed following weight loss by daily caloric restriction. This study examined the effects of 8 weeks of intermittent fasting (IF; 24-hour fast on 3 nonconsecutive days per week) in mice fed a chow or high-fat diet (HFD; 43% fat) on markers of adipose tissue inflammation and fibrosis. We found that IF decreased energy intake, body weight, and fat cell size in HFD-fed mice and decreased fat mass and improved glucose tolerance in chow- and HFD-fed mice. IF decreased mRNA levels of macrophage markers (Lgals3, Itgax, Ccl2, and Ccl3) in inguinal and gonadal fat, as well as adipose tissue macrophage numbers in HFD-fed mice only, and altered genes involved in NLRP3 inflammasome pathway in both diet groups. IF increased mRNA levels of matrix metallopeptidase 9, which is involved in extracellular matrix degradation, and reduced mRNA levels of collagen 6 α-1 and tissue inhibitor of matrix metallopeptidase 1, as well as fibrosis in gonadal fat in HFD-fed mice. In summary, our results show that intermittent fasting improved glucose tolerance in chow- and HFD-fed mice and ameliorated adipose tissue inflammation and fibrosis in HFD-fed mice.
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Affiliation(s)
- Bo Liu
- Centre for Nutrition and Gastrointestinal Disease, Adelaide Medical School, University of Adelaide, Adelaide, South Australia, Australia
- Nutrition and Metabolism, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
| | - Amanda J Page
- Centre for Nutrition and Gastrointestinal Disease, Adelaide Medical School, University of Adelaide, Adelaide, South Australia, Australia
- Nutrition and Metabolism, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
| | - George Hatzinikolas
- Centre for Nutrition and Gastrointestinal Disease, Adelaide Medical School, University of Adelaide, Adelaide, South Australia, Australia
- Nutrition and Metabolism, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
| | - Miaoxin Chen
- Centre for Nutrition and Gastrointestinal Disease, Adelaide Medical School, University of Adelaide, Adelaide, South Australia, Australia
- Nutrition and Metabolism, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
- Centre for Reproductive Medicine, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
| | - Gary A Wittert
- Centre for Nutrition and Gastrointestinal Disease, Adelaide Medical School, University of Adelaide, Adelaide, South Australia, Australia
- Nutrition and Metabolism, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
| | - Leonie K Heilbronn
- Centre for Nutrition and Gastrointestinal Disease, Adelaide Medical School, University of Adelaide, Adelaide, South Australia, Australia
- Nutrition and Metabolism, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
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30
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Memetimin H, Li D, Tan K, Zhou C, Liang Y, Wu Y, Wang S. Myeloid-specific deletion of thrombospondin 1 protects against inflammation and insulin resistance in long-term diet-induced obese male mice. Am J Physiol Endocrinol Metab 2018; 315:E1194-E1203. [PMID: 30351986 PMCID: PMC6336956 DOI: 10.1152/ajpendo.00273.2018] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 10/17/2018] [Accepted: 10/17/2018] [Indexed: 12/17/2022]
Abstract
Thrombospondin 1 (TSP1) is a multifunctional matricellular protein. Recent studies demonstrate that TSP1 is highly expressed in adipose tissue (AT) and positively associated with AT inflammation and insulin resistance (IR). In this study, the contribution of different cellular sources of TSP1 to obesity-induced metabolic complications is determined by using mice with either adipocyte or myeloid/macrophage-specific deletion of TSP1 in a diet-induced obese model. The results demonstrated that neither adipocyte nor myeloid/macrophage-specific deletion of TSP1 affected the development of long-term high-fat diet-induced obesity. Adipocyte-specific deletion of TSP1 did not protect mice from obesity-induced inflammation and IR. On the contrary, obese mice with myeloid/macrophage loss of TSP1 had reduced macrophage accumulation in AT, which was accompanied with reduced inflammation and improved glucose tolerance and insulin sensitivity compared with obese control mice. Reduced macrophage-derived-TGF-β1 signaling and adipose tissue fibrosis were also observed in long-term high-fat-fed mice with myeloid/macrophage-specific TSP1 deletion. Moreover, in vitro experiments demonstrated an autocrine effect of TSP1-mediated TGF-β activation in macrophages in obesity. Collectively this study highlights the critical contribution of myeloid/macrophage-derived TSP1 to obesity-associated chronic inflammation and IR, which may serve as a new therapeutic target for metabolic disease.
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Affiliation(s)
- Hasiyet Memetimin
- Department of Pharmacology and Nutritional Sciences, University of Kentucky , Lexington, Kentucky
| | - Dong Li
- Department of Pharmacology and Nutritional Sciences, University of Kentucky , Lexington, Kentucky
| | - Kaiyuan Tan
- Department of Pharmacology and Nutritional Sciences, University of Kentucky , Lexington, Kentucky
| | - Changcheng Zhou
- Department of Pharmacology and Nutritional Sciences, University of Kentucky , Lexington, Kentucky
| | - Ying Liang
- Department of Toxicology and Cancer Biology, University of Kentucky , Lexington, Kentucky
| | - Yadi Wu
- Department of Pharmacology and Nutritional Sciences, University of Kentucky , Lexington, Kentucky
| | - Shuxia Wang
- Department of Pharmacology and Nutritional Sciences, University of Kentucky , Lexington, Kentucky
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IL-1β- and IL-4-polarized macrophages have opposite effects on adipogenesis of intramuscular fibro-adipogenic progenitors in humans. Sci Rep 2018; 8:17005. [PMID: 30451963 PMCID: PMC6242986 DOI: 10.1038/s41598-018-35429-w] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 11/05/2018] [Indexed: 12/22/2022] Open
Abstract
Intramuscular fat deposition represents a negative prognostic factor for several myopathies, metabolic diseases and aging. Fibro-adipogenic progenitors (FAPs) are considered as the main source of intramuscular adipocytes, but the mechanisms controlling their adipogenic potential are still not elucidated in humans. The aim of this study was to explore the regulation of human FAP adipogenesis by macrophages. We found that CD140a-expressing FAPs were located close to CD68 positive macrophages in muscles from patients with Duchenne muscular dystrophy (DMD). This strongly suggests a potential interaction between FAPs and macrophages in vivo. Isolated human primary FAPs were then differentiated in the presence of conditioned media obtained from primary blood monocyte-polarized macrophages. Molecules released by IL-1β-polarized macrophages (M(IL-1β)) drastically reduced FAP adipogenic potential as assessed by decreased cellular lipid accumulation and reduced gene expression of adipogenic markers. This was associated with an increased gene expression of pro-inflammatory cytokines in FAPs. Conversely, factors secreted by IL-4-polarized macrophages (M(IL-4)) enhanced FAP adipogenesis. Finally, the inhibition of FAP adipocyte differentiation by M(IL-1β) macrophages requires the stimulation of Smad2 phosphorylation of FAPs. Our findings identify a novel potential crosstalk between FAPs and M(IL-1β) and M(IL-4) macrophages in the development of adipocyte accumulation in human skeletal muscles.
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32
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Lee MJ. Transforming growth factor beta superfamily regulation of adipose tissue biology in obesity. Biochim Biophys Acta Mol Basis Dis 2018; 1864:1160-1171. [PMID: 29409985 DOI: 10.1016/j.bbadis.2018.01.025] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 01/09/2018] [Accepted: 01/29/2018] [Indexed: 12/12/2022]
Abstract
Accumulation of dysfunctional white adipose tissues increases risks for cardiometabolic diseases in obesity. In addition to white, brown or brite adipose tissues are also present in adult humans and increasing their amount may be protective. Therefore, understanding factors regulating the amount and function of each adipose depot is crucial for developing therapeutic targets for obesity and its associated metabolic diseases. The transforming growth factor beta (TGFβ) superfamily, which consists of TGFβ, BMPs, GDFs, and activins, controls multiple aspects of adipose biology. This review focuses on the recent development in understanding the role of TGFβ superfamily in the regulation of white, brite and brown adipocyte differentiation, adipose tissue fibrosis, and adipocyte metabolic and endocrine functions. TGFβ family and their antagonists are produced locally within adipose tissues and their expression levels are altered in obesity. We also discuss their potential contribution to adipose tissue dysfunction in obesity.
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Affiliation(s)
- Mi-Jeong Lee
- Diabetes Obesity and Metabolism Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave Levy Place, Box 1152, New York, NY 10029, USA.
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Jager M, Lee MJ, Li C, Farmer SR, Fried SK, Layne MD. Aortic carboxypeptidase-like protein enhances adipose tissue stromal progenitor differentiation into myofibroblasts and is upregulated in fibrotic white adipose tissue. PLoS One 2018; 13:e0197777. [PMID: 29799877 PMCID: PMC5969754 DOI: 10.1371/journal.pone.0197777] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 05/08/2018] [Indexed: 02/06/2023] Open
Abstract
White adipose tissue expands through both adipocyte hypertrophy and hyperplasia and it is hypothesized that fibrosis or excess accumulation of extracellular matrix within adipose tissue may limit tissue expansion contributing to metabolic dysfunction. The pathways that control adipose tissue remodeling are only partially understood, however it is likely that adipose tissue stromal and perivascular progenitors participate in fibrotic remodeling and also serve as adipocyte progenitors. The goal of this study was to investigate the role of the secreted extracellular matrix protein aortic carboxypeptidase-like protein (ACLP) on adipose progenitor differentiation in the context of adipose tissue fibrosis. Treatment of 10T1/2 mouse cells with recombinant ACLP suppressed adipogenesis and enhanced myofibroblast differentiation, which was dependent on transforming growth factor-β receptor kinase activity. Mice fed a chronic high fat diet exhibited white adipose tissue fibrosis with elevated ACLP expression and cellular fractionation of these depots revealed that ACLP was co-expressed with collagens primarily in the inflammatory cell depleted stromal-vascular fraction (SVF). SVF cells isolated from mice fed a high fat diet secreted increased amounts of ACLP compared to low fat diet control SVF. These cells also exhibited reduced adipogenic differentiation capacity in vitro. Importantly, differentiation studies in primary human adipose stromal cells revealed that mature adipocytes do not express ACLP and exogenous ACLP administration blunted their differentiation potential while upregulating myofibroblastic markers. Collectively, these studies identify ACLP as a stromal derived mediator of adipose progenitor differentiation that may limit adipocyte expansion during white adipose tissue fibrosis.
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Affiliation(s)
- Mike Jager
- Department of Biochemistry, Boston University School of Medicine, Boston, Massachusetts, United States of America
| | - Mi-Jeong Lee
- Section of Endocrinology, Diabetes, and Nutrition, Department of Medicine, Boston University School of Medicine, Boston, Massachusetts, United States of America
| | - Chendi Li
- Department of Biochemistry, Boston University School of Medicine, Boston, Massachusetts, United States of America
| | - Stephen R. Farmer
- Department of Biochemistry, Boston University School of Medicine, Boston, Massachusetts, United States of America
| | - Susan K. Fried
- Section of Endocrinology, Diabetes, and Nutrition, Department of Medicine, Boston University School of Medicine, Boston, Massachusetts, United States of America
| | - Matthew D. Layne
- Department of Biochemistry, Boston University School of Medicine, Boston, Massachusetts, United States of America
- * E-mail:
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Abstract
Obesity can be defined as the adaptive response of organism facing chronic nutrient overflow. In this context, the adipose tissue (AT) can expand, through increased adipocyte size and number, to function as the main energy-storing organ. However, over the course of obesity progression, the AT undergo continual remodeling, evolving into pathological alterations. It is now clear that pro-inflammatory cell accumulation favors local AT injury. More recently, we and others described excess levels of extracellular matrix (ECM) and fibrosis in AT depots from obese individuals. In obese mice, targeting ECM-remodeling improves glucose tolerance and insulin sensitivity. Therefore AT fibrosis represents a maladaptive mechanism contributing to obesity-related metabolic complications such as diabetes, cardiometabolic and liver diseases. Here, we review the current knowledge about obesity-induced adipose tissue remodeling and its local and systemic consequences.
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Affiliation(s)
- Geneviève Marcelin
- Inserm, UMRS 1166 équipe 6 NutriOmique, Sorbonne Université, institut de cardio-métabolisme et nutrition (ICAN), Hôpital Pitié-Salpêtrière, 91, boulevard de l'Hôpital, F-75013 Paris, France
| | - Karine Clément
- Inserm, UMRS 1166 équipe 6 NutriOmique, Sorbonne Université, institut de cardio-métabolisme et nutrition (ICAN), Hôpital Pitié-Salpêtrière, 91, boulevard de l'Hôpital, F-75013 Paris, France - Assistance Publique Hôpitaux de Paris, AP-HP, Hôpital Pitié-Salpêtrière, service de Nutrition, 91, boulevard de l'Hôpital, F-75013 Paris, France
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Lake JE. The Fat of the Matter: Obesity and Visceral Adiposity in Treated HIV Infection. Curr HIV/AIDS Rep 2018; 14:211-219. [PMID: 29043609 DOI: 10.1007/s11904-017-0368-6] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE OF REVIEW The aim of this review is to summarize knowledge of the prevalence, relevant physiology, and consequences of obesity and visceral adiposity in HIV-infected adults, including highlighting gaps in current knowledge and future research directions. RECENT FINDINGS Similar to the general population, obesity prevalence is increasing among HIV-infected persons, and obesity and visceral adiposity are associated with numerous metabolic and inflammatory sequelae. However, HIV- and antiretroviral therapy (ART)-specific factors may contribute to fat gain and fat quality in treated HIV infection, particularly to the development of visceral adiposity, and sex differences may exist. Obesity and visceral adiposity commonly occur in HIV-infected persons and have significant implications for morbidity and mortality. Future research should aim to better elucidate the HIV- and ART-specific contributors to obesity and visceral adiposity in treated HIV infection, with the goal of developing targeted therapies for the prevention and treatment of obesity and visceral adiposity in the modern ART era.
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Affiliation(s)
- Jordan E Lake
- University of Texas Health Science Center at Houston, 6431 Fannin St., MSB 2.112, Houston, TX, 77030, USA.
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Song B, Zhang H, Zhang S. Toll‑like receptor 2 mediates deposition of collagen I in adipose tissue of high fat diet‑induced obese mice. Mol Med Rep 2018; 17:5958-5963. [PMID: 29436650 DOI: 10.3892/mmr.2018.8590] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Accepted: 11/23/2017] [Indexed: 11/06/2022] Open
Abstract
Obesity is marked by deposition of collagen I in adipose tissue. Toll like receptor (TLR)2 is involved in lipid metabolism, however the association between TLR2 and collagen I remains unclear. The present study was designed to investigate the effect of TLR2 knockout on collagen I in adipose tissue in obese mice. TLR2 knockout and C57BL/6J mice (aged 4 weeks) were fed normal chow or a high‑fat‑diet for 16 weeks. Compared with adipose tissue from lean controls, that from C57BL/6J mice fed a high‑fat diet had increased levels of collagen I, TIMP1 and TGFβ1 and lower levels of MMP1. However, adipose tissue from TLR2 knockout mice fed a high‑fat diet revealed decreased levels of collagen I, TIMP metallopeptidase inhibitor (TIMP)1, and transforming growth factor (TGF)β1, in addition to increased levels of matrix metallopeptidase (MMP)1. These findings suggest that, in the adipose tissue of obese mice, TLR2 is involved in the metabolism of collagen I and may exhibit a role in the metabolism of MMP1, TIMP1 and TGFβ1.
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Affiliation(s)
- Bing Song
- Endocrinology Department, First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning 121000, P.R. China
| | - Haoqiang Zhang
- Endocrinology Department, First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning 121000, P.R. China
| | - Suping Zhang
- Endocrinology Department, First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning 121000, P.R. China
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Pedro MN, Rocha GZ, Guadagnini D, Santos A, Magro DO, Assalin HB, Oliveira AG, Pedro RDJ, Saad MJA. Insulin Resistance in HIV-Patients: Causes and Consequences. Front Endocrinol (Lausanne) 2018; 9:514. [PMID: 30233499 PMCID: PMC6133958 DOI: 10.3389/fendo.2018.00514] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 08/16/2018] [Indexed: 12/14/2022] Open
Abstract
Here we review how immune activation and insulin resistance contribute to the metabolic alterations observed in HIV-infected patients, and how these alterations increase the risk of developing CVD. The introduction and evolution of antiretroviral drugs over the past 25 years has completely changed the clinical prognosis of HIV-infected patients. The deaths of these individuals are now related to atherosclerotic CVDs, rather than from the viral infection itself. However, HIV infection, cART, and intestinal microbiota are associated with immune activation and insulin resistance, which can lead to the development of a variety of diseases and disorders, especially with regards to CVDs. The increase in LPS and proinflammatory cytokines circulating levels and intracellular mechanisms activate serine kinases, resulting in insulin receptor substrate-1 (IRS-1) serine phosphorylation and consequently a down regulation in insulin signaling. While lifestyle modifications and pharmaceutical interventions can be employed to treat these altered metabolic functions, the mechanisms involved in the development of these chronic complications remain largely unresolved. The elucidation and understanding of these mechanisms will give rise to new classes of drugs that will further improve the quality of life of HIV-infected patients, over the age of 50.
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Affiliation(s)
- Marcelo N. Pedro
- Department of Internal Medicine, Faculty of Medical Sciences, State University of Campinas-UNICAMP, Campinas, Brazil
| | - Guilherme Z. Rocha
- Department of Internal Medicine, Faculty of Medical Sciences, State University of Campinas-UNICAMP, Campinas, Brazil
| | - Dioze Guadagnini
- Department of Internal Medicine, Faculty of Medical Sciences, State University of Campinas-UNICAMP, Campinas, Brazil
| | - Andrey Santos
- Department of Internal Medicine, Faculty of Medical Sciences, State University of Campinas-UNICAMP, Campinas, Brazil
| | - Daniela O. Magro
- Department of Surgery, Faculty of Medical Sciences, State University of Campinas-UNICAMP, Campinas, Brazil
| | - Heloisa B. Assalin
- Department of Internal Medicine, Faculty of Medical Sciences, State University of Campinas-UNICAMP, Campinas, Brazil
| | - Alexandre G. Oliveira
- Department of Internal Medicine, Faculty of Medical Sciences, State University of Campinas-UNICAMP, Campinas, Brazil
- Biosciences Institute, São Paulo State University (UNESP), Rio Claro, Brazil
| | - Rogerio de Jesus Pedro
- Department of Internal Medicine, Faculty of Medical Sciences, State University of Campinas-UNICAMP, Campinas, Brazil
| | - Mario J. A. Saad
- Department of Internal Medicine, Faculty of Medical Sciences, State University of Campinas-UNICAMP, Campinas, Brazil
- *Correspondence: Mario J. A. Saad
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38
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Kumari M, Heeren J, Scheja L. Regulation of immunometabolism in adipose tissue. Semin Immunopathol 2017; 40:189-202. [DOI: 10.1007/s00281-017-0668-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 11/22/2017] [Indexed: 12/14/2022]
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39
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The primary cilium is necessary for the differentiation and the maintenance of human adipose progenitors into myofibroblasts. Sci Rep 2017; 7:15248. [PMID: 29127365 PMCID: PMC5681559 DOI: 10.1038/s41598-017-15649-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 10/31/2017] [Indexed: 02/06/2023] Open
Abstract
The primary cilium is an organelle, present at the cell surface, with various biological functions. We, and others, have shown that it plays a role in the differentiation of adipose progenitors (APs) into adipocytes. APs can also differentiate into myofibroblasts when treated with TGF-β1. Several components of the TGF-β1 pathway are located within the cilium suggesting a function for this organelle in AP myofibrogenesis. We studied differentiation of APs into myofibroblasts in two human models: APs of the adipose tissue (aAPs) and APs resident in the skeletal muscles (mAPs). We showed that, in vivo, myofibroblasts within muscles of patients with Duchenne Muscular Dystrophy were ciliated. In vitro, myofibroblasts derived from APs maintained a functional primary cilium. Using HPI4, a small molecule that inhibits ciliogenesis, and siRNA against Kif-3A, we provide evidence that the primary cilium is necessary both for the differentiation of APs into myofibroblasts and the maintenance of the phenotype. Disruption of the primary cilium inhibited TGF-β1-signalisation providing a molecular mechanism by which the cilium controls myofibroblast differentiation. These data suggest that myofibroblasts from various origins are controlled differently by their primary cilium.
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Abstract
Interactions between macrophages and adipocytes influence both metabolism and inflammation. Obesity-induced changes to macrophages and adipocytes lead to chronic inflammation and insulin resistance. This paper reviews the various functions of macrophages in lean and obese adipose tissue and how obesity alters adipose tissue macrophage phenotypes. Metabolic disease and insulin resistance shift the balance between numerous pro- and anti-inflammatory regulators of macrophages and create a feed-forward loop of increasing inflammatory macrophage activation and worsening adipocyte dysfunction. This ultimately leads to adipose tissue fibrosis and diabetes. The molecular mechanisms underlying these processes have therapeutic implications for obesity, metabolic syndrome, and diabetes.
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Affiliation(s)
- Dylan Thomas
- Section of Endocrinology, Diabetes, Nutrition and Weight Management, Boston Medical Center, 88 East Newton Street, H-3600, Boston, MA 02118.
| | - Caroline Apovian
- Section of Endocrinology, Diabetes, Nutrition and Weight Management, Boston Medical Center, 88 East Newton Street, Robinson 4400, Boston, MA 02118.
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41
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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.
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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
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42
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Chignon-Sicard B, Kouidhi M, Yao X, Delerue-Audegond A, Villageois P, Peraldi P, Ferrari P, Rival Y, Piwnica D, Aubert J, Dani C. Platelet-rich plasma respectively reduces and promotes adipogenic and myofibroblastic differentiation of human adipose-derived stromal cells via the TGFβ signalling pathway. Sci Rep 2017; 7:2954. [PMID: 28592806 PMCID: PMC5462784 DOI: 10.1038/s41598-017-03113-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 04/24/2017] [Indexed: 11/09/2022] Open
Abstract
Autologous fat grafting is a gold standard therapy for soft tissue defects, but is hampered by unpredictable postoperative outcomes. Fat graft enrichment with adipose-derived stromal cell (ASCs) was recently reported to enhance graft survival. Platelet-rich plasma (PRP) has also emerged as a biologic scaffold that promotes fat graft viability. Combined ASC/PRP fat grafting enrichment is thus a promising new regenerative medicine approach. The effects of PRP on ASC proliferation are well documented, but the impact of PRP on ASC differentiation has yet to be investigated in depth to further elucidate the PRP clinical effects. Here we analyzed the human ASC fate upon PRP treatment. PRP was found to sharply reduce the potential of ASCs to undergo differentiation into adipocytes. Interestingly, the PRP anti-adipogenic effect was accompanied by the generation of myofibroblast-like cells. Among the various factors released from PRP, TGFβ pathway activators played a critical role in both the anti-adipogenic and pro-myofibroblastic PRP effects. Overall, these data suggest that PRP participates in maintaining a pool of ASCs and in the repair process by promoting ASC differentiation into myofibroblast-like cells. TGFβ may provide an important target pathway to improve PRP clinical outcomes.
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Affiliation(s)
- Bérengère Chignon-Sicard
- Université Côte d'Azur, CNRS, Inserm, iBV, Faculté de Médecine, 06107, Nice Cedex 2, France.,Plastic, Reconstructive and Hand Surgery Department, Hôpital Pasteur 2, Nice, France
| | - Magali Kouidhi
- Université Côte d'Azur, CNRS, Inserm, iBV, Faculté de Médecine, 06107, Nice Cedex 2, France
| | - Xi Yao
- Université Côte d'Azur, CNRS, Inserm, iBV, Faculté de Médecine, 06107, Nice Cedex 2, France
| | | | - Phi Villageois
- Université Côte d'Azur, CNRS, Inserm, iBV, Faculté de Médecine, 06107, Nice Cedex 2, France
| | - Pascal Peraldi
- Université Côte d'Azur, CNRS, Inserm, iBV, Faculté de Médecine, 06107, Nice Cedex 2, France
| | | | - Yves Rival
- Research Galderma, Sophia, Antipolis, France
| | | | | | - Christian Dani
- Université Côte d'Azur, CNRS, Inserm, iBV, Faculté de Médecine, 06107, Nice Cedex 2, France.
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43
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Immune cell-derived cytokines contribute to obesity-related inflammation, fibrogenesis and metabolic deregulation in human adipose tissue. Sci Rep 2017; 7:3000. [PMID: 28592801 PMCID: PMC5462798 DOI: 10.1038/s41598-017-02660-w] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 04/18/2017] [Indexed: 12/03/2022] Open
Abstract
Adipose tissue contains a variety of immune cells, which vary in abundance and phenotype with obesity. The contribution of immune cell-derived factors to inflammatory, fibrotic and metabolic alterations in adipose tissue is not well established in human obesity. Human primary adipose tissue cells, including pre-adipocytes, endothelial cells and mature adipocytes, were used to investigate deregulation of cell- and pathway-specific gene profiles. Among factors known to alter adipose tissue biology, we focus on inflammatory (IL-1β and IL-17) and pro-fibrotic (TGF-β1) factors. rIL-1β and rIL-17 induced concordant pro-inflammatory transcriptional programs in pre-adipocytes and endothelial cells, with a markedly more potent effect of IL-1β than IL-17. None of these cytokines had significant effect on fibrogenesis-related gene expression, contrasting with rTGF-β1-induced up-regulation of extracellular matrix components and pro-fibrotic factors. In mature adipocytes, all three factors promoted down-regulation of genes functionally involved in lipid storage and release. IL-1β and IL-17 impacted adipocyte metabolic genes in relation with their respective pro-inflammatory capacity, while the effect of TGF-β1 occurred in face of an anti-inflammatory signature. These data revealed that IL-1β and IL-17 had virtually no effect on pro-fibrotic alterations but promote inflammation and metabolic dysfunction in human adipose tissue, with a prominent role for IL-1β.
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44
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GLP-1 analogue-induced weight loss does not improve obesity-induced AT dysfunction. Clin Sci (Lond) 2017; 131:343-353. [DOI: 10.1042/cs20160803] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 12/20/2016] [Accepted: 12/22/2016] [Indexed: 12/21/2022]
Abstract
Liraglutide shows limited impact on adipose tissue (AT) independent of the associated weight loss. However, despite weight loss and better glycaemic control than with diet alone, Liraglutide increases inflammation and creates a pro-fibrotic environment in subcutaneous AT (SCAT).
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45
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Erlandson KM, Lake JE. Fat Matters: Understanding the Role of Adipose Tissue in Health in HIV Infection. Curr HIV/AIDS Rep 2016; 13:20-30. [PMID: 26830284 DOI: 10.1007/s11904-016-0298-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
More than one-third of adults in the USA are obese and obesity-related disease accounts for some of the leading causes of preventable death. Mid-life obesity may be a strong predictor of physical function impairment later in life regardless of body mass index (BMI) in older age, highlighting the benefits of obesity prevention on health throughout the lifespan. Adipose tissue disturbances including lipodystrophy and obesity are prevalent in the setting of treated and untreated HIV infection. This article will review current knowledge on fat disturbances in HIV-infected persons, including therapeutic options and future directions.
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Affiliation(s)
- Kristine M Erlandson
- University of Colorado-Anschutz Medical Center, 12700 E 19th Ave, Mailstop B168, Aurora, CO, USA.
| | - Jordan E Lake
- University of California, Los Angeles, 11075 Santa Monica Blvd., Ste. 100, Los Angeles, CA, USA.
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46
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Characterization of TGF-β expression and signaling profile in the adipose tissue of rats fed with high-fat and energy-restricted diets. J Nutr Biochem 2016; 38:107-115. [DOI: 10.1016/j.jnutbio.2016.07.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 06/29/2016] [Accepted: 07/28/2016] [Indexed: 11/22/2022]
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47
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Dhasarathy A, Roemmich JN, Claycombe KJ. Influence of maternal obesity, diet and exercise on epigenetic regulation of adipocytes. Mol Aspects Med 2016; 54:37-49. [PMID: 27825817 DOI: 10.1016/j.mam.2016.10.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 10/25/2016] [Accepted: 10/25/2016] [Indexed: 12/11/2022]
Affiliation(s)
- Archana Dhasarathy
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND 58202, USA
| | - James N Roemmich
- USDA-ARS-PA, Grand Forks Human Nutrition Research Center, 2420 2nd Avenue North, Grand Forks, ND 58203, USA
| | - Kate J Claycombe
- USDA-ARS-PA, Grand Forks Human Nutrition Research Center, 2420 2nd Avenue North, Grand Forks, ND 58203, USA.
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48
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Abstract
Adipose tissue not only functions as the major energy-storing tissue, but also functions as an endocrine organ that regulates systemic metabolism by releasing various hormones called adipokines. Macrophages play a critical role in maintaining adipocyte health in a lean state and in remodeling during the progression of obesity. Large numbers of classically activated (M1) macrophages accumulate in adipose tissue as adipocytes become larger because of excessive energy conditions, and they adversely affect insulin resistance by triggering local and systemic inflammation. In contrast, alternatively activated (M2) macrophages seem to maintain the health of adipose tissues in a lean state. In addition, they play a role in adapting to excess energy states, because M2 macrophage dysfunction caused by genetic disruption of the M2 gene results in metabolic disorders under high-fat-fed conditions that are probably attributable to their anti-inflammatory functions. Nonetheless, how M2 macrophages contribute to maintaining the health of adipose tissue and therefore to insulin sensitivity is largely unknown. In this article, we review the literature on the role of M1 and M2 macrophages in metabolism, with a special focus on the role of M2 macrophages in adipose tissue. Likewise, we raise topics of M2 macrophages in non-adipose tissues to expand our understanding of macrophage heterogeneity.
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49
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Hafner AL, Contet J, Ravaud C, Yao X, Villageois P, Suknuntha K, Annab K, Peraldi P, Binetruy B, Slukvin II, Ladoux A, Dani C. Brown-like adipose progenitors derived from human induced pluripotent stem cells: Identification of critical pathways governing their adipogenic capacity. Sci Rep 2016; 6:32490. [PMID: 27577850 PMCID: PMC5006163 DOI: 10.1038/srep32490] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 08/08/2016] [Indexed: 12/19/2022] Open
Abstract
Human induced pluripotent stem cells (hiPSCs) show great promise for obesity treatment as they represent an unlimited source of brown/brite adipose progenitors (BAPs). However, hiPSC-BAPs display a low adipogenic capacity compared to adult-BAPs when maintained in a traditional adipogenic cocktail. The reasons of this feature are unknown and hamper their use both in cell-based therapy and basic research. Here we show that treatment with TGFβ pathway inhibitor SB431542 together with ascorbic acid and EGF were required to promote hiPSCs-BAP differentiation at a level similar to adult-BAP differentiation. hiPSC-BAPs expressed the molecular identity of adult-UCP1 expressing cells (PAX3, CIDEA, DIO2) with both brown (ZIC1) and brite (CD137) adipocyte markers. Altogether, these data highlighted the critical role of TGFβ pathway in switching off hiPSC-brown adipogenesis and revealed novel factors to unlock their differentiation. As hiPSC-BAPs display similarities with adult-BAPs, it opens new opportunities to develop alternative strategies to counteract obesity.
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Affiliation(s)
| | - Julian Contet
- Université Côte d’Azur, CNRS, Inserm, iBV, Nice, France
| | | | - Xi Yao
- Université Côte d’Azur, CNRS, Inserm, iBV, Nice, France
| | | | - Kran Suknuntha
- Department of Pathology and Laboratory Medicine, University of Wisconsin, Madison, WI 53715, USA
| | - Karima Annab
- Inserm U910, Faculty of Medicine La Timone, Marseille, France
| | | | | | - Igor I. Slukvin
- Department of Pathology and Laboratory Medicine, University of Wisconsin, Madison, WI 53715, USA
| | - Annie Ladoux
- Université Côte d’Azur, CNRS, Inserm, iBV, Nice, France
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50
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Muir LA, Neeley CK, Meyer KA, Baker NA, Brosius AM, Washabaugh AR, Varban OA, Finks JF, Zamarron BF, Flesher CG, Chang JS, DelProposto JB, Geletka L, Martinez-Santibanez G, Kaciroti N, Lumeng CN, O'Rourke RW. Adipose tissue fibrosis, hypertrophy, and hyperplasia: Correlations with diabetes in human obesity. Obesity (Silver Spring) 2016; 24:597-605. [PMID: 26916240 PMCID: PMC4920141 DOI: 10.1002/oby.21377] [Citation(s) in RCA: 217] [Impact Index Per Article: 27.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Revised: 09/19/2015] [Accepted: 09/26/2015] [Indexed: 12/16/2022]
Abstract
OBJECTIVE The relationship between adipose tissue fibrosis, adipocyte hypertrophy, and preadipocyte hyperplasia in the context of obesity and the correlation of these tissue-based phenomena with systemic metabolic disease are poorly defined. The goal of this study was to clarify the relationship between adipose tissue fibrosis, adipocyte hypertrophy, and preadipocyte hyperplasia in human obesity and determine the correlation of these adipose-tissue based phenomena with diabetes. METHODS Visceral and subcutaneous adipose tissues from humans with obesity collected during bariatric surgery were studied with QRTPCR, immunohistochemistry, and flow cytometry for expression of collagens and fibrosis-related proteins, adipocyte size, and preadipocyte frequency. Results were correlated with clinical characteristics including diabetes status. RESULTS Fibrosis was decreased, hypertrophy was increased, and preadipocyte frequency and fibrotic gene expression were decreased in adipose tissues from diabetic subjects compared to non-diabetic subjects. These differences were greater in visceral compared to subcutaneous adipose tissue. CONCLUSIONS These data are consistent with the hypothesis that adipose tissue fibrosis in the context of human obesity limits adipocyte hypertrophy and is associated with a reciprocal increase in adipocyte hyperplasia, with beneficial effects on systemic metabolism. These findings suggest adipose tissue fibrosis as a potential target for manipulation of adipocyte metabolism.
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Affiliation(s)
- Lindsey A. Muir
- Department of Pediatrics and Communicable Diseases, University of Michigan Medical School, Ann Arbor, MI, USA
| | | | - Kevin A. Meyer
- Department of Surgery, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Nicki A. Baker
- Department of Surgery, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Alice M. Brosius
- Department of Pediatrics and Communicable Diseases, University of Michigan Medical School, Ann Arbor, MI, USA
- Department of Surgery, University of Michigan Medical School, Ann Arbor, MI, USA
| | | | - Oliver A. Varban
- Department of Surgery, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Jonathan F. Finks
- Department of Surgery, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Brian F. Zamarron
- Department of Pediatrics and Communicable Diseases, University of Michigan Medical School, Ann Arbor, MI, USA
- Graduate Program in Immunology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Carmen G. Flesher
- Undergraduate Research Opportunity Program, University of Michigan, Ann Arbor, MI, USA
| | - Joshua S. Chang
- Undergraduate Research Opportunity Program, University of Michigan, Ann Arbor, MI, USA
| | - Jennifer B. DelProposto
- Department of Pediatrics and Communicable Diseases, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Lynn Geletka
- Department of Pediatrics and Communicable Diseases, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Gabriel Martinez-Santibanez
- Department of Pediatrics and Communicable Diseases, University of Michigan Medical School, Ann Arbor, MI, USA
- Graduate Program in Cellular and Molecular Biology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Niko Kaciroti
- Center for Human Growth and Development, University of Michigan, Ann Arbor, MI, USA
- Department of Biostatistics, University of Michigan School of Public Health, Ann Arbor, MI, USA
| | - Carey N. Lumeng
- Department of Pediatrics and Communicable Diseases, University of Michigan Medical School, Ann Arbor, MI, USA
- Graduate Program in Immunology, University of Michigan Medical School, Ann Arbor, MI, USA
- Graduate Program in Cellular and Molecular Biology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Robert W. O'Rourke
- Department of Surgery, University of Michigan Medical School, Ann Arbor, MI, USA
- Department of Surgery, Ann Arbor Veteran's Administration Hospital, Ann Arbor, MI, USA
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