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Mathieu M, Girousse A, Sengenès C. [What if the origin of FAPs was contributing to their heterogeneity in muscle?]. Med Sci (Paris) 2023; 39 Hors série n° 1:15-21. [PMID: 37975765 DOI: 10.1051/medsci/2023129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023] Open
Abstract
Fibro-adipogenic progenitors (FAPs) are resident mesenchymal stromal cells (MSCs) of skeletal muscle. They play a crucial role in muscle homeostasis and regeneration through their paracrine activity. Recent technological advances in single-cell RNA sequencing have allowed the characterization of the heterogeneity within this cell population. In this article, we will present the different subpopulations of FAPs under basal, injury, or degenerative conditions, as well as their associated functions in mice and humans. We will then discuss the potential extramuscular origin of a post-injury FAP population. Indeed, our recent work demonstrates that MSCs from adipose tissue, infiltrating the muscle, could contribute to FAP heterogeneity.
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Affiliation(s)
- Maxime Mathieu
- Institut RESTORE, UMR Inserm 1301 / CNRS 5070, Toulouse, France
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2
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Sastourné-Arrey Q, Mathieu M, Contreras X, Monferran S, Bourlier V, Gil-Ortega M, Murphy E, Laurens C, Varin A, Guissard C, Barreau C, André M, Juin N, Marquès M, Chaput B, Moro C, O'Gorman D, Casteilla L, Girousse A, Sengenès C. Adipose tissue is a source of regenerative cells that augment the repair of skeletal muscle after injury. Nat Commun 2023; 14:80. [PMID: 36604419 PMCID: PMC9816314 DOI: 10.1038/s41467-022-35524-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 12/08/2022] [Indexed: 01/07/2023] Open
Abstract
Fibro-adipogenic progenitors (FAPs) play a crucial role in skeletal muscle regeneration, as they generate a favorable niche that allows satellite cells to perform efficient muscle regeneration. After muscle injury, FAP content increases rapidly within the injured muscle, the origin of which has been attributed to their proliferation within the muscle itself. However, recent single-cell RNAseq approaches have revealed phenotype and functional heterogeneity in FAPs, raising the question of how this differentiation of regenerative subtypes occurs. Here we report that FAP-like cells residing in subcutaneous adipose tissue (ScAT), the adipose stromal cells (ASCs), are rapidly released from ScAT in response to muscle injury. Additionally, we find that released ASCs infiltrate the damaged muscle, via a platelet-dependent mechanism and thus contribute to the FAP heterogeneity. Moreover, we show that either blocking ASCs infiltration or removing ASCs tissue source impair muscle regeneration. Collectively, our data reveal that ScAT is an unsuspected physiological reservoir of regenerative cells that support skeletal muscle regeneration, underlining a beneficial relationship between muscle and fat.
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Affiliation(s)
- Quentin Sastourné-Arrey
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Maxime Mathieu
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Xavier Contreras
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Sylvie Monferran
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Virginie Bourlier
- Institute of Metabolic and Cardiovascular Diseases, INSERM /Paul Sabatier University UMR 1297, Team MetaDiab, Toulouse, France
| | - Marta Gil-Ortega
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Enda Murphy
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | - Claire Laurens
- Institute of Metabolic and Cardiovascular Diseases, INSERM /Paul Sabatier University UMR 1297, Team MetaDiab, Toulouse, France
| | - Audrey Varin
- RESTORE, Research Center, Team 2 FLAMES, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Christophe Guissard
- RESTORE, Research Center, Team 4 GOT-IT, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Corinne Barreau
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Mireille André
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Noémie Juin
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Marie Marquès
- Institute of Metabolic and Cardiovascular Diseases, INSERM /Paul Sabatier University UMR 1297, Team MetaDiab, Toulouse, France
| | - Benoit Chaput
- Department of Plastic and Reconstructive Surgery, Toulouse University Hospital, 31100, Toulouse, France
| | - Cédric Moro
- Institute of Metabolic and Cardiovascular Diseases, INSERM /Paul Sabatier University UMR 1297, Team MetaDiab, Toulouse, France
| | - Donal O'Gorman
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | - Louis Casteilla
- RESTORE, Research Center, Team 4 GOT-IT, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Amandine Girousse
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Coralie Sengenès
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France.
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Girousse A, Mathieu M, Sastourné-Arrey Q, Monferran S, Casteilla L, Sengenès C. Endogenous Mobilization of Mesenchymal Stromal Cells: A Pathway for Interorgan Communication? Front Cell Dev Biol 2021; 8:598520. [PMID: 33490065 PMCID: PMC7820193 DOI: 10.3389/fcell.2020.598520] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 11/18/2020] [Indexed: 12/16/2022] Open
Abstract
To coordinate specialized organs, inter-tissue communication appeared during evolution. Consequently, individual organs communicate their states via a vast interorgan communication network (ICN) made up of peptides, proteins, and metabolites that act between organs to coordinate cellular processes under homeostasis and stress. However, the nature of the interorgan signaling could be even more complex and involve mobilization mechanisms of unconventional cells that are still poorly described. Mesenchymal stem/stromal cells (MSCs) virtually reside in all tissues, though the biggest reservoir discovered so far is adipose tissue where they are named adipose stromal cells (ASCs). MSCs are thought to participate in tissue maintenance and repair since the administration of exogenous MSCs is well known to exert beneficial effects under several pathological conditions. However, the role of endogenous MSCs is barely understood. Though largely debated, the presence of circulating endogenous MSCs has been reported in multiple pathophysiological conditions, but the significance of such cell circulation is not known and therapeutically untapped. In this review, we discuss current knowledge on the circulation of native MSCs, and we highlight recent findings describing MSCs as putative key components of the ICN.
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Affiliation(s)
- Amandine Girousse
- Stromalab, Université de Toulouse, CNRS ERL5311, EFS, INP-ENVT, INSERM U1031, Université Paul Sabatier, Toulouse, France
| | - Maxime Mathieu
- Stromalab, Université de Toulouse, CNRS ERL5311, EFS, INP-ENVT, INSERM U1031, Université Paul Sabatier, Toulouse, France
| | - Quentin Sastourné-Arrey
- Sprott Center for Stem Cell Research, Ottawa Hospital Research Institute, Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Sylvie Monferran
- Stromalab, Université de Toulouse, CNRS ERL5311, EFS, INP-ENVT, INSERM U1031, Université Paul Sabatier, Toulouse, France
| | - Louis Casteilla
- Stromalab, Université de Toulouse, CNRS ERL5311, EFS, INP-ENVT, INSERM U1031, Université Paul Sabatier, Toulouse, France
| | - Coralie Sengenès
- Stromalab, Université de Toulouse, CNRS ERL5311, EFS, INP-ENVT, INSERM U1031, Université Paul Sabatier, Toulouse, France
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Girousse A, Virtue S, Hart D, Vidal-Puig A, Murgatroyd PR, Mouisel E, Sengenès C, Savage DB. Surplus fat rapidly increases fat oxidation and insulin resistance in lipodystrophic mice. Mol Metab 2018; 13:24-29. [PMID: 29789270 PMCID: PMC6026316 DOI: 10.1016/j.molmet.2018.05.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 05/02/2018] [Accepted: 05/07/2018] [Indexed: 11/24/2022] Open
Abstract
Objective Surplus dietary fat cannot be converted into other macronutrient forms or excreted, so has to be stored or oxidized. Healthy mammals store excess energy in the form of triacylgycerol (TAG) in lipid droplets within adipocytes rather than oxidizing it, and thus ultimately gain weight. The ‘overflow hypothesis’ posits that the capacity to increase the size and number of adipocytes is finite and that when this limit is exceeded, fat accumulates in ectopic sites and leads to metabolic disease. Methods Here we studied the energetic and biochemical consequences of short-term (2-day) excess fat ingestion in a lipodystrophic (A-ZIP/F-1) mouse model in which adipose capacity is severely restricted. Results In wildtype littermates, this acute exposure to high fat diets resulted in excess energy intake and weight gain without any significant changes in macronutrient oxidation rates, glucose, TAG, or insulin levels. In contrast, hyperphagic lipodystrophic mice failed to gain weight; rather, they significantly increased hepatic steatosis and fat oxidation. This response was associated with a significant increase in hyperglycemia, hyperinsulinemia, glucosuria, hypertriglyceridemia, and worsening insulin tolerance. Conclusions These data suggest that when adipose storage reserves are saturated, excess fat intake necessarily increases fat oxidation and induces oxidative substrate competition which exacerbates insulin resistance resolving any residual energy surplus through excretion of glucose. In contrast to wild type mice, lipodystrophic Azip mice manifest striking metabolic inflexibility. Wild type mice respond to excess dietary fat by storing the surplus energy and thus gain weight. In contrast, Azip mice increase fat oxidation and energy expenditure in response to surplus energy intake. Unfortunately this apparently ‘helpful’ adaptation also results in substrate competition and worsening insulin resistance.
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Affiliation(s)
- Amandine Girousse
- University of Cambridge Metabolic Research Laboratories, Wellcome Trust-Medical Research Council Institute of Metabolic Science, Cambridge, CB2 0QQ, United Kingdom
| | - Samuel Virtue
- University of Cambridge Metabolic Research Laboratories, Wellcome Trust-Medical Research Council Institute of Metabolic Science, Cambridge, CB2 0QQ, United Kingdom
| | - Dan Hart
- University of Cambridge Metabolic Research Laboratories, Wellcome Trust-Medical Research Council Institute of Metabolic Science, Cambridge, CB2 0QQ, United Kingdom
| | - Antonio Vidal-Puig
- University of Cambridge Metabolic Research Laboratories, Wellcome Trust-Medical Research Council Institute of Metabolic Science, Cambridge, CB2 0QQ, United Kingdom
| | - Peter R Murgatroyd
- NIHR/Wellcome Trust Clinical Research Facility, Addenbrooke's Hospital, Cambridge, UK
| | - Etienne Mouisel
- Institute of Cardiovascular and Metabolic Diseases, 31432, Toulouse, France
| | - Coralie Sengenès
- StromaLab, Paul Sabatier Toulouse University, ERL5311, 31432, Toulouse, France
| | - David B Savage
- University of Cambridge Metabolic Research Laboratories, Wellcome Trust-Medical Research Council Institute of Metabolic Science, Cambridge, CB2 0QQ, United Kingdom.
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Plaza A, Merino B, Cano V, Domínguez G, Pérez-Castells J, Fernández-Alfonso MS, Sengenès C, Chowen JA, Ruiz-Gayo M. Cholecystokinin is involved in triglyceride fatty acid uptake by rat adipose tissue. J Endocrinol 2018; 236:137-150. [PMID: 29339381 DOI: 10.1530/joe-17-0580] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Accepted: 01/16/2018] [Indexed: 11/08/2022]
Abstract
The incorporation of plasma triglyceride (TG) fatty acids to white adipose tissue (WAT) depends on lipoprotein lipase (LPL), which is regulated by angiopoietin-like protein-4 (ANGPTL-4), an unfolding molecular chaperone that converts active LPL dimers into inactive monomers. The production of ANGPTL-4 is promoted by fasting and repressed by feeding. We hypothesized that the postprandial hormone cholecystokinin (CCK) facilitates the storage of dietary TG fatty acids in WAT by regulating the activity of the LPL/ANGPTL-4 axis and that it does so by acting directly on CCK receptors in adipocytes. We report that administration of CCK-8 (a bioactive fragment of CCK) to rats: (i) reduces plasma ANGTPL-4 levels; (ii) represses Angptl-4 expression in WAT and (iii) simultaneously enhances LPL activity in this tissue without inducing Lpl expression. In vivo CCK-8 effects are specifically antagonized by the CCK-2 receptor (CCK-2R) antagonist, L-365,260. Moreover, CCK-8 downregulates Angptl-4 expression in wild-type pre-adipocytes, an effect that is not observed in engineered pre-adipocytes lacking CCK-2R. These effects have functional consequences as CCK-8 was found to promote the uptake of dietary fatty acids by WAT, as demonstrated by means of proton nuclear magnetic resonance (1H-NMR). The efficacy of acute CCK-8 administration was not reduced after chronic CCK-8 treatment. Moreover, the effects of CCK-8 on WAT were not associated to the increase of circulating insulin. Our results show that cholecystokinin promotes lipid storage in WAT by acting on adipocyte CCK-2R, suggesting a pivotal role for CCK in TG homeostasis.
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Affiliation(s)
- Adrián Plaza
- Departamento de Ciencias Farmacéuticas y de la SaludFacultad de Farmacia, Universidad San Pablo-CEU, Madrid, Spain
| | - Beatriz Merino
- Departamento de Ciencias Farmacéuticas y de la SaludFacultad de Farmacia, Universidad San Pablo-CEU, Madrid, Spain
| | - Victoria Cano
- Departamento de Ciencias Farmacéuticas y de la SaludFacultad de Farmacia, Universidad San Pablo-CEU, Madrid, Spain
| | - Gema Domínguez
- Departamento de Química y BioquímicaFacultad de Farmacia, Universidad San Pablo-CEU, Madrid, Spain
| | - Javier Pérez-Castells
- Departamento de Química y BioquímicaFacultad de Farmacia, Universidad San Pablo-CEU, Madrid, Spain
| | | | - Coralie Sengenès
- STROMALabUniversité de Toulouse, CNRS ERL5311, EFS, INP-ENVT, Inserm U1031, UPS, Toulouse, France
| | - Julie A Chowen
- Departamento de EndocrinologíaHospital Infantil Universitario Niño Jesús, Instituto de Investigación Sanitaria Princesa, CIBEROBN Instituto Carlos III, Madrid, Spain
| | - Mariano Ruiz-Gayo
- Departamento de Ciencias Farmacéuticas y de la SaludFacultad de Farmacia, Universidad San Pablo-CEU, Madrid, Spain
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6
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Luche E, Sengenès C, Arnaud E, Laharrague P, Casteilla L, Cousin B. Differential Hematopoietic Activity in White Adipose Tissue Depending on its Localization. J Cell Physiol 2015; 230:3076-83. [DOI: 10.1002/jcp.25045] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 05/12/2015] [Indexed: 01/08/2023]
Affiliation(s)
- Elodie Luche
- CNRS UMR 5273; STROMALab; BP 84225; Toulouse France
- Université de Toulouse 3; UPS, BP 84225; Toulouse France
- INSERM U1031, BP 84225; Toulouse France
- EFS Pyrénées-Méditerranée, BP 84225; Toulouse France
| | - Coralie Sengenès
- CNRS UMR 5273; STROMALab; BP 84225; Toulouse France
- Université de Toulouse 3; UPS, BP 84225; Toulouse France
- INSERM U1031, BP 84225; Toulouse France
- EFS Pyrénées-Méditerranée, BP 84225; Toulouse France
| | - Emmanuelle Arnaud
- CNRS UMR 5273; STROMALab; BP 84225; Toulouse France
- Université de Toulouse 3; UPS, BP 84225; Toulouse France
- INSERM U1031, BP 84225; Toulouse France
- EFS Pyrénées-Méditerranée, BP 84225; Toulouse France
| | - Patrick Laharrague
- CNRS UMR 5273; STROMALab; BP 84225; Toulouse France
- Université de Toulouse 3; UPS, BP 84225; Toulouse France
- INSERM U1031, BP 84225; Toulouse France
- EFS Pyrénées-Méditerranée, BP 84225; Toulouse France
- Laboratoire d'Hématologie, TSA 50032; Toulouse France
| | - Louis Casteilla
- CNRS UMR 5273; STROMALab; BP 84225; Toulouse France
- Université de Toulouse 3; UPS, BP 84225; Toulouse France
- INSERM U1031, BP 84225; Toulouse France
- EFS Pyrénées-Méditerranée, BP 84225; Toulouse France
| | - Beatrice Cousin
- CNRS UMR 5273; STROMALab; BP 84225; Toulouse France
- Université de Toulouse 3; UPS, BP 84225; Toulouse France
- INSERM U1031, BP 84225; Toulouse France
- EFS Pyrénées-Méditerranée, BP 84225; Toulouse France
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7
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Gil-Ortega M, Garidou L, Barreau C, Maumus M, Breasson L, Tavernier G, García-Prieto CF, Bouloumié A, Casteilla L, Sengenès C. Native adipose stromal cells egress from adipose tissue in vivo: evidence during lymph node activation. Stem Cells 2014; 31:1309-20. [PMID: 23533182 DOI: 10.1002/stem.1375] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Accepted: 02/13/2013] [Indexed: 02/05/2023]
Abstract
Adipose tissue (AT) has become accepted as a source of multipotent progenitor cells, the adipose stromal cells (ASCs). In this regard, considerable work has been performed to harvest and characterize this cell population as well as to investigate the mechanisms by which transplanted ASCs mediate tissue regeneration. In contrast the endogenous release of native ASCs by AT has been poorly investigated. In this work, we show that native ASCs egress from murine AT. Indeed, we demonstrated that the release of native ASCs from AT can be evidenced both using an ex vivo perfusion model that we set up and in vivo. Such a mobilization process is controlled by CXCR4 chemokine receptor. In addition, once mobilized from AT, circulating ASCs were found to navigate through lymph fluid and to home into lymph nodes (LN). Therefore, we demonstrated that, during the LN activation, the fat depot encapsulating the activated LN releases native ASCs, which in turn invade the activated LN. Moreover, the ASCs invading the LN were visualized in close physical interaction with podoplanin and ER-TR7 positive structures corresponding to the stromal network composing the LN. This dynamic was impaired with CXCR4 neutralizing antibody. Taken together, these data provide robust evidences that native ASCs can traffic in vivo and that AT might provide stromal cells to activated LNs.
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Cadoudal T, Buléon M, Sengenès C, Diene G, Desneulin F, Molinas C, Eddiry S, Conte-Auriol F, Daviaud D, Martin PGP, Bouloumié A, Salles JP, Tauber M, Valet P. Impairment of adipose tissue in Prader-Willi syndrome rescued by growth hormone treatment. Int J Obes (Lond) 2014; 38:1234-40. [PMID: 24406482 DOI: 10.1038/ijo.2014.3] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 12/06/2013] [Accepted: 01/01/2014] [Indexed: 11/09/2022]
Abstract
BACKGROUND Prader-Willi syndrome (PWS) results from abnormalities in the genomic imprinting process leading to hypothalamic dysfunction with an alteration of growth hormone (GH) secretion. PWS is associated with early morbid obesity and short stature which can be efficiently improved with GH treatment. OBJECTIVES Our aims were to highlight adipose tissue structural and functional impairments in children with PWS and to study the modifications of those parameters on GH treatment. SUBJECTS AND METHODS Plasma samples and adipose tissue biopsies were obtained from 23 research centers in France coordinated by the reference center for PWS in Toulouse, France. Lean controls (n=33), non-syndromic obese (n=53), untreated (n=26) and GH-treated PWS (n=43) children were enrolled in the study. Adipose tissue biopsies were obtained during scheduled surgeries from 15 lean control, 7 untreated and 8 GH-treated PWS children. RESULTS Children with PWS displayed higher insulin sensitivity as shown by reduced glycemia, insulinemia and HOMA-IR compared with non-syndromic obese children. In contrast, plasma inflammatory cytokines such as TNF-α, MCP-1 and IL-8 were increased in PWS. Analysis of biopsies compared with control children revealed decreased progenitor cell content in the stromal vascular fraction of adipose tissue and an impairment of lipolytic response to β-adrenergic agonist in PWS adipocytes. Interestingly, both of these alterations in PWS seem to be ameliorated on GH treatment. CONCLUSION Herein, we report adipose tissue dysfunctions in children with PWS which may be partially restored by GH treatment.
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Affiliation(s)
- T Cadoudal
- 1] INSERM, UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires I2MC, Toulouse, France [2] Université Paul Sabatier, UMR 1048, Toulouse, France
| | - M Buléon
- 1] INSERM, UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires I2MC, Toulouse, France [2] Université Paul Sabatier, UMR 1048, Toulouse, France
| | - C Sengenès
- 1] INSERM, UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires I2MC, Toulouse, France [2] Université Paul Sabatier, UMR 1048, Toulouse, France
| | - G Diene
- Unité d'endocrinologie, obésité, maladies osseuses, génétique et gynécologie médicale. Centre de référence du syndrome de Prader-Willi, Hôpital des enfants, Toulouse, France
| | - F Desneulin
- Axe pédiatrique du CIC 9302/INSERM. Hôpital des enfants, Toulouse, France
| | - C Molinas
- 1] Unité d'endocrinologie, obésité, maladies osseuses, génétique et gynécologie médicale. Centre de référence du syndrome de Prader-Willi, Hôpital des enfants, Toulouse, France [2] Axe pédiatrique du CIC 9302/INSERM. Hôpital des enfants, Toulouse, France
| | - S Eddiry
- INSERM, UMR 1043, Toulouse, France
| | - F Conte-Auriol
- 1] Axe pédiatrique du CIC 9302/INSERM. Hôpital des enfants, Toulouse, France [2] INSERM, UMR 1043, Toulouse, France
| | - D Daviaud
- 1] INSERM, UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires I2MC, Toulouse, France [2] Université Paul Sabatier, UMR 1048, Toulouse, France
| | - P G P Martin
- 1] INRA, UMR1331, Toxalim, Research Centre in Food Toxicology, Toulouse, France [2] Université de Toulouse, INP, UMR1331, Toxalim, Toulouse, France
| | - A Bouloumié
- 1] INSERM, UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires I2MC, Toulouse, France [2] Université Paul Sabatier, UMR 1048, Toulouse, France
| | - J-P Salles
- 1] Unité d'endocrinologie, obésité, maladies osseuses, génétique et gynécologie médicale. Centre de référence du syndrome de Prader-Willi, Hôpital des enfants, Toulouse, France [2] Axe pédiatrique du CIC 9302/INSERM. Hôpital des enfants, Toulouse, France [3] INSERM, UMR 1043, Toulouse, France
| | - M Tauber
- 1] Unité d'endocrinologie, obésité, maladies osseuses, génétique et gynécologie médicale. Centre de référence du syndrome de Prader-Willi, Hôpital des enfants, Toulouse, France [2] INSERM, UMR 1043, Toulouse, France
| | - P Valet
- 1] INSERM, UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires I2MC, Toulouse, France [2] Université Paul Sabatier, UMR 1048, Toulouse, France
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9
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Gil-Ortega M, Fernández-Alfonso MS, Somoza B, Casteilla L, Sengenès C. Ex vivo microperfusion system of the adipose organ: a new approach to studying the mobilization of adipose cell populations. Int J Obes (Lond) 2013; 38:1255-62. [PMID: 24357852 DOI: 10.1038/ijo.2013.243] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 11/28/2013] [Accepted: 12/16/2013] [Indexed: 12/26/2022]
Abstract
BACKGROUND/OBJECTIVES Adipose tissue (AT) is a dynamic organ that expands and contracts rapidly. It is composed of adipocytes and of cell populations among which immune cells and mesenchymal progenitors known as adipose stromal cells (ASCs). The AT cell turnover has been extensively studied. Surprisingly it has only been viewed as the result of both cell proliferation/death and cell infiltration. Nevertheless, both immune cells and ASCs exhibit migration abilities; therefore their egress from AT in response to physiological/pathophysiological stimuli has to be considered. To do so, the aim of the present work was to develop a model allowing the study of cell release from the adipose organ. SUBJECTS/METHODS Mesenteric (Mes) ATs were isolated from 9-week-old C57BL/6 male mice and were catheterized via the superior mesenteric artery and were perfused with a saline solution. After an equilibration period, the mesenteric fat pad was perfused with CXCL12 (stromal-derived factor-1, SDF-1) or sphingosine 1-phosphate (S1P) to trigger cell mobilization and perfusates were collected every 30 min for subsequent flow cytometry analyses. RESULTS We report here that CXCL12 induces the specific release of ASCs from MesAT thus demonstrating that ASCs are specifically mobilized from fat depots by a CXCL12-dependent pathway. Moreover, we showed that leukocyte mobilization can be triggered via a S1P-dependent pathway. CONCLUSIONS We have developed a microperfusion model of an intact fat depot allowing the study of AT cell release in response to various molecules. The perfusion system described here demonstrates that ASCs and leukocytes can be pharmacologically mobilized from AT. Therefore, AT microperfusion might constitute an appropriate and reliable approach for evaluating the mobilization of different cell populations from AT in various physiological and pathophysiological contexts. Such a model might help in identifying factors and drugs controlling AT cell release, impacting the medical fields of regenerative medicine and of obesity or its associated comorbidities.
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Affiliation(s)
- M Gil-Ortega
- 1] Inserm U1031 STROMAlab BP 84 225-F-31 432, Toulouse, France [2] CNRS, Université Toulouse III, UPS UMR5273 STROMAlab, BP 84 225-F-31 432, Toulouse, France [3] EFS (Etablissement Français du Sang), STROMAlab BP 84 225-F-31 432, Toulouse, France [4] Université Toulouse III, UPS UMR5273 STROMAlab BP 84 225-F-31 432, Toulouse, France
| | - M S Fernández-Alfonso
- Instituto Pluridisciplinar, Facultad de Farmacia, Universidad Complutense de Madrid, Juan XXIII 1, 28040 Madrid, Spain
| | - B Somoza
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU-San Pablo, 28668 Madrid, Spain
| | - L Casteilla
- 1] Inserm U1031 STROMAlab BP 84 225-F-31 432, Toulouse, France [2] CNRS, Université Toulouse III, UPS UMR5273 STROMAlab, BP 84 225-F-31 432, Toulouse, France [3] EFS (Etablissement Français du Sang), STROMAlab BP 84 225-F-31 432, Toulouse, France [4] Université Toulouse III, UPS UMR5273 STROMAlab BP 84 225-F-31 432, Toulouse, France
| | - C Sengenès
- 1] Inserm U1031 STROMAlab BP 84 225-F-31 432, Toulouse, France [2] CNRS, Université Toulouse III, UPS UMR5273 STROMAlab, BP 84 225-F-31 432, Toulouse, France [3] EFS (Etablissement Français du Sang), STROMAlab BP 84 225-F-31 432, Toulouse, France [4] Université Toulouse III, UPS UMR5273 STROMAlab BP 84 225-F-31 432, Toulouse, France
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Monteiro MC, Sanyal M, Cleary ML, Sengenès C, Bouloumié A, Bouloumé A, Dani C, Billon N. PBX1: a novel stage-specific regulator of adipocyte development. Stem Cells 2012; 29:1837-48. [PMID: 21922607 DOI: 10.1002/stem.737] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Although adipocyte terminal differentiation has been extensively studied, the early steps of adipocyte development and the embryonic origin of this lineage remain largely unknown. Here we describe a novel role for the pre-B-cell leukemia transcription factor one (PBX1) in adipocyte development using both mouse embryonic stem cells (mESCs) and human multipotent adipose-derived stem (hMADS) cells. We show that Pbx1(-/-) mESCs are unable to generate adipocytes, despite normal expression of neuroectoderm and neural crest (NC) markers. Early adipocyte lineage markers are not induced in Pbx1(-/-) mESCs, suggesting that Pbx1 controls the generation and/or the maintenance of adipocyte progenitors (APs) from the NC. We further characterize the function of PBX1 in postnatal adipogenesis and show that silencing of PBX1 expression in hMADS cells reduces their proliferation by preventing their entry in the S phase of the cell cycle. Furthermore, it promotes differentiation of hMADS cells into adipocytes and partially substitutes for glucocorticoids and rosiglitazone, two key proadipogenic agents. These effects involve direct modulation of PPARγ activity, most likely through regulation of the biosynthesis of PPARγ natural endogenous ligand(s). Together, our data suggest that PBX1 regulates adipocyte development at multiple levels, promoting the generation of NC-derived APs during embryogenesis, while favoring APs proliferation and preventing their commitment to the adipocyte lineage in postnatal life.
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Bourlier V, Sengenès C, Zakaroff-Girard A, Decaunes P, Wdziekonski B, Galitzky J, Villageois P, Esteve D, Chiotasso P, Dani C, Bouloumié A. TGFbeta family members are key mediators in the induction of myofibroblast phenotype of human adipose tissue progenitor cells by macrophages. PLoS One 2012; 7:e31274. [PMID: 22355352 PMCID: PMC3280291 DOI: 10.1371/journal.pone.0031274] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Accepted: 01/05/2012] [Indexed: 02/06/2023] Open
Abstract
Objective The present study was undertaken to characterize the remodeling phenotype of human adipose tissue (AT) macrophages (ATM) and to analyze their paracrine effects on AT progenitor cells. Research Design and Methods The phenotype of ATM, immunoselected from subcutaneous (Sc) AT originating from subjects with wide range of body mass index and from paired biopsies of Sc and omental (Om) AT from obese subjects, was studied by gene expression analysis in the native and activated states. The paracrine effects of ScATM on the phenotype of human ScAT progenitor cells (CD34+CD31−) were investigated. Results Two main ATM phenotypes were distinguished based on gene expression profiles. For ScAT-derived ATM, obesity and adipocyte-derived factors favored a pro-fibrotic/remodeling phenotype whereas the OmAT location and hypoxic culture conditions favored a pro-angiogenic phenotype. Treatment of native human ScAT progenitor cells with ScATM-conditioned media induced the appearance of myofibroblast-like cells as shown by expression of both α-SMA and the transcription factor SNAIL, an effect mimicked by TGFβ1 and activinA. Immunohistochemical analyses showed the presence of double positive α-SMA and CD34 cells in the stroma of human ScAT. Moreover, the mRNA levels of SNAIL and SLUG in ScAT progenitor cells were higher in obese compared with lean subjects. Conclusions Human ATM exhibit distinct pro-angiogenic and matrix remodeling/fibrotic phenotypes according to the adiposity and the location of AT, that may be related to AT microenvironment including hypoxia and adipokines. Moreover, human ScAT progenitor cells have been identified as target cells for ScATM-derived TGFβ and as a potential source of fibrosis through their induction of myofibroblast-like cells.
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Affiliation(s)
- Virginie Bourlier
- UMR1048, Institut National de la Santé et de la Recherche Médicale (INSERM), Université Toulouse III Paul-Sabatier, Toulouse, France.
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Maumus M, Peyrafitte JA, D'Angelo R, Fournier-Wirth C, Bouloumié A, Casteilla L, Sengenès C, Bourin P. Native human adipose stromal cells: localization, morphology and phenotype. Int J Obes (Lond) 2011; 35:1141-53. [PMID: 21266947 PMCID: PMC3172585 DOI: 10.1038/ijo.2010.269] [Citation(s) in RCA: 403] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Objectives: Beside having roles in energy homeostasis and endocrine modulation, adipose tissue (AT) is now considered a promising source of mesenchymal stromal cells (adipose-derived stromal cells or ASCs) for regenerative medicine. Despite numerous studies on cultured ASCs, native human ASCs are rarely investigated. Indeed, the phenotype of ASCs in their native state, their localization within AT and comparison with bone marrow-derived mesenchymal stromal cells (BM-MSCs) has been poorly investigated. Design: To address these issues, the stroma vascular fraction (SVF) of human AT was extracted and native cell subtypes were isolated by immunoselection to study their clonogenic potential in culture. Immunohistology on samples of human AT in combination with reconstruction of confocal sections were performed in order to localize ASCs. Results: Compared with BM-MNCs, all native ASCs were found in the CD34+ cell fraction of the AT-SVF. Native ASCs expressed classical mesenchymal markers described for BM-MSCs. Interestingly, CD34 expression decreased during ASC cell culture and was negatively correlated with cell proliferation rate. Immunohistological analysis revealed that native ASCs exhibited specific morphological features with protrusions. They were found scattered in AT stroma and did not express in vivo pericytic markers such as NG2, CD140b or alpha-smooth muscle actin, which appeared during the culture process. Finally, ASCs spontaneous commitment to adipocytic lineage was enhanced in AT from obese humans. Conclusions: The use of complementary methodological approaches to study native human ASCs revealed their immunophenotype, their specific morphology, their location within AT and their stemness. Furthermore, our data strongly suggest that human ASCs participate in adipogenesis during AT development.
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Affiliation(s)
- M Maumus
- Institut National de Santé et de Recherche Médicale (INSERM), U858, Université Toulouse III Paul Sabatier, Institut de Médecine Moléculaire de Rangueil (I2MR), Equipe n°1 AVENIR, Toulouse, France
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Decaunes P, Estève D, Zakaroff-Girard A, Sengenès C, Galitzky J, Bouloumié A. Adipose-derived stromal cells: cytokine expression and immune cell contaminants. Methods Mol Biol 2011; 702:151-161. [PMID: 21082401 DOI: 10.1007/978-1-61737-960-4_12] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The present method describes an immunoselection/depletion approach to isolate the native human adipose tissue-derived progenitor cells that are free from endothelial cells and immune cells by the use of magnetic nanobeads and microbeads coupled to antibodies. Moreover, methods to isolate and to analyse the distinct cell populations that constitute the microenvironment of the human adipose tissue progenitor cells, i.e. mature adipocytes, endothelial cells, and macrophages, are mentioned.
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Affiliation(s)
- Pauline Decaunes
- Institut National de la Santé et de la Recherche Médicale (INSERM), Institut de Médecine Moléculaire de Rangueil, Université Toulouse III Paul-Sabatier, Toulouse, France
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Villaret A, Galitzky J, Decaunes P, Estève D, Marques MA, Sengenès C, Chiotasso P, Tchkonia T, Lafontan M, Kirkland JL, Bouloumié A. Adipose tissue endothelial cells from obese human subjects: differences among depots in angiogenic, metabolic, and inflammatory gene expression and cellular senescence. Diabetes 2010; 59:2755-63. [PMID: 20713685 PMCID: PMC2963533 DOI: 10.2337/db10-0398] [Citation(s) in RCA: 180] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVE Regional differences among adipose depots in capacities for fatty acid storage, susceptibility to hypoxia, and inflammation likely contribute to complications of obesity. We defined the properties of endothelial cells (EC) isolated from subcutaneous adipose tissue (SAT) and visceral adipose tissue (VAT) biopsied in parallel from obese subjects. RESEARCH DESIGN AND METHODS The architecture and properties of the fat tissue capillary network were analyzed using immunohistochemistry and flow cytometry. CD34(+)/CD31(+) EC were isolated by immunoselection/depletion. Expression of chemokines, adhesion molecules, angiogenic factor receptors, as well as lipogenic and senescence-related genes were assayed by real-time PCR. Fat cell size and expression of hypoxia-dependent genes were determined in adipocytes from both fat depots. RESULTS Hypoxia-related genes were more highly expressed in VAT than SAT adipocytes. VAT adipocytes were smaller than SAT adipocytes. Vascular density and EC abundance were higher in VAT. VAT-EC exhibited a marked angiogenic and inflammatory state with decreased expression of metabolism-related genes, including endothelial lipase, GPIHBP1, and PPAR gamma. VAT-EC had enhanced expression of the cellular senescence markers, IGFBP3 and γ-H2AX, and decreased expression of SIRT1. Exposure to VAT adipocytes caused more EC senescence-associated β-galactosidase activity than SAT adipocytes, an effect reduced in the presence of vascular endothelial growth factor A (VEGFA) neutralizing antibodies. CONCLUSIONS VAT-EC exhibit a more marked angiogenic and proinflammatory state than SAT-EC. This phenotype may be related to premature EC senescence. VAT-EC may contribute to hypoxia and inflammation in VAT.
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Affiliation(s)
- Aurélie Villaret
- Institut National de la Santé et de la Recherche Médicale (INSERM), U858, Institut de Médecine Moléculaire de Rangueil, Toulouse, France, and Université Paul Sabatier Toulouse-III, Toulouse, France
- Laboratoires Sérobiologiques, Division of Cognis, Pulnoy, France
| | - Jean Galitzky
- Institut National de la Santé et de la Recherche Médicale (INSERM), U858, Institut de Médecine Moléculaire de Rangueil, Toulouse, France, and Université Paul Sabatier Toulouse-III, Toulouse, France
| | - Pauline Decaunes
- Institut National de la Santé et de la Recherche Médicale (INSERM), U858, Institut de Médecine Moléculaire de Rangueil, Toulouse, France, and Université Paul Sabatier Toulouse-III, Toulouse, France
| | - David Estève
- Institut National de la Santé et de la Recherche Médicale (INSERM), U858, Institut de Médecine Moléculaire de Rangueil, Toulouse, France, and Université Paul Sabatier Toulouse-III, Toulouse, France
| | - Marie-Adeline Marques
- Institut National de la Santé et de la Recherche Médicale (INSERM), U858, Institut de Médecine Moléculaire de Rangueil, Toulouse, France, and Université Paul Sabatier Toulouse-III, Toulouse, France
| | - Coralie Sengenès
- Institut National de la Santé et de la Recherche Médicale (INSERM), U858, Institut de Médecine Moléculaire de Rangueil, Toulouse, France, and Université Paul Sabatier Toulouse-III, Toulouse, France
| | | | - Tamara Tchkonia
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, Minnesota
| | - Max Lafontan
- Institut National de la Santé et de la Recherche Médicale (INSERM), U858, Institut de Médecine Moléculaire de Rangueil, Toulouse, France, and Université Paul Sabatier Toulouse-III, Toulouse, France
| | - James L. Kirkland
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, Minnesota
| | - Anne Bouloumié
- Institut National de la Santé et de la Recherche Médicale (INSERM), U858, Institut de Médecine Moléculaire de Rangueil, Toulouse, France, and Université Paul Sabatier Toulouse-III, Toulouse, France
- Corresponding author: Anne Bouloumié,
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Fanjul M, Gmyr V, Sengenès C, Ratovo G, Dufresne M, Lefebvre B, Kerr-Conte J, Hollande E. Evidence for epithelial-mesenchymal transition in adult human pancreatic exocrine cells. J Histochem Cytochem 2010; 58:807-23. [PMID: 20530463 DOI: 10.1369/jhc.2010.955807] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
It has been shown that adult pancreatic ductal cells can dedifferentiate and act as pancreatic progenitors. Dedifferentiation of epithelial cells is often associated with the epithelial-mesenchymal transition (EMT). In this study, we investigated the occurrence of EMT in adult human exocrine pancreatic cells both in vitro and in vivo. Cells of exocrine fraction isolated from the pancreas of brain-dead donors were first cultured in suspension for eight days. This led to the formation of spheroids, composed of a principal population of cells with duct-like phenotype. When cultivated in tissue culture-treated flasks, spheroid cells exhibited a proliferative capacity and coexpressed epithelial (cytokeratin7 and cytokeratin19) and mesenchymal (vimentin and alpha-smooth muscle actin) markers as well as marker of progenitor pancreatic cells (pancreatic duodenal homeobox factor-1) and surface markers of mesenchymal stem cells. The switch from E-cadherin to N-cadherin associated with Snail1 expression suggested that these cells underwent EMT. In addition, we showed coexpression of epithelial and mesenchymal markers in ductal cells of one normal adult pancreas and three type 2 diabetic pancreases. Some of the vimentin-positive cells were found to coexpress glucagon or amylase. These results point to the occurrence of EMT, which may take place on dedifferentiation of ductal cells during the regeneration or renewal of human pancreatic tissues.
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Affiliation(s)
- Marjorie Fanjul
- Institut National de la Santé et de la Recherche Médicale U858, Toulouse, France
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Duffaut C, Zakaroff-Girard A, Bourlier V, Decaunes P, Maumus M, Chiotasso P, Sengenès C, Lafontan M, Galitzky J, Bouloumié A. Interplay between human adipocytes and T lymphocytes in obesity: CCL20 as an adipochemokine and T lymphocytes as lipogenic modulators. Arterioscler Thromb Vasc Biol 2009; 29:1608-14. [PMID: 19644053 DOI: 10.1161/atvbaha.109.192583] [Citation(s) in RCA: 184] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE Adipose tissue (AT) plays a major role in the low-grade inflammatory state associated with obesity. The aim of the present study was to characterize the human AT lymphocytes (ATLs) and to analyze their interactions with adipocytes. METHODS AND RESULTS Human ATL subsets were characterized by flow cytometry in subcutaneous ATs from 92 individuals with body mass index (BMI) ranging from 19 to 43 kg/m(2) and in paired biopsies of subcutaneous and visceral AT from 45 class II/III obese patients. CD3(+) ATLs were composed of effector and memory CD4(+) helper and CD8(+) cytotoxic T cells. The number of ATLs correlated positively with BMI and was higher in visceral than subcutaneous AT. Mature adipocytes stimulated the migration of ATLs and released the chemokine CCL20, the receptor of which (CCR6) was expressed in ATLs. The expression of adipocyte CCL20 was positively correlated with BMI and increased in visceral compared to subcutaneous adipocytes. ATLs expressed inflammatory markers and released interferon gamma (IFN gamma). Progenitor and adipocyte treatment with ATL-conditioned media reduced the insulin-mediated upregulation of lipogenic enzymes, an effect involving IFN gamma. CONCLUSIONS Therefore, crosstalk occurs between adipocytes and lymphocytes within human AT involving T cell chemoattraction by adipocytes and modulation of lipogenesis by ATLs.
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Affiliation(s)
- Carine Duffaut
- Institut National de la Santé et de la Recherche Médicale (INSERM), U858, Toulouse, France
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Maumus M, Sengenès C, Decaunes P, Zakaroff-Girard A, Bourlier V, Lafontan M, Galitzky J, Bouloumié A. Evidence of in situ proliferation of adult adipose tissue-derived progenitor cells: influence of fat mass microenvironment and growth. J Clin Endocrinol Metab 2008; 93:4098-106. [PMID: 18682517 DOI: 10.1210/jc.2008-0044] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT Adipocyte formation in human adult adipose tissue (hAT) originates from resident progenitor cell differentiation in the stroma vascular fraction of the AT. The processes involved in the self-renewal of this cell population remain to be defined. OBJECTIVE The objective was to study in situ and in vitro hAT progenitor cell (defined as CD34(+)/CD31(-) cells) proliferation. DESIGN AND PARTICIPANTS In situ progenitor cell proliferation was assessed by immunohistochemistry and flow cytometry analyses on hAT from lean to obese subjects using the proliferation marker Ki-67. The effects of adipokines, hypoxia, and conditioned media (CM) from adipocytes, capillary endothelial cells, and macrophages isolated by an immunoselection approach were studied on hAT progenitor cell growth. Cell death in hAT was assessed by the terminal deoxynucleotidyl transferase-mediated dUTP-fluorescein end labeling method. RESULTS Ki-67-positive staining was observed in AT progenitor cells. Fat mass enlargement in obese patients was associated with an increased Ki-67(+) progenitor cell population together with a new fraction of small adipocytes and increased cell death. HIF-1alpha mRNA expression in freshly harvested progenitor cells was positively correlated with body mass index. Adipocyte- and capillary endothelial cell-CM, hypoxia, leptin, IL-6, lysophosphatidic acid, and vascular endothelial growth factor, all increased hAT progenitor cell proliferation in vitro. Macrophage-CM had an antiproliferative effect that was suppressed by an antioxidant. CONCLUSIONS The fraction of proliferative progenitor cells in adult hAT is modulated by the degree of adiposity. Changes in the progenitor cell microenvironment involving adipokines, hypoxia, and oxidative stress might play a key role in the control of the self-renewal of the local pool of AT progenitor cells.
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Affiliation(s)
- Marie Maumus
- Hôpital Rangueil Bat L4, BP 84225, 31432 Toulouse Cedex 04, France
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Abstract
In recent years, the general concept has emerged that chronic low-grade inflammation can be the condition linking excessive development of adipose tissue (AT) and obesity-associated pathologies such as type II diabetes and atherosclerosis. Moreover, the evidence that the growth of the fat mass was associated with an accumulation of adipose tissue macrophages (ATM) has raised the hypothesis that the development of an inflammatory process within the growing fat mass is a primary event involved in the genesis of systemic metabolic and vascular alterations. As ATM originate from the bone marrow/blood compartment, enhanced macrophage recruitment to growing AT is suspected. However, the mechanisms responsible for attracting the blood cells and their entry into the fat mass remain to be clearly defined. The present review highlights the key role of endothelial cells in the control of the inflammatory process and describes the potential involvement of AT-endothelial cells as well as the factors involved in the regulation of their phenotype in the 'inflamed fat tissue'.
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Affiliation(s)
- C Sengenès
- Inserm, Equipe Avenir, Unité de Recherches sur les Obésités, Toulouse, France
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Sengenès C, Miranville A, Maumus M, de Barros S, Busse R, Bouloumié A. Chemotaxis and differentiation of human adipose tissue CD34+/CD31- progenitor cells: role of stromal derived factor-1 released by adipose tissue capillary endothelial cells. Stem Cells 2007; 25:2269-76. [PMID: 17525234 DOI: 10.1634/stemcells.2007-0180] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The native CD34+/CD31- cell population present in the stroma-vascular fraction of human adipose tissue (hAT) displays progenitor cell properties since they exhibit adipocyte- and endothelial cell-like phenotypes under appropriate stimuli. To analyze the signals within hAT regulating their phenotypes, the influence of hAT-derived capillary endothelial cells (CECs) was studied on the chemotaxis and differentiation of the hAT-CD34+/CD31- cells. Conditioned medium from hAT-CECs led to a strong chemotaxis of the hAT-CD34+/CD31- cells that was inhibited with pretreatments with pertussis toxin, CXCR-4 antagonist, or neutralizing antibodies. Furthermore, hAT-CECs produced and secreted the CXCR-4 ligand, that is, the stromal derived factor-1 (SDF-1). Finally, hAT-CECs induced the differentiation of hAT-CD34+/CD31- cells toward an endothelial cell (EC) phenotype. Indeed, hAT-CECs and -CD34+/CD31- cell coculture stimulated in a two-dimensional system the expression of the EC CD31 marker by the hAT-progenitor cells and, in a three-dimensional approach, the formation of capillary-like structures via a SDF-1/CXCR-4 dependent pathway. Thus, the migration and differentiation of hAT progenitor cells are modulated by hAT-CEC-derived factors. SDF-1, which is secreted by hAT-derived CECs, and its receptor CXCR-4, expressed by hAT-derived progenitor cells, may promote chemotaxis and differentiation of hAT-derived progenitor cells and thus contribute to the formation of the vascular network during the development of hAT.
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Affiliation(s)
- Coralie Sengenès
- Institut National de la Santé et de la Recherche Médicale, U858, AVENIR Team, I2MR, Paul Sabatier University, IFR31, Toulouse, France.
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Curat CA, Wegner V, Sengenès C, Miranville A, Tonus C, Busse R, Bouloumié A. Macrophages in human visceral adipose tissue: increased accumulation in obesity and a source of resistin and visfatin. Diabetologia 2006; 49:744-7. [PMID: 16496121 DOI: 10.1007/s00125-006-0173-z] [Citation(s) in RCA: 465] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2005] [Accepted: 11/25/2005] [Indexed: 10/25/2022]
Abstract
AIMS/HYPOTHESIS Increased visceral white adipose tissue (WAT) is linked to the risk of developing diabetes. METHODS/RESULTS We showed by fluorescence activated cell sorting analysis that human visceral WAT contains macrophages, the proportion of which increased with obesity. Selective isolation of mature adipocytes and macrophages from human visceral WAT by CD14 immunoselection revealed that macrophages expressed higher levels of chemokines (monocyte chemotactic protein 1, macrophage inflammatory protein 1alpha, IL-8) and the adipokines resistin and visfatin than did mature adipocytes, as assessed by real-time PCR analysis. Moreover, resistin and visfatin proteins were found to be released predominantly by visceral WAT macrophages. Macrophage-derived secretory products stimulated phosphorylation of protein kinase B in human hepatocytes. CONCLUSIONS/INTERPRETATION Resistin and visfatin might be considered to be proinflammatory markers. The increased macrophage population in obese human visceral WAT might be responsible for the enhanced production of chemokines as well as resistin and visfatin.
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Affiliation(s)
- C A Curat
- Institute of Cardiovascular Physiology, Johann Wolfgang Goethe University, Theodor-Stern Kai 7, 60590, Frankfurt am Main, Germany
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Sengenès C, Lolmède K, Zakaroff-Girard A, Busse R, Bouloumié A. Preadipocytes in the human subcutaneous adipose tissue display distinct features from the adult mesenchymal and hematopoietic stem cells. J Cell Physiol 2005; 205:114-22. [PMID: 15880450 DOI: 10.1002/jcp.20381] [Citation(s) in RCA: 426] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The stroma-vascular fraction (SVF) of human adipose tissue has recently been described to be composed of endothelial cells identified as CD34+/CD31+ cells, infiltrated/resident macrophages defined as CD14+/CD31+ cells, and a new cell population characterized as CD34+/CD31- cells. To elucidate the cell identity of the adipocyte precursor cells, fluorescent activating cell sorter (FACS) analyses were performed on crude SVF cultured under adipogenic conditions, i.e., serum-deprived medium containing insulin, cortisol, triiodothyronine, and supplemented with a PPARgamma agonist for the first 3 days. The progressive accumulation of lipid droplets was associated with a selective enrichment of the CD34+/CD31- cell population whereas control experiments performed in medium supplemented with 10% serum showed an overall downregulation of the three cell markers without adipogenesis. Among the different cell subsets, the CD34+/CD31- subset was the unique cell fraction able to answer to adipogenic culture conditions. Indeed, a time-dependent expression of adipocyte markers as well as acquisition of adipocyte-typical metabolic activities were observed. In parallel, the gene expression of lipogenic and lipolytic enzymes increased. The ability to differentiate into adipocytes was restricted to cells that did not express the mesenchymal stem cell marker CD105. Furthermore, the CD34+/CD31- cells did not respond to culture conditions used for hematopoietic colony assays. Taken together, the present study demonstrates that adipocyte progenitor cells, i.e., the preadipocytes, are included in the CD34+/CD31- cell fraction, which displays distinct features from the adult mesenchymal and hematopoietic stem cells.
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Affiliation(s)
- Coralie Sengenès
- Institute of Cardiovascular Physiology, Johann Wolfgang Goethe University, Frankfurt am Main, Germany. coralie@
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Abstract
PURPOSE OF REVIEW White adipose tissue is necessary for optimal energy homeostasis and the excessive development of fat mass is clearly associated with the metabolic syndrome. The fact that adipocytes secrete a number of specific factors or 'adipokines' has forced a reassessment of the involvement of adipose tissue in a wide range of physiological and pathophysiological processes. Obesity has recently been described as a 'low-grade' inflammatory condition, a state proposed to represent a common determinator in the genesis of obesity-associated pathologies, i.e. diabetes and atherosclerosis. RECENT FINDINGS Recent reports of an increase in the number of macrophages that infiltrate the fat mass in obese individuals led to the suggestion that adipose tissue itself is a source and site of inflammation. SUMMARY This review summarizes recent data on the characterization of the macrophage population in fat tissue. Their origin, fate and activation will be considered. The potential involvement of adipose tissue macrophages in the development of insulin resistance and vascular pathologies, as well as in the control of adipose tissue growth and metabolism, will be examined.
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Affiliation(s)
- Anne Bouloumié
- Institute of Cardiovascular Physiology, Johann Wolfgang Goethe University, Theodor Stern Kai 7, 60590 Frankfurt am Main, Germany.
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Moro C, Polak J, Richterova B, Sengenès C, Pelikanova T, Galitzky J, Stich V, Lafontan M, Berlan M. Differential regulation of atrial natriuretic peptide- and adrenergic receptor-dependent lipolytic pathways in human adipose tissue. Metabolism 2005; 54:122-31. [PMID: 15562390 DOI: 10.1016/j.metabol.2004.07.020] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The aim of the study was to investigate the regulation affecting the recently described atrial natriuretic peptide (ANP)-dependent lipolytic pathway in comparison with the adrenergic lipolytic cascade. We studied in vivo the effect of a euglycemic-hyperinsulinemic clamp on the changes occurring in the extracellular glycerol concentration (EGC) of subcutaneous adipose tissue (SCAT) during ANP or epinephrine perfusion in a microdialysis probe. Homologous desensitization and the incidence of hyperinsulinemia on the ANP- and catecholaminergic-dependent control of lipolysis were also investigated in vitro on fat cells from SCAT. When perfused in SCAT, epinephrine and ANP promoted an increase in EGC; the EGC increase was significantly lower during the clamp. The reduction of epinephrine-induced lipolysis was limited (18%) when phentolamine (an alpha(2)-adrenergic receptor [AR] antagonist) was perfused together with epinephrine. Unlike the effect of epinephrine, the response to ANP observed during the second perfusion was reduced by 32%. The increase in extracellular guanosine 3',5' -cyclic monophosphate concentration, which reflects ANP activity, was also reduced during the second perfusion. Desensitization of the lipolytic effects of ANP was observed in vitro after a 2-hour period of recovery, while the effects of alpha(2)-AR agonist or of epinephrine were unchanged. Insulin was without any effect on ANP-induced lipolysis and alpha(2)-AR-mediated antilipolysis, while it reduced beta-AR-induced lipolysis. The ANP-dependent lipolytic pathway undergoes desensitization in vitro and in situ. Insulin had no inhibitory effect on either ANP- or alpha(2)-AR-dependent pathways, while it counteracted the beta-AR pathway.
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Affiliation(s)
- Cédric Moro
- Unité de Recherches sur les Obésités Inserm U586, Institut Louis Bugnard, Center Hospitalier Universitaire de Toulouse, Université Paul Sabatier, 31062 Toulouse, France
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25
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Abstract
BACKGROUND Several studies have suggested that stem cells are present in the stroma-vascular fraction (SVF) of adipose tissue (AT). METHODS AND RESULTS To characterize the cell populations that compose the SVF of human AT originating from subcutaneous and visceral depots, fluorescence-activated cell sorter analysis was performed by use of fluorescent antibodies directed against the endothelial and stem cell markers CD31, CD34, CD133, and ABCG2. The freshly harvested SVF contained large numbers of CD34+ cells as well as cells expressing CD133 and ABCG2. Further analysis of the CD34+ cells revealed 2 CD34+ cell populations with differential expression of the endothelial cell marker CD31. Selection of the CD34+/CD31- cells by use of magnetic microbeads, followed by cell culture, demonstrated that this cell population could differentiate under appropriate conditions into endothelial cells. Moreover, in mouse ischemic hindlimb, intravenous injection of CD34(+)/CD31(-) cells was associated with an increase in the blood flow and the capillary density and an incorporation of the cells in the leg vasculature. CONCLUSIONS Our data indicate the presence of a cell population within the SVF of human AT characterized as CD34+/CD31- exhibiting characteristics of endothelial progenitor cells. Therefore, human AT might represent a source of stem/progenitor cells useful for cell therapy to improve vasculogenesis in adults.
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Affiliation(s)
- A Miranville
- Department of Cardiovascular Physiology, J-W Goethe University, Frankfurt, Germany
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Curat CA, Miranville A, Sengenès C, Diehl M, Tonus C, Busse R, Bouloumié A. From blood monocytes to adipose tissue-resident macrophages: induction of diapedesis by human mature adipocytes. Diabetes 2004; 53:1285-92. [PMID: 15111498 DOI: 10.2337/diabetes.53.5.1285] [Citation(s) in RCA: 393] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Obesity has been suggested to be a low-grade systemic inflammatory state, therefore we studied the interaction between human adipocytes and monocytes via adipose tissue (AT)-derived capillary endothelium. Cells composing the stroma-vascular fraction (SVF) of human ATs were characterized by fluorescence-activated cell sorter (FACS) analysis and two cell subsets (resident macrophages and endothelial cells [ECs]) were isolated using antibody-coupled microbeads. Media conditioned by mature adipocytes maintained in fibrin gels were applied to AT-derived ECs. Thereafter, the expression of endothelial adhesion molecules was analyzed as well as the adhesion and transmigration of human monocytes. FACS analysis showed that 11% of the SVF is composed of CD14(+)/CD31(+) cells, characterized as resident macrophages. A positive correlation was found between the BMI and the percentage of resident macrophages, suggesting that fat tissue growth is associated with a recruitment of blood monocytes. Incubation of AT-derived ECs with adipocyte-conditioned medium resulted in the upregulation of EC adhesion molecules and the increased chemotaxis of blood monocytes, an effect mimicked by recombinant human leptin. These results indicate that adipokines, such as leptin, activate ECs, leading to an enhanced diapedesis of blood monocytes, and suggesting that fat mass growth might be linked to inflammatory processes.
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Affiliation(s)
- Cyrile A Curat
- Department of Cardiovascular Physiology, J.W. Goethe University, Theodor-Stern-Kai 7, D 60596 Frankfurt am Main, Germany.
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Stich V, Pelikanova T, Wohl P, Sengenès C, Zakaroff-Girard A, Lafontan M, Berlan M. Activation of alpha2-adrenergic receptors blunts epinephrine-induced lipolysis in subcutaneous adipose tissue during a hyperinsulinemic euglycemic clamp in men. Am J Physiol Endocrinol Metab 2003; 285:E599-607. [PMID: 12900381 DOI: 10.1152/ajpendo.00502.2002] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of this study was to investigate whether hyperinsulinemia modifies adrenergic control of lipolysis, with particular attention paid to the involvement of antilipolytic alpha2-adrenergic receptors (AR). Eight healthy male subjects (age: 23.9 +/- 0.9 yr; body mass index: 23.8 +/- 1.9) were investigated during a 6-h euglycemichyperinsulinemic clamp and in control conditions. Before and during the clamp, the effect of graded perfusions of isoproterenol (0.1 and 1 microM) or epinephrine (1 and 10 microM) on the extracellular glycerol concentration in subcutaneous abdominal adipose tissue was evaluated by using the microdialysis method. Both isoproterenol and epinephrine induced a dose-dependent increase in extracellular glycerol concentration when infused for 60 min through the microdialysis probes before and during hours 3 and 6 of the clamp. The catecholamine-induced increase was significantly lower during the clamp than before it, with the inhibition being more pronounced in hour 6 of the clamp. Isoproterenol (1 microM)-induced lipolysis was reduced by 28 and 44% during hours 3 and 6 of the clamp, respectively, whereas the reduction of epinephrine (100 microM)-induced lipolysis was significantly greater (by 63 and 70%, P < 0.01 and P < 0.04, respectively) during the same time intervals. When epinephrine was infused in combination with 100 microM phentolamine (a nonselective alpha-AR antagonist), the inhibition of epinephrine (10 microM)-induced lipolysis was only of 19 and 40% during hours 3 and 6 of the clamp, respectively. The results demonstrate that, in situ, insulin counteracts the epinephrine-induced lipolysis in adipose tissue. The effect involves 1) reduction of lipolysis stimulation mediated by the beta-adrenergic pathway and 2) the antilipolytic component of epinephrine action mediated by alpha2-ARs.
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Affiliation(s)
- Vladimir Stich
- Department of Sports Medicine, Third Faculty of Medicine, Charles University, Prague, Czech Republic
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Sengenès C, Zakaroff-Girard A, Moulin A, Berlan M, Bouloumié A, Lafontan M, Galitzky J. Natriuretic peptide-dependent lipolysis in fat cells is a primate specificity. Am J Physiol Regul Integr Comp Physiol 2002; 283:R257-65. [PMID: 12069952 DOI: 10.1152/ajpregu.00453.2001] [Citation(s) in RCA: 131] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We have recently demonstrated that natriuretic peptides (NPs), which are known for regulation of blood pressure via membrane guanylyl cyclase (GC) receptors, are lipolytic in human adipose tissue. In this study, we compared the NP control of lipolysis in adipocytes from humans, nonhuman primates (macaques), rodents (rats, mice, hamsters), and nonrodent mammals (rabbits, dogs). Isolated adipocytes from these species were exposed to increasing concentrations of atrial NP (ANP) or isoproterenol (beta-adrenergic agonist). Although isoproterenol was lipolytic in all of the species, ANP only enhanced lipolysis in human and macaque adipocytes. In primate fat cells, NP-induced lipolysis involved a cGMP-dependent pathway. Binding studies and real-time quantitative PCR assays revealed that rat adipocytes expressed a higher density of NP receptors compared with humans but with a different subtype pattern of expression; type-A GC receptors predominate in human fat cells. This was also confirmed by the weak GC-activity stimulation and the reduced cGMP formation under ANP exposure in rat adipocytes compared with human fat cells. In conclusion, NP-induced lipolysis is a primate specificity, and adipocytes from ANP-nonresponsive species present a predominance of "clearance" receptors and very low expression of "biologically active" receptors.
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Affiliation(s)
- Coralie Sengenès
- INSERM U317, Laboratory of Medical and Clinical Pharmacology, Division of Medicine, National Institute of Health and Medical Research, Unité 317, 37 Allées Jules Guesde, 31073 Toulouse Cedex, France.
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Bouloumié A, Lolmède K, Sengenès C, Galitzky J, Lafontan M. Angiogenesis in adipose tissue. Ann Endocrinol (Paris) 2002; 63:91-5. [PMID: 11994668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Affiliation(s)
- A Bouloumié
- INSERM U317, Faculté de médecine, 37, allées Jules Guesde, 31073 Toulouse, France
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Abstract
Adipocyte hypertrophy and hyperplasia together with angiogenesis contribute to the growth of the fat mass. Because changes in the extracellular matrix (ECM) components are often associated with such cellular remodeling, we studied the adipocyte expression of the matrix metalloproteinases (MMPs) 2 and 9, two key enzymes involved in the modulation of ECM. The present study provides the first evidence that human adipose tissue produces and secretes MMP-2 and -9 as shown by gelatin zymography analysis performed on media conditioned by human subcutaneous adipose tissue and human preadipocytes in primary cultures and by reverse transcriptase-polymerase chain reaction (RT-PCR) analysis on transcripts from mature human adipocytes. The further characterization performed on the murine 3T3F442A preadipocyte cell line demonstrates that MMP expression, assessed by RT-PCR and Western blot analysis, as well as activity, assessed by gelatin zymography analysis, increased during the adipocyte differentiation, whereas the expression of tissue inhibitor metalloproteinases 1 and 2 were abolished or not affected, respectively. Finally, preadipocyte treatment with MMP inhibitors such as batimastat and captopril, as well as neutralizing antibodies, markedly decreased adipocyte differentiation as demonstrated by the inhibition in the appearance of lipogenic (triglycerides) and lipolytic (glycerol release and hormone-sensitive lipase expression) markers. These data suggest that MMP-2 and -9 could be important key regulators of adipocyte differentiation. Thus, the adipocyte-derived MMPs might represent a new target for the inhibition of adipose tissue growth.
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Affiliation(s)
- A Bouloumié
- Institut National de la Santé et de la Recherche Médicale U317, Laboratoire de Pharmacologie Médicale et Clinique, Toulouse, France.
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Galitzky J, Sengenès C, Thalamas C, Marques MA, Senard JM, Lafontan M, Berlan M. The lipid-mobilizing effect of atrial natriuretic peptide is unrelated to sympathetic nervous system activation or obesity in young men. J Lipid Res 2001. [DOI: 10.1016/s0022-2275(20)31162-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Galitzky J, Sengenès C, Thalamas C, Marques MA, Senard JM, Lafontan M, Berlan M. The lipid-mobilizing effect of atrial natriuretic peptide is unrelated to sympathetic nervous system activation or obesity in young men. J Lipid Res 2001; 42:536-44. [PMID: 11290825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
We recently demonstrated that natriuretic peptides and especially the atrial natriuretic peptide (ANP) are powerful lipolytic agents on isolated human fat cells. To search for a possible influence of obesity on ANP responsiveness, we compared the lipolytic effects of human ANP (h-ANP) on isolated subcutaneous abdominal adipose tissue (SCAAT) fat cells from young healthy lean and obese men. The lipid-mobilizing effects of an intravenous infusion of h-ANP was studied, as well as various metabolic and cardiovascular parameters that were compared in the same subjects. h-ANP (50 ng/min/kg) was infused iv for 60 min. Microdialysis probes were inserted in SCAAT to measure modifications of the extracellular glycerol concentrations during h-ANP infusion. Spectral analysis of blood pressure and heart rate oscillations that were recorded using digital photoplethysmography were used to assess changes in autonomic nervous system activity. h-ANP induced a marked and similar increase in glycerol and nonesterified fatty acids, and a weak increase in insulin plasma levels in lean and obese men. Plasma norepinephrine concentrations rose similarly during h-ANP infusion in lean and obese men. The effects of h-ANP infusion on the autonomic nervous system were similar in both groups, with an increase in the spectral energy of the low-frequency band of systolic blood pressure variability and a decrease in the spectral energy of the high-frequency band of heart rate. In SCAAT, h-ANP infusion increased extracellular glycerol concentration and decreased blood flow similarly in both groups. The increase in extracellular glycerol observed during h-ANP infusion was not modified when 0.1 mM propranolol was added to the microdialysis probe perfusate to prevent beta-adrenoceptor activation. These data show that ANP is a potent lipolytic hormone independent of the activation of the sympathetic nervous system, and that obesity did not modify the lipid-mobilizing effect of ANP in young obese subjects.
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Affiliation(s)
- J Galitzky
- Department of Clinical and Medical Pharmacology, 37 Allées J. Guesde, 31073 Toulouse Cedex, France
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Sengenès C, Berlan M, De Glisezinski I, Lafontan M, Galitzky J. Natriuretic peptides: a new lipolytic pathway in human adipocytes. FASEB J 2000; 14:1345-51. [PMID: 10877827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Atrial natriuretic peptide (ANP) receptors have been described on rodent adipocytes and expression of their mRNA is found in human adipose tissue. However, no biological effects associated with the stimulation of these receptors have been reported in this tissue. A putative lipolytic effect of natriuretic peptides was investigated in human adipose tissue. On isolated fat cells, ANP and brain natriuretic peptide (BNP) stimulated lipolysis as much as isoproterenol, a nonselective beta-adrenergic receptor agonist, whereas C-type natriuretic peptide (CNP) had the lowest lipolytic effect. In situ microdialysis experiments confirmed the potent lipolytic effect of ANP in abdominal s.c. adipose tissue of healthy subjects. A high level of ANP binding sites was identified in human adipocytes. The potency order defined in lipolysis (ANP > BNP > CNP) and the ANP-induced cGMP production sustained the presence of type A natriuretic peptide receptor in human fat cells. Activation or inhibition of cGMP-inhibited phosphodiesterase (PDE-3B) (using insulin and OPC 3911, respectively) did not modify ANP-induced lipolysis whereas the isoproterenol effect was decreased or increased. Moreover, inhibition of adenylyl cyclase activity (using a mixture of alpha(2)-adrenergic and adenosine A1 agonists receptors) did not change ANP- but suppressed isoproterenol-induced lipolysis. The noninvolvement of the PDE-3B was finally confirmed by measuring its activity under ANP stimulation. Thus, we demonstrate that natriuretic peptides are a new pathway controlling human adipose tissue lipolysis operating via a cGMP-dependent pathway that does not involve PDE-3B inhibition and cAMP production.
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Affiliation(s)
- C Sengenès
- INSERM U 317 and Laboratoire de Pharmacologie Médicale et Clinique, Faculté de Médecine, Toulouse Cedex, France
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Affiliation(s)
- Coralie Sengenès
- INSERM U 317 and Laboratoire de Pharmacologie Médicale et CliniqueFaculté de Médecine Toulouse Cedex 31073 France
| | - Michel Berlan
- INSERM U 317 and Laboratoire de Pharmacologie Médicale et CliniqueFaculté de Médecine Toulouse Cedex 31073 France
| | - Isabelle Glisezinski
- INSERM U 317 and Laboratoire de Pharmacologie Médicale et CliniqueFaculté de Médecine Toulouse Cedex 31073 France
| | - Max Lafontan
- INSERM U 317 and Laboratoire de Pharmacologie Médicale et CliniqueFaculté de Médecine Toulouse Cedex 31073 France
| | - Jean Galitzky
- INSERM U 317 and Laboratoire de Pharmacologie Médicale et CliniqueFaculté de Médecine Toulouse Cedex 31073 France
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