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Gissler MC, Anto-Michel N, Pennig J, Scherrer P, Li X, Marchini T, Pfeiffer K, Härdtner C, Abogunloko T, Mwinyella T, Sol Mitre L, Spiga L, Koentges C, Smolka C, von Elverfeldt D, Hoppe N, Stachon P, Dufner B, Heidt T, Piepenburg S, Hilgendorf I, Bjune JI, Dankel SN, Mellgren G, Seifert G, Eisenhardt SU, Bugger H, von Zur Muhlen C, Bode C, Zirlik A, Wolf D, Willecke F. Genetic Deficiency of TRAF5 Promotes Adipose Tissue Inflammation and Aggravates Diet-Induced Obesity in Mice. Arterioscler Thromb Vasc Biol 2021; 41:2563-2574. [PMID: 34348490 DOI: 10.1161/atvbaha.121.316677] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective: The accumulation of inflammatory leukocytes is a prerequisite of adipose tissue inflammation during cardiometabolic disease. We previously reported that a genetic deficiency of the intracellular signaling adaptor TRAF5 (TNF [tumor necrosis factor] receptor-associated factor 5) accelerates atherosclerosis in mice by increasing inflammatory cell recruitment. Here, we tested the hypothesis that an impairment of TRAF5 signaling modulates adipose tissue inflammation and its metabolic complications in a model of diet-induced obesity in mice. Approach and Results: To induce diet-induced obesity and adipose tissue inflammation, wild-type or Traf5-/- mice consumed a high-fat diet for 18 weeks. Traf5-/- mice showed an increased weight gain, impaired insulin tolerance, and increased fasting blood glucose. Weight of livers and peripheral fat pads was increased in Traf5-/- mice, whereas lean tissue weight and growth were not affected. Flow cytometry of the stromal vascular fraction of visceral adipose tissue from Traf5-/- mice revealed an increase in cytotoxic T cells, CD11c+ macrophages, and increased gene expression of proinflammatory cytokines and chemokines. At the level of cell types, expression of TNF[alpha], MIP (macrophage inflammatory protein)-1[alpha], MCP (monocyte chemoattractant protein)-1, and RANTES (regulated on activation, normal T-cell expressed and secreted) was significantly upregulated in Traf5-deficient adipocytes but not in Traf5-deficient leukocytes from visceral adipose tissue. Finally, Traf5 expression was lower in adipocytes from obese patients and mice and recovered in adipose tissue of obese patients one year after bariatric surgery. Conclusions: We show that a genetic deficiency of TRAF5 in mice aggravates diet-induced obesity and its metabolic derangements by a proinflammatory response in adipocytes. Our data indicate that TRAF5 may promote anti-inflammatory and obesity-preventing signaling events in adipose tissue.
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Affiliation(s)
- Mark Colin Gissler
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Nathaly Anto-Michel
- Department of Cardiology, Medical University of Graz, Austria (N.A.M., H.B., A.Z.)
| | - Jan Pennig
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Philipp Scherrer
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Xiaowei Li
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Timoteo Marchini
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Katharina Pfeiffer
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Carmen Härdtner
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Tijani Abogunloko
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Timothy Mwinyella
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Lucia Sol Mitre
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Lisa Spiga
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Christoph Koentges
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
- Institute of Neuropathology (C.K.), Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Germany
| | - Christian Smolka
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Dominik von Elverfeldt
- Department of Radiology, Medical Physics (D.v.E.), Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Germany
| | - Natalie Hoppe
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Peter Stachon
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Bianca Dufner
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Timo Heidt
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Sven Piepenburg
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Ingo Hilgendorf
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Jan-Inge Bjune
- Center for Diabetes Research (J.-I.B., S.N.D., G.M.), University of Bergen, Norway
- Mohn Nutrition Research Laboratory, Department of Clinical Science (J.-I.B., S.N.D., G.M.), University of Bergen, Norway
- Hormone Laboratory, Department of Medical Biochemistry and Pharmacology, Haukeland University Hospital, Bergen, Norway (J.-I.B., S.N.D., G.M.)
| | - Simon N Dankel
- Center for Diabetes Research (J.-I.B., S.N.D., G.M.), University of Bergen, Norway
- Mohn Nutrition Research Laboratory, Department of Clinical Science (J.-I.B., S.N.D., G.M.), University of Bergen, Norway
- Hormone Laboratory, Department of Medical Biochemistry and Pharmacology, Haukeland University Hospital, Bergen, Norway (J.-I.B., S.N.D., G.M.)
| | - Gunnar Mellgren
- Center for Diabetes Research (J.-I.B., S.N.D., G.M.), University of Bergen, Norway
- Mohn Nutrition Research Laboratory, Department of Clinical Science (J.-I.B., S.N.D., G.M.), University of Bergen, Norway
- Hormone Laboratory, Department of Medical Biochemistry and Pharmacology, Haukeland University Hospital, Bergen, Norway (J.-I.B., S.N.D., G.M.)
| | - Gabriel Seifert
- Department of General and Visceral Surgery (G.S.), Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Germany
| | - Steffen U Eisenhardt
- Department of Plastic and Hand Surgery, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Breisgau, Germany (S.U.E.)
| | - Heiko Bugger
- Department of Cardiology, Medical University of Graz, Austria (N.A.M., H.B., A.Z.)
| | - Constantin von Zur Muhlen
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Christoph Bode
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Andreas Zirlik
- Department of Cardiology, Medical University of Graz, Austria (N.A.M., H.B., A.Z.)
| | - Dennis Wolf
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
| | - Florian Willecke
- Cardiology and Angiology I, University Heart Center, Faculty of Medicine, University of Freiburg, Germany (M.C.G., J.P., P.S., X.L., T. Marchini, K.P., C.H., T.A., T. Mwinyella, L.S.M., L.S., C.K., C.S., N.H., P.S., B.D., T.H., S.P., I.H., C.v.z.M., C.B., D.W., F.W.)
- Clinic for General and Interventional Cardiology/Angiology, Herz- und Diabeteszentrum NRW, Ruhr-Universität Bochum, Bad Oeynhausen, Germany (F.W.)
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Abstract
Pentraxin 3 (PTX3) is a soluble pattern recognition receptor playing an important role in immune response and inflammation. Lipopolysaccharide (LPS) stimulation can significantly induce PTX3 expression and secretion in adipocytes. Appropriate regulation of PTX3 secretion is critical for inflammatory homeostasis. Using chemical inhibitors of conventional and unconventional protein secretion, we explored the mechanisms that control LPS-stimulated PTX3 secretion in 3T3-L1 adipocytes. Inhibiting the conventional protein secretion blocked LPS-stimulated PTX3 secretion, resulting in cellular PTX3 accumulation in adipocytes. We also detected PTX3 in exosomes from LPS-treated adipocytes; inhibiting exosome trafficking attenuated PTX3 secretion. However, only 4.3% of secreted PTX3 was detected in exosomes compared to 95.7% in the non-exosomal fractions. The fractionation of isolated exosomes by the iodixanol density gradient centrifugation confirmed that a small portion of secreted PTX3 overlapped with exosomal markers in small extracellular-vesicle fractions. We conclude that PTX3 is secreted mainly through conventional protein secretion, and a small percentage of PTX3 is released in exosomes from LPS-stimulated adipocytes.
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Affiliation(s)
- Te-Yueh Lin
- Department of Food Science and Nutrition, University of Minnesota, Twin Cities, Minnesota, USA
| | - Hong Guo
- Department of Food Science and Nutrition, University of Minnesota, Twin Cities, Minnesota, USA
| | - Xiaoli Chen
- Department of Food Science and Nutrition, University of Minnesota, Twin Cities, Minnesota, USA
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Petkevicius K, Bidault G, Virtue S, Newland SA, Dale M, Dugourd A, Saez-Rodriguez J, Mallat Z, Vidal-Puig A. Macrophage beta2-adrenergic receptor is dispensable for the adipose tissue inflammation and function. Mol Metab 2021; 48:101220. [PMID: 33774223 PMCID: PMC8086137 DOI: 10.1016/j.molmet.2021.101220] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 03/18/2021] [Accepted: 03/20/2021] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVE Neuroimmune interactions between the sympathetic nervous system (SNS) and macrophages are required for the homeostasis of multiple tissues, including the adipose tissue. It has been proposed that the SNS maintains adipose tissue macrophages (ATMs) in an anti-inflammatory state via direct norepinephrine (NE) signaling to macrophages. This study aimed to investigate the physiological importance of this paradigm by utilizing a mouse model in which the adrenergic signaling from the SNS to macrophages, but not to other adipose tissue cells, was disrupted. METHODS We generated a macrophage-specific B2AR knockout mouse (Adrb2ΔLyz2) by crossing Adrb2fl/fl and Lyz2Cre/+ mice. We have previously shown that macrophages isolated from Adrb2ΔLyz2 animals do not respond to NE stimulation in vitro. Herein we performed a metabolic phenotyping of Adrb2ΔLyz2 mice on either chow or high-fat diet (HFD). We also assessed the adipose tissue function of Adrb2ΔLyz2 animals during fasting and cold exposure. Finally, we transplanted Adrb2ΔLyz2 bone marrow to low-density lipoprotein receptor (LDLR) knockout mice and investigated the development of atherosclerosis during Western diet feeding. RESULTS We demonstrated that SNS-associated ATMs have a transcriptional profile indicative of activated beta-2 adrenergic receptor (B2AR), the main adrenergic receptor isoform in myeloid cells. However, Adrb2ΔLyz2 mice have unaltered energy balance on a chow or HFD. Furthermore, Adrb2ΔLyz2 mice show similar levels of adipose tissue inflammation and function during feeding, fasting, or cold exposure, and develop insulin resistance during HFD at the same rate as controls. Finally, macrophage-specific B2AR deletion does not affect the development of atherosclerosis on an LDL receptor-null genetic background. CONCLUSIONS Overall, our data suggest that the SNS does not directly modulate the phenotype of adipose tissue macrophages in either lean mice or mouse models of cardiometabolic disease. Instead, sympathetic nerve activity exerts an indirect effect on adipose tissue macrophages through the modulation of adipocyte function.
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MESH Headings
- Adipocytes/metabolism
- Adipose Tissue, White/metabolism
- Animals
- Atherosclerosis/complications
- Atherosclerosis/genetics
- Atherosclerosis/metabolism
- Bone Marrow Transplantation/methods
- Cells, Cultured
- Diet, High-Fat/adverse effects
- Diet, Western/adverse effects
- Disease Models, Animal
- Female
- Insulin Resistance/genetics
- Macrophages/metabolism
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Obesity/complications
- Obesity/genetics
- Obesity/metabolism
- Panniculitis/genetics
- Panniculitis/metabolism
- Phenotype
- Receptors, Adrenergic, beta-2/genetics
- Receptors, Adrenergic, beta-2/metabolism
- Signal Transduction/genetics
- Sympathetic Nervous System/metabolism
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Affiliation(s)
- Kasparas Petkevicius
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, MDU MRC, Cambridge, United Kingdom.
| | - Guillaume Bidault
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, MDU MRC, Cambridge, United Kingdom
| | - Sam Virtue
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, MDU MRC, Cambridge, United Kingdom
| | - Stephen A Newland
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Martin Dale
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, MDU MRC, Cambridge, United Kingdom
| | - Aurelien Dugourd
- Joint Research Centre for Computational Biomedicine, Faculty of Medicine, RWTH Aachen University, Aachen, Germany; Institute for Computational Biomedicine, Heidelberg University, Faculty of Medicine & Heidelberg University Hospital, Heidelberg, Germany
| | - Julio Saez-Rodriguez
- Joint Research Centre for Computational Biomedicine, Faculty of Medicine, RWTH Aachen University, Aachen, Germany; Institute for Computational Biomedicine, Heidelberg University, Faculty of Medicine & Heidelberg University Hospital, Heidelberg, Germany
| | - Ziad Mallat
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Antonio Vidal-Puig
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, MDU MRC, Cambridge, United Kingdom; Wellcome Trust Sanger Institute, Hinxton, United Kingdom.
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Sanchez-Infantes D, Stephens JM. Adipocyte Oncostatin Receptor Regulates Adipose Tissue Homeostasis and Inflammation. Front Immunol 2021; 11:612013. [PMID: 33854494 PMCID: PMC8039456 DOI: 10.3389/fimmu.2020.612013] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 12/31/2020] [Indexed: 01/05/2023] Open
Abstract
Adipocytes are the largest cell type in terms of volume, but not number, in adipose tissue. Adipocytes are prominent contributors to systemic metabolic health. Obesity, defined by excess adipose tissue (AT), is recognized as a low-grade chronic inflammatory state. Cytokines are inflammatory mediators that are produced in adipose tissue (AT) and function in both AT homeostatic as well as pathological conditions. AT inflammation is associated with systemic metabolic dysfunction and obesity-associated infiltration and proliferation of immune cells occurs in a variety of fat depots in mice and humans. AT immune cells secrete a variety of chemokines and cytokines that act in a paracrine manner on adjacent adipocytes. TNFα, IL-6, and MCP-1, are well studied mediators of AT inflammation. Oncostatin M (OSM) is another proinflammatory cytokine that is elevated in AT in human obesity, and its specific receptor (OSMRβ) is also induced in conditions of obesity and insulin resistance. OSM production and paracrine signaling in AT regulates adipogenesis and the functions of AT. This review summarizes the roles of the oncostatin M receptor (OSMRβ) as a modulator of adipocyte development and function its contributions to immunological adaptations in AT in metabolic disease states.
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Affiliation(s)
- David Sanchez-Infantes
- Department of Endocrinology and Nutrition, Germans Trias i Pujol Research Institute, Barcelona, Spain
- Department of Basic Sciences of Health, Area of Biochemistry and Molecular Biology, Universidad Rey Juan Carlos, Alcorcon, Spain
| | - Jacqueline M. Stephens
- Department of Biological Sciences and Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA, United States
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5
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Moruzzi M, Klöting N, Blüher M, Martinelli I, Tayebati SK, Gabrielli MG, Roy P, Micioni Di Bonaventura MV, Cifani C, Lupidi G, Amenta F, Tomassoni D. Tart Cherry Juice and Seeds Affect Pro-Inflammatory Markers in Visceral Adipose Tissue of High-Fat Diet Obese Rats. Molecules 2021; 26:1403. [PMID: 33807712 PMCID: PMC7961347 DOI: 10.3390/molecules26051403] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 02/03/2021] [Accepted: 02/25/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Tart cherries (Prunus cerasus L.) are a rich source of anthocyanins. They are phytochemical flavonoids found in red and blue fruits, and vegetables that can reduce hyperlipidemia. Visceral Adipose Tissue (VAT) has emerged as a major player in driving obesity-related inflammatory response. METHODS This study has investigated the potential positive effects of tart cherries on rats with Diet-Induced Obesity (DIO). In particular, the inflammatory status in retroperitoneal (RPW) and perigonadal (PGW) adipose tissue were studied. Rats were fed ad libitum for 17 weeks with a hypercaloric diet with the supplementation of tart cherries seeds powder (DS) and seeds powder plus tart cherries juice containing 1mg of anthocyanins (DJS). In RPW and PGW, expression of CRP, IL-1 β, TNF-α, CCL2 and CD36, were measured by qRT-PCR, Western blot and immunohistochemistry techniques. RESULTS No differences in the weight of RPW and PGW animals were found between DS and DJS groups compared to DIO rats. However, an increase of inflammatory markers was observed in DIO group in comparison with control lean rats. A modulation of these markers was evident upon tart cherry supplementation. CONCLUSION Study results suggest that tart cherry enriched-diet did not modify the accumulation of visceral fat, but it decreased inflammatory markers in both tissues. Therefore, this supplementation could be useful, in combination with healthy lifestyles, to modify adipose tissue cell metabolism limiting-obesity related organ damage.
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Affiliation(s)
- Michele Moruzzi
- School of Pharmacy, University of Camerino, 62032 Camerino, Italy; (M.M.); (I.M.); (S.K.T.); (M.V.M.D.B.); (C.C.); (G.L.); (F.A.)
| | - Nora Klöting
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI-MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital Leipzig, 04103 Leipzig, Germany; (N.K.); (M.B.)
| | - Matthias Blüher
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI-MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital Leipzig, 04103 Leipzig, Germany; (N.K.); (M.B.)
| | - Ilenia Martinelli
- School of Pharmacy, University of Camerino, 62032 Camerino, Italy; (M.M.); (I.M.); (S.K.T.); (M.V.M.D.B.); (C.C.); (G.L.); (F.A.)
- Institute of Metabolic and Cardiovascular Diseases (I2MC), Institut National de la Santé et de la Recherche Médicale (INSERM), Université de Toulouse, 31432 Toulouse, France
| | - Seyed Khosrow Tayebati
- School of Pharmacy, University of Camerino, 62032 Camerino, Italy; (M.M.); (I.M.); (S.K.T.); (M.V.M.D.B.); (C.C.); (G.L.); (F.A.)
| | - Maria Gabriella Gabrielli
- School of Biosciences and Veterinary Medicine, University of Camerino, 62032 Camerino, Italy; (M.G.G.); (P.R.)
| | - Proshanta Roy
- School of Biosciences and Veterinary Medicine, University of Camerino, 62032 Camerino, Italy; (M.G.G.); (P.R.)
| | | | - Carlo Cifani
- School of Pharmacy, University of Camerino, 62032 Camerino, Italy; (M.M.); (I.M.); (S.K.T.); (M.V.M.D.B.); (C.C.); (G.L.); (F.A.)
| | - Giulio Lupidi
- School of Pharmacy, University of Camerino, 62032 Camerino, Italy; (M.M.); (I.M.); (S.K.T.); (M.V.M.D.B.); (C.C.); (G.L.); (F.A.)
| | - Francesco Amenta
- School of Pharmacy, University of Camerino, 62032 Camerino, Italy; (M.M.); (I.M.); (S.K.T.); (M.V.M.D.B.); (C.C.); (G.L.); (F.A.)
| | - Daniele Tomassoni
- School of Biosciences and Veterinary Medicine, University of Camerino, 62032 Camerino, Italy; (M.G.G.); (P.R.)
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6
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Wang X, Zhao Y, Zhou D, Tian Y, Feng G, Lu Z. Gab2 deficiency suppresses high-fat diet-induced obesity by reducing adipose tissue inflammation and increasing brown adipose function in mice. Cell Death Dis 2021; 12:212. [PMID: 33637697 PMCID: PMC7910586 DOI: 10.1038/s41419-021-03519-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 02/07/2021] [Accepted: 02/09/2021] [Indexed: 12/13/2022]
Abstract
Obesity is caused by a long-term imbalance between energy intake and consumption and is regulated by multiple signals. This study investigated the effect of signaling scaffolding protein Gab2 on obesity and its relevant regulation mechanism. Gab2 knockout (KO) and wild-type (WT) mice were fed with a standard diet (SD) or high-fat diet (HFD) for 12 weeks. The results showed that the a high-fat diet-induced Gab2 expression in adipose tissues, but deletion of Gab2 attenuated weight gain and improved glucose tolerance in mice fed with a high-fat diet. White adipose tissue and systemic inflammations were reduced in HFD-fed Gab2 deficiency mice. Gab2 deficiency increased the expression of Ucp1 and other thermogenic genes in brown adipose tissue. Furthermore, the regulation of Gab2 on the mature differentiation and function of adipocytes was investigated in vitro using primary or immortalized brown preadipocytes. The expression of brown fat-selective genes was found to be elevated in differentiated adipocytes without Gab2. The mechanism of Gab2 regulating Ucp1 expression in brown adipocytes involved with its downstream PI3K (p85)-Akt-FoxO1 signaling pathway. Our research suggests that deletion of Gab2 suppresses diet-induced obesity by multiple pathways and Gab2 may be a novel therapeutic target for the treatment of obesity and associated complications.
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MESH Headings
- Adaptor Proteins, Signal Transducing/deficiency
- Adaptor Proteins, Signal Transducing/genetics
- Adipose Tissue, Brown/metabolism
- Adipose Tissue, Brown/physiopathology
- Adipose Tissue, White/metabolism
- Adipose Tissue, White/physiopathology
- Adiposity
- Animals
- Blood Glucose/metabolism
- Cell Line
- Class Ia Phosphatidylinositol 3-Kinase/metabolism
- Diet, High-Fat
- Disease Models, Animal
- Energy Metabolism
- Forkhead Box Protein O1/metabolism
- Insulin Resistance
- Male
- Mice, Inbred C57BL
- Mice, Knockout
- Obesity/genetics
- Obesity/metabolism
- Obesity/physiopathology
- Obesity/prevention & control
- Panniculitis/genetics
- Panniculitis/metabolism
- Panniculitis/physiopathology
- Panniculitis/prevention & control
- Proto-Oncogene Proteins c-akt/metabolism
- Signal Transduction
- Uncoupling Protein 1/metabolism
- Weight Gain
- Mice
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Affiliation(s)
- Xinhui Wang
- School of Pharmaceutical Sciences, State Key Laboratory of Cellular Stress Biology, Xiamen University, 361005, Xiamen, Fujian, China
| | - Yinan Zhao
- School of Pharmaceutical Sciences, State Key Laboratory of Cellular Stress Biology, Xiamen University, 361005, Xiamen, Fujian, China
| | - Dekun Zhou
- School of Pharmaceutical Sciences, State Key Laboratory of Cellular Stress Biology, Xiamen University, 361005, Xiamen, Fujian, China
| | - Yingpu Tian
- School of Pharmaceutical Sciences, State Key Laboratory of Cellular Stress Biology, Xiamen University, 361005, Xiamen, Fujian, China
| | - Gensheng Feng
- Department of Pathology, Division of Biological Sciences, University of California at San Diego, La Jolla, CA, 92093, USA
| | - Zhongxian Lu
- School of Pharmaceutical Sciences, State Key Laboratory of Cellular Stress Biology, Xiamen University, 361005, Xiamen, Fujian, China.
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7
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Misiou A, Garmey JC, Hensien JM, Harmon DB, Osinski V, McSkimming C, Marshall MA, Fischer JW, Grandoch M, McNamara CA. Helix-Loop-Helix Factor Id3 (Inhibitor of Differentiation 3): A Novel Regulator of Hyaluronan-Mediated Adipose Tissue Inflammation. Arterioscler Thromb Vasc Biol 2021; 41:796-807. [PMID: 33380173 PMCID: PMC8105274 DOI: 10.1161/atvbaha.120.315588] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
OBJECTIVE The aim of this study was to unravel mechanisms whereby deficiency of the transcription factor Id3 (inhibitor of differentiation 3) leads to metabolic dysfunction in visceral obesity. We investigated the impact of loss of Id3 on hyaluronic acid (HA) production by the 3 HAS isoenzymes (HA synthases; -1, -2, and -3) and on obesity-induced adipose tissue (AT) accumulation of proinflammatory B cells. Approach and Results: Male Id3-/- mice and respective wild-type littermate controls were fed a 60% high-fat diet for 4 weeks. An increase in inflammatory B2 cells was detected in Id3-/- epididymal AT. HA accumulated in epididymal AT of high-fat diet-fed Id3-/- mice and circulating levels of HA were elevated. Has2 mRNA expression was increased in epididymal AT of Id3-/- mice. Luciferase promoter assays showed that Id3 suppressed Has2 promoter activity, while loss of Id3 stimulated Has2 promoter activity. Functionally, HA strongly promoted B2 cell adhesion in the AT and on cultured vascular smooth muscle cells of Id3-/- mice, an effect sensitive to hyaluronidase. CONCLUSIONS Our data demonstrate that loss of Id3 increases Has2 expression in the epididymal AT, thereby promoting HA accumulation. In turn, elevated HA content promotes HA-dependent binding of B2 cells and an increase in the B2 cells in the AT, which contributes to AT inflammation.
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MESH Headings
- Adipose Tissue/immunology
- Adipose Tissue/metabolism
- Animals
- B-Lymphocytes/immunology
- B-Lymphocytes/metabolism
- Cell Adhesion
- Cells, Cultured
- Coculture Techniques
- Diet, High-Fat
- Disease Models, Animal
- Hyaluronan Synthases/genetics
- Hyaluronan Synthases/metabolism
- Hyaluronic Acid/biosynthesis
- Inhibitor of Differentiation Proteins/genetics
- Inhibitor of Differentiation Proteins/metabolism
- Macrophages/immunology
- Macrophages/metabolism
- Male
- Mice, Inbred C57BL
- Mice, Knockout
- Muscle, Smooth, Vascular/immunology
- Muscle, Smooth, Vascular/metabolism
- Myocytes, Smooth Muscle/immunology
- Myocytes, Smooth Muscle/metabolism
- Panniculitis/genetics
- Panniculitis/immunology
- Panniculitis/metabolism
- Phenotype
- Signal Transduction
- Up-Regulation
- Mice
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Affiliation(s)
- Angelina Misiou
- Institute of Pharmacology and Clinical Pharmacology, Medical Faculty, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
| | - James C. Garmey
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, USA
| | - Jack M. Hensien
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, USA
| | - Daniel B. Harmon
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, USA
| | - Victoria Osinski
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, USA
| | - Chantel McSkimming
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, USA
| | - Melissa A. Marshall
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, USA
| | - Jens W. Fischer
- Institute of Pharmacology and Clinical Pharmacology, Medical Faculty, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
| | - Maria Grandoch
- Institute of Pharmacology and Clinical Pharmacology, Medical Faculty, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
| | - Coleen A. McNamara
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, USA
- Department of Medicine, Division of Cardiovascular Medicine, University of Virginia, Charlottesville, VA, USA
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8
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Bulut GB, Alencar GF, Owsiany KM, Nguyen AT, Karnewar S, Haskins RM, Waller LK, Cherepanova OA, Deaton RA, Shankman LS, Keller SR, Owens GK. KLF4 (Kruppel-Like Factor 4)-Dependent Perivascular Plasticity Contributes to Adipose Tissue inflammation. Arterioscler Thromb Vasc Biol 2021; 41:284-301. [PMID: 33054397 PMCID: PMC7769966 DOI: 10.1161/atvbaha.120.314703] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Smooth muscle cells and pericytes display remarkable plasticity during injury and disease progression. Here, we tested the hypothesis that perivascular cells give rise to Klf4-dependent macrophage-like cells that augment adipose tissue (AT) inflammation and metabolic dysfunction associated with diet-induced obesity (DIO). Approach and Results: Using Myh11-CreERT2 eYFP (enhanced yellow fluorescent protein) mice and flow cytometry of the stromovascular fraction of epididymal AT, we observed a large fraction of smooth muscle cells and pericytes lineage traced eYFP+ cells expressing macrophage markers. Subsequent single-cell RNA sequencing, however, showed that the majority of these cells had no detectable eYFP transcript. Further exploration revealed that intraperitoneal injection of tamoxifen in peanut oil, used for generating conditional knockout or reporter mice in thousands of previous studies, resulted in large increase in the autofluorescence and false identification of macrophages within epididymal AT as being eYFP+; and unintended proinflammatory consequences. Using newly generated Myh11-DreERT2tdTomato mice given oral tamoxifen, we virtually eliminated the problem with autofluorescence and identified 8 perivascular cell dominated clusters, half of which were altered upon DIO. Given that perivascular cell KLF4 (kruppel-like factor 4) can have beneficial or detrimental effects, we tested its role in obesity-associated AT inflammation. While smooth muscle cells and pericytes-specific Klf4 knockout (smooth muscle cells and pericytes Klf4Δ/Δ) mice were not protected from DIO, they displayed improved glucose tolerance upon DIO, and showed marked decreases in proinflammatory macrophages and increases in LYVE1+ lymphatic endothelial cells in the epididymal AT. CONCLUSIONS Perivascular cells within the AT microvasculature dynamically respond to DIO and modulate tissue inflammation and metabolism in a KLF4-dependent manner.
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Affiliation(s)
- Gamze B. Bulut
- The Robert M. Berne Cardiovascular Research Center, University of Virginia
| | - Gabriel F. Alencar
- The Robert M. Berne Cardiovascular Research Center, University of Virginia
| | | | - Anh T. Nguyen
- The Robert M. Berne Cardiovascular Research Center, University of Virginia
| | - Santosh Karnewar
- The Robert M. Berne Cardiovascular Research Center, University of Virginia
| | - Ryan M. Haskins
- The Robert M. Berne Cardiovascular Research Center, University of Virginia
| | - Lillian K. Waller
- The Robert M. Berne Cardiovascular Research Center, University of Virginia
| | - Olga A. Cherepanova
- Cardiovascular and Metabolic Sciences Lerner Research Institute, Cleveland Clinic
| | - Rebecca A. Deaton
- The Robert M. Berne Cardiovascular Research Center, University of Virginia
| | - Laura S. Shankman
- The Robert M. Berne Cardiovascular Research Center, University of Virginia
| | - Susanna R. Keller
- Department of Medicine-Division of Endocrinology and Metabolism, University of Virginia
| | - Gary K. Owens
- The Robert M. Berne Cardiovascular Research Center, University of Virginia
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9
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Pujadas G, Varin EM, Baggio LL, Mulvihill EE, Bang KWA, Koehler JA, Matthews D, Drucker DJ. The gut hormone receptor GIPR links energy availability to the control of hematopoiesis. Mol Metab 2020; 39:101008. [PMID: 32389828 PMCID: PMC7283165 DOI: 10.1016/j.molmet.2020.101008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 04/27/2020] [Accepted: 04/28/2020] [Indexed: 12/21/2022] Open
Abstract
OBJECTIVE Glucose-dependent insulinotropic polypeptide (GIP) conveys information from ingested nutrients to peripheral tissues, signaling energy availability. The GIP Receptor (GIPR) is also expressed in the bone marrow, notably in cells of the myeloid lineage. However, the importance of gain and loss of GIPR signaling for diverse hematopoietic responses remains unclear. METHODS We assessed the expression of the Gipr in bone marrow (BM) lineages and examined functional roles for the GIPR in control of hematopoiesis. Bone marrow responses were studied in (i) mice fed regular or energy-rich diets, (ii) mice treated with hematopoietic stressors including acute 5-fluorouracil (5-FU), pamsaccharide (LPS), and Pam3CysSerLys4 (Pam3CSK4), with or without pharmacological administration of a GIPR agonist, and (iii) mice with global (Gipr-/-) or selective deletion of the GIPR (GiprTie2-/-) with and without bone marrow transplantation (BMT). RESULTS Gipr is expressed within T cells, myeloid cells, and myeloid precursors; however, these cell populations were not different in peripheral blood, spleen, or BM of Gipr-/- and GiprTie2-/- mice. Nevertheless, gain and loss of function studies revealed that GIPR signaling controls the expression of BM Toll-like receptor (TLR) and Notch-related genes regulating hematopoiesis. Loss of the BM GIPR attenuates the extent of adipose tissue inflammation and dysregulates the hematopoietic response to BMT. GIPR agonism modified BM gene expression profiles following 5-FU and Pam3CSK4 whereas loss of the Gipr altered the hematopoietic responses to energy excess, two TLR ligands, and 5-FU. However, the magnitude of the cellular changes in hematopoiesis in response to gain or loss of GIPR signaling was relatively modest. CONCLUSION These studies identify a functional gut hormone-BM axis positioned for the transduction of signals linking nutrient availability to the control of TLR and Notch genes regulating hematopoiesis. Nevertheless, stimulation or loss of GIPR signaling has minimal impact on basal hematopoiesis or the physiological response to hematopoietic stress.
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Affiliation(s)
- Gemma Pujadas
- Lunenfeld-Tanenbaum Research Institute, Mt. Sinai Hospital, University of Toronto, ON, M5G 1X5, Canada
| | - Elodie M Varin
- Lunenfeld-Tanenbaum Research Institute, Mt. Sinai Hospital, University of Toronto, ON, M5G 1X5, Canada
| | - Laurie L Baggio
- Lunenfeld-Tanenbaum Research Institute, Mt. Sinai Hospital, University of Toronto, ON, M5G 1X5, Canada
| | - Erin E Mulvihill
- Lunenfeld-Tanenbaum Research Institute, Mt. Sinai Hospital, University of Toronto, ON, M5G 1X5, Canada
| | - K W Annie Bang
- Lunenfeld-Tanenbaum Research Institute, Mt. Sinai Hospital, University of Toronto, ON, M5G 1X5, Canada
| | - Jacqueline A Koehler
- Lunenfeld-Tanenbaum Research Institute, Mt. Sinai Hospital, University of Toronto, ON, M5G 1X5, Canada
| | - Dianne Matthews
- Lunenfeld-Tanenbaum Research Institute, Mt. Sinai Hospital, University of Toronto, ON, M5G 1X5, Canada
| | - Daniel J Drucker
- Lunenfeld-Tanenbaum Research Institute, Mt. Sinai Hospital, University of Toronto, ON, M5G 1X5, Canada.
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10
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Lee SM, Lee J, Kang E, Kim HL, Hwang GS, Jung J. Lipidomic analysis reveals therapeutic effects of Yijin-Tang on high-fat/high-cholesterol diet-induced obese mice. Phytomedicine 2020; 74:152936. [PMID: 31088684 DOI: 10.1016/j.phymed.2019.152936] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 04/16/2019] [Accepted: 04/19/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND In Traditional Korean and Chinese medicine, the herbal remedy Yijin (Erchen)-Tang (YJT) is widely used to treat obesity-related disorders, and its therapeutic potential has been demonstrated in numerous studies. However, the systemic effect of YJT on obesity status and change of lipid metabolism by YJT still remains unknown. PURPOSE This study aimed to investigate the therapeutic mechanism of the YJT on obesity by using lipidomics. METHODS To evaluate the effects of treatment with YJT on obesity, C57BL/6 J mice were fed a high-fat and high-cholesterol (HFHC, 40% fat and 1% cholesterol) diet for 8 weeks and treated them with YJT for an additional 6 weeks. We then performed untargeted lipidomic analysis using ultra-performance liquid chromatography/quadrupole-time-of-flight mass spectrometry mass spectroscopy coupled with multivariate statistical analysis. RESULTS YJT ameliorated obesity induced systemic inflammation and improved insulin resistance. Additionally, YJT protected against HFHC-diet-induced hepatic inflammation. To explore specific changes in lipid metabolism associated with the therapeutic effects of YJT, we performed untargeted lipid profiling of the plasma. Partial least squares-discriminant analysis (PLS-DA) score plots showed that YJT altered the lipid metabolic pattern of HFHC mice. In particular, ceramides and triglycerides with saturated fatty acids and monounsaturated fatty acids were significantly changed by YJT, which were significantly associated with insulin resistance, the AGE-RAGE signaling pathway in diabetic complications and adipocytokine signaling pathway in pathway enrichment analysis. Thus, we analyzed the changes in adipocytes and adipokine caused by YJT, and confirmed that YJT alleviated adipocytes inflammation and macrophage infiltration, and reversed HFHC-induced alterations in leptin and adiponectin levels in adipose tissue and plasma. CONCLUSION These data suggest that YJT ameliorates obesity-induced systemic inflammation and insulin resistance by regulating lipid metabolism, and demonstrated that lipidomic profiling is a useful method to investigate the therapeutic effects of herbal decoctions in traditional Korean and Chinese medicine.
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Affiliation(s)
- So Min Lee
- Clinical Research Division, Korea Institute of Oriental Medicine, 1672 Yuseong-daero, Daejeon 34054, Republic of Korea.
| | - Jueun Lee
- Integrated Metabolomics Research Group, Western Seoul Center, Korea Basic Science Institute, Seoul 03760, Republic of Korea.
| | - Eunjung Kang
- Integrated Metabolomics Research Group, Western Seoul Center, Korea Basic Science Institute, Seoul 03760, Republic of Korea; Department of Chemistry and Nano Science, Ewha Women's University, Seoul 03766, Republic of Korea.
| | - Hye-Lin Kim
- Clinical Research Division, Korea Institute of Oriental Medicine, 1672 Yuseong-daero, Daejeon 34054, Republic of Korea.
| | - Geum-Sook Hwang
- Integrated Metabolomics Research Group, Western Seoul Center, Korea Basic Science Institute, Seoul 03760, Republic of Korea; Department of Chemistry and Nano Science, Ewha Women's University, Seoul 03766, Republic of Korea.
| | - Jeeyoun Jung
- Clinical Research Division, Korea Institute of Oriental Medicine, 1672 Yuseong-daero, Daejeon 34054, Republic of Korea.
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11
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Wu KKL, Cheung SWM, Cheng KKY. NLRP3 Inflammasome Activation in Adipose Tissues and Its Implications on Metabolic Diseases. Int J Mol Sci 2020; 21:E4184. [PMID: 32545355 PMCID: PMC7312293 DOI: 10.3390/ijms21114184] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/05/2020] [Accepted: 06/09/2020] [Indexed: 02/06/2023] Open
Abstract
Adipose tissue is an active endocrine and immune organ that controls systemic immunometabolism via multiple pathways. Diverse immune cell populations reside in adipose tissue, and their composition and immune responses vary with nutritional and environmental conditions. Adipose tissue dysfunction, characterized by sterile low-grade chronic inflammation and excessive immune cell infiltration, is a hallmark of obesity, as well as an important link to cardiometabolic diseases. Amongst the pro-inflammatory factors secreted by the dysfunctional adipose tissue, interleukin (IL)-1β, induced by the NLR family pyrin domain-containing 3 (NLRP3) inflammasome, not only impairs peripheral insulin sensitivity, but it also interferes with the endocrine and immune functions of adipose tissue in a paracrine manner. Human studies indicated that NLRP3 activity in adipose tissues positively correlates with obesity and its metabolic complications, and treatment with the IL-1β antibody improves glycaemia control in type 2 diabetic patients. In mouse models, genetic or pharmacological inhibition of NLRP3 activation pathways or IL-1β prevents adipose tissue dysfunction, including inflammation, fibrosis, defective lipid handling and adipogenesis, which in turn alleviates obesity and its related metabolic disorders. In this review, we summarize both the negative and positive regulators of NLRP3 inflammasome activation, and its pathophysiological consequences on immunometabolism. We also discuss the potential therapeutic approaches to targeting adipose tissue inflammasome for the treatment of obesity and its related metabolic disorders.
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Affiliation(s)
| | | | - Kenneth King-Yip Cheng
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, China; (K.K.-L.W.); (S.W.-M.C.)
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12
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Skurski J, Penniman CM, Geesala R, Dixit G, Pulipati P, Bhardwaj G, Meyerholz DK, Issuree PD, O'Neill BT, Maretzky T. Loss of iRhom2 accelerates fat gain and insulin resistance in diet-induced obesity despite reduced adipose tissue inflammation. Metabolism 2020; 106:154194. [PMID: 32135161 DOI: 10.1016/j.metabol.2020.154194] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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: 11/08/2019] [Revised: 02/24/2020] [Accepted: 02/28/2020] [Indexed: 12/31/2022]
Abstract
BACKGROUND Low-grade inflammation and metabolic dysregulation are common comorbidities of obesity, both of which are associated with alterations in iRhom2-regulated pro-inflammatory cytokine and epidermal growth factor receptor (EGFR) ligand signaling. OBJECTIVE Our objective was to determine the role of iRhom2 in the regulation of low-grade inflammation and metabolic dysregulation in a murine model of diet-induced obesity. METHODS Wild type (WT) and iRhom2-deficient mice were fed normal chow (NC) or a high-fat diet (HFD) starting at 5 weeks of age for up to 33 weeks. Body composition, glucose and insulin tolerance, feeding behavior, and indirect calorimetry were measured at defined time points. Adipose tissue cytokine expression and inflammatory lesions known as crown-like structures (CLS) were analyzed at the end-point of the study. RESULTS iRhom2-deficient mice show accelerated fat gain on a HFD, accompanied by insulin resistance. Indirect calorimetry did not demonstrate changes in energy expenditure or food intake, but locomotor activity was significantly reduced in HFD iRhom2-deficient mice. Interestingly, CLS, macrophage infiltration, and tumor necrosis factor (TNF) production were decreased in adipose tissue from HFD iRhom2-deficient mice, but circulating cytokines were unchanged. In inguinal and perigonadal fat, the EGFR ligand amphiregulin was markedly induced in HFD controls but completely prevented in iRhom2-deficient mice, suggesting a potentially dominant role of EGFR-dependent mechanisms over TNF in the modulation of insulin sensitivity. CONCLUSIONS This study elucidates a novel role for iRhom2 as an immuno-metabolic regulator that affects adipose tissue inflammation independent of insulin resistance.
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Affiliation(s)
- Joseph Skurski
- Inflammation Program, Roy J. and Lucille A. Carver College of Medicine University of Iowa, Iowa City, IA, USA; Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine University of Iowa, Iowa City, IA, USA; Immunology Graduate Program, Iowa City, IA, USA
| | - Christie M Penniman
- Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine University of Iowa, Iowa City, IA, USA; Division of Endocrinology and Metabolism, Fraternal Order of Eagles Diabetes Research Center, Roy J. and Lucille A. Carver College of Medicine University of Iowa, Iowa City, IA, USA
| | - Ramasatyaveni Geesala
- Inflammation Program, Roy J. and Lucille A. Carver College of Medicine University of Iowa, Iowa City, IA, USA; Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine University of Iowa, Iowa City, IA, USA
| | - Garima Dixit
- Inflammation Program, Roy J. and Lucille A. Carver College of Medicine University of Iowa, Iowa City, IA, USA; Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine University of Iowa, Iowa City, IA, USA
| | - Priyanjali Pulipati
- Inflammation Program, Roy J. and Lucille A. Carver College of Medicine University of Iowa, Iowa City, IA, USA; Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine University of Iowa, Iowa City, IA, USA
| | - Gourav Bhardwaj
- Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine University of Iowa, Iowa City, IA, USA; Division of Endocrinology and Metabolism, Fraternal Order of Eagles Diabetes Research Center, Roy J. and Lucille A. Carver College of Medicine University of Iowa, Iowa City, IA, USA
| | - David K Meyerholz
- Department of Pathology, Roy J. and Lucille A. Carver College of Medicine, Iowa City, IA, USA
| | - Priya D Issuree
- Inflammation Program, Roy J. and Lucille A. Carver College of Medicine University of Iowa, Iowa City, IA, USA; Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine University of Iowa, Iowa City, IA, USA
| | - Brian T O'Neill
- Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine University of Iowa, Iowa City, IA, USA; Division of Endocrinology and Metabolism, Fraternal Order of Eagles Diabetes Research Center, Roy J. and Lucille A. Carver College of Medicine University of Iowa, Iowa City, IA, USA.
| | - Thorsten Maretzky
- Inflammation Program, Roy J. and Lucille A. Carver College of Medicine University of Iowa, Iowa City, IA, USA; Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine University of Iowa, Iowa City, IA, USA; Immunology Graduate Program, Iowa City, IA, USA; Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA.
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13
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Abstract
The immune system plays an important role in obesity-induced adipose tissue inflammation and the resultant metabolic dysfunction, which can lead to hypertension, dyslipidemia, and insulin resistance and their downstream sequelae of type 2 diabetes mellitus and cardiovascular disease. While macrophages are the most abundant immune cell type in adipose tissue, other immune cells are also present, such as B cells, which play important roles in regulating adipose tissue inflammation. This brief review will overview B-cell subsets, describe their localization in various adipose depots and summarize our knowledge about the function of these B-cell subsets in regulating adipose tissue inflammation, obesity-induced metabolic dysfunction and atherosclerosis.
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Affiliation(s)
- Prasad Srikakulapu
- From the Cardiovascular Research Center, Cardiovascular Division, Department of Medicine, University of Virginia, Charlottesville
| | - Coleen A McNamara
- From the Cardiovascular Research Center, Cardiovascular Division, Department of Medicine, University of Virginia, Charlottesville
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14
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Chernis N, Masschelin P, Cox AR, Hartig SM. Bisphenol AF promotes inflammation in human white adipocytes. Am J Physiol Cell Physiol 2020; 318:C63-C72. [PMID: 31596606 PMCID: PMC6985838 DOI: 10.1152/ajpcell.00175.2019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 09/30/2019] [Accepted: 10/08/2019] [Indexed: 01/08/2023]
Abstract
Endocrine-disrupting chemicals interact with transcription factors essential for adipocyte differentiation. Exposure to endocrine-disrupting chemicals corresponds with elevated risks of obesity, but the effects of these compounds on human cells remain largely undefined. Widespread use of bisphenol AF (BPAF) as a bisphenol A (BPA) alternative in the plastics industry presents unknown health risks. To this end, we discovered that BPAF interferes with the metabolic function of mature human adipocytes. Although 4-day exposures to BPAF accelerated adipocyte differentiation, we observed no effect on mature fat cell marker genes. Additional gene and protein expression analysis showed that BPAF treatment during human adipocyte differentiation failed to suppress the proinflammatory transcription factor STAT1. Microscopy and respirometry experiments demonstrated that BPAF impaired mitochondrial function and structure. To test the hypothesis that BPAF fosters vulnerabilities to STAT1 activation, we treated mature adipocytes previously exposed to BPAF with interferon-γ (IFNγ). BPAF increased IFNγ activation of STAT1 and exposed mitochondrial vulnerabilities that disrupt adipocyte lipid and carbohydrate metabolism. Collectively, our data establish that BPAF activates inflammatory signaling pathways that degrade metabolic activity in human adipocytes. These findings suggest how the BPA alternative BPAF contributes to metabolic changes that correspond with obesity.
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Affiliation(s)
- Natasha Chernis
- Division of Diabetes, Endocrinology, and Metabolism, Department of Medicine, Baylor College of Medicine, Houston, Texas
| | - Peter Masschelin
- Division of Diabetes, Endocrinology, and Metabolism, Department of Medicine, Baylor College of Medicine, Houston, Texas
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas
| | - Aaron R Cox
- Division of Diabetes, Endocrinology, and Metabolism, Department of Medicine, Baylor College of Medicine, Houston, Texas
| | - Sean M Hartig
- Division of Diabetes, Endocrinology, and Metabolism, Department of Medicine, Baylor College of Medicine, Houston, Texas
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas
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15
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Hafidi ME, Buelna-Chontal M, Sánchez-Muñoz F, Carbó R. Adipogenesis: A Necessary but Harmful Strategy. Int J Mol Sci 2019; 20:ijms20153657. [PMID: 31357412 PMCID: PMC6696444 DOI: 10.3390/ijms20153657] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/16/2019] [Accepted: 07/20/2019] [Indexed: 02/06/2023] Open
Abstract
Obesity is considered to significantly increase the risk of the development of a vast range of metabolic diseases. However, adipogenesis is a complex physiological process, necessary to sequester lipids effectively to avoid lipotoxicity in other tissues, like the liver, heart, muscle, essential for maintaining metabolic homeostasis and has a crucial role as a component of the innate immune system, far beyond than only being an inert mass of energy storage. In pathophysiological conditions, adipogenesis promotes a pro-inflammatory state, angiogenesis and the release of adipokines, which become dangerous to health. It results in a hypoxic state, causing oxidative stress and the synthesis and release of harmful free fatty acids. In this review, we try to explain the mechanisms occurring at the breaking point, at which adipogenesis leads to an uncontrolled lipotoxicity. This review highlights the types of adipose tissue and their functions, their way of storing lipids until a critical point, which is associated with hypoxia, inflammation, insulin resistance as well as lipodystrophy and adipogenesis modulation by Krüppel-like factors and miRNAs.
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Affiliation(s)
- Mohammed El Hafidi
- Departamento de Biomedicina Cardiovascular, Instituto Nacional de Cardiología "Ignacio Chávez", México City 14080, Mexico
| | - Mabel Buelna-Chontal
- Departamento de Biomedicina Cardiovascular, Instituto Nacional de Cardiología "Ignacio Chávez", México City 14080, Mexico
| | - Fausto Sánchez-Muñoz
- Departamento de Inmunología, Instituto Nacional de Cardiología "Ignacio Chávez", México City 14080, Mexico
| | - Roxana Carbó
- Departamento de Biomedicina Cardiovascular, Instituto Nacional de Cardiología "Ignacio Chávez", México City 14080, Mexico.
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16
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Dey P, Sasaki GY, Wei P, Li J, Wang L, Zhu J, McTigue D, Yu Z, Bruno RS. Green tea extract prevents obesity in male mice by alleviating gut dysbiosis in association with improved intestinal barrier function that limits endotoxin translocation and adipose inflammation. J Nutr Biochem 2019; 67:78-89. [PMID: 30856467 DOI: 10.1016/j.jnutbio.2019.01.017] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 01/03/2019] [Accepted: 01/29/2019] [Indexed: 01/03/2023]
Abstract
Gut-derived endotoxin translocation provokes obesity by inducing TLR4/NFκB inflammation. We hypothesized that catechin-rich green tea extract (GTE) would protect against obesity-associated TLR4/NFκB inflammation by alleviating gut dysbiosis and limiting endotoxin translocation. Male C57BL/6J mice were fed a low-fat (LF) or high-fat (HF) diet containing 0% or 2% GTE for 8 weeks. At Week 7, fluorescein isothiocyanate (FITC)-dextran was administered by oral gavage before assessing its serum concentrations as a gut permeability marker. HF-feeding increased (P<.05) adipose mass and adipose expression of genes involved in TLR4/NFκB-dependent inflammation and macrophage activation. GTE attenuated HF-induced obesity and pro-inflammatory gene expression. GTE in HF mice decreased serum FITC-dextran, and attenuated portal vein and circulating endotoxin concentrations. GTE in HF mice also prevented HF-induced decreases in the expression of intestinal tight junction proteins (TJPs) and hypoxia inducible factor-1α while preventing increases in TLR4/NFκB-dependent inflammatory genes. Gut microbial diversity was increased, and the Firmicutes:Bacteroidetes ratio was decreased, in HF mice fed GTE compared with HF controls. GTE in LF mice did not attenuate adiposity but decreased endotoxin and favorably altered several gut bacterial populations. Serum FITC-dextran was correlated with portal vein endotoxin (P<.001; rP=0.66) and inversely correlated with colonic mRNA levels of TJPs (P<.05; rP=-0.38 to -0.48). Colonic TJPs mRNA were inversely correlated with portal endotoxin (P<.05; rP=-0.33 to -0.39). These data suggest that GTE protects against diet-induced obesity consistent with a mechanism involving the gut-adipose axis that limits endotoxin translocation and consequent adipose TLR4/NFκB inflammation by improving gut barrier function.
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Affiliation(s)
- Priyankar Dey
- Human Nutrition Program, The Ohio State University, Columbus, OH, USA
| | - Geoffrey Y Sasaki
- Human Nutrition Program, The Ohio State University, Columbus, OH, USA
| | - Ping Wei
- Department of Neuroscience and Center for Brain and Spinal Cord Repair, The Ohio State University, Columbus, OH, USA
| | - Jinhui Li
- Human Nutrition Program, The Ohio State University, Columbus, OH, USA
| | - Lingling Wang
- Department of Animal Sciences, The Ohio State University, Columbus, OH, USA
| | - Jiangjiang Zhu
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH, USA
| | - Dana McTigue
- Department of Neuroscience and Center for Brain and Spinal Cord Repair, The Ohio State University, Columbus, OH, USA
| | - Zhongtang Yu
- Department of Animal Sciences, The Ohio State University, Columbus, OH, USA
| | - Richard S Bruno
- Human Nutrition Program, The Ohio State University, Columbus, OH, USA.
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17
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Murphy KP, Hendley MA, Isely C, Annamalai P, Peña E, Gower RM. Resveratrol Delivery from Porous Poly(lactide- co-glycolide) Scaffolds Promotes an Anti-Inflammatory Environment within Visceral Adipose Tissue. ACS Appl Mater Interfaces 2018; 10:43363-43374. [PMID: 30462474 PMCID: PMC7076954 DOI: 10.1021/acsami.8b13421] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
As biomaterial therapies emerge to address adipose tissue dysfunction that underlies metabolic disease, the immune response to these systems must be established. As a potential therapy, we are investigating resveratrol delivery from porous poly(lactide- co-glycolide) scaffolds designed to integrate with adipose tissue. Resveratrol was selected for its ability to protect mice and primates from high fat diet and broad anti-inflammatory properties. Herein, we report fabrication of scaffolds with high resveratrol loading that are stable and active for up to one year. In vitro release profiles indicate that drug release is biphasic with a burst release over 3 days followed by a plateau. Surprisingly, we find that PLG scaffolds implanted into adipose tissue of mice promote an anti-inflammatory environment characterized by high arginase-1 and low TNF-α and IL-6 compared to naïve unmanipulated fat. Resveratrol delivery from the scaffold augments this anti-inflammatory environment by decreasing monocyte and lymphocyte numbers at the implant site and increasing expression of IL-10 and IL-13, cytokines that promote healthy adipose tissue. In terms of therapeutic applications, implant of scaffolds designed to release resveratrol into the visceral fat decreases MCP-1 expression in mice fed a high fat diet, a molecule that drives both local and systemic inflammation during obesity. Taken together, resveratrol delivery to adipose tissue using poly(lactide- co-glycolide) scaffolds is a promising therapeutic strategy for the treatment of adipose tissue inflammation that drives metabolic disease.
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Affiliation(s)
- Kendall P. Murphy
- Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA
| | - Michael A. Hendley
- Biomedical Engineering Program, University of South Carolina, Columbia, SC 29208, USA
| | - Christopher Isely
- Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA
| | - Prakasam Annamalai
- Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA
| | - Edsel Peña
- Department of Statistics, University of South Carolina, Columbia, SC 29208, USA
| | - R. Michael Gower
- Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA
- Biomedical Engineering Program, University of South Carolina, Columbia, SC 29208, USA
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18
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Li J, Feng B, Nie Y, Jiao P, Lin X, Huang M, An R, He Q, Zhou HE, Salomon A, Sigrist KS, Wu Z, Liu S, Xu H. Sucrose Nonfermenting-Related Kinase Regulates Both Adipose Inflammation and Energy Homeostasis in Mice and Humans. Diabetes 2018; 67:400-411. [PMID: 29298809 PMCID: PMC5828454 DOI: 10.2337/db17-0745] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 12/15/2017] [Indexed: 12/30/2022]
Abstract
Sucrose nonfermenting-related kinase (SNRK) is a member of the AMPK-related kinase family, and its physiological role in adipose energy homeostasis and inflammation remains unknown. We previously reported that SNRK is ubiquitously and abundantly expressed in both white adipose tissue (WAT) and brown adipose tissue (BAT), but SNRK expression diminishes in adipose tissue in obesity. In this study we report novel experimental findings from both animal models and human genetics. SNRK is essential for survival; SNRK globally deficient pups die within 24 h after birth. Heterozygous mice are characterized by inflamed WAT and less BAT. Adipocyte-specific ablation of SNRK causes inflammation in WAT, ectopic lipid deposition in liver and muscle, and impaired adaptive thermogenesis in BAT. These metabolic disorders subsequently lead to decreased energy expenditure, higher body weight, and insulin resistance. We further confirm the significant association of common variants of the SNRK gene with obesity risk in humans. Through applying a phosphoproteomic approach, we identified eukaryotic elongation factor 1δ and histone deacetylase 1/2 as potential SNRK substrates. Taking these data together, we conclude that SNRK represses WAT inflammation and is essential to maintain BAT thermogenesis, making it a novel therapeutic target for treating obesity and associated metabolic disorders.
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MESH Headings
- Adipocytes, Brown/immunology
- Adipocytes, Brown/metabolism
- Adipocytes, Brown/pathology
- Adipocytes, Brown/ultrastructure
- Adipocytes, White/immunology
- Adipocytes, White/metabolism
- Adipocytes, White/pathology
- Adipocytes, White/ultrastructure
- Animals
- Body Mass Index
- Cells, Cultured
- Crosses, Genetic
- Energy Metabolism
- Female
- Gene Expression Regulation
- Genetic Predisposition to Disease
- Genome-Wide Association Study
- Humans
- Male
- Mice, Knockout
- Mice, Transgenic
- Microscopy, Electron, Transmission
- Mitochondria/immunology
- Mitochondria/metabolism
- Mitochondria/pathology
- Mitochondria/ultrastructure
- Obesity/genetics
- Obesity/physiopathology
- Panniculitis/etiology
- Panniculitis/immunology
- Panniculitis/metabolism
- Panniculitis/pathology
- Polymorphism, Single Nucleotide
- Protein Serine-Threonine Kinases/antagonists & inhibitors
- Protein Serine-Threonine Kinases/genetics
- Protein Serine-Threonine Kinases/metabolism
- RNA Interference
- Thermogenesis
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Affiliation(s)
- Jie Li
- National Key Discipline, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, China
- Department of Epidemiology, Brown University, Providence, RI
- Center for Global Cardiometabolic Health, Brown University, Providence, RI
| | - Bin Feng
- Hallett Center for Diabetes and Endocrinology, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, RI
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, Sichuan Province, China
| | - Yaohui Nie
- Hallett Center for Diabetes and Endocrinology, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, RI
| | - Ping Jiao
- Hallett Center for Diabetes and Endocrinology, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, RI
- School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin Province, China
| | - Xiaochen Lin
- Department of Epidemiology, Brown University, Providence, RI
- Center for Global Cardiometabolic Health, Brown University, Providence, RI
| | - Mengna Huang
- Department of Epidemiology, Brown University, Providence, RI
- Center for Global Cardiometabolic Health, Brown University, Providence, RI
| | - Ran An
- Department of Epidemiology, Brown University, Providence, RI
- Department of Pharmaceutical Analysis and Analytical Chemistry, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Qin He
- Hallett Center for Diabetes and Endocrinology, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, RI
| | | | - Arthur Salomon
- Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI
- Department of Chemistry, Brown University, Providence, RI
| | - Kirsten S Sigrist
- Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI
| | - Zhidan Wu
- Musculoskeletal Disease Area, Novartis Institutes for Biomedical Research, Cambridge, MA
| | - Simin Liu
- Department of Epidemiology, Brown University, Providence, RI
- Center for Global Cardiometabolic Health, Brown University, Providence, RI
- Hallett Center for Diabetes and Endocrinology, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, RI
| | - Haiyan Xu
- Department of Epidemiology, Brown University, Providence, RI
- Center for Global Cardiometabolic Health, Brown University, Providence, RI
- Hallett Center for Diabetes and Endocrinology, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, RI
- Merck & Co., Boston, MA
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19
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Subramanian S, Goodspeed L, Wang S, Ding Y, O'Brien KD, Getz GS, Chait A, Reardon CA. Deficiency of Invariant Natural Killer T Cells Does Not Protect Against Obesity but Exacerbates Atherosclerosis in Ldlr -/- Mice. Int J Mol Sci 2018; 19:ijms19020510. [PMID: 29419749 PMCID: PMC5855732 DOI: 10.3390/ijms19020510] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 01/27/2018] [Accepted: 01/29/2018] [Indexed: 12/30/2022] Open
Abstract
Obesity is a chronic inflammatory state characterized by altered levels of adipose tissue immune cell populations. Natural killer T (NKT) cells are CD1d restricted lymphocyte subsets that recognize lipid antigens whose level decreases in obese adipose tissue. However, studies in mice with deficiency or increased levels of NKT cells have yielded contradictory results, so the exact role of these cells in obesity and adipose tissue inflammation is not yet established. We previously showed that Ldlr−/− mice with excess invariant NKT (iNKT) cells demonstrate significant weight gain, adiposity, metabolic abnormalities, and atherosclerosis. The current study evaluates the effects of NKT cell deficiency on obesity, associated metabolic changes, and atherosclerosis in Jα18−/−Ldlr−/− (lacking iNKT cells) and Cd1d−/−Ldlr−/− (lacking invariant and type II NKT cells) mice, and control mice were fed an obesogenic diet (high fat, sucrose, cholesterol) for 16 weeks. Contrary to expectations, Ja18−/−Ldlr−/− mice gained significantly more weight than Ldlr−/− or Cd1d−/−Ldlr−/− mice, developed hypertriglyceridemia, and had worsened adipose tissue inflammation. All the mice developed insulin resistance and hepatic triglyceride accumulation. Ja18−/−Ldlr−/− mice also had increased atherosclerotic lesion area. Our findings suggest that iNKT cells exacerbates the metabolic, inflammatory, and atherosclerotic features of diet-induced obesity. Further work is required to unravel the paradox of an apparently similar effect of iNKT cell surplus and depletion on obesity.
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Affiliation(s)
- Savitha Subramanian
- Diabetes Obesity Center for Excellence, Division of Metabolism, Endocrinology and Nutrition, University of Washington, 850 Republican Street Box 35805, Seattle, WA 98109, USA.
| | - Leela Goodspeed
- Diabetes Obesity Center for Excellence, Division of Metabolism, Endocrinology and Nutrition, University of Washington, 850 Republican Street Box 35805, Seattle, WA 98109, USA.
| | - Shari Wang
- Diabetes Obesity Center for Excellence, Division of Metabolism, Endocrinology and Nutrition, University of Washington, 850 Republican Street Box 35805, Seattle, WA 98109, USA.
| | - Yilei Ding
- Diabetes Obesity Center for Excellence, Division of Metabolism, Endocrinology and Nutrition, University of Washington, 850 Republican Street Box 35805, Seattle, WA 98109, USA.
| | - Kevin D O'Brien
- Division of Cardiology, University of Washington, Seattle, WA 98195, USA.
| | - Godfrey S Getz
- Department of Pathology, University of Chicago, Chicago, IL 60637, USA.
| | - Alan Chait
- Diabetes Obesity Center for Excellence, Division of Metabolism, Endocrinology and Nutrition, University of Washington, 850 Republican Street Box 35805, Seattle, WA 98109, USA.
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20
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Petrus P, Bialesova L, Checa A, Kerr A, Naz S, Bäckdahl J, Gracia A, Toft S, Dahlman-Wright K, Hedén P, Dahlman I, Wheelock CE, Arner P, Mejhert N, Gao H, Rydén M. Adipocyte Expression of SLC19A1 Links DNA Hypermethylation to Adipose Tissue Inflammation and Insulin Resistance. J Clin Endocrinol Metab 2018; 103:710-721. [PMID: 29121255 DOI: 10.1210/jc.2017-01382] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [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: 06/17/2017] [Accepted: 11/02/2017] [Indexed: 02/07/2023]
Abstract
CONTEXT Insulin resistance (IR) is promoted by a chronic low-grade inflammation in white adipose tissue (WAT). The latter might be regulated through epigenetic mechanisms such as DNA methylation. The one carbon cycle (1CC) is a central metabolic process governing DNA methylation. OBJECTIVE To identify adipocyte-expressed 1CC genes linked to WAT inflammation, IR, and their causal role. DESIGN Cohort study. SETTING Outpatient academic clinic. PARTICIPANTS Obese and nonobese subjects. METHODS Gene expression and DNA methylation arrays were performed in subcutaneous WAT and isolated adipocytes. In in vitro differentiated human adipocytes, gene knockdown was achieved by small interfering RNA, and analyses included microarray, quantitative polymerase chain reaction, DNA methylation by enzyme-linked immunosorbent assay and pyrosequencing, protein secretion by enzyme-linked immunosorbent assay, targeted metabolomics, and luciferase reporter and thermal shift assays. MAIN OUTCOME MEASURES Effects on adipocyte inflammation. RESULTS In adipocytes from obese individuals, global DNA hypermethylation was associated positively with gene expression of proinflammatory pathways. Among the 1CC genes, IR in vivo and proinflammatory gene expression in WAT were most strongly and inversely associated with SLC19A1, a gene encoding a membrane folate carrier. SLC19A1 knockdown in human adipocytes perturbed intracellular 1CC metabolism, induced global DNA hypermethylation, and increased expression of proinflammatory genes. Several CpG loci linked SLC19A1 to inflammation; validation studies were focused on the chemokine C-C motif chemokine ligand 2 (CCL2) in which methylation in the promoter (cg12698626) regulated CCL2 expression and CCL2 secretion through altered transcriptional activity. CONCLUSIONS Reduced SLC19A1 expression in human adipocytes induces DNA hypermethylation, resulting in increased expression of specific proinflammatory genes, including CCL2. This constitutes an epigenetic mechanism that might link dysfunctional adipocytes to WAT inflammation and IR.
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Affiliation(s)
- Paul Petrus
- Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Lucia Bialesova
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Antonio Checa
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Alastair Kerr
- Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Shama Naz
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Jesper Bäckdahl
- Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Ana Gracia
- Department of Nutrition and Food Science, University of Basque Country (UPV/EHU), Vitoria, Spain
- CIBER Physiopathology of Obesity and Nutrition, Institute of Health Carlos III, Madrid, Spain
| | - Sofia Toft
- Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Karin Dahlman-Wright
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Per Hedén
- Department of Plastic Surgery, Akademikliniken, Stockholm, Sweden
| | - Ingrid Dahlman
- Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Craig E Wheelock
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Peter Arner
- Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Niklas Mejhert
- Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Hui Gao
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Mikael Rydén
- Department of Medicine, Karolinska Institutet, Stockholm, Sweden
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21
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Zieger K, Weiner J, Kunath A, Gericke M, Krause K, Kern M, Stumvoll M, Klöting N, Blüher M, Heiker JT. Ablation of kallikrein 7 (KLK7) in adipose tissue ameliorates metabolic consequences of high fat diet-induced obesity by counteracting adipose tissue inflammation in vivo. Cell Mol Life Sci 2018; 75:727-742. [PMID: 28932870 PMCID: PMC5769829 DOI: 10.1007/s00018-017-2658-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 09/04/2017] [Accepted: 09/13/2017] [Indexed: 02/03/2023]
Abstract
Vaspin is an adipokine which improves glucose metabolism and insulin sensitivity in obesity. Kallikrein 7 (KLK7) is the first known protease target inhibited by vaspin and a potential target for the treatment of metabolic disorders. Here, we tested the hypothesis that inhibition of KLK7 in adipose tissue may beneficially affect glucose metabolism and adipose tissue function. Therefore, we have inactivated the Klk7 gene in adipose tissue using conditional gene-targeting strategies in mice. Klk7-deficient mice (ATKlk7 -/-) exhibited less weight gain, predominant expansion of subcutaneous adipose tissue and improved whole body insulin sensitivity under a high fat diet (HFD). ATKlk7 -/- mice displayed higher energy expenditure and food intake, most likely due to altered adipokine secretion including lower circulating leptin. Pro-inflammatory cytokine expression was significantly reduced in combination with an increased percentage of alternatively activated (anti-inflammatory) M2 macrophages in epigonadal adipose tissue of ATKlk7 -/-. Taken together, by attenuating adipose tissue inflammation, altering adipokine secretion and epigonadal adipose tissue expansion, Klk7 deficiency in adipose tissue partially ameliorates the adverse effects of HFD-induced obesity. In summary, we provide first evidence for a previously unrecognized role of KLK7 in adipose tissue with effects on whole body energy expenditure and insulin sensitivity.
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Affiliation(s)
- Konstanze Zieger
- Institute of Biochemistry, Faculty of Biosciences, Pharmacy and Psychology, University of Leipzig, Brüderstr. 34, 04103, Leipzig, Germany
| | - Juliane Weiner
- Institute of Biochemistry, Faculty of Biosciences, Pharmacy and Psychology, University of Leipzig, Brüderstr. 34, 04103, Leipzig, Germany
- Department of Medicine, University of Leipzig, Liebigstr. 20, 04103, Leipzig, Germany
| | - Anne Kunath
- Department of Medicine, University of Leipzig, Liebigstr. 20, 04103, Leipzig, Germany
- German Center for Diabetes Research (DZD), Munich, Germany
| | - Martin Gericke
- Institute of Anatomy, University of Leipzig, Leipzig, Germany
| | - Kerstin Krause
- Department of Medicine, University of Leipzig, Liebigstr. 20, 04103, Leipzig, Germany
| | - Matthias Kern
- German Center for Diabetes Research (DZD), Munich, Germany
| | - Michael Stumvoll
- Department of Medicine, University of Leipzig, Liebigstr. 20, 04103, Leipzig, Germany
| | - Nora Klöting
- German Center for Diabetes Research (DZD), Munich, Germany
- IFB Adiposity Diseases, University of Leipzig, Leipzig, Germany
| | - Matthias Blüher
- Department of Medicine, University of Leipzig, Liebigstr. 20, 04103, Leipzig, Germany.
- IFB Adiposity Diseases, University of Leipzig, Leipzig, Germany.
| | - John T Heiker
- Institute of Biochemistry, Faculty of Biosciences, Pharmacy and Psychology, University of Leipzig, Brüderstr. 34, 04103, Leipzig, Germany.
- Department of Medicine, University of Leipzig, Liebigstr. 20, 04103, Leipzig, Germany.
- IFB Adiposity Diseases, University of Leipzig, Leipzig, Germany.
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22
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Wu C, Zhang H, Zhang J, Xie C, Fan C, Zhang H, Wu P, Wei Q, Tan W, Xu L, Wang L, Xue Y, Guan M. Inflammation and Fibrosis in Perirenal Adipose Tissue of Patients With Aldosterone-Producing Adenoma. Endocrinology 2018; 159:227-237. [PMID: 29059354 DOI: 10.1210/en.2017-00651] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [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: 07/19/2017] [Accepted: 10/16/2017] [Indexed: 12/31/2022]
Abstract
The prevalence of primary aldosteronism is much higher than previously thought. Recent studies have shown that primary aldosteronism is related to a higher risk of cardiovascular events. However, the underlying mechanism is not yet clear. Here we investigate the characteristics, including inflammation, fibrosis, and adipokine expression, of adipose tissues from different deposits in patients with aldosterone-producing adenoma (APA). Inflammation and fibrosis changes were evaluated in perirenal and subcutaneous adipose tissues obtained from patients with APA (n = 16), normotension (NT; n = 10), and essential hypertension (EH; n = 5) undergoing laparoscopic surgery. We also evaluated the effect of aldosterone in isolated human perirenal adipose tissue stromal vascular fraction (SVF) cells and investigated the effect of aldosterone in mouse 3T3-L1 and brown preadipocytes. Compared with the EH group, significantly higher levels of interleukin-6 (IL-6) and tumor necrosis factor-α messenger RNA (mRNA) and protein were observed in perirenal adipose tissue of patients with APA. Expression of genes related to fibrosis and adipogenesis in perirenal adipose tissue was notably higher in patients with APA than in patients with NT and EH. Aldosterone significantly induced IL-6 and fibrosis gene mRNA expression in differentiated SVF cells. Aldosterone treatment enhanced mRNA expression of genes associated with inflammation and fibrosis and stimulated differentiation of 3T3-L1 and brown preadipocytes. In conclusion, these data indicate that high aldosterone in patients with APA may induce perirenal adipose tissue dysfunction and lead to inflammation and fibrosis, which may be involved in the high risk of cardiovascular events observed in patients with primary aldosteronism.
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MESH Headings
- 3T3-L1 Cells
- Adenoma/complications
- Adenoma/metabolism
- Adenoma/physiopathology
- Adenoma/surgery
- Adipocytes, Brown/immunology
- Adipocytes, Brown/metabolism
- Adipocytes, Brown/pathology
- Adipogenesis
- Adipokines/metabolism
- Adrenalectomy
- Aldosterone/metabolism
- Animals
- Cells, Cultured
- Endothelium, Vascular/immunology
- Endothelium, Vascular/metabolism
- Endothelium, Vascular/pathology
- Essential Hypertension/complications
- Female
- Fibrosis
- Humans
- Hyperaldosteronism/etiology
- Intra-Abdominal Fat/immunology
- Intra-Abdominal Fat/metabolism
- Intra-Abdominal Fat/pathology
- Male
- Mice
- Middle Aged
- Panniculitis/etiology
- Panniculitis/immunology
- Panniculitis/metabolism
- Panniculitis/pathology
- Stromal Cells/immunology
- Stromal Cells/metabolism
- Stromal Cells/pathology
- Subcutaneous Fat, Abdominal/immunology
- Subcutaneous Fat, Abdominal/metabolism
- Subcutaneous Fat, Abdominal/pathology
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Affiliation(s)
- Chunyan Wu
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Huijian Zhang
- Department of Urology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Jiajun Zhang
- Department of Medical Imaging Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Cuihua Xie
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Cunxia Fan
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Hongbin Zhang
- Department of Biomedical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark
| | - Peng Wu
- Department of Urology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Qiang Wei
- Department of Urology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Wanlong Tan
- Department of Urology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Lingling Xu
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Ling Wang
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Yaoming Xue
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Meiping Guan
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
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23
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Mazurek T, Kobylecka M, Zielenkiewicz M, Kurek A, Kochman J, Filipiak KJ, Mazurek K, Huczek Z, Królicki L, Opolski G. PET/CT evaluation of 18F-FDG uptake in pericoronary adipose tissue in patients with stable coronary artery disease: Independent predictor of atherosclerotic lesions' formation? J Nucl Cardiol 2017; 24:1075-1084. [PMID: 26951555 DOI: 10.1007/s12350-015-0370-6] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 12/01/2015] [Indexed: 01/04/2023]
Abstract
BACKGROUND Inflammatory infiltrations in EAT which releases inflammatory cytokines correspond anatomically to the atheromatous plaques in underlying coronary vessels. However, it is unknown whether inflammatory activity of pericoronary adipose tissue (PCAT) promotes coronary atherosclerosis. METHODS AND RESULTS 35 non-diabetic patients with confirmed CAD and 35 non-CAD controls matched for age and BMI underwent 18F-FDG-PET/CT. Maximal SUV normalized by LA blood activity was measured on the sections corresponding to the respective coronaries (RCA, LCX, LAD), as well, as in subcutaneous fat, visceral fat, and epicardial fat. Extent of CAD was determined by % stenosis in segments corresponding to 18F-FDG-PET/CT sections in coronarography using quantitative coronary analysis. PCAT SUV was significantly greater than SUV in other fat locations, as well as PCAT SUV in the controls. In CAD patients with BMI >25, PCAT SUV was positively related to % stenosis of a respective coronary artery (RCA: 0.43; P < .05; LCX 0.58; P < .05; LAD 0.65; P < .05). PCAT SUV was the only independent predictor of coronary stenosis of LAD and RCA. CONCLUSIONS Inflammatory activity of PCAT is greater than in other fat locations, in CAD is greater than in non-CAD controls, and is independently associated with coronary stenosis. In overweight patients, PCAT SUV correlates with the extent of CAD.
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Affiliation(s)
- Tomasz Mazurek
- First Chair and Department of Cardiology, Medical University of Warsaw, Banacha 1a, 02-097, Warsaw, Poland.
| | | | | | - Aleksandra Kurek
- The International Institute of Molecular and Cell Biology, Polish Academy of Sciences, Warsaw, Poland
| | - Janusz Kochman
- First Chair and Department of Cardiology, Medical University of Warsaw, Banacha 1a, 02-097, Warsaw, Poland
| | - Krzysztof J Filipiak
- First Chair and Department of Cardiology, Medical University of Warsaw, Banacha 1a, 02-097, Warsaw, Poland
| | - Krzysztof Mazurek
- Józef Piłsudski University of Physical Education in Warsaw, Warsaw, Poland
| | - Zenon Huczek
- First Chair and Department of Cardiology, Medical University of Warsaw, Banacha 1a, 02-097, Warsaw, Poland
| | - Leszek Królicki
- Department of Nuclear Medicine, Medical University of Warsaw, Warsaw, Poland
| | - Grzegorz Opolski
- First Chair and Department of Cardiology, Medical University of Warsaw, Banacha 1a, 02-097, Warsaw, Poland
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24
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Qi X, Zhang B, Zhao Y, Li R, Chang HM, Pang Y, Qiao J. Hyperhomocysteinemia Promotes Insulin Resistance and Adipose Tissue Inflammation in PCOS Mice Through Modulating M2 Macrophage Polarization via Estrogen Suppression. Endocrinology 2017; 158:1181-1193. [PMID: 28323956 DOI: 10.1210/en.2017-00039] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [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: 01/08/2017] [Accepted: 03/10/2017] [Indexed: 01/16/2023]
Abstract
It has been shown that serum homocysteine (Hcy) levels are higher in women with polycystic ovary syndrome (PCOS). However, the specific role of hyperhomocysteinemia (HHcy) in the development of PCOS has never been reported. Adipose tissue inflammation is featured by the infiltration of macrophages, which plays a critical role in the pathogenesis of glucose and insulin intolerance. In this study, C57BL/6 mice were treated with dehydroepiandrosterone (DHEA) and/or a high methionine diet to induce PCOS and HHcy mice models. We showed that DHEA induced a PCOS-like phenotypes, irregular estrous cycles, weight gain, abnormal sex hormone production, glucose and insulin resistance, and polycystic ovaries. HHcy further intensified the effects DHEA on the metabolic, endocrinal, hormonal, and morphological changes in PCOS-like mice. In addition, HHcy attenuated the DHEA-induced increase in serum estrogen levels in mice. Furthermore, HHcy may exacerbate the insulin resistance in PCOS-like mice, most likely through modulating the macrophage M1/M2 polarization pathways via the suppression of estrogen. Most important, our clinical data showed that there were increases in serum Hcy levels in patients with PCOS. These findings deepen our understanding of the pathological roles of HHcy in the development of PCOS and provide a promising target for PCOS therapy in clinical application.
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Affiliation(s)
- Xinyu Qi
- Reproductive Medical Center, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing 100191, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing 100191, China
| | - Bochun Zhang
- Reproductive Medical Center, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing 100191, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing 100191, China
| | - Yue Zhao
- Reproductive Medical Center, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing 100191, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing 100191, China
| | - Rong Li
- Reproductive Medical Center, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing 100191, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing 100191, China
| | - Hsun-Ming Chang
- Reproductive Medical Center, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing 100191, China
| | - Yanli Pang
- Reproductive Medical Center, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing 100191, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing 100191, China
| | - Jie Qiao
- Reproductive Medical Center, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing 100191, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing 100191, China
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25
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Sano T, Nagayasu S, Suzuki S, Iwashita M, Yamashita A, Shinjo T, Sanui T, Kushiyama A, Kanematsu T, Asano T, Nishimura F. Epicatechin downregulates adipose tissue CCL19 expression and thereby ameliorates diet-induced obesity and insulin resistance. Nutr Metab Cardiovasc Dis 2017; 27:249-259. [PMID: 28062181 DOI: 10.1016/j.numecd.2016.11.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [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: 08/15/2016] [Revised: 11/05/2016] [Accepted: 11/11/2016] [Indexed: 11/20/2022]
Abstract
BACKGROUND AND AIMS Epicatechin (EC) intake has been suggested to be beneficial for the prevention of cardiovascular disorders, and it is well known that adipose tissue inflammation is one of the major risk factors for coronary heart diseases. The purpose of the present study was to determine the in vitro and in vivo effects of EC on adipose tissue inflammation and obesity. METHODS AND RESULTS DNA microarray analysis was performed to evaluate the effects of EC on gene expression in adipocytes co-cultured with bacterial endotoxin-stimulated macrophages. To determine the in vivo effects of the catechin, C57BL/6 mice were fed either a high-fat diet (HFD) or HFD combined with EC, and metabolic changes were observed EC suppressed the expression of many inflammatory genes in the adipocytes co-cultured with endotoxin-stimulated macrophages. Specifically, EC markedly suppressed chemokine (CC motif) ligand 19 (CCL19) expression. The target cell of EC appeared to macrophages. The in vivo study indicated that mice fed the EC-supplemented HFD were protected from diet-induced obesity and insulin resistance. Accordingly, the expression levels of genes associated with inflammation in adipose tissue and in the liver were downregulated in this group of mice. CONCLUSIONS EC exerts beneficial effects for the prevention of adipose tissue inflammation and insulin resistance. Since we previously reported that mice deficient in the CCL19 receptor were protected from diet-induced obesity and insulin resistance, it can be concluded that the beneficial effects of EC could be mediated, at least in part, by marked suppression of CCL19 expression.
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Affiliation(s)
- T Sano
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - S Nagayasu
- Department of Dental Science for Health Promotion, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - S Suzuki
- Department of Dental Science for Health Promotion, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - M Iwashita
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - A Yamashita
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - T Shinjo
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - T Sanui
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - A Kushiyama
- Division of Metabolic Diseases, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan
| | - T Kanematsu
- Department of Cellular and Molecular Pharmacology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - T Asano
- Department of Biological Chemistry, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - F Nishimura
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan.
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26
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Svart M, Kampmann U, Voss T, Pedersen SB, Johannsen M, Rittig N, Poulsen PL, Nielsen TS, Jessen N, Møller N. Combined Insulin Deficiency and Endotoxin Exposure Stimulate Lipid Mobilization and Alter Adipose Tissue Signaling in an Experimental Model of Ketoacidosis in Subjects With Type 1 Diabetes: A Randomized Controlled Crossover Trial. Diabetes 2016; 65:1380-6. [PMID: 26884439 DOI: 10.2337/db15-1645] [Citation(s) in RCA: 12] [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] [Received: 12/02/2015] [Accepted: 02/09/2016] [Indexed: 11/13/2022]
Abstract
Most often, diabetic ketoacidosis (DKA) in adults results from insufficient insulin administration and acute infection. DKA is assumed to release proinflammatory cytokines and stress hormones that stimulate lipolysis and ketogenesis. We tested whether this perception of DKA can be reproduced in an experimental human model by using combined insulin deficiency and acute inflammation and tested which intracellular mediators of lipolysis are affected in adipose tissue. Nine subjects with type 1 diabetes were studied twice: 1) insulin-controlled euglycemia and 2) insulin deprivation and endotoxin administration (KET). During KET, serum tumor necrosis factor-α, cortisol, glucagon, and growth hormone levels increased, and free fatty acids and 3-hydroxybutyrate concentrations and the rate of lipolysis rose markedly. Serum bicarbonate and pH decreased. Adipose tissue mRNA contents of comparative gene identification-58 (CGI-58) increased and G0/G1 switch 2 gene (G0S2) mRNA decreased robustly. Neither protein levels of adipose triglyceride lipase (ATGL) nor phosphorylations of hormone-sensitive lipase were altered. The clinical picture of incipient DKA in adults can be reproduced by combined insulin deficiency and endotoxin-induced acute inflammation. The precipitating steps involve the release of proinflammatory cytokines and stress hormones, increased lipolysis, and decreased G0S2 and increased CGI-58 mRNA contents in adipose tissue, compatible with latent ATGL stimulation.
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MESH Headings
- 1-Acylglycerol-3-Phosphate O-Acyltransferase/genetics
- 1-Acylglycerol-3-Phosphate O-Acyltransferase/metabolism
- Adult
- Biopsy
- Cell Cycle Proteins/genetics
- Cell Cycle Proteins/metabolism
- Cross-Over Studies
- Diabetes Mellitus, Type 1/drug therapy
- Diabetes Mellitus, Type 1/immunology
- Diabetes Mellitus, Type 1/metabolism
- Diabetes Mellitus, Type 1/pathology
- Diabetic Ketoacidosis/immunology
- Diabetic Ketoacidosis/metabolism
- Diabetic Ketoacidosis/pathology
- Diabetic Ketoacidosis/prevention & control
- Endotoxins/toxicity
- Gene Expression Regulation/drug effects
- Humans
- Hyperglycemia/chemically induced
- Hyperglycemia/prevention & control
- Hypoglycemic Agents/administration & dosage
- Hypoglycemic Agents/therapeutic use
- Insulin/administration & dosage
- Insulin/therapeutic use
- Insulin, Long-Acting/administration & dosage
- Insulin, Long-Acting/therapeutic use
- Insulin, Short-Acting/administration & dosage
- Insulin, Short-Acting/therapeutic use
- Lipolysis/drug effects
- Male
- Models, Immunological
- Panniculitis/drug therapy
- Panniculitis/immunology
- Panniculitis/metabolism
- Panniculitis/pathology
- Signal Transduction/drug effects
- Subcutaneous Fat, Abdominal/drug effects
- Subcutaneous Fat, Abdominal/immunology
- Subcutaneous Fat, Abdominal/metabolism
- Subcutaneous Fat, Abdominal/pathology
- Young Adult
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Affiliation(s)
- Mads Svart
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark Department of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Ulla Kampmann
- Department of Internal Medicine, Silkeborg Regional Hospital, Silkeborg, Denmark
| | - Thomas Voss
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark Department of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Steen B Pedersen
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Mogens Johannsen
- Section for Forensic Chemistry, Department of Forensic Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Nikolaj Rittig
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark Department of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Per L Poulsen
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Thomas S Nielsen
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Section for Integrative Physiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Niels Jessen
- Department of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Niels Møller
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark Department of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark
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27
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Maessen DE, Brouwers O, Gaens KH, Wouters K, Cleutjens JP, Janssen BJ, Miyata T, Stehouwer CD, Schalkwijk CG. Delayed Intervention With Pyridoxamine Improves Metabolic Function and Prevents Adipose Tissue Inflammation and Insulin Resistance in High-Fat Diet-Induced Obese Mice. Diabetes 2016; 65:956-66. [PMID: 26718500 DOI: 10.2337/db15-1390] [Citation(s) in RCA: 49] [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] [Received: 10/06/2015] [Accepted: 12/17/2015] [Indexed: 11/13/2022]
Abstract
Obesity is associated with an increased risk for the development of type 2 diabetes and vascular complications. Advanced glycation end products are increased in adipose tissue and have been associated with insulin resistance, vascular dysfunction, and inflammation of adipose tissue. Here, we report that delayed intervention with pyridoxamine (PM), a vitamin B6 analog that has been identified as an antiglycating agent, protected against high-fat diet (HFD)-induced body weight gain, hyperglycemia, and hypercholesterolemia, compared with mice that were not treated. In both HFD-induced and db/db obese mice, impaired glucose metabolism and insulin resistance were prevented by PM supplementation. PM inhibited the expansion of adipose tissue and adipocyte hypertrophy in mice. In addition, adipogenesis of murine 3T3-L1 and human Simpson-Golabi-Behmel Syndrome preadipocytes was dose- and time-dependently reduced by PM, as demonstrated by Oil Red O staining and reduced expression of adipogenic differentiation genes. No ectopic fat deposition was found in the liver of HFD mice. The high expression of proinflammatory genes in visceral adipose tissue of the HFD group was significantly attenuated by PM. Treatment with PM partially prevented HFD-induced mild vascular dysfunction. Altogether, these findings highlight the potential of PM to serve as an intervention strategy in obesity.
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MESH Headings
- 3T3-L1 Cells
- Adipose Tissue/metabolism
- Adipose Tissue/pathology
- Animals
- Arrhythmias, Cardiac/metabolism
- Arrhythmias, Cardiac/pathology
- Cells, Cultured
- Diet, High-Fat
- Drug Administration Schedule
- Genetic Diseases, X-Linked/metabolism
- Genetic Diseases, X-Linked/pathology
- Gigantism/metabolism
- Gigantism/pathology
- Heart Defects, Congenital/metabolism
- Heart Defects, Congenital/pathology
- Humans
- Inflammation/metabolism
- Inflammation/prevention & control
- Insulin Resistance
- Intellectual Disability/metabolism
- Intellectual Disability/pathology
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Obese
- Obesity/drug therapy
- Obesity/etiology
- Obesity/metabolism
- Panniculitis/metabolism
- Panniculitis/prevention & control
- Pyridoxamine/administration & dosage
- Time-to-Treatment
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Affiliation(s)
- Dionne E Maessen
- CARIM School for Cardiovascular Diseases, Maastricht University Medical Center, Maastricht, the Netherlands Department of Internal Medicine, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Olaf Brouwers
- CARIM School for Cardiovascular Diseases, Maastricht University Medical Center, Maastricht, the Netherlands Department of Internal Medicine, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Katrien H Gaens
- CARIM School for Cardiovascular Diseases, Maastricht University Medical Center, Maastricht, the Netherlands Department of Internal Medicine, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Kristiaan Wouters
- CARIM School for Cardiovascular Diseases, Maastricht University Medical Center, Maastricht, the Netherlands Department of Internal Medicine, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Jack P Cleutjens
- CARIM School for Cardiovascular Diseases, Maastricht University Medical Center, Maastricht, the Netherlands Department of Pathology, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Ben J Janssen
- CARIM School for Cardiovascular Diseases, Maastricht University Medical Center, Maastricht, the Netherlands Department of Pharmacology, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Toshio Miyata
- United Centers for Advanced Research and Translational Medicine, Tohoku University, Sendai, Japan
| | - Coen D Stehouwer
- CARIM School for Cardiovascular Diseases, Maastricht University Medical Center, Maastricht, the Netherlands Department of Internal Medicine, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Casper G Schalkwijk
- CARIM School for Cardiovascular Diseases, Maastricht University Medical Center, Maastricht, the Netherlands Department of Internal Medicine, Maastricht University Medical Center, Maastricht, the Netherlands
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28
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Kang I, Espín JC, Carr TP, Tomás-Barberán FA, Chung S. Raspberry seed flour attenuates high-sucrose diet-mediated hepatic stress and adipose tissue inflammation. J Nutr Biochem 2016; 32:64-72. [PMID: 27142738 DOI: 10.1016/j.jnutbio.2016.02.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 01/29/2016] [Accepted: 02/23/2016] [Indexed: 12/21/2022]
Abstract
Chronic intake of high sucrose (HS) diet exacerbates high-fat (HF) diet-induced obesity and its associated metabolic complications. Previously, we have demonstrated that ellagic acid (EA), an abundant polyphenol found in some fruits and nuts, exerts distinct lipid-lowering characteristics in hepatocytes and adipocytes. In this study, we hypothesized that EA supplementation inhibits HS diet-mediated hepatic toxicity and its accompanied metabolic dysregulation. To test this hypothesis, C57BL/6 male mice were randomly assigned to three isocaloric HF diets (41% calories from fat) containing either no-sucrose (HF), high-sucrose (HFHS), or high-sucrose plus EA (HFHS-R) from raspberry seed flour (RSF, equivalent to 0.03% of EA), and fed for 12weeks. The inclusion of EA from RSF significantly improved HFHS diet-mediated dyslipidemia and restored glucose homeostasis levels similar to the HF diet-fed mice. Despite marginal difference in hepatic triglyceride content, the addition of EA substantially reversed the activation of endoplasmic reticulum (ER) stress and oxidative damage triggered by HFHS diet in the liver. These effects of EA were further confirmed in human hepatoma cells by reducing ER stress and reactive oxygen species (ROS) production. Moreover, HFHS-R diet significantly decreased visceral adipocyte hypertrophy and adipose tissue inflammation evidenced by reduced proinflammatory gene expression and macrophage infiltration. In summary, EA supplementation from RSF was effective in reducing HFHS diet-mediated metabolic complication by attenuating hepatic ER and oxidative stresses as well as adipocyte inflammation. Our results suggest that the inclusion of EA in diets may normalize metabolic insults triggered by HS consumption.
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Affiliation(s)
- Inhae Kang
- Department of Nutrition and Health Sciences at the University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Juan Carlos Espín
- Department of Food Science and Technology, CEBAS-CSIC, Murcia, Spain
| | - Timothy P Carr
- Department of Nutrition and Health Sciences at the University of Nebraska-Lincoln, Lincoln, NE, USA
| | | | - Soonkyu Chung
- Department of Nutrition and Health Sciences at the University of Nebraska-Lincoln, Lincoln, NE, USA.
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29
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Nishimoto S, Fukuda D, Higashikuni Y, Tanaka K, Hirata Y, Murata C, Kim-Kaneyama JR, Sato F, Bando M, Yagi S, Soeki T, Hayashi T, Imoto I, Sakaue H, Shimabukuro M, Sata M. Obesity-induced DNA released from adipocytes stimulates chronic adipose tissue inflammation and insulin resistance. Sci Adv 2016; 2:e1501332. [PMID: 27051864 PMCID: PMC4820373 DOI: 10.1126/sciadv.1501332] [Citation(s) in RCA: 167] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Accepted: 02/11/2016] [Indexed: 05/08/2023]
Abstract
Obesity stimulates chronic inflammation in adipose tissue, which is associated with insulin resistance, although the underlying mechanism remains largely unknown. Here we showed that obesity-related adipocyte degeneration causes release of cell-free DNA (cfDNA), which promotes macrophage accumulation in adipose tissue via Toll-like receptor 9 (TLR9), originally known as a sensor of exogenous DNA fragments. Fat-fed obese wild-type mice showed increased release of cfDNA, as determined by the concentrations of single-stranded DNA (ssDNA) and double-stranded DNA (dsDNA) in plasma. cfDNA released from degenerated adipocytes promoted monocyte chemoattractant protein-1 (MCP-1) expression in wild-type macrophages, but not in TLR9-deficient (Tlr9 (-/-) ) macrophages. Fat-fed Tlr9 (-/-) mice demonstrated reduced macrophage accumulation and inflammation in adipose tissue and better insulin sensitivity compared with wild-type mice, whereas bone marrow reconstitution with wild-type bone marrow restored the attenuation of insulin resistance observed in fat-fed Tlr9 (-/-) mice. Administration of a TLR9 inhibitory oligonucleotide to fat-fed wild-type mice reduced the accumulation of macrophages in adipose tissue and improved insulin resistance. Furthermore, in humans, plasma ssDNA level was significantly higher in patients with computed tomography-determined visceral obesity and was associated with homeostasis model assessment of insulin resistance (HOMA-IR), which is the index of insulin resistance. Our study may provide a novel mechanism for the development of sterile inflammation in adipose tissue and a potential therapeutic target for insulin resistance.
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Affiliation(s)
- Sachiko Nishimoto
- Department of Nutrition and Metabolism, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Daiju Fukuda
- Department of Cardiovascular Medicine, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
- Corresponding author. E-mail: (D.F.); (M.S.)
| | - Yasutomi Higashikuni
- Department of Cardiovascular Medicine, The University of Tokyo, Tokyo 113-8655, Japan
| | - Kimie Tanaka
- Division for Health Service Promotion, The University of Tokyo, Tokyo 113-8655, Japan
| | - Yoichiro Hirata
- Department of Pediatrics, The University of Tokyo Hospital, Tokyo 113-8655, Japan
| | - Chie Murata
- Department of Human Genetics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Joo-ri Kim-Kaneyama
- Department of Biochemistry, Showa University School of Medicine, Tokyo 142-8555, Japan
| | - Fukiko Sato
- Department of Nutrition and Metabolism, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Masahiro Bando
- Department of Nutrition and Metabolism, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Shusuke Yagi
- Department of Cardiovascular Medicine, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Takeshi Soeki
- Department of Cardiovascular Medicine, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Tetsuya Hayashi
- Laboratory of Cardiovascular Pharmacotherapy and Toxicology, Osaka University of Pharmaceutical Sciences, Osaka 569-1094, Japan
| | - Issei Imoto
- Department of Human Genetics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Hiroshi Sakaue
- Department of Nutrition and Metabolism, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Michio Shimabukuro
- Department of Cardio-Diabetes Medicine, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
- Diabetes and Lifestyle-Related Disease Center, Tomishiro Central Hospital, Okinawa 901-0243, Japan
| | - Masataka Sata
- Department of Cardiovascular Medicine, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
- Corresponding author. E-mail: (D.F.); (M.S.)
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Lecomte M, Couëdelo L, Meugnier E, Plaisancié P, Létisse M, Benoit B, Gabert L, Penhoat A, Durand A, Pineau G, Joffre F, Géloën A, Vaysse C, Laugerette F, Michalski MC. Dietary emulsifiers from milk and soybean differently impact adiposity and inflammation in association with modulation of colonic goblet cells in high-fat fed mice. Mol Nutr Food Res 2016; 60:609-20. [PMID: 26592505 DOI: 10.1002/mnfr.201500703] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 11/04/2015] [Accepted: 11/09/2015] [Indexed: 12/12/2022]
Abstract
SCOPE Enhanced adiposity and metabolic inflammation are major features of obesity that could be impacted by dietary emulsifiers. We investigated in high-fat fed mice the effects of using a new polar lipid (PL) emulsifier from milk (MPL) instead of soybean lecithin (soybean PL [SPL]) on adipose tissue and intestinal mucosa function. METHODS AND RESULTS Four groups of C57BL6 mice received for 8 wks a low-fat (LF) diet or a high-fat diet devoid of PLs or an high-fat diet including MPL (high-fat-MPL) or SPL (high-fat-SPL). Compared with high-fat diet, high-fat-SPL diet increased white adipose tissue (WAT) mass (p < 0.05), with larger adipocytes (p < 0.05) and increased expression of tumor necrosis factor alpha, monochemoattractant protein-1, LPS-binding protein, and leptin (p < 0.05). This was not observed with high-fat-MPL diet despite similar dietary intakes and increased expression of fatty acid transport protein 4 and microsomal TG transfer protein, involved in lipid absorption, in upper intestine (p < 0.05). High-fat-MPL mice had a lower expression in WAT of cluster of differentiation 68, marker of macrophage infiltration, versus high-fat and high-fat-SPL mice (p < 0.05), and more goblet cells in the colon (p < 0.05). CONCLUSIONS Unlike SPL, MPL in the high-fat diet did not induce WAT hypertrophy and inflammation but increased colonic goblet cells. This supports further clinical exploration of different sources of dietary emulsifiers in the frame of obesity outbreak.
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Affiliation(s)
- Manon Lecomte
- INRA, UMR1397, INSERM U1060, CarMeN Laboratory, INSA-Lyon, IMBL, Université Lyon 1, Villeurbanne, France
| | | | | | - Pascale Plaisancié
- INRA, UMR1397, INSERM U1060, CarMeN Laboratory, INSA-Lyon, IMBL, Université Lyon 1, Villeurbanne, France
| | - Marion Létisse
- INRA, UMR1397, INSERM U1060, CarMeN Laboratory, INSA-Lyon, IMBL, Université Lyon 1, Villeurbanne, France
| | - Bérengère Benoit
- INRA, UMR1397, INSERM U1060, CarMeN Laboratory, INSA-Lyon, IMBL, Université Lyon 1, Villeurbanne, France
| | - Laure Gabert
- INSERM U1060, INRA UMR1397, CarMeN Laboratory, Oullins, France
- Centre de Recherche en Nutrition Humaine Rhône-Alpes (CRNH-RA) and Centre Européen pour la Nutrition et la Santé (CENS), Pierre-Bénite, France
| | - Armelle Penhoat
- INRA, UMR1397, INSERM U1060, CarMeN Laboratory, INSA-Lyon, IMBL, Université Lyon 1, Villeurbanne, France
| | - Annie Durand
- INRA, UMR1397, INSERM U1060, CarMeN Laboratory, INSA-Lyon, IMBL, Université Lyon 1, Villeurbanne, France
| | - Gaëlle Pineau
- INRA, UMR1397, INSERM U1060, CarMeN Laboratory, INSA-Lyon, IMBL, Université Lyon 1, Villeurbanne, France
| | | | - Alain Géloën
- INRA, UMR1397, INSERM U1060, CarMeN Laboratory, INSA-Lyon, IMBL, Université Lyon 1, Villeurbanne, France
| | | | - Fabienne Laugerette
- INRA, UMR1397, INSERM U1060, CarMeN Laboratory, INSA-Lyon, IMBL, Université Lyon 1, Villeurbanne, France
| | - Marie-Caroline Michalski
- INRA, UMR1397, INSERM U1060, CarMeN Laboratory, INSA-Lyon, IMBL, Université Lyon 1, Villeurbanne, France
- Centre de Recherche en Nutrition Humaine Rhône-Alpes (CRNH-RA) and Centre Européen pour la Nutrition et la Santé (CENS), Pierre-Bénite, France
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Adamson SE, Griffiths R, Moravec R, Senthivinayagam S, Montgomery G, Chen W, Han J, Sharma PR, Mullins GR, Gorski SA, Cooper JA, Kadl A, Enfield K, Braciale TJ, Harris TE, Leitinger N. Disabled homolog 2 controls macrophage phenotypic polarization and adipose tissue inflammation. J Clin Invest 2016; 126:1311-22. [PMID: 26927671 DOI: 10.1172/jci79590] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 01/14/2016] [Indexed: 02/06/2023] Open
Abstract
Acute and chronic tissue injury results in the generation of a myriad of environmental cues that macrophages respond to by changing their phenotype and function. This phenotypic regulation is critical for controlling tissue inflammation and resolution. Here, we have identified the adaptor protein disabled homolog 2 (DAB2) as a regulator of phenotypic switching in macrophages. Dab2 expression was upregulated in M2 macrophages and suppressed in M1 macrophages isolated from both mice and humans, and genetic deletion of Dab2 predisposed macrophages to adopt a proinflammatory M1 phenotype. In mice with myeloid cell-specific deletion of Dab2 (Dab2fl/fl Lysm-Cre), treatment with sublethal doses of LPS resulted in increased proinflammatory gene expression and macrophage activation. Moreover, chronic high-fat feeding exacerbated adipose tissue inflammation, M1 polarization of adipose tissue macrophages, and the development of insulin resistance in DAB2-deficient animals compared with controls. Mutational analyses revealed that DAB2 interacts with TNF receptor-associated factor 6 (TRAF6) and attenuates IκB kinase β-dependent (IKKβ-dependent) phosphorylation of Ser536 in the transactivation domain of NF-κB p65. Together, these findings reveal that DAB2 is critical for controlling inflammatory signaling during phenotypic polarization of macrophages and suggest that manipulation of DAB2 expression and function may hold therapeutic potential for the treatment of acute and chronic inflammatory disorders.
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Lin L, Lee JH, Buras ED, Yu K, Wang R, Smith CW, Wu H, Sheikh-Hamad D, Sun Y. Ghrelin receptor regulates adipose tissue inflammation in aging. Aging (Albany NY) 2016; 8:178-91. [PMID: 26837433 PMCID: PMC4761721 DOI: 10.18632/aging.100888] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Accepted: 01/20/2016] [Indexed: 12/30/2022]
Abstract
Aging is commonly associated with low-grade adipose inflammation, which is closely linked to insulin resistance. Ghrelin is the only circulating orexigenic hormone which is known to increase obesity and insulin resistance. We previously reported that the expression of the ghrelin receptor, growth hormone secretagogue receptor (GHS-R), increases in adipose tissues during aging, and old Ghsr(-/-) mice exhibit a lean and insulin-sensitive phenotype. Macrophages are major mediators of adipose tissue inflammation, which consist of pro-inflammatory M1 and anti-inflammatory M2 subtypes. Here, we show that in aged mice, GHS-R ablation promotes macrophage phenotypical shift toward anti-inflammatory M2. Old Ghsrp(-/-) mice have reduced macrophage infiltration, M1/M2 ratio, and pro-inflammatory cytokine expression in white and brown adipose tissues. We also found that peritoneal macrophages of old Ghsrp(-/-) mice produce higher norepinephrine, which is in line with increased alternatively-activated M2 macrophages. Our data further reveal that GHS-R has cell-autonomous effects in macrophages, and GHS-R antagonist suppresses lipopolysaccharide (LPS)-induced inflammatory responses in macrophages. Collectively, our studies demonstrate that ghrelin signaling has an important role in macrophage polarization and adipose tissue inflammation during aging. GHS-R antagonists may serve as a novel and effective therapeutic option for age-associated adipose tissue inflammation and insulin resistance.
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Affiliation(s)
- Ligen Lin
- USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Jong Han Lee
- USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Eric D. Buras
- Department of Internal Medicine at University of Michigan Health System, Ann Arbor, MI 48109, USA
| | - Kaijiang Yu
- Department of Intensive Care Unit, the Third Affiliated Hospital, Harbin Medical University, Harbin, 150081, China
| | - Ruitao Wang
- Department of Intensive Care Unit, the Third Affiliated Hospital, Harbin Medical University, Harbin, 150081, China
| | - C. Wayne Smith
- USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Huaizhu Wu
- Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA
| | - David Sheikh-Hamad
- Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Yuxiang Sun
- USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Nutrition and Food Science, Texas A&M University, College Station, TX 77843, USA
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Chen Y, Xu X, Zhang Y, Liu K, Huang F, Liu B, Kou J. Diosgenin regulates adipokine expression in perivascular adipose tissue and ameliorates endothelial dysfunction via regulation of AMPK. J Steroid Biochem Mol Biol 2016; 155:155-65. [PMID: 26277096 DOI: 10.1016/j.jsbmb.2015.07.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [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: 05/20/2015] [Revised: 07/07/2015] [Accepted: 07/12/2015] [Indexed: 12/15/2022]
Abstract
Perivascular adipose tissue (PVAT) has been recognized as an active contributor to vascular function due to its paracrine effects on cells contained within vascular wall. The present study was designed to investigate the effect of diosgenin on adipokine expression in PVAT with emphasis on the regulation of endothelial function. Palmitic acid (PA) stimulation induced inflammation and dysregulation of adipokine expression in PVAT. Diosgenin treatment inhibited IKKβ phosphorylation and downregulated mRNA expressions of proinflammatory cytokines/proteins including tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), monocyte chemoattractant protein (MCP-1), and inducible nitric oxide synthase (iNOS), while reduced gene expressions for adiponectin, PPARγ, and arginase 1 (Arg-1) were reversed by diosgenin treatment. Diosgenin enhanced AMPK phosphorylation under basal and inflammatory conditions in PVAT, whereas knockdown of AMPK by SiRNA diminished its modulatory effect, indicating that diosgenin inhibited inflammation in an AMPK-dependent manner. We prepared conditioned medium from PA-stimulated PVAT to induce endothelial dysfunction and found that pre-treatment of PVAT with diosgenin effectively restored the loss of ACh-induced vasodilation and increased eNOS phosphorylation in rat aorta. High-fat diet feeding in rats induced inflammation in PVAT and the impairment of endothelium-dependent vasodilation, whereas these alterations were prevented by oral administration of diosgenin at doses of 20 and 40 mg/kg. In conclusion, the obtained data showed that diosgenin ameliorated inflammation-associated adipokine dysregulation, and thereby prevented endothelial dysfunction. Our findings would shed a novel insight into the potential mechanism by which diosgenin protected endothelial function against inflammatory insult.
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Affiliation(s)
- Yan Chen
- National Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Complex Prescription of TCM, China Pharmaceutical University, 639 Longmian Road, Nanjing 211198, China
| | - Xiaoshan Xu
- Department of Pharmacology of Chinese Material Medica, China Pharmaceutical University, 639 Longmian Road, Nanjing 211198, China
| | - Yuanyuan Zhang
- National Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Complex Prescription of TCM, China Pharmaceutical University, 639 Longmian Road, Nanjing 211198, China
| | - Kang Liu
- Department of Pharmacology of Chinese Material Medica, China Pharmaceutical University, 639 Longmian Road, Nanjing 211198, China
| | - Fang Huang
- Department of Pharmacology of Chinese Material Medica, China Pharmaceutical University, 639 Longmian Road, Nanjing 211198, China
| | - Baolin Liu
- Department of Pharmacology of Chinese Material Medica, China Pharmaceutical University, 639 Longmian Road, Nanjing 211198, China.
| | - Junping Kou
- National Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Complex Prescription of TCM, China Pharmaceutical University, 639 Longmian Road, Nanjing 211198, China.
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Kilroy G, Carter LE, Newman S, Burk DH, Manuel J, Möller A, Bowtell DD, Mynatt RL, Ghosh S, Floyd ZE. The ubiquitin ligase Siah2 regulates obesity-induced adipose tissue inflammation. Obesity (Silver Spring) 2015; 23:2223-32. [PMID: 26380945 PMCID: PMC4633373 DOI: 10.1002/oby.21220] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [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] [Received: 04/28/2015] [Revised: 06/10/2015] [Accepted: 06/16/2015] [Indexed: 12/25/2022]
Abstract
OBJECTIVE Chronic, low-grade adipose tissue inflammation associated with adipocyte hypertrophy is an important link in the relationship between obesity and insulin resistance. Although ubiquitin ligases regulate inflammatory processes, the role of these enzymes in metabolically driven adipose tissue inflammation is relatively unexplored. Herein, the effect of the ubiquitin ligase Siah2 on obesity-related adipose tissue inflammation was examined. METHODS Wild-type and Siah2KO mice were fed a low- or high-fat diet for 16 weeks. Indirect calorimetry, body composition, and glucose and insulin tolerance were assayed along with glucose and insulin levels. Gene and protein expression, immunohistochemistry, adipocyte size distribution, and lipolysis were also analyzed. RESULTS Enlarged adipocytes in obese Siah2KO mice were not associated with obesity-induced insulin resistance. Proinflammatory gene expression, stress kinase signaling, fibrosis, and crown-like structures were reduced in the Siah2KO adipose tissue, and Siah2KO adipocytes were more responsive to insulin-dependent inhibition of lipolysis. Loss of Siah2 increased expression of PPARγ target genes involved in lipid metabolism and decreased expression of proinflammatory adipokines regulated by PPARγ. CONCLUSIONS Siah2 links adipocyte hypertrophy with adipocyte dysfunction and recruitment of proinflammatory immune cells to adipose tissue. Selective regulation of PPARγ activity is a Siah2-mediated mechanism contributing to obesity-induced adipose tissue inflammation.
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Affiliation(s)
- Gail Kilroy
- Pennington Biomedical Research Center, Baton Rouge, Louisiana
| | | | - Susan Newman
- Pennington Biomedical Research Center, Baton Rouge, Louisiana
| | - David H. Burk
- Pennington Biomedical Research Center, Baton Rouge, Louisiana
| | - Justin Manuel
- Pennington Biomedical Research Center, Baton Rouge, Louisiana
| | - Andreas Möller
- QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - David D. Bowtell
- Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia
| | | | - Sujoy Ghosh
- Pennington Biomedical Research Center, Baton Rouge, Louisiana
- Cardiovascular and Metabolic Disease Program and Center for Computational Biology, Duke-NUS Graduate Medical School, Singapore
| | - Z. Elizabeth Floyd
- Pennington Biomedical Research Center, Baton Rouge, Louisiana
- Corresponding author: Elizabeth Floyd, PhD, Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, Louisiana 70808, Phone: 225-763-2724, FAX: 225-763-0273,
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Dobrian AD, Hatcher MA, Brotman JJ, Galkina EV, Taghavie-Moghadam P, Pei H, Haynes BA, Nadler JL. STAT4 contributes to adipose tissue inflammation and atherosclerosis. J Endocrinol 2015; 227:13-24. [PMID: 26285907 PMCID: PMC4811759 DOI: 10.1530/joe-15-0098] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/05/2015] [Indexed: 12/14/2022]
Abstract
Adipose tissue (AT) inflammation is an emerging factor contributing to cardiovascular disease. STAT4 is a transcription factor expressed in adipocytes and in immune cells and contributes to AT inflammation and insulin resistance in obesity. The objective of this study was to determine the effect of STAT4 deficiency on visceral and peri-aortic AT inflammation in a model of atherosclerosis without obesity. Stat4(-/-)Apoe(-/-) mice and Apoe(-/-) controls were kept either on chow or Western diet for 12 weeks. Visceral and peri-aortic AT were collected and analyzed for immune composition by flow cytometry and for cytokine/chemokine expression by real-time PCR. Stat4(-/-)Apoe(-/-) and Apoe(-/-) mice had similar body weight, plasma glucose, and lipids. Western diet significantly increased macrophage, CD4+, CD8+, and NK cells in peri-aortic and visceral fat in Apoe(-/-) mice. In contrast, in Stat4(-/-)Apoe(-/-) mice, a Western diet failed to increase the percentage of immune cells infiltrating the AT. Also, IL12p40, TNFa, CCL5, CXCL10, and CX3CL1 were significantly reduced in the peri-aortic fat in Stat4(-/-)Apoe(-/-) mice. Importantly, Stat4(-/-)Apoe(-/-) mice on a Western diet had significantly reduced plaque burden vs Apoe(-/-) controls. In conclusion, STAT4 deletion reduces inflammation in peri-vascular and visceral AT and this may contribute via direct or indirect effects to reduced atheroma formation.
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Affiliation(s)
- A D Dobrian
- Departments of Physiological SciencesMicrobiology and Molecular Cell BiologyInternal MedicineEastern Virginia Medical School, 700W Olney Road, Norfolk, Virginia 23505, USADivision of Inflammation BiologyLa Jolla Institute for Allergy and Immunology, San Diego, La Jolla, California, USA
| | - M A Hatcher
- Departments of Physiological SciencesMicrobiology and Molecular Cell BiologyInternal MedicineEastern Virginia Medical School, 700W Olney Road, Norfolk, Virginia 23505, USADivision of Inflammation BiologyLa Jolla Institute for Allergy and Immunology, San Diego, La Jolla, California, USA
| | - J J Brotman
- Departments of Physiological SciencesMicrobiology and Molecular Cell BiologyInternal MedicineEastern Virginia Medical School, 700W Olney Road, Norfolk, Virginia 23505, USADivision of Inflammation BiologyLa Jolla Institute for Allergy and Immunology, San Diego, La Jolla, California, USA
| | - E V Galkina
- Departments of Physiological SciencesMicrobiology and Molecular Cell BiologyInternal MedicineEastern Virginia Medical School, 700W Olney Road, Norfolk, Virginia 23505, USADivision of Inflammation BiologyLa Jolla Institute for Allergy and Immunology, San Diego, La Jolla, California, USA
| | - P Taghavie-Moghadam
- Departments of Physiological SciencesMicrobiology and Molecular Cell BiologyInternal MedicineEastern Virginia Medical School, 700W Olney Road, Norfolk, Virginia 23505, USADivision of Inflammation BiologyLa Jolla Institute for Allergy and Immunology, San Diego, La Jolla, California, USA
| | - H Pei
- Departments of Physiological SciencesMicrobiology and Molecular Cell BiologyInternal MedicineEastern Virginia Medical School, 700W Olney Road, Norfolk, Virginia 23505, USADivision of Inflammation BiologyLa Jolla Institute for Allergy and Immunology, San Diego, La Jolla, California, USA
| | - B A Haynes
- Departments of Physiological SciencesMicrobiology and Molecular Cell BiologyInternal MedicineEastern Virginia Medical School, 700W Olney Road, Norfolk, Virginia 23505, USADivision of Inflammation BiologyLa Jolla Institute for Allergy and Immunology, San Diego, La Jolla, California, USA
| | - J L Nadler
- Departments of Physiological SciencesMicrobiology and Molecular Cell BiologyInternal MedicineEastern Virginia Medical School, 700W Olney Road, Norfolk, Virginia 23505, USADivision of Inflammation BiologyLa Jolla Institute for Allergy and Immunology, San Diego, La Jolla, California, USA
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Damouche A, Lazure T, Avettand-Fènoël V, Huot N, Dejucq-Rainsford N, Satie AP, Mélard A, David L, Gommet C, Ghosn J, Noel N, Pourcher G, Martinez V, Benoist S, Béréziat V, Cosma A, Favier B, Vaslin B, Rouzioux C, Capeau J, Müller-Trutwin M, Dereuddre-Bosquet N, Le Grand R, Lambotte O, Bourgeois C. Adipose Tissue Is a Neglected Viral Reservoir and an Inflammatory Site during Chronic HIV and SIV Infection. PLoS Pathog 2015; 11:e1005153. [PMID: 26402858 PMCID: PMC4581628 DOI: 10.1371/journal.ppat.1005153] [Citation(s) in RCA: 163] [Impact Index Per Article: 18.1] [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: 12/11/2014] [Accepted: 08/14/2015] [Indexed: 12/14/2022] Open
Abstract
Two of the crucial aspects of human immunodeficiency virus (HIV) infection are (i) viral persistence in reservoirs (precluding viral eradication) and (ii) chronic inflammation (directly associated with all-cause morbidities in antiretroviral therapy (ART)-controlled HIV-infected patients). The objective of the present study was to assess the potential involvement of adipose tissue in these two aspects. Adipose tissue is composed of adipocytes and the stromal vascular fraction (SVF); the latter comprises immune cells such as CD4+ T cells and macrophages (both of which are important target cells for HIV). The inflammatory potential of adipose tissue has been extensively described in the context of obesity. During HIV infection, the inflammatory profile of adipose tissue has been revealed by the occurrence of lipodystrophies (primarily related to ART). Data on the impact of HIV on the SVF (especially in individuals not receiving ART) are scarce. We first analyzed the impact of simian immunodeficiency virus (SIV) infection on abdominal subcutaneous and visceral adipose tissues in SIVmac251 infected macaques and found that both adipocytes and adipose tissue immune cells were affected. The adipocyte density was elevated, and adipose tissue immune cells presented enhanced immune activation and/or inflammatory profiles. We detected cell-associated SIV DNA and RNA in the SVF and in sorted CD4+ T cells and macrophages from adipose tissue. We demonstrated that SVF cells (including CD4+ T cells) are infected in ART-controlled HIV-infected patients. Importantly, the production of HIV RNA was detected by in situ hybridization, and after the in vitro reactivation of sorted CD4+ T cells from adipose tissue. We thus identified adipose tissue as a crucial cofactor in both viral persistence and chronic immune activation/inflammation during HIV infection. These observations open up new therapeutic strategies for limiting the size of the viral reservoir and decreasing low-grade chronic inflammation via the modulation of adipose tissue-related pathways.
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Affiliation(s)
- Abderaouf Damouche
- Université Paris Sud, UMR 1184, Le Kremlin-Bicêtre, France
- CEA, DSV/iMETI, IDMIT, Fontenay-aux-Roses, France
- INSERM, U1184, Immunology of Viral Infections and Autoimmune Diseases, Le Kremlin-Bicêtre, France
| | - Thierry Lazure
- Assistance Publique-Hôpitaux de Paris, Hôpital Bicêtre, Service d’anatomo-pathologie, Le Kremlin-Bicêtre, France
| | - Véronique Avettand-Fènoël
- Université Paris Descartes, Sorbonne Paris Cité, Faculté de Médecine, EA 7327, Paris, France
- Assistance Publique—Hôpitaux de Paris, Hôpital Necker-Enfants Malades, Laboratoire de Virologie, Paris, France
| | - Nicolas Huot
- Institut Pasteur, Unité HIV, Inflammation et Persistance, Paris, France
| | | | - Anne-Pascale Satie
- INSERM, U1085-IRSET, Université de Rennes 1, Campus de Beaulieu, Rennes, France
| | - Adeline Mélard
- Université Paris Descartes, Sorbonne Paris Cité, Faculté de Médecine, EA 7327, Paris, France
- Assistance Publique—Hôpitaux de Paris, Hôpital Necker-Enfants Malades, Laboratoire de Virologie, Paris, France
| | - Ludivine David
- Université Paris Descartes, Sorbonne Paris Cité, Faculté de Médecine, EA 7327, Paris, France
- Assistance Publique—Hôpitaux de Paris, Hôpital Necker-Enfants Malades, Laboratoire de Virologie, Paris, France
| | | | - Jade Ghosn
- Université Paris Descartes, Sorbonne Paris Cité, Faculté de Médecine, EA 7327, Paris, France
| | - Nicolas Noel
- Université Paris Sud, UMR 1184, Le Kremlin-Bicêtre, France
- CEA, DSV/iMETI, IDMIT, Fontenay-aux-Roses, France
- INSERM, U1184, Immunology of Viral Infections and Autoimmune Diseases, Le Kremlin-Bicêtre, France
- Assistance Publique—Hôpitaux de Paris, Hôpital Bicêtre, Service de Médecine Interne et Immunologie clinique, Le Kremlin-Bicêtre, France
| | - Guillaume Pourcher
- Assistance Publique—Hôpitaux de Paris, Hôpital Béclère, Service de Chirurgie Viscérale Minimale invasive, Clamart, France
- INSERM U972, Hôpital Paul Brousse, Villejuif, France
| | - Valérie Martinez
- Assistance Publique—Hôpitaux de Paris, Hôpital Antoine Béclère, Service de Médecine Interne et Immunologie clinique, Clamart, France
| | - Stéphane Benoist
- Assistance Publique—Hôpitaux de Paris, Hôpital Bicêtre, Service de Chirurgie générale et digestive, Le Kremlin-Bicêtre, France
| | - Véronique Béréziat
- INSERM UMR S938, CDR Saint-Antoine; Sorbonne Universités, UPMC Univ Paris 6, Paris, France
- Assistance Publique—Hôpitaux de Paris, Hôpital Tenon, Service de Biochimie et Hormonologie; ICAN, Institute of Cardiometabolism and Nutrition, Paris, France
| | - Antonio Cosma
- Université Paris Sud, UMR 1184, Le Kremlin-Bicêtre, France
- CEA, DSV/iMETI, IDMIT, Fontenay-aux-Roses, France
- INSERM, U1184, Immunology of Viral Infections and Autoimmune Diseases, Le Kremlin-Bicêtre, France
| | - Benoit Favier
- Université Paris Sud, UMR 1184, Le Kremlin-Bicêtre, France
- CEA, DSV/iMETI, IDMIT, Fontenay-aux-Roses, France
- INSERM, U1184, Immunology of Viral Infections and Autoimmune Diseases, Le Kremlin-Bicêtre, France
| | - Bruno Vaslin
- Université Paris Sud, UMR 1184, Le Kremlin-Bicêtre, France
- CEA, DSV/iMETI, IDMIT, Fontenay-aux-Roses, France
- INSERM, U1184, Immunology of Viral Infections and Autoimmune Diseases, Le Kremlin-Bicêtre, France
| | - Christine Rouzioux
- Université Paris Descartes, Sorbonne Paris Cité, Faculté de Médecine, EA 7327, Paris, France
- Assistance Publique—Hôpitaux de Paris, Hôpital Necker-Enfants Malades, Laboratoire de Virologie, Paris, France
| | - Jacqueline Capeau
- INSERM UMR S938, CDR Saint-Antoine; Sorbonne Universités, UPMC Univ Paris 6, Paris, France
- Assistance Publique—Hôpitaux de Paris, Hôpital Tenon, Service de Biochimie et Hormonologie; ICAN, Institute of Cardiometabolism and Nutrition, Paris, France
| | | | - Nathalie Dereuddre-Bosquet
- Université Paris Sud, UMR 1184, Le Kremlin-Bicêtre, France
- CEA, DSV/iMETI, IDMIT, Fontenay-aux-Roses, France
- INSERM, U1184, Immunology of Viral Infections and Autoimmune Diseases, Le Kremlin-Bicêtre, France
| | - Roger Le Grand
- Université Paris Sud, UMR 1184, Le Kremlin-Bicêtre, France
- CEA, DSV/iMETI, IDMIT, Fontenay-aux-Roses, France
- INSERM, U1184, Immunology of Viral Infections and Autoimmune Diseases, Le Kremlin-Bicêtre, France
| | - Olivier Lambotte
- Université Paris Sud, UMR 1184, Le Kremlin-Bicêtre, France
- CEA, DSV/iMETI, IDMIT, Fontenay-aux-Roses, France
- INSERM, U1184, Immunology of Viral Infections and Autoimmune Diseases, Le Kremlin-Bicêtre, France
- Assistance Publique—Hôpitaux de Paris, Hôpital Bicêtre, Service de Médecine Interne et Immunologie clinique, Le Kremlin-Bicêtre, France
| | - Christine Bourgeois
- Université Paris Sud, UMR 1184, Le Kremlin-Bicêtre, France
- CEA, DSV/iMETI, IDMIT, Fontenay-aux-Roses, France
- INSERM, U1184, Immunology of Viral Infections and Autoimmune Diseases, Le Kremlin-Bicêtre, France
- * E-mail:
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Grant RW, Stephens JM. Fat in flames: influence of cytokines and pattern recognition receptors on adipocyte lipolysis. Am J Physiol Endocrinol Metab 2015; 309:E205-13. [PMID: 26058863 DOI: 10.1152/ajpendo.00053.2015] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [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: 02/05/2015] [Accepted: 06/03/2015] [Indexed: 12/26/2022]
Abstract
Adipose tissue has the largest capacity to store energy in the body and provides energy through the release of free fatty acids during times of energy need. Different types of immune cells are recruited to adipose tissue under various physiological conditions, indicating that these cells contribute to the regulation of adipose tissue. One major pathway influenced by a number of immune cells is the release of free fatty acids through lipolysis during both physiological (e.g., cold stress) and pathophysiological processes (e.g., obesity, type 2 diabetes). Adipose tissue expansion during obesity leads to immune cell infiltration and adipose tissue remodeling, a homeostatic process that promotes inflammation in adipose tissue. The release of proinflammatory cytokines stimulates lipolysis and causes insulin resistance, leading to adipose tissue dysfunction and systemic disruptions of metabolism. This review focuses on the interactions of cytokines and other inflammatory molecules that regulate adipose tissue lipolysis during physiological and pathophysiological states.
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Affiliation(s)
- Ryan W Grant
- Department of Nutrition Science, Purdue University, West Lafayette, Indiana
| | - Jacqueline M Stephens
- Adipocyte Biology Lab, Pennington Biomedical Research Center, Baton Rouge, Louisiana; and Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana
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38
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Choi EK, Park HJ, Sul OJ, Rajasekaran M, Yu R, Choi HS. Carbon monoxide reverses adipose tissue inflammation and insulin resistance upon loss of ovarian function. Am J Physiol Endocrinol Metab 2015; 308:E621-30. [PMID: 25714672 DOI: 10.1152/ajpendo.00458.2014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [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: 10/07/2014] [Accepted: 02/19/2015] [Indexed: 11/22/2022]
Abstract
We hypothesized that carbon monoxide (CO) might suppress chronic inflammation, which led to metabolic disturbances. Ovariectomy (OVX) was performed in mice to mimic chronic inflammation secondary to loss of ovarian function. OVX increased fat mass and the infiltration of highly inflammatory CD11c cells into adipose tissue (AT), resulting in a disturbance of glucose metabolism. Treatment of CO attenuated these; CO decreased recruitment of CD11c-expressing cells in AT and reduced expression of CD11c in bone marrow-derived macrophages, protecting them from M1 polarization. Upregulated cGMP and decreased reactive oxygen species were responsible for the inhibitory activity of CO on CD11c expression; knockdown of soluble guanylate cyclase or heme oxygenase-1 using small interfering RNAs reduced this inhibition substantially. Improved OVX-induced insulin resistance (IR) by CO was highly associated with its activity to attenuate AT inflammation. Our results suggest a therapeutic value of CO to treat postmenopausal IR by reducing AT inflammation.
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MESH Headings
- Adipose Tissue, White/drug effects
- Adipose Tissue, White/immunology
- Adipose Tissue, White/metabolism
- Adipose Tissue, White/pathology
- Adiposity/drug effects
- Aging
- Animals
- Antimetabolites/pharmacology
- Carbon Monoxide/pharmacology
- Cells, Cultured
- Cyclic GMP/agonists
- Cyclic GMP/metabolism
- Female
- Guanylate Cyclase/antagonists & inhibitors
- Guanylate Cyclase/genetics
- Guanylate Cyclase/metabolism
- Heme Oxygenase-1/antagonists & inhibitors
- Heme Oxygenase-1/genetics
- Heme Oxygenase-1/metabolism
- Injections, Intraperitoneal
- Insulin Resistance
- Macrophages/drug effects
- Macrophages/immunology
- Macrophages/metabolism
- Membrane Proteins/antagonists & inhibitors
- Membrane Proteins/genetics
- Membrane Proteins/metabolism
- Mice, Inbred C57BL
- Organometallic Compounds/administration & dosage
- Organometallic Compounds/pharmacology
- Organometallic Compounds/therapeutic use
- Ovariectomy/adverse effects
- Panniculitis/immunology
- Panniculitis/metabolism
- Panniculitis/pathology
- Panniculitis/prevention & control
- Prodrugs/administration & dosage
- Prodrugs/pharmacology
- Prodrugs/therapeutic use
- RNA Interference
- Reactive Oxygen Species/antagonists & inhibitors
- Reactive Oxygen Species/metabolism
- Receptors, Cytoplasmic and Nuclear/antagonists & inhibitors
- Receptors, Cytoplasmic and Nuclear/genetics
- Receptors, Cytoplasmic and Nuclear/metabolism
- Soluble Guanylyl Cyclase
- Specific Pathogen-Free Organisms
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Affiliation(s)
- Eun-Kyung Choi
- Department of Biological Sciences, University of Ulsan, Ulsan, South Korea; and
| | - Hyun-Jung Park
- Department of Biological Sciences, University of Ulsan, Ulsan, South Korea; and
| | - Ok-Joo Sul
- Department of Biological Sciences, University of Ulsan, Ulsan, South Korea; and
| | - Monisha Rajasekaran
- Department of Biological Sciences, University of Ulsan, Ulsan, South Korea; and
| | - Rina Yu
- Department of Food Science and Nutrition, University of Ulsan, Ulsan, South Korea
| | - Hye-Seon Choi
- Department of Biological Sciences, University of Ulsan, Ulsan, South Korea; and
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39
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Kayser BD, Goran MI, Bouret SG. Perinatal overnutrition exacerbates adipose tissue inflammation caused by high-fat feeding in C57BL/6J mice. PLoS One 2015; 10:e0121954. [PMID: 25835281 PMCID: PMC4383546 DOI: 10.1371/journal.pone.0121954] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [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] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Accepted: 02/06/2015] [Indexed: 12/24/2022] Open
Abstract
Obesity causes white adipose tissue (WAT) inflammation and insulin resistance in some, but not all individuals. Here, we used a mouse model of early postnatal overfeeding to determine the role of neonatal nutrition in lifelong WAT inflammation and metabolic dysfunction. C57BL/6J mice were reared in small litters of 3 (SL) or normal litters of 7 pups (NL) and fed either regular chow or a 60% high fat diet (HFD) from 5 to 17 weeks. At weaning, SL mice did not develop WAT inflammation despite increased fat mass, although there was an up-regulation of WAT Arg1 and Tlr4 expression. On HFD, adult SL mice had greater inguinal fat mass compared to NL mice, however both groups showed similar increases in visceral fat depots and adipocyte hypertrophy. Despite the similar levels of visceral adiposity, SL-HFD mice displayed greater impairments in glucose homeostasis and more pronounced hepatic steatosis compared to NL-HFD mice. In addition, WAT from SL mice fed a HFD displayed greater crown-like structure formation, increased M1 macrophages, and higher cytokine gene expression. Together, these data suggest that early postnatal overnutrition may be a critical determinant of fatty liver and insulin resistance in obese adults by programming the inflammatory capacity of adipose tissue.
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Affiliation(s)
- Brandon D. Kayser
- Human and Evolutionary Biology Program, Department of Biological Sciences, Dornsife College of Letters, Arts and Sciences, University of Southern California, Los Angeles, California, United States of America
- Department of Preventive Medicine, Keck School of Medicine, Childhood Obesity Research Center, University of Southern California, Los Angeles, California, United States of America
| | - Michael I. Goran
- Department of Preventive Medicine, Keck School of Medicine, Childhood Obesity Research Center, University of Southern California, Los Angeles, California, United States of America
| | - Sebastien G. Bouret
- Developmental Neuroscience Program, The Saban Research Institute, Children’s Hospital Los Angeles, University of Southern California, Los Angeles, California, United States of America
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40
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Holmes D. Metabolism. Hepatic insulin resistance--missing link identified. Nat Rev Endocrinol 2015; 11:193. [PMID: 25707785 DOI: 10.1038/nrendo.2015.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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41
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Gao Z, Zhang J, Henagan TM, Lee JH, Ye X, Wang H, Ye J. P65 inactivation in adipocytes and macrophages attenuates adipose inflammatory response in lean but not in obese mice. Am J Physiol Endocrinol Metab 2015; 308:E496-505. [PMID: 25564477 PMCID: PMC4360014 DOI: 10.1152/ajpendo.00532.2014] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
NF-κB induces transcriptional expression of proinflammatory genes and antiapoptotic genes. The two activities of NF-κB remain to be characterized in the mechanism of chronic inflammation in obesity. To address this issue, we inactivated NF-κB in adipose tissue by knocking out p65 (RelA) in mice (F-p65-KO) and examined the inflammation in lean and obese conditions. In the lean condition, KO mice exhibited a reduced inflammation in adipose tissue with a decrease in macrophage infiltration, M1 polarization, and proinflammatory cytokine expression. In the obese condition, KO mice had elevated inflammation with more macrophage infiltration, M1 polarization, and cytokine expression. In the mechanism of enhanced inflammation, adipocytes and macrophages exhibited an increase in cellular apoptosis, which was observed with more formation of crown-like structures (CLS) in fat tissue of KO mice. Body weight, glucose metabolism, and insulin sensitivity were not significantly altered in KO mice under the lean and obese conditions. A modest but significant reduction in body fat mass was observed in KO mice on HFD with an elevation in energy expenditure. The data suggest that in the control of adipose inflammation, NF-κB exhibits different activities in the lean vs. obese condition. NF-κB is required for expression of proinflammatory genes in the lean but not in the obese condition. NF-κB is required for inhibition of apoptosis in the obese condition, in which proinflammation is enhanced by NF-κB inactivation.
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Affiliation(s)
- Zhanguo Gao
- School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, Henan Province, China; Antioxidant and Gene Regulation Laboratory, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, Louisiana
| | - Jin Zhang
- Antioxidant and Gene Regulation Laboratory, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, Louisiana
| | - Tara M Henagan
- Antioxidant and Gene Regulation Laboratory, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, Louisiana; Department of Nutrition Science, Purdue University, West Lafayette, Indiana; and
| | - Jong Han Lee
- Antioxidant and Gene Regulation Laboratory, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, Louisiana
| | - Xin Ye
- Antioxidant and Gene Regulation Laboratory, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, Louisiana
| | - Hui Wang
- School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, Henan Province, China; Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine in Henan Province, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, China
| | - Jianping Ye
- Antioxidant and Gene Regulation Laboratory, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, Louisiana;
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42
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Revelo XS, Tsai S, Lei H, Luck H, Ghazarian M, Tsui H, Shi SY, Schroer S, Luk CT, Lin GHY, Mak TW, Woo M, Winer S, Winer DA. Perforin is a novel immune regulator of obesity-related insulin resistance. Diabetes 2015; 64:90-103. [PMID: 25048196 DOI: 10.2337/db13-1524] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Obesity-related insulin resistance is associated with an influx of pathogenic T cells into visceral adipose tissue (VAT), but the mechanisms regulating lymphocyte balance in such tissues are unknown. Here we describe an important role for the immune cytotoxic effector molecule perforin in regulating this process. Perforin-deficient mice (Prf1(null)) show early increased body weight and adiposity, glucose intolerance, and insulin resistance when placed on high-fat diet (HFD). Regulatory effects of perforin on glucose tolerance are mechanistically linked to the control of T-cell proliferation and cytokine production in inflamed VAT. HFD-fed Prf1(null) mice have increased accumulation of proinflammatory IFN-γ-producing CD4(+) and CD8(+) T cells and M1-polarized macrophages in VAT. CD8(+) T cells from the VAT of Prf1(null) mice have increased proliferation and impaired early apoptosis, suggesting a role for perforin in the regulation of T-cell turnover during HFD feeding. Transfer of CD8(+) T cells from Prf1(null) mice into CD8-deficient mice (CD8(null)) resulted in worsening of metabolic parameters compared with wild-type donors. Improved metabolic parameters in HFD natural killer (NK) cell-deficient mice (NK(null)) ruled out a role for NK cells as a single source of perforin in regulating glucose homeostasis. The findings support the importance of T-cell function in insulin resistance and suggest that modulation of lymphocyte homeostasis in inflamed VAT is one possible avenue for therapeutic intervention.
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Affiliation(s)
- Xavier S Revelo
- Division of Cellular and Molecular Biology, Diabetes Research Group, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Sue Tsai
- Division of Cellular and Molecular Biology, Diabetes Research Group, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Helena Lei
- Division of Cellular and Molecular Biology, Diabetes Research Group, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Helen Luck
- Division of Cellular and Molecular Biology, Diabetes Research Group, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Magar Ghazarian
- Division of Cellular and Molecular Biology, Diabetes Research Group, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Hubert Tsui
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Sally Y Shi
- Division of Cellular and Molecular Biology, Diabetes Research Group, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Stephanie Schroer
- Division of Cellular and Molecular Biology, Diabetes Research Group, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Cynthia T Luk
- Division of Cellular and Molecular Biology, Diabetes Research Group, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Gloria H Y Lin
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - Tak W Mak
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - Minna Woo
- Division of Cellular and Molecular Biology, Diabetes Research Group, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada Division of Endocrinology and Metabolism, Department of Medicine, University Health Network, Toronto, Ontario, Canada
| | - Shawn Winer
- Division of Cellular and Molecular Biology, Diabetes Research Group, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada Department of Pathology, University Health Network, Toronto, Ontario, Canada
| | - Daniel A Winer
- Division of Cellular and Molecular Biology, Diabetes Research Group, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada Department of Pathology, University Health Network, Toronto, Ontario, Canada
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43
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Hand LE, Usan P, Cooper GJS, Xu LY, Ammori B, Cunningham PS, Aghamohammadzadeh R, Soran H, Greenstein A, Loudon ASI, Bechtold DA, Ray DW. Adiponectin induces A20 expression in adipose tissue to confer metabolic benefit. Diabetes 2015; 64:128-36. [PMID: 25190567 PMCID: PMC4396702 DOI: 10.2337/db13-1835] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Obesity is a major risk factor for metabolic disease, with white adipose tissue (WAT) inflammation emerging as a key underlying pathology. We detail that mice lacking Reverbα exhibit enhanced fat storage without the predicted increased WAT inflammation or loss of insulin sensitivity. In contrast to most animal models of obesity and obese human patients, Reverbα(-/-) mice exhibit elevated serum adiponectin levels and increased adiponectin secretion from WAT explants in vitro, highlighting a potential anti-inflammatory role of this adipokine in hypertrophic WAT. Indeed, adiponectin was found to suppress primary macrophage responses to lipopolysaccharide and proinflammatory fatty acids, and this suppression depended on glycogen synthase kinase 3β activation and induction of A20. Attenuated inflammatory responses in Reverbα(-/-) WAT depots were associated with tonic elevation of A20 protein and ex vivo shown to depend on A20. We also demonstrate that adipose A20 expression in obese human subjects exhibits a negative correlation with measures of insulin sensitivity. Furthermore, bariatric surgery-induced weight loss was accompanied by enhanced WAT A20 expression, which is positively correlated with increased serum adiponectin and improved metabolic and inflammatory markers, including C-reactive protein. The findings identify A20 as a mediator of adiponectin anti-inflammatory action in WAT and a potential target for mitigating obesity-related pathology.
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Affiliation(s)
- Laura E Hand
- Faculty of Life Sciences, University of Manchester, Manchester, U.K
| | - Paola Usan
- Faculty of Medical and Health Sciences, University of Manchester, Manchester, U.K
| | - Garth J S Cooper
- Faculty of Medical and Health Sciences, University of Manchester, Manchester, U.K. School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Lance Y Xu
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Basil Ammori
- Centre for Advanced Discovery and Experimental Therapeutics, University of Manchester, Manchester, U.K
| | | | - Reza Aghamohammadzadeh
- Centre for Advanced Discovery and Experimental Therapeutics, University of Manchester, Manchester, U.K
| | - Handrean Soran
- Centre for Advanced Discovery and Experimental Therapeutics, University of Manchester, Manchester, U.K
| | - Adam Greenstein
- Centre for Advanced Discovery and Experimental Therapeutics, University of Manchester, Manchester, U.K
| | | | - David A Bechtold
- Faculty of Life Sciences, University of Manchester, Manchester, U.K.
| | - David W Ray
- Faculty of Medical and Health Sciences, University of Manchester, Manchester, U.K.
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44
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Agilli M, Aydin FN, Kurt YG, Cayci T. Letter to the editor: methodological approach to paraoxonase-1 activity in obesity complicated by obstructive sleep apnea. J Clin Endocrinol Metab 2015; 100:L11. [PMID: 25559536 DOI: 10.1210/jc.2014-4044] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Affiliation(s)
- Mehmet Agilli
- Department of Biochemistry Agri Military Hospital Agri Turkey
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45
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Soran H, Yadav R, Ammori B, Durrington P. Response letter to the editor. J Clin Endocrinol Metab 2015; 100:L12. [PMID: 25559537 DOI: 10.1210/jc.2014-4212] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Handrean Soran
- Cardiovascular Research Group Core Technologies Facility University of Manchester Manchester UK
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46
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Bandyopadhyay GK, Lu M, Avolio E, Siddiqui JA, Gayen JR, Wollam J, Vu CU, Chi NW, O'Connor DT, Mahata SK. Pancreastatin-dependent inflammatory signaling mediates obesity-induced insulin resistance. Diabetes 2015; 64:104-16. [PMID: 25048197 DOI: 10.2337/db13-1747] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Chromogranin A knockout (Chga-KO) mice exhibit enhanced insulin sensitivity despite obesity. Here, we probed the role of the chromogranin A-derived peptide pancreastatin (PST: CHGA(273-301)) by investigating the effect of diet-induced obesity (DIO) on insulin sensitivity of these mice. We found that on a high-fat diet (HFD), Chga-KO mice (KO-DIO) remain more insulin sensitive than wild-type DIO (WT-DIO) mice. Concomitant with this phenotype is enhanced Akt and AMPK signaling in muscle and white adipose tissue (WAT) as well as increased FoxO1 phosphorylation and expression of mature Srebp-1c in liver and downregulation of the hepatic gluconeogenic genes, Pepck and G6pase. KO-DIO mice also exhibited downregulation of cytokines and proinflammatory genes and upregulation of anti-inflammatory genes in WAT, and peritoneal macrophages from KO mice displayed similarly reduced proinflammatory gene expression. The insulin-sensitive, anti-inflammatory phenotype of KO-DIO mice is masked by supplementing PST. Conversely, a PST variant peptide PSTv1 (PST-NΔ3: CHGA(276-301)), lacking PST activity, simulated the KO phenotype by sensitizing WT-DIO mice to insulin. In summary, the reduced inflammation due to PST deficiency prevented the development of insulin resistance in KO-DIO mice. Thus, obesity manifests insulin resistance only in the presence of PST, and in its absence obesity is dissociated from insulin resistance.
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Affiliation(s)
- Gautam K Bandyopadhyay
- VA San Diego Healthcare System, San Diego, CA Department of Medicine, University of California, San Diego, San Diego, CA
| | - Minh Lu
- VA San Diego Healthcare System, San Diego, CA
| | - Ennio Avolio
- Department of Medicine, University of California, San Diego, San Diego, CA
| | | | | | - Joshua Wollam
- Department of Medicine, University of California, San Diego, San Diego, CA
| | - Christine U Vu
- Department of Medicine, University of California, San Diego, San Diego, CA
| | - Nai-Wen Chi
- VA San Diego Healthcare System, San Diego, CA Department of Medicine, University of California, San Diego, San Diego, CA
| | - Daniel T O'Connor
- VA San Diego Healthcare System, San Diego, CA Department of Medicine, University of California, San Diego, San Diego, CA
| | - Sushil K Mahata
- VA San Diego Healthcare System, San Diego, CA Department of Medicine, University of California, San Diego, San Diego, CA
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47
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Hayashi M, Takeshita K, Uchida Y, Yamamoto K, Kikuchi R, Nakayama T, Nomura E, Cheng XW, Matsushita T, Nakamura S, Murohara T. Angiotensin II receptor blocker ameliorates stress-induced adipose tissue inflammation and insulin resistance. PLoS One 2014; 9:e116163. [PMID: 25551221 PMCID: PMC4281136 DOI: 10.1371/journal.pone.0116163] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Accepted: 12/03/2014] [Indexed: 12/18/2022] Open
Abstract
A strong causal link exists between psychological stress and insulin resistance as well with hypertension. Meanwhile, stress-related responses play critical roles in glucose metabolism in hypertensive patients. As clinical trials suggest that angiotensin-receptor blocker delays the onset of diabetes in hypertensive patients, we investigated the effects of irbesartan on stress-induced adipose tissue inflammation and insulin resistance. C57BL/6J mice were subjected to 2-week intermittent restraint stress and orally treated with vehicle, 3 and 10 mg/kg/day irbesartan. The plasma concentrations of lipid and proinflammatory cytokines [Monocyte Chemoattractant Protein-1 (MCP-1), tumor necrosis factor-α, and interleukin-6] were assessed with enzyme-linked immunosorbent assay. Monocyte/macrophage accumulation in inguinal white adipose tissue (WAT) was observed with CD11b-positive cell counts and mRNA expressions of CD68 and F4/80 using immunohistochemistry and RT-PCR methods respectively. The mRNA levels of angiotensinogen, proinflammatory cytokines shown above, and adiponectin in WAT were also assessed with RT-PCR method. Glucose metabolism was assessed by glucose tolerance tests (GTTs) and insulin tolerance tests, and mRNA expression of insulin receptor substrate-1 (IRS-1) and glucose transporter 4 (GLUT4) in WAT. Restraint stress increased monocyte accumulation, plasma free fatty acids, expression of angiotensinogen and proinflammatory cytokines including MCP-1, and reduced adiponectin. Irbesartan reduced stress-induced monocyte accumulation in WAT in a dose dependent manner. Irbesartan treatment also suppressed induction of adipose angiotensinogen and proinflammatory cytokines in WAT and blood, and reversed changes in adiponectin expression. Notably, irbesartan suppressed stress-induced reduction in adipose tissue weight and free fatty acid release, and improved insulin tolerance with restoration of IRS-1 and GLUT4 mRNA expressions in WAT. The results indicate that irbesartan improves stress-induced adipose tissue inflammation and insulin resistance. Our results suggests that irbesartan treatment exerts additive benefits for glucose metabolism in hypertensive patients with mental stress.
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Affiliation(s)
- Motoharu Hayashi
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kyosuke Takeshita
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
- Department of Clinical Laboratory, Nagoya University Hospital, Nagoya, Japan
- * E-mail:
| | - Yasuhiro Uchida
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Koji Yamamoto
- Department of Blood Transfusion, Nagoya University Hospital, Nagoya, Japan
| | - Ryosuke Kikuchi
- Department of Clinical Laboratory, Nagoya University Hospital, Nagoya, Japan
| | - Takayuki Nakayama
- Department of Blood Transfusion, Aichi Medical University Hospital, Nagakute, Japan
| | - Emiko Nomura
- Department of Blood Transfusion, Nagoya University Hospital, Nagoya, Japan
| | - Xian Wu Cheng
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Tadashi Matsushita
- Department of Blood Transfusion, Nagoya University Hospital, Nagoya, Japan
| | - Shigeo Nakamura
- Department of Pathology, Nagoya University Hospital, Nagoya, Japan
| | - Toyoaki Murohara
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Yadav R, France M, Aghamohammadzadeh R, Liu Y, Hama S, Kwok S, Schofield J, Turkington P, Syed AA, Malik R, Pemberton P, Greenstein A, Durrington P, Ammori B, Gibson M, Jeziorska M, Soran H. Impairment of high-density lipoprotein resistance to lipid peroxidation and adipose tissue inflammation in obesity complicated by obstructive sleep apnea. J Clin Endocrinol Metab 2014; 99:3390-8. [PMID: 24823455 DOI: 10.1210/jc.2013-3939] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
CONTEXT Obstructive sleep apnea (OSA) complicates morbid obesity and is associated with increased cardiovascular disease incidence. An increase in the circulating markers of chronic inflammation and dysfunctional high-density lipoprotein (HDL) occur in severe obesity. OBJECTIVE The objective of the study was to establish whether the effects of obesity on inflammation and HDL dysfunction are more marked when complicated by OSA. DESIGN AND PATIENTS Morbidly obese patients (n = 41) were divided into those whose apnea-hypoapnea index (AHI) was more or less than the median value and on the presence of OSA [OSA and no OSA (nOSA) groups]. We studied the antioxidant function of HDL and measured serum paraoxonase 1 (PON1) activity, TNFα, and intercellular adhesion molecule 1 (ICAM-1) levels in these patients. In a subset of 19 patients, we immunostained gluteal sc adipose tissue (SAT) for TNFα, macrophages, and measured adipocyte size. RESULTS HDL lipid peroxide levels were higher and serum PON1 activity was lower in the high AHI group vs the low AHI group (P < .05 and P < .0001, respectively) and in the OSA group vs the nOSA group (P = .005 and P < .05, respectively). Serum TNFα and ICAM-1 levels and TNFα immunostaining in SAT increased with the severity of OSA. Serum PON1 activity was inversely correlated with AHI (r = -0.41, P < .03) in the OSA group. TNFα expression in SAT directly correlated with AHI (r = 0.53, P < .03) in the subset of 19 patients from whom a biopsy was obtained. CONCLUSION Increased serum TNFα, ICAM-1, and TNFα expression in SAT provide a mechanistic basis for enhanced inflammation in patients with OSA. Decreased serum PON1 activity, impaired HDL antioxidant function, and increased adipose tissue inflammation in these patients could be a mechanism for HDL and endothelial dysfunction.
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Affiliation(s)
- Rahul Yadav
- Cardiovascular Research Group (R.Y., M.F., R.A., Y.L., S.H., S.K., J.S., R.M., A.G., P.D., M.J., H.S.), Core Technologies Facility, University of Manchester, Manchester M13 9PT, United Kingdom; Cardiovascular Trials Unit (R.Y., M.F. S.K., J.S., H.S.) and Department of Clinical Biochemistry (M.F., P.P.), Central Manchester University Hospitals, National Health Service Foundation Trust, Manchester M13 9WL, United Kingdom; and Departments of Medicine (P.T., A.A.S.) and Surgery (B.A.), the North West Diabetes Local Research Network (M.G.), Salford Royal National Health Service Foundation Trust, Salford M6 8HD, United Kingdom
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49
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Alnaeeli M, Raaka BM, Gavrilova O, Teng R, Chanturiya T, Noguchi CT. Erythropoietin signaling: a novel regulator of white adipose tissue inflammation during diet-induced obesity. Diabetes 2014; 63:2415-31. [PMID: 24647735 PMCID: PMC4066343 DOI: 10.2337/db13-0883] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [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
Obesity-induced white adipose tissue (WAT) inflammation and insulin resistance are associated with macrophage (Mф) infiltration and phenotypic shift from "anti-inflammatory" M2-like to predominantly "proinflammatory" M1-like cells. Erythropoietin (EPO), a glycoprotein hormone indispensable for erythropoiesis, has biological activities that extend to nonerythroid tissues, including antiapoptotic and anti-inflammatory effects. Using comprehensive in vivo and in vitro analyses in mice, EPO treatment inhibited WAT inflammation, normalized insulin sensitivity, and reduced glucose intolerance. We investigated EPO receptor (EPO-R) expression in WAT and characterized the role of its signaling during obesity-induced inflammation. Remarkably, and prior to any detectable changes in body weight or composition, EPO treatment reduced M1-like Mф and increased M2-like Mф in WAT, while decreasing inflammatory monocytes. These anti-inflammatory effects were found to be driven, at least in part, by direct EPO-R response in Mф via Stat3 activation, where EPO effects on M2 but not M1 Mф required interleukin-4 receptor/Stat6. Using obese ∆EpoR mice with EPO-R restricted to erythroid cells, we demonstrated an anti-inflammatory role for endogenous EPO. Collectively, our findings identify EPO-R signaling as a novel regulator of WAT inflammation, extending its nonerythroid activity to encompass effects on both Mф infiltration and subset composition in WAT.
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Affiliation(s)
- Mawadda Alnaeeli
- Molecular Medicine Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD
| | - Bruce M Raaka
- Laboratory of Endocrinology and Receptor Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD
| | - Oksana Gavrilova
- Mouse Metabolism Core Facility, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD
| | - Ruifeng Teng
- Mouse Metabolism Core Facility, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD
| | - Tatyana Chanturiya
- Mouse Metabolism Core Facility, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD
| | - Constance Tom Noguchi
- Molecular Medicine Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD
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50
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Abstract
Adipose dysfunction resulting from chronic inflammation and impaired adipogenesis has increasingly been recognized as a major contributor to obesity-mediated insulin resistance, but the molecular mechanisms that maintain healthy adipocytes and limit adipose inflammation remain unclear. Here, we used genetic and pharmacological approaches to delineate a novel role for sphingosine kinase 1 (SK1) in metabolic disorders associated with obesity. SK1 phosphorylates sphingosine to form sphingosine 1 phosphate (S1P), a bioactive sphingolipid with numerous roles in inflammation. SK1 mRNA expression was increased in adipose tissue of diet-induced obese (DIO) mice and obese type 2 diabetic humans. In DIO mice, SK1 deficiency increased markers of adipogenesis and adipose gene expression of the anti-inflammatory molecules IL-10 and adiponectin and reduced adipose tissue macrophage (ATM) recruitment and proinflammatory molecules TNFα and IL-6. These changes were associated with enhanced insulin signaling in adipose and muscle and improved systemic insulin sensitivity and glucose tolerance in SK1(-/-) mice. Specific pharmacological inhibition of SK1 in WT DIO mice also reduced adipocyte and ATM inflammation and improved overall glucose homeostasis. These data suggest that the SK1-S1P axis could be an attractive target for the development of treatments to ameliorate adipose inflammation and insulin resistance associated with obesity and type 2 diabetes.
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Affiliation(s)
- Jing Wang
- Department of Cell Biology, Torrey Pines Institute for Molecular Studies, San Diego, California
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