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Hong L, Zahradka P, Taylor CG. Differential Modulation by Eicosapentaenoic Acid (EPA) and Docosahexaenoic Acid (DHA) of Mesenteric Fat and Macrophages and T Cells in Adipose Tissue of Obese fa/ fa Zucker Rats. Nutrients 2024; 16:1311. [PMID: 38732558 PMCID: PMC11085824 DOI: 10.3390/nu16091311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 04/25/2024] [Accepted: 04/25/2024] [Indexed: 05/13/2024] Open
Abstract
Polyunsaturated fatty acids (PUFAs) can alter adipose tissue function; however, the relative effects of plant and marine n3-PUFAs are less clear. Our objective was to directly compare the n3-PUFAs, plant-based α-linolenic acid (ALA) in flaxseed oil, and marine-based eicosapentaenoic acid (EPA) or docosahexaenoic acid (DHA) in high-purity oils versus n6-PUFA containing linoleic acid (LA) for their effects on the adipose tissue and oral glucose tolerance of obese rats. Male fa/fa Zucker rats were assigned to faALA, faEPA, faDHA, and faLA groups and compared to baseline fa/fa rats (faBASE) and lean Zucker rats (lnLA). After 8 weeks, faEPA and faDHA had 11-14% lower body weight than faLA. The oral glucose tolerance and total body fat were unchanged, but faEPA had less mesenteric fat. faEPA and faDHA had fewer large adipocytes compared to faLA and faALA. EPA reduced macrophages in the adipose tissue of fa/fa rats compared to ALA and DHA, while faLA had the greatest macrophage infiltration. DHA decreased (~10-fold) T-cell infiltration compared to faBASE and faEPA, whereas faALA and faLA had an ~40% increase. The n3-PUFA diets attenuated tumour necrosis factor-α in adipose tissue compared to faBASE, while it was increased by LA in both genotypes. In conclusion, EPA and DHA target different aspects of inflammation in adipose tissue.
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Affiliation(s)
- Lena Hong
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada;
| | - Peter Zahradka
- Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada;
- Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
| | - Carla G. Taylor
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada;
- Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
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Chen L, Li L, Cui D, Huang Y, Tong H, Zabihi H, Wang S, Qi Y, Lakowski T, Leng L, Liu S, Wu H, Young LH, Bucala R, Qi D. Extracellular macrophage migration inhibitory factor (MIF) downregulates adipose hormone-sensitive lipase (HSL) and contributes to obesity. Mol Metab 2024; 79:101834. [PMID: 37935315 PMCID: PMC10700858 DOI: 10.1016/j.molmet.2023.101834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 10/21/2023] [Accepted: 11/02/2023] [Indexed: 11/09/2023] Open
Abstract
Attenuation of adipose hormone sensitive lipase (HSL) may impair lipolysis and exacerbate obesity. We investigate the role of cytokine, macrophage migration inhibitory factor (MIF) in regulating adipose HSL and adipocyte hypertrophy. Extracellular MIF downregulates HSL in an autocrine fashion, by activating the AMPK/JNK signaling pathway upon binding to its membrane receptor, CD74. WT mice fed high fat diet (HFD), as well as mice overexpressing MIF, both had high circulating MIF levels and showed suppression of HSL during the development of obesity. Blocking the extracellular action of MIF by a neutralizing MIF antibody significantly reduced obesity in HFD mice. Interestingly, intracellular MIF binds with COP9 signalosome subunit 5 (Csn5) and JNK, which leads to an opposing effect to inhibit JNK phosphorylation. With global MIF deletion, adipocyte JNK phosphorylation increased, resulting in decreased HSL expression, suggesting that the loss of MIF's intracellular inhibitory action on JNK was dominant in Mif-/- mice. Adipose tissue from Mif-/- mice also exhibited higher Akt and lower PKA phosphorylation following HFD feeding compared with WT, which may contribute to the downregulation of HSL activation during more severe obesity. Both intracellular and extracellular MIF have opposing effects to regulate HSL, but extracellular actions predominate to downregulate HSL and exacerbate the development of obesity during HFD.
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Affiliation(s)
- Liujun Chen
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Lisha Li
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Donghong Cui
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yiheng Huang
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Haibin Tong
- College of Life and Environment Sciences, Wenzhou University, Wenzhou, Zhejiang, China
| | - Haleh Zabihi
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Shuxia Wang
- Department of Cardiology, The General Hospital of Chinese PLA, Beijing, China
| | - Yadan Qi
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Ted Lakowski
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Lin Leng
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Suixin Liu
- Division of Cardiac Rehabilitation, Department of Physical Medicine and Rehabilitation, Xiangya Hospital of Central South University, Changsha, China
| | - Hong Wu
- Institute of Cardiovascular Disease, Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - Lawrence H Young
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Richard Bucala
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Dake Qi
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada; Division of Biomedical Sciences, Faculty of Medicine, Memorial University, St. John's, NL, Canada.
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Jin J, Huangfu B, Xing F, Xu W, He X. Combined exposure to deoxynivalenol facilitates lipid metabolism disorder in high-fat-diet-induced obesity mice. ENVIRONMENT INTERNATIONAL 2023; 182:108345. [PMID: 38008010 DOI: 10.1016/j.envint.2023.108345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 11/15/2023] [Accepted: 11/20/2023] [Indexed: 11/28/2023]
Abstract
Deoxynivalenol (DON) is a trichothecene toxin that mainly produced by strains of Fusarium spp. DON contamination is widely distributed and is a global food safety threat. Existing studies have expounded its harmful effects on growth inhibition, endocrine disruption, immune function impairment, and reproductive toxicity. In energy metabolism, DON suppresses appetite, reduces body weight, triggers lipid oxidation, and negatively affects cholesterol and fatty acid homeostasis. In this study, high-fat diet (HFD) induced obese C57BL/6J mice were orally treated with 0.1 mg/kg bw/d and 1.0 mg/kg bw/d DON for 4 weeks. The lipid metabolism of mice and the molecular mechanisms were explored. The data showed that although DON reduced body weight and fat mass in HFD mice, it significantly increased their serum triglyceride concentrations, disturbance of serum lipid metabolites, impaired glucose, and resulted in insulin intolerance in mice. In addition, the transcriptional and expression changes of lipid metabolism genes in the liver and epididymis (EP) adipose indicate that the DON-mediated increase in serum triglycerides is caused by lipoprotein lipase (LPL) inhibition in EP adipose. Furthermore, DON down-regulates the expression of LPL through the PPARγ signaling pathway in EP adipose. These results are further confirmed by the serum lipidomics analysis. In conclusion, DON acts on the PPARγ pathway of white adipose to inhibit the expression of LPL, mediate the increase of serum triglyceride in obese mice, disturb the homeostasis of lipid metabolism, and increase the risk of cardiovascular disease. This study reveals the interference mechanism of DON on lipid metabolism in obese mice and provides a theoretical basis for its toxic effect in obese individuals.
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Affiliation(s)
- Jing Jin
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs of P.R. China, Beijing 100193, PR China
| | - Bingxin Huangfu
- Key Laboratory of Precision Nutrition and Food Quality, Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, Department of Nutrition and Health, China Agricultural University, Beijing 100083, PR China
| | - Fuguo Xing
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs of P.R. China, Beijing 100193, PR China.
| | - Wentao Xu
- Key Laboratory of Precision Nutrition and Food Quality, Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, Department of Nutrition and Health, China Agricultural University, Beijing 100083, PR China
| | - Xiaoyun He
- Key Laboratory of Precision Nutrition and Food Quality, Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, Department of Nutrition and Health, China Agricultural University, Beijing 100083, PR China.
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4
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Vasella M, Wolf S, Francis EC, Grieb G, Pfister P, Reid G, Bernhagen J, Lindenblatt N, Gousopoulos E, Kim BS. Involvement of the Macrophage Migration Inhibitory Factor (MIF) in Lipedema. Metabolites 2023; 13:1105. [PMID: 37887430 PMCID: PMC10608777 DOI: 10.3390/metabo13101105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 10/19/2023] [Accepted: 10/20/2023] [Indexed: 10/28/2023] Open
Abstract
Lipedema is a chronic disorder that mainly affects women. It is often misdiagnosed, and its etiology remains unknown. Recent research indicates an accumulation of macrophages and a shift in macrophage polarization in lipedema. One known protein superfamily that contributes to macrophage accumulation and polarization is the macrophage migration inhibitory factor (MIF) family. MIF-1 and MIF-2 are ubiquitously expressed and also regulate inflammatory processes in adipose tissue. In this study, the expression of MIF-1, MIF-2 and CD74-a common receptor for both cytokines-was analyzed in tissue samples of 11 lipedema and 11 BMI-matched, age-matched and anatomically matched control patients using qPCR and immunohistochemistry (IHC). The mRNA expression of MIF-1 (mean 1.256; SD 0.303; p = 0.0485) and CD74 (mean 1.514; SD 0.397; p = 0.0097) were significantly elevated in lipedema patients, while MIF-2 expression was unaffected (mean 1.004; SD 0.358; p = 0.9718). The IHC analysis corroborated the results for CD74 expression on a cellular level. In conclusion, our results provide first evidence for a potential involvement of the MIF family, presumably via the MIF-1-CD74 axis, in lipedema.
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Affiliation(s)
- Mauro Vasella
- Department of Plastic Surgery and Hand Surgery, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Stefan Wolf
- Department of Plastic Surgery and Hand Surgery, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Eamon C. Francis
- Department of Plastic and Reconstructive Surgery, Guys and St Thomas Trust, London SE1 7EH, UK
| | - Gerrit Grieb
- Department of Plastic Surgery and Hand Surgery, Gemeinschaftskrankenhaus Havelhoehe, 14089 Berlin, Germany
- Department of Plastic Surgery, Hand Surgery and Burn Center, University Hospital RWTH Aachen, 52074 Aachen, Germany
| | - Pablo Pfister
- Department of Surgery, Stadtspital Zürich Triemli, 8063 Zurich, Switzerland
| | - Gregory Reid
- Department of Plastic Surgery and Hand Surgery, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Jürgen Bernhagen
- Division of Vascular Biology, Institute for Stroke and Dementia Research (ISD), Ludwig-Maximilians-University (LMU), 81377 Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), 81377 Munich, Germany
- Munich Heart Alliance, German Centre for Cardiovascular Diseases, 80802 Munich, Germany
| | - Nicole Lindenblatt
- Department of Plastic Surgery and Hand Surgery, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Epameinondas Gousopoulos
- Department of Plastic Surgery and Hand Surgery, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Bong-Sung Kim
- Department of Plastic Surgery and Hand Surgery, University Hospital Zurich, 8091 Zurich, Switzerland
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5
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Shannon CE, Ní Chathail MB, Mullin SM, Meehan A, McGillicuddy FC, Roche HM. Precision nutrition for targeting pathophysiology of cardiometabolic phenotypes. Rev Endocr Metab Disord 2023; 24:921-936. [PMID: 37402955 PMCID: PMC10492734 DOI: 10.1007/s11154-023-09821-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/22/2023] [Indexed: 07/06/2023]
Abstract
Obesity is a heterogenous disease accompanied by a broad spectrum of cardiometabolic risk profiles. Traditional paradigms for dietary weight management do not address biological heterogeneity between individuals and have catastrophically failed to combat the global pandemic of obesity-related diseases. Nutritional strategies that extend beyond basic weight management to instead target patient-specific pathophysiology are warranted. In this narrative review, we provide an overview of the tissue-level pathophysiological processes that drive patient heterogeneity to shape distinct cardiometabolic phenotypes in obesity. Specifically, we discuss how divergent physiology and postprandial phenotypes can reveal key metabolic defects within adipose, liver, or skeletal muscle, as well as the integrative involvement of the gut microbiome and the innate immune system. Finally, we highlight potential precision nutritional approaches to target these pathways and discuss recent translational evidence concerning the efficacy of such tailored dietary interventions for different obesity phenotypes, to optimise cardiometabolic benefits.
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Affiliation(s)
- Christopher E Shannon
- Nutrigenomics Research Group, UCD Conway Institute, and Institute of Food and Health, School of Public Health, Physiotherapy and Sports Science, University College Dublin, Dublin, Republic of Ireland
- School of Medicine, University College Dublin, Dublin, Republic of Ireland
- Division of Diabetes, Department of Medicine, UT Health San Antonio, San Antonio, TX, USA
| | - Méabh B Ní Chathail
- Nutrigenomics Research Group, UCD Conway Institute, and Institute of Food and Health, School of Public Health, Physiotherapy and Sports Science, University College Dublin, Dublin, Republic of Ireland
| | - Sinéad M Mullin
- Nutrigenomics Research Group, UCD Conway Institute, and Institute of Food and Health, School of Public Health, Physiotherapy and Sports Science, University College Dublin, Dublin, Republic of Ireland
| | - Andrew Meehan
- School of Medicine, University College Dublin, Dublin, Republic of Ireland
| | | | - Helen M Roche
- Nutrigenomics Research Group, UCD Conway Institute, and Institute of Food and Health, School of Public Health, Physiotherapy and Sports Science, University College Dublin, Dublin, Republic of Ireland.
- Institute for Global Food Security, Queen's University Belfast, Belfast, Northern Ireland.
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6
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Carpi S, Quarta S, Doccini S, Saviano A, Marigliano N, Polini B, Massaro M, Carluccio MA, Calabriso N, Wabitsch M, Santorelli FM, Cecchini M, Maione F, Nieri P, Scoditti E. Tanshinone IIA and Cryptotanshinone Counteract Inflammation by Regulating Gene and miRNA Expression in Human SGBS Adipocytes. Biomolecules 2023; 13:1029. [PMID: 37509065 PMCID: PMC10377153 DOI: 10.3390/biom13071029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 06/14/2023] [Accepted: 06/21/2023] [Indexed: 07/30/2023] Open
Abstract
Inflammation of the adipose tissue contributes to the onset and progression of several chronic obesity-related diseases. The two most important lipophilic diterpenoid compounds found in the root of Salvia milthorrhiza Bunge (also called Danshen), tanshinone IIA (TIIA) and cryptotanshinone (CRY), have many favorable pharmacological effects. However, their roles in obesity-associated adipocyte inflammation and related sub-networks have not been fully elucidated. In the present study, we investigated the gene, miRNAs and protein expression profile of prototypical obesity-associated dysfunction markers in inflamed human adipocytes treated with TIIA and CRY. The results showed that TIIA and CRY prevented tumor necrosis factor (TNF)-α induced inflammatory response in adipocytes, by counter-regulating the pattern of secreted cytokines/chemokines associated with adipocyte inflammation (CCL2/MCP-1, CXCL10/IP-10, CCL5/RANTES, CXCL1/GRO-α, IL-6, IL-8, MIF and PAI-1/Serpin E1) via the modulation of gene expression (as demonstrated for CCL2/MCP-1, CXCL10/IP-10, CCL5/RANTES, CXCL1/GRO-α, and IL-8), as well as related miRNA expression (miR-126-3p, miR-223-3p, miR-124-3p, miR-155-5p, and miR-132-3p), and by attenuating monocyte recruitment. This is the first demonstration of a beneficial effect by TIIA and CRY on adipocyte dysfunction associated with obesity development and complications, offering a new outlook for the prevention and/or treatment of metabolic diseases.
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Affiliation(s)
- Sara Carpi
- Science of Health Department, Magna Græcia University, 88100 Catanzaro, Italy
- NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, 56100 Pisa, Italy
- Department of Pharmacy, University of Pisa, 56100 Pisa, Italy
| | - Stefano Quarta
- Department of Biological and Environmental Sciences and Technologies (DISTEBA), University of Salento, 73100 Lecce, Italy
| | - Stefano Doccini
- IRCCS Fondazione Stella Maris, Calambrone, 56128 Pisa, Italy
| | - Anella Saviano
- ImmunoPharmaLab, Department of Pharmacy, School of Medicine and Surgery, University of Naples Federico II, 80131 Naples, Italy
| | - Noemi Marigliano
- ImmunoPharmaLab, Department of Pharmacy, School of Medicine and Surgery, University of Naples Federico II, 80131 Naples, Italy
| | - Beatrice Polini
- Department of Pharmacy, University of Pisa, 56100 Pisa, Italy
- Department of Pathology, University of Pisa, 56100 Pisa, Italy
| | - Marika Massaro
- National Research Council (CNR), Institute of Clinical Physiology (IFC), 73100 Lecce, Italy
| | | | - Nadia Calabriso
- National Research Council (CNR), Institute of Clinical Physiology (IFC), 73100 Lecce, Italy
| | - Martin Wabitsch
- Division of Pediatric Endocrinology, Diabetes and Obesity, Department of Pediatrics and Adolescent Medicine, University of Ulm, 89075 Ulm, Germany
| | | | - Marco Cecchini
- NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, 56100 Pisa, Italy
| | - Francesco Maione
- ImmunoPharmaLab, Department of Pharmacy, School of Medicine and Surgery, University of Naples Federico II, 80131 Naples, Italy
| | - Paola Nieri
- Department of Pharmacy, University of Pisa, 56100 Pisa, Italy
| | - Egeria Scoditti
- National Research Council (CNR), Institute of Clinical Physiology (IFC), 73100 Lecce, Italy
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7
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Huang Y, Cui D, Chen L, Tong H, Wu H, Muller GK, Qi Y, Wang S, Xu J, Gao X, Fifield KE, Wang L, Xia Z, Vanderluit JL, Liu S, Leng L, Sun G, McGuire J, Young LH, Bucala R, Qi D. A pref-1-controlled non-inflammatory mechanism of insulin resistance. iScience 2023; 26:106923. [PMID: 37283810 PMCID: PMC10239698 DOI: 10.1016/j.isci.2023.106923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 04/21/2023] [Accepted: 05/15/2023] [Indexed: 06/08/2023] Open
Abstract
While insulin resistance (IR) is associated with inflammation in white adipose tissue, we report a non-inflammatory adipose mechanism of high fat-induced IR mediated by loss of Pref-1. Pref-1, released from adipose Pref-1+ cells with characteristics of M2 macrophages, endothelial cells or progenitors, inhibits MIF release from both Pref-1+ cells and adipocytes by binding with integrin β1 and inhibiting the mobilization of p115. High palmitic acid induces PAR2 expression in Pref-1+ cells, downregulating Pref-1 expression and release in an AMPK-dependent manner. The loss of Pref-1 increases adipose MIF secretion contributing to non-inflammatory IR in obesity. Treatment with Pref-1 blunts the increase in circulating plasma MIF levels and subsequent IR induced by a high palmitic acid diet. Thus, high levels of fatty acids suppress Pref-1 expression and secretion, through increased activation of PAR2, resulting in an increase in MIF secretion and a non-inflammatory adipose mechanism of IR.
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Affiliation(s)
- Yiheng Huang
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Donghong Cui
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Liujun Chen
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Haibin Tong
- College of Life and Environment Sciences, Wenzhou University, Wenzhou, Zhejiang, China
| | - Hong Wu
- Institute of Cardiovascular Disease, Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - Grace K. Muller
- Department of Cell and Molecular Physiology, Loyola University, Chicago, IL, USA
| | - Yadan Qi
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Shuxia Wang
- Department of Cardiology, The General Hospital of Chinese PLA, Beijing, China
| | - Jinjie Xu
- Beijing Anding Hospital, Capital Medical University, Beijing, China
| | - Xiang Gao
- College of Life Sciences, Qingdao University, Qingdao, Shandong, China
| | - Kathleen E. Fifield
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John’s, NL, Canada
| | - Lingyan Wang
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John’s, NL, Canada
| | | | - Jacqueline L. Vanderluit
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John’s, NL, Canada
| | - Suixin Liu
- Division of Cardiac Rehabilitation, Department of Physical Medicine & Rehabilitation, Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Lin Leng
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Guang Sun
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John’s, NL, Canada
| | - John McGuire
- Department of Medical Biophysics, Schulich School of Medicine & Dentistry, Western University, London, ON, Canada
| | - Lawrence H. Young
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
- Department of Cellular and Molecular Physiology, Yale University School of Medicine, New Haven, CT, USA
| | - Richard Bucala
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Dake Qi
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John’s, NL, Canada
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8
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Macrophages, Low-Grade Inflammation, Insulin Resistance and Hyperinsulinemia: A Mutual Ambiguous Relationship in the Development of Metabolic Diseases. J Clin Med 2022; 11:jcm11154358. [PMID: 35955975 PMCID: PMC9369133 DOI: 10.3390/jcm11154358] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 07/21/2022] [Accepted: 07/22/2022] [Indexed: 02/06/2023] Open
Abstract
Metabolic derangement with poor glycemic control accompanying overweight and obesity is associated with chronic low-grade inflammation and hyperinsulinemia. Macrophages, which present a very heterogeneous population of cells, play a key role in the maintenance of normal tissue homeostasis, but functional alterations in the resident macrophage pool as well as newly recruited monocyte-derived macrophages are important drivers in the development of low-grade inflammation. While metabolic dysfunction, insulin resistance and tissue damage may trigger or advance pro-inflammatory responses in macrophages, the inflammation itself contributes to the development of insulin resistance and the resulting hyperinsulinemia. Macrophages express insulin receptors whose downstream signaling networks share a number of knots with the signaling pathways of pattern recognition and cytokine receptors, which shape macrophage polarity. The shared knots allow insulin to enhance or attenuate both pro-inflammatory and anti-inflammatory macrophage responses. This supposedly physiological function may be impaired by hyperinsulinemia or insulin resistance in macrophages. This review discusses the mutual ambiguous relationship of low-grade inflammation, insulin resistance, hyperinsulinemia and the insulin-dependent modulation of macrophage activity with a focus on adipose tissue and liver.
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9
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Rengachar P, Polavarapu S, Das UN. Insights in diabetes: Molecular mechanisms-Protectin DX, an anti-inflammatory and a stimulator of inflammation resolution metabolite of docosahexaenoic acid, protects against the development of streptozotocin-induced type 1 and type 2 diabetes mellitus in male Swiss albino mice. Front Endocrinol (Lausanne) 2022; 13:1053879. [PMID: 36778598 PMCID: PMC9908003 DOI: 10.3389/fendo.2022.1053879] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 12/28/2022] [Indexed: 01/26/2023] Open
Abstract
Our previous studies revealed that certain endogenous low molecular weight lipids have potent anti-diabetic actions. Of all, arachidonic acid (AA) and its anti-inflammatory and inflammation resolving metabolite lipoxin A4 (LXA4) are the most potent anti-diabetic molecules. Similar anti-diabetic action is also shown by resolvins. In our efforts to identify other similar lipid based anti-diabetic molecules, we investigated potential anti-diabetic action of protectin DX that also has anti-inflammatory and inducer of inflammation resolution action(s) like LXA4. Protectin DX {10(S),17(S)-dihydroxy-4Z,7Z,11E,13Z,15E,19Z-docosahexaenoic acid, also called as 10(S),17(S)-DiHDoHE)} prevented the development of streptozotocin-induced type 1 and type 2 diabetes mellitus in Swiss male albino mice. Protectin DX showed potent anti-inflammatory, antioxidant and anti-apoptotic actions that could explain its anti-diabetic action. In view of these beneficial actions, efforts need to be developed to exploit PDX and other similar compounds as potential anti-diabetic molecule in humans.
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Affiliation(s)
- Poorani Rengachar
- BioScience Research Centre, Gayatri Vidya Parishad Institute of Healthcare and Medical Technology, Visakhapatnam, India
- Department of Microbiology, Gayatri Vidya Parishad Institute of Healthcare and Medical Technology, Visakhapatnam, India
| | - Sailaja Polavarapu
- BioScience Research Centre, Gayatri Vidya Parishad Institute of Healthcare and Medical Technology, Visakhapatnam, India
- Department of Microbiology, Gayatri Vidya Parishad Institute of Healthcare and Medical Technology, Visakhapatnam, India
| | - Undurti N. Das
- BioScience Research Centre, Gayatri Vidya Parishad Institute of Healthcare and Medical Technology, Visakhapatnam, India
- R&D, UND Life Sciences, Battle Ground, WA, United States
- Department of Biotechnology, Indian Institute of Technology-Hyderabad, Sangareddy, Telangana, India
- *Correspondence: Undurti N. Das,
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10
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Tran A, He W, Chen JTC, Wellhauser L, Hopperton KE, Bazinet RP, Belsham DD. Palmitate-mediated induction of neuropeptide Y expression occurs through intracellular metabolites and not direct exposure to proinflammatory cytokines. J Neurochem 2021; 159:574-589. [PMID: 34482548 DOI: 10.1111/jnc.15504] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 08/19/2021] [Accepted: 08/28/2021] [Indexed: 12/11/2022]
Abstract
A contributing factor to the development of obesity is the consumption of a diet high in saturated fatty acids, such as palmitate. These fats induce hypothalamic neuroinflammation, which dysregulates neuronal function and induces orexigenic neuropeptide Y (Npy) to promote food intake. An inflammatory cytokine array identified multiple candidates that could mediate palmitate-induced up-regulation of Npy mRNA levels. Of these, visfatin or nicotinamide phosphoribosyltransferase (NAMPT), macrophage migratory inhibitory factor (MIF), and IL-17F were chosen for further study. Direct treatment of the neuropeptide Y/agouti-related peptide (NPY/AgRP)-expressing mHypoE-46 neuronal cell line with the aforementioned cytokines demonstrated that visfatin could directly induce Npy mRNA expression. Preventing the intracellular metabolism of palmitate through long-chain acyl-CoA synthetase (ACSL) inhibition was sufficient to block the palmitate-mediated increase in Npy gene expression. Furthermore, thin-layer chromatography revealed that in neurons, palmitate is readily incorporated into ceramides and defined species of phospholipids. Exogenous C16 ceramide, dipalmitoyl-phosphatidylcholine, and dipalmitoyl-phosphatidylethanolamine were sufficient to significantly induce Npy expression. This study suggests that the intracellular metabolism of palmitate and elevation of metabolites, including ceramide and phospholipids, are responsible for the palmitate-mediated induction of the potent orexigen Npy. Furthermore, this suggests that the regulation of Npy expression is less reliant on inflammatory cytokines per se than palmitate metabolites in a model of NPY/AgRP neurons. These lipid species likely induce detrimental downstream cellular signaling events ultimately causing an increase in feeding, resulting in an overweight phenotype and/or obesity.
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Affiliation(s)
- Andy Tran
- Department of Physiology, University of Toronto, Ontario, Canada
| | - Wenyuan He
- Department of Physiology, University of Toronto, Ontario, Canada
| | - Jim T C Chen
- Department of Physiology, University of Toronto, Ontario, Canada
| | - Leigh Wellhauser
- Department of Physiology, University of Toronto, Ontario, Canada
| | | | | | - Denise D Belsham
- Department of Physiology, University of Toronto, Ontario, Canada.,Medicine, University of Toronto, Ontario, Canada.,Obstetrics and Gynaecology, University of Toronto, Ontario, Canada
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11
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Al-Muzafar HM, Alshehri FS, Amin KA. The role of pioglitazone in antioxidant, anti-inflammatory, and insulin sensitivity in a high fat-carbohydrate diet-induced rat model of insulin resistance. ACTA ACUST UNITED AC 2021; 54:e10782. [PMID: 34037093 PMCID: PMC8148887 DOI: 10.1590/1414-431x2020e10782] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 03/15/2021] [Indexed: 01/13/2023]
Abstract
We explored the cascade effects of a high fat-carbohydrate diet (HFCD) and pioglitazone (an anti-diabetic therapy used to treat type 2 diabetes mellitus (T2DM)) on lipid profiles, oxidative stress/antioxidant, insulin, and inflammatory biomarkers in a rat model of insulin resistance. Sixty albino rats (80-90 g) were randomly divided into three dietary groups; 1) standard diet; 2) HFCD diet for 12 weeks to induce an in vivo model of insulin resistance; and 3) HFCD diet plus pioglitazone. Blood and tissue samples were taken to assess hepatic function, lipid profiles, oxidative biomarkers, malondialdehyde (MDA) levels, antioxidant defense biomarkers, including reduced glutathione (GSH), superoxide dismutase (SOD), and the inflammatory markers interleukin-6 (IL-6) and tumor necrotic factor (TNF-α). HFCD-fed rats had significantly (P≤0.05) increased serum triacylglycerol (TG), total cholesterol (TC), low-density lipoprotein (LDL), alanine transaminase (ALT), and bilirubin levels, but decreased high-density lipoprotein (HDL) levels compared with the normal group. Moreover, serum leptin, resistin, TNF-α, and IL-6 levels were increased significantly in HFCD animals compared with controls. Similarly, HFCD-induced insulin resistance caused antioxidant and cytokine disturbances, which are important therapy targets for pioglitazone. Importantly, administration of this drug ameliorated these changes, normalized leptin and resistin and inflammatory markers by reducing TNF-α levels. Metabolic cascades of elevated lipid profiles, oxidative stress, insulin, and inflammatory biomarkers are implicated in insulin resistance progression. HFCD induced metabolic cascades comprising hypertriglyceridemia, hyperglycemia, insulin resistance, obesity-associated hormones, and inflammatory biomarkers may be alleviated using pioglitazone.
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Affiliation(s)
- H M Al-Muzafar
- Department of Chemistry, College of Science, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.,Basic & Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - F S Alshehri
- Department of Chemistry, College of Science, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.,Basic & Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - K A Amin
- Department of Chemistry, College of Science, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.,Basic & Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
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12
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Heinrichs D, Brandt EF, Fischer P, Köhncke J, Wirtz TH, Guldiken N, Djudjaj S, Boor P, Kroy D, Weiskirchen R, Bucala R, Wasmuth HE, Strnad P, Trautwein C, Bernhagen J, Berres ML. Unexpected Pro-Fibrotic Effect of MIF in Non-Alcoholic Steatohepatitis Is Linked to a Shift in NKT Cell Populations. Cells 2021; 10:252. [PMID: 33525493 PMCID: PMC7918903 DOI: 10.3390/cells10020252] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/20/2021] [Accepted: 01/22/2021] [Indexed: 12/29/2022] Open
Abstract
Macrophage migration inhibitory factor (MIF) is a pleiotropic inflammatory cytokine with anti-fibrotic properties in toxic liver injury models and anti-steatotic functions in non-alcoholic fatty liver disease (NAFLD) attributed to the CD74/AMPK signaling pathway. As NAFLD progression is associated with fibrosis, we studied MIF function during NAFLD-associated liver fibrogenesis in mice and men by molecular, histological and immunological methods in vitro and in vivo. After NASH diet feeding, hepatic Mif expression was strongly induced, an effect which was absent in Mif∆hep mice. In contrast to hepatotoxic fibrosis models, NASH diet-induced fibrogenesis was significantly abrogated in Mif-/- and Mif∆hep mice associated with a reduced accumulation of the pro-fibrotic type-I NKT cell subpopulation. In vitro, MIF skewed the differentiation of NKT cells towards the type-I subtype. In line with the murine results, expression of fibrosis markers strongly correlated with MIF, its receptors, and markers of NKT type-I cells in NASH patients. We conclude that MIF expression is induced during chronic metabolic injury in mice and men with hepatocytes representing the major source. In NAFLD progression, MIF contributes to liver fibrogenesis skewing NKT cell polarization toward a pro-fibrotic phenotype highlighting the complex, context-dependent role of MIF during chronic liver injury.
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Affiliation(s)
- Daniel Heinrichs
- Department of Internal Medicine III, RWTH Aachen University, 52074 Aachen, Germany; (D.H.); (E.F.B.); (P.F.); (J.K.); (T.H.W.); (N.G.); (D.K.); (H.E.W.); (P.S.); (C.T.)
| | - Elisa F. Brandt
- Department of Internal Medicine III, RWTH Aachen University, 52074 Aachen, Germany; (D.H.); (E.F.B.); (P.F.); (J.K.); (T.H.W.); (N.G.); (D.K.); (H.E.W.); (P.S.); (C.T.)
| | - Petra Fischer
- Department of Internal Medicine III, RWTH Aachen University, 52074 Aachen, Germany; (D.H.); (E.F.B.); (P.F.); (J.K.); (T.H.W.); (N.G.); (D.K.); (H.E.W.); (P.S.); (C.T.)
| | - Janine Köhncke
- Department of Internal Medicine III, RWTH Aachen University, 52074 Aachen, Germany; (D.H.); (E.F.B.); (P.F.); (J.K.); (T.H.W.); (N.G.); (D.K.); (H.E.W.); (P.S.); (C.T.)
| | - Theresa H. Wirtz
- Department of Internal Medicine III, RWTH Aachen University, 52074 Aachen, Germany; (D.H.); (E.F.B.); (P.F.); (J.K.); (T.H.W.); (N.G.); (D.K.); (H.E.W.); (P.S.); (C.T.)
| | - Nurdan Guldiken
- Department of Internal Medicine III, RWTH Aachen University, 52074 Aachen, Germany; (D.H.); (E.F.B.); (P.F.); (J.K.); (T.H.W.); (N.G.); (D.K.); (H.E.W.); (P.S.); (C.T.)
| | - Sonja Djudjaj
- Institute of Pathology, RWTH Aachen University, 52074 Aachen, Germany; (S.D.); (P.B.)
| | - Peter Boor
- Institute of Pathology, RWTH Aachen University, 52074 Aachen, Germany; (S.D.); (P.B.)
| | - Daniela Kroy
- Department of Internal Medicine III, RWTH Aachen University, 52074 Aachen, Germany; (D.H.); (E.F.B.); (P.F.); (J.K.); (T.H.W.); (N.G.); (D.K.); (H.E.W.); (P.S.); (C.T.)
| | - Ralf Weiskirchen
- Institute of Molecular Pathobiochemistry, Experimental Gene Therapy and Clinical Chemistry, RWTH University Hospital Aachen, 52074 Aachen, Germany;
| | - Richard Bucala
- Rheumatology Section of the Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520-8031, USA;
| | - Hermann E. Wasmuth
- Department of Internal Medicine III, RWTH Aachen University, 52074 Aachen, Germany; (D.H.); (E.F.B.); (P.F.); (J.K.); (T.H.W.); (N.G.); (D.K.); (H.E.W.); (P.S.); (C.T.)
| | - Pavel Strnad
- Department of Internal Medicine III, RWTH Aachen University, 52074 Aachen, Germany; (D.H.); (E.F.B.); (P.F.); (J.K.); (T.H.W.); (N.G.); (D.K.); (H.E.W.); (P.S.); (C.T.)
| | - Christian Trautwein
- Department of Internal Medicine III, RWTH Aachen University, 52074 Aachen, Germany; (D.H.); (E.F.B.); (P.F.); (J.K.); (T.H.W.); (N.G.); (D.K.); (H.E.W.); (P.S.); (C.T.)
| | - Jürgen Bernhagen
- Chair of Vascular Biology, Institute of Stroke and Dementia Research, LMU Klinikum, Lud-wig-Maximilian-University (LMU), 81377 Munich, Germany;
- Munich Cluster for Systems Neurology, 81377 Munich, Germany
| | - Marie-Luise Berres
- Department of Internal Medicine III, RWTH Aachen University, 52074 Aachen, Germany; (D.H.); (E.F.B.); (P.F.); (J.K.); (T.H.W.); (N.G.); (D.K.); (H.E.W.); (P.S.); (C.T.)
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13
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Defective immunosuppressive function of Treg cells in visceral adipose tissue in MIF deficient mice. Cytokine 2020; 138:155372. [PMID: 33246771 DOI: 10.1016/j.cyto.2020.155372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 11/10/2020] [Accepted: 11/11/2020] [Indexed: 11/24/2022]
Abstract
Obesity, a global health problem nowadays, is a state of low-grade chronic inflammation of adipose tissue (AT) associated with increased adipocyte growth and proliferation and immune cell polarization towards an inflammatory phenotype within the stromal vascular fraction (SVF). Pro-inflammatory cells in the AT produce mediators of inflammation (IL-1β, TNF, macrophage migration inhibitory factor - MIF), thereby surpassing the anti-inflammatory response mediated by IL-10 and TGF-β, cytokines produced by regulatory T (Treg) cells. In this study we demonstrate that the absence of the pro-inflammatory cytokine MIF led to obesity and inflammation in the visceral AT (VAT) in 6 months old MIF-/- mice. Besides the increment of pro-inflammatory AT macrophages and the enhanced production of TNF and IL-1β, VAT of MIF-/- mice contained increased numbers of Treg cells. In situ proliferation of Treg cells did not differ between MIF-/- and wild type mice, but Treg cells isolated from the VAT of MIF-deficient mice, and not from the cervical lymph nodes, exhibited lower expression and production of IL-10 and TGF-β. Additionally, SVF cells had significantly lower levels of STAT3 and IL-33, altogether indicating that VAT Treg cells in MIF-/- mice, albeit abundantly present, are not fully functional. These results indicate that MIF is a new regulator of VAT Treg cell function, necessary for their immunosuppressive activities.
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14
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Xu J, Dun J, Yang J, Zhang J, Lin Q, Huang M, Ji F, Huang L, You X, Lin Y. Letrozole Rat Model Mimics Human Polycystic Ovarian Syndrome and Changes in Insulin Signal Pathways. Med Sci Monit 2020; 26:e923073. [PMID: 32638705 PMCID: PMC7366789 DOI: 10.12659/msm.923073] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND The aim of this study was to explore whether letrozole and high-fat diets (HFD) can induce obese insulin-resistant polycystic ovary syndrome (PCOS) with all reproductive and metabolic phenotypes in a rat model. MATERIAL AND METHODS Twenty-four 3-week-old female Sprague-Dawley rats were randomized into 4 groups: control, Letrozole, HFD, and Letrozol+HFD. The PCOS model was induced by 12 weeks of Letrozole treatment (1 mg/kg p.o. dissolved in 0.5% CMC solutions once daily) and HFD. Ovarian morphology, estrous cyclicity, hormonal status, body weight, glucose and insulin tolerance, lipid profile, and insulin signaling pathway were investigated. RESULTS The rat model manifests anovulatory cycles and PCO morphology, increased body weight, elevated testosterone levels, abnormal glucose and lipid metabolism, and insulin resistance. The rat model also expresses significantly decreased phosphorylation of 6 essential signaling proteins - INSR, IRS, PI3K, AKT, ERK1, ERK2 - in the PI3K/AKT and MAPK/ERK pathways in the classic insulin-sensitive tissues (e.g., quadriceps femoris muscle, omentum majus, and liver), as well as non-classic target ovary tissues. Disrupted insulin signaling contributes to the decrease in insulin sensitivity and compensatory hyperinsulinemia in PCOS rats. CONCLUSIONS Continuous administration of letrozole and high-fat diets can induce PCOS, metabolic phenotypes, and disrupted activation of the insulin signaling pathway.
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Affiliation(s)
- Jinbang Xu
- Department of Traditional Chinese Medicine, Fujian Provincial Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China (mainland)
| | - Jingjing Dun
- Department of Traditional Chinese Medicine, Fujian Provincial Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China (mainland)
| | - Juan Yang
- Department of Traditional Chinese Medicine, Fujian Provincial Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China (mainland)
| | - Junxin Zhang
- Department of Traditional Chinese Medicine, Fujian Provincial Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China (mainland)
| | - Qiuping Lin
- Department of Traditional Chinese Medicine, Fujian Provincial Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China (mainland)
| | - Mingqing Huang
- College of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, China (mainland)
| | - Feng Ji
- College of Acupuncture, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, China (mainland)
| | - Lishan Huang
- College of Acupuncture, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, China (mainland)
| | - Xiumi You
- Department of Traditional Chinese Medicine, Fujian Provincial Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China (mainland)
| | - Ying Lin
- College of Acupuncture, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, China (mainland)
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15
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Sudhakaran M, Doseff AI. The Targeted Impact of Flavones on Obesity-Induced Inflammation and the Potential Synergistic Role in Cancer and the Gut Microbiota. Molecules 2020; 25:E2477. [PMID: 32471061 PMCID: PMC7321129 DOI: 10.3390/molecules25112477] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 05/21/2020] [Accepted: 05/23/2020] [Indexed: 12/19/2022] Open
Abstract
Obesity is an inflammatory disease that is approaching pandemic levels, affecting nearly 30% of the world's total population. Obesity increases the risk of diabetes, cardiovascular disorders, and cancer, consequentially impacting the quality of life and imposing a serious socioeconomic burden. Hence, reducing obesity and related life-threatening conditions has become a paramount health challenge. The chronic systemic inflammation characteristic of obesity promotes adipose tissue remodeling and metabolic changes. Macrophages, the major culprits in obesity-induced inflammation, contribute to sustaining a dysregulated immune function, which creates a vicious adipocyte-macrophage crosstalk, leading to insulin resistance and metabolic disorders. Therefore, targeting regulatory inflammatory pathways has attracted great attention to overcome obesity and its related conditions. However, the lack of clinical efficacy and the undesirable side-effects of available therapeutic options for obesity provide compelling reasons for the need to identify additional approaches for the prevention and treatment of obesity-induced inflammation. Plant-based active metabolites or nutraceuticals and diets with an increased content of these compounds are emerging as subjects of intense scientific investigation, due to their ability to ameliorate inflammatory conditions and offer safe and cost-effective opportunities to improve health. Flavones are a class of flavonoids with anti-obesogenic, anti-inflammatory and anti-carcinogenic properties. Preclinical studies have laid foundations by establishing the potential role of flavones in suppressing adipogenesis, inducing browning, modulating immune responses in the adipose tissues, and hindering obesity-induced inflammation. Nonetheless, the understanding of the molecular mechanisms responsible for the anti-obesogenic activity of flavones remains scarce and requires further investigations. This review recapitulates the molecular aspects of obesity-induced inflammation and the crosstalk between adipocytes and macrophages, while focusing on the current evidence on the health benefits of flavones against obesity and chronic inflammation, which has been positively correlated with an enhanced cancer incidence. We conclude the review by highlighting the areas of research warranting a deeper investigation, with an emphasis on flavones and their potential impact on the crosstalk between adipocytes, the immune system, the gut microbiome, and their role in the regulation of obesity.
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Affiliation(s)
- Meenakshi Sudhakaran
- Physiology Graduate Program, Michigan State University, East Lansing, MI 48824, USA;
- Department of Physiology, Michigan State University, East Lansing, MI 48824, USA
| | - Andrea I. Doseff
- Department of Physiology, Michigan State University, East Lansing, MI 48824, USA
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI 48824, USA
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16
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Pinheiro-Machado E, Gurgul-Convey E, Marzec MT. Immunometabolism in type 2 diabetes mellitus: tissue-specific interactions. Arch Med Sci 2020; 19:895-911. [PMID: 37560741 PMCID: PMC10408029 DOI: 10.5114/aoms.2020.92674] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 10/23/2019] [Indexed: 08/11/2023] Open
Abstract
The immune system is frequently described in the context of its protective function against infections and its role in the development of autoimmunity. For more than a decade, the interactions between the immune system and metabolic processes have been reported, in effect creating a new research field, termed immunometabolism. Accumulating evidence supports the hypothesis that the development of metabolic diseases may be linked to inflammation, and reflects, in some cases, the activation of immune responses. As such, immunometabolism is defined by 1) inflammation as a driver of disease development and/or 2) metabolic processes stimulating cellular differentiation of the immune components. In this review, the main factors capable of altering the immuno-metabolic communication leading to the development and establishment of obesity and diabetes are comprehensively presented. Tissue-specific immune responses suggested to impair metabolic processes are described, with an emphasis on the adipose tissue, gut, muscle, liver, and pancreas.
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Affiliation(s)
- Erika Pinheiro-Machado
- Department of Pathology and Medical Biology, University Medical Center Groningen, Groningen, Netherlands
| | - Ewa Gurgul-Convey
- Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany
| | - Michal T. Marzec
- Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
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17
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Kim BS, Tilstam PV, Arnke K, Leng L, Ruhl T, Piecychna M, Schulte W, Sauler M, Frueh FS, Storti G, Lindenblatt N, Giovanoli P, Pallua N, Bernhagen J, Bucala R. Differential regulation of macrophage activation by the MIF cytokine superfamily members MIF and MIF-2 in adipose tissue during endotoxemia. FASEB J 2020; 34:4219-4233. [PMID: 31961019 DOI: 10.1096/fj.201901511r] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 12/27/2019] [Accepted: 01/07/2020] [Indexed: 01/01/2023]
Abstract
Sepsis is a leading cause of death worldwide and recent studies have shown white adipose tissue (WAT) to be an important regulator in septic conditions. In the present study, the role of the inflammatory cytokine macrophage migration inhibitory factor (MIF) and its structural homolog D-dopachrome tautomerase (D-DT/MIF-2) were investigated in WAT in a murine endotoxemia model. Both MIF and MIF-2 levels were increased in the peritoneal fluid of LPS-challenged wild-type mice, yet, in visceral WAT, the proteins were differentially regulated, with elevated MIF but downregulated MIF-2 expression in adipocytes. Mif gene deletion polarized adipose tissue macrophages (ATM) toward an anti-inflammatory phenotype while Mif-2 gene knockout drove ATMs toward a pro-inflammatory phenotype and Mif-deficiency was found to increase fibroblast viability. Additionally, we observed the same differential regulation of these two MIF family proteins in human adipose tissue in septic vs healthy patients. Taken together, these data suggest an inverse relationship between adipocyte MIF and MIF-2 expression during systemic inflammation, with the downregulation of MIF-2 in fat tissue potentially increasing pro-inflammatory macrophage polarization to further drive adipose inflammation.
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Affiliation(s)
- Bong-Sung Kim
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT.,Department of Plastic, Reconstructive and Hand Surgery, RWTH Aachen University, Aachen, Germany.,Department of Plastic Surgery and Hand Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Pathricia V Tilstam
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT
| | - Kevin Arnke
- Department of Plastic Surgery and Hand Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Lin Leng
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT
| | - Tim Ruhl
- Department of Plastic, Reconstructive and Hand Surgery, RWTH Aachen University, Aachen, Germany
| | - Marta Piecychna
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT
| | - Wibke Schulte
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT.,Department of Surgery, Yale University School of Medicine, New Haven, CT.,Department of Surgery, Campus Charité Mitte
- Campus Virchow-Klinikum, Charité - Universitätsmedizin Berlin, Berlin, Germany.,Berlin Institute of Health (BIH), Berlin, Germany
| | - Maor Sauler
- Department of Pulmonary, Critical Care, and Sleep Medicine, Yale University School of Medicine, New Haven, CT
| | - Florian S Frueh
- Department of Plastic Surgery and Hand Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Gabriele Storti
- Unit of Plastic and Reconstructive Surgery, University of Rome- "Tor Vergata", Rome, Italy
| | - Nicole Lindenblatt
- Department of Plastic Surgery and Hand Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Pietro Giovanoli
- Department of Plastic Surgery and Hand Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Norbert Pallua
- Department of Plastic, Reconstructive and Hand Surgery, RWTH Aachen University, Aachen, Germany
| | - Jürgen Bernhagen
- Department of Vascular Biology, Institute for Stroke and Dementia Research, Ludwig-Maximilians-University Munich, Munich, Germany.,Munich Cluster for Systems Neurology, Munich, Germany
| | - Richard Bucala
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT
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18
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Stošić-Grujičić S, Saksida T, Miljković Đ, Stojanović I. MIF and insulin: Lifetime companions from common genesis to common pathogenesis. Cytokine 2019; 125:154792. [PMID: 31400637 DOI: 10.1016/j.cyto.2019.154792] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 07/01/2019] [Accepted: 07/24/2019] [Indexed: 12/19/2022]
Abstract
Pro-inflammatory nature of macrophage migration inhibitory factor (MIF) has been generally related to the propagation of inflammatory and autoimmune diseases. But this molecule possesses many other peculiar functions, unrelated to the immune system, among which is its supportive role in the post-translational modifications of insulin. In this way MIF enables proper insulin conformation within the pancreatic beta cell and its full activity. The inherent or acquired changes in MIF expression might therefore lead to different insulin processing and initiation of autoimmunity. The relation between MIF and insulin does not stop at this point; these two molecules continue to interact during pathological states characterized by inflammation and insulin resistance. In this context, MIF indirectly and negatively influences insulin action by boosting inflammatory environment and disabling target cells to respond to insulin. On the other side, insulin might interfere with MIF action as well, acting as an anti-inflammatory mediator. Therefore, the proper interaction between MIF and insulin is crucial for maintaining homeostasis, while anti-inflammatory therapies based on the systemic MIF blockage may disturb this balance. This review covers MIF-insulin relationship in the physiological and pathological conditions and discusses the approaches for MIF inhibition and their net effect specifically considering possible impact on insulin misfolding and the possible misinterpretation of previous results due to the discovery of MIF functional homolog D-dopachrome tautomerase.
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Affiliation(s)
- Stanislava Stošić-Grujičić
- Department of Immunology, Institute for Biological Research "Siniša Stanković", University of Belgrade, Belgrade, Serbia
| | - Tamara Saksida
- Department of Immunology, Institute for Biological Research "Siniša Stanković", University of Belgrade, Belgrade, Serbia
| | - Đorđe Miljković
- Department of Immunology, Institute for Biological Research "Siniša Stanković", University of Belgrade, Belgrade, Serbia
| | - Ivana Stojanović
- Department of Immunology, Institute for Biological Research "Siniša Stanković", University of Belgrade, Belgrade, Serbia.
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19
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Identification of lncRNAs and Genes Responsible for Fatness and Fatty Acid Composition Traits between the Tibetan and Yorkshire Pigs. Int J Genomics 2019; 2019:5070975. [PMID: 31281828 PMCID: PMC6589220 DOI: 10.1155/2019/5070975] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 02/10/2019] [Accepted: 03/03/2019] [Indexed: 12/15/2022] Open
Abstract
Tibetan pigs from the Tibetan Plateau are characterized with a significant phenotypic difference relative to lowland pigs. In this study, a significant difference of the fatness and fatty acid composition traits was observed between the Tibetan and Yorkshire pigs. To uncover the involved mechanism, the expression profile of long noncoding RNAs (lncRNAs) and genes was compared between them. After serial filtered steps, 1,964 lncRNAs were obtained through our computational pipeline. In total, 63 and 715 lncRNAs and genes were identified to be differentially expressed. Evidence from cis- and trans-targeting analysis of lncRNAs demonstrated that some lncRNAs, such as MSTRG.14097 and MSTRG.8034, played important roles in the fatness and fatty acid composition traits. Bioinformatics analysis revealed that many candidate genes were responsible for the two traits. Of these, FASN, ACACA, SCD, ME3, PDHB, ACSS1, ACSS2, and ACLY were identified, which functioned in regulating the level of hexadecanoic acid, hexadecenoic acid, octadecenoic acid, and monounsaturated fatty acid. And LPGAT1, PDK4, ACAA1, and ADIPOQ were associated with the content of stearic acid, octadecadienoic acid, and polyunsaturated fatty acid. Candidate genes, which were responsible for fatness trait, consisted of FGF2, PLAG1, ADIPOQ, IRX3, MIF, IL-34, ADAM8, HMOX1, Vav1, and TLR8. In addition, association analysis also revealed that 34 and 57 genes significantly correlated to the fatness and fatty acid composition trait, respectively. Working out the mechanism caused by these lncRNAs and candidate genes is proven to be complicated but is invaluable to our understanding of fatness and fatty acid composition traits.
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Cui D, Peng Y, Zhang C, Li Z, Su Y, Qi Y, Xing M, Li J, Kim GE, Su KN, Xu J, Wang M, Ding W, Piecychna M, Leng L, Hirasawa M, Jiang K, Young L, Xu Y, Qi D, Bucala R. Macrophage migration inhibitory factor mediates metabolic dysfunction induced by atypical antipsychotic therapy. J Clin Invest 2018; 128:4997-5007. [PMID: 30295645 DOI: 10.1172/jci93090] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 08/28/2018] [Indexed: 12/14/2022] Open
Abstract
Atypical antipsychotics are highly effective antischizophrenic medications but their clinical utility is limited by adverse metabolic sequelae. We investigated whether upregulation of macrophage migration inhibitory factor (MIF) underlies the insulin resistance that develops during treatment with the most commonly prescribed atypical antipsychotic, olanzapine. Olanzapine monotherapy increased BMI and circulating insulin, triglyceride, and MIF concentrations in drug-naive schizophrenic patients with normal MIF expression, but not in genotypic low MIF expressers. Olanzapine administration to mice increased their food intake and hypothalamic MIF expression, which led to activation of the appetite-related AMP-activated protein kinase and Agouti-related protein pathway. Olanzapine also upregulated MIF expression in adipose tissue, which reduced lipolysis and increased lipogenic pathways. Increased plasma lipid concentrations were associated with abnormal fat deposition in liver and skeletal muscle, which are important determinants of insulin resistance. Global MIF-gene deletion protected mice from olanzapine-induced insulin resistance, as did intracerebroventricular injection of neutralizing anti-MIF antibody, supporting the role of increased hypothalamic MIF expression in metabolic dysfunction. These findings uphold the potential pharmacogenomic value of MIF genotype determination and suggest that MIF may be a tractable target for reducing the metabolic side effects of atypical antipsychotic therapy.
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Affiliation(s)
- Donghong Cui
- Shanghai Mental Health Center, Shanghai Jiao Tong University, School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Psychotic Disorders, Shanghai, China.,Brain Science and Technology Research Center, Shanghai Jiao Tong University, China
| | - Yanmin Peng
- Shanghai Mental Health Center, Shanghai Jiao Tong University, School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Psychotic Disorders, Shanghai, China
| | - Chengfang Zhang
- Shanghai Mental Health Center, Shanghai Jiao Tong University, School of Medicine, Shanghai, China.,Shanghai Pudong New Area Mental Health Center, Tongji University School of Medicine, Shanghai, China
| | - Zezhi Li
- Shanghai Mental Health Center, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Yousong Su
- Shanghai Mental Health Center, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Yadan Qi
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Mengjuan Xing
- Shanghai Mental Health Center, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Jia Li
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Grace E Kim
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Kevin N Su
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Jinjie Xu
- Shanghai Mental Health Center, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Meiti Wang
- Shanghai Mental Health Center, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Wenhua Ding
- Shanghai Mental Health Center, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Marta Piecychna
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Lin Leng
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Michiru Hirasawa
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, Newfoundland, Canada
| | - Kaida Jiang
- Shanghai Mental Health Center, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Lawrence Young
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Yifeng Xu
- Shanghai Mental Health Center, Shanghai Jiao Tong University, School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Psychotic Disorders, Shanghai, China
| | - Dake Qi
- Shanghai Mental Health Center, Shanghai Jiao Tong University, School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Psychotic Disorders, Shanghai, China.,Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, Newfoundland, Canada
| | - Richard Bucala
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
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21
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Chan PC, Wu TN, Chen YC, Lu CH, Wabitsch M, Tian YF, Hsieh PS. Targeted inhibition of CD74 attenuates adipose COX-2-MIF-mediated M1 macrophage polarization and retards obesity-related adipose tissue inflammation and insulin resistance. Clin Sci (Lond) 2018; 132:1581-1596. [DOI: 10.1042/cs20180041] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Abstract
Adipose tissue (AT) inflammation is crucial to the development of obesity-associated insulin resistance. Our aim was to investigate the contribution of cyclooxygenase-2 (COX-2)/macrophage migration inhibitory factor (MIF)-mediated cross-talk between hypertrophic adipocytes and macrophages to the etiology of AT inflammation and the involvement of CD74 using human SGBS adipocytes, THP-1 macrophages and mice fed a high-fat (HF) diet. The MIF and CD74 mRNA levels in the adipocytes and stromal vascular cells (SVCs) of white fat were highly correlated with body weight (BW), homeostatic model assessment for insulin resistance (HOMA-IR), and adipose macrophage marker expression levels, especially those in SVCs. COX-2 inhibition suppressed the elevation of MIF production in HF white adipocytes as well as palmitate and hypoxic-treated SGBS adipocytes. Treatment of adipocytes transfected with shCOX-2 and siMIF or subjected to MIF depletion in the medium reversed the pro-inflammatory responses in co-incubated THP-1 cells. Inhibition of NF-κB activation reversed the COX2-dependent MIF secretion from treated adipocytes. The targeted inhibition of macrophage CD74 prevented M1 macrophage polarization in the above co-culture model. The COX-2-dependent increases in CD74 gene expression and MIF release in M1-polarized macrophages facilitated the expression of COX-2 and MIF in co-cultured SGBS adipocytes. CD74 shRNA intravenous injection suppressed HF-induced AT M1 macrophage polarization and inflammation as well as insulin resistance in mice. The present study suggested that COX-2-mediated MIF secretion through NF-κB activation from hypertrophic and hypoxic adipocytes as well as M1 macrophages might substantially contribute to the phenotypic switch of AT macrophages through CD74 in obesity. Inhibition of CD74 could attenuate AT inflammation and insulin resistance in the development of HF diet-induced obesity.
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Affiliation(s)
- Pei-Chi Chan
- Department of Physiology and Biophysics, National Defense Medical Center (NDMC), Taipei, Taiwan
| | - Ting-Ni Wu
- Department of Physiology and Biophysics, National Defense Medical Center (NDMC), Taipei, Taiwan
| | - Ying-Chuan Chen
- Department of Physiology and Biophysics, National Defense Medical Center (NDMC), Taipei, Taiwan
- Headquater, Institute of Preventive Medicine, NDMC, Taipei, Taiwan
| | - Chieh-Hua Lu
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Tri-Service General Hospital, NDMC, Taipei, Taiwan
| | - Martin Wabitsch
- Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics and Adolescent Medicine, Ulm University, Ulm, Germany
| | - Yu-Feng Tian
- Division of General Surgery, Department of Surgery, Yung Kung Campus, Chi-Mei Medical Center, Tainan, Taiwan
- Department of Health & Nutrition, Chia Nan University of Pharmacy and Science, Tainan, Taiwan
| | - Po-Shiuan Hsieh
- Department of Physiology and Biophysics, National Defense Medical Center (NDMC), Taipei, Taiwan
- Headquater, Institute of Preventive Medicine, NDMC, Taipei, Taiwan
- Department of Medical Research, Tri-Service General Hospital, NDMC, Taipei, Taiwan
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22
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Appari M, Channon KM, McNeill E. Metabolic Regulation of Adipose Tissue Macrophage Function in Obesity and Diabetes. Antioxid Redox Signal 2018; 29:297-312. [PMID: 28661198 PMCID: PMC6012981 DOI: 10.1089/ars.2017.7060] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
SIGNIFICANCE Obesity and diabetes are associated with chronic activation of inflammatory pathways that are important mechanistic links between insulin resistance (IR), type 2 diabetes (T2D), and cardiovascular disease pathogenesis. The development of these metabolic diseases is associated with changes in both the number and phenotype of adipose tissue macrophages (ATMs). Emerging lines of evidence have shown that ATMs release proinflammatory cytokines similar to classically activated M1 macrophages, which directly contribute to IR or T2D. In contrast, adipose tissue (AT) from lean healthy individuals contains macrophages with a less inflammatory M2 phenotype. Recent Advances: Recent research has shown that macrophage phenotype is linked to profound changes in macrophage cellular metabolism. CRITICAL ISSUES This review focuses on the role of macrophages in AT inflammation and obesity, and the metabolic changes in macrophage function that occur with activation that underpin their role in the pathogenesis of IR and T2D. We highlight current targets for altering macrophage metabolism from both within the field of metabolic disease and AT biology and more widely within inflammatory biology. FUTURE DIRECTIONS As our knowledge of macrophage metabolic programming in AT builds, there will be increasing scope for targeting this aspect of macrophage biology as a therapeutic strategy in metabolic diseases. Antioxid. Redox Signal. 29, 297-312.
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Affiliation(s)
- Mahesh Appari
- 1 Division of Cardiovascular Medicine, British Heart Foundation Centre for Research Excellence, John Radcliffe Hospital, University of Oxford , Oxford, United Kingdom .,2 Wellcome Trust Centre for Human Genetics, University of Oxford , Oxford, United Kingdom
| | - Keith M Channon
- 1 Division of Cardiovascular Medicine, British Heart Foundation Centre for Research Excellence, John Radcliffe Hospital, University of Oxford , Oxford, United Kingdom .,2 Wellcome Trust Centre for Human Genetics, University of Oxford , Oxford, United Kingdom
| | - Eileen McNeill
- 1 Division of Cardiovascular Medicine, British Heart Foundation Centre for Research Excellence, John Radcliffe Hospital, University of Oxford , Oxford, United Kingdom .,2 Wellcome Trust Centre for Human Genetics, University of Oxford , Oxford, United Kingdom
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23
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Noh SU, Lee WY, Kim WS, Lee YT, Yoon KJ. Expression of macrophage migration inhibitory factor in footpad skin lesions with diabetic neuropathy. Mol Pain 2018; 14:1744806918775482. [PMID: 29690804 PMCID: PMC5968664 DOI: 10.1177/1744806918775482] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Background Diabetic neuropathy originating in distal lower extremities is associated
with pain early in the disease course, overwhelming in the feet. However,
the pathogenesis of diabetic neuropathy remains unclear. Macrophage
migration inhibitory factor has been implicated in the onset of neuropathic
pain and the development of diabetes. Objective of this study was to observe
pain syndromes elicited in the footpad of diabetic neuropathy rat model and
to assess the contributory role of migration inhibitory factor in the
pathogenesis of diabetic neuropathy. Methods Diabetic neuropathy was made in Sprague Dawley rats by streptozotocin. Pain
threshold was evaluated using von Frey monofilaments for 24 weeks. On
comparable experiment time after streptozotocin injection, all footpads were
prepared for following procedures; glutathione assay, terminal
deoxynucleotidyl transferase-mediated biotinylated UTP nick end labeling
staining, immunohistochemistry staining, real-time reverse transcription
polymerase chain reaction, and Western blot. Additionally, human HaCaT skin
keratinocytes were treated with methylglyoxal, transfected with migration
inhibitory factor/control small interfering RNA, and prepared for real-time
reverse transcription polymerase chain reaction and Western blot. Results As compared to sham group, pain threshold was significantly reduced in
diabetic neuropathy group, and glutathione was decreased in footpad skin,
simultaneously, cell death was increased. Over-expression of migration
inhibitory factor, accompanied by low expression of glyoxalase-I and
intraepidermal nerve fibers, was shown on the footpad skin lesions of
diabetic neuropathy. But, there was no significance in expression of
neurotransmitters and inflammatory mediators such as transient receptor
potential vanilloid 1, mas-related G protein coupled receptor D, nuclear
factor kappa B, tumor necrosis factor-alpha, and interleukin-6 between
diabetic neuropathy group and sham group. Intriguingly, small interfering
RNA-transfected knockdown of the migration inhibitory factor gene in
methylglyoxal-treated skin keratinocytes increased expression of
glyoxalase-I and intraepidermal nerve fibers in comparison with control
small interfering RNA-transfected cells, which was decreased by induction of
methylglyoxal. Conclusions Our findings suggest that migration inhibitory factor can aggravate diabetic
neuropathy by suppressing glyoxalase-I and intraepidermal nerve fibers on
the footpad skin lesions and provoke pain. Taken together, migration
inhibitory factor might offer a pharmacological approach to alleviate pain
syndromes in diabetic neuropathy.
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Affiliation(s)
- Sun Up Noh
- 1 Medical Research Institute, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Republic of Korea
| | - Won-Young Lee
- 1 Medical Research Institute, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Republic of Korea.,2 Division of Endocrinology and Metabolism, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Republic of Korea
| | - Won-Serk Kim
- 1 Medical Research Institute, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Republic of Korea.,3 Department of Dermatology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Republic of Korea
| | - Yong-Taek Lee
- 1 Medical Research Institute, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Republic of Korea.,4 Department of Physical and Rehabilitation Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Republic of Korea
| | - Kyung Jae Yoon
- 1 Medical Research Institute, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Republic of Korea.,4 Department of Physical and Rehabilitation Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Republic of Korea
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24
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Hill JH, Solt C, Foster MT. Obesity associated disease risk: the role of inherent differences and location of adipose depots. Horm Mol Biol Clin Investig 2018; 33:/j/hmbci.ahead-of-print/hmbci-2018-0012/hmbci-2018-0012.xml. [PMID: 29547393 DOI: 10.1515/hmbci-2018-0012] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 02/09/2018] [Indexed: 02/07/2023]
Abstract
Obesity and associated metabolic co-morbidities are a worldwide public health problem. Negative health outcomes associated with obesity, however, do not arise from excessive adiposity alone. Rather, deleterious outcomes of adipose tissue accumulation are a result of how adipocytes are distributed to individual regions in the body. Due to our increased understanding of the dynamic relationship that exists between specific adipose depots and disease risk, an accurate characterization of total body adiposity as well as location is required to properly evaluate a population's disease risk. Specifically, distinctive tissue depots within the body include the lower body, upper body and abdominal (deep and superficial) subcutaneous regions, as well as visceral (mesenteric and omental) regions. Upper body and visceral adipose tissues are highly associated with metabolic dysfunction and chronic disease development, whereas lower body gluteofemoral subcutaneous adipose tissue imparts protection against diet-induced metabolic derangement. Each adipose depot functions distinctly as an endocrine organ hence it has a different level of impact on health outcomes. Effluent from adipose tissue can modulate the functions of other tissues, whilst receiving differential communication from the rest of the body via central nervous system innervation, metabolites and other signaling molecules. More so, adipose depots contain a diverse reservoir of tissue-resident immune cells that play an integral part in both maintaining tissue homeostasis, as well as propagating metabolically-induced inflammation. Overall, the conceptualization of obesity and associated risks needs updating to reflect the complexities of obesity. We review adipose tissue characteristics that are linked to deleterious or beneficial adipose tissue distributions.
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Affiliation(s)
- Jessica H Hill
- Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, CO, USA
| | - Claudia Solt
- Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, CO, USA
| | - Michelle T Foster
- Department of Food Science and Human Nutrition, Colorado State University, 1571 Campus Delivery, 500 West Lake Street, Fort Collins, CO 80523, USA, Phone: +(970) 491-6189, Fax: +(970) 491-3875
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25
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Nikołajuk A, Matulewicz N, Stefanowicz M, Karczewska-Kupczewska M. Serum Matrix Metalloproteinase 9 and Macrophage Migration Inhibitory Factor (MIF) Are Increased in Young Healthy Nonobese Subjects with Positive Family History of Type 2 Diabetes. Int J Endocrinol 2018; 2018:3470412. [PMID: 30302090 PMCID: PMC6158960 DOI: 10.1155/2018/3470412] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 08/08/2018] [Indexed: 12/13/2022] Open
Abstract
Insulin resistance increases the risk for cardiovascular disease (CVD) even in the absence of classic risk factors, such as hyperglycemia, hypertension, dyslipidemia, and obesity. Low-grade chronic inflammatory state is associated both with insulin resistance and atherosclerosis. An increased circulating level of proinflammatory proatherogenic factors and biomarkers of endothelial activation was observed in diabetes and CVD. The aim of our study was to assess serum proatherogenic and proinflammatory factors in young healthy nonobese subjects with positive family history of type 2 diabetes. We studied 74 young healthy nonobese subjects with normal glucose tolerance (age < 35 years, BMI < 30 kg/m2), 29 with positive family history of type 2 diabetes (relatives, 25 males and 4 females) and 45 subjects without family history of diabetes (control group, 39 males and 6 females). Hyperinsulinemic-euglycemic clamp was performed, and serum concentrations of monocyte chemoattractant protein-1 (MCP-1), interleukin 18 (IL-18), macrophage inhibitory cytokine 1 (MIC-1), macrophage migration inhibitory factor (MIF), matrix metalloproteinase (MMP-9), and soluble forms of adhesion molecules were measured. Relatives had markedly lower insulin sensitivity (p = 0.019) and higher serum MMP-9 (p < 0.001) and MIF (p = 0.006), but not other chemokines and biomarkers of endothelial function. Insulin sensitivity correlated negatively with serum MMP-9 (r = -0.23, p = 0.045). Our data show that young healthy subjects with positive family history of type 2 diabetes already demonstrate an increase in some nonclassical cardiovascular risk factors.
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Affiliation(s)
- Agnieszka Nikołajuk
- Department of Prophylaxis of Metabolic Diseases, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland
| | - Natalia Matulewicz
- Department of Metabolic Diseases, Medical University of Białystok, Białystok, Poland
| | - Magdalena Stefanowicz
- Department of Metabolic Diseases, Medical University of Białystok, Białystok, Poland
| | - Monika Karczewska-Kupczewska
- Department of Prophylaxis of Metabolic Diseases, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland
- Department of Internal Medicine and Metabolic Disorders, Medical University of Białystok, Białystok, Poland
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26
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Maugham ML, Thomas PB, Crisp GJ, Philp LK, Shah ET, Herington AC, Chen C, Gregory LS, Nelson CC, Seim I, Jeffery PL, Chopin LK. Insights from engraftable immunodeficient mouse models of hyperinsulinaemia. Sci Rep 2017; 7:491. [PMID: 28352127 PMCID: PMC5428450 DOI: 10.1038/s41598-017-00443-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 02/27/2017] [Indexed: 12/11/2022] Open
Abstract
Hyperinsulinaemia, obesity and dyslipidaemia are independent and collective risk factors for many cancers. Here, the long-term effects of a 23% Western high-fat diet (HFD) in two immunodeficient mouse strains (NOD/SCID and Rag1 -/-) suitable for engraftment with human-derived tissue xenografts, and the effect of diet-induced hyperinsulinaemia on human prostate cancer cell line xenograft growth, were investigated. Rag1 -/-and NOD/SCID HFD-fed mice demonstrated diet-induced impairments in glucose tolerance at 16 and 23 weeks post weaning. Rag1 -/- mice developed significantly higher fasting insulin levels (2.16 ± 1.01 ng/ml, P = 0.01) and increased insulin resistance (6.70 ± 1.68 HOMA-IR, P = 0.01) compared to low-fat chow-fed mice (0.71 ± 0.12 ng/ml and 2.91 ± 0.42 HOMA-IR). This was not observed in the NOD/SCID strain. Hepatic steatosis was more extensive in Rag1 -/- HFD-fed mice compared to NOD/SCID mice. Intramyocellular lipid storage was increased in Rag1 -/- HFD-fed mice, but not in NOD/SCID mice. In Rag1 -/- HFD-fed mice, LNCaP xenograft tumours grew more rapidly compared to low-fat chow-fed mice. This is the first characterisation of the metabolic effects of long-term Western HFD in two mouse strains suitable for xenograft studies. We conclude that Rag1 -/- mice are an appropriate and novel xenograft model for studying the relationship between cancer and hyperinsulinaemia.
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Affiliation(s)
- Michelle L Maugham
- Ghrelin Research Group, Translational Research Institute, Institute of Health and Biomedical Innovation, and School of Biomedical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia
- Australian Prostate Cancer Research Centre - Queensland, Institute of Health and Biomedical Innovation, Queensland University of Technology, Princess Alexandra Hospital, Translational Research Institute, Brisbane, Queensland, Australia
- Comparative and Endocrine Biology Laboratory, Translational Research Institute, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
- Skeletal Biology and Forensic Anthropology Research Laboratory, Cancer Program, School of Biomedical Sciences, Translational Research Institute (TRI), Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Patrick B Thomas
- Ghrelin Research Group, Translational Research Institute, Institute of Health and Biomedical Innovation, and School of Biomedical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia
- Australian Prostate Cancer Research Centre - Queensland, Institute of Health and Biomedical Innovation, Queensland University of Technology, Princess Alexandra Hospital, Translational Research Institute, Brisbane, Queensland, Australia
- Comparative and Endocrine Biology Laboratory, Translational Research Institute, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Gabrielle J Crisp
- Ghrelin Research Group, Translational Research Institute, Institute of Health and Biomedical Innovation, and School of Biomedical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia
- Australian Prostate Cancer Research Centre - Queensland, Institute of Health and Biomedical Innovation, Queensland University of Technology, Princess Alexandra Hospital, Translational Research Institute, Brisbane, Queensland, Australia
- Comparative and Endocrine Biology Laboratory, Translational Research Institute, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Lisa K Philp
- Ghrelin Research Group, Translational Research Institute, Institute of Health and Biomedical Innovation, and School of Biomedical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia
- Australian Prostate Cancer Research Centre - Queensland, Institute of Health and Biomedical Innovation, Queensland University of Technology, Princess Alexandra Hospital, Translational Research Institute, Brisbane, Queensland, Australia
| | - Esha T Shah
- Ghrelin Research Group, Translational Research Institute, Institute of Health and Biomedical Innovation, and School of Biomedical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia
- Australian Prostate Cancer Research Centre - Queensland, Institute of Health and Biomedical Innovation, Queensland University of Technology, Princess Alexandra Hospital, Translational Research Institute, Brisbane, Queensland, Australia
- Comparative and Endocrine Biology Laboratory, Translational Research Institute, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Adrian C Herington
- Ghrelin Research Group, Translational Research Institute, Institute of Health and Biomedical Innovation, and School of Biomedical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia
- Australian Prostate Cancer Research Centre - Queensland, Institute of Health and Biomedical Innovation, Queensland University of Technology, Princess Alexandra Hospital, Translational Research Institute, Brisbane, Queensland, Australia
| | - Chen Chen
- School of Biomedical Sciences, University of Queensland, St Lucia, Brisbane, Queensland, Australia
| | - Laura S Gregory
- Skeletal Biology and Forensic Anthropology Research Laboratory, Cancer Program, School of Biomedical Sciences, Translational Research Institute (TRI), Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Colleen C Nelson
- Australian Prostate Cancer Research Centre - Queensland, Institute of Health and Biomedical Innovation, Queensland University of Technology, Princess Alexandra Hospital, Translational Research Institute, Brisbane, Queensland, Australia
| | - Inge Seim
- Ghrelin Research Group, Translational Research Institute, Institute of Health and Biomedical Innovation, and School of Biomedical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia
- Australian Prostate Cancer Research Centre - Queensland, Institute of Health and Biomedical Innovation, Queensland University of Technology, Princess Alexandra Hospital, Translational Research Institute, Brisbane, Queensland, Australia
- Comparative and Endocrine Biology Laboratory, Translational Research Institute, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Penny L Jeffery
- Ghrelin Research Group, Translational Research Institute, Institute of Health and Biomedical Innovation, and School of Biomedical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia.
- Australian Prostate Cancer Research Centre - Queensland, Institute of Health and Biomedical Innovation, Queensland University of Technology, Princess Alexandra Hospital, Translational Research Institute, Brisbane, Queensland, Australia.
- Comparative and Endocrine Biology Laboratory, Translational Research Institute, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia.
| | - Lisa K Chopin
- Ghrelin Research Group, Translational Research Institute, Institute of Health and Biomedical Innovation, and School of Biomedical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia.
- Australian Prostate Cancer Research Centre - Queensland, Institute of Health and Biomedical Innovation, Queensland University of Technology, Princess Alexandra Hospital, Translational Research Institute, Brisbane, Queensland, Australia.
- Comparative and Endocrine Biology Laboratory, Translational Research Institute, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia.
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27
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McLaughlin T, Ackerman SE, Shen L, Engleman E. Role of innate and adaptive immunity in obesity-associated metabolic disease. J Clin Invest 2017; 127:5-13. [PMID: 28045397 DOI: 10.1172/jci88876] [Citation(s) in RCA: 280] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Chronic inflammation in adipose tissue, possibly related to adipose cell hypertrophy, hypoxia, and/or intestinal leakage of bacteria and their metabolic products, likely plays a critical role in the development of obesity-associated insulin resistance (IR). Cells of both the innate and adaptive immune system residing in adipose tissues, as well as in the intestine, participate in this process. Thus, M1 macrophages, IFN-γ-secreting Th1 cells, CD8+ T cells, and B cells promote IR, in part through secretion of proinflammatory cytokines. Conversely, eosinophils, Th2 T cells, type 2 innate lymphoid cells, and possibly Foxp3+ Tregs protect against IR through local control of inflammation.
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28
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The Pathogenesis of Obesity-Associated Adipose Tissue Inflammation. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 960:221-245. [DOI: 10.1007/978-3-319-48382-5_9] [Citation(s) in RCA: 144] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Pritchard MT, McCracken JM. Identifying Novel Targets for Treatment of Liver Fibrosis: What Can We Learn from Injured Tissues which Heal Without a Scar? Curr Drug Targets 2016; 16:1332-46. [PMID: 26302807 DOI: 10.2174/1389450116666150825111439] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Accepted: 08/08/2015] [Indexed: 02/07/2023]
Abstract
The liver is unique in that it is able to regenerate. This regeneration occurs without formation of a scar in the case of non-iterative hepatic injury. However, when the liver is exposed to chronic liver injury, the purely regenerative process fails and excessive extracellular matrix proteins are deposited in place of normal liver parenchyma. While much has been discovered in the past three decades, insights into fibrotic mechanisms have not yet lead to effective therapies; liver transplant remains the only cure for advanced liver disease. In an effort to broaden the collection of possible therapeutic targets, this review will compare and contrast the liver wound healing response to that found in two types of wound healing: scarless wound healing of fetal skin and oral mucosa and scar-forming wound healing found in adult skin. This review will examine wound healing in the liver and the skin in relation to the role of humoral and cellular factors, as well as the extracellular matrix, in this process. While several therapeutic targets are similar between fibrotic liver and adult skin wound healing, others are unique and represent novel areas for hepatic anti-fibrotic research. In particular, investigations into the role of hyaluronan in liver fibrosis and fibrosis resolution are warranted.
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Affiliation(s)
- Michele T Pritchard
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, 3901 Rainbow Blvd, Kansas City, KS 66161, USA.
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Wen F, Zheng J, Yu J, Gao M, Gao S, Zhou Y, Liu J, Yang Z. Macrophage migration inhibitory factor in the regulation of myoblast proliferation and differentiation. Biosci Biotechnol Biochem 2016; 80:1313-20. [DOI: 10.1080/09168451.2016.1153951] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Abstract
Obesity is documented to be a state of chronic mild inflammation associated with increased macrophage infiltration into adipose tissue and liver and skeletal muscle. As a pleiotropic inflammatory mediator, macrophage migration inhibitory factor (MIF) is associated with metabolic disease, so MIF may signal molecular links between adipocytes and myocytes. MIF expression was modified during myoblast differentiation, but the role of MIF during this process is unclear. C2C12 cells were transfected with MIF to investigate their role during differentiation. MIF expression attenuated C2C12 differentiation. It did not change proliferation, but downregulated cyclin D1 and CDK4, causing cell accumulation in the G1 phase. p21 protein was increased significantly and MyoD, MyoG, and p21 mRNA also increased significantly in the C2C12 cells treated with ISO-1, suggesting that inhibition of MIF promotes differentiation. MIF inhibits the myoblast differentiation by affecting the cell cycle progression, but does not affect proliferation.
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Affiliation(s)
- Fengyun Wen
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, PR China
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, PR China
| | - Jin Zheng
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, PR China
| | - Jing Yu
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, PR China
| | - Mingju Gao
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, PR China
| | - Sumin Gao
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, PR China
| | - Yingying Zhou
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, PR China
| | - Jianyu Liu
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, PR China
| | - Zaiqing Yang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, PR China
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Demidowich AP, Davis AI, Dedhia N, Yanovski JA. Colchicine to decrease NLRP3-activated inflammation and improve obesity-related metabolic dysregulation. Med Hypotheses 2016; 92:67-73. [PMID: 27241260 DOI: 10.1016/j.mehy.2016.04.039] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Revised: 04/18/2016] [Accepted: 04/22/2016] [Indexed: 02/06/2023]
Abstract
Obesity is a major risk-factor for the development of insulin resistance, type 2 diabetes, and cardiovascular disease. Circulating molecules associated with obesity, such as saturated fatty acids and cholesterol crystals, stimulate the innate immune system to incite a chronic inflammatory state. Studies in mouse models suggest that suppressing the obesity-induced chronic inflammatory state may prevent or reverse obesity-associated metabolic dysregulation. Human studies, however, have been far less positive, possibly because targeted interventions were too far downstream of the inciting inflammatory events. Recently, it has been shown that, within adipose tissue macrophages, assembly of a multi-protein member of the innate immune system, the NOD-like receptor family pyrin domain containing 3 (NLRP3) inflammasome, is essential for the induction of this inflammatory state. Microtubules enable the necessary spatial arrangement of the components of the NLRP3 inflammasome in the cell, leading to its activation and propagation of the inflammatory cascade. Colchicine, a medication classically used for gout, mediates its anti-inflammatory effect by inhibiting tubulin polymerization, and has been shown to attenuate macrophage NLRP3 inflammasome arrangement and activation in vitro and in vivo. Given these findings, we hypothesize that, in at-risk individuals (those with obesity-induced inflammation and metabolic dysregulation), long-term colchicine use will lead to suppression of inflammation and thus cause improvements in insulin sensitivity and other obesity-related metabolic impairments.
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Affiliation(s)
- Andrew P Demidowich
- Section on Growth and Obesity, Division of Translational Medicine, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, DHHS, United States.
| | - Angela I Davis
- Section on Growth and Obesity, Division of Translational Medicine, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, DHHS, United States
| | - Nicket Dedhia
- Section on Growth and Obesity, Division of Translational Medicine, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, DHHS, United States
| | - Jack A Yanovski
- Section on Growth and Obesity, Division of Translational Medicine, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, DHHS, United States
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Abstract
Obesity and insulin resistance are associated with chronic inflammation in metabolic tissues such as adipose tissue and the liver. Recently, growing evidence has implicated the intestinal immune system as an important contributor to metabolic disease. Obesity predisposes to altered intestinal immunity and is associated with changes to the gut microbiota, intestinal barrier function, gut-residing innate and adaptive immune cells, and oral tolerance to luminal antigens. Accordingly, the gut immune system may represent a novel therapeutic target for systemic inflammation in insulin resistance. This review discusses the emerging field of intestinal immunity in obesity-related insulin resistance and how it affects metabolic disease.
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Affiliation(s)
- Daniel A Winer
- Diabetes Research Group, Division of Cellular and Molecular Biology, Toronto General Research Institute, University Health Network, 101 College Street, Toronto, ON M5G 1L7, Canada; Department of Immunology, University of Toronto, 1 King's College Circle, Toronto, ON M5S 1A8, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Circle, Toronto, ON M5S 1A8, Canada; Department of Pathology, University Health Network, 200 Elizabeth Street, Toronto, ON M5G 2C4, Canada.
| | - Helen Luck
- Diabetes Research Group, Division of Cellular and Molecular Biology, Toronto General Research Institute, University Health Network, 101 College Street, Toronto, ON M5G 1L7, Canada; Department of Immunology, University of Toronto, 1 King's College Circle, Toronto, ON M5S 1A8, Canada
| | - Sue Tsai
- Diabetes Research Group, Division of Cellular and Molecular Biology, Toronto General Research Institute, University Health Network, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Shawn Winer
- Diabetes Research Group, Division of Cellular and Molecular Biology, Toronto General Research Institute, University Health Network, 101 College Street, Toronto, ON M5G 1L7, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Circle, Toronto, ON M5S 1A8, Canada; Department of Laboratory Medicine, St. Michael's Hospital, 30 Bond Street, Toronto, ON M5B 1W8, Canada.
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Impact of anti-inflammatory nutrients on obesity-associated metabolic-inflammation from childhood through to adulthood. Proc Nutr Soc 2016; 75:115-24. [DOI: 10.1017/s0029665116000070] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Obesity-related metabolic conditions such as insulin resistance (IR), type 2 diabetes and CVD share a number of pathological features, one of which is metabolic-inflammation. Metabolic-inflammation results from the infiltration of immune cells into the adipose tissue, driving a pro-inflammatory environment, which can induce IR. Furthermore, resolution of inflammation, an active process wherein the immune system counteracts pro-inflammatory states, may be dysregulated in obesity. Anti-inflammatory nutritional interventions have focused on attenuating this pro-inflammatory environment. Furthermore, with inherent variability among individuals, establishing at-risk populations who respond favourably to nutritional intervention strategies is important. This review will focus on chronic low-grade metabolic-inflammation, resolution of inflammation and the putative role anti-inflammatory nutrients have as a potential therapy. Finally, in the context of personalised nutrition, the approaches used in defining individuals who respond favourably to nutritional interventions will be highlighted. With increasing prevalence of obesity in younger people, age-dependent biological processes, preventative strategies and therapeutic options are important to help protect against development of obesity-associated co-morbidities.
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Majdoubi A, Kishta OA, Thibodeau J. Role of antigen presentation in the production of pro-inflammatory cytokines in obese adipose tissue. Cytokine 2016; 82:112-21. [PMID: 26854212 DOI: 10.1016/j.cyto.2016.01.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2015] [Revised: 01/27/2016] [Accepted: 01/27/2016] [Indexed: 02/06/2023]
Abstract
Type II diabetes regroups different physiological anomalies that ultimately lead to low-grade chronic inflammation, insulin resistance and loss of pancreatic β-cells. Obesity is one of the best examples of such a condition that can develop into Metabolic Syndrome, causing serious health problems of great socio-economic consequences. The pathological outcome of obesity has a genetic basis and depends on the delicate balance between pro- and anti-inflammatory effectors of the immune system. The causal link between obesity and inflammation is well established. While innate immunity plays a key role in the development of a pro-inflammatory state in obese adipose tissues, it has now become clear that adaptive immune cells are also involved and participate in the cascade of events that lead to metabolic perturbations. The efficacy of some immunotherapeutic protocols in reducing the symptoms of obesity-driven metabolic syndrome in mice implicated all arms of the immune response. Recently, the production of pathogenic immunoglobulins and pro-inflammatory cytokines by B and T lymphocytes suggested an auto-immune basis for the establishment of a non-healthy obese state. Understanding the cellular landscape of obese adipose tissues and how immune cells sustain chronic inflammation holds the key to the development of targeted therapies. In this review, we emphasize the role of antigen-presenting cells and MHC molecules in obese adipose tissue and the general contribution of the adaptive arm of the immune system in inflammation-induced insulin resistance.
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Affiliation(s)
- Abdelilah Majdoubi
- Laboratoire d'Immunologie Moléculaire, Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Québec, Canada
| | - Osama A Kishta
- Laboratoire d'Immunologie Moléculaire, Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Québec, Canada
| | - Jacques Thibodeau
- Laboratoire d'Immunologie Moléculaire, Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Québec, Canada.
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Abstract
Low-grade inflammation in the obese AT (AT) and the liver is a critical player in the development of obesity-related metabolic dysregulation, including insulin resistance, type 2 diabetes and non-alcoholic steatohepatitis (NASH). Myeloid as well as lymphoid cells infiltrate the AT and the liver and expand within these metabolic organs as a result of excessive nutrient intake, thereby exacerbating tissue inflammation. Macrophages are the paramount cell population in the field of metabolism-related inflammation; as obesity progresses, a switch takes place within the AT environment from an M2-alternatively activated macrophage state to an M1-inflammatory macrophage-dominated milieu. M1-polarized macrophages secrete inflammatory cytokines like TNF in the obese AT; such cytokines contribute to insulin resistance in adipocytes. Besides macrophages, also CD8+ T cells promote inflammation in the AT and the liver and thereby the deterioration of the metabolic balance in adipocytes and hepatocytes. Other cells of the innate immunity, such as neutrophils or mast cells, interfere with metabolic homeostasis as well. On the other hand, eosinophils or T-regulatory cells, the number of which in the AT decreases in the course of obesity, function to maintain metabolic balance by ameliorating inflammatory processes. In addition, eosinophils and M2-polarized macrophages may contribute to "beige" adipogenesis under lean conditions; beige adipocytes are located predominantly in the subcutaneous AT and have thermogenic and optimal energy-dispensing properties like brown adipocytes. This chapter will summarize the different aspects of the regulation of homeostasis of metabolic tissues by immune cells.
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Affiliation(s)
- Antonios Chatzigeorgiou
- Department of Clinical Pathobiochemistry, Technische Universität Dresden, Fetscherstrasse 74, 01307, Dresden, Germany.
- Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany.
- Paul Langerhans Institute Dresden, German Center for Diabetes Research, Dresden, Germany.
| | - Triantafyllos Chavakis
- Department of Clinical Pathobiochemistry, Technische Universität Dresden, Fetscherstrasse 74, 01307, Dresden, Germany
- Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
- Paul Langerhans Institute Dresden, German Center for Diabetes Research, Dresden, Germany
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Morrison MC, Kleemann R. Role of Macrophage Migration Inhibitory Factor in Obesity, Insulin Resistance, Type 2 Diabetes, and Associated Hepatic Co-Morbidities: A Comprehensive Review of Human and Rodent Studies. Front Immunol 2015; 6:308. [PMID: 26124760 PMCID: PMC4467247 DOI: 10.3389/fimmu.2015.00308] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 05/29/2015] [Indexed: 12/16/2022] Open
Abstract
Obesity is associated with a chronic low-grade inflammatory state that drives the development of obesity-related co-morbidities such as insulin resistance/type 2 diabetes, non-alcoholic fatty liver disease (NAFLD), and cardiovascular disease. This metabolic inflammation is thought to originate in the adipose tissue, which becomes inflamed and insulin resistant when it is no longer able to expand in response to excess caloric and nutrient intake. The production of inflammatory mediators by dysfunctional adipose tissue is thought to drive the development of more complex forms of disease such as type 2 diabetes and NAFLD. An important factor that may contribute to metabolic inflammation is the cytokine macrophage migration inhibitory factor (MIF). Increasing evidence suggests that MIF is released by adipose tissue in obesity and that it is also involved in metabolic and inflammatory processes that underlie the development of obesity-related pathologies. This review provides a comprehensive summary of our current knowledge on the role of MIF in obesity, its production by adipose tissue, and its involvement in the development of insulin resistance, type 2 diabetes, and NAFLD. We discuss the main findings from recent clinical studies in obese subjects and weight-loss intervention studies as well as results from clinical studies in patients with insulin resistance and type 2 diabetes. Furthermore, we summarize findings from experimental disease models studying the contribution of MIF in obesity and insulin resistance, type 2 diabetes, and hepatic lipid accumulation and fibrosis. Although many of the findings support a pro-inflammatory role of MIF in disease development, recent reports also provide indications that MIF may exert protective effects under certain conditions.
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Affiliation(s)
- Martine C Morrison
- Department of Metabolic Health Research, Netherlands Organization for Applied Scientific Research (TNO) , Leiden , Netherlands
| | - Robert Kleemann
- Department of Metabolic Health Research, Netherlands Organization for Applied Scientific Research (TNO) , Leiden , Netherlands ; Department of Human and Animal Physiology, Wageningen University , Wageningen , Netherlands
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Kim BS, Pallua N, Bernhagen J, Bucala R. The macrophage migration inhibitory factor protein superfamily in obesity and wound repair. Exp Mol Med 2015; 47:e161. [PMID: 25930990 PMCID: PMC4454997 DOI: 10.1038/emm.2015.26] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Accepted: 02/03/2015] [Indexed: 12/15/2022] Open
Abstract
The rising number of obese individuals has become a major burden to the healthcare systems worldwide. Obesity includes not only the increase of adipose tissue mass but importantly also the altered cellular functions that collectively lead to a chronic state of adipose tissue inflammation, insulin resistance and impaired wound healing. Adipose tissue undergoing chronic inflammation shows altered cytokine expression and an accumulation of adipose tissue macrophages (ATM). The macrophage migration inhibitory factor (MIF) superfamily consists of MIF and the recently identified homolog D-dopachrome tautomerase (D-DT or MIF-2). MIF and D-DT, which both bind to the CD74/CD44 receptor complex, are differentially expressed in adipose tissue and have distinct roles in adipogenesis. MIF positively correlates with obesity as well as insulin resistance and contributes to adipose tissue inflammation by modulating ATM functions. D-DT, however, is negatively correlated with obesity and reverses glucose intolerance. In this review, their respective roles in adipose tissue homeostasis, adipose tissue inflammation, insulin resistance and impaired wound healing will be reviewed.
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Affiliation(s)
- Bong-Sung Kim
- 1] Department of Medicine, Yale University School of Medicine, New Haven, CT, USA [2] Institute of Biochemistry and Molecular Cell Biology, RWTH Aachen University, Aachen, Germany [3] Department of Plastic and Reconstructive Surgery, Hand Surgery-Burn Center, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Norbert Pallua
- Department of Plastic and Reconstructive Surgery, Hand Surgery-Burn Center, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Jürgen Bernhagen
- Institute of Biochemistry and Molecular Cell Biology, RWTH Aachen University, Aachen, Germany
| | - Richard Bucala
- Department of Medicine, Yale University School of Medicine, New Haven, CT, USA
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