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Wang H, He W, Yang G, Zhu L, Liu X. The Impact of Weight Cycling on Health and Obesity. Metabolites 2024; 14:344. [PMID: 38921478 PMCID: PMC11205792 DOI: 10.3390/metabo14060344] [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: 05/22/2024] [Revised: 06/13/2024] [Accepted: 06/14/2024] [Indexed: 06/27/2024] Open
Abstract
Obesity is a systemic and chronic inflammation, which seriously endangers people's health. People tend to diet to control weight, and the short-term effect of dieting in losing weight is significant, but the prognosis is limited. With weight loss and recovery occurring frequently, people focus on weight cycling. The effect of weight cycling on a certain tissue of the body also has different conclusions. Therefore, this article systematically reviews the effects of body weight cycling on the body and finds that multiple weight cycling (1) increased fat deposition in central areas, lean mass decreased in weight loss period, and fat mass increased in weight recovery period, which harms body composition and skeletal muscle mass; (2) enhanced the inflammatory response of adipose tissue, macrophages infiltrated into adipose tissue, and increased the production of pro-inflammatory mediators in adipocytes; (3) blood glucose concentration mutation and hyperinsulinemia caused the increase or decrease in pancreatic β-cell population, which makes β-cell fatigue and leads to β-cell failure; (4) resulted in additional burden on the cardiovascular system because of cardiovascular rick escalation. Physical activity combined with calorie restriction can effectively reduce metabolic disease and chronic inflammation, alleviating the adverse effects of weight cycling on the body.
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Affiliation(s)
- Huan Wang
- Graduate School, Guangzhou Sport University, Guangzhou 510500, China; (H.W.); (W.H.); (G.Y.)
| | - Wenbi He
- Graduate School, Guangzhou Sport University, Guangzhou 510500, China; (H.W.); (W.H.); (G.Y.)
| | - Gaoyuan Yang
- Graduate School, Guangzhou Sport University, Guangzhou 510500, China; (H.W.); (W.H.); (G.Y.)
| | - Lin Zhu
- Graduate School, Guangzhou Sport University, Guangzhou 510500, China; (H.W.); (W.H.); (G.Y.)
- Guangdong Provincial Key Laboratory of Physical Activity and Health Promotion, Guangzhou Sport University, Guangzhou 510500, China
| | - Xiaoguang Liu
- Graduate School, Guangzhou Sport University, Guangzhou 510500, China; (H.W.); (W.H.); (G.Y.)
- Guangdong Provincial Key Laboratory of Physical Activity and Health Promotion, Guangzhou Sport University, Guangzhou 510500, China
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Li H, Meng Y, He S, Tan X, Zhang Y, Zhang X, Wang L, Zheng W. Macrophages, Chronic Inflammation, and Insulin Resistance. Cells 2022; 11:cells11193001. [PMID: 36230963 PMCID: PMC9562180 DOI: 10.3390/cells11193001] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/08/2022] [Accepted: 09/22/2022] [Indexed: 11/16/2022] Open
Abstract
The prevalence of obesity has reached alarming levels, which is considered a major risk factor for several metabolic diseases, including type 2 diabetes (T2D), non-alcoholic fatty liver, atherosclerosis, and ischemic cardiovascular disease. Obesity-induced chronic, low-grade inflammation may lead to insulin resistance, and it is well-recognized that macrophages play a major role in such inflammation. In the current review, the molecular mechanisms underlying macrophages, low-grade tissue inflammation, insulin resistance, and T2D are described. Also, the role of macrophages in obesity-induced insulin resistance is presented, and therapeutic drugs and recent advances targeting macrophages for the treatment of T2D are introduced.
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Affiliation(s)
- He Li
- Beijing City Key Laboratory of Drug Delivery Technology and Novel Formulation, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Ya Meng
- Beijing City Key Laboratory of Drug Delivery Technology and Novel Formulation, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Shuwang He
- Shandong DYNE Marine Biopharmaceutical Co., Ltd., Rongcheng 264300, China
| | - Xiaochuan Tan
- Beijing City Key Laboratory of Drug Delivery Technology and Novel Formulation, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Yujia Zhang
- Beijing City Key Laboratory of Drug Delivery Technology and Novel Formulation, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Xiuli Zhang
- Beijing City Key Laboratory of Drug Delivery Technology and Novel Formulation, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Lulu Wang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, China
- Correspondence: (L.W.); (W.Z.); Tel.: +86-010-63165233 (W.Z.)
| | - Wensheng Zheng
- Beijing City Key Laboratory of Drug Delivery Technology and Novel Formulation, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
- Correspondence: (L.W.); (W.Z.); Tel.: +86-010-63165233 (W.Z.)
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Abstract
Obesity is a prevalent health risk by inducing chronic, low-grade inflammation and insulin resistance, in part from adipose tissue inflammation perpetuated by activated B cells and other resident immune cells. However, regulatory mechanisms controlling B-cell actions in adipose tissue remain poorly understood, limiting therapeutic innovations. MicroRNAs are potent regulators of immune cell dynamics through fine-tuning a network of downstream genes in multiple signaling pathways. In particular, miR-150 is crucial to B-cell development and suppresses obesity-associated inflammation via regulating adipose tissue B-cell function. Herein, we review the effect of microRNAs on B-cell development, activation, and function and highlight miR-150-regulated B-cell actions during obesity which modulate systemic inflammation and insulin resistance. In this way, we hope to promote translational discoveries that mitigate obesity-induced health risks by targeting microRNA-regulated B-cell actions.
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Chudakov DB, Kotsareva OD, Konovalova MV, Tsaregorodtseva DS, Shevchenko MA, Sergeev AA, Fattakhova GV. Early IgE Production Is Linked with Extrafollicular B- and T-Cell Activation in Low-Dose Allergy Model. Vaccines (Basel) 2022; 10:vaccines10060969. [PMID: 35746576 PMCID: PMC9231339 DOI: 10.3390/vaccines10060969] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Revised: 06/01/2022] [Accepted: 06/14/2022] [Indexed: 12/23/2022] Open
Abstract
Despite its paramount importance, the predominant association of early IgE production with harmless antigens, via germinal-center B- and T-cell subpopulations or extrafollicular activation, remains unresolved. The aim of this work was to clarify whether the reinforced IgE production following the subcutaneous immunization of BALB/c mice with low antigen doses in withers adipose tissue might be linked with intensified extrafollicular or germinal-center responses. The mice were immunized three times a week for 4 weeks in the withers region, which is enriched in subcutaneous fat and tissue-associated B cells, with high and low OVA doses and via the intraperitoneal route for comparison. During long-term immunization with both low and high antigen doses in the withers region, but not via the intraperitoneal route, we observed a significant accumulation of B220-CD1d-CD5-CD19+ B-2 extrafollicular plasmablasts in the subcutaneous fat and regional lymph nodes but not in the intraperitoneal fat. Only low antigen doses induced a significant accumulation of CXCR4+ CXCR5- CD4+ extrafollicular T helpers in the withers adipose tissue but not in the regional lymph nodes or abdominal fat. Only in subcutaneous fat was there a combination of extrafollicular helper accumulation. In conclusion, extrafollicular B- and T-cell activation are necessary for early IgE class switching.
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Affiliation(s)
- Dmitrii Borisovich Chudakov
- Laboratory of Cell Interactions, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 16/10 Miklukho-Maklaya St., 117997 Moscow, Russia; (O.D.K.); (M.V.K.); (M.A.S.); (A.A.S.); (G.V.F.)
- Correspondence: ; Tel.: +7-495-330-4011
| | - Olga Dmitrievna Kotsareva
- Laboratory of Cell Interactions, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 16/10 Miklukho-Maklaya St., 117997 Moscow, Russia; (O.D.K.); (M.V.K.); (M.A.S.); (A.A.S.); (G.V.F.)
| | - Maryia Vladimirovna Konovalova
- Laboratory of Cell Interactions, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 16/10 Miklukho-Maklaya St., 117997 Moscow, Russia; (O.D.K.); (M.V.K.); (M.A.S.); (A.A.S.); (G.V.F.)
| | - Daria Sergeevna Tsaregorodtseva
- Faculty of Medical Biology, Sechenov First Moscow State Medical University, 2 Bolshaya Pirogovskaya St., 1194535 Moscow, Russia;
| | - Marina Alexandrovna Shevchenko
- Laboratory of Cell Interactions, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 16/10 Miklukho-Maklaya St., 117997 Moscow, Russia; (O.D.K.); (M.V.K.); (M.A.S.); (A.A.S.); (G.V.F.)
| | - Anton Andreevich Sergeev
- Laboratory of Cell Interactions, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 16/10 Miklukho-Maklaya St., 117997 Moscow, Russia; (O.D.K.); (M.V.K.); (M.A.S.); (A.A.S.); (G.V.F.)
| | - Gulnar Vaisovna Fattakhova
- Laboratory of Cell Interactions, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 16/10 Miklukho-Maklaya St., 117997 Moscow, Russia; (O.D.K.); (M.V.K.); (M.A.S.); (A.A.S.); (G.V.F.)
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Assumpção JAF, Pasquarelli-do-Nascimento G, Duarte MSV, Bonamino MH, Magalhães KG. The ambiguous role of obesity in oncology by promoting cancer but boosting antitumor immunotherapy. J Biomed Sci 2022; 29:12. [PMID: 35164764 PMCID: PMC8842976 DOI: 10.1186/s12929-022-00796-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 02/07/2022] [Indexed: 12/13/2022] Open
Abstract
Obesity is nowadays considered a pandemic which prevalence's has been steadily increasingly in western countries. It is a dynamic, complex, and multifactorial disease which propitiates the development of several metabolic and cardiovascular diseases, as well as cancer. Excessive adipose tissue has been causally related to cancer progression and is a preventable risk factor for overall and cancer-specific survival, associated with poor prognosis in cancer patients. The onset of obesity features a state of chronic low-grade inflammation and secretion of a diversity of adipocyte-derived molecules (adipokines, cytokines, hormones), responsible for altering the metabolic, inflammatory, and immune landscape. The crosstalk between adipocytes and tumor cells fuels the tumor microenvironment with pro-inflammatory factors, promoting tissue injury, mutagenesis, invasion, and metastasis. Although classically established as a risk factor for cancer and treatment toxicity, recent evidence suggests mild obesity is related to better outcomes, with obese cancer patients showing better responses to treatment when compared to lean cancer patients. This phenomenon is termed obesity paradox and has been reported in different types and stages of cancer. The mechanisms underlying this paradoxical relationship between obesity and cancer are still not fully described but point to systemic alterations in metabolic fitness and modulation of the tumor microenvironment by obesity-associated molecules. Obesity impacts the response to cancer treatments, such as chemotherapy and immunotherapy, and has been reported as having a positive association with immune checkpoint therapy. In this review, we discuss obesity's association to inflammation and cancer, also highlighting potential physiological and biological mechanisms underlying this association, hoping to clarify the existence and impact of obesity paradox in cancer development and treatment.
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Affiliation(s)
| | | | - Mariana Saldanha Viegas Duarte
- Immunology and Tumor Biology Program - Research Coordination, Brazilian National Cancer Institute (INCA), Rio de Janeiro, Brazil
| | - Martín Hernan Bonamino
- Immunology and Tumor Biology Program - Research Coordination, Brazilian National Cancer Institute (INCA), Rio de Janeiro, Brazil
- Vice - Presidency of Research and Biological Collections (VPPCB), Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, Brazil
| | - Kelly Grace Magalhães
- Laboratory of Immunology and Inflammation, Department of Cell Biology, University of Brasilia, Brasília, DF, Brazil.
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Villarreal-Calderón JR, Castillo EC, Cuellar-Tamez RX, García-Garza M, Elizondo-Montemayor L, García-Rivas G. Reduced Th1 response is associated with lower glycolytic activity in activated peripheral blood mononuclear cells after metabolic and bariatric surgery. J Endocrinol Invest 2021; 44:2819-2830. [PMID: 33991317 DOI: 10.1007/s40618-021-01587-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 04/30/2021] [Indexed: 12/31/2022]
Abstract
BACKGROUND Obesity promotes cellular immunometabolism changes that trigger the activation of macrophages and lymphocytes, leading to systemic inflammation. Activated leukocytes undergo metabolic reprogramming, increasing glycolytic activity. OBJECTIVE To examine whether the reduction in the inflammatory state associated with bariatric surgery is associated with decreased glycolytic activity in leukocytes. Setting Single-center, prospective observational study. METHODS This study involved 18 patients with obesity undergoing bariatric surgery. All measurements were performed preoperatively and six months postoperatively. Peripheral blood mononuclear cells and plasma were obtained to determine the glycolytic rate and mitochondrial membrane potential as surrogates of the metabolic switching and high-sensitivity C-reactive protein, adipokines, and CD69 expression as inflammatory and activation markers. RESULTS Glycolytic activity engaged by CD3/CD28 activation was reduced six months after bariatric surgery, associated with decreased levels of T helper (Th) 1 and Th17 signature cytokines. An overall reduction in inflammatory markers was observed, which correlated with a higher adiponectin/leptin ratio. CONCLUSIONS Metabolic and bariatric surgery-induced weight loss leads to reprogramming in T cells' metabolic machinery, resulting in reduced stimulation of glycolysis after activation, which may explain the decrease in systemic inflammation mediated by cytokines such as interferon-γ and interleukin-17A.
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Affiliation(s)
- J R Villarreal-Calderón
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Cátedra de Cardiología y Medicina Vascular, Ave. Morones Prieto 3000, 64710, Monterrey, NL, Mexico
| | - E C Castillo
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Cátedra de Cardiología y Medicina Vascular, Ave. Morones Prieto 3000, 64710, Monterrey, NL, Mexico
| | - R X Cuellar-Tamez
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Cátedra de Cardiología y Medicina Vascular, Ave. Morones Prieto 3000, 64710, Monterrey, NL, Mexico
| | | | - L Elizondo-Montemayor
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Cátedra de Cardiología y Medicina Vascular, Ave. Morones Prieto 3000, 64710, Monterrey, NL, Mexico.
- Tecnologico de Monterrey, Centro de Investigación en Nutrición Clínica y Obesidad, Monterrey, NL, Mexico.
| | - G García-Rivas
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Cátedra de Cardiología y Medicina Vascular, Ave. Morones Prieto 3000, 64710, Monterrey, NL, Mexico.
- Tecnologico de Monterrey, Centro de Investigación Biomédica, Hospital Zambrano Hellion, TecSalud, 66278, San Pedro Garza García, NL, Mexico.
- Tecnologico de Monterrey, Centro de Medicina Funcional, Hospital Zambrano Hellion, TecSalud, San Pedro Garza García, NL, Mexico.
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de Mol J, Kuiper J, Tsiantoulas D, Foks AC. The Dynamics of B Cell Aging in Health and Disease. Front Immunol 2021; 12:733566. [PMID: 34675924 PMCID: PMC8524000 DOI: 10.3389/fimmu.2021.733566] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 09/16/2021] [Indexed: 12/30/2022] Open
Abstract
Aging is considered to be an important risk factor for several inflammatory diseases. B cells play a major role in chronic inflammatory diseases by antibody secretion, antigen presentation and T cell regulation. Different B cell subsets have been implicated in infections and multiple autoimmune diseases. Since aging decreases B cell numbers, affects B cell subsets and impairs antibody responses, the aged B cell is expected to have major impacts on the development and progression of these diseases. In this review, we summarize the role of B cells in health and disease settings, such as atherosclerotic disease. Furthermore, we provide an overview of age-related changes in B cell development and function with respect to their impact in chronic inflammatory diseases.
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Affiliation(s)
- Jill de Mol
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, Netherlands
| | - Johan Kuiper
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, Netherlands
| | | | - Amanda C Foks
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, Netherlands
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Thomas AL, Alarcon PC, Divanovic S, Chougnet CA, Hildeman DA, Moreno-Fernandez ME. Implications of Inflammatory States on Dysfunctional Immune Responses in Aging and Obesity. FRONTIERS IN AGING 2021; 2:732414. [PMID: 35822048 PMCID: PMC9261339 DOI: 10.3389/fragi.2021.732414] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 08/25/2021] [Indexed: 12/16/2022]
Abstract
Aging and obesity are two conditions characterized by chronic, low-grade inflammation. While both conditions are also associated with dysfunctional immune responses, the shared and distinct underlying mechanisms are just starting to be uncovered. In fact, recent findings have suggested that the effects of obesity on the immune system can be thought of as a state of accelerated aging. Here we propose that chronic, low-grade inflammation seen in obesity and aging is complex, affects multiple cell types, and results in an altered basal immune state. In aging, part of this altered state is the emergence of regulatory immune populations that lead to further immune dysfunction in an attempt to reduce chronic inflammation. While in obesity, part of the altered state is the effect of expanding adipose tissue on immune cell function. Thus, in this review, we compare, and contrast altered immune states in aging and obesity and discuss their potential contribution to a shared clinical problem- decreased vaccine responsiveness.
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Affiliation(s)
- Alyssa L. Thomas
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States
- Division of Immunobiology Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
- Immunology Graduate Program and Medical Scientist Training Program, Cincinnati Children's Hospital Medical Center and The University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Pablo C. Alarcon
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States
- Division of Immunobiology Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
- Immunology Graduate Program and Medical Scientist Training Program, Cincinnati Children's Hospital Medical Center and The University of Cincinnati College of Medicine, Cincinnati, OH, United States
- Medical Scientist Training Program, Cincinnati Children’s Hospital Medical Center and The University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Senad Divanovic
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States
- Division of Immunobiology Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
- Immunology Graduate Program and Medical Scientist Training Program, Cincinnati Children's Hospital Medical Center and The University of Cincinnati College of Medicine, Cincinnati, OH, United States
- Medical Scientist Training Program, Cincinnati Children’s Hospital Medical Center and The University of Cincinnati College of Medicine, Cincinnati, OH, United States
- Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
| | - Claire A. Chougnet
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States
- Division of Immunobiology Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
- Immunology Graduate Program and Medical Scientist Training Program, Cincinnati Children's Hospital Medical Center and The University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - David A. Hildeman
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States
- Division of Immunobiology Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
- Immunology Graduate Program and Medical Scientist Training Program, Cincinnati Children's Hospital Medical Center and The University of Cincinnati College of Medicine, Cincinnati, OH, United States
- Medical Scientist Training Program, Cincinnati Children’s Hospital Medical Center and The University of Cincinnati College of Medicine, Cincinnati, OH, United States
- Center for Transplant Immunology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
| | - Maria E. Moreno-Fernandez
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States
- Division of Immunobiology Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
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Insulin resistance is linked to a specific profile of immune activation in human subjects. Sci Rep 2021; 11:12314. [PMID: 34112902 PMCID: PMC8192510 DOI: 10.1038/s41598-021-91758-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 05/19/2021] [Indexed: 11/08/2022] Open
Abstract
We tested the hypothesis that a particular immune activation profile might be correlated with insulin resistance in a general population. By measuring 43 markers of immune, endothelial, and coagulation activation, we have previously shown that five different immune activation profiles may be distinguished in 150 volunteers. One of these profiles, Profile 2, characterized by CD4+ T cell senescence, inflammation, monocyte, B cell, and endothelial activation, presented elevated insulinemia, glycemia, triglyceridemia, and γ-glutamyl transferase, a marker of liver injury, in comparison with other profiles. Our data are compatible with a model in which a particular immune activation profile might favor the development of insulin resistance and metabolic syndrome. In this hypothesis, identification of this profile, that is feasible with only 3 markers with an error rate of 5%, might allow to personalize the screening and prevention of metabolic syndrome-driven morbidities as liver steatosis.
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Crouch M, Al-Shaer A, Shaikh SR. Hormonal Dysregulation and Unbalanced Specialized Pro-Resolving Mediator Biosynthesis Contribute toward Impaired B Cell Outcomes in Obesity. Mol Nutr Food Res 2021; 65:e1900924. [PMID: 32112513 PMCID: PMC8627245 DOI: 10.1002/mnfr.201900924] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 02/09/2020] [Indexed: 12/16/2022]
Abstract
Diet-induced obesity is associated with impaired B-cell-driven humoral immunity, which coincides with chronic inflammation and has consequences for responses to infections and vaccinations. Key nutritional, cellular, and molecular mechanisms by which obesity may impair aspects of humoral immunity such as B cell development, class switch recombination, and formation of long-lived antibody secreting cells are reviewed. A key theme to emerge is the central role of white adipose tissue on the formation and function of pro-inflammatory B cell subsets that exacerbate insulin resistance. The underlying role of select hormones such as leptin is highlighted, which may be driving the formation of pro-inflammatory B cells in the absence of antigen stimulation. This review also extensively covers the regulatory role of lipid metabolites such as prostaglandins and specialized pro-resolving mediators (SPMs) that are synthesized from polyunsaturated fatty acids. Notably, SPM biosynthesis is impaired in obesity and contributes toward impaired antibody production. Future directions for research, including avenues for therapeutic intervention, are included.
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Affiliation(s)
- Miranda Crouch
- Department of Nutrition, Gillings School of Global Public Health and School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Abrar Al-Shaer
- Department of Nutrition, Gillings School of Global Public Health and School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Saame Raza Shaikh
- Department of Nutrition, Gillings School of Global Public Health and School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
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Kawai T, Autieri MV, Scalia R. Adipose tissue inflammation and metabolic dysfunction in obesity. Am J Physiol Cell Physiol 2020; 320:C375-C391. [PMID: 33356944 DOI: 10.1152/ajpcell.00379.2020] [Citation(s) in RCA: 562] [Impact Index Per Article: 140.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Several lines of preclinical and clinical research have confirmed that chronic low-grade inflammation of adipose tissue is mechanistically linked to metabolic disease and organ tissue complications in the overweight and obese organism. Despite this widely confirmed paradigm, numerous open questions and knowledge gaps remain to be investigated. This is mainly due to the intricately intertwined cross-talk of various pro- and anti-inflammatory signaling cascades involved in the immune response of expanding adipose depots, particularly the visceral adipose tissue. Adipose tissue inflammation is initiated and sustained over time by dysfunctional adipocytes that secrete inflammatory adipokines and by infiltration of bone marrow-derived immune cells that signal via production of cytokines and chemokines. Despite its low-grade nature, adipose tissue inflammation negatively impacts remote organ function, a phenomenon that is considered causative of the complications of obesity. The aim of this review is to broadly present an overview of adipose tissue inflammation by highlighting the most recent reports in the scientific literature and summarizing our overall understanding of the field. We also discuss key endogenous anti-inflammatory mediators and analyze their mechanistic role(s) in the pathogenesis and treatment of adipose tissue inflammation. In doing so, we hope to stimulate studies to uncover novel physiological, cellular, and molecular targets for the treatment of obesity.
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Affiliation(s)
- Tatsuo Kawai
- The Cardiovascular Research Center and The Limole Center for Integrated Lymphatic Research, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania
| | - Michael V Autieri
- The Cardiovascular Research Center and The Limole Center for Integrated Lymphatic Research, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania
| | - Rosario Scalia
- The Cardiovascular Research Center and The Limole Center for Integrated Lymphatic Research, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania
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Cinkajzlová A, Anderlová K, Šimják P, Lacinová Z, Kloučková J, Kratochvílová H, Krejčí H, Pařízek A, Mráz M, Kršek M, Haluzík M. Subclinical Inflammation and Adipose Tissue Lymphocytes in Pregnant Females With Gestational Diabetes Mellitus. J Clin Endocrinol Metab 2020; 105:5892793. [PMID: 32797183 DOI: 10.1210/clinem/dgaa528] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Accepted: 08/09/2020] [Indexed: 12/17/2022]
Abstract
CONTEXT Gestational diabetes mellitus (GDM) is accompanied by subclinical inflammation; however, little is known about local inflammation in adipose tissue and placenta. OBJECTIVE To analyze systemic and local subclinical inflammation and adipose tissue lymphocyte content and phenotype in pregnant women with and without GDM. DESIGN Observational study. SETTINGS Academic hospital. PATIENTS Twenty-one pregnant women with GDM (GDM group), 16 pregnant women without GDM (non-GDM group) and 15 nonpregnant control women (N group). INTERVENTIONS Serum samples taken at 28 to 32 (visit 1 [V1]) and 36 to 38 (V2) gestational weeks and 6 to 12 months after delivery (V3) in the GDM and non-GDM group and before elective gynecological surgery in the N group. Subcutaneous (SAT) and visceral adipose tissue (VAT) obtained during cesarean delivery or surgery. MAIN OUTCOME MEASURES Serum levels and adipose tissue expression of proinflammatory cytokines, adipose tissue lymphocyte content and phenotype (for a subset of GDM and non-GDM subjects). RESULTS Accented proinflammatory state in GDM was documented by increased circulating tumor necrosis factor-α (TNF-α) levels. In both groups of pregnant females total lymphocytes were higher in VAT compared to SAT. In GDM subjects B cells and NKT cells were higher in SAT compared to VAT and T helper cells were increased relative to SAT of non-GDM group, while no intercompartmental adipose tissue differences were seen in non-GDM women. CONCLUSIONS Pregnant females had higher total lymphocyte count in VAT relative to SAT regardless of GDM. In addition to increased systemic subclinical inflammation, GDM was associated with significant differences in lymphocyte composition between subcutaneous and visceral adipose tissue depots.
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Affiliation(s)
- Anna Cinkajzlová
- Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - Kateřina Anderlová
- 3rd Department of Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
- Department of Gynecology and Obstetrics, First Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - Patrik Šimják
- Department of Gynecology and Obstetrics, First Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - Zdeňka Lacinová
- Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - Jana Kloučková
- Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - Helena Kratochvílová
- Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - Hana Krejčí
- 3rd Department of Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
- Department of Gynecology and Obstetrics, First Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - Antonín Pařízek
- Department of Gynecology and Obstetrics, First Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - Miloš Mráz
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
- Department of Diabetes, Diabetes Centre, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Michal Kršek
- 3rd Department of Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - Martin Haluzík
- Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
- Department of Diabetes, Diabetes Centre, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
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13
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Cuellar-Tamez RX, Villarreal-Calderon JR, Rubio-Infante N, Castillo EC, García-Garza M, Elizondo-Montemayor L, García-Rivas G. Bariatric surgery-induced weight loss reduces B cell activating cytokines and IgG immunoglobulins related to autoimmunity. Surg Endosc 2020; 35:5147-5158. [DOI: 10.1007/s00464-020-08004-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 09/16/2020] [Indexed: 12/16/2022]
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14
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Castillo EC, Vázquez-Garza E, Yee-Trejo D, García-Rivas G, Torre-Amione G. What Is the Role of the Inflammation in the Pathogenesis of Heart Failure? Curr Cardiol Rep 2020; 22:139. [PMID: 32910299 PMCID: PMC7481763 DOI: 10.1007/s11886-020-01382-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
PURPOSE OF REVIEW In heart failure, whether it is associated with reduced or preserved ejection fraction, the immune system is activated and contributes to heart remodeling and impaired function. RECENT FINDINGS Studies indicate that cells of the immune system not only play a role in the pathology but are also critical regulators of heart function. Knowledge about the role of the immune system driving heart failure will lead to the development of new targets to this system, particularly in those patients that, despite the apparent wellness, relapse and worsen. In this review, we will address the diverse mechanisms that trigger inflammation and their impact on heart failure progression.
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Affiliation(s)
- Elena C. Castillo
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Ave. Morones Prieto 3000, 64710 Monterrey, NL Mexico
| | - Eduardo Vázquez-Garza
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Ave. Morones Prieto 3000, 64710 Monterrey, NL Mexico
| | - David Yee-Trejo
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Ave. Morones Prieto 3000, 64710 Monterrey, NL Mexico
| | - Gerardo García-Rivas
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Ave. Morones Prieto 3000, 64710 Monterrey, NL Mexico
- Tecnologico de Monterrey, Centro de Investigación Biomédica, Hospital Zambrano Hellion, TecSalud, 66278 San Pedro Garza García, NL Mexico
- Tecnologico de Monterrey, Centro de Medicina Funcional, Hospital Zambrano Hellion, TecSalud, 66278 San Pedro Garzar García, NL Mexico
| | - Guillermo Torre-Amione
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Ave. Morones Prieto 3000, 64710 Monterrey, NL Mexico
- Tecnologico de Monterrey, Centro de Investigación Biomédica, Hospital Zambrano Hellion, TecSalud, 66278 San Pedro Garza García, NL Mexico
- De Bakey CRC, The Methodist Hospital, Cornell University, Houston, TX USA
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15
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Abstract
Obesity is becoming an epidemic in the United States and worldwide and increases risk for many diseases, particularly insulin resistance, type 2 diabetes mellitus, and cardiovascular disease. The mechanisms linking obesity with these diseases remain incompletely understood. Over the past 2 to 3 decades, it has been recognized that in obesity, inflammation, with increased accumulation and inflammatory polarization of immune cells, takes place in various tissues, including adipose tissue, skeletal muscle, liver, gut, pancreatic islet, and brain and may contribute to obesity-linked metabolic dysfunctions, leading to insulin resistance and type 2 diabetes mellitus. Therapies targeting inflammation have shed light on certain obesity-linked diseases, including type 2 diabetes mellitus and atherosclerotic cardiovascular disease, but remain to be tested further and confirmed in clinical trials. This review focuses on inflammation in adipose tissue and its potential role in insulin resistance associated with obesity.
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Affiliation(s)
- Huaizhu Wu
- From the Department of Medicine (H.W., C.M.B.), Baylor College of Medicine, Houston, TX.,Department of Pediatrics (H.W.), Baylor College of Medicine, Houston, TX
| | - Christie M Ballantyne
- From the Department of Medicine (H.W., C.M.B.), Baylor College of Medicine, Houston, TX.,Department of Molecular and Human Genetics (C.M.B.), Baylor College of Medicine, Houston, TX.,Center for Cardiometabolic Disease Prevention (C.M.B.), Baylor College of Medicine, Houston, TX
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16
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Abstract
The immune system plays an important role in obesity-induced adipose tissue inflammation and the resultant metabolic dysfunction, which can lead to hypertension, dyslipidemia, and insulin resistance and their downstream sequelae of type 2 diabetes mellitus and cardiovascular disease. While macrophages are the most abundant immune cell type in adipose tissue, other immune cells are also present, such as B cells, which play important roles in regulating adipose tissue inflammation. This brief review will overview B-cell subsets, describe their localization in various adipose depots and summarize our knowledge about the function of these B-cell subsets in regulating adipose tissue inflammation, obesity-induced metabolic dysfunction and atherosclerosis.
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Affiliation(s)
- Prasad Srikakulapu
- From the Cardiovascular Research Center, Cardiovascular Division, Department of Medicine, University of Virginia, Charlottesville
| | - Coleen A McNamara
- From the Cardiovascular Research Center, Cardiovascular Division, Department of Medicine, University of Virginia, Charlottesville
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17
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Interplay between the Adaptive Immune System and Insulin Resistance in Weight Loss Induced by Bariatric Surgery. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:3940739. [PMID: 31885787 PMCID: PMC6925764 DOI: 10.1155/2019/3940739] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 11/05/2019] [Accepted: 11/25/2019] [Indexed: 02/06/2023]
Abstract
Low-grade chronic inflammation plays a pivotal role among other pathophysiological mechanisms involved in obesity. Innate and adaptive immune cells undergo systemic proinflammatory polarization that gives rise to an increased secretion of proinflammatory cytokines, which in turn leads to insulin resistance. Bariatric surgery is currently the most effective treatment for obesity, as it brings on significant weight loss, glucose metabolism improvement, and a decrease in systemic inflammation biomarkers. After bariatric surgery, several changes have been reported to occur in adaptive immunity, including reduction in CD4+ and CD8+ T cell counts, a decrease in the Th1/Th2 ratio, an increase in B regulatory cells, and reduction in proinflammatory cytokine secretion. Overall, there seems to be a major shift in several lymphocyte populations from a proinflammatory to an anti-inflammatory phenotype. Furthermore, increased antioxidant activity and reduced lipid and DNA oxidation products have been reported after bariatric surgery in circulating mononuclear cells. This paper highlights the shift in the adaptive immune system in response to weight loss and improved insulin sensitivity, as well as the interplay between immunological and metabolic adaptations as a result of bariatric surgery. Finally, based on data from research, we propose several mechanisms such as changes in adaptive immune cell phenotypes and their by-products, recruitment in adipose tissue, reduced oxidative stress, and modification in metabolic substrate availability as drivers to reduce low-grade chronic inflammation after bariatric surgery in severe obesity.
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18
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Aging Induces an Nlrp3 Inflammasome-Dependent Expansion of Adipose B Cells That Impairs Metabolic Homeostasis. Cell Metab 2019; 30:1024-1039.e6. [PMID: 31735593 PMCID: PMC6944439 DOI: 10.1016/j.cmet.2019.10.006] [Citation(s) in RCA: 127] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 08/10/2019] [Accepted: 10/15/2019] [Indexed: 12/23/2022]
Abstract
During aging, visceral adiposity is often associated with alterations in adipose tissue (AT) leukocytes, inflammation, and metabolic dysfunction. However, the contribution of AT B cells in immunometabolism during aging is unexplored. Here, we show that aging is associated with an expansion of a unique population of resident non-senescent aged adipose B cells (AABs) found in fat-associated lymphoid clusters (FALCs). AABs are transcriptionally distinct from splenic age-associated B cells (ABCs) and show greater expansion in female mice. Functionally, whole-body B cell depletion restores proper lipolysis and core body temperature maintenance during cold stress. Mechanistically, the age-induced FALC formation, AAB, and splenic ABC expansion is dependent on the Nlrp3 inflammasome. Furthermore, AABs express IL-1R, and inhibition of IL-1 signaling reduces their proliferation and increases lipolysis in aging. These data reveal that inhibiting Nlrp3-dependent B cell accumulation can be targeted to reverse metabolic impairment in aging AT.
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19
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Bauknight DK, Osinski V, Dasa SSK, Nguyen AT, Marshall MA, Hartman J, Harms M, O’Mahony G, Boucher J, Klibanov AL, McNamara CA, Kelly KA. Importance of thorough tissue and cellular level characterization of targeted drugs in the evaluation of pharmacodynamic effects. PLoS One 2019; 14:e0224917. [PMID: 31725756 PMCID: PMC6855449 DOI: 10.1371/journal.pone.0224917] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 10/24/2019] [Indexed: 12/31/2022] Open
Abstract
Targeted nanoparticle delivery is a promising strategy for increasing efficacy and limiting side effects of therapeutics. When designing a targeted liposomal formulation, the in vivo biodistribution of the particles must be characterized to determine the value of the targeting approach. Peroxisome proliferator-activated receptor (PPAR) agonists effectively treat metabolic syndrome by decreasing dyslipidemia and insulin resistance but side effects have limited their use, making them a class of compounds that could benefit from targeted liposomal delivery. The adipose targeting sequence peptide (ATS) could fit this role, as it has been shown to bind to adipose tissue endothelium and induce weight loss when delivered conjugated to a pro-apoptotic peptide. To date, however, a full assessment of ATS in vivo biodistribution has not been reported, leaving important unanswered questions regarding the exact mechanisms whereby ATS targeting enhances therapeutic efficacy. We designed this study to evaluate the biodistribution of ATS-conjugated liposomes loaded with the PPARα/γ dual agonist tesaglitazar in leptin-deficient ob/ob mice. The ATS-liposome biodistribution in adipose tissue and other organs was examined at the cellular and tissue level using microscopy, flow cytometry, and fluorescent molecular tomography. Changes in metabolic parameters and gene expression were measured by target and off-target tissue responses to the treatment. Unexpectedly, ATS targeting did not increase liposomal uptake in adipose relative to other tissues, but did increase uptake in the kidneys. Targeting also did not significantly alter metabolic parameters. Analysis of the liposome cellular distribution in the stromal vascular fraction with flow cytometry revealed high uptake by multiple cell types. Our findings highlight the need for thorough study of in vivo biodistribution when evaluating a targeted therapy.
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Affiliation(s)
- Dustin K. Bauknight
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, United States of America
- Cancer Center, University of Virginia, Charlottesville, VA, United States of America
| | - Victoria Osinski
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, United States of America
- Department of Pathology, University of Virginia, Charlottesville, VA, United States of America
| | - Siva Sai Krishna Dasa
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, United States of America
- Cancer Center, University of Virginia, Charlottesville, VA, United States of America
| | - Anh T. Nguyen
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, United States of America
| | - Melissa A. Marshall
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, United States of America
| | - Julia Hartman
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, United States of America
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, United States of America
| | - Matthew Harms
- Research and Early Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Gavin O’Mahony
- Research and Early Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Jeremie Boucher
- Research and Early Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
- The Lundberg Laboratory for Diabetes Research, University of Gothenburg, Gothenburg, Sweden
- Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Alexander L. Klibanov
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, United States of America
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, United States of America
- Department of Medicine, Division of Cardiovascular Medicine, University of Virginia, Charlottesville, VA, United States of America
| | - Coleen A. McNamara
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, United States of America
- Department of Medicine, Division of Cardiovascular Medicine, University of Virginia, Charlottesville, VA, United States of America
| | - Kimberly A. Kelly
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, United States of America
- Cancer Center, University of Virginia, Charlottesville, VA, United States of America
- * E-mail:
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20
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Can obesity-induced inflammation in skeletal muscle and intramuscular adipose tissue accurately detect liver fibrosis? JOURNAL OF MUSCULOSKELETAL & NEURONAL INTERACTIONS 2018; 18:509-524. [PMID: 30511955 PMCID: PMC6313048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
OBJECTIVES Obesity is characterized by a chronic, low grade, systemic inflammation. However, little is known about the role of skeletal muscle, which represents an active metabolic organ whose activities need to be determined. The purpose of our study was to detect relationships between skeletal muscle and adipose tissue inflammation with nonalcoholic fatty liver disease (NAFLD) and diabetes, as well as to explore associations with clinicopathological parameters. METHODS Our study population consisted of 50 morbidly obese patients undergoing planned bariatric surgery. Biopsies were taken from visceral adipose tissue (VAT), subcutaneous adipose tissue (SAT), skeletal muscle (SM), extramyocellular adipose tissue (EMAT) and liver. The expression of CD68 and CD3 was assessed by immunohistochemistry. RESULTS Our findings suggest a complex inter- and intra-tissue co-expression network that links obesity-induced inflammation in adipose depots and skeletal muscle with NAFLD. A novel finding is the intricate cross-talk between SM, EMAT and the liver and the probable correlation between SM, EMAT inflammation and the presence of liver fibrosis. CONCLUSIONS Although the mechanisms of obesity-induced inflammation and its association with NAFLD and liver fibrosis are incompletely understood, our findings indicate an extensive and complex tissue network that needs to be further investigated.
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21
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Unamuno X, Gómez-Ambrosi J, Rodríguez A, Becerril S, Frühbeck G, Catalán V. Adipokine dysregulation and adipose tissue inflammation in human obesity. Eur J Clin Invest 2018; 48:e12997. [PMID: 29995306 DOI: 10.1111/eci.12997] [Citation(s) in RCA: 349] [Impact Index Per Article: 58.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 07/10/2018] [Indexed: 12/13/2022]
Abstract
Obesity, a worldwide epidemic, confers increased risk for multiple serious conditions, including type 2 diabetes, cardiovascular diseases, nonalcoholic fatty liver disease and cancer. Adipose tissue is considered one of the largest endocrine organs in the body as well as an active tissue for cellular reactions and metabolic homeostasis rather than an inert tissue for energy storage. The functional pleiotropism of adipose tissue relies on its ability to synthesize and release a large number of hormones, cytokines, extracellular matrix proteins and growth and vasoactive factors, collectively termed adipokines that influence a variety of physiological and pathophysiological processes. In the obese state, excessive visceral fat accumulation causes adipose tissue dysfunctionality that strongly contributes to the onset of obesity-related comorbidities. The mechanisms underlying adipose tissue dysfunction include adipocyte hypertrophy and hyperplasia, increased inflammation, impaired extracellular matrix remodelling and fibrosis together with an altered secretion of adipokines. This review describes how adipose tissue becomes inflamed in obesity and summarizes key players and molecular mechanisms involved in adipose inflammation.
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Affiliation(s)
- Xabier Unamuno
- Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Pamplona, Spain
| | - Javier Gómez-Ambrosi
- Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Pamplona, Spain.,Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain
| | - Amaia Rodríguez
- Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Pamplona, Spain.,Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain
| | - Sara Becerril
- Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Pamplona, Spain.,Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain
| | - Gema Frühbeck
- Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Pamplona, Spain.,Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain.,Department of Endocrinology & Nutrition, Clínica Universidad de Navarra, Pamplona, Spain
| | - Victoria Catalán
- Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Pamplona, Spain.,Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain
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22
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Šimják P, Cinkajzlová A, Anderlová K, Pařízek A, Mráz M, Kršek M, Haluzík M. The role of obesity and adipose tissue dysfunction in gestational diabetes mellitus. J Endocrinol 2018; 238:R63-R77. [PMID: 29743342 DOI: 10.1530/joe-18-0032] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 05/08/2018] [Indexed: 12/15/2022]
Abstract
Gestational diabetes mellitus is defined as diabetes diagnosed in the second or third trimester of pregnancy in patients with no history of diabetes prior to gestation. It is the most common complication of pregnancy. The underlying pathophysiology shares some common features with type 2 diabetes mellitus (T2DM) combining relatively insufficient insulin secretion with increased peripheral insulin resistance. While a certain degree of insulin resistance is the physiological characteristics of the second half of pregnancy, it is significantly more pronounced in patients with gestational diabetes. Adipose tissue dysfunction and subclinical inflammation in obesity are well-described causes of increased insulin resistance in non-pregnant subjects and are often observed in individuals with T2DM. Emerging evidence of altered adipokine expression and local inflammation in adipose tissue in patients with gestational diabetes suggests an important involvement of adipose tissue in its etiopathogenesis. This review aims to summarize current knowledge of adipose tissue dysfunction and its role in the development of gestational diabetes. We specifically focus on the significance of alterations of adipokines and immunocompetent cells number and phenotype in fat. Detailed understanding of the role of adipose tissue in gestational diabetes may provide new insights into its pathophysiology and open new possibilities of its prevention and treatment.
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Affiliation(s)
- Patrik Šimják
- Department of Gynaecology and Obstetrics, First Faculty of Medicine, Charles University and General University Hospital, Prague, Czech Republic
| | - Anna Cinkajzlová
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University and General University Hospital, Prague, Czech Republic
- Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Kateřina Anderlová
- Department of Gynaecology and Obstetrics, First Faculty of Medicine, Charles University and General University Hospital, Prague, Czech Republic
- 3rd Department of Medicine, First Faculty of Medicine, Charles University and General University Hospital, Prague, Czech Republic
| | - Antonín Pařízek
- Department of Gynaecology and Obstetrics, First Faculty of Medicine, Charles University and General University Hospital, Prague, Czech Republic
| | - Miloš Mráz
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University and General University Hospital, Prague, Czech Republic
- Diabetes Centre, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Michal Kršek
- 3rd Department of Medicine, First Faculty of Medicine, Charles University and General University Hospital, Prague, Czech Republic
- 2nd Internal Department, 3rd Faculty of Medicine, Charles University and University Hospital Královské Vinohrady, Prague, Czech Republic
| | - Martin Haluzík
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University and General University Hospital, Prague, Czech Republic
- Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
- Diabetes Centre, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
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23
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Adipose tissue inflammation and metabolic syndrome. The proactive role of probiotics. Eur J Nutr 2018; 58:27-43. [PMID: 30043184 DOI: 10.1007/s00394-018-1790-2] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 07/17/2018] [Indexed: 12/19/2022]
Abstract
PURPOSE The first part of this review focuses on the role of cells and molecules of adipose tissue involved in metabolic syndrome-induced inflammation and in the maintenance of this pathology. In the second part of the review, the potential role of probiotics-modulating metabolic syndrome-related inflammatory components is summarized and discussed. METHODS The search for the current scientific literature was carried out using ScienceDirect, PubMed, and Google Scholar search engines. The keywords used were: metabolic syndrome, obesity, insulin resistant, adipose tissue, adipose tissue inflammation, chronic low-grade inflammation, immune cells, adipokines, cytokines, probiotics, and gut microbiota. RESULTS AND CONCLUSIONS Chronic low-grade inflammation that characterized metabolic syndrome can contribute to the development of the metabolic dysfunctions involved in the pathogenesis of its comorbidities. Adipose tissue is a complex organ that performs metabolic and immune functions. During metabolic syndrome, an imbalance in the inflammatory components of adipose tissue (immune cells, cytokines, and adipocytokines), which shift from an anti-inflammatory to a pro-inflammatory profile, can provoke metabolic syndrome linked complications. Further knowledge concerning the immune function of adipose tissue may contribute to finding better alternatives for the treatment or prevention of such disorders. The control of inflammation could result in the management of many of the pathologies related to metabolic syndrome. Due to the strong evidence that gut microbiota composition plays a role modulating the body weight, adipose tissue, and the prevalence of a low-grade inflammatory status, probiotics emerge as valuable tools for the prevention of metabolic syndrome and health recovery.
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24
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Carter S, Miard S, Caron A, Sallé-Lefort S, St-Pierre P, Anhê FF, Lavoie-Charland E, Blais-Lecours P, Drolet MC, Lefebvre JS, Lacombe J, Deshaies Y, Couet J, Laplante M, Ferron M, Bossé Y, Marette A, Richard D, Marsolais D, Picard F. Loss of OcaB Prevents Age-Induced Fat Accretion and Insulin Resistance by Altering B-Lymphocyte Transition and Promoting Energy Expenditure. Diabetes 2018; 67:1285-1296. [PMID: 29496744 DOI: 10.2337/db17-0558] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 02/19/2018] [Indexed: 11/13/2022]
Abstract
The current demographic shift toward an aging population has led to a robust increase in the prevalence of age-associated metabolic disorders. Recent studies have demonstrated that the etiology of obesity-related insulin resistance that develops with aging differs from that induced by high-calorie diets. Whereas the role of adaptive immunity in changes in energy metabolism driven by nutritional challenges has recently gained attention, its impact on aging remains mostly unknown. Here we found that the number of follicular B2 lymphocytes and expression of the B-cell-specific transcriptional coactivator OcaB increase with age in spleen and in intra-abdominal epididymal white adipose tissue (eWAT), concomitantly with higher circulating levels of IgG and impaired glucose homeostasis. Reduction of B-cell maturation and Ig production-especially that of IgG2c-by ablation of OcaB prevented age-induced glucose intolerance and insulin resistance and promoted energy expenditure by stimulating fatty acid utilization in eWAT and brown adipose tissue. Transfer of wild-type bone marrow in OcaB-/- mice replenished the eWAT B2-cell population and IgG levels, which diminished glucose tolerance, insulin sensitivity, and energy expenditure while increasing body weight gain in aged mice. Thus these findings demonstrate that upon aging, modifications in B-cell-driven adaptive immunity contribute to glucose intolerance and fat accretion.
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Affiliation(s)
- Sophie Carter
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Québec, QC, Canada
- Faculty of Pharmacy, Université Laval, Québec, QC, Canada
| | - Stéphanie Miard
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Québec, QC, Canada
| | - Alexandre Caron
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Québec, QC, Canada
- Department of Medicine, Faculty of Medicine, Université Laval, Québec, QC, Canada
| | - Sandrine Sallé-Lefort
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Québec, QC, Canada
- Faculty of Pharmacy, Université Laval, Québec, QC, Canada
| | - Philippe St-Pierre
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Québec, QC, Canada
- Institute for Nutrition and Functional Foods, Québec, QC, Canada
| | - Fernando Forato Anhê
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Québec, QC, Canada
- Institute for Nutrition and Functional Foods, Québec, QC, Canada
| | - Emilie Lavoie-Charland
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Québec, QC, Canada
- Department of Molecular Medicine, Faculty of Medicine, Université Laval, Québec, QC, Canada
| | - Pascale Blais-Lecours
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Québec, QC, Canada
- Department of Medicine, Faculty of Medicine, Université Laval, Québec, QC, Canada
| | - Marie-Claude Drolet
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Québec, QC, Canada
| | - Julie S Lefebvre
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Québec, QC, Canada
| | - Julie Lacombe
- Integrative and Molecular Physiology Research Unit, Institut de recherches cliniques de Montréal, Montréal, QC, Canada
| | - Yves Deshaies
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Québec, QC, Canada
- Department of Medicine, Faculty of Medicine, Université Laval, Québec, QC, Canada
| | - Jacques Couet
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Québec, QC, Canada
- Department of Medicine, Faculty of Medicine, Université Laval, Québec, QC, Canada
| | - Mathieu Laplante
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Québec, QC, Canada
- Department of Medicine, Faculty of Medicine, Université Laval, Québec, QC, Canada
| | - Mathieu Ferron
- Integrative and Molecular Physiology Research Unit, Institut de recherches cliniques de Montréal, Montréal, QC, Canada
- Department of Medicine and Biochemistry, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Yohan Bossé
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Québec, QC, Canada
- Department of Molecular Medicine, Faculty of Medicine, Université Laval, Québec, QC, Canada
| | - André Marette
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Québec, QC, Canada
- Department of Medicine, Faculty of Medicine, Université Laval, Québec, QC, Canada
- Institute for Nutrition and Functional Foods, Québec, QC, Canada
| | - Denis Richard
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Québec, QC, Canada
- Department of Medicine, Faculty of Medicine, Université Laval, Québec, QC, Canada
| | - David Marsolais
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Québec, QC, Canada
- Department of Medicine, Faculty of Medicine, Université Laval, Québec, QC, Canada
| | - Frédéric Picard
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Québec, QC, Canada
- Faculty of Pharmacy, Université Laval, Québec, QC, Canada
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Trim W, Turner JE, Thompson D. Parallels in Immunometabolic Adipose Tissue Dysfunction with Ageing and Obesity. Front Immunol 2018; 9:169. [PMID: 29479350 PMCID: PMC5811473 DOI: 10.3389/fimmu.2018.00169] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 01/19/2018] [Indexed: 12/12/2022] Open
Abstract
Ageing, like obesity, is often associated with alterations in metabolic and inflammatory processes resulting in morbidity from diseases characterised by poor metabolic control, insulin insensitivity, and inflammation. Ageing populations also exhibit a decline in immune competence referred to as immunosenescence, which contributes to, or might be driven by chronic, low-grade inflammation termed "inflammageing". In recent years, animal and human studies have started to uncover a role for immune cells within the stromal fraction of adipose tissue in driving the health complications that come with obesity, but relatively little work has been conducted in the context of immunometabolic adipose function in ageing. It is now clear that aberrant immune function within adipose tissue in obesity-including an accumulation of pro-inflammatory immune cell populations-plays a major role in the development of systemic chronic, low-grade inflammation, and limiting the function of adipocytes leading to an impaired fat handling capacity. As a consequence, these changes increase the chance of multiorgan dysfunction and disease onset. Considering the important role of the immune system in obesity-associated metabolic and inflammatory diseases, it is critically important to further understand the interplay between immunological processes and adipose tissue function, establishing whether this interaction contributes to age-associated immunometabolic dysfunction and inflammation. Therefore, the aim of this article is to summarise how the interaction between adipose tissue and the immune system changes with ageing, likely contributing to the age-associated increase in inflammatory activity and loss of metabolic control. To understand the potential mechanisms involved, parallels will be drawn to the current knowledge derived from investigations in obesity. We also highlight gaps in research and propose potential future directions based on the current evidence.
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Affiliation(s)
- William Trim
- Department for Health, University of Bath, Bath, United Kingdom
| | - James E Turner
- Department for Health, University of Bath, Bath, United Kingdom
| | - Dylan Thompson
- Department for Health, University of Bath, Bath, United Kingdom
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Integrated Immunomodulatory Mechanisms through which Long-Chain n-3 Polyunsaturated Fatty Acids Attenuate Obese Adipose Tissue Dysfunction. Nutrients 2017; 9:nu9121289. [PMID: 29186929 PMCID: PMC5748740 DOI: 10.3390/nu9121289] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 11/14/2017] [Accepted: 11/16/2017] [Indexed: 12/13/2022] Open
Abstract
Obesity is a global health concern with rising prevalence that increases the risk of developing other chronic diseases. A causal link connecting overnutrition, the development of obesity and obesity-associated co-morbidities is visceral adipose tissue (AT) dysfunction, characterized by changes in the cellularity of various immune cell populations, altered production of inflammatory adipokines that sustain a chronic state of low-grade inflammation and, ultimately, dysregulated AT metabolic function. Therefore, dietary intervention strategies aimed to halt the progression of obese AT dysfunction through any of the aforementioned processes represent an important active area of research. In this connection, fish oil-derived dietary long-chain n-3 polyunsaturated fatty acids (PUFA) in the form of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) have been demonstrated to attenuate obese AT dysfunction through multiple mechanisms, ultimately affecting AT immune cellularity and function, adipokine production, and metabolic signaling pathways, all of which will be discussed herein.
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Bharath LP, Ip BC, Nikolajczyk BS. Adaptive Immunity and Metabolic Health: Harmony Becomes Dissonant in Obesity and Aging. Compr Physiol 2017; 7:1307-1337. [PMID: 28915326 DOI: 10.1002/cphy.c160042] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Adipose tissue (AT) is the primary energy reservoir organ, and thereby plays a critical role in energy homeostasis and regulation of metabolism. AT expands in response to chronic overnutrition or aging and becomes a major source of inflammation that has marked influence on systemic metabolism. The chronic, sterile inflammation that occurs in the AT during the development of obesity or in aging contributes to onset of devastating diseases such as insulin resistance, diabetes, and cardiovascular pathologies. Numerous studies have shown that inflammation in the visceral AT of humans and animals is a critical trigger for the development of metabolic syndrome. This work underscores the well-supported conclusion that the inflammatory immune response and metabolic pathways in the AT are tightly interwoven by multiple layers of relatively conserved mechanisms. During the development of diet-induced obesity or age-associated adiposity, cells of the innate and the adaptive immune systems infiltrate and proliferate in the AT. Macrophages, which dominate AT-associated immune cells in mouse models of obesity, but are less dominant in obese people, have been studied extensively. However, cells of the adaptive immune system, including T cells and B cells, contribute significantly to AT inflammation, perhaps more in humans than in mice. Lymphocytes regulate recruitment of innate immune cells into AT, and produce cytokines that influence the helpful-to-harmful inflammatory balance that, in turn, regulates organismal metabolism. This review describes inflammation, or more precisely, metabolic inflammation (metaflammation) with an eye toward the AT and the roles lymphocytes play in regulation of systemic metabolism during obesity and aging. © 2017 American Physiological Society. Compr Physiol 7:1307-1337, 2017.
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Affiliation(s)
- Leena P Bharath
- Department of Microbiology, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Blanche C Ip
- Department of Microbiology, Boston University School of Medicine, Boston, Massachusetts, USA.,Department of Molecular Pharmacology, Physiology and Biotechnology, Center of Biomedical Engineering, Brown University, Providence, Rhode Island, USA
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28
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Macrophage JAK2 deficiency protects against high-fat diet-induced inflammation. Sci Rep 2017; 7:7653. [PMID: 28794431 PMCID: PMC5550513 DOI: 10.1038/s41598-017-07923-0] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 07/03/2017] [Indexed: 02/06/2023] Open
Abstract
During obesity, macrophages can infiltrate metabolic tissues, and contribute to chronic low-grade inflammation, and mediate insulin resistance and diabetes. Recent studies have elucidated the metabolic role of JAK2, a key mediator downstream of various cytokines and growth factors. Our study addresses the essential role of macrophage JAK2 in the pathogenesis to obesity-associated inflammation and insulin resistance. During high-fat diet (HFD) feeding, macrophage-specific JAK2 knockout (M-JAK2−/−) mice gained less body weight compared to wildtype littermate control (M-JAK2+/+) mice and were protected from HFD-induced systemic insulin resistance. Histological analysis revealed smaller adipocytes and qPCR analysis showed upregulated expression of some adipogenesis markers in visceral adipose tissue (VAT) of HFD-fed M-JAK2−/− mice. There were decreased crown-like structures in VAT along with reduced mRNA expression of some macrophage markers and chemokines in liver and VAT of HFD-fed M-JAK2−/− mice. Peritoneal macrophages from M-JAK2−/− mice and Jak2 knockdown in macrophage cell line RAW 264.7 also showed lower levels of chemokine expression and reduced phosphorylated STAT3. However, leptin-dependent effects on augmenting chemokine expression in RAW 264.7 cells did not require JAK2. Collectively, our findings show that macrophage JAK2 deficiency improves systemic insulin sensitivity and reduces inflammation in VAT and liver in response to metabolic stress.
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29
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Abstract
Interactions between macrophages and adipocytes influence both metabolism and inflammation. Obesity-induced changes to macrophages and adipocytes lead to chronic inflammation and insulin resistance. This paper reviews the various functions of macrophages in lean and obese adipose tissue and how obesity alters adipose tissue macrophage phenotypes. Metabolic disease and insulin resistance shift the balance between numerous pro- and anti-inflammatory regulators of macrophages and create a feed-forward loop of increasing inflammatory macrophage activation and worsening adipocyte dysfunction. This ultimately leads to adipose tissue fibrosis and diabetes. The molecular mechanisms underlying these processes have therapeutic implications for obesity, metabolic syndrome, and diabetes.
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Affiliation(s)
- Dylan Thomas
- Section of Endocrinology, Diabetes, Nutrition and Weight Management, Boston Medical Center, 88 East Newton Street, H-3600, Boston, MA 02118.
| | - Caroline Apovian
- Section of Endocrinology, Diabetes, Nutrition and Weight Management, Boston Medical Center, 88 East Newton Street, Robinson 4400, Boston, MA 02118.
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30
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Cinkajzlová A, Mráz M, Haluzík M. Lymphocytes and macrophages in adipose tissue in obesity: markers or makers of subclinical inflammation? PROTOPLASMA 2017; 254:1219-1232. [PMID: 28150048 DOI: 10.1007/s00709-017-1082-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 01/25/2017] [Indexed: 05/17/2023]
Abstract
Obesity is accompanied by the development of chronic low-grade inflammation in adipose tissue. The presence of chronic inflammatory response along with metabolically harmful factors released by adipose tissue into the circulation is associated with several metabolic complications of obesity such as type 2 diabetes mellitus or accelerated atherosclerosis. The present review is focused on macrophages and lymphocytes and their possible role in low-grade inflammation in fat. Both macrophages and lymphocytes respond to obesity-induced adipocyte hypertrophy by their migration into adipose tissue. After activation and differentiation, they contribute to the development of local inflammatory response and modulation of endocrine function of adipose tissue. Despite intensive research, the exact role of lymphocytes and macrophages within adipose tissue is only partially clarified and various data obtained by different approaches bring ambiguous information with respect to their polarization and cytokine production. Compared to immunocompetent cells, the role of adipocytes in the obesity-related adipose tissue inflammation is often underestimated despite their abundant production of factors with immunomodulatory actions such as cytokines or adipokines such as leptin, adiponektin, and others. In summary, conflicting evidence together with only partial correlation of in vitro findings with true in vivo situation due to great heterogeneity and molecular complexity of tissue environment calls for intensive research in this rapidly evolving and important area.
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Affiliation(s)
- Anna Cinkajzlová
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
- Centre of Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Miloš Mráz
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
- Diabetes Centre, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Martin Haluzík
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic.
- Centre of Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic.
- Diabetes Centre, Institute for Clinical and Experimental Medicine, Prague, Czech Republic.
- Department of Obesitology, Institute of Endocrinology, Prague, Czech Republic.
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31
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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: 288] [Impact Index Per Article: 41.1] [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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32
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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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Nicholas DA, Andrieu G, Strissel KJ, Nikolajczyk BS, Denis GV. BET bromodomain proteins and epigenetic regulation of inflammation: implications for type 2 diabetes and breast cancer. Cell Mol Life Sci 2017; 74:231-243. [PMID: 27491296 PMCID: PMC5222701 DOI: 10.1007/s00018-016-2320-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 07/16/2016] [Accepted: 07/29/2016] [Indexed: 12/18/2022]
Abstract
Chronic inflammation drives pathologies associated with type 2 diabetes (T2D) and breast cancer. Obesity-driven inflammation may explain increased risk and mortality of breast cancer with T2D reported in the epidemiology literature. Therapeutic approaches to target inflammation in both T2D and cancer have so far fallen short of the expected improvements in disease pathogenesis or outcomes. The targeting of epigenetic regulators of cytokine transcription and cytokine signaling offers one promising, untapped approach to treating diseases driven by inflammation. Recent work has deeply implicated the Bromodomain and Extra-Terminal domain (BET) proteins, which are acetylated histone "readers", in epigenetic regulation of inflammation. This review focuses on inflammation associated with T2D and breast cancer, and the possibility of targeting BET proteins as an approach to regulating inflammation in the clinic. Understanding inflammation in the context of BET protein regulation may provide a basis for designing promising therapeutics for T2D and breast cancer.
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Affiliation(s)
- Dequina A Nicholas
- Cancer Center, Boston University School of Medicine, 72 East Concord Street, Room K520, Boston, MA, 02118, USA
- Department of Microbiology, Training Program in Inflammatory Disorders, 72 East Concord Street, K520, Boston, MA, 02118, USA
| | - Guillaume Andrieu
- Cancer Center, Boston University School of Medicine, 72 East Concord Street, Room K520, Boston, MA, 02118, USA
| | - Katherine J Strissel
- Cancer Center, Boston University School of Medicine, 72 East Concord Street, Room K520, Boston, MA, 02118, USA
| | - Barbara S Nikolajczyk
- Department of Microbiology, Training Program in Inflammatory Disorders, 72 East Concord Street, K520, Boston, MA, 02118, USA
| | - Gerald V Denis
- Cancer Center, Boston University School of Medicine, 72 East Concord Street, Room K520, Boston, MA, 02118, USA.
- Section of Hematology/Oncology, Department of Pharmacology and Experimental Therapeutics, Boston University School of Medicine, 72 East Concord Street, K520, Boston, MA, 02118, USA.
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Harmon DB, Srikakulapu P, Kaplan JL, Oldham SN, McSkimming C, Garmey JC, Perry HM, Kirby JL, Prohaska TA, Gonen A, Hallowell P, Schirmer B, Tsimikas S, Taylor AM, Witztum JL, McNamara CA. Protective Role for B-1b B Cells and IgM in Obesity-Associated Inflammation, Glucose Intolerance, and Insulin Resistance. Arterioscler Thromb Vasc Biol 2016; 36:682-91. [PMID: 26868208 DOI: 10.1161/atvbaha.116.307166] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Accepted: 02/01/2016] [Indexed: 02/04/2023]
Abstract
OBJECTIVE Little is known about the role(s) B cells play in obesity-induced metabolic dysfunction. This study used a mouse with B-cell-specific deletion of Id3 (Id3(Bcell KO)) to identify B-cell functions involved in the metabolic consequences of obesity. APPROACH AND RESULTS Diet-induced obese Id3(Bcell KO) mice demonstrated attenuated inflammation and insulin resistance in visceral adipose tissue (VAT), and improved systemic glucose tolerance. VAT in Id3(Bcell KO) mice had increased B-1b B cells and elevated IgM natural antibodies to oxidation-specific epitopes. B-1b B cells reduced cytokine production in VAT M1 macrophages, and adoptively transferred B-1b B cells trafficked to VAT and produced natural antibodies for the duration of 13-week studies. B-1b B cells null for Id3 demonstrated increased proliferation, established larger populations in Rag1(-/-) VAT, and attenuated diet-induced glucose intolerance and VAT insulin resistance in Rag1(-/-) hosts. However, transfer of B-1b B cells unable to secrete IgM had no effect on glucose tolerance. In an obese human population, results provided the first evidence that B-1 cells are enriched in human VAT and IgM antibodies to oxidation-specific epitopes inversely correlated with inflammation and insulin resistance. CONCLUSIONS NAb-producing B-1b B cells are increased in Id3(Bcell KO) mice and attenuate adipose tissue inflammation and glucose intolerance in diet-induced obese mice. Additional findings are the first to identify VAT as a reservoir for human B-1 cells and to link anti-inflammatory IgM antibodies with reduced inflammation and improved metabolic phenotype in obese humans.
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Affiliation(s)
- Daniel B Harmon
- From the Cardiovascular Research Center (D.B.H., P.S., J.L.K., S.N.O., C.M.S., J.C.G., H.M.P., C.A.M.), Department of Biochemistry, Molecular Biology, and Genetics (D.B.H.), Division of Cardiovascular Medicine, Department of Medicine (P.S., A.M.T., C.A.M.), Department of Pathology (J.L.K., H.M.P.), Division of Endocrinology and Metabolism, Department of Medicine (J.L.K.), Department of Surgery (P.H., B.S.), Beirne B. Carter Center for Immunology Research (C.A.M.), Department of Molecular Physiology and Biological Physics (C.A.M.), University of Virginia, Charlottesville; and Department of Medicine, University of California San Diego, La Jolla (T.A.P., A.G., S.T., J.L.W.)
| | - Prasad Srikakulapu
- From the Cardiovascular Research Center (D.B.H., P.S., J.L.K., S.N.O., C.M.S., J.C.G., H.M.P., C.A.M.), Department of Biochemistry, Molecular Biology, and Genetics (D.B.H.), Division of Cardiovascular Medicine, Department of Medicine (P.S., A.M.T., C.A.M.), Department of Pathology (J.L.K., H.M.P.), Division of Endocrinology and Metabolism, Department of Medicine (J.L.K.), Department of Surgery (P.H., B.S.), Beirne B. Carter Center for Immunology Research (C.A.M.), Department of Molecular Physiology and Biological Physics (C.A.M.), University of Virginia, Charlottesville; and Department of Medicine, University of California San Diego, La Jolla (T.A.P., A.G., S.T., J.L.W.)
| | - Jennifer L Kaplan
- From the Cardiovascular Research Center (D.B.H., P.S., J.L.K., S.N.O., C.M.S., J.C.G., H.M.P., C.A.M.), Department of Biochemistry, Molecular Biology, and Genetics (D.B.H.), Division of Cardiovascular Medicine, Department of Medicine (P.S., A.M.T., C.A.M.), Department of Pathology (J.L.K., H.M.P.), Division of Endocrinology and Metabolism, Department of Medicine (J.L.K.), Department of Surgery (P.H., B.S.), Beirne B. Carter Center for Immunology Research (C.A.M.), Department of Molecular Physiology and Biological Physics (C.A.M.), University of Virginia, Charlottesville; and Department of Medicine, University of California San Diego, La Jolla (T.A.P., A.G., S.T., J.L.W.)
| | - Stephanie N Oldham
- From the Cardiovascular Research Center (D.B.H., P.S., J.L.K., S.N.O., C.M.S., J.C.G., H.M.P., C.A.M.), Department of Biochemistry, Molecular Biology, and Genetics (D.B.H.), Division of Cardiovascular Medicine, Department of Medicine (P.S., A.M.T., C.A.M.), Department of Pathology (J.L.K., H.M.P.), Division of Endocrinology and Metabolism, Department of Medicine (J.L.K.), Department of Surgery (P.H., B.S.), Beirne B. Carter Center for Immunology Research (C.A.M.), Department of Molecular Physiology and Biological Physics (C.A.M.), University of Virginia, Charlottesville; and Department of Medicine, University of California San Diego, La Jolla (T.A.P., A.G., S.T., J.L.W.)
| | - Chantel McSkimming
- From the Cardiovascular Research Center (D.B.H., P.S., J.L.K., S.N.O., C.M.S., J.C.G., H.M.P., C.A.M.), Department of Biochemistry, Molecular Biology, and Genetics (D.B.H.), Division of Cardiovascular Medicine, Department of Medicine (P.S., A.M.T., C.A.M.), Department of Pathology (J.L.K., H.M.P.), Division of Endocrinology and Metabolism, Department of Medicine (J.L.K.), Department of Surgery (P.H., B.S.), Beirne B. Carter Center for Immunology Research (C.A.M.), Department of Molecular Physiology and Biological Physics (C.A.M.), University of Virginia, Charlottesville; and Department of Medicine, University of California San Diego, La Jolla (T.A.P., A.G., S.T., J.L.W.)
| | - James C Garmey
- From the Cardiovascular Research Center (D.B.H., P.S., J.L.K., S.N.O., C.M.S., J.C.G., H.M.P., C.A.M.), Department of Biochemistry, Molecular Biology, and Genetics (D.B.H.), Division of Cardiovascular Medicine, Department of Medicine (P.S., A.M.T., C.A.M.), Department of Pathology (J.L.K., H.M.P.), Division of Endocrinology and Metabolism, Department of Medicine (J.L.K.), Department of Surgery (P.H., B.S.), Beirne B. Carter Center for Immunology Research (C.A.M.), Department of Molecular Physiology and Biological Physics (C.A.M.), University of Virginia, Charlottesville; and Department of Medicine, University of California San Diego, La Jolla (T.A.P., A.G., S.T., J.L.W.)
| | - Heather M Perry
- From the Cardiovascular Research Center (D.B.H., P.S., J.L.K., S.N.O., C.M.S., J.C.G., H.M.P., C.A.M.), Department of Biochemistry, Molecular Biology, and Genetics (D.B.H.), Division of Cardiovascular Medicine, Department of Medicine (P.S., A.M.T., C.A.M.), Department of Pathology (J.L.K., H.M.P.), Division of Endocrinology and Metabolism, Department of Medicine (J.L.K.), Department of Surgery (P.H., B.S.), Beirne B. Carter Center for Immunology Research (C.A.M.), Department of Molecular Physiology and Biological Physics (C.A.M.), University of Virginia, Charlottesville; and Department of Medicine, University of California San Diego, La Jolla (T.A.P., A.G., S.T., J.L.W.)
| | - Jennifer L Kirby
- From the Cardiovascular Research Center (D.B.H., P.S., J.L.K., S.N.O., C.M.S., J.C.G., H.M.P., C.A.M.), Department of Biochemistry, Molecular Biology, and Genetics (D.B.H.), Division of Cardiovascular Medicine, Department of Medicine (P.S., A.M.T., C.A.M.), Department of Pathology (J.L.K., H.M.P.), Division of Endocrinology and Metabolism, Department of Medicine (J.L.K.), Department of Surgery (P.H., B.S.), Beirne B. Carter Center for Immunology Research (C.A.M.), Department of Molecular Physiology and Biological Physics (C.A.M.), University of Virginia, Charlottesville; and Department of Medicine, University of California San Diego, La Jolla (T.A.P., A.G., S.T., J.L.W.)
| | - Thomas A Prohaska
- From the Cardiovascular Research Center (D.B.H., P.S., J.L.K., S.N.O., C.M.S., J.C.G., H.M.P., C.A.M.), Department of Biochemistry, Molecular Biology, and Genetics (D.B.H.), Division of Cardiovascular Medicine, Department of Medicine (P.S., A.M.T., C.A.M.), Department of Pathology (J.L.K., H.M.P.), Division of Endocrinology and Metabolism, Department of Medicine (J.L.K.), Department of Surgery (P.H., B.S.), Beirne B. Carter Center for Immunology Research (C.A.M.), Department of Molecular Physiology and Biological Physics (C.A.M.), University of Virginia, Charlottesville; and Department of Medicine, University of California San Diego, La Jolla (T.A.P., A.G., S.T., J.L.W.)
| | - Ayelet Gonen
- From the Cardiovascular Research Center (D.B.H., P.S., J.L.K., S.N.O., C.M.S., J.C.G., H.M.P., C.A.M.), Department of Biochemistry, Molecular Biology, and Genetics (D.B.H.), Division of Cardiovascular Medicine, Department of Medicine (P.S., A.M.T., C.A.M.), Department of Pathology (J.L.K., H.M.P.), Division of Endocrinology and Metabolism, Department of Medicine (J.L.K.), Department of Surgery (P.H., B.S.), Beirne B. Carter Center for Immunology Research (C.A.M.), Department of Molecular Physiology and Biological Physics (C.A.M.), University of Virginia, Charlottesville; and Department of Medicine, University of California San Diego, La Jolla (T.A.P., A.G., S.T., J.L.W.)
| | - Peter Hallowell
- From the Cardiovascular Research Center (D.B.H., P.S., J.L.K., S.N.O., C.M.S., J.C.G., H.M.P., C.A.M.), Department of Biochemistry, Molecular Biology, and Genetics (D.B.H.), Division of Cardiovascular Medicine, Department of Medicine (P.S., A.M.T., C.A.M.), Department of Pathology (J.L.K., H.M.P.), Division of Endocrinology and Metabolism, Department of Medicine (J.L.K.), Department of Surgery (P.H., B.S.), Beirne B. Carter Center for Immunology Research (C.A.M.), Department of Molecular Physiology and Biological Physics (C.A.M.), University of Virginia, Charlottesville; and Department of Medicine, University of California San Diego, La Jolla (T.A.P., A.G., S.T., J.L.W.)
| | - Bruce Schirmer
- From the Cardiovascular Research Center (D.B.H., P.S., J.L.K., S.N.O., C.M.S., J.C.G., H.M.P., C.A.M.), Department of Biochemistry, Molecular Biology, and Genetics (D.B.H.), Division of Cardiovascular Medicine, Department of Medicine (P.S., A.M.T., C.A.M.), Department of Pathology (J.L.K., H.M.P.), Division of Endocrinology and Metabolism, Department of Medicine (J.L.K.), Department of Surgery (P.H., B.S.), Beirne B. Carter Center for Immunology Research (C.A.M.), Department of Molecular Physiology and Biological Physics (C.A.M.), University of Virginia, Charlottesville; and Department of Medicine, University of California San Diego, La Jolla (T.A.P., A.G., S.T., J.L.W.)
| | - Sotirios Tsimikas
- From the Cardiovascular Research Center (D.B.H., P.S., J.L.K., S.N.O., C.M.S., J.C.G., H.M.P., C.A.M.), Department of Biochemistry, Molecular Biology, and Genetics (D.B.H.), Division of Cardiovascular Medicine, Department of Medicine (P.S., A.M.T., C.A.M.), Department of Pathology (J.L.K., H.M.P.), Division of Endocrinology and Metabolism, Department of Medicine (J.L.K.), Department of Surgery (P.H., B.S.), Beirne B. Carter Center for Immunology Research (C.A.M.), Department of Molecular Physiology and Biological Physics (C.A.M.), University of Virginia, Charlottesville; and Department of Medicine, University of California San Diego, La Jolla (T.A.P., A.G., S.T., J.L.W.)
| | - Angela M Taylor
- From the Cardiovascular Research Center (D.B.H., P.S., J.L.K., S.N.O., C.M.S., J.C.G., H.M.P., C.A.M.), Department of Biochemistry, Molecular Biology, and Genetics (D.B.H.), Division of Cardiovascular Medicine, Department of Medicine (P.S., A.M.T., C.A.M.), Department of Pathology (J.L.K., H.M.P.), Division of Endocrinology and Metabolism, Department of Medicine (J.L.K.), Department of Surgery (P.H., B.S.), Beirne B. Carter Center for Immunology Research (C.A.M.), Department of Molecular Physiology and Biological Physics (C.A.M.), University of Virginia, Charlottesville; and Department of Medicine, University of California San Diego, La Jolla (T.A.P., A.G., S.T., J.L.W.)
| | - Joseph L Witztum
- From the Cardiovascular Research Center (D.B.H., P.S., J.L.K., S.N.O., C.M.S., J.C.G., H.M.P., C.A.M.), Department of Biochemistry, Molecular Biology, and Genetics (D.B.H.), Division of Cardiovascular Medicine, Department of Medicine (P.S., A.M.T., C.A.M.), Department of Pathology (J.L.K., H.M.P.), Division of Endocrinology and Metabolism, Department of Medicine (J.L.K.), Department of Surgery (P.H., B.S.), Beirne B. Carter Center for Immunology Research (C.A.M.), Department of Molecular Physiology and Biological Physics (C.A.M.), University of Virginia, Charlottesville; and Department of Medicine, University of California San Diego, La Jolla (T.A.P., A.G., S.T., J.L.W.)
| | - Coleen A McNamara
- From the Cardiovascular Research Center (D.B.H., P.S., J.L.K., S.N.O., C.M.S., J.C.G., H.M.P., C.A.M.), Department of Biochemistry, Molecular Biology, and Genetics (D.B.H.), Division of Cardiovascular Medicine, Department of Medicine (P.S., A.M.T., C.A.M.), Department of Pathology (J.L.K., H.M.P.), Division of Endocrinology and Metabolism, Department of Medicine (J.L.K.), Department of Surgery (P.H., B.S.), Beirne B. Carter Center for Immunology Research (C.A.M.), Department of Molecular Physiology and Biological Physics (C.A.M.), University of Virginia, Charlottesville; and Department of Medicine, University of California San Diego, La Jolla (T.A.P., A.G., S.T., J.L.W.).
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Westover AJ, Johnston KA, Buffington DA, Humes HD. An Immunomodulatory Device Improves Insulin Resistance in Obese Porcine Model of Metabolic Syndrome. J Diabetes Res 2016; 2016:3486727. [PMID: 27819007 PMCID: PMC5081446 DOI: 10.1155/2016/3486727] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 07/31/2016] [Indexed: 01/07/2023] Open
Abstract
Obesity is associated with tissue inflammation which is a crucial etiology of insulin resistance. This inflammation centers around circulating monocytes which form proinflammatory adipose tissue macrophages (ATM). Specific approaches targeting monocytes/ATM may improve insulin resistance without the adverse side effects of generalized immunosuppression. In this regard, a biomimetic membrane leukocyte processing device, called the selective cytopheretic device (SCD), was evaluated in an Ossabaw miniature swine model of insulin resistance with metabolic syndrome. Treatment with the SCD in this porcine model demonstrated a decline in circulating neutrophil activation parameters and monocyte counts. These changes were associated with improvements in insulin resistance as determined with intravenous glucose tolerance testing. These improvements were also reflected in lowering of homeostatic model assessment- (HOMA-) insulin resistant (IR) scores for up to 2 weeks after SCD therapy. These results allow for the planning of first-in-man studies in obese type 2 diabetic patients.
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Affiliation(s)
- Angela J. Westover
- Innovative BioTherapies, Inc., 650 Avis Drive, Suite 300, Ann Arbor, MI 48108, USA
| | - Kimberly A. Johnston
- Innovative BioTherapies, Inc., 650 Avis Drive, Suite 300, Ann Arbor, MI 48108, USA
| | | | - H. David Humes
- Innovative BioTherapies, Inc., 650 Avis Drive, Suite 300, Ann Arbor, MI 48108, USA
- Department of Internal Medicine, University of Michigan Medical School, 4520C MSRB I, SPC 5651, 1150 W. Medical Center Dr., Ann Arbor, MI 48109, USA
- *H. David Humes:
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Dam V, Sikder T, Santosa S. From neutrophils to macrophages: differences in regional adipose tissue depots. Obes Rev 2016; 17:1-17. [PMID: 26667065 DOI: 10.1111/obr.12335] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2015] [Revised: 09/01/2015] [Accepted: 09/23/2015] [Indexed: 12/27/2022]
Abstract
Currently, we do not fully understand the underlying mechanisms of how regional adiposity promotes metabolic dysregulation. As adipose tissue expands, there is an increase in chronic systemic low-grade inflammation due to greater infiltration of immune cells and production of cytokines. This chronic inflammation is thought to play a major role in the development of metabolic complications and disease such as insulin resistance and diabetes. We know that different adipose tissue depots contribute differently to the risk of metabolic disease. People who have an upper body fat distribution around the abdomen are at greater risk of disease than those who tend to store fat in their lower body around the hips and thighs. Thus, it is conceivable that adipose tissue depots contribute differently to the inflammatory milieu as a result of varied infiltration of immune cell types. In this review, we describe the role and function of major resident immune cells in the development of adipose tissue inflammation and discuss their regional differences in the context of metabolic disease risk. We find that although initial studies have found regional differences, a more comprehensive understanding of how immune cells interrupt adipose tissue homeostasis is needed.
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Affiliation(s)
- V Dam
- Department of Exercise Science, Concordia University, Montreal, QC, Canada.,Nutrition, Obesity, and Metabolism Lab, PERFORM Centre, Concordia University, Montreal, QC, Canada
| | - T Sikder
- Department of Exercise Science, Concordia University, Montreal, QC, Canada.,Nutrition, Obesity, and Metabolism Lab, PERFORM Centre, Concordia University, Montreal, QC, Canada
| | - S Santosa
- Department of Exercise Science, Concordia University, Montreal, QC, Canada.,Nutrition, Obesity, and Metabolism Lab, PERFORM Centre, Concordia University, Montreal, QC, Canada
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Adaptive Immunity and Antigen-Specific Activation in Obesity-Associated Insulin Resistance. Mediators Inflamm 2015; 2015:593075. [PMID: 26146464 PMCID: PMC4471324 DOI: 10.1155/2015/593075] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 05/11/2015] [Accepted: 05/13/2015] [Indexed: 02/07/2023] Open
Abstract
Type 2 diabetes mellitus (T2D) is a metabolic disease that is strongly tied to obesity and often preceded by insulin resistance (IR). It has been established that chronic inflammation of hypertrophic adipose tissue depots in obese individuals leads to obesity-associated IR and is mediated by cells of the innate immune system, particularly macrophages. More recently, cells of the adaptive immune system, B and T lymphocytes, have also emerged as important regulators of glucose homeostasis, raising the intriguing possibility that antigen-driven immune responses play a role in disease. In this review, we critically evaluate the roles that various B and T cell subsets play in IR, and then we examine the data suggesting that antigen-driven mechanisms, such as antigen presentation and costimulation, may drive the activity of these lymphocytes.
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Capasso M, Rashed Alyahyawi A, Spear S. Metabolic control of B cells: more questions than answers. Front Immunol 2015; 6:80. [PMID: 25762999 PMCID: PMC4340224 DOI: 10.3389/fimmu.2015.00080] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 02/10/2015] [Indexed: 01/29/2023] Open
Affiliation(s)
- Melania Capasso
- Centre for Cancer and Inflammation, Barts Cancer Institute, Queen Mary University of London , London , UK
| | - Alaa Rashed Alyahyawi
- Centre for Cancer and Inflammation, Barts Cancer Institute, Queen Mary University of London , London , UK
| | - Sarah Spear
- Centre for Cancer and Inflammation, Barts Cancer Institute, Queen Mary University of London , London , UK
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39
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Abstract
Diabetic complications involve inflammation-mediated microvascular and macrovascular damage, disruption of lipid metabolism, glycosylation of proteins, and abnormalities of neutrophil-mediated events. Resolution of inflamed tissues to health and homeostasis is an active process mediated by endogenous lipid agonists, including lipoxins and resolvins. This proresolution system appears to be compromised in type 2 diabetes (T2D). The goal of this study was to investigate unresolved inflammation in T2D. Wild-type (WT) and genetically engineered mice, including T2D mice (db/db), transgenic mice overexpressing the human resolvin E1 (RvE1) receptor (ERV1), and a newly bred strain of db/ERV1 mice, were used to determine the impact of RvE1 on the phagocytosis of Porphyromonas gingivalis in T2D. Neutrophils were isolated and incubated with fluorescein isothiocyanate-labeled P. gingivalis, and phagocytosis was measured in a fluorochrome-based assay by flow cytometry. Mitogen-activated protein kinase (MAPK) (p42 and p44) and Akt (Thr308 and Ser473) phosphorylation was analyzed by Western blotting. The mouse dorsal air pouch model was used to evaluate the in vivo impact of RvE1. Results revealed that RvE1 increased the neutrophil phagocytosis of P. gingivalis in WT animals but had no impact in db/db animals. In ERV1-transgenic and ERV1-transgenic diabetic mice, phagocytosis was significantly increased. RvE1 decreased Akt and MAPK phosphorylation in the transgenic animals. In vivo dorsal air pouch studies revealed that RvE1 decreases neutrophil influx into the pouch and increases neutrophil phagocytosis of P. gingivalis in the transgenic animals; cutaneous fat deposition was reduced, as was macrophage infiltration. The results suggest that RvE1 rescues impaired neutrophil phagocytosis in obese T2D mice overexpressing ERV1.
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40
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Bassols J, Prats-Puig A, Gispert-Saüch M, Crehuet-Almirall M, Carreras-Badosa G, Díaz-Roldán F, Montesinos-Costa M, de Zegher F, Ibáñez L, López-Bermejo A. Increased serum IgG and IgA in overweight children relate to a less favourable metabolic phenotype. Pediatr Obes 2014; 9:232-8. [PMID: 23554403 DOI: 10.1111/j.2047-6310.2013.00160.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 02/05/2013] [Accepted: 02/20/2013] [Indexed: 01/20/2023]
Abstract
BACKGROUND The adaptive immune system has emerged as an unexpected modulator of insulin resistance. B lymphocytes accumulate in adipose tissue and produce pathogenic antibodies that cause insulin resistance. OBJECTIVE We studied whether circulating immunoglobulins (IgG, IgA and IgM) were related to metabolic risk markers in pre-pubertal children with and without overweight. DESIGN AND METHODS Subjects were 270 asymptomatic pre-pubertal Caucasian children (145 lean, 125 overweight) recruited in a primary care setting. Assessments included serum IgG, IgA and IgM concentrations (nephelometry), insulin resistance (HOMA-IR) and fasting lipids (triacylglycerol and high-density lipoprotein [HDL]-cholesterol). RESULTS Overweight children had higher IgG and IgA serum levels than lean children (P ≤ 0.01). Increasing serum IgG and IgA, but not IgM, were associated with a less favourable metabolic phenotype, consisting of higher HOMA-IR and triacylglycerol and lower HDL-cholesterol, particularly in obese children, in whom serum IgG and IgA were both independently associated with HOMA-IR (β = 0.308, P = 0.017, r2 = 9.5% and β = 0.361, P = 0.005, r2 = 13.0%, respectively) and triacylglycerol (β = 0.343, P = 0.006, r2 = 11.1% and β = 0.354, P = 0.003, r2 = 12.2%, respectively). CONCLUSIONS Increased circulating IgG and IgA in overweight children are associated with a less favourable metabolic phenotype, particularly in obese children. These results suggest a relationship between adaptive immunity and insulin resistance in childhood obesity.
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Affiliation(s)
- J Bassols
- Pediatrics, Dr. Josep Trueta Hospital, and Girona Institute for Biomedical Research, Girona, Spain
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Pecht T, Gutman-Tirosh A, Bashan N, Rudich A. Peripheral blood leucocyte subclasses as potential biomarkers of adipose tissue inflammation and obesity subphenotypes in humans. Obes Rev 2014; 15:322-37. [PMID: 24251825 DOI: 10.1111/obr.12133] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2013] [Revised: 10/01/2013] [Accepted: 10/18/2013] [Indexed: 12/14/2022]
Abstract
While obesity is clearly accepted as a major risk factor for cardio-metabolic morbidity, it is also apparent that some obese patients largely escape this association, forming a unique obese subphenotype(s). Current approaches to define such subphenotypes include clinical biomarkers that largely reflect already manifested comorbidities, such as markers of dyslipidaemia, hyperglycaemia and impaired regulation of vascular tone, and anthropometric or imaging-based assessment of adipose tissue distribution. Low-grade inflammation, evident both systemically and within adipose tissue (particularly intra-abdominal fat depots), seems to characterize the more cardio-metabolically morbid forms of obesity. Indeed, several systemic inflammatory markers (C-reactive protein), adipokines (retinol-binding protein 4, adiponectin) and cytokines have been shown to correlate in humans with adipose tissue inflammation and with obesity-associated health risks. Circulating leucocytes constitute a diverse group of cells that form a major arm of the immune system. They are both major sources of cytokines and likely also of infiltrating adipose tissue immune cells in obesity. In the present review, we summarize currently available literature on 'classical' blood white cell classes and on more specific leucocyte subclasses present in the circulation in human obesity. We critically raise the possibility that leucocytes may constitute clinically available markers for the more morbidity-associated obesity subphenotype(s), and when available, for intra-abdominal adipose tissue inflammation.
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Affiliation(s)
- T Pecht
- Department of Clinical Biochemistry and Pharmacology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel; The National Institute of Biotechnology (NIBN) in the Negev, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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Richardson VR, Smith KA, Carter AM. Adipose tissue inflammation: Feeding the development of type 2 diabetes mellitus. Immunobiology 2013; 218:1497-504. [DOI: 10.1016/j.imbio.2013.05.002] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Accepted: 05/07/2013] [Indexed: 01/12/2023]
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Nitta CF, Orlando RA. Crosstalk between immune cells and adipocytes requires both paracrine factors and cell contact to modify cytokine secretion. PLoS One 2013; 8:e77306. [PMID: 24204798 PMCID: PMC3804580 DOI: 10.1371/journal.pone.0077306] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Accepted: 09/08/2013] [Indexed: 12/25/2022] Open
Abstract
Increased adiposity results in a heightened infiltration of immune cells into fat depots, which in turn generates a pro-inflammatory phenotype in obese individuals. To better understand the causal factors that establish this pro-inflammatory profile, we examined events leading to crosstalk between adipocytes and immune cells. Using isolated spleen-derived immune cells, stimulated with LPS, together with cultured adipocytes, we differentiated the effects of paracrine factors and cell-cell contact on TNFα, IL-6 and MCP-1 secretion levels and secretion profiles. When splenocytes and adipocytes were co-cultured without direct contact, permitting only paracrine communication, secretion of IL-6 and MCP-1 were increased by 3- and 2.5-fold, respectively, over what was secreted by individual cultures, whereas TNFα secretion was reduced by 55%. When cells were co-cultured with direct cell-cell contact, IL-6 and MCP-1 secretion were increased by an additional 36% and 38%, respectively, over that measured from just paracrine stimulation alone, indicating that cell contact provides a synergistic signal that amplifies elevated cytokine secretion stimulated by paracrine signals. Using splenocytes from TNFα-/- mice showed that the absence of TNFα has little effect on paracrine stimulation of cytokine secretion, but attenuates cell contact-mediated enhancement of IL-6 and MCP-1 secretion. Furthermore, TNFα supports cell contact-mediated signaling in part, but not exclusively, through Nuclear Factor-κB activation. These findings indicate that engagement of cell contact between immune cells and adipocytes, in conjunction with locally secreted paracrine factors, activates a unique signaling pathway that mediates crosstalk between these cell types leading to marked effects on cytokine secretion and profile.
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Affiliation(s)
- Carolina Franco Nitta
- Department of Biochemistry and Molecular Biology, University of New Mexico, School of Medicine, Albuquerque, New Mexico, United States of America
| | - Robert A. Orlando
- Department of Biochemistry and Molecular Biology, University of New Mexico, School of Medicine, Albuquerque, New Mexico, United States of America
- * E-mail:
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44
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B cells promote inflammation in obesity and type 2 diabetes through regulation of T-cell function and an inflammatory cytokine profile. Proc Natl Acad Sci U S A 2013; 110:5133-8. [PMID: 23479618 DOI: 10.1073/pnas.1215840110] [Citation(s) in RCA: 356] [Impact Index Per Article: 32.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Patients with type 2 diabetes (T2D) have disease-associated changes in B-cell function, but the role these changes play in disease pathogenesis is not well established. Data herein show B cells from obese mice produce a proinflammatory cytokine profile compared with B cells from lean mice. Complementary in vivo studies show that obese B cell-null mice have decreased systemic inflammation, inflammatory B- and T-cell cytokines, adipose tissue inflammation, and insulin resistance (IR) compared with obese WT mice. Reduced inflammation in obese/insulin resistant B cell-null mice associates with an increased percentage of anti-inflammatory regulatory T cells (Tregs). This increase contrasts with the sharply decreased percentage of Tregs in obese compared with lean WT mice and suggests that B cells may be critical regulators of T-cell functions previously shown to play important roles in IR. We demonstrate that B cells from T2D (but not non-T2D) subjects support proinflammatory T-cell function in obesity/T2D through contact-dependent mechanisms. In contrast, human monocytes increase proinflammatory T-cell cytokines in both T2D and non-T2D analyses. These data support the conclusion that B cells are critical regulators of inflammation in T2D due to their direct ability to promote proinflammatory T-cell function and secrete a proinflammatory cytokine profile. Thus, B cells are potential therapeutic targets for T2D.
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45
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Nikolajczyk BS, Jagannathan-Bogdan M, Denis GV. The outliers become a stampede as immunometabolism reaches a tipping point. Immunol Rev 2013; 249:253-75. [PMID: 22889227 DOI: 10.1111/j.1600-065x.2012.01142.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Obesity and Type 2 diabetes mellitus (T2D) are characterized by pro-inflammatory alterations in the immune system including shifts in leukocyte subset differentiation and in cytokine/chemokine balance. The chronic, low-grade inflammation resulting largely from changes in T-cell, B-cell, and myeloid compartments promotes and/or exacerbates insulin resistance (IR) that, together with pancreatic islet failure, defines T2D. Animal model studies show that interruption of immune cell-mediated inflammation by any one of several methods almost invariably results in the prevention or delay of obesity and/or IR. However, anti-inflammatory therapies have had a modest impact on established T2D in clinical trials. These seemingly contradictory results indicate that a more comprehensive understanding of human IR/T2D-associated immune cell function is needed to leverage animal studies into clinical treatments. Important outstanding analyses include identifying potential immunological checkpoints in disease etiology, detailing immune cell/adipose tissue cross-talk, and defining strengths/weaknesses of model organism studies to determine whether we can harness the promising new field of immunometabolism to curb the global obesity and T2D epidemics.
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46
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Wang F, Deeney JT, Denis GV. Brd2 gene disruption causes "metabolically healthy" obesity: epigenetic and chromatin-based mechanisms that uncouple obesity from type 2 diabetes. VITAMINS AND HORMONES 2013; 91:49-75. [PMID: 23374712 DOI: 10.1016/b978-0-12-407766-9.00003-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Disturbed body energy balance can lead to obesity and obesity-driven diseases such as Type 2 diabetes, which have reached an epidemic level. Evidence indicates that obesity-induced inflammation is a major cause of insulin resistance and Type 2 diabetes. Environmental factors, such as nutrients, affect body energy balance through epigenetic or chromatin-based mechanisms. As a bromodomain and external domain family transcription regulator, Brd2 regulates expression of many genes through interpretation of chromatin codes and participates in the regulation of body energy balance and immune function. In the severely obese state, Brd2 knockdown in mice prevented obesity-induced inflammatory responses, protected animals from insulin resistance, glucose intolerance and pancreatic beta cell dysfunction, and thus uncoupled obesity from diabetes. Brd2 provides an important model for investigation of the function of transcription regulators and the development of obesity and diabetes; it also provides a possible, innovative target to treat obesity and diabetes through modulation of the function of a chromatin code reader.
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