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Schempp R, Eilts J, Schöl M, Grijalva Yépez MF, Fekete A, Wigger D, Schumacher F, Kleuser B, van Ham M, Jänsch L, Sauer M, Avota E. The Role of Neutral Sphingomyelinase-2 (NSM2) in the Control of Neutral Lipid Storage in T Cells. Int J Mol Sci 2024; 25:3247. [PMID: 38542220 PMCID: PMC10970209 DOI: 10.3390/ijms25063247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 02/25/2024] [Accepted: 03/08/2024] [Indexed: 04/04/2024] Open
Abstract
The accumulation of lipid droplets (LDs) and ceramides (Cer) is linked to non-alcoholic fatty liver disease (NAFLD), regularly co-existing with type 2 diabetes and decreased immune function. Chronic inflammation and increased disease severity in viral infections are the hallmarks of the obesity-related immunopathology. The upregulation of neutral sphingomyelinase-2 (NSM2) has shown to be associated with the pathology of obesity in tissues. Nevertheless, the role of sphingolipids and specifically of NSM2 in the regulation of immune cell response to a fatty acid (FA) rich environment is poorly studied. Here, we identified the presence of the LD marker protein perilipin 3 (PLIN3) in the intracellular nano-environment of NSM2 using the ascorbate peroxidase APEX2-catalyzed proximity-dependent biotin labeling method. In line with this, super-resolution structured illumination microscopy (SIM) shows NSM2 and PLIN3 co-localization in LD organelles in the presence of increased extracellular concentrations of oleic acid (OA). Furthermore, the association of enzymatically active NSM2 with isolated LDs correlates with increased Cer levels in these lipid storage organelles. NSM2 enzymatic activity is not required for NSM2 association with LDs, but negatively affects the LD numbers and cellular accumulation of long-chain unsaturated triacylglycerol (TAG) species. Concurrently, NSM2 expression promotes mitochondrial respiration and fatty acid oxidation (FAO) in response to increased OA levels, thereby shifting cells to a high energetic state. Importantly, endogenous NSM2 activity is crucial for primary human CD4+ T cell survival and proliferation in a FA rich environment. To conclude, our study shows a novel NSM2 intracellular localization to LDs and the role of enzymatically active NSM2 in metabolic response to enhanced FA concentrations in T cells.
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Affiliation(s)
- Rebekka Schempp
- Institute for Virology and Immunobiology, University of Wuerzburg, 97078 Wuerzburg, Germany; (R.S.); (M.S.); (M.F.G.Y.)
| | - Janna Eilts
- Department of Biotechnology and Biophysics, Biocenter, University of Wuerzburg, 97074 Wuerzburg, Germany; (J.E.); (M.S.)
| | - Marie Schöl
- Institute for Virology and Immunobiology, University of Wuerzburg, 97078 Wuerzburg, Germany; (R.S.); (M.S.); (M.F.G.Y.)
| | - Maria Fernanda Grijalva Yépez
- Institute for Virology and Immunobiology, University of Wuerzburg, 97078 Wuerzburg, Germany; (R.S.); (M.S.); (M.F.G.Y.)
| | - Agnes Fekete
- Pharmaceutical Biology, Julius-von-Sachs-Institute, Biocenter, University of Wuerzburg, 97082 Wuerzburg, Germany;
| | - Dominik Wigger
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Freie Universitaet Berlin, 14195 Berlin, Germany; (D.W.); (F.S.); (B.K.)
| | - Fabian Schumacher
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Freie Universitaet Berlin, 14195 Berlin, Germany; (D.W.); (F.S.); (B.K.)
| | - Burkhard Kleuser
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Freie Universitaet Berlin, 14195 Berlin, Germany; (D.W.); (F.S.); (B.K.)
| | - Marco van Ham
- Cellular Proteome Research Group, Helmholtz Centre for Infection Research, 38124 Braunschweig, Germany; (M.v.H.); (L.J.)
| | - Lothar Jänsch
- Cellular Proteome Research Group, Helmholtz Centre for Infection Research, 38124 Braunschweig, Germany; (M.v.H.); (L.J.)
| | - Markus Sauer
- Department of Biotechnology and Biophysics, Biocenter, University of Wuerzburg, 97074 Wuerzburg, Germany; (J.E.); (M.S.)
| | - Elita Avota
- Institute for Virology and Immunobiology, University of Wuerzburg, 97078 Wuerzburg, Germany; (R.S.); (M.S.); (M.F.G.Y.)
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2
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Guo W, Wu D, Li L, Ding S, Meydani SN. Obesity, rather than high fat diet, exacerbates the outcome of influenza virus infection in influenza-sensitized mice. Front Nutr 2022; 9:1018831. [PMID: 36337627 PMCID: PMC9631825 DOI: 10.3389/fnut.2022.1018831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Accepted: 10/07/2022] [Indexed: 11/21/2022] Open
Abstract
Introduction Obesity is associated with impaired immune function and increased susceptibility to infection. High fat (HF) diet-induced obesity is a commonly used animal model. However, HF diet itself is known to affect immune function and infection. Thus, it is not discernable which one, HF diet or adiposity, is the major contributor to the observed impairment in immunity and susceptibility to infection in HF diet-induced obesity. We hypothesized that obesity is a major contributor to impaired immune function. Methods and results Weight-matched outbred female CD-1 mice (1-mo) were randomly assigned to either a HF (45%) or a low fat (LF, 10%) diet group. Ten week after feeding their respective diets, weight gain in the mice fed the HF diet varied greatly. Thus, based on the average body weight, mice in HF diet group were divided into two sub-groups: HF lean (HF-L) and HF obese (HF-O). After 25-week, mice were immunized with an influenza A/Puerto Rico/8/34 vaccine and boosted 3-week later. Five week after the booster, mice were infected with influenza A/Puerto Rico/8/34 virus, and body weight was recorded daily for 1 month. HF-O mice exhibited significant weight loss after influenza virus challenge compared to LF and HF-L mice while LF and HF-L mice largely maintained their weight to a similar extent. Conclusion Our findings suggest that obesity, rather than HF diet, per se, may impair the efficacy of influenza vaccination.
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Affiliation(s)
- Weimin Guo
- Nutritional Immunology Laboratory, JM USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
- *Correspondence: Weimin Guo,
| | - Dayong Wu
- Nutritional Immunology Laboratory, JM USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Lijun Li
- Nutritional Immunology Laboratory, JM USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Samuel Ding
- Department of Medicine, Tufts University School of Medicine, Boston, MA, United States
| | - Simin Nikbin Meydani
- Nutritional Immunology Laboratory, JM USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
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3
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Le CT, Khuat LT, Caryotakis SE, Wang M, Dunai C, Nguyen AV, Vick LV, Stoffel KM, Blazar BR, Monjazeb AM, Murphy WJ, Soulika AM. PD-1 Blockade Reverses Obesity-Mediated T Cell Priming Impairment. Front Immunol 2020; 11:590568. [PMID: 33193426 PMCID: PMC7658608 DOI: 10.3389/fimmu.2020.590568] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Accepted: 09/22/2020] [Indexed: 01/22/2023] Open
Abstract
Despite obesity reaching pandemic proportions, its impact on antigen-specific T cell responses is still unclear. We have recently demonstrated that obesity results in increased expression of PD-1 on T cells, and checkpoint blockade targeting PD-1/PD-L1 surprisingly resulted in greater clinical efficacy in cancer therapy. Adverse events associated with this therapy center around autoimmune reactions. In this study, we examined the impact of obesity on T cell priming and on autoimmune pathogenesis using the mouse model experimental autoimmune encephalomyelitis (EAE), which is mediated by autoreactive myelin-specific T cells generated after immunization. We observed that diet-induced obese (DIO) mice had a markedly delayed EAE onset and developed milder clinical symptoms compared to mice on control diet (CD). This delay was associated with impaired generation of myelin-specific T cell numbers and concurrently correlated with increased PD-L1 upregulation on antigen-presenting cells in secondary lymphoid organs. PD-1 blockade during the priming stage of EAE restored disease onset and severity and increased numbers of pathogenic CD4+ T cells in the central nervous system (CNS) of DIO mice to similar levels to those of CD mice. Administration of anti-PD-1 after onset of clinical symptoms did not increase EAE pathogenesis demonstrating that initial priming is the critical juncture affected by obesity. These findings demonstrate that obesity impairs antigen-specific T cell priming, but this can be reversed with PD-1 blockade. Our results further suggest that PD-1 blockade may increase the risk of autoimmune toxicities, particularly in obesity.
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Affiliation(s)
- Catherine T Le
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA, United States
| | - Lam T Khuat
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA, United States
| | - Sofia E Caryotakis
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, CA, United States
| | - Marilyn Wang
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA, United States.,Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, CA, United States
| | - Cordelia Dunai
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA, United States
| | - Alan V Nguyen
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA, United States.,Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, CA, United States
| | - Logan V Vick
- Department of Radiation-Oncology, School of Medicine, Comprehensive Cancer Center, University of California, Davis, Sacramento, CA, United States
| | - Kevin M Stoffel
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA, United States
| | - Bruce R Blazar
- Masonic Cancer Center, and Division of Blood and Marrow Transplantation, Department of Pediatrics, University of Minnesota, Minneapolis, MN, United States
| | - Arta M Monjazeb
- Department of Radiation-Oncology, School of Medicine, Comprehensive Cancer Center, University of California, Davis, Sacramento, CA, United States
| | - William J Murphy
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA, United States.,Department of Internal Medicine, Division of Hematology and Oncology, School of Medicine, University of California, Davis, Sacramento, CA, United States
| | - Athena M Soulika
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA, United States.,Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, CA, United States
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4
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Reddaway J, Brydges NM. Enduring neuroimmunological consequences of developmental experiences: From vulnerability to resilience. Mol Cell Neurosci 2020; 109:103567. [PMID: 33068720 PMCID: PMC7556274 DOI: 10.1016/j.mcn.2020.103567] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 09/14/2020] [Accepted: 10/12/2020] [Indexed: 12/14/2022] Open
Abstract
The immune system is crucial for normal neuronal development and function (neuroimmune system). Both immune and neuronal systems undergo significant postnatal development and are sensitive to developmental programming by environmental experiences. Negative experiences from infection to psychological stress at a range of different time points (in utero to adolescence) can permanently alter the function of the neuroimmune system: given its prominent role in normal brain development and function this dysregulation may increase vulnerability to psychiatric illness. In contrast, positive experiences such as exercise and environmental enrichment are protective and can promote resilience, even restoring the detrimental effects of negative experiences on the neuroimmune system. This suggests the neuroimmune system is a viable therapeutic target for treatment and prevention of psychiatric illnesses, especially those related to stress. In this review we will summarise the main cells, molecules and functions of the immune system in general and with specific reference to central nervous system development and function. We will then discuss the effects of negative and positive environmental experiences, especially during development, in programming the long-term functioning of the neuroimmune system. Finally, we will review the sparse but growing literature on sex differences in neuroimmune development and response to environmental experiences. The immune system is essential for development and function of the central nervous system (neuroimmune system) Environmental experiences can permanently alter neuroimmune function and associated brain development Altered neuroimmune function following negative developmental experiences may play a role in psychiatric illnesses Positive experiences can promote resilience and rescue the effects of negative experiences on the neuroimmune system The neuroimmune system is therefore a viable therapeutic target for preventing and treating psychiatric illnesses
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Affiliation(s)
- Jack Reddaway
- Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff CF24 4HQ, UK
| | - Nichola M Brydges
- Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff CF24 4HQ, UK.
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5
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Yin T, Bayanjargal S, Fang B, Inaba C, Mutoh M, Kawahara T, Tanaka S, Watanabe J. Lactobacillus plantarum Shinshu N-07 isolated from fermented Brassica rapa L. attenuates visceral fat accumulation induced by high-fat diet in mice. Benef Microbes 2020; 11:655-667. [PMID: 33045842 DOI: 10.3920/bm2020.0009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Lactobacillus plantarum Shinshu N-07 (N07) and Lactobacillus curvatus #4G2 (#4G2) were isolated from fermented Brassica rapa L. and selected as promising probiotics with anti-adiposity activities based on in vitro assays. The anti-adiposity effects of these two strains were investigated using a diet-induced obesity animal model. Epididymal adipose tissue weight and adipocyte area were significantly lower and serum triglycerides and glucose tended to be lower in mice fed the high-fat diet supplemented with N07 compared with those fed the unsupplemented high-fat diet. Strain N07 suppressed hepatic steatosis, with accompanying downregulation of lipogenic genes in the liver. Expression of inflammatory cytokines and macrophage infiltration markers tended to be suppressed by N07 supplementation. Upregulation of uncoupling protein-1 in epididymal adipose tissue by N07 suggested that the transformation of white adipose tissue to brown might have been induced. Intestinal microbiota analysis revealed that a decrease in abundance of family S24-7 (phylum Bacteroidetes) following ingestion of the high-fat diet was partly recovered by supplementation with N07. Changes in those parameters were not observed in mice fed the high-fat diet supplemented with strain #4G2, suggesting strain specificities. Thus, N07 is a potential probiotic strain that could be used to develop functional foods that attenuate visceral fat accumulation after an appropriate human intervention trial.
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Affiliation(s)
- T Yin
- Food Research Institute, National Agriculture and Food Research Organization, 305-8642 Tsukuba, Japan.,School of Integrative and Global Majors, University of Tsukuba, 305-8577 Tsukuba, Japan
| | - S Bayanjargal
- Food Research Institute, National Agriculture and Food Research Organization, 305-8642 Tsukuba, Japan.,School of Integrative and Global Majors, University of Tsukuba, 305-8577 Tsukuba, Japan
| | - B Fang
- Food Research Institute, National Agriculture and Food Research Organization, 305-8642 Tsukuba, Japan
| | - C Inaba
- Academic Assembly (Institute of Agriculture), Shinshu University, 399-4598 Minamiminowa, Japan
| | - M Mutoh
- Epidemiology and Prevention Division, National Cancer Center, 104-0045 Tokyo, Japan
| | - T Kawahara
- Academic Assembly (Institute of Agriculture), Shinshu University, 399-4598 Minamiminowa, Japan
| | - S Tanaka
- Academic Assembly (Institute of Agriculture), Shinshu University, 399-4598 Minamiminowa, Japan
| | - J Watanabe
- Food Research Institute, National Agriculture and Food Research Organization, 305-8642 Tsukuba, Japan.,School of Integrative and Global Majors, University of Tsukuba, 305-8577 Tsukuba, Japan.,Department of Food Science, Obihiro University of Agriculture and Veterinary Medicine, 080-8555 Obihiro, Japan
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6
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Taylor LE, Ramirez LA, Musall JB, Sullivan JC. Tipping the scales: Are females more at risk for obesity- and high-fat diet-induced hypertension and vascular dysfunction? Br J Pharmacol 2019; 176:4226-4242. [PMID: 31271650 DOI: 10.1111/bph.14783] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 06/04/2019] [Accepted: 06/08/2019] [Indexed: 12/17/2022] Open
Abstract
Obesity is a common metabolic disorder that has become a widespread epidemic in several countries. Sex and gender disparities in the prevalence of cardiovascular disease (CVD) have been well documented with premenopausal women having a lower incidence of CVD than age-matched men. However, women are more likely than men to suffer from obesity, which can predispose them to a greater risk of CVD. The mechanisms underlying high-fat diet (HFD)- or obesity-induced hypertension are not well defined, although immune system activation and inflammation have been implicated in several studies. Further, the sex of the subject can have a profound influence on the immune response to hypertensive stimuli. Therefore, the purpose of this review is to examine the effects of sex and gender on the role of the immune system in HFD-induced hypertension and vascular dysfunction. LINKED ARTICLES: This article is part of a themed section on The Importance of Sex Differences in Pharmacology Research. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v176.21/issuetoc.
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Affiliation(s)
- Lia E Taylor
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Lindsey A Ramirez
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Jacqueline B Musall
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Jennifer C Sullivan
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, Georgia
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7
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Guerrero-Ros I, Clement CC, Reynolds CA, Patel B, Santambrogio L, Cuervo AM, Macian F. The negative effect of lipid challenge on autophagy inhibits T cell responses. Autophagy 2019; 16:223-238. [PMID: 30982401 DOI: 10.1080/15548627.2019.1606635] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Obesity is associated with changes in the immune system that significantly hinder its ability to mount efficient immune responses. Previous studies have reported a dysregulation of immune responses caused by lipid challenge; however, the mechanisms underlying that dysregulation are still not completely understood. Autophagy is an essential catabolic process through which cellular components are degraded by the lysosomal machinery. In T cells, autophagy is an actively regulated process necessary to sustain homeostasis and activation. Here, we report that CD4+ T cell responses are inhibited when cells are challenged with increasing concentrations of fatty acids. Furthermore, analysis of T cells from diet-induced obese mice confirms that high lipid load inhibits activation-induced responses in T cells. We have found that autophagy is inhibited in CD4+ T cells exposed in vitro or in vivo to lipid stress, which causes decreased autophagosome formation and degradation. Supporting that inhibition of autophagy caused by high lipid load is a key mechanism that accounts for the effects on T cell function of lipid stress, we found that ATG7 (autophagy-related 7)-deficient T cells, unable to activate autophagy, did not show additional inhibitory effects on their responses to activation when subjected to lipid challenge. Our results indicate, thus, that increased lipid load can dysregulate autophagy and cause defective T cell responses, and suggest that inhibition of autophagy may underlie some of the characteristic obesity-associated defects in the T cell compartment.Abbreviations: ACTB: actin, beta; ATG: autophagy-related; CDKN1B: cyclin-dependent kinase inhibitor 1B; HFD: high-fat diet; IFNG: interferon gamma; IL: interleukin; MAPK1/ERK2: mitogen-activated protein kinase 1; MAPK3/ERK1: mitogen-activated protein kinase 3; MAPK8/JNK: mitogen-activated protein kinase 8; LC3-I: non-conjugated form of MAP1LC3B; LC3-II: phosphatidylethanolamine-conjugated form of MAP1LC3B; MAP1LC3B: microtubule-associated protein 1 light chain 3 beta; MS: mass spectrometry; MTOR: mechanistic target of rapamycin kinase; NFATC2: nuclear factor of activated T cells, cytoplasmic, calcineurin dependent 2; NLRP3: NLR family, pyrin domain containing 3; OA: oleic acid; PI: propidium iodide; ROS: reactive oxygen species; STAT5A: signal transducer and activator of transcription 5A; TCR: T cell receptor; TH1: T helper cell type 1.
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Affiliation(s)
| | - Cristina C Clement
- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Cara A Reynolds
- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Bindi Patel
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Laura Santambrogio
- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, USA.,Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, USA.,Institute for Aging Research, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Ana M Cuervo
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY, USA.,Institute for Aging Research, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Fernando Macian
- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, USA.,Institute for Aging Research, Albert Einstein College of Medicine, Bronx, NY, USA
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8
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Santos PCPD, Delmondes GMB, Melo MPP, Santos LVSE, Maia JN, Moraes SRAD, Castro CMMBD, Andrade MDA. Implicações da dieta hiperlipídica e do exercício de natação sobre os parâmetros imunológicos em ratas. REVISTA BRASILEIRA DE CIÊNCIAS DO ESPORTE 2018. [DOI: 10.1016/j.rbce.2018.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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9
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Cui J, Huang D, Zheng Y. Ameliorative effects of α-lipoic acid on high-fat diet-induced oxidative stress and glucose uptake impairment of T cells. Free Radic Res 2016; 50:1106-1115. [DOI: 10.1080/10715762.2016.1210140] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Jue Cui
- College of Food Engineering, Xuzhou Institute of Technology, Xuzhou, China
- Jiangsu Key Laboratory of Food Resource Development and Quality Safe, Xuzhou Institute of Technology, Xuzhou, China
| | - Dejian Huang
- Food Science and Technology Programme, Department of Chemistry, National University of Singapore, Singapore
| | - Yi Zheng
- College of Food Engineering, Xuzhou Institute of Technology, Xuzhou, China
- Jiangsu Key Laboratory of Food Resource Development and Quality Safe, Xuzhou Institute of Technology, Xuzhou, China
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10
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Rogers GB, Keating DJ, Young RL, Wong ML, Licinio J, Wesselingh S. From gut dysbiosis to altered brain function and mental illness: mechanisms and pathways. Mol Psychiatry 2016; 21:738-48. [PMID: 27090305 PMCID: PMC4879184 DOI: 10.1038/mp.2016.50] [Citation(s) in RCA: 565] [Impact Index Per Article: 70.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 02/22/2016] [Accepted: 02/25/2016] [Indexed: 02/06/2023]
Abstract
The human body hosts an enormous abundance and diversity of microbes, which perform a range of essential and beneficial functions. Our appreciation of the importance of these microbial communities to many aspects of human physiology has grown dramatically in recent years. We know, for example, that animals raised in a germ-free environment exhibit substantially altered immune and metabolic function, while the disruption of commensal microbiota in humans is associated with the development of a growing number of diseases. Evidence is now emerging that, through interactions with the gut-brain axis, the bidirectional communication system between the central nervous system and the gastrointestinal tract, the gut microbiome can also influence neural development, cognition and behaviour, with recent evidence that changes in behaviour alter gut microbiota composition, while modifications of the microbiome can induce depressive-like behaviours. Although an association between enteropathy and certain psychiatric conditions has long been recognized, it now appears that gut microbes represent direct mediators of psychopathology. Here, we examine roles of gut microbiome in shaping brain development and neurological function, and the mechanisms by which it can contribute to mental illness. Further, we discuss how the insight provided by this new and exciting field of research can inform care and provide a basis for the design of novel, microbiota-targeted, therapies.
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Affiliation(s)
- G B Rogers
- South Australian Health and Medical Research Institute, Infection and Immunity Theme, School of Medicine, Flinders University, Adelaide, SA, Australia
| | - D J Keating
- South Australian Health and Medical Research Institute, Centre for Neuroscience and Department of Human Physiology, Flinders University, Adelaide, SA, Australia
| | - R L Young
- South Australian Health and Medical Research Institute, Department of Medicine, University of Adelaide, Adelaide, SA, Australia
| | - M-L Wong
- South Australian Health and Medical Research Institute, Mind and Brain Theme, and Flinders University, Adelaide, SA, Australia
| | - J Licinio
- South Australian Health and Medical Research Institute, Mind and Brain Theme, and Flinders University, Adelaide, SA, Australia
| | - S Wesselingh
- South Australian Health and Medical Research Institute, Infection and Immunity Theme, School of Medicine, Flinders University, Adelaide, SA, Australia
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11
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Pollock AH, Tedla N, Hancock SE, Cornely R, Mitchell TW, Yang Z, Kockx M, Parton RG, Rossy J, Gaus K. Prolonged Intake of Dietary Lipids Alters Membrane Structure and T Cell Responses in LDLr-/- Mice. THE JOURNAL OF IMMUNOLOGY 2016; 196:3993-4002. [PMID: 27183636 DOI: 10.4049/jimmunol.1501261] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 03/13/2016] [Indexed: 11/19/2022]
Abstract
Although it is recognized that lipids and membrane organization in T cells affect signaling and T cell activation, to what extent dietary lipids alter T cell responsiveness in the absence of obesity and inflammation is not known. In this study, we fed low-density lipoprotein receptor knockout mice a Western high-fat diet for 1 or 9 wk and examined T cell responses in vivo along with T cell lipid composition, membrane order, and activation ex vivo. Our data showed that high levels of circulating lipids for a prolonged period elevated CD4(+) and CD8(+) T cell proliferation and resulted in an increased proportion of CD4(+) central-memory T cells within the draining lymph nodes following induction of contact hypersensitivity. In addition, the 9-wk Western high-fat diet elevated the total phospholipid content and monounsaturated fatty acid level, but decreased saturated phosphatidylcholine and sphingomyelin within the T cells. The altered lipid composition in the circulation, and of T cells, was also reflected by enhanced membrane order at the activation site of ex vivo activated T cells that corresponded to increased IL-2 mRNA levels. In conclusion, dietary lipids can modulate T cell lipid composition and responses in lipoprotein receptor knockout mice even in the absence of excess weight gain and a proinflammatory environment.
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Affiliation(s)
- Abigail H Pollock
- European Molecular Biology Laboratory Australia Node in Single Molecule Science, School of Medical Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia; Australian Research Council Centre of Excellence in Advanced Molecular Imaging, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Nicodemus Tedla
- School of Medical Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Sarah E Hancock
- Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, New South Wales 2522, Australia
| | - Rhea Cornely
- European Molecular Biology Laboratory Australia Node in Single Molecule Science, School of Medical Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia; Australian Research Council Centre of Excellence in Advanced Molecular Imaging, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Todd W Mitchell
- Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, New South Wales 2522, Australia
| | - Zhengmin Yang
- European Molecular Biology Laboratory Australia Node in Single Molecule Science, School of Medical Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia; Australian Research Council Centre of Excellence in Advanced Molecular Imaging, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Maaike Kockx
- Australian and New Zealand Army Corps Research Institute, Concord Repatriation General Hospital, Concord, New South Wales 2139, Australia; and
| | - Robert G Parton
- Institute of Molecular Bioscience and Centre for Microscopy and Microanalysis, University of Queensland, Australia, St. Lucia, Brisbane, Queensland 4072, Australia
| | - Jérémie Rossy
- European Molecular Biology Laboratory Australia Node in Single Molecule Science, School of Medical Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia; Australian Research Council Centre of Excellence in Advanced Molecular Imaging, University of New South Wales, Sydney, New South Wales 2052, Australia;
| | - Katharina Gaus
- European Molecular Biology Laboratory Australia Node in Single Molecule Science, School of Medical Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia; Australian Research Council Centre of Excellence in Advanced Molecular Imaging, University of New South Wales, Sydney, New South Wales 2052, Australia;
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12
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Verwaerde C, Debrie AS, Dombu C, Legrand D, Raze D, Lecher S, Betbeder D, Locht C. HBHA vaccination may require both Th1 and Th17 immune responses to protect mice against tuberculosis. Vaccine 2014; 32:6240-50. [PMID: 25252198 DOI: 10.1016/j.vaccine.2014.09.024] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 08/12/2014] [Accepted: 09/08/2014] [Indexed: 11/19/2022]
Abstract
Almost one century after the discovery of the BCG vaccine, tuberculosis remains a major cause of global mortality and morbidity, emphasizing the urgent need to design more efficient vaccines. The heparin-binding haemagglutinin (HBHA) appears to be a promising vaccine candidate, as it was shown to afford protection to mice against a challenge infection with Mycobacterium tuberculosis when combined with the strong adjuvant DDA/MPL (dimethyldioctadecyl-ammonium bromide/monophosphoryl lipid A), a TLR4 ligand. In this study, we investigated the immunological response and protection of mice immunized with HBHA formulated in lipid-containing nanoparticles and adjuvanted with CpG, a TLR9 ligand. Subcutaneous immunization with this HBHA formulation led to a marked Th1 response, characterized by high IFN-γ levels, but no significant IL-17 production, both in spleen and lung, in contrast to DDA/MPL MPL-formulated HBHA, which induced both IFN-γ and IL-17. This cytokine profile was also observed in BCG-primed mice and persisted after M. tuberculosis infection. No significant protection was obtained against challenge infection after vaccination with the nanoparticle-CpG formulation, and this was associated with a failure to mount a memory immune response. These results suggest the importance of both Th1 and Th17 immune responses for vaccine-induced immunity.
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Affiliation(s)
- Claudie Verwaerde
- Inserm U1019, Lille, France; CNRS UMR8204, Lille, France; Institut Pasteur de Lille, Center for Infection and Immunity of Lille, Lille, France; Univ Lille Nord de France, Lille, France.
| | - Anne-Sophie Debrie
- Inserm U1019, Lille, France; CNRS UMR8204, Lille, France; Institut Pasteur de Lille, Center for Infection and Immunity of Lille, Lille, France; Univ Lille Nord de France, Lille, France
| | | | - Damien Legrand
- Institut Pasteur de Lille, Center for Infection and Immunity of Lille, Lille, France
| | - Dominique Raze
- Inserm U1019, Lille, France; CNRS UMR8204, Lille, France; Institut Pasteur de Lille, Center for Infection and Immunity of Lille, Lille, France; Univ Lille Nord de France, Lille, France
| | - Sophie Lecher
- Inserm U1019, Lille, France; CNRS UMR8204, Lille, France; Institut Pasteur de Lille, Center for Infection and Immunity of Lille, Lille, France; Univ Lille Nord de France, Lille, France
| | | | - Camille Locht
- Inserm U1019, Lille, France; CNRS UMR8204, Lille, France; Institut Pasteur de Lille, Center for Infection and Immunity of Lille, Lille, France; Univ Lille Nord de France, Lille, France
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13
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James BR, Anderson KG, Brincks EL, Kucaba TA, Norian LA, Masopust D, Griffith TS. CpG-mediated modulation of MDSC contributes to the efficacy of Ad5-TRAIL therapy against renal cell carcinoma. Cancer Immunol Immunother 2014; 63:1213-27. [PMID: 25143233 DOI: 10.1007/s00262-014-1598-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Accepted: 08/07/2014] [Indexed: 01/04/2023]
Abstract
Tumor progression occurs through the modulation of a number of physiological parameters, including the development of immunosuppressive mechanisms to prevent immune detection and response. Among these immune evasion mechanisms, the mobilization of myeloid-derived suppressor cells (MDSC) is a major contributor to the suppression of antitumor T-cell immunity. Patients with renal cell carcinoma (RCC) show increased MDSC, and methods are being explored clinically to reduce the prevalence of MDSC and/or inhibit their function. In the present study, we investigated the relationship between MDSC and the therapeutic potential of a TRAIL-encoding recombinant adenovirus (Ad5-TRAIL) in combination with CpG-containing oligodeoxynucleotides (Ad5-TRAIL/CpG) in an orthotopic mouse model of RCC. This immunotherapy effectively clears renal (Renca) tumors and enhances survival, despite the presence of a high frequency of MDSC in the spleens and primary tumor-bearing kidneys at the time of treatment. Subsequent analyses revealed that the CpG component of the immunotherapy was responsible for decreasing the frequency of MDSC in Renca-bearing mice; further, treatment with CpG modulated the phenotype and function of MDSC that remained after immunotherapy and correlated with an increased T-cell response. Interestingly, the CpG-dependent alterations in MDSC frequency and function did not occur in tumor-bearing mice complicated with diet-induced obesity. Collectively, these data suggest that in addition to its adjuvant properties, CpG also enhances antitumor responses by altering the number and function of MDSC.
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Affiliation(s)
- Britnie R James
- Department of Urology, University of Minnesota, 3-125 CCRB, 2231 6th St. SE, Minneapolis, MN, 55455, USA
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14
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Makki K, Taront S, Molendi-Coste O, Bouchaert E, Neve B, Eury E, Lobbens S, Labalette M, Duez H, Staels B, Dombrowicz D, Froguel P, Wolowczuk I. Beneficial metabolic effects of rapamycin are associated with enhanced regulatory cells in diet-induced obese mice. PLoS One 2014; 9:e92684. [PMID: 24710396 PMCID: PMC3977858 DOI: 10.1371/journal.pone.0092684] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Accepted: 02/25/2014] [Indexed: 12/20/2022] Open
Abstract
The “mechanistic target of rapamycin” (mTOR) is a central controller of growth, proliferation and/or motility of various cell-types ranging from adipocytes to immune cells, thereby linking metabolism and immunity. mTOR signaling is overactivated in obesity, promoting inflammation and insulin resistance. Therefore, great interest exists in the development of mTOR inhibitors as therapeutic drugs for obesity or diabetes. However, despite a plethora of studies characterizing the metabolic consequences of mTOR inhibition in rodent models, its impact on immune changes associated with the obese condition has never been questioned so far. To address this, we used a mouse model of high-fat diet (HFD)-fed mice with and without pharmacologic mTOR inhibition by rapamycin. Rapamycin was weekly administrated to HFD-fed C57BL/6 mice for 22 weeks. Metabolic effects were determined by glucose and insulin tolerance tests and by indirect calorimetry measures of energy expenditure. Inflammatory response and immune cell populations were characterized in blood, adipose tissue and liver. In parallel, the activities of both mTOR complexes (e. g. mTORC1 and mTORC2) were determined in adipose tissue, muscle and liver. We show that rapamycin-treated mice are leaner, have enhanced energy expenditure and are protected against insulin resistance. These beneficial metabolic effects of rapamycin were associated to significant changes of the inflammatory profiles of both adipose tissue and liver. Importantly, immune cells with regulatory functions such as regulatory T-cells (Tregs) and myeloid-derived suppressor cells (MDSCs) were increased in adipose tissue. These rapamycin-triggered metabolic and immune effects resulted from mTORC1 inhibition whilst mTORC2 activity was intact. Taken together, our results reinforce the notion that controlling immune regulatory cells in metabolic tissues is crucial to maintain a proper metabolic status and, more generally, comfort the need to search for novel pharmacological inhibitors of the mTOR signaling pathway to prevent and/or treat metabolic diseases.
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Affiliation(s)
- Kassem Makki
- Centre National de la Recherche Scientifique (CNRS), Unité Mixte de Recherche (UMR)8199, Lille Pasteur Institute, Lille, France
- Lille 2 University, Lille, France
- European Genomic Institute for Diabetes (EGID), Lille, France
| | - Solenne Taront
- Centre National de la Recherche Scientifique (CNRS), Unité Mixte de Recherche (UMR)8199, Lille Pasteur Institute, Lille, France
- Lille 2 University, Lille, France
- European Genomic Institute for Diabetes (EGID), Lille, France
| | - Olivier Molendi-Coste
- Lille 2 University, Lille, France
- European Genomic Institute for Diabetes (EGID), Lille, France
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR1011, Lille Pasteur Institute, Lille, France
| | - Emmanuel Bouchaert
- Lille 2 University, Lille, France
- European Genomic Institute for Diabetes (EGID), Lille, France
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR1011, Lille Pasteur Institute, Lille, France
| | - Bernadette Neve
- Centre National de la Recherche Scientifique (CNRS), Unité Mixte de Recherche (UMR)8199, Lille Pasteur Institute, Lille, France
- Lille 2 University, Lille, France
- European Genomic Institute for Diabetes (EGID), Lille, France
| | - Elodie Eury
- Centre National de la Recherche Scientifique (CNRS), Unité Mixte de Recherche (UMR)8199, Lille Pasteur Institute, Lille, France
- Lille 2 University, Lille, France
- European Genomic Institute for Diabetes (EGID), Lille, France
| | - Stéphane Lobbens
- Centre National de la Recherche Scientifique (CNRS), Unité Mixte de Recherche (UMR)8199, Lille Pasteur Institute, Lille, France
- Lille 2 University, Lille, France
- European Genomic Institute for Diabetes (EGID), Lille, France
| | - Myriam Labalette
- Lille 2 University, Lille, France
- Immunology Institute, Centre Hospitalier Régional Universitaire (CHRU) Lille and Equipe d'Accueil (EA)2686, Lille 2 University, Lille, France
| | - Hélène Duez
- Lille 2 University, Lille, France
- European Genomic Institute for Diabetes (EGID), Lille, France
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR1011, Lille Pasteur Institute, Lille, France
| | - Bart Staels
- Lille 2 University, Lille, France
- European Genomic Institute for Diabetes (EGID), Lille, France
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR1011, Lille Pasteur Institute, Lille, France
| | - David Dombrowicz
- Lille 2 University, Lille, France
- European Genomic Institute for Diabetes (EGID), Lille, France
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR1011, Lille Pasteur Institute, Lille, France
| | - Philippe Froguel
- Centre National de la Recherche Scientifique (CNRS), Unité Mixte de Recherche (UMR)8199, Lille Pasteur Institute, Lille, France
- Lille 2 University, Lille, France
- European Genomic Institute for Diabetes (EGID), Lille, France
- Department of Genomics of Common Disease, School of Public Health, Imperial College London, London, United Kingdom
- * E-mail: (PF); (IW)
| | - Isabelle Wolowczuk
- Centre National de la Recherche Scientifique (CNRS), Unité Mixte de Recherche (UMR)8199, Lille Pasteur Institute, Lille, France
- Lille 2 University, Lille, France
- European Genomic Institute for Diabetes (EGID), Lille, France
- * E-mail: (PF); (IW)
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15
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Sanz Y, Moya-Pérez A. Microbiota, Inflammation and Obesity. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 817:291-317. [DOI: 10.1007/978-1-4939-0897-4_14] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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16
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Adipose tissue in obesity-related inflammation and insulin resistance: cells, cytokines, and chemokines. ISRN INFLAMMATION 2013; 2013:139239. [PMID: 24455420 PMCID: PMC3881510 DOI: 10.1155/2013/139239] [Citation(s) in RCA: 658] [Impact Index Per Article: 59.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Accepted: 11/14/2013] [Indexed: 12/13/2022]
Abstract
Adipose tissue is a complex organ that comprises a wide range of cell types with diverse energy storage, metabolic regulation, and neuroendocrine and immune functions. Because it contains various immune cells, either adaptive (B and T lymphocytes; such as regulatory T cells) or innate (mostly macrophages and, more recently identified, myeloid-derived suppressor cells), the adipose tissue is now considered as a bona fide immune organ, at the cross-road between metabolism and immunity. Adipose tissue disorders, such as those encountered in obesity and lipodystrophy, cause alterations to adipose tissue distribution and function with broad effects on cytokine, chemokine, and hormone expression, on lipid storage, and on the composition of adipose-resident immune cell populations. The resulting changes appear to induce profound consequences for basal systemic inflammation and insulin sensitivity. The purpose of this review is to synthesize the current literature on adipose cell composition remodeling in obesity, which shows how adipose-resident immune cells regulate inflammation and insulin resistance—notably through cytokine and chemokine secretion—and highlights major research questions in the field.
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17
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Gauffin Cano P, Santacruz A, Moya Á, Sanz Y. Bacteroides uniformis CECT 7771 ameliorates metabolic and immunological dysfunction in mice with high-fat-diet induced obesity. PLoS One 2012; 7:e41079. [PMID: 22844426 PMCID: PMC3406031 DOI: 10.1371/journal.pone.0041079] [Citation(s) in RCA: 264] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Accepted: 06/19/2012] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Associations have been made between obesity and reduced intestinal numbers of members of the phylum Bacteroidetes, but there is no direct evidence of the role these bacteria play in obesity. Herein, the effects of Bacteroides uniformis CECT 7771 on obesity-related metabolic and immune alterations have been evaluated. METHODS AND FINDINGS Adult (6-8 week) male wild-type C57BL-6 mice were fed a standard diet or a high-fat-diet HFD to induce obesity, supplemented or not with B. uniformis CECT 7771 for seven weeks. Animal weight was monitored and histologic, biochemical, immunocompetent cell functions, and features of the faecal microbiota were analysed after intervention. The oral administration of B. uniformis CECT 7771 reduced body weight gain, liver steatosis and liver cholesterol and triglyceride concentrations and increased small adipocyte numbers in HFD-fed mice. The strain also reduced serum cholesterol, triglyceride, glucose, insulin and leptin levels, and improved oral tolerance to glucose in HFD fed mice. The bacterial strain also reduced dietary fat absorption, as indicated by the reduced number of fat micelles detected in enterocytes. Moreover, B. uniformis CECT 7771 improved immune defence mechanisms, impaired in obesity. HFD-induced obesity led to a decrease in TNF-α production by peritoneal macrophages stimulated with LPS, conversely, the administration of B. uniformis CECT 7771 increased TNF-α production and phagocytosis. Administering this strain also increased TNF-α production by dendritic cells (DCs) in response to LPS stimulation, which was significantly reduced by HFD. B. uniformis CECT 7771 also restored the capacity of DCs to induce a T-cell proliferation response, which was impaired in obese mice. HFD induced marked changes in gut microbiota composition, which were partially restored by the intervention. CONCLUSIONS Altogether, the findings indicate that administration of B. uniformis CECT 7771 ameliorates HFD-induced metabolic and immune dysfunction associated with intestinal dysbiosis in obese mice.
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Affiliation(s)
- Paola Gauffin Cano
- Microbial Ecology and Nutrition Research Group, Institute of Agrochemistry and Food Technology (IATA), National Research Council (CSIC), Valencia, Spain
| | - Arlette Santacruz
- Microbial Ecology and Nutrition Research Group, Institute of Agrochemistry and Food Technology (IATA), National Research Council (CSIC), Valencia, Spain
| | - Ángela Moya
- Microbial Ecology and Nutrition Research Group, Institute of Agrochemistry and Food Technology (IATA), National Research Council (CSIC), Valencia, Spain
| | - Yolanda Sanz
- Microbial Ecology and Nutrition Research Group, Institute of Agrochemistry and Food Technology (IATA), National Research Council (CSIC), Valencia, Spain
- * E-mail:
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18
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James BR, Tomanek-Chalkley A, Askeland EJ, Kucaba T, Griffith TS, Norian LA. Diet-induced obesity alters dendritic cell function in the presence and absence of tumor growth. THE JOURNAL OF IMMUNOLOGY 2012; 189:1311-21. [PMID: 22745381 DOI: 10.4049/jimmunol.1100587] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Obesity is a mounting health concern in the United States and is associated with an increased risk for developing several cancers, including renal cell carcinoma (RCC). Despite this, little is known regarding the impact of obesity on antitumor immunity. Because dendritic cells (DC) are critical regulators of antitumor immunity, we examined the combined effects of obesity and tumor outgrowth on DC function. Using a diet-induced obesity (DIO) model, DC function was evaluated in mice bearing orthotopic RCC and in tumor-free controls. Tumor-free DIO mice had profoundly altered serum cytokine and chemokine profiles, with upregulation of 15 proteins, including IL-1α, IL-17, and LIF. Tumor-free DIO mice had elevated percentages of conventional splenic DC that were impaired in their ability to stimulate naive T cell expansion, although they were phenotypically similar to normal weight (NW) controls. In DIO mice, intrarenal RCC tumor challenge in the absence of therapy led to increased local infiltration by T cell-suppressive DC and accelerated early tumor outgrowth. Following administration of a DC-dependent immunotherapy, established RCC tumors regressed in normal weight mice. The same immunotherapy was ineffective in DIO mice and was characterized by an accumulation of regulatory DC in tumor-bearing kidneys, decreased local infiltration by IFN-γ-producing CD8 T cells, and progressive tumor outgrowth. Our results suggest that the presence of obesity as a comorbidity can impair the efficacy of DC-dependent antitumor immunotherapies.
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Affiliation(s)
- Britnie R James
- Microbiology, Immunology, and Cancer Biology Program, University of Minnesota, Minneapolis, MN 55455, USA
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19
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Pamir N, McMillen TS, Edgel KA, Kim F, LeBoeuf RC. Deficiency of lymphotoxin-α does not exacerbate high-fat diet-induced obesity but does enhance inflammation in mice. Am J Physiol Endocrinol Metab 2012; 302:E961-71. [PMID: 22318945 PMCID: PMC3330720 DOI: 10.1152/ajpendo.00447.2011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Lymphotoxin-α (LTα) is secreted by lymphocytes and acts through tumor necrosis factor-α receptors and the LTβ receptor. Our goals were to determine whether LT has a role in obesity and investigate whether LT contributes to the link between obesity and adipose tissue lymphocyte accumulation. LT deficient (LT(-/-)) and wild-type (WT) mice were fed standard pelleted rodent chow or a high-fat/high-sucrose diet (HFHS) for 13 wk. Body weight, body composition, and food intake were measured. Glucose tolerance was assessed. Systemic and adipose tissue inflammatory statuses were evaluated by quantifying plasma adipokine levels and tissue macrophage and T cell-specific gene expression in abdominal fat. LT(-/-) mice were smaller (20%) and leaner (25%) than WT controls after 13 wk of HFHS diet feeding. LT(-/-) mice showed improved glucose tolerance, suggesting that, in WT mice, LT may impair glucose metabolism. Surprisingly, adipose tissue from rodent chow- and HFHS-fed LT(-/-) mice exhibited increased T lymphocyte and macrophage infiltration compared with WT mice. Despite the fact that LT(-/-) mice exhibited an enhanced inflammatory status at the systemic and tissue level even when fed rodent chow, they were protected from enhanced diet-induced obesity and insulin resistance. Thus, LT contributes to body weight and adiposity and is required to modulate the accumulation of immune cells in adipose tissue.
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Affiliation(s)
- Nathalie Pamir
- Department of Medicine, Div. of Metabolism, Endocrinology, and Nutrition, Univ. of Washington, Seattle, WA 98109-8050, USA
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Abstract
There is strong evidence indicating that excess adiposity negatively impacts immune function and host defence in obese individuals. This is a review of research findings concerning the impact of obesity on the immune response to infection, including a discussion of possible mechanisms. Obesity is characterised by a state of low-grade, chronic inflammation in addition to disturbed levels of circulating nutrients and metabolic hormones. The impact of these metabolic abnormalities on obesity-related comorbidities has undergone intense scrutiny over the past decade. However, relatively little is known of how the immune system and host defence are influenced by the pro-inflammatory and excess energy milieu of the obese. Epidemiological data suggest obese human subjects are at greater risk for nosocomial infections, especially following surgery. Additionally, the significance of altered immunity in obese human subjects is emphasised by recent studies reporting obesity to be an independent risk factor for increased morbidity and mortality following infection with the 2009 pandemic influenza A (H1N1) virus. Rodent models offer important insight into how metabolic abnormalities associated with excess body weight can impair immunity. However, more research is necessary to understand the specific aspects of immunity that are impaired and what factors are contributing to reduced immunocompetence in the obese. Additionally, special consideration of how infection in this at-risk population is managed is required, given that this population may not respond optimally to antimicrobial drugs and vaccination. Obesity impacts millions globally, and greater understanding of its associated physiological disturbances is a key public health concern.
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Kim YH, Kim JK, Kim DJ, Nam JH, Shim SM, Choi YK, Lee CH, Poo H. Diet-induced obesity dramatically reduces the efficacy of a 2009 pandemic H1N1 vaccine in a mouse model. J Infect Dis 2011; 205:244-51. [PMID: 22147801 DOI: 10.1093/infdis/jir731] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Obesity, a risk factor for increased severity of diverse diseases, is believed to have negative impact on vaccine efficacy. Recently, mortality has emerged as an outcome of pandemic influenza A virus subtype H1N1, necessitating development of effective vaccine strategies. Here we investigated effects of diet-induced obesity on vaccine-induced immune responses and protective efficacy against pandemic H1N1 influenza virus. METHODS Diet-induced obese and lean C57BL/6J mice were immunized with commercial monovalent 2009 H1N1 vaccine, and antigen-specific antibody responses and neutralizing activities were observed. Following vaccination, mice were challenged with homologous H1N1 virus, and pathogenesis and mortality were examined. RESULTS Vaccine-induced H1N1-specific antibody responses and neutralizing activities were markedly reduced in obese mice. Consistent with antibody responses, lung virus titers were significantly higher in obese mice than in lean controls after challenge. In addition, obese group showed greatly increased expression of proinflammatory cytokines and chemokines in lung tissue, severe lung inflammation, and higher eventual mortality rate (100%) compared with that among lean control mice (14%). CONCLUSIONS Our results show that prophylactic immune responses and protectiveness induced by 2009 H1N1 vaccine could be extremely compromised in diet-induced obesity. These results suggest that novel vaccination strategies for high-risk groups, including the obese population, are required.
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Bandaru P, Rajkumar H, Nappanveettil G. Altered or Impaired Immune Response to Hepatitis B Vaccine in WNIN/GR-Ob Rat: An Obese Rat Model with Impaired Glucose Tolerance. ISRN ENDOCRINOLOGY 2011; 2011:980105. [PMID: 22363894 PMCID: PMC3262630 DOI: 10.5402/2011/980105] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2011] [Accepted: 06/19/2011] [Indexed: 02/02/2023]
Abstract
Obesity is shown to increase the incidence and severity of infectious diseases and
individuals seem to exhibit poor antibody response to vaccination due to several inherent immune defects. With the increasing prevalence of impaired glucose tolerance (IGT) seen in obese individuals, the present study was aimed to investigate the basal immune response and immune response upon Hepatitis B vaccination (HBV) in an obese rat model WNIN/GR-Ob with impaired glucose tolerance (IGT). Decreased proportions of splenic CD4+ T helper cells and CD3+ T cells were observed in obese animals compared to lean animals. Upon HBV, obese animals showed reduced cell-mediated immunity and humoral immunity in terms of splenic lymphocyte proliferative response to Concanavalin A (Con A) and Hepatitis B surface antigen (HBsAg) and HBsAg-specific IgG response. Innate immunity as assessed in terms of Tumor Necrosis Factor α (TNF α) and Nitric oxide (NO) production by peritoneal macrophages upon HBV was low and unchanged, respectively, in obese animals. Thus long-term immunological memory is impaired or altered upon HBV.
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Affiliation(s)
- Prathibha Bandaru
- Department of Microbiology, National Institute of Nutrition, Jamai Osmania, Hyderabad 500 604, India
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23
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Altered or impaired immune response upon vaccination in WNIN/Ob rats. Vaccine 2011; 29:3038-42. [PMID: 21320543 DOI: 10.1016/j.vaccine.2011.01.107] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2010] [Revised: 01/24/2011] [Accepted: 01/30/2011] [Indexed: 01/23/2023]
Abstract
The present study was aimed to study the immune response in three months old male and female naïve obese animals and upon hepatitis B vaccination in three months old female WNIN/Ob obese mutant rats, established at our institute in comparison with its lean litter mates. Altered immune profile was seen in naïve obese mutant rats in terms of percentage of splenic CD8(+) cytotoxic cells in males and percentages of splenic CD3(+) T lymphocytes and CD4(+) T helper cells in females respectively. Furthermore these obese mutant rats also exhibited impaired immune response to hepatitis B vaccine with low specific Hepatitis B surface antigen (HBsAg) specific IgG response and splenic lymphocyte proliferative response to HBsAg compared to the lean counterpart. The loss of immunological memory following vaccination could be attributed to the metabolic and hormonal changes associated with obesity. This observation has implication in public health policies related to vaccination in developed as well as developing countries.
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Abstract
The world is now experiencing an epidemic of obesity. Although the effects of obesity on the development of metabolic and cardiovascular problems are well studied, much less is known about the impact of obesity on immune function and infectious disease. Studies in obese humans and with obese animal models have repeatedly demonstrated impaired immune function, including decreased cytokine production, decreased response to antigen/mitogen stimulation, reduced macrophage and dendritic cell function, and natural killer cell impairment. Recent studies have demonstrated that the impaired immune response in the obese host leads to increased susceptibility to infection with a number of different pathogens such as community-acquired tuberculosis, influenza, Mycobacterium tuberculosis, coxsackievirus, Helicobacter pylori and encephalomyocarditis virus. While no specific mechanism has been defined for the decreased immune response to infectious disease in the obese host, several obesity-associated changes such as excessive inflammation, altered adipokine signaling, metabolic changes and even epigenetic regulation could affect the immune response. This review will discuss what is currently known about the relationship between obesity and infectious disease.
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Affiliation(s)
- Erik A Karlsson
- Department of Infectious Diseases, St Jude Children's Research Hospital, Memphis, TN 38105-3678
| | - Melinda A Beck
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC 27599-7461, USA
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Karlsson EA, Sheridan PA, Beck MA. Diet-induced obesity in mice reduces the maintenance of influenza-specific CD8+ memory T cells. J Nutr 2010; 140:1691-7. [PMID: 20592105 PMCID: PMC2924599 DOI: 10.3945/jn.110.123653] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Obesity has been associated with increasing the risk for type 2 diabetes and heart disease, but its influence on the immune response to viral infection is understudied. Memory T cells generated during a primary influenza infection are important for protection against subsequent influenza exposures. Previously, we have demonstrated that diet-induced obese (DIO) mice have increased morbidity and mortality following secondary influenza infection compared with lean mice. To determine whether the problem resided in a failure to maintain functional, influenza-specific CD8(+) memory T cells, male DIO and lean mice were infected with influenza X-31. At 84 d postinfection, DIO mice had a 10% reduction in memory T cell numbers. This reduction may have resulted from significantly reduced memory T cell expression of interleukin 2 receptor beta (IL-2R beta, CD122), but not IL-7 receptor alpha (CD127), which are both required for memory cell maintenance. Peripheral leptin resistance in the DIO mice may be a contributing factor to the impairment. Indeed, leptin receptor mRNA expression was significantly reduced in the lungs of obese mice, whereas suppressor of cytokine signaling (Socs)1 and Socs3 mRNA expression were increased. It is imperative to understand how the obese state alters memory T cells, because impairment in maintenance of functional memory responses has important implications for vaccine efficacy in an obese population.
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Moulin CM, Marguti I, Peron JPS, Rizzo LV, Halpern A. Impact of adiposity on immunological parameters. ACTA ACUST UNITED AC 2010; 53:183-9. [PMID: 19466211 DOI: 10.1590/s0004-27302009000200010] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2008] [Accepted: 02/18/2009] [Indexed: 01/03/2023]
Abstract
Studies evaluating immune function in obese humans and experimental animals indicate that the excess adiposity is associated with impaired in immune responses. Obesity is related to a higher rate of infections and to some types of cancer. Nutritional, metabolic and endocrine factors are implicated in the immunological changes. The adipose tissue directly produces substances with various functions related to immune system. Furthermore, some investigations suggest that certain types of weight reduction strategies can alter the immune function. Nevertheless, long-term studies should be carried out to address whether these changes positively affects the ability of these obese individuals to control infections and tumor development.
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Affiliation(s)
- Cristiane Martins Moulin
- Departamento de Endocrinologia, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, Rua Dr. Enéas de Carvalho Aguiar 255, São Paulo, SP, Brazil.
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27
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Lucas S, Verwaerde C, Wolowczuk I. Is the Adipose Tissue the Key Road to Inflammation? ACTA ACUST UNITED AC 2009. [DOI: 10.4137/iii.s2145] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Stéphanie Lucas
- Laboratoire de NeuroImmunoEndocrinologie Institut Pasteur de Lille, BP447 and IFR 142 1, rue A. Calmette Lille, F-59019, France
| | - Claudie Verwaerde
- Laboratoire de NeuroImmunoEndocrinologie Institut Pasteur de Lille, BP447 and IFR 142 1, rue A. Calmette Lille, F-59019, France
| | - Isabelle Wolowczuk
- Laboratoire de NeuroImmunoEndocrinologie Institut Pasteur de Lille, BP447 and IFR 142 1, rue A. Calmette Lille, F-59019, France
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Blangiardo M, Richardson S. A Bayesian calibration model for combining different pre-processing methods in Affymetrix chips. BMC Bioinformatics 2008; 9:512. [PMID: 19046434 PMCID: PMC2639433 DOI: 10.1186/1471-2105-9-512] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2008] [Accepted: 12/01/2008] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In gene expression studies a key role is played by the so called "pre-processing", a series of steps designed to extract the signal and account for the sources of variability due to the technology used rather than to biological differences between the RNA samples. At the moment there is no commonly agreed gold standard pre-processing method and each researcher has the responsibility to choose one method, incurring the risk of false positive and false negative features arising from the particular method chosen. RESULTS We propose a Bayesian calibration model that makes use of the information provided by several pre-processing methods and we show that this model gives a better assessment of the 'true' unknown differential expression between two conditions. We demonstrate how to estimate the posterior distribution of the differential expression values of interest from the combined information. CONCLUSION On simulated data and on the spike-in Latin Square dataset from Affymetrix the Bayesian calibration model proves to have more power than each pre-processing method. Its biological interest is demonstrated through an experimental example on publicly available data.
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Affiliation(s)
- Marta Blangiardo
- Centre for Biostatistics, Imperial College, St Mary's Campus, Norfolk Place, London, UK.
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29
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Smith AG, Sheridan PA, Tseng RJ, Sheridan JF, Beck MA. Selective impairment in dendritic cell function and altered antigen-specific CD8+ T-cell responses in diet-induced obese mice infected with influenza virus. Immunology 2008; 126:268-79. [PMID: 18754811 DOI: 10.1111/j.1365-2567.2008.02895.x] [Citation(s) in RCA: 111] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
There is a clear link between obesity and metabolic disorders; however, little is known about the effect of obesity on immune function, particularly during an infection. We have previously reported that diet-induced obese mice are more susceptible to morbidity and mortality during influenza infection than lean mice. Obese mice displayed aberrant innate immune responses characterized by minimal induction of interferon (IFN)-alpha/beta, delayed expression of pro-inflammatory cytokines and chemokines, and impaired natural killer cell cytotoxicity. To further examine the abnormal immune response of diet-induced obese mice, we analysed the cellularity of their lungs during influenza virus infection. We found delayed mononuclear cell entry with a marked decrease in dendritic cells (DCs) throughout the infection. Given the critical role of the DC in activating the cell-mediated immune response, we also analysed the functional capacity of DCs from obese mice. We found that, while obesity did not interfere with antigen uptake and migration, it did impair DC antigen presentation. This was probably attributable to an altered cytokine milieu, as interleukin (IL)-2, IL-12, and IL-6 were differentially regulated in the obese mice. Overall, this did not impact the total number of virus-specific CD8(+) T cells that were elicited, but did affect the number and frequency of CD3(+) and CD8(+) T cells in the lung. Thus, obesity interferes with cellular responses during influenza infection, leading to alterations in the T-cell population that ultimately may be detrimental to the host.
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Affiliation(s)
- Alexia G Smith
- Department of Nutrition, University of North Carolina, Chapel Hill, NC 27599-7461, USA
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30
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Shaikh SR, Mitchell D, Carroll E, Li M, Schneck J, Edidin M. Differential effects of a saturated and a monounsaturated fatty acid on MHC class I antigen presentation. Scand J Immunol 2008; 68:30-42. [PMID: 18533931 DOI: 10.1111/j.1365-3083.2008.02113.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Lipid overload, associated with metabolic disorders, occurs when fatty acids accumulate in non-adipose tissues. Cells of these tissues use major histocompatibility complex (MHC) class I molecules to present antigen to T cells in order to eliminate pathogens. As obesity is associated with impaired immune responses, we tested the hypothesis that the early stages of lipid overload with saturated fatty acids (SFA) alters MHC class I antigen presentation. Antigen presenting cells (APC) were treated with either the saturated palmitic acid (PA), abundant in the high fat Western diet, or the monounsaturated oleic acid (OA), a component of the Mediterranean diet. PA-treatment lowered APC lysis by activated cytotoxic T lymphocytes and inhibited APC ability to stimulate naïve T cells. Inhibition of immune responses with PA was due to a significant reduction in MHC class I surface expression, inhibition in the rate of APC-T-cell conjugation, and lowering of plasma membrane F-actin levels. OA-treatment had no effect on antigen presentation and upon exposure with PA, prevented the phenotypic effects of PA. OA-treatment conferred protection against changes in antigen presentation by accumulating fatty acids into triglyceride-rich lipid droplets of APC. Our findings establish for the first time a link between the early stages of lipid overload and antigen presentation and suggest that dietary SFA could impair immunity by affecting MHC I-mediated antigen presentation; this could be prevented, paradoxically, by accumulation of triglycerides rich in monounsaturated fatty acids.
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Affiliation(s)
- S R Shaikh
- Department of Biology, Johns Hopkins University, 3400 North Charles Street, Mudd Hall Room 45, Baltimore, MD 21218, USA.
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31
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Feeding our immune system: impact on metabolism. Clin Dev Immunol 2008; 2008:639803. [PMID: 18350123 PMCID: PMC2266987 DOI: 10.1155/2008/639803] [Citation(s) in RCA: 157] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2007] [Accepted: 01/09/2008] [Indexed: 02/07/2023]
Abstract
Endogenous intestinal microflora and environmental factors, such as diet, play a central role in immune homeostasis and reactivity. In addition, microflora and diet both influence body weight and insulin-resistance, notably through an action on adipose cells. Moreover, it is known since a long time that any disturbance in metabolism, like obesity, is associated with immune alteration, for example, inflammation. The purpose of this review is to provide an update on how nutrients-derived factors (mostly focusing on fatty acids and glucose) impact the innate and acquired immune systems, including the gut immune system and its associated bacterial flora. We will try to show the reader how the highly energy-demanding immune cells use glucose as a main source of fuel in a way similar to that of insulin-responsive adipose tissue and how Toll-like receptors (TLRs) of the innate immune system, which are found on immune cells, intestinal cells, and adipocytes, are presently viewed as essential actors in the complex balance ensuring bodily immune and metabolic health. Understanding more about these links will surely help to study and understand in a more fundamental way the common observation that eating healthy will keep you and your immune system healthy.
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32
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de Wilde J, Mohren R, van den Berg S, Boekschoten M, Dijk KWV, de Groot P, Müller M, Mariman E, Smit E. Short-term high fat-feeding results in morphological and metabolic adaptations in the skeletal muscle of C57BL/6J mice. Physiol Genomics 2008; 32:360-9. [DOI: 10.1152/physiolgenomics.00219.2007] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The prevalence of the metabolic syndrome (MS) is rapidly increasing all over the world. Consequently, there is an urgent need for more effective intervention strategies. Both animal and human studies indicate that lipid oversupply to skeletal muscle can result in insulin resistance, which is one of the characteristics of the MS. C57BL/6J mice were fed a low-fat (10 kcal%) palm oil diet or a high-fat (45 kcal%; HF) palm oil diet for 3 or 28 days. By combining transcriptomics with protein and lipid analyses we aimed to better understand the molecular events underlying the early onset of the MS. Short-term HF feeding led to altered expression levels of genes involved in a variety of biological processes including morphogenesis, energy metabolism, lipogenesis, and immune function. Protein analysis showed increased levels of the myosin heavy chain, slow fiber type protein, and the complexes I, II, III, IV, and V of the oxidative phosphorylation. Furthermore, we observed that the main mitochondrial membrane phospholipids, phosphatidylcholine and phosphatidylethanolamine, contained more saturated fatty acids. Altogether, these results point to a morphological as well as a metabolic adaptation by promoting a more oxidative fiber type. We hypothesize that after this early positive adaptation, a continued transcriptional downregulation of genes involved in oxidative phosphorylation will result in decreased oxidative capacity at a later stage. Together with increased saturation of phospholipids of the mitochondrial membrane this can result in decreased mitochondrial function, which is a hallmark observed in insulin resistance and Type 2 diabetes.
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Affiliation(s)
- Janneke de Wilde
- Nutrigenomics Consortium, Top Institute Food and Nutrition, Wageningen
- Nutrition and Toxicology Research Institute Maastricht (NUTRIM), Maastricht University, Maastricht
| | - Ronny Mohren
- Nutrigenomics Consortium, Top Institute Food and Nutrition, Wageningen
- Nutrition and Toxicology Research Institute Maastricht (NUTRIM), Maastricht University, Maastricht
| | - Sjoerd van den Berg
- Nutrigenomics Consortium, Top Institute Food and Nutrition, Wageningen
- Department of Endocrinology and Department of Human Genetics, Leiden University Medical Center, Leiden
| | - Mark Boekschoten
- Nutrigenomics Consortium, Top Institute Food and Nutrition, Wageningen
- Nutrition, Metabolism and Genomics Group, Wageningen University, Wageningen, the Netherlands
| | - Ko Willems-Van Dijk
- Nutrigenomics Consortium, Top Institute Food and Nutrition, Wageningen
- Department of Endocrinology and Department of Human Genetics, Leiden University Medical Center, Leiden
| | - Philip de Groot
- Nutrigenomics Consortium, Top Institute Food and Nutrition, Wageningen
- Nutrition, Metabolism and Genomics Group, Wageningen University, Wageningen, the Netherlands
| | - Michael Müller
- Nutrigenomics Consortium, Top Institute Food and Nutrition, Wageningen
- Nutrition, Metabolism and Genomics Group, Wageningen University, Wageningen, the Netherlands
| | - Edwin Mariman
- Nutrigenomics Consortium, Top Institute Food and Nutrition, Wageningen
- Nutrition and Toxicology Research Institute Maastricht (NUTRIM), Maastricht University, Maastricht
| | - Egbert Smit
- Nutrigenomics Consortium, Top Institute Food and Nutrition, Wageningen
- Nutrition and Toxicology Research Institute Maastricht (NUTRIM), Maastricht University, Maastricht
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33
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Miyazaki Y, Iwabuchi K, Iwata D, Miyazaki A, Kon Y, Niino M, Kikuchi S, Yanagawa Y, Kaer LV, Sasaki H, Onoé K. Effect of high fat diet on NKT cell function and NKT cell-mediated regulation of Th1 responses. Scand J Immunol 2008; 67:230-7. [PMID: 18226013 DOI: 10.1111/j.1365-3083.2007.02062.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Diet is one of the important factors that modulate immune responses. In the present study, we have examined the capacity of dietary lipids to modify immune responses in mice and we have investigated the contribution of glycolipid-reactive natural killer T (NKT) cells in this process. Mice fed, high fat diet (HFD; 21.2% fat, 0.20% cholesterol) for 3 weeks, as compared with mice fed standard fat diet (SFD; 4.3% fat, 0.03% cholesterol), showed significantly reduced interferon-gamma production in sera at 6 or 12 h after intraperitoneal injection of an NKT cell ligand, alpha-galactosylceramide. In contrast, production of interleukin-13 was significantly higher at 2 and 6 h in HFD fed mice compared with mice on SFD. No difference was detected in the serum interleukin-4 levels between these two groups of animals. The proportion of NKT cells in spleen and liver was reduced in mice fed HFD compared with those on SFD. In addition, activation of NKT cells assessed by up-regulation of CD69 was suppressed specifically in liver from mice fed HFD. Recall responses of conventional T cells and delayed-type hypersensitivity (Th1 type) against ovalbumin were significantly suppressed in mice fed HFD in comparison with those fed SFD. This suppression was not observed in CD1d-/- mice, suggesting that NKT cells in mice fed HFD played a role in suppressing Th1 responses. Taken together, our findings suggest a critical link between NKT cells, dietary lipid and adaptive immune responses.
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Affiliation(s)
- Y Miyazaki
- Division of Immunobiology, Research Section of Pathophysiology, Institute for Genetic Medicine, Hokkaido University, Japan
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