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Rasking L, Roelens C, Sprangers B, Thienpont B, Nawrot TS, De Vusser K. Lupus, DNA Methylation, and Air Pollution: A Malicious Triad. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:15050. [PMID: 36429769 PMCID: PMC9690025 DOI: 10.3390/ijerph192215050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 11/10/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
The pathogenesis of systemic lupus erythematosus (SLE) remains elusive to this day; however, genetic, epigenetic, and environmental factors have been implicated to be involved in disease pathogenesis. Recently, it was demonstrated that in systemic lupus erythematosus (SLE) patients, interferon-regulated genes are hypomethylated in naïve CD4+ T cells, CD19+ B lymphocytes, and CD14+ monocytes. This suggests that interferon-regulated genes may have been epigenetically poised in SLE patients for rapid expression upon stimulation by different environmental factors. Additionally, environmental studies have identified DNA (hypo)methylation changes as a potential mechanism of environmentally induced health effects in utero, during childhood and in adults. Finally, epidemiologic studies have firmly established air pollution as a crucial SLE risk factor, as studies showed an association between fine particulate matter (PM2.5) and traditional SLE biomarkers related to disease flare, hospital admissions, and an increased SLEDAI score. In this review, the relationship between aberrant epigenetic regulation, the environment, and the development of SLE will be discussed.
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Affiliation(s)
- Leen Rasking
- Centre for Environmental Sciences, Hasselt University, 3590 Diepenbeek, Belgium
| | - Céline Roelens
- Depatment of Nephrology and Kidney Transplantation, University Hospital Leuven, 3000 Leuven, Belgium
| | - Ben Sprangers
- Depatment of Nephrology and Kidney Transplantation, University Hospital Leuven, 3000 Leuven, Belgium
- Department of Microbiology and Immunology, Leuven University, 3000 Leuven, Belgium
| | - Bernard Thienpont
- Department of Human Genetics, Leuven University, 3000 Leuven, Belgium
| | - Tim S. Nawrot
- Centre for Environmental Sciences, Hasselt University, 3590 Diepenbeek, Belgium
- Department of Public Health and Primary Care, Environment and Health Unit, Leuven University, 3000 Leuven, Belgium
| | - Katrien De Vusser
- Depatment of Nephrology and Kidney Transplantation, University Hospital Leuven, 3000 Leuven, Belgium
- Department of Microbiology and Immunology, Leuven University, 3000 Leuven, Belgium
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2
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Robinson GA, Wilkinson MGL, Wincup C. The Role of Immunometabolism in the Pathogenesis of Systemic Lupus Erythematosus. Front Immunol 2022; 12:806560. [PMID: 35154082 PMCID: PMC8826250 DOI: 10.3389/fimmu.2021.806560] [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: 11/01/2021] [Accepted: 12/27/2021] [Indexed: 12/15/2022] Open
Abstract
Systemic lupus erythematosus (SLE) is a chronic autoimmune disorder in which pathogenic abnormalities within both the innate and adaptive immune response have been described. In order to activated, proliferate and maintain this immunological response a drastic upregulation in energy metabolism is required. Recently, a greater understanding of these changes in cellular bioenergetics have provided new insight into the links between immune response and the pathogenesis of a number of diseases, ranging from cancer to diabetes and multiple sclerosis. In this review, we highlight the latest understanding of the role of immunometabolism in SLE with particular focus on the role of abnormal mitochondrial function, lipid metabolism, and mTOR signaling in the immunological phenomenon observed in the SLE. We also consider what implications this has for future therapeutic options in the management of the disease in future.
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Affiliation(s)
- George Anthony Robinson
- Department of Rheumatology, Division of Medicine, University College London, London, United Kingdom.,Centre for Adolescent Rheumatology Versus Arthritis at University College London (UCL), University College London Hospital (UCLH) and Great Ormond Street Hospital (GOSH), University College London, London, United Kingdom
| | - Meredyth G Ll Wilkinson
- Centre for Adolescent Rheumatology Versus Arthritis at University College London (UCL), University College London Hospital (UCLH) and Great Ormond Street Hospital (GOSH), University College London, London, United Kingdom.,Department of Rheumatology, University College London Great Ormond Street Institute of Child Health, Infection, Immunity and Inflammation Research and Teaching Department, University College London, London, United Kingdom
| | - Chris Wincup
- Department of Rheumatology, Division of Medicine, University College London, London, United Kingdom.,Centre for Adolescent Rheumatology Versus Arthritis at University College London (UCL), University College London Hospital (UCLH) and Great Ormond Street Hospital (GOSH), University College London, London, United Kingdom
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3
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Wu H, Chang C, Lu Q. The Epigenetics of Lupus Erythematosus. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1253:185-207. [PMID: 32445096 DOI: 10.1007/978-981-15-3449-2_7] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Systemic lupus erythematosus (SLE) is a life-threatening autoimmune disease that is characterized by dysregulated dendritic cells, T and B cells, and abundant autoantibodies. The pathogenesis of lupus remains unclear. However, increasing evidence has shown that environment factors, genetic susceptibilities, and epigenetic regulation contribute to abnormalities in the immune system. In the past decades, several risk gene loci have been identified, such as MHC and C1q. However, genetics cannot explain the high discordance of lupus incidence in homozygous twins. Environmental factor-induced epigenetic modifications on immune cells may provide some insight. Epigenetics refers to inheritable changes in a chromosome without altering DNA sequence. The primary mechanisms of epigenetics include DNA methylation, histone modifications, and non-coding RNA regulations. Increasing evidence has shown the importance of dysregulated epigenetic modifications in immune cells in pathogenesis of lupus, and has identified epigenetic changes as potential biomarkers and therapeutic targets. Environmental factors, such as drugs, diet, and pollution, may also be the triggers of epigenetic changes. Therefore, this chapter will summarize the up-to-date progress on epigenetics regulation in lupus, in order to broaden our understanding of lupus and discuss the potential roles of epigenetic regulations for clinical applications.
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Affiliation(s)
- Haijing Wu
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Christopher Chang
- Division of Pediatric Immunology and Allergy, Joe DiMaggio Children's Hospital, Hollywood, FL, 33021, USA.,Division of Rheumatology, Allergy and Clinical Immunology, University of California Davis, Davis, CA, 95616, USA
| | - Qianjin Lu
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, Second Xiangya Hospital, Central South University, Changsha, Hunan, China.
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4
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The key culprit in the pathogenesis of systemic lupus erythematosus: Aberrant DNA methylation. Autoimmun Rev 2016; 15:684-9. [DOI: 10.1016/j.autrev.2016.03.002] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Accepted: 02/28/2016] [Indexed: 01/21/2023]
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5
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Immunoregulation of NKT Cells in Systemic Lupus Erythematosus. J Immunol Res 2015; 2015:206731. [PMID: 26819956 PMCID: PMC4706917 DOI: 10.1155/2015/206731] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 12/02/2015] [Indexed: 01/17/2023] Open
Abstract
Systemic lupus erythematosus (SLE) is a multisystem autoimmune disease with different variety of clinical manifestations. Natural killer T (NKT) cells are innate lymphocytes that play a regulatory role during broad range of immune responses. A number of studies demonstrated that the quantity and quality of invariant NKT (iNKT) cells showed marked defects in SLE patients in comparison to healthy controls. This finding suggests that iNKT cells may play a regulatory role in the occurrence and development of this disease. In this review, we mainly summarized the most recent findings about the behavior of NKT cells in SLE patients and mouse models, as well as how NKT cells affect the proportion of T helper cells and the production of autoreactive antibodies in the progress of SLE. This will help people better understand the role of NKT cells in the development of SLE and improve the therapy strategy.
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Wu M, Wang H, Shi J, Sun J, Duan Z, Li Y, Li J, Hu N, Wei Y, Chen Y, Hu Y. Gene expression profiles identify both MyD88-independent and MyD88-dependent pathways involved in the maturation of dendritic cells mediated by heparan sulfate: a novel adjuvant. Hum Vaccin Immunother 2015; 10:3711-21. [PMID: 25668674 DOI: 10.4161/21645515.2014.980682] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The traditional vaccine adjuvant research is mainly based on the trial and error method, and the mechanisms underlying the immune system stimulation remaining largely unknown. We previously demonstrated that heparan sulfate (HS), a TLR-4 ligand and endogenous danger signal, effectively enhanced humoral and cellular immune responses in mice immunized by HBsAg. This study aimed to evaluate whether HS induces better humoral immune responses against inactivated Hepatitis A or Rabies Vaccines, respectively, compared with traditional adjuvants (e.g. Alum and complete Freund's adjuvant). In order to investigate the molecular mechanisms of its adjuvanticity, the gene expression pattern of peripheral blood monocytes derived DCs (dendritic cells) stimulated with HS was analyzed at different times points. Total RNA was hybridized to Agilent SurePrint G3 Human Gene Expression 8×60 K one-color oligo-microarray. Through intersection analysis of the microarray results, we found that the Toll-like receptor signaling pathway was significantly activated, and NF-kB, TRAF3 and IRF7 were activated as early as 12 h, and MyD88 was activated at 48 h post-stimulation. Furthermore, the expression of the surface marker CD83 and the co-stimulatory molecules CD80 and CD86 was up-regulated as early as 24 h. Therefore, we speculated that HS-induced human monocyte-derived DC maturation may occur through both MyD88-independent and dependent pathways, but primarily through the former (TRIF pathway). These data provide an important basis for understanding the mechanisms underlying HS enhancement of the immune response.
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Key Words
- DCs, Dendritic cells
- DEGs, differentially expressed genes
- GO, Gene Ontology
- HAV, hepatitis A virus
- HBsAg, hepatitis B surface antigen
- HS, heparan sulfate
- IRF7, interferon regulatory factor 7
- KEGG, Kyoto Encyclopedia of Genes and Genomes
- MyD88, myeloid differentiation primary response 88
- NF-kB, nuclear factor-kappa B
- Rab/Vac, Rabies Vaccine
- TRAF3, TNF receptor-associated factor 3
- dendritic cells
- gene expression profile
- heparan sulfate
- humoral immune response
- toll-like receptor signaling pathway
- vaccine adjuvant
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Affiliation(s)
- Meini Wu
- a Institute of Medical Biology; Chinese Academy of Medical Sciences and Peking Union Medical College ; Kunming , China
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Wu H, Zhao M, Chang C, Lu Q. The real culprit in systemic lupus erythematosus: abnormal epigenetic regulation. Int J Mol Sci 2015; 16:11013-33. [PMID: 25988383 PMCID: PMC4463688 DOI: 10.3390/ijms160511013] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 05/08/2015] [Accepted: 05/11/2015] [Indexed: 02/01/2023] Open
Abstract
Systemic lupus erythematosus (SLE) is an autoimmune disease involving multiple organs and the presence of anti-nuclear antibodies. The pathogenesis of SLE has been intensively studied but remains far from clear. B and T lymphocyte abnormalities, dysregulation of apoptosis, defects in the clearance of apoptotic materials, and various genetic and epigenetic factors are attributed to the development of SLE. The latest research findings point to the association between abnormal epigenetic regulation and SLE, which has attracted considerable interest worldwide. It is the purpose of this review to present and discuss the relationship between aberrant epigenetic regulation and SLE, including DNA methylation, histone modifications and microRNAs in patients with SLE, the possible mechanisms of immune dysfunction caused by epigenetic changes, and to better understand the roles of aberrant epigenetic regulation in the initiation and development of SLE and to provide an insight into the related therapeutic options in SLE.
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Affiliation(s)
- Haijing Wu
- Department of Dermatology, Second Xiangya Hospital, Central South University, Hunan Key Laboratory of Medical Epigenomics, Changsha 410011, China.
| | - Ming Zhao
- Department of Dermatology, Second Xiangya Hospital, Central South University, Hunan Key Laboratory of Medical Epigenomics, Changsha 410011, China.
| | - Christopher Chang
- Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis, Davis, CA 95616, USA.
| | - Qianjin Lu
- Department of Dermatology, Second Xiangya Hospital, Central South University, Hunan Key Laboratory of Medical Epigenomics, Changsha 410011, China.
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8
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Land WG. The Role of Damage-Associated Molecular Patterns in Human Diseases: Part I - Promoting inflammation and immunity. Sultan Qaboos Univ Med J 2015; 15:e9-e21. [PMID: 25685392 PMCID: PMC4318613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Revised: 10/05/2014] [Accepted: 10/30/2014] [Indexed: 06/04/2023] Open
Abstract
There is increasing interest by physicians in the impact of the innate immune system on human diseases. In particular, the role of the molecules that initiate and amplify innate immune pathways, namely damage-associated molecular patterns (DAMPs), is of interest as these molecules are involved in the pathogenesis of many human disorders. The first part of this review identifies five classes of cell stress/tissue injury-induced DAMPs that are sensed by various recognition receptor-bearing cells of the innate immune system, thereby mounting inflammation, promoting apoptosis and shaping adaptive immune responses. The DAMPs activate and orchestrate several innate immune machineries, including inflammasomes and the unfolded protein response that synergistically operates to induce inflammatory, metabolic and adaptive immune pathologies. Two examples of autoimmune diseases are discussed as they represent a typical paradigm of the intimate interplay between innate and adaptive immune responses.
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Affiliation(s)
- Walter G Land
- Laboratoire d'ImmunoRhumatologie Moléculaire, INSERM UMR_S1109, LabEx Transplantex, Centre de Recherche d'Immunologie et d'Hématologie, Université de Strasbourg, Strasbourg, France, E-mail:
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9
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Wu HJ, Lo Y, Luk D, Lau CS, Lu L, Mok MY. Alternatively activated dendritic cells derived from systemic lupus erythematosus patients have tolerogenic phenotype and function. Clin Immunol 2014; 156:43-57. [PMID: 25463431 DOI: 10.1016/j.clim.2014.10.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2014] [Revised: 10/10/2014] [Accepted: 10/28/2014] [Indexed: 12/20/2022]
Abstract
Tolerogenic dendritic cells (DCs) are potential cell-based therapy in autoimmune diseases. In this study, we generated alternatively activated DCs (aaDCs) by treating monocyte-derived DCs from patients with systemic lupus erythematosus (SLE) and healthy subjects with combination of 1,25 dihydroxyvitamin D(3) (vitD3) and dexamethasone followed by lipopolysaccharide-induced maturation. Lupus aaDCs were found to acquire semi-mature phenotype that remained maturation-resistant to immunostimulants. They produced low level of IL-12 but high level of IL-10. They had attenuated allostimulatory effects on T cell activation and proliferation comparable to normal aaDCs and demonstrated differential immunomodulatory effects on naïve and memory T cells. These aaDCs were capable of inducing IL-10 producing regulatory T effectors from naïve T cells whereas they modulated cytokine profile with suppressed production of IFN-γ and IL-17 by co-cultured memory T cells with attenuated proliferation. These aaDCs were shown to be superior to those generated using vitD3 alone in lupus patients.
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Affiliation(s)
- Hai Jing Wu
- Division of Rheumatology & Clinical Immunology, Department of Medicine, University of Hong Kong, Hong Kong.
| | - Yi Lo
- Division of Rheumatology & Clinical Immunology, Department of Medicine, University of Hong Kong, Hong Kong.
| | - Daniel Luk
- Division of Rheumatology & Clinical Immunology, Department of Medicine, University of Hong Kong, Hong Kong.
| | - Chak Sing Lau
- Division of Rheumatology & Clinical Immunology, Department of Medicine, University of Hong Kong, Hong Kong.
| | - Liwei Lu
- Department of Pathology, University of Hong Kong, Hong Kong.
| | - Mo Yin Mok
- Division of Rheumatology & Clinical Immunology, Department of Medicine, University of Hong Kong, Hong Kong.
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10
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Ge W, Li D, Gao Y, Cao X. The Roles of Lysosomes in Inflammation and Autoimmune Diseases. Int Rev Immunol 2014; 34:415-31. [DOI: 10.3109/08830185.2014.936587] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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11
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Cuda CM, Misharin AV, Gierut AK, Saber R, Haines GK, Hutcheson J, Hedrick SM, Mohan C, Budinger GS, Stehlik C, Perlman H. Caspase-8 acts as a molecular rheostat to limit RIPK1- and MyD88-mediated dendritic cell activation. THE JOURNAL OF IMMUNOLOGY 2014; 192:5548-60. [PMID: 24808358 DOI: 10.4049/jimmunol.1400122] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Caspase-8, an executioner enzyme in the death receptor pathway, was shown to initiate apoptosis and suppress necroptosis. In this study, we identify a novel, cell death-independent role for caspase-8 in dendritic cells (DCs): DC-specific expression of caspase-8 prevents the onset of systemic autoimmunity. Failure to express caspase-8 has no effect on the lifespan of DCs but instead leads to an enhanced intrinsic activation and, subsequently, more mature and autoreactive lymphocytes. Uncontrolled TLR activation in a RIPK1-dependent manner is responsible for the enhanced functionality of caspase-8-deficient DCs, because deletion of the TLR-signaling mediator, MyD88, ameliorates systemic autoimmunity induced by caspase-8 deficiency. Taken together, these data demonstrate that caspase-8 functions in a cell type-specific manner and acts uniquely in DCs to maintain tolerance.
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Affiliation(s)
- Carla M Cuda
- Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611
| | - Alexander V Misharin
- Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611
| | - Angelica K Gierut
- Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611
| | - Rana Saber
- Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611
| | - G Kenneth Haines
- Department of Pathology, School of Medicine, Yale University, New Haven, CT 06510
| | - Jack Hutcheson
- Division of Rheumatology, Department of Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390
| | - Stephen M Hedrick
- Division of Biological Sciences, Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093; and
| | - Chandra Mohan
- Division of Rheumatology, Department of Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390
| | - G Scott Budinger
- Division of Pulmonary and Critical Care, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611
| | - Christian Stehlik
- Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611
| | - Harris Perlman
- Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611;
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12
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Look M, Saltzman WM, Craft J, Fahmy TM. The nanomaterial-dependent modulation of dendritic cells and its potential influence on therapeutic immunosuppression in lupus. Biomaterials 2013; 35:1089-95. [PMID: 24183697 DOI: 10.1016/j.biomaterials.2013.10.046] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2013] [Accepted: 10/15/2013] [Indexed: 10/26/2022]
Abstract
Targeting dendritic cells with nanoparticles is an attractive modality for instigating immunity or inducing immunosuppression. An important aspect of successful delivery of antigen and immune modulators to these cells is the efficacy of nanoparticle internalization, which can dictate the strength and robustness of immune responses; optimizing particulate uptake is thus key. We compared the internalization of two nanoparticulate platforms: a vesicular "nanogel" platform with a lipid exterior, and the widely-used solid biodegradable poly(lactic-co-glycolic acid) (PLGA) system. We found that nanogels were more effectively internalized by dendritic cells in vitro, as demonstrated by fluorescent tracer measurements. Additionally, the magnitude of dendritic cell immunosuppression achieved by nanogels loaded with mycophenolic acid, an immunosuppressant, was greater than similarly drug-loaded PLGA. Although both types of particles could mitigate the production of inflammatory cytokines and the up-regulation of stimulatory surface markers, nanogels yielded greater reductions. These in vitro measurements correlated with in vivo efficacy, where immunosuppressive therapy with nanogels extended the survival of lupus-prone NZB/W F1 mice whereas PLGA particles did not. Our results highlight the importance of material on nanoparticle uptake by dendritic cells, which impacts the quality of therapeutic immunosuppression.
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Affiliation(s)
- Michael Look
- Department of Biomedical Engineering, Yale University, New Haven, CT 06520, USA
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Gianchecchi E, Delfino DV, Fierabracci A. Recent insights on the putative role of autophagy in autoimmune diseases. Autoimmun Rev 2013; 13:231-41. [PMID: 24184881 DOI: 10.1016/j.autrev.2013.10.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 10/15/2013] [Indexed: 12/17/2022]
Abstract
The incidence of autoimmune pathologies is increasing worldwide. This has stimulated interest on their etiopathogenesis, caused by a complex interaction of genetic and environmental factors. With the advent of genome-wide linkage, candidate gene and genome wide association studies, risk polymorphisms in autophagy-related genes were discovered in several autoimmune conditions suggesting the possible contribution of autophagy to their etiopathogenesis. Autophagy represents the principal catabolic process mediated by lysosomes used by eukaryotic cells and is strictly regulated by proteins belonging to the Atg family. The function of autophagy has been well characterized in various tissues and systems, but its role in the regulation of innate and adaptive immune systems has been only recently discovered. It plays a fundamental role in the modulation of thymocyte selection and in the generation of T lymphocyte repertoire by participating in the intracellular antigen presentation on MHC class-II molecules by thymic epithelial cells. Furthermore, the generation of mice with knockout for specific autophagy-related genes induced several immunological alterations, including defects in B and T cell compartments and in T cell activation. In this review we report recent evidence on the role of autophagy in autoimmunity and discuss its relevance to the pathogenesis of these diseases. We finally highlight that future research may disclose potential new therapeutic targets for the treatment of this category of disorders by modulating the autophagic pathway.
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Affiliation(s)
- Elena Gianchecchi
- Autoimmunity Laboratory, Immunology Area, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Domenico Vittorio Delfino
- Section of Pharmacology, Toxicology and Chemotherapy, Department of Clinical and Experimental Medicine, Perugia University, Perugia, Italy
| | - Alessandra Fierabracci
- Autoimmunity Laboratory, Immunology Area, Bambino Gesù Children's Hospital IRCCS, Rome, Italy.
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14
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Starke C, Steinkasserer A, Voll RE, Zinser E. Soluble human CD83 ameliorates lupus in NZB/W F1 mice. Immunobiology 2013; 218:1411-5. [PMID: 23886695 DOI: 10.1016/j.imbio.2013.06.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 05/23/2013] [Accepted: 06/05/2013] [Indexed: 11/28/2022]
Abstract
In the present study we explored the immunomodulatory potential of prokaryotically expressed soluble CD83 in the treatment of murine lupus using the NZB/W F1 mouse model. Therefore female NZB/W F1 lupus mice were treated either with sCD83 or PBS for 4 weeks. sCD83 treated mice showed a significantly delayed onset of anti-dsDNA autoantibody production when compared with the control group. Importantly, during the treatment period with sCD83 none of the mice showed elevated levels of anti-dsDNA autoantibodies. In addition, NZB/W F1 mice which received sCD83 displayed lower concentrations of anti-histone IgG autoantibodies. Furthermore, there was no difference in total IgG antibodies, indicating a modulatory role for sCD83 in the production of self-reactive antibodies without decreasing total IgG. These results indicate that administration of sCD83 has profound immune-modulatory effects on the induction of autoantibodies in NZB/W F1 lupus mice and may thus be a promising approach to interfere with autoimmunity in SLE and other autoantibody-driven diseases.
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Affiliation(s)
- Charlotte Starke
- Department of Internal Medicine 3 and Institute of Clinical Immunology, Nikolaus-Fiebiger Center, University of Erlangen-Nuremberg, Erlangen, Germany; Department of Internal Medicine 3, University of Technology, Dresden, Germany
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15
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Hyperactivated MyD88 signaling in dendritic cells, through specific deletion of Lyn kinase, causes severe autoimmunity and inflammation. Proc Natl Acad Sci U S A 2013; 110:E3311-20. [PMID: 23940344 DOI: 10.1073/pnas.1300617110] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Deletion of lyn, a Src-family tyrosine kinase expressed by B, myeloid, and dendritic cells (DCs), triggers lupus-like disease in mice, characterized by autoantibody production and renal immune complex deposition leading to chronic glomerulonephritis. B cells from these mice are hyperactive to antigen-receptor stimulation owing to a loss of inhibitory signaling mediated by Lyn kinase. The hyperactive B-cell responses are thought to underlie the development of autoimmunity in this model. Lyn-deficient mice also manifest significant myeloexpansion. To test the contribution of different immune cell types to the lupus-like disease in this model, we generated a lyn(flox/flox) transgenic mouse strain. To our surprise, when we crossed these mice to Cd11c-cre animals, generating DC-specific deletion of Lyn, the animals developed spontaneous B- and T-cell activation and subsequent production of autoantibodies and severe nephritis. Remarkably, the DC-specific Lyn-deficient mice also developed severe tissue inflammatory disease, which was not present in the global lyn(-/-) strain. Lyn-deficient DCs were hyperactivated and hyperresponsive to Toll-like receptor agonists and IL-1β. To test whether dysregulation of these signaling pathways in DCs contributed to the inflammatory/autoimmune phenotype, we crossed the lyn(f/f) Cd11c-cre(+) mice to myd88(f/f) animals, generating double-mutant mice lacking both Lyn and the adaptor protein myeloid differentiation factor 88 (MyD88) in DCs, specifically. Deletion of MyD88 in DCs alone completely reversed the inflammatory autoimmunity in the DC-specific Lyn-mutant mice. Thus, we demonstrate that hyperactivation of MyD88-dependent signaling in DCs is sufficient to drive pathogenesis of lupus-like disease, illuminating the fact that dysregulation in innate immune cells alone can lead to autoimmunity.
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Gleisner MA, Reyes P, Alfaro J, Solanes P, Simon V, Crisostomo N, Sauma D, Rosemblatt M, Bono MR. Dendritic and stromal cells from the spleen of lupic mice present phenotypic and functional abnormalities. Mol Immunol 2013; 54:423-34. [DOI: 10.1016/j.molimm.2013.01.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Accepted: 01/21/2013] [Indexed: 01/18/2023]
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17
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Li BZ, Ye QL, Xu WD, Li JH, Ye DQ, Xu Y. GM-CSF alters dendritic cells in autoimmune diseases. Autoimmunity 2013; 46:409-18. [PMID: 23786272 DOI: 10.3109/08916934.2013.803533] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Autoimmune diseases arise from an inappropriate immune response against self components, including macromolecules, cells, tissues, organs etc. They are often triggered or accompanied by inflammation, during which the levels of granulocyte macrophage colony-stimulating factor (GM-CSF) are elevated. GM-CSF is an inflammatory cytokine that has profound impact on the differentiation of immune system cells of myeloid lineage, especially dendritic cells (DCs) that play critical roles in immune initiation and tolerance, and is involved in the pathogenesis of autoimmune diseases. Although GM-CSF was discovered decades ago, recent studies with some new findings have shed an interesting light on the old hematopoietic growth factor. In the inflammatory autoimmune diseases, GM-CSF redirects the normal developmental pathway of DCs, conditions their antigen presentation capacities and endows them with unique cytokine signatures to affect autoimmune responses. Here we review the latest advances in the field, with the aim of demonstrating the effects of GM-CSF on DCs and their influences on autoimmune diseases. The summarized knowledge will help to design DC-based strategies for the treatment of autoimmune diseases.
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Affiliation(s)
- Bao-Zhu Li
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University , Anhui , PR China
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Khan SA, Nowatzky J, Jiménez-Branda S, Greenberg JD, Clancy R, Buyon J, Bhardwaj N. Active systemic lupus erythematosus is associated with decreased blood conventional dendritic cells. Exp Mol Pathol 2013; 95:121-123. [PMID: 23773850 DOI: 10.1016/j.yexmp.2013.06.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Accepted: 06/06/2013] [Indexed: 10/26/2022]
Abstract
OBJECTIVE The aim of the study is to determine the frequency and functionality of blood conventional dendritic cells (cDCs) in relation to disease activity in systemic lupus erythematosus. METHODS Blood cDCs were enumerated for 34 SLE patients, defined as "active" (SLEDAI ≥ 4) or "inactive" (SLEDAI < 4), 26 RA subjects and 8 healthy subjects by FACS. cDC activation was measured by IL-12p40/70 staining following resiquimod stimulation. RESULTS The frequency of blood cDCs was significantly lower in active compared to inactive patients, however, with comparable cDC functionality. CONCLUSION cDC frequency in active SLE is decreased with no perturbation in cDC function, possibly due to enhanced turnover and/or tissue-specific migration.
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Affiliation(s)
- Shaukat Ali Khan
- New York University School of Medicine, Cancer Institute, Smilow Research Building 1303, 522 First Avenue, New York, NY 10016, U.S.A
| | - Johannes Nowatzky
- New York University School of Medicine, Cancer Institute, Smilow Research Building 1303, 522 First Avenue, New York, NY 10016, U.S.A.,New York University School of Medicine, Department of Medicine, Division of Rheumatology, NYU Hospital for Joint Diseases, 301 E 17th Street, New York, NY 10003, U.S.A
| | - Sonia Jiménez-Branda
- New York University School of Medicine, Cancer Institute, Smilow Research Building 1303, 522 First Avenue, New York, NY 10016, U.S.A
| | - Jeffrey David Greenberg
- New York University School of Medicine, Department of Medicine, Division of Rheumatology, NYU Hospital for Joint Diseases, 301 E 17th Street, New York, NY 10003, U.S.A
| | - Robert Clancy
- New York University School of Medicine, Department of Medicine, Division of Rheumatology, NYU Hospital for Joint Diseases, 301 E 17th Street, New York, NY 10003, U.S.A
| | - Jill Buyon
- New York University School of Medicine, Department of Medicine, Division of Rheumatology, NYU Hospital for Joint Diseases, 301 E 17th Street, New York, NY 10003, U.S.A
| | - Nina Bhardwaj
- New York University School of Medicine, Cancer Institute, Smilow Research Building 1303, 522 First Avenue, New York, NY 10016, U.S.A
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Systemic lupus erythematosus. Clin Immunol 2013. [DOI: 10.1016/b978-0-7234-3691-1.00064-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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20
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Chan VSF, Nie YJ, Shen N, Yan S, Mok MY, Lau CS. Distinct roles of myeloid and plasmacytoid dendritic cells in systemic lupus erythematosus. Autoimmun Rev 2012; 11:890-7. [DOI: 10.1016/j.autrev.2012.03.004] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Accepted: 03/11/2012] [Indexed: 01/12/2023]
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21
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Caza TN, Talaber G, Perl A. Metabolic regulation of organelle homeostasis in lupus T cells. Clin Immunol 2012; 144:200-13. [PMID: 22836085 PMCID: PMC3423541 DOI: 10.1016/j.clim.2012.07.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Accepted: 07/03/2012] [Indexed: 12/23/2022]
Abstract
Abnormal T-cell signaling and activation are characteristic features in systemic lupus erythematosus (SLE). Lupus T cells are shifted toward an over-activated state, important signaling pathways are rewired, and signaling molecules are replaced. Disturbances in metabolic and organelle homeostasis, importantly within the mitochondrial, endosomal, and autophagosomal compartments, underlie the changes in signal transduction. Mitochondrial hyperpolarization, enhanced endosomal recycling, and dysregulated autophagy are hallmarks of pathologic organelle homeostasis in SLE. This review is focused on the metabolic checkpoints of endosomal traffic that control immunological synapse formation and mitophagy and may thus serve as targets for treatment in SLE.
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Affiliation(s)
- Tiffany N Caza
- Department of Medicine, State University of New York Upstate Medical University, Syracuse, 13210, USA
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23
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Cunningham MA, Naga OS, Eudaly JG, Scott JL, Gilkeson GS. Estrogen receptor alpha modulates Toll-like receptor signaling in murine lupus. Clin Immunol 2012; 144:1-12. [PMID: 22659029 DOI: 10.1016/j.clim.2012.04.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2012] [Revised: 04/09/2012] [Accepted: 04/10/2012] [Indexed: 01/06/2023]
Abstract
Systemic lupus erythematosus (SLE) is a disease that disproportionately affects females. Despite significant research effort, the mechanisms underlying the female predominance in this disease are largely unknown. Previously, we showed that estrogen receptor alpha knockout (ERαKO) lupus prone female mice had significantly less pathologic renal disease and proteinuria, and significantly prolonged survival. Since autoantibody levels and number and percentage of B/T cells were not significantly impacted by ERα genotype, we hypothesized that the primary benefit of ERα deficiency in lupus nephritis was via modulation of the innate immune response. Using BMDCs and spleen cells/B cells from female wild-type or ERαKO mice, we found that ERαKO-derived cells have a significantly reduced inflammatory response after stimulation with TLR agonists. Our results indicate that the inflammatory response to TLR ligands is significantly impacted by the presence of ERα despite the absence of estradiol, and may partially explain the protective effect of ERα deficiency in lupus-prone animals.
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Affiliation(s)
- Melissa A Cunningham
- Medical University of South Carolina, Division of Rheumatology and Immunology and Ralph H. Johnson Veterans Affairs Hospital, Charleston, SC 29425, USA
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24
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Crispín JC, Vargas-Rojas MI, Monsiváis-Urenda A, Alcocer-Varela J. Phenotype and function of dendritic cells of patients with systemic lupus erythematosus. Clin Immunol 2012; 143:45-50. [DOI: 10.1016/j.clim.2011.12.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Revised: 11/30/2011] [Accepted: 12/02/2011] [Indexed: 12/21/2022]
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25
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Fu J, Zhang A, Ju X. Tolerogenic dendritic cells as a target for the therapy of immune thrombocytopenia. Clin Appl Thromb Hemost 2012; 18:469-75. [PMID: 22387587 DOI: 10.1177/1076029612438612] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Immune thrombocytopenia (ITP) is an autoimmune disease in which platelets are destroyed by special antiplatelet autoantibodies produced by B cells. Dendritic cells (DCs) are professional antigen-presenting cells involved in humoral immunity and cellular immunity and among them DCs that induce autoimmune tolerance are called tolerogenic DCs (tDCs). As a promising immunotherapeutic strategy for ITP, tDCs have received increasing attention. In this review, we describe the significant role of DCs in regulating autoimmune balances, introduce the manipulation strategies to generate tDCs, summarize recent progress on the experimental application of tDCs for ITP therapy, and finally discuss the perspectives of tolerogenic vaccination for ITP treatment in the clinic.
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Affiliation(s)
- Jinqiu Fu
- Shandong University, Shandong, China
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26
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Apostolidis SA, Lieberman LA, Kis-Toth K, Crispín JC, Tsokos GC. The dysregulation of cytokine networks in systemic lupus erythematosus. J Interferon Cytokine Res 2011; 31:769-79. [PMID: 21877904 PMCID: PMC3189553 DOI: 10.1089/jir.2011.0029] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Accepted: 06/16/2011] [Indexed: 12/18/2022] Open
Abstract
Systemic lupus erythematosus (SLE) is an autoimmune disease associated with chronic immune activation and tissue damage. Organ damage in SLE results from the deposition of immune complexes and the infiltration of activated T cells into susceptible organs. Cytokines are intimately involved in every step of the SLE pathogenesis. Defective immune regulation and uncontrolled lymphocyte activation, as well as increased antigen presenting cell maturation are all influenced by cytokines. Moreover, expansion of local immune responses as well as tissue infiltration by pathogenic cells is instigated by cytokines. In this review, we describe the main cytokine abnormalities reported in SLE and discuss the mechanisms that drive their aberrant production as well as the pathogenic pathways that their presence promotes.
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Affiliation(s)
- Sokratis A Apostolidis
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02115, USA
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