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Probing the Skin–Brain Axis: New Vistas Using Mouse Models. Int J Mol Sci 2022; 23:ijms23137484. [PMID: 35806489 PMCID: PMC9267936 DOI: 10.3390/ijms23137484] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/01/2022] [Accepted: 07/04/2022] [Indexed: 12/10/2022] Open
Abstract
Inflammatory diseases of the skin, including atopic dermatitis and psoriasis, have gained increasing attention with rising incidences in developed countries over the past decades. While bodily properties, such as immunological responses of the skin, have been described in some detail, interactions with the brain via different routes are less well studied. The suggested routes of the skin–brain axis comprise the immune system, HPA axis, and the peripheral and central nervous system, including microglia responses and structural changes. They provide starting points to investigate the molecular mechanisms of neuropsychiatric comorbidities in AD and psoriasis. To this end, mouse models exist for AD and psoriasis that could be tested for relevant behavioral entities. In this review, we provide an overview of the current mouse models and assays. By combining an extensive behavioral characterization and state-of-the-art genetic interventions with the investigation of underlying molecular pathways, insights into the mechanisms of the skin–brain axis in inflammatory cutaneous diseases are examined, which will spark further research in humans and drive the development of novel therapeutic strategies.
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Martínez BA, Shrotri S, Kingsmore KM, Bachali P, Grammer AC, Lipsky PE. Machine learning reveals distinct gene signature profiles in lesional and nonlesional regions of inflammatory skin diseases. SCIENCE ADVANCES 2022; 8:eabn4776. [PMID: 35486723 PMCID: PMC9054015 DOI: 10.1126/sciadv.abn4776] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Analysis of gene expression from cutaneous lupus erythematosus, psoriasis, atopic dermatitis, and systemic sclerosis using gene set variation analysis (GSVA) revealed that lesional samples from each condition had unique features, but all four diseases displayed common enrichment in multiple inflammatory signatures. These findings were confirmed by both classification and regression tree analysis and machine learning (ML) models. Nonlesional samples from each disease also differed from normal samples and each other by ML. Notably, the features used in classification of nonlesional disease were more distinct than their lesional counterparts, and GSVA confirmed unique features of nonlesional disease. These data show that lesional and nonlesional skin samples from inflammatory skin diseases have unique profiles of gene expression abnormalities, especially in nonlesional skin, and suggest a model in which disease-specific abnormalities in "prelesional" skin may permit environmental stimuli to trigger inflammatory responses leading to both the unique and shared manifestations of each disease.
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3
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The Role of Interleukins in the Pathogenesis of Dermatological Immune-Mediated Diseases. Adv Ther 2022; 39:4474-4508. [PMID: 35997892 PMCID: PMC9395905 DOI: 10.1007/s12325-022-02241-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 06/22/2022] [Indexed: 01/30/2023]
Abstract
Autoimmune inflammatory diseases are primarily characterized by deregulated expression of cytokines, which drive pathogenesis of these diseases. A number of approved and experimental therapies utilize monoclonal antibodies against cytokine proteins. Cytokines can be classified into different families including the interleukins, which are secreted and act on leukocytes, the tumor necrosis factor (TNF) family, as well as chemokine proteins. In this review article, we focus on the interleukin family of cytokines, of which 39 members have been identified to this date. We outline the role of each of these interleukins in the immune system, and various dermatological inflammatory diseases with a focused discussion on the pathogenesis of psoriasis and atopic dermatitis. In addition, we describe the roles of various interleukins in psychiatric, cardiovascular, and gastrointestinal comorbidities. Finally, we review clinical efficacy and safety data from emerging late-phase anti-interleukin therapies under development for psoriasis and atopic dermatitis. Collectively, additional fundamental and clinical research remains necessary to fully elucidate the roles of various interleukin proteins in the pathogenesis of inflammatory dermatologic diseases, and treatment outcomes in patients.
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Zheng T, Fan M, Wei Y, Feng J, Zhou P, Sun X, Xue A, Qin CX, Yu D. Huangbai Liniment Ameliorates Skin Inflammation in Atopic Dermatitis. Front Pharmacol 2021; 12:726035. [PMID: 34531749 PMCID: PMC8438128 DOI: 10.3389/fphar.2021.726035] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 08/19/2021] [Indexed: 12/29/2022] Open
Abstract
Atopic dermatitis (AD), also known as atopic eczema, is one of the most common skin diseases and is characterized by allergic skin inflammation, redness, and itchiness and is associated with a hyperactivated type 2 immune response. The leading causes of AD include an imbalance in the immune system, genetic predisposition, or environmental factors, making the development of effective pharmacotherapies complex. Steroids are widely used to treat AD; however, they provide limited efficacy in the long term and can lead to adverse effects. Thus, novel treatments that offer durable efficacy and fewer side effects are urgently needed. Here, we investigated the therapeutic potential of Huangbai Liniment (HB), a traditional Chinese medicine, using an experimental AD mouse model, following our clinical observations of AD patients. In both AD patient and the mouse disease model, HB significantly improved the disease condition. Specifically, patients who received HB treatment on local skin lesions (3–4 times/day) showed improved resolution of inflammation. Using the 1-Chloro-2,4-dinitrobenzene (DNCB)-induced AD model in BALB/c mice, we observed that HB profoundly alleviated severe skin inflammation and relieved the itching. The dermatopathological results showed markedly reversed skin inflammation with decreased epidermal thickness and overall cellularity. Correspondingly, HB treatment largely decreased the mRNA expression of proinflammatory cytokines, including IL-1β, TNF-α, IL-17, IL-4, and IL-13, associated with declined gene expression of IL-33, ST2, and GATA3, which are connected to the type 2 immune response. In addition, HB restored immune tolerance by promoting regulatory T (TREG) cells and inhibiting the generation of TH1, TH2, and TH17 cells in vitro and in the DNCB-induced AD mouse model. For the first time, we demonstrate that HB markedly mitigates skin inflammation in AD patients and the DNCB-induced AD mouse model by reinvigorating the T cell immune balance, shedding light on the future development and application of novel HB-based therapeutics for AD.
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Affiliation(s)
- Ting Zheng
- Shandong Analysis and Test Center, Laboratory of Immunology for Environment and Health, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China.,School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Miao Fan
- School of Pharmaceutical Science, Shandong University, Jinan, China
| | - Yunbo Wei
- Shandong Analysis and Test Center, Laboratory of Immunology for Environment and Health, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China.,School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Jinhong Feng
- Shandong Analysis and Test Center, Laboratory of Immunology for Environment and Health, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China.,School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Pengcheng Zhou
- The University of Queensland Diamantina Institute, Translational Research Institute, Brisbane, QLD, Australia
| | - Xin Sun
- School of Food Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Anqi Xue
- Shandong Analysis and Test Center, Laboratory of Immunology for Environment and Health, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China.,School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Cheng Xue Qin
- School of Pharmaceutical Science, Shandong University, Jinan, China.,Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Melbourne, VIC, Australia
| | - Di Yu
- Shandong Analysis and Test Center, Laboratory of Immunology for Environment and Health, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China.,The University of Queensland Diamantina Institute, Translational Research Institute, Brisbane, QLD, Australia
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5
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Soliai M, Sundaresan AS, Morin A, Hirsch AG, Stanhope C, Kuiper J, Schwartz BS, Ober C, Pinto JM. Two-stage genome-wide association study of chronic rhinosinusitis and disease subphenotypes highlights mucosal immunity contributing to risk. Int Forum Allergy Rhinol 2021; 11:814-817. [PMID: 33393196 PMCID: PMC8048969 DOI: 10.1002/alr.22731] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 10/19/2020] [Accepted: 10/19/2020] [Indexed: 11/07/2022]
Affiliation(s)
- Marcus Soliai
- Department of Human GeneticsUniversity of ChicagoChicagoIL
| | | | | | | | | | - Jordan Kuiper
- Department of Environmental Health and EngineeringJohns Hopkins Bloomberg School of Public HealthBaltimoreMD
| | - Brian S. Schwartz
- Department of Population Health SciencesGeisingerDanvillePA
- Department of Environmental Health and EngineeringJohns Hopkins Bloomberg School of Public HealthBaltimoreMD
| | - Carole Ober
- Department of Human GeneticsUniversity of ChicagoChicagoIL
| | - Jayant M. Pinto
- Section of Otolaryngology‒Head and Neck SurgeryDepartment of SurgeryUniversity of ChicagoChicagoIL
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6
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Ah Kioon MD, Pierides M, Pannellini T, Lin G, Nathan CF, Barrat FJ. Noncytotoxic Inhibition of the Immunoproteasome Regulates Human Immune Cells In Vitro and Suppresses Cutaneous Inflammation in the Mouse. THE JOURNAL OF IMMUNOLOGY 2021; 206:1631-1641. [PMID: 33674446 DOI: 10.4049/jimmunol.2000951] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 01/27/2021] [Indexed: 12/15/2022]
Abstract
Inhibitors of the immunoproteasome (i-20S) have shown promise in mouse models of autoimmune diseases and allograft rejection. In this study, we used a novel inhibitor of the immunoproteasome, PKS3053, that is reversible, noncovalent, tight-binding, and highly selective for the β5i subunit of the i-20S to evaluate the role that i-20S plays in regulating immune responses in vitro and in vivo. In contrast to irreversible, less-selective inhibitors, PKS3053 did not kill any of the primary human cell types tested, including plasmacytoid dendritic cells, conventional dendritic cells, macrophages, and T cells, all of which expressed genes encoding both the constitutive proteasome (c-20S) and i-20S. PKS3053 reduced TLR-dependent activation of plasmacytoid dendritic cells, decreasing their maturation and IFN-α response and reducing their ability to activate allogenic T cells. In addition, PKS3053 reduced T cell proliferation directly and inhibited TLR-mediated activation of conventional dendritic cells and macrophages. In a mouse model of skin injury that shares some features of cutaneous lupus erythematosus, blocking i-20S decreased inflammation, cellular infiltration, and tissue damage. We conclude that the immunoproteasome is involved in the activation of innate and adaptive immune cells, that their activation can be suppressed with an i-20S inhibitor without killing them, and that selective inhibition of β5i holds promise as a potential therapy for inflammatory skin diseases such as psoriasis, cutaneous lupus erythematosus, and systemic sclerosis.
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Affiliation(s)
- Marie Dominique Ah Kioon
- Autoimmunity and Inflammation Program, Research Institute, Hospital for Special Surgery, New York, NY 10021; and
| | - Michael Pierides
- Autoimmunity and Inflammation Program, Research Institute, Hospital for Special Surgery, New York, NY 10021; and
| | - Tania Pannellini
- Autoimmunity and Inflammation Program, Research Institute, Hospital for Special Surgery, New York, NY 10021; and
| | - Gang Lin
- Department of Microbiology and Immunology, Weill Cornell Medical College, Cornell University, New York, NY 10021
| | - Carl F Nathan
- Department of Microbiology and Immunology, Weill Cornell Medical College, Cornell University, New York, NY 10021
| | - Franck J Barrat
- Autoimmunity and Inflammation Program, Research Institute, Hospital for Special Surgery, New York, NY 10021; and .,Department of Microbiology and Immunology, Weill Cornell Medical College, Cornell University, New York, NY 10021
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7
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Altered Levels of Sphingosine, Sphinganine and Their Ceramides in Atopic Dermatitis Are Related to Skin Barrier Function, Disease Severity and Local Cytokine Milieu. Int J Mol Sci 2020; 21:ijms21061958. [PMID: 32183011 PMCID: PMC7139865 DOI: 10.3390/ijms21061958] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 03/07/2020] [Accepted: 03/09/2020] [Indexed: 12/21/2022] Open
Abstract
Dysfunctional skin barrier plays a key role in the pathophysiology of atopic dermatitis (AD), a common inflammatory skin disease. Altered composition of ceramides is regarded as a major cause of skin barrier dysfunction, however it is not clear whether these changes are intrinsic or initiated by inflammation and aberrant immune response in AD. This study investigated the levels of free sphingoid bases (SBs) sphingosine and sphinganine and their ceramides and glucosylceramide in the stratum corneum (SC) and related them to skin barrier function, disease severity and local cytokine milieu. Ceramides were measured in healthy skin, and lesional and non-lesional skin of AD patients by a novel method based on deacylation of ceramides which were subsequently determined as corresponding sphingoid bases by using liquid chromatography–tandem mass spectrometry (LC–MS/MS). The cytokine levels were determined by multiplex immunoassay. Atopic skin showed increased levels of most investigated markers, predominantly in lesional skin. The largest difference in respect to healthy skin was found for glucosylceramide with respective median values of 0.23 (IQR 0.18–0.61), 0.56 (IQR 0.32–0.76) and 19.32 (IQR 7.86–27.62) pmol/µg protein for healthy, non-lesional and lesional skin. The levels of investigated ceramide markers were correlated with disease severity (scoring atopic dermatitis, SCORAD) and skin barrier function (trans-epidermal water loss, TEWL) and furthermore with cytokines involved in innate, Th-1, and Th-2 immune response. Interestingly, the strongest association with SCORAD was found for sphinganine/sphingosine ratio (r = ‒0.69, p < 0.001; non-lesional skin), emphasizing the importance of SBs in AD. The highest correlation with TEWL was found for glucosylceramide (r2 = 0.60, p < 0.001), which was investigated for the first time in AD. Findings that the changes in SBs and ceramide levels were predominant in lesional skin and their association with disease severity and cytokine levels suggest an immune-system driven effect. A novel analysis method demonstrates a robust and simple approach that might facilitate wider use of lipid biomarkers in the clinics e.g., to monitor (immune) therapy or dissect disease endotypes.
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Chandrasekhar JL, Cox KM, Loo WM, Qiao H, Tung KS, Erickson LD. Cutaneous Exposure to Clinically Relevant Lone Star Ticks Promotes IgE Production and Hypersensitivity through CD4 + T Cell- and MyD88-Dependent Pathways in Mice. THE JOURNAL OF IMMUNOLOGY 2019; 203:813-824. [PMID: 31270149 DOI: 10.4049/jimmunol.1801156] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 06/17/2019] [Indexed: 01/10/2023]
Abstract
Tick-borne allergies are a growing public health concern and have been associated with the induction of IgE-mediated food allergy to red meat. However, despite the increasing prevalence of tick bite-induced allergies, the mechanisms by which cutaneous exposure to ticks leads to sensitization and the production of IgE Abs are poorly understood. To address this question, an in vivo approach was used to characterize the IgE response to lone star tick proteins administered through the skin of mice. The results demonstrated that tick sensitization and challenge induced a robust production of IgE Abs and supported a role for IgE-mediated hypersensitivity reactions in sensitized animals following oral administration of meat. The induction of IgE responses was dependent on cognate CD4+ T cell help during both the sensitization phase and challenge phase with cutaneous tick exposure. In addition, IgE production was dependent on B cell-intrinsic MyD88 expression, suggesting an important role for TLR signaling in B cells to induce IgE responses to tick proteins. This model of tick-induced IgE responses could be used to study the factors within tick bites that cause allergies and to investigate how sensitization to food Ags occurs through the skin that leads to IgE production.
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Affiliation(s)
- Jessica L Chandrasekhar
- Beirne B. Carter Center for Immunology Research, University of Virginia School of Medicine, Charlottesville, VA 22908
| | - Kelly M Cox
- Beirne B. Carter Center for Immunology Research, University of Virginia School of Medicine, Charlottesville, VA 22908.,Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine, Charlottesville, VA 22908; and
| | - William M Loo
- Beirne B. Carter Center for Immunology Research, University of Virginia School of Medicine, Charlottesville, VA 22908
| | - Hui Qiao
- Beirne B. Carter Center for Immunology Research, University of Virginia School of Medicine, Charlottesville, VA 22908
| | - Kenneth S Tung
- Beirne B. Carter Center for Immunology Research, University of Virginia School of Medicine, Charlottesville, VA 22908.,Department of Pathology, University of Virginia School of Medicine, Charlottesville, VA 22908
| | - Loren D Erickson
- Beirne B. Carter Center for Immunology Research, University of Virginia School of Medicine, Charlottesville, VA 22908; .,Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine, Charlottesville, VA 22908; and
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9
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Mathur AN, Zirak B, Boothby IC, Tan M, Cohen JN, Mauro TM, Mehta P, Lowe MM, Abbas AK, Ali N, Rosenblum MD. Treg-Cell Control of a CXCL5-IL-17 Inflammatory Axis Promotes Hair-Follicle-Stem-Cell Differentiation During Skin-Barrier Repair. Immunity 2019; 50:655-667.e4. [PMID: 30893588 PMCID: PMC6507428 DOI: 10.1016/j.immuni.2019.02.013] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 11/16/2018] [Accepted: 02/14/2019] [Indexed: 12/11/2022]
Abstract
Restoration of barrier-tissue integrity after injury is dependent on the function of immune cells and stem cells (SCs) residing in the tissue. In response to skin injury, hair-follicle stem cells (HFSCs), normally poised for hair generation, are recruited to the site of injury and differentiate into cells that repair damaged epithelium. We used a SC fate-mapping approach to examine the contribution of regulatory T (Treg) cells to epidermal-barrier repair after injury. Depletion of Treg cells impaired skin-barrier regeneration and was associated with a Th17 inflammatory response and failed HFSC differentiation. In this setting, damaged epithelial cells preferentially expressed the neutrophil chemoattractant CXCL5, and blockade of CXCL5 or neutrophil depletion restored barrier function and SC differentiation after epidermal injury. Thus, Treg-cell regulation of localized inflammation enables HFSC differentiation and, thereby, skin-barrier regeneration, with implications for the maintenance and repair of other barrier tissues.
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Affiliation(s)
- Anubhav N Mathur
- Department of Dermatology, University of California, San Francisco, CA, USA
| | - Bahar Zirak
- Department of Dermatology, University of California, San Francisco, CA, USA
| | - Ian C Boothby
- Department of Dermatology, University of California, San Francisco, CA, USA
| | - Madge Tan
- Department of Dermatology, University of California, San Francisco, CA, USA
| | - Jarish N Cohen
- Department of Dermatology, University of California, San Francisco, CA, USA
| | - Thea M Mauro
- Department of Dermatology, University of California, San Francisco, CA, USA
| | - Pooja Mehta
- Department of Dermatology, University of California, San Francisco, CA, USA
| | - Margaret M Lowe
- Department of Dermatology, University of California, San Francisco, CA, USA
| | - Abul K Abbas
- Department of Pathology, University of California, San Francisco, CA, USA
| | - Niwa Ali
- Department of Dermatology, University of California, San Francisco, CA, USA
| | - Michael D Rosenblum
- Department of Dermatology, University of California, San Francisco, CA, USA.
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Leyva-Castillo JM, Yoon J, Geha RS. IL-22 promotes allergic airway inflammation in epicutaneously sensitized mice. J Allergy Clin Immunol 2019; 143:619-630.e7. [PMID: 29920352 PMCID: PMC6298864 DOI: 10.1016/j.jaci.2018.05.032] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 04/09/2018] [Accepted: 05/29/2018] [Indexed: 11/24/2022]
Abstract
BACKGROUND Serum IL-22 levels are increased in patients with atopic dermatitis, which commonly precedes asthma in the atopic march. Epicutaneous sensitization in mice results in TH2-dominated skin inflammation that mimics atopic dermatitis and sensitizes the airways for antigen challenge-induced allergic inflammation characterized by the presence of both eosinophils and neutrophils. Epicutaneous sensitization results in increased serum levels of IL-22. OBJECTIVE We sought to determine the role of IL-22 in antigen-driven airway allergic inflammation after inhalation challenge in epicutaneously sensitized mice. METHODS Wild-type (WT) and Il22-/- mice were sensitized epicutaneously or immunized intraperitoneally with ovalbumin (OVA) and challenged intranasally with antigen. OVA T-cell receptor-specific T cells were TH22 polarized in vitro. Airway inflammation, mRNA levels in the lungs, and airway hyperresponsiveness (AHR) were examined. RESULTS Epicutaneous sensitization preferentially elicited an IL-22 response compared with intraperitoneal immunization. Intranasal challenge of mice epicutaneously sensitized with OVA elicited in the lungs Il22 mRNA expression, IL-22 production, and accumulation of CD3+CD4+IL-22+ T cells that coexpressed IL-17A and TNF-α. Epicutaneously sensitized Il22-/- mice exhibited diminished eosinophil and neutrophil airway infiltration and decreased AHR after intranasal OVA challenge. Production of IL-13, IL-17A, and TNF-α was normal, but IFN-γ production was increased in lung cells from airway-challenged and epicutaneously sensitized Il22-/- mice. Intranasal instillation of IFN-γ-neutralizing antibody partially reversed the defect in eosinophil recruitment. WT recipients of TH22-polarized WT, but not IL-22-deficient, T-cell receptor OVA-specific T cells, which secrete both IL-17A and TNF-α, had neutrophil-dominated airway inflammation and AHR on intranasal OVA challenge. Intranasal instillation of IL-22 with TNF-α, but not IL-17A, elicited neutrophil-dominated airway inflammation and AHR in WT mice, suggesting that loss of IL-22 synergy with TNF-α contributed to defective recruitment of neutrophils into the airways of Il22-/- mice. TNF-α, but not IL-22, blockade at the time of antigen inhalation challenge inhibited airway inflammation in epicutaneously sensitized mice. CONCLUSION Epicutaneous sensitization promotes generation of antigen-specific IL-22-producing T cells that promote airway inflammation and AHR after antigen challenge, suggesting that IL-22 plays an important role in the atopic march.
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Affiliation(s)
- Juan Manuel Leyva-Castillo
- Division of Immunology, Children's Hospital and Department of Pediatrics, Harvard Medical School, Boston, Mass
| | - Juhan Yoon
- Division of Immunology, Children's Hospital and Department of Pediatrics, Harvard Medical School, Boston, Mass
| | - Raif S Geha
- Division of Immunology, Children's Hospital and Department of Pediatrics, Harvard Medical School, Boston, Mass.
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11
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Kim JH, Lee SY, Kang MJ, Yoon J, Jung S, Cho HJ, Kim HB, Hong SJ. Association of Genetic Polymorphisms with Atopic Dermatitis, Clinical Severity and Total IgE: A Replication and Extended Study. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2018; 10:397-405. [PMID: 29949836 PMCID: PMC6021591 DOI: 10.4168/aair.2018.10.4.397] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 04/11/2018] [Accepted: 04/13/2018] [Indexed: 11/20/2022]
Abstract
Purpose Atopic dermatitis (AD) is a common and chronic inflammatory skin disease affecting up to 20% of children and 3% of adults worldwide. Although previous reports including genome-wide association study (GWAS) approaches have identified several risk factors that appear to be associated with AD development, replication studies are lacking. In our current study, we replicated the associations between candidate susceptibility loci and AD. Methods A total of 885 Korean subjects (425 AD patients and 460 unaffected controls) were genotyped for 17 single nucleotide polymorphisms (SNPs) from previous GWASs and meta-analyses of AD and from immune-related genes. Results Several SNPs showed significant associations with AD in the case-control analysis (minimum P=0.005 at rs17389644), suggesting that these polymorphisms may be related to this disease. In addition, several SNPs showed significant signals (minimum P=0.004 at rs6473227) in severe AD compared to unaffected controls. In additional linear regression analysis, a few genotypes appeared to have potential effects on the SCORing AD (SCORAD) values (minimum P=0.003 at rs13361382 on TMEM232) and immunoglobulin E (IgE) levels (minimum P<0.0001 at rs4713555 near HLA-DRB1 and HLA-DQA1) in AD patients. Conclusions Our replication and extended study provide additional supporting information on the genetic associations (especially, variants in TMEM232 and nearby to IL21 and HLA-DRB1/HLA-DQA1) related to AD, its clinical severity and IgE involvement.
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Affiliation(s)
- Jeong Hyun Kim
- Department of Medicine, University of Ulsan Collage of Medicine, Seoul, Korea
| | - So Yeon Lee
- Department of Pediatrics, Childhood Asthma Atopy Center, Environmental Health Center, Asan Medical Center, University of Ulsan Collage of Medicine, Seoul, Korea
| | - Mi Jin Kang
- Asan Institute for Life Sciences, University of Ulsan Collage of Medicine, Seoul, Korea
| | - Jisun Yoon
- Department of Pediatrics, Childhood Asthma Atopy Center, Environmental Health Center, Asan Medical Center, University of Ulsan Collage of Medicine, Seoul, Korea
| | - Sungsu Jung
- Department of Pediatrics, Childhood Asthma Atopy Center, Environmental Health Center, Asan Medical Center, University of Ulsan Collage of Medicine, Seoul, Korea
| | - Hyun Ju Cho
- Department of Pediatrics, Mediplex Sejong Hospital, Incheon, Korea
| | - Hyo Bin Kim
- Department of Pediatrics, Inje University Sanggye Paik Hospital, Seoul, Korea
| | - Soo Jong Hong
- Department of Pediatrics, Childhood Asthma Atopy Center, Environmental Health Center, Asan Medical Center, University of Ulsan Collage of Medicine, Seoul, Korea.
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12
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Martel BC, Lovato P, Bäumer W, Olivry T. Translational Animal Models of Atopic Dermatitis for Preclinical Studies. THE YALE JOURNAL OF BIOLOGY AND MEDICINE 2017; 90:389-402. [PMID: 28955179 PMCID: PMC5612183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
There is a medical need to develop new treatments for patients suffering from atopic dermatitis (AD). To improve the discovery and testing of novel treatments, relevant animal models for AD are needed. Generally, these animal models mimic different aspects of the pathophysiology of human AD, such as skin barrier defects and Th2 immune bias with additional Th1 and Th22, and in some populations Th17, activation. However, the pathomechanistic characterization and pharmacological validation of these animal models are generally incomplete. In this paper, we review animal models of AD in the context of preclinical use and their possible translation to the human disease. Most of these models use mice, but we will also critically evaluate dog models of AD, as increasing information on disease mechanism show their likely relevance for the human disease.
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Affiliation(s)
- Britta C. Martel
- LEO Pharma A/S, Ballerup, Denmark,Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | | | - Wolfgang Bäumer
- Department of Molecular Biological Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA,Comparative Medicine Institute, North Carolina State University, Raleigh, NC, USA
| | - Thierry Olivry
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA,Comparative Medicine Institute, North Carolina State University, Raleigh, NC, USA,To whom all correspondence should be addressed: Thierry Olivry, Department of Clinical Sciences, College of Veterinary Medicine, 1060 William Moore Drive, Raleigh, NC, 27607, E-mail:
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13
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Chen QL, Li CX, Shao B, Gong ZC, Liu H, Ling B, Abasi K, Hu LL, Wang B, Yin XP. Expression of the interleukin-21 and phosphorylated extracellular signal regulated kinase 1/2 in Kimura disease. J Clin Pathol 2017; 70:684-689. [PMID: 28108473 PMCID: PMC5537556 DOI: 10.1136/jclinpath-2016-204096] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2016] [Revised: 12/14/2016] [Accepted: 12/21/2016] [Indexed: 12/22/2022]
Abstract
OBJECTIVE To investigate the expressions of interleukin (IL)-21 and phosphorylated extracellular signal regulated kinase 1/2 (pERK1/2) in Kimura disease (KD) and to correlate the findings with clinical and prognostic variables. METHODS Immunohistochemical analysis of IL-21 and pERK1/2 was performed in 18 cases of KD and five gender- and age-matched control samples. Clinical data were extracted and patients followed up for a mean period of 32.1 months. RESULTS After a mean follow-up period of 32.1 months (range 1-102 months), recurrence was diagnosed as the end point for seven patients-that is, a 44% (7/16) cumulative recurrence rate. In comparison with gender- and age-matched controls, patients showed strong in situ expressions of IL-21 and pERK1/2, respectively (p<0.05). Patients with strong IL-21 staining intensity and overexpression of pERK1/2 had a lower recurrence rate than those with moderate staining intensity (p=0.049, p=0.019, respectively). However, differences were not statistically significant by gender, age, eosinophils, location, multiplicity, laterality, size, duration and primary outbreak. pERK1/2 was the independent prognostic factor (p=0.020), while age, gender, eosinophils, multiplicity, laterality, size, duration, primary outbreak and expression of IL-21 were not. CONCLUSIONS This study suggests that the IL-21/pERK1/2 pathway is activated in KD, and pERK1/2 might be considered as a potential prognostic indicator in KD.
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Affiliation(s)
- Qing-Li Chen
- Oncological Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Xinjiang Medical University, Stomatology School of Xinjiang Medical University, Stomatology Research Institute of Xinjiang Province, Urumqi, China
| | - Chen-Xi Li
- Oncological Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Xinjiang Medical University, Stomatology School of Xinjiang Medical University, Stomatology Research Institute of Xinjiang Province, Urumqi, China
| | - Bo Shao
- Oncological Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Xinjiang Medical University, Stomatology School of Xinjiang Medical University, Stomatology Research Institute of Xinjiang Province, Urumqi, China
| | - Zhong-Cheng Gong
- Oncological Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Xinjiang Medical University, Stomatology School of Xinjiang Medical University, Stomatology Research Institute of Xinjiang Province, Urumqi, China
| | - Hui Liu
- Oncological Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Xinjiang Medical University, Stomatology School of Xinjiang Medical University, Stomatology Research Institute of Xinjiang Province, Urumqi, China
| | - Bin Ling
- Oncological Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Xinjiang Medical University, Stomatology School of Xinjiang Medical University, Stomatology Research Institute of Xinjiang Province, Urumqi, China
| | - Keremu Abasi
- Oncological Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Xinjiang Medical University, Stomatology School of Xinjiang Medical University, Stomatology Research Institute of Xinjiang Province, Urumqi, China
| | - Lu-Lu Hu
- Oncological Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Xinjiang Medical University, Stomatology School of Xinjiang Medical University, Stomatology Research Institute of Xinjiang Province, Urumqi, China
| | - Bing Wang
- Oncological Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Xinjiang Medical University, Stomatology School of Xinjiang Medical University, Stomatology Research Institute of Xinjiang Province, Urumqi, China
| | - Xiao-Peng Yin
- Oncological Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Xinjiang Medical University, Stomatology School of Xinjiang Medical University, Stomatology Research Institute of Xinjiang Province, Urumqi, China
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14
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Jones AV, Tilley M, Gutteridge A, Hyde C, Nagle M, Ziemek D, Gorman D, Fauman EB, Chen X, Miller MR, Tian C, Hu Y, Hinds DA, Cox P, Scollen S. GWAS of self-reported mosquito bite size, itch intensity and attractiveness to mosquitoes implicates immune-related predisposition loci. Hum Mol Genet 2017; 26:1391-1406. [PMID: 28199695 PMCID: PMC5390679 DOI: 10.1093/hmg/ddx036] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 01/23/2017] [Indexed: 12/31/2022] Open
Abstract
Understanding the interaction between humans and mosquitoes is a critical area of study due to the phenomenal burdens on public health from mosquito-transmitted diseases. In this study, we conducted the first genome-wide association studies (GWAS) of self-reported mosquito bite reaction size (n = 84,724), itchiness caused by bites (n = 69,057), and perceived attractiveness to mosquitoes (n = 16,576). In total, 15 independent significant (P < 5×10−8) associations were identified. These loci were enriched for immunity-related genes that are involved in multiple cytokine signalling pathways. We also detected suggestive enrichment of these loci in enhancer regions that are active in stimulated T-cells, as well as within loci previously identified as controlling central memory T-cell levels. Egger regression analysis between the traits suggests that perception of itchiness and attractiveness to mosquitoes is driven, at least in part, by the genetic determinants of bite reaction size. Our findings illustrate the complex genetic and immunological landscapes underpinning human interactions with mosquitoes.
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Affiliation(s)
- Amy V. Jones
- Pfizer WRD, Human Genetics and Computational Biomedicine, The Portway Building, Granta Park, Cambridge CB21 6GS, UK
| | - Mera Tilley
- Pfizer WRD, Pharmatherapeutics Clinical R&D, Precision Medicine, 300 Technology Square Fl #3, Cambridge, MA 02139, USA
| | - Alex Gutteridge
- Pfizer WRD, Computational Sciences CoE, The Portway Building, Granta Park, Cambridge CB21 6GS, UK
| | - Craig Hyde
- Pfizer WRD, Research Statistics, 558 Eastern Point Rd, Groton, CT 06340, USA
| | - Michael Nagle
- Pfizer WRD, Human Genetics and Computational Biomedicine, 610 Main Street S, Cambridge, MA 02139, USA
| | - Daniel Ziemek
- Pfizer WRD, Computational Sciences CoE, Linkstraße 10, 10785 Berlin, Germany
| | - Donal Gorman
- Pfizer WRD, Research Statistics, The Portway Building, Granta Park, Cambridge CB21 6GS, UK
| | - Eric B. Fauman
- Pfizer WRD, Computational Sciences CoE, 610 Main Street S, Cambridge, MA 02139, USA
| | - Xing Chen
- Pfizer WRD, Research Statistics, 558 Eastern Point Rd, Groton, CT 06340, USA
| | - Melissa R. Miller
- Pfizer WRD, Human Genetics and Computational Biomedicine, 610 Main Street S, Cambridge, MA 02139, USA
| | - Chao Tian
- 23andMe, Inc, 899 W Evelyn Avenue, Mountain View, California, CA 94043, USA
| | - Youna Hu
- 23andMe, Inc, 899 W Evelyn Avenue, Mountain View, California, CA 94043, USA
| | - David A. Hinds
- 23andMe, Inc, 899 W Evelyn Avenue, Mountain View, California, CA 94043, USA
| | - Peter Cox
- Pfizer Ltd, Neuroscience and Pain Research Unit, The Portway Building, Granta Park, Cambridge CB21 6GS, UK
| | - Serena Scollen
- Pfizer WRD, Human Genetics and Computational Biomedicine, The Portway Building, Granta Park, Cambridge CB21 6GS, UK
- To whom correspondence should be addressed at: ELIXIR Hub, Wellcome Genome Campus, Hinxton, Cambridge CB10 1SD, UK. Tel: +44 1223494322; Fax: +44 (0)1223 484696;
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15
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Son HU, Lee S, Heo JC, Lee SH. The solid-state fermentation of Artemisia capillaris leaves with Ganoderma lucidum enhances the anti-inflammatory effects in a model of atopic dermatitis. Int J Mol Med 2017; 39:1233-1241. [PMID: 28393198 PMCID: PMC5403521 DOI: 10.3892/ijmm.2017.2945] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 03/23/2017] [Indexed: 11/30/2022] Open
Abstract
Artemisia capillaris, which belongs to the Asteraceae family and the genus Artemisia, has been reported to exert inhibitory effects on diabetes, cancer and inflammation. In this study, in order to enhance the bioactivity potential of the leaves of Artemisia by Ganoderma lucidum mycelium, we prepared aqueous samples of Artemisia capillaris (Ac) leaves, Ganoderma lucidum (Gl) and aqueous fractions produced by the solid fermentation of Ganoderma lucidum on Artemisia capillaris leaves (afAc/Gl). Thereafter, we evaluated whether these samples have potential to attenuate inflammation-related symptoms in an amimal model of 2,4-dinitrofluorobenzene (DNFB)-induced atopic dermatitis. We found that afAc/Gl exhibited enhanced anti-inflamamatory activity following the solid fermentation process when compared with Ac or Gl on ear thickness, ear epidermal thickness and eosinophil infiltration in the skin tissues. The expression of nitric oxide (NO) synthases (NOSs) was measured by immunohistochemical staining. The results revealed that afAc/Gl decreased endothelial NOS and inducible NOS expression compared with the DNFB group, while neuronal NOS expression was not altered. By comparing NO production, we found that as opposed to Ac, afAc/Gl has potential to inhibit atopic dermatitis-related symptoms during the inflammatory event. As regards matrix metalloproteinase (MMP) expression patterns, afAc/Gl exerted potent inhibitory activity on the mRNA expression of MMP-2, -7, -9, -12, -14 and -19. Taken together, these results suggest that the solid state fermentation of Ac by Gl is an effective strategy to obtaining useful ingredients which are converted into valuable compounds during an atopic inflammatory insult.
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Affiliation(s)
- Hyeong-U Son
- Department of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, P.R. China
| | - Seul Lee
- Department of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, P.R. China
| | - Jin-Chul Heo
- Department of Medical Genomics, Keimyung University School of Medicine, Daegu 41931, Republic of Korea
| | - Sang-Han Lee
- Department of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, P.R. China
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16
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Yoon J, Leyva-Castillo JM, Wang G, Galand C, Oyoshi MK, Kumar L, Hoff S, He R, Chervonsky A, Oppenheim JJ, Kuchroo VK, van den Brink MRM, Malefyt RDW, Tessier PA, Fuhlbrigge R, Rosenstiel P, Terhorst C, Murphy G, Geha RS. IL-23 induced in keratinocytes by endogenous TLR4 ligands polarizes dendritic cells to drive IL-22 responses to skin immunization. J Exp Med 2016; 213:2147-66. [PMID: 27551155 PMCID: PMC5032726 DOI: 10.1084/jem.20150376] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 07/25/2016] [Indexed: 12/12/2022] Open
Abstract
Atopic dermatitis (AD) is a Th2-dominated inflammatory skin disease characterized by epidermal thickening. Serum levels of IL-22, a cytokine known to induce keratinocyte proliferation, are elevated in AD, and Th22 cells infiltrate AD skin lesions. We show that application of antigen to mouse skin subjected to tape stripping, a surrogate for scratching, induces an IL-22 response that drives epidermal hyperplasia and keratinocyte proliferation in a mouse model of skin inflammation that shares many features of AD. DC-derived IL-23 is known to act on CD4(+) T cells to induce IL-22 production. However, the mechanisms that drive IL-23 production by skin DCs in response to cutaneous sensitization are not well understood. We demonstrate that IL-23 released by keratinocytes in response to endogenous TLR4 ligands causes skin DCs, which selectively express IL-23R, to up-regulate their endogenous IL-23 production and drive an IL-22 response in naive CD4(+) T cells that mediates epidermal thickening. We also show that IL-23 is released in human skin after scratching and polarizes human skin DCs to drive an IL-22 response, supporting the utility of IL-23 and IL-22 blockade in AD.
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Affiliation(s)
- Juhan Yoon
- Division of Immunology, Children's Hospital and Department of Pediatrics, Harvard Medical School, Boston, MA 02115
| | - Juan Manuel Leyva-Castillo
- Division of Immunology, Children's Hospital and Department of Pediatrics, Harvard Medical School, Boston, MA 02115
| | - Guoxing Wang
- Division of Immunology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115
| | - Claire Galand
- Division of Immunology, Children's Hospital and Department of Pediatrics, Harvard Medical School, Boston, MA 02115
| | - Michiko K Oyoshi
- Division of Immunology, Children's Hospital and Department of Pediatrics, Harvard Medical School, Boston, MA 02115
| | - Lalit Kumar
- Division of Immunology, Children's Hospital and Department of Pediatrics, Harvard Medical School, Boston, MA 02115
| | - Sabine Hoff
- Division of Immunology, Children's Hospital and Department of Pediatrics, Harvard Medical School, Boston, MA 02115
| | - Rui He
- Division of Immunology, Children's Hospital and Department of Pediatrics, Harvard Medical School, Boston, MA 02115
| | | | - Joost J Oppenheim
- Laboratory of Molecular Immunoregulation, National Cancer Institute, Frederick, MD 21702
| | - Vijay K Kuchroo
- Center for Neurological Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115
| | - Marcel R M van den Brink
- Department of Immunology and Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10065
| | | | - Philippe A Tessier
- Centre de Recherche du Centre Hospitalier de l'Université Laval, Sainte-Foy, Quebec QC G1V 4G2, Canada
| | - Robert Fuhlbrigge
- Division of Immunology, Children's Hospital and Department of Pediatrics, Harvard Medical School, Boston, MA 02115
| | - Philip Rosenstiel
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, 24105 Kiel, Germany
| | - Cox Terhorst
- Division of Immunology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115
| | - George Murphy
- Department of Dermatology, Harvard Medical School, Boston, MA 02115 Division of Dermatopathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115
| | - Raif S Geha
- Division of Immunology, Children's Hospital and Department of Pediatrics, Harvard Medical School, Boston, MA 02115
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17
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Scavenging nucleic acid debris to combat autoimmunity and infectious disease. Proc Natl Acad Sci U S A 2016; 113:9728-33. [PMID: 27528673 DOI: 10.1073/pnas.1607011113] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Nucleic acid-containing debris released from dead and dying cells can be recognized as damage-associated molecular patterns (DAMPs) or pattern-associated molecular patterns (PAMPs) by the innate immune system. Inappropriate activation of the innate immune response can engender pathological inflammation and autoimmune disease. To combat such diseases, major efforts have been made to therapeutically target the pattern recognition receptors (PRRs) such as the Toll-like receptors (TLRs) that recognize such DAMPs and PAMPs, or the downstream effector molecules they engender, to limit inflammation. Unfortunately, such strategies can limit the ability of the immune system to combat infection. Previously, we demonstrated that nucleic acid-binding polymers can act as molecular scavengers and limit the ability of artificial nucleic acid ligands to activate PRRs. Herein, we demonstrate that nucleic acid scavengers (NASs) can limit pathological inflammation and nucleic acid-associated autoimmunity in lupus-prone mice. Moreover, we observe that such NASs do not limit an animal's ability to combat viral infection, but rather their administration improves survival when animals are challenged with lethal doses of influenza. These results indicate that molecules that scavenge extracellular nucleic acid debris represent potentially safer agents to control pathological inflammation associated with a wide range of autoimmune and infectious diseases.
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18
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Galand C, Leyva-Castillo JM, Yoon J, Han A, Lee MS, McKenzie ANJ, Stassen M, Oyoshi MK, Finkelman FD, Geha RS. IL-33 promotes food anaphylaxis in epicutaneously sensitized mice by targeting mast cells. J Allergy Clin Immunol 2016; 138:1356-1366. [PMID: 27372570 DOI: 10.1016/j.jaci.2016.03.056] [Citation(s) in RCA: 136] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Revised: 03/03/2016] [Accepted: 03/29/2016] [Indexed: 12/25/2022]
Abstract
BACKGROUND Cutaneous exposure to food allergens predisposes to food allergy, which is commonly associated with atopic dermatitis (AD). Levels of the epithelial cytokine IL-33 are increased in skin lesions and serum of patients with AD. Mast cells (MCs) play a critical role in food-induced anaphylaxis and express the IL-33 receptor ST2. The role of IL-33 in patients with MC-dependent food anaphylaxis is unknown. OBJECTIVE We sought to determine the role and mechanism of action of IL-33 in patients with food-induced anaphylaxis in a model of IgE-dependent food anaphylaxis elicited by oral challenge of epicutaneously sensitized mice. METHODS Wild-type, ST2-deficient, and MC-deficient KitW-sh/W-sh mice were epicutaneously sensitized with ovalbumin (OVA) and then challenged orally with OVA. Body temperature was measured by means of telemetry, Il33 mRNA by means of quantitative PCR, and IL-33, OVA-specific IgE, and mouse mast cell protease 1 by means of ELISA. Bone marrow-derived mast cell (BMMC) degranulation was assessed by using flow cytometry. RESULTS Il33 mRNA expression was upregulated in tape-stripped mouse skin and scratched human skin. Tape stripping caused local and systemic IL-33 release in mice. ST2 deficiency, as well as ST2 blockade before oral challenge, significantly reduced the severity of oral anaphylaxis without affecting the systemic TH2 response to the allergen. Oral anaphylaxis was abrogated in KitW-sh/W-sh mice and restored by means of reconstitution with wild-type but not ST2-deficient BMMCs. IL-33 significantly enhanced IgE-mediated degranulation of BMMCs in vitro. CONCLUSION IL-33 is released after mechanical skin injury, enhances IgE-mediated MC degranulation, and promotes oral anaphylaxis after epicutaneous sensitization by targeting MCs. IL-33 neutralization might be useful in treating food-induced anaphylaxis in patients with AD.
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Affiliation(s)
- Claire Galand
- Division of Immunology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, Mass
| | - Juan Manuel Leyva-Castillo
- Division of Immunology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, Mass
| | - Juhan Yoon
- Division of Immunology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, Mass
| | - Alex Han
- Division of Immunology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, Mass
| | - Margaret S Lee
- Division of Immunology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, Mass
| | - Andrew N J McKenzie
- Medical Research Council Laboratory of Molecular Biology, Cambridge, United Kingdom
| | - Michael Stassen
- Institute for Immunology, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Michiko K Oyoshi
- Division of Immunology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, Mass
| | - Fred D Finkelman
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, the Department of Medicine, Cincinnati Veterans Affairs Medical Center, and the Division of Immunology, Allergy and Rheumatology, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Raif S Geha
- Division of Immunology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, Mass.
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19
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Halwani R, Sultana A, Al-Kufaidy R, Jamhawi A, Vazquez-Tello A, Al-Muhsen S. Th-17 regulatory cytokines inhibit corticosteroid induced airway structural cells apoptosis. Respir Res 2016; 17:6. [PMID: 26772733 PMCID: PMC4715361 DOI: 10.1186/s12931-015-0307-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2015] [Accepted: 12/04/2015] [Indexed: 12/22/2022] Open
Abstract
Background Although corticosteroid is a powerful anti-inflammatory drug that is used widely to control asthma, still severe asthmatics can develop steroid resistance. Airway fibroblasts are quite resistant to steroids during Idiopathic pulmonary fibrosis (IPF) and fibrosis in asthmatic lungs is not always controlled. Th-17 regulatory cytokine which are elevated in lung tissues of asthmatics were shown to enhance the survival of various types of cells. STAT factors are central to this anti-apoptotic function. However, it is not yet clear whether these cytokines contribute to steroid hypo-responsiveness in asthma. Therefore, in this study, we investigated the ability of Th-17 regulatory cytokines, specifically IL-21, IL22 and IL23, to protect structural airway cells against dexamethasone-induced apoptosis. Methods Primary human fibroblasts, ASM cells, and lung endothelial cells line were treated with IL-21, IL-22, and IL-23 cytokines before incubation with dexamethasone and the level of apoptosis was determined by measuring cellular Annexin-V using Flow cytometry. Results Our data indicated that treatment with Th-17 regulatory cytokines was effective in inhibiting induced apoptosis for both fibroblasts and endothelial cells but not ASM cells. STAT3 phosphorylation levels were also upregulated in fibroblasts and endothelial upon treatment with these cytokines. Interestingly, inhibiting STAT3 phosphorylation abrogated IL-21, IL-22, and IL-23 anti-apoptotic effect on fibroblasts and endothelial cells. Conclusions This data suggest that Th-17 regulatory cytokines may play a critical role in regulating the survival of fibroblasts during asthma, IPF as well as other chronic lung inflammatory diseases leading to enhanced fibrosis. Accordingly, findings of this paper may pave the way for more extensive research on the role of these regulatory cytokines in fibrosis development in various chronic inflammatory diseases.
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Affiliation(s)
- Rabih Halwani
- Prince Naif Center for Immunology Research and Asthma Research Chair, Department of Pediatrics, College of Medicine, King Saud University, P. O. Box 2925, Postal Code 11461, Riyadh, Saudi Arabia.
| | - Asma Sultana
- Prince Naif Center for Immunology Research and Asthma Research Chair, Department of Pediatrics, College of Medicine, King Saud University, P. O. Box 2925, Postal Code 11461, Riyadh, Saudi Arabia.,Prince Naif Health Research Center, King Saud University, Riyadh, Saudi Arabia
| | - Roua Al-Kufaidy
- Prince Naif Center for Immunology Research and Asthma Research Chair, Department of Pediatrics, College of Medicine, King Saud University, P. O. Box 2925, Postal Code 11461, Riyadh, Saudi Arabia
| | - Amer Jamhawi
- Prince Naif Center for Immunology Research and Asthma Research Chair, Department of Pediatrics, College of Medicine, King Saud University, P. O. Box 2925, Postal Code 11461, Riyadh, Saudi Arabia
| | - Alejandro Vazquez-Tello
- Prince Naif Center for Immunology Research and Asthma Research Chair, Department of Pediatrics, College of Medicine, King Saud University, P. O. Box 2925, Postal Code 11461, Riyadh, Saudi Arabia
| | - Saleh Al-Muhsen
- Prince Naif Center for Immunology Research and Asthma Research Chair, Department of Pediatrics, College of Medicine, King Saud University, P. O. Box 2925, Postal Code 11461, Riyadh, Saudi Arabia
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20
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Oyoshi MK, Beaupré J, Venturelli N, Lewis CN, Iwakura Y, Geha RS. Filaggrin deficiency promotes the dissemination of cutaneously inoculated vaccinia virus. J Allergy Clin Immunol 2015; 135:1511-8.e6. [PMID: 25649082 PMCID: PMC4461532 DOI: 10.1016/j.jaci.2014.12.1923] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 12/11/2014] [Accepted: 12/12/2014] [Indexed: 01/05/2023]
Abstract
BACKGROUND Eczema vaccinatum is a life-threatening complication of smallpox vaccination in patients with atopic dermatitis (AD) characterized by dissemination of vaccinia virus (VV) in the skin and internal organs. Mutations in the filaggrin (FLG) gene, the most common genetic risk factor for AD, confer a greater risk for eczema herpeticum in patients with AD, suggesting that it impairs the response to cutaneous viral infections. OBJECTIVE We sought to determine the effects of FLG deficiency on the response of mice to cutaneous VV inoculation. METHODS VV was inoculated by means of scarification of unsensitized skin or skin topically sensitized with ovalbumin in FLG-deficient flaky tail (ft/ft) mice or wild-type (WT) control mice. The sizes of primary and satellite skin lesions were measured, and hematoxylin and eosin staining was performed. VV genome copy numbers and cytokine mRNA levels were measured by using quantitative PCR. RESULTS VV inoculation in unsensitized skin of ft/ft mice, independent of the matted hair mutation, resulted in larger primary lesions, more abundant satellite lesions, heavier viral loads in internal organs, greater epidermal thickness, dermal cellular infiltration, and higher local Il17a, Il4, Il13, and Ifng mRNA levels than in WT control mice. VV inoculation at sites of topical ovalbumin application amplified all of these features in ft/ft mice but had no detectable effect in WT control mice. The number of satellite lesions and the viral loads in internal organs after cutaneous VV inoculation were significantly reduced in both unsensitized and topically sensitized ft/ftxIl17a(-/-) mice. CONCLUSION FLG deficiency predisposes to eczema vaccinatum. This is mediated primarily through production of IL-17A.
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Affiliation(s)
- Michiko K Oyoshi
- Division of Immunology, Boston Children's Hospital and the Department of Medicine, Harvard Medical School, Boston, Mass.
| | - Jacqueline Beaupré
- Division of Immunology, Boston Children's Hospital and the Department of Medicine, Harvard Medical School, Boston, Mass
| | - Nicholas Venturelli
- Division of Immunology, Boston Children's Hospital and the Department of Medicine, Harvard Medical School, Boston, Mass
| | - Christopher N Lewis
- Division of Immunology, Boston Children's Hospital and the Department of Medicine, Harvard Medical School, Boston, Mass
| | - Yoichiro Iwakura
- Research Institute for Biomedical Sciences, Tokyo University of Science, Chiba, Japan
| | - Raif S Geha
- Division of Immunology, Boston Children's Hospital and the Department of Medicine, Harvard Medical School, Boston, Mass
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21
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Mucosal interleukin-21 mRNA expression level is high in patients with Helicobacter pylori and is associated with the severity of gastritis. Cent Eur J Immunol 2015; 40:61-7. [PMID: 26155185 PMCID: PMC4472541 DOI: 10.5114/ceji.2015.50835] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Accepted: 01/05/2015] [Indexed: 12/14/2022] Open
Abstract
Helicobacter pylori (H. pylori) infection is associated with gastritis and marked infiltration of the gastric mucosa by several cytokines secreting inflammatory cells. Different clinical forms of the infection may reflect distinctive patterns of cytokine expression. Interleukin (IL)-17, IL-21, IL-22, and IL-23 have been reported to be involved in H. pylori-induced gastric mucosal inflammation, but the details and relationship to different patterns of inflammation and virulence factors remain unclear. The present study was launched to analyse IL-6 expression in H. pylori-infected and uninfected gastric patients and to investigate its correlation with chronic gastritis among H. pylori-infected patients. Total RNA was extracted from the gastric antrum biopsies of 48 H. pylori-infected patients and 38 H. pylori uninfected patients. Mucosal IL-21 mRNA expression level in H. pylori-infected and uninfected gastric biopsy was determined by real-time PCR. The presence of vacA (vacuolating cytotoxin A) and cagA (cytotoxin associated gene A) virulence factors were evaluated using PCR. Interleukin-21 mRNA expression was significantly high in biopsies of H. pylori-infected patients compared to H. pylori uninfected patients, and the mucosal IL-21 mRNA level was positively correlated with the grade of chronic inflammation. There was no association between virulence factors and IL-21 mRNA expression. We believe that IL-21 might be involved in the pathogenesis of H. pylori and might be an index of the severity of chronic gastritis.
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22
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Cheng S, Chen H, Wang A, Bunjhoo H, Cao Y, Xie J, Xu Y, Xiong W. Exclusion of IL-21 in the pathogenesis of OVA-induced asthma in mice. Int J Clin Exp Med 2014; 7:3202-3208. [PMID: 25419350 PMCID: PMC4238472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 09/15/2014] [Indexed: 06/04/2023]
Abstract
Asthma is characterized by airway inflammation, mucus overproduction, and airway hyperreactivity. Cytokines, especially T helper 2-derived cytokines interleukin (IL)-4, IL-5, and IL-13, are involved in the pathogenesis of asthma. IL-21 has a variety of effects on the immune system. However, the contribution of IL-21 to the development of allergic diseases is currently controversial. The aim of this study was to investigate the effect of IL-21 on asthma airway inflammation in vivo. A murine ovalbumin (OVA)-induced allergic asthma model was used. The concentration of IL-21 in the bronchoalveolar lavage fluid (BALF) of mice was evaluated by enzyme-linked immunosorbent assay. BALF cellularity, lung histopathology, and sera IgE levels were compared between the normal control group, OVA sensitization/challenge group, and OVA sensitization/challenge plus IL-21-administered group. An OVA-induced allergic rhinitis model with IL-21 was used as a positive control and the infiltration of eosinophils in the nasal mucosa was evaluated. The concentration of IL-21 in the BALF was lower in the asthmatic group compared with the normal control group. However, no significant differences in airway eosinophilia, lung histopathology, and sera IgE levels were observed between the OVA sensitization/challenge group and OVA sensitization/challenge plus IL-21-administered group. Decreased eosinophilic infiltration of nasal mucosa was observed in the positive control allergic rhinitis model administered IL-21 during the challenge period. Exogenous administration of IL-21 alone may not alleviate allergic lung inflammation. The role of IL-21 in allergic lung inflammation needs further research.
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Affiliation(s)
- Sheng Cheng
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Key Laboratory of Pulmonary Diseases of Health Ministry, Tongji Medical College, Huazhong University of Science and Technology 1095 Jiefang Ave., Wuhan 430030, China
| | - Huilong Chen
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Key Laboratory of Pulmonary Diseases of Health Ministry, Tongji Medical College, Huazhong University of Science and Technology 1095 Jiefang Ave., Wuhan 430030, China
| | - Aili Wang
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Key Laboratory of Pulmonary Diseases of Health Ministry, Tongji Medical College, Huazhong University of Science and Technology 1095 Jiefang Ave., Wuhan 430030, China
| | - Hansvin Bunjhoo
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Key Laboratory of Pulmonary Diseases of Health Ministry, Tongji Medical College, Huazhong University of Science and Technology 1095 Jiefang Ave., Wuhan 430030, China
| | - Yong Cao
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Key Laboratory of Pulmonary Diseases of Health Ministry, Tongji Medical College, Huazhong University of Science and Technology 1095 Jiefang Ave., Wuhan 430030, China
| | - Jungang Xie
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Key Laboratory of Pulmonary Diseases of Health Ministry, Tongji Medical College, Huazhong University of Science and Technology 1095 Jiefang Ave., Wuhan 430030, China
| | - Yongjian Xu
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Key Laboratory of Pulmonary Diseases of Health Ministry, Tongji Medical College, Huazhong University of Science and Technology 1095 Jiefang Ave., Wuhan 430030, China
| | - Weining Xiong
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Key Laboratory of Pulmonary Diseases of Health Ministry, Tongji Medical College, Huazhong University of Science and Technology 1095 Jiefang Ave., Wuhan 430030, China
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Tordesillas L, Goswami R, Benedé S, Grishina G, Dunkin D, Järvinen KM, Maleki SJ, Sampson HA, Berin MC. Skin exposure promotes a Th2-dependent sensitization to peanut allergens. J Clin Invest 2014; 124:4965-75. [PMID: 25295541 DOI: 10.1172/jci75660] [Citation(s) in RCA: 157] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 09/04/2014] [Indexed: 01/21/2023] Open
Abstract
Sensitization to foods often occurs in infancy, without a known prior oral exposure, suggesting that alternative exposure routes contribute to food allergy. Here, we tested the hypothesis that peanut proteins activate innate immune pathways in the skin that promote sensitization. We exposed mice to peanut protein extract on undamaged areas of skin and observed that repeated topical exposure to peanut allergens led to sensitization and anaphylaxis upon rechallenge. In mice, this epicutaneous peanut exposure induced sensitization to the peanut components Ara h 1 and Ara h 2, which is also observed in human peanut allergy. Both crude peanut extract and Ara h 2 alone served as adjuvants, as both induced a bystander sensitization that was similar to that induced by the atopic dermatitis-associated staphylococcal enterotoxin B. In cultured human keratinocytes and in murine skin, peanut extract directly induced cytokine expression. Moreover, topical peanut extract application induced an alteration dependent on the IL-33 receptor ST2 in skin-draining DCs, resulting in Th2 cytokine production from T cells. Together, our data support the hypothesis that peanuts are allergenic due to inherent adjuvant activity and suggest that skin exposure to food allergens contributes to sensitization to foods in early life.
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24
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Muto J, Morioka Y, Yamasaki K, Kim M, Garcia A, Carlin AF, Varki A, Gallo RL. Hyaluronan digestion controls DC migration from the skin. J Clin Invest 2014; 124:1309-19. [PMID: 24487587 DOI: 10.1172/jci67947] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Accepted: 11/14/2013] [Indexed: 12/11/2022] Open
Abstract
The breakdown and release of hyaluronan (HA) from the extracellular matrix has been hypothesized to act as an endogenous signal of injury. To test this hypothesis, we generated mice that conditionally overexpressed human hyaluronidase 1 (HYAL1). Mice expressing HYAL1 in skin either during early development or by inducible transient expression exhibited extensive HA degradation, yet displayed no evidence of spontaneous inflammation. Further, HYAL1 expression activated migration and promoted loss of DCs from the skin. We subsequently determined that induction of HYAL1 expression prior to topical antigen application resulted in a lack of an antigenic response due to the depletion of DCs from the skin. In contrast, induction of HYAL1 expression concurrent with antigen exposure accelerated allergic sensitization. Administration of HA tetrasaccharides, before or simultaneously with antigen application, recapitulated phenotypes observed in HYAL1-expressing animals, suggesting that the generation of small HA fragments, rather than the loss of large HA molecules, promotes DC migration and subsequent modification of allergic responses. Furthermore, mice lacking TLR4 did not exhibit HA-associated phenotypes, indicating that TLR4 mediates these responses. This study provides direct evidence that HA breakdown controls the capacity of the skin to present antigen. These events may influence DC function in injury or disease and have potential to be exploited therapeutically for modification of allergic responses.
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25
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Spolski R, Leonard WJ. Interleukin-21: a double-edged sword with therapeutic potential. Nat Rev Drug Discov 2014; 13:379-95. [PMID: 24751819 DOI: 10.1038/nrd4296] [Citation(s) in RCA: 385] [Impact Index Per Article: 38.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Interleukin-21 is a cytokine with broad pleiotropic actions that affect the differentiation and function of lymphoid and myeloid cells. Since its discovery in 2000, a tremendous amount has been learned about its biological actions and the molecular mechanisms controlling IL-21-mediated cellular responses. IL-21 regulates both innate and adaptive immune responses, and it not only has key roles in antitumour and antiviral responses but also exerts major effects on inflammatory responses that promote the development of autoimmune diseases and inflammatory disorders. Numerous studies have shown that enhancing or inhibiting the action of IL-21 has therapeutic effects in animal models of a wide range of diseases, and various clinical trials are underway. The current challenge is to understand how to specifically modulate the actions of IL-21 in the context of each specific immune response or pathological situation. In this Review, we provide an overview of the basic biology of IL-21 and discuss how this information has been - and can be - exploited therapeutically.
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Affiliation(s)
- Rosanne Spolski
- Laboratory of Molecular Immunology, National Heart, Lung, and Blood Institute (NHLBI), US National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Warren J Leonard
- Laboratory of Molecular Immunology, National Heart, Lung, and Blood Institute (NHLBI), US National Institutes of Health, Bethesda, Maryland 20892, USA
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26
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Ando T, Xiao W, Gao P, Namiranian S, Matsumoto K, Tomimori Y, Hong H, Yamashita H, Kimura M, Kashiwakura JI, Hata TR, Izuhara K, Gurish MF, Roers A, Rafaels NM, Barnes KC, Jamora C, Kawakami Y, Kawakami T. Critical role for mast cell Stat5 activity in skin inflammation. Cell Rep 2014; 6:366-76. [PMID: 24412367 PMCID: PMC4329986 DOI: 10.1016/j.celrep.2013.12.029] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Revised: 10/21/2013] [Accepted: 12/17/2013] [Indexed: 01/03/2023] Open
Abstract
Atopic dermatitis (AD) is a chronic inflammatory skin disease. Here, we show that phospholipase C-β3 (PLC-β3)-deficient mice spontaneously develop AD-like skin lesions and more severe allergen-induced dermatitis than wild-type mice. Mast cells were required for both AD models and remarkably increased in the skin of Plcb3(-/-) mice because of the increased Stat5 and reduced SHP-1 activities. Mast cell-specific deletion of Stat5 gene ameliorated allergen-induced dermatitis, whereas that of Shp1 gene encoding Stat5-inactivating SHP-1 exacerbated it. PLC-β3 regulates the expression of periostin in fibroblasts and TSLP in keratinocytes, two proteins critically involved in AD pathogenesis. Furthermore, polymorphisms in PLCB3, SHP1, STAT5A, and STAT5B genes were associated with human AD. Mast cell expression of PLC-β3 was inversely correlated with that of phospho-STAT5, and increased mast cells with high levels of phospho-STAT5 were found in lesional skin of some AD patients. Therefore, STAT5 regulatory mechanisms in mast cells are important for AD pathogenesis.
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Affiliation(s)
- Tomoaki Ando
- Division of Cell Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037, USA
| | - Wenbin Xiao
- Division of Cell Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037, USA
| | - Peisong Gao
- Division of Allergy and Clinical Immunology, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Siavash Namiranian
- Department of Bioengineering, University of California San Diego, La Jolla, CA 92093, USA
| | - Kenji Matsumoto
- Department of Allergy and Immunology, National Research Institute for Child Health and Development, Tokyo 157-8535, Japan
| | - Yoshiaki Tomimori
- Division of Cell Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037, USA
| | - Hong Hong
- Division of Cell Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037, USA
| | - Hirotaka Yamashita
- Division of Cell Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037, USA
| | - Miho Kimura
- Division of Cell Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037, USA
| | - Jun-Ichi Kashiwakura
- Laboratory for Allergic Disease, RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Yokohama 230-0045, Japan
| | - Tissa R Hata
- Division of Dermatology, Department of Medicine, University of California San Diego, La Jolla, CA 92037, USA
| | - Kenji Izuhara
- Division of Medical Biochemistry, Department of Biomolecular Sciences and Department of Laboratory Medicine, Saga Medical School, Saga 849-85-01, Japan
| | - Michael F Gurish
- Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Axel Roers
- Institute for Immunology, University of Technology Dresden, Medical Faculty Carl-Gustav Carus, 01307 Dresden, Germany
| | - Nicholas M Rafaels
- Division of Allergy and Clinical Immunology, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Kathleen C Barnes
- Division of Allergy and Clinical Immunology, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Colin Jamora
- Department of Bioengineering, University of California San Diego, La Jolla, CA 92093, USA
| | - Yuko Kawakami
- Division of Cell Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037, USA
| | - Toshiaki Kawakami
- Division of Cell Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037, USA; Laboratory for Allergic Disease, RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Yokohama 230-0045, Japan.
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27
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Abstract
Food allergies are increasing in prevalence at a higher rate than can be explained by genetic factors, suggesting a role for as yet unidentified environmental factors. In this review, we summarize the state of knowledge about the healthy immune response to antigens in the diet and the basis of immune deviation that results in immunoglobulin E (IgE) sensitization and allergic reactivity to foods. The intestinal epithelium forms the interface between the external environment and the mucosal immune system, and emerging data suggest that the interaction between intestinal epithelial cells and mucosal dendritic cells is of particular importance in determining the outcome of immune responses to dietary antigens. Exposure to food allergens through non-oral routes, in particular through the skin, is increasingly recognized as a potentially important factor in the increasing rate of food allergy. There are many open questions on the role of environmental factors, such as dietary factors and microbiota, in the development of food allergy, but data suggest that both have an important modulatory effect on the mucosal immune system. Finally, we discuss recent developments in our understanding of immune mechanisms of clinical manifestations of food allergy. New experimental tools, particularly in the field of genomics and the microbiome, are likely to shed light on factors responsible for the growing clinical problem of food allergy.
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Affiliation(s)
- M Cecilia Berin
- Pediatric Allergy and Immunology, Box 1198, One Gustave L. Levy Place, New York, NY 10029, USA.
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28
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Gong F, Su Q, Pan YH, Huang X, Shen WH. The emerging role of interleukin-21 in allergic diseases (Review). Biomed Rep 2013; 1:837-839. [PMID: 24649038 DOI: 10.3892/br.2013.166] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Accepted: 08/30/2013] [Indexed: 01/08/2023] Open
Abstract
Interleukin (IL)-21 is a newly discovered member of the type I cytokine family. Since its discovery in 2000, IL-21 has been the focus of extensive investigation, due to its homology to IL-2, IL-4 and IL-15 and its pleiotropic effects on innate and adaptive immune responses. An increasing amount of experimental evidence supports a role for IL-21 in the pathogenesis of several allergic diseases, such as allergic rhinitis, atopic dermatitis (AD) and atopic asthma. In this review, we aimed to discuss the biological characteristics of IL-21 and summarize the current progress on the role of IL-21 in the regulation of allergic inflammation.
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Affiliation(s)
- Fang Gong
- Department of Laboratory Medicine, The Third Hospital Affiliated to Nantong University, Wuxi, Jiangsu 214041, P.R. China
| | - Qiang Su
- Department of Pulmonary Medicine, Allergy and Clinical Immunology, The Third Hospital Affiliated to Nantong University, Wuxi, Jiangsu 214041, P.R. China
| | - Yu Hong Pan
- Department of Laboratory Medicine, The Third Hospital Affiliated to Nantong University, Wuxi, Jiangsu 214041, P.R. China
| | - Xuan Huang
- Department of Laboratory Medicine, The Third Hospital Affiliated to Nantong University, Wuxi, Jiangsu 214041, P.R. China
| | - Wei Hong Shen
- Department of Laboratory Medicine, The Third Hospital Affiliated to Nantong University, Wuxi, Jiangsu 214041, P.R. China
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29
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Cytokines and the skin barrier. Int J Mol Sci 2013; 14:6720-45. [PMID: 23531535 PMCID: PMC3645662 DOI: 10.3390/ijms14046720] [Citation(s) in RCA: 195] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Revised: 03/05/2013] [Accepted: 03/18/2013] [Indexed: 12/11/2022] Open
Abstract
The skin is the largest organ of the human body and builds a barrier to protect us from the harmful environment and also from unregulated loss of water. Keratinocytes form the skin barrier by undergoing a highly complex differentiation process that involves changing their morphology and structural integrity, a process referred to as cornification. Alterations in the epidermal cornification process affect the formation of the skin barrier. Typically, this results in a disturbed barrier, which allows the entry of substances into the skin that are immunologically reactive. This contributes to and promotes inflammatory processes in the skin but also affects other organs. In many common skin diseases, including atopic dermatitis and psoriasis, a defect in the formation of the skin barrier is observed. In these diseases the cytokine composition within the skin is different compared to normal human skin. This is the result of resident skin cells that produce cytokines, but also because additional immune cells are recruited. Many of the cytokines found in defective skin are able to influence various processes of differentiation and cornification. Here we summarize the current knowledge on cytokines and their functions in healthy skin and their contributions to inflammatory skin diseases.
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30
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Zhao Y, Wang H, Gustafsson M, Muraro A, Bruhn S, Benson M. Combined multivariate and pathway analyses show that allergen-induced gene expression changes in CD4+ T cells are reversed by glucocorticoids. PLoS One 2012; 7:e39016. [PMID: 22701743 PMCID: PMC3373548 DOI: 10.1371/journal.pone.0039016] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2012] [Accepted: 05/15/2012] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Glucocorticoids (GCs) play a key role in the treatment of allergy. However, the genome-wide effects of GCs on gene expression in allergen-challenged CD4(+) T cells have not been described. The aim of this study was to perform a genome-wide analysis to investigate whether allergen-induced gene expression changes in CD4(+) T cells could be reversed by GCs. METHODOLOGY/PRINCIPAL FINDINGS Gene expression microarray analysis was performed to profile gene expression in diluent- (D), allergen- (A), and allergen + hydrocortisone- (T) challenged CD4(+) T cells from patients with seasonal allergic rhinitis. Principal component analysis (PCA) showed good separation of the three groups. To identify the correlation between changes in gene expression in allergen-challenged CD4(+) T cells before and after GC treatment, we performed orthogonal partial least squares discriminant analysis (OPLS-DA) followed by Pearson correlation analysis. This revealed that allergen-induced genes were widely reversed by GC treatment (r = -0.77, P<0.0001). We extracted 547 genes reversed by GC treatment from OPLS-DA models based on their high contribution to the discrimination and found that those genes belonged to several different inflammatory pathways including TNFR2 Signalling, Interferon Signalling, Glucocorticoid Receptor Signalling and T Helper Cell Differentiation. The results were supported by gene expression microarray analyses of two independent materials. CONCLUSIONS/SIGNIFICANCE Allergen-induced gene expression changes in CD4(+) T cells were reversed by treatment with glucocorticoids. The top allergen-induced genes that reversed by GC treatment belonged to several inflammatory pathways and genes of known or potential relevance for allergy.
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Affiliation(s)
- Yelin Zhao
- Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden
| | - Hui Wang
- Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden
- Department of Pediatrics, University of Gothenburg, Gothenburg, Sweden
| | - Mika Gustafsson
- Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden
| | - Antonella Muraro
- Department of Pediatrics, Center for Food Allergy Diagnosis and Treatment, Veneto Region, University of Padua, Padua, Italy
| | - Sören Bruhn
- Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden
| | - Mikael Benson
- Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden
- * E-mail:
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31
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Novak N, Bieber T. [New advances in atopic dermatitis]. Hautarzt 2012; 63 Suppl 1:67-70. [PMID: 22543949 DOI: 10.1007/s00105-011-2298-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Atopic Dermatitis (AD) is one of the most frequent chronic skin diseases. AD is characterized by a complex, heterogeneous pathogenesis. In this review, we highlight some selected aspects of the pathophysiology of AD, which have gained much attention during recent years. These aspects profoundly changed our view of the pathogenesis of AD and will have impact on its management.
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Affiliation(s)
- N Novak
- Klinik und Poliklinik für Dermatologie und Allergologie, Rheinische Friedrich-Wilhelms-Universität, Sigmund-Freud-Str. 25, 53105, Bonn, Deutschland
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32
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Van Belle TL, Nierkens S, Arens R, von Herrath MG. Interleukin-21 receptor-mediated signals control autoreactive T cell infiltration in pancreatic islets. Immunity 2012; 36:1060-72. [PMID: 22579473 DOI: 10.1016/j.immuni.2012.04.005] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2010] [Revised: 02/10/2012] [Accepted: 04/12/2012] [Indexed: 12/29/2022]
Abstract
It remains unclear how interleukin-21 receptor (IL-21R) contributes to type 1 diabetes. Here we have shown that dendritic cells (DCs) in the pancreas required IL-21R not for antigen uptake, but to acquire the chemokine receptor CCR7 and migrate into the draining lymph node. Consequently, less antigen, major histocompatibility complex (MHC) class II, and CD86 was provided to autoreactive effector cells in Il21r(-/-) mice, impairing CD4(+) T cell activation, CD40:CD40L interactions, and pancreatic infiltration by autoreactive T cells. CD40 crosslinking restored defective CD4(+) cell expansion and CD4 independently expanded autoreactive CD8(+) cells, but CD8(+) cells still required CD4(+) cells to reach the pancreas and induce diabetes. Diabetes induction by transferred T cells required IL-21R-sufficient host antigen-presenting cells. Transferring IL-21R-sufficient DCs broke diabetes resistance in Il21r(-/-) mice. We conclude that IL-21R controls both antigen transport by DCs and the crucial beacon function of CD4(+) cells for autoreactive CD8(+) cells to reach the islets.
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Affiliation(s)
- Tom L Van Belle
- Type 1 Diabetes Center, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037, USA
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33
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Abstract
Atopic dermatitis (AD) is a chronic inflammatory skin disease known for its complex pathophysiology involving several immune pathways. In the lesion, signals from barrier disruption, allergens, and microbial colonization are integrated and transmitted to diverse immune cell types, which initiate and maintain the disease. Cytokines are critical in the allergic intercellular communication networks. This review focuses on up-to-date knowledge on the role of cytokines in AD, including recently described functions as well as novel cellular sources. We propose three modules defined as the cellular source of groups of cytokines: (1) keratinocytes, (2) innate immune cells, and (3) T cells. This view enables to better position the function of novel cytokine players, such as thymic stromal lymphopoetin, IL-21, IL-25, and IL-33, in linking different modules and ultimately leading to the allergic inflammatory phenotype. Persistent efforts in the detailed characterization of cytokine networks will be fundamental for the understanding of the complex pathogenic mechanisms of the disease and for guiding targeted therapeutic interventions.
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34
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Dunkin D, Berin MC, Mayer L. Allergic sensitization can be induced via multiple physiologic routes in an adjuvant-dependent manner. J Allergy Clin Immunol 2011; 128:1251-1258.e2. [PMID: 21762973 DOI: 10.1016/j.jaci.2011.06.007] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2011] [Revised: 06/07/2011] [Accepted: 06/08/2011] [Indexed: 12/23/2022]
Abstract
BACKGROUND Oral exposure to food allergens may be limited in infancy, and the initial site of antigen exposure likely plays an important role in food allergy induction. OBJECTIVE To examine the impact of different routes of exposure by using milk allergens, with and without adjuvant, on sensitization. METHODS C3H/HeJ mice were repeatedly exposed to the milk allergen α-lactalbumin (ALA), with or without cholera toxin (CT). Sensitization routes used were intragastric, cutaneous, intranasal, and sublingual. Anaphylaxis severity was assessed by symptoms and body temperature in response to oral challenge. Antigen-specific serum antibodies were measured by ELISA. The mechanism of adjuvant activity of cutaneous CT was also determined. RESULTS Sensitization to ALA as measured by allergen-specific IgE occurred by all routes of sensitization and was maximal in response to cutaneous exposure. Sensitization was dependent on CT and did not occur to antigen alone by any route. Mucosal, but not cutaneous, exposure resulted in a robust allergen-specific IgA response. Anaphylaxis occurred in all sensitized groups when orally challenged with ALA. Topical CT induced migration of langerin(neg) dermal dendritic cells to the lymph node, resulting in enhanced proliferation and T(H)2 cytokine production from responder T cells. CONCLUSIONS Sensitization can occur via all physiologic routes when adjuvant is present. The skin is a potent and likely important physiologic route of sensitization whereby adjuvant induces an efflux of antigen-bearing dermal dendritic cells to the lymph node that generate a proallergic T(H)2 response.
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Affiliation(s)
- David Dunkin
- Division of Pediatric Gastroenterology, Mount Sinai School of Medicine, New York, NY 10029, USA.
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35
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Guiducci C, Tripodo C, Gong M, Sangaletti S, Colombo MP, Coffman RL, Barrat FJ. Autoimmune skin inflammation is dependent on plasmacytoid dendritic cell activation by nucleic acids via TLR7 and TLR9. ACTA ACUST UNITED AC 2010; 207:2931-42. [PMID: 21115693 PMCID: PMC3005224 DOI: 10.1084/jem.20101048] [Citation(s) in RCA: 158] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Lupus-prone mice develop a chronic inflammatory response to cutaneous injury that depends on the production of type I interferon, TLR7, and TLR9. Recognition of endogenous DNA and RNA by cells expressing TLR7 and TLR9 is an important contributor to the pathogenesis of systemic lupus erythematosus and has been suggested to contribute to cutaneous lupus and to a group of related inflammatory skin diseases termed interface dermatitis. We have developed a mouse model of TLR7- and TLR9-dependent skin inflammation using tape stripping. In normal mice, this resulted in a rapid but transient inflammatory cell infiltration accompanied by induction of type I IFN production by plasmacytoid dendritic cells (PDCs) and release of extracellular traps and proinflammatory cytokines by neutrophils. These responses were strongly reduced in MyD88-deficient mice and in mice treated with a bifunctional inhibitor of TLR7 and TLR9. In contrast, in lupus-prone (NZBxNZW)F1 mice, tape stripping induced the development of chronic lesions characterized by a persistent type I IFN gene signature and many clinical and histological features of cutaneous lupus. Depletion of PDCs before injury prevented the development of skin lesions, whereas treatment with a bifunctional TLR7/9 inhibitor before tape stripping or after the initial lesion was established led to a significant reduction of the disease. These data suggest that inhibitors of TLR7 and TLR9 signaling have potential therapeutic application for the treatment of interface dermatitis.
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36
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Gregorio J, Meller S, Conrad C, Di Nardo A, Homey B, Lauerma A, Arai N, Gallo RL, Digiovanni J, Gilliet M. Plasmacytoid dendritic cells sense skin injury and promote wound healing through type I interferons. ACTA ACUST UNITED AC 2010; 207:2921-30. [PMID: 21115688 PMCID: PMC3005239 DOI: 10.1084/jem.20101102] [Citation(s) in RCA: 259] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Cutaneous injury in mice drives transient TLR7- and TLR9-mediated production of type I interferon by plasmacytoid dendritic cells, which is required for re-epithelialization of the skin. Plasmacytoid dendritic cells (pDCs) are specialized type I interferon (IFN-α/β)–producing cells that express intracellular toll-like receptor (TLR) 7 and TLR9 and recognize viral nucleic acids in the context of infections. We show that pDCs also have the ability to sense host-derived nucleic acids released in common skin wounds. pDCs were found to rapidly infiltrate both murine and human skin wounds and to transiently produce type I IFNs via TLR7- and TLR9-dependent recognition of nucleic acids. This process was critical for the induction of early inflammatory responses and reepithelization of injured skin. Cathelicidin peptides, which facilitate immune recognition of released nucleic acids by promoting their access to intracellular TLR compartments, were rapidly induced in skin wounds and were sufficient but not necessary to stimulate pDC activation and type I IFN production. These data uncover a new role of pDCs in sensing tissue damage and promoting wound repair at skin surfaces.
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Affiliation(s)
- Josh Gregorio
- Department of Immunology, the University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA
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Oyoshi MK, Larson RP, Ziegler SF, Geha RS. Mechanical injury polarizes skin dendritic cells to elicit a T(H)2 response by inducing cutaneous thymic stromal lymphopoietin expression. J Allergy Clin Immunol 2010; 126:976-84, 984.e1-5. [PMID: 21050944 PMCID: PMC3085022 DOI: 10.1016/j.jaci.2010.08.041] [Citation(s) in RCA: 215] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2010] [Revised: 08/10/2010] [Accepted: 08/17/2010] [Indexed: 12/11/2022]
Abstract
BACKGROUND Atopic dermatitis is characterized by scratching and by T(H)2-dominated immune response to cutaneously introduced antigens. Antigen application to skin mechanically injured by tape stripping results in T(H)2-dominated skin inflammation. OBJECTIVE To examine the effect of tape stripping on the capacity of skin dendritic cells (DCs) to polarize T cells toward a T(H)2 phenotype. METHODS CD11c(+) DCs were isolated from skin of BALB/c or C57BL/6 mice. Fluorescein isothiocyanate (FITC)(+) and FITC(-) DCs were isolated from draining lymph nodes (DLNs) 24 hours after painting the skin with FITC. DCs were assessed for their ability to induce cytokine secretion by ovalbumin-stimulated naive CD4(+) T cells from T cell receptor-ovalbumin transgenic DO11.10 mice. Cytokine mRNA levels were examined by quantitative PCR. RESULTS Dendritic cells isolated from the skin of wild-type, but not thymic stromal lymphopoietin (TSLP) receptor(-/-) or IL-10(-/-), mice 6 hours after tape stripping elicited significantly more IL-4 and IL-13 and significantly less IFN-γ production by CD4(+) cells than DCs isolated from unmanipulated skin, and expressed significantly more mRNA for the T(H)2 skewing molecules IL-10, Jagged1, and Jagged2, but significantly less mRNA for the T(H)1 skewing cytokine IL-12. CD11c(+)FITC(+) cells isolated from DLNs of shaved and tape stripped skin of wild-type, but not TSLP receptor(-/-) or IL-10(-/-), mice polarized T cells significantly more toward T(H)2 and expressed significantly more IL-10, Jagged1, and Jagged2 mRNA than CD11c(+)FITC(+) cells isolated from DLNs of shaved skin. Tape stripping significantly increased TSLP levels in the skin, and TSLP was shown to play an essential role in the T(H)2 polarization of skin DCs by tape stripping. CONCLUSIONS Tape stripping upregulates TSLP levels in the skin, which polarizes skin DCs to elicit a T(H)2 response via the induction of IL-10.
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Affiliation(s)
- Michiko K. Oyoshi
- Division of Immunology, Children’s Hospital and Department of Pediatrics, Harvard Medical School, Boston, MA 02115
| | - Ryan P. Larson
- Department of Immunology, University of Washington School of Medicine, Seattle, WA 98185
- Immunology Program, Benaroya Research Institute at Virginia Mason, Seattle, WA 98101
| | - Steven F. Ziegler
- Department of Immunology, University of Washington School of Medicine, Seattle, WA 98185
- Immunology Program, Benaroya Research Institute at Virginia Mason, Seattle, WA 98101
| | - Raif S. Geha
- Division of Immunology, Children’s Hospital and Department of Pediatrics, Harvard Medical School, Boston, MA 02115
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Abstract
Atopic dermatitis (AD) is a paradigmatic skin disease in which multiple gene-gene and gene-environment interactions play a pivotal role. Although the complex pathophysiologic network of AD explains the large spectrum of risk and trigger factors, it is far from being comprehensively understood. Hence, genetic modifications underlying the dysfunction of the epidermal skin barrier as well as the close interaction of innate and adaptive immune mechanisms were the focus of intensive research studies. This review aims to summarize the most recent findings in this field.
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Oyoshi MK, Murphy GF, Geha RS. Filaggrin-deficient mice exhibit TH17-dominated skin inflammation and permissiveness to epicutaneous sensitization with protein antigen. J Allergy Clin Immunol 2009; 124:485-93, 493.e1. [PMID: 19665780 DOI: 10.1016/j.jaci.2009.05.042] [Citation(s) in RCA: 183] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2009] [Revised: 05/20/2009] [Accepted: 05/22/2009] [Indexed: 01/17/2023]
Abstract
BACKGROUND Filaggrin is important for skin barrier function and is mutated in 15% to 20% of patients with atopic dermatitis. OBJECTIVE To examine whether filaggrin deficiency predisposes to skin inflammation and epicutaneous sensitization with protein antigen. METHODS Skin histology in filaggrin-deficient flaky tail (ft)/ft mice and wild-type controls was assessed by Hematoxylin and Eosin (H&E) staining and immunohistochemistry. Cytokine mRNA expression was examined by quantitative RT-PCR. Serum antibody levels and splenocyte secretion of cytokines were measured by ELISA. RESULTS The ft/ft mice developed eczematous skin lesions after age 28 weeks and a progressive increase in serum IgE and IgG(1) levels. Normal-appearing skin from 8-week-old ft/ft mice had epidermal thickening and increased dermal infiltration with CD4(+) cells and expression of mRNA for IL-17, IL-6, and IL-23, but not IL-4, IL-13, or IFN-gamma. Lesional skin of 32-week-old ft/ft mice exhibited qualitatively similar, but more pronounced, changes, and elevated IL-4 mRNA levels. Epicutaneous application of ovalbumin to shaved skin of 8-week-old ft/ft mice, but not WT mice, resulted in increased epidermal thickening, dermal infiltration by CD4(+) cells but not eosinophils, and expression of IL-17, IL-6, IL-23, IL-4, and IFN-gamma, but not IL-5 or IL-13, mRNA. Splenocytes from epicutaneously sensitized ft/ft mice, but not controls, secreted cytokines in response to ovalbumin stimulation, and their sera, but not those of controls, contained ovalbumin-specific IgE and IgG(1) antibodies. CONCLUSION Filaggrin-deficient mice exhibit T(H)17-dominated skin inflammation and eczematous changes with age, and are permissive to epicutaneous sensitization with protein antigen.
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Affiliation(s)
- Michiko K Oyoshi
- Division of Immunology, Department of Pediatrics, Harvard Medical School, Children's Hospital, Boston, Mass 02115, USA
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