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Lokya V, Parmar S, Pandey AK, Sudini HK, Huai D, Ozias-Akins P, Foyer CH, Nwosu CV, Karpinska B, Baker A, Xu P, Liao B, Mir RR, Chen X, Guo B, Nguyen HT, Kumar R, Bera SK, Singam P, Kumar A, Varshney RK, Pandey MK. Prospects for developing allergen-depleted food crops. THE PLANT GENOME 2023; 16:e20375. [PMID: 37641460 DOI: 10.1002/tpg2.20375] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 06/08/2023] [Accepted: 07/21/2023] [Indexed: 08/31/2023]
Abstract
In addition to the challenge of meeting global demand for food production, there are increasing concerns about food safety and the need to protect consumer health from the negative effects of foodborne allergies. Certain bio-molecules (usually proteins) present in food can act as allergens that trigger unusual immunological reactions, with potentially life-threatening consequences. The relentless working lifestyles of the modern era often incorporate poor eating habits that include readymade prepackaged and processed foods, which contain additives such as peanuts, tree nuts, wheat, and soy-based products, rather than traditional home cooking. Of the predominant allergenic foods (soybean, wheat, fish, peanut, shellfish, tree nuts, eggs, and milk), peanuts (Arachis hypogaea) are the best characterized source of allergens, followed by tree nuts (Juglans regia, Prunus amygdalus, Corylus avellana, Carya illinoinensis, Anacardium occidentale, Pistacia vera, Bertholletia excels), wheat (Triticum aestivum), soybeans (Glycine max), and kidney beans (Phaseolus vulgaris). The prevalence of food allergies has risen significantly in recent years including chance of accidental exposure to such foods. In contrast, the standards of detection, diagnosis, and cure have not kept pace and unfortunately are often suboptimal. In this review, we mainly focus on the prevalence of allergies associated with peanut, tree nuts, wheat, soybean, and kidney bean, highlighting their physiological properties and functions as well as considering research directions for tailoring allergen gene expression. In particular, we discuss how recent advances in molecular breeding, genetic engineering, and genome editing can be used to develop potential low allergen food crops that protect consumer health.
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Affiliation(s)
- Vadthya Lokya
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
| | - Sejal Parmar
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
| | - Arun K Pandey
- College of Life Science of China Jiliang University (CJLU), Hangzhou, China
| | - Hari K Sudini
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
| | - Dongxin Huai
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, China
| | - Peggy Ozias-Akins
- Horticulture Department, The University of Georgia Tifton Campus, Tifton, GA, USA
| | - Christine H Foyer
- School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, UK
| | | | - Barbara Karpinska
- School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, UK
| | - Alison Baker
- Centre for Plant Sciences and School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Pei Xu
- College of Life Science of China Jiliang University (CJLU), Hangzhou, China
| | - Boshou Liao
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, China
| | - Reyazul Rouf Mir
- Division of Genetics and Plant Breeding, Faculty of Agriculture, Sher-e-Kashmir University of Agricultural Sciences and Technology, Srinagar, India
| | - Xiaoping Chen
- Guangdong Provincial Key Laboratory for Crops Genetic Improvement, Crops Research Institute of Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Baozhu Guo
- USDA-ARS, Crop Genetics and Breeding Research Unit, Tifton, GA, USA
| | - Henry T Nguyen
- Division of Plant Sciences and National Center for Soybean Biotechnology, University of Missouri, Columbia, MO, USA
| | - Rakesh Kumar
- Department of Life Sciences, Central University of Karnataka, Gulbarga, India
| | | | - Prashant Singam
- Department of Genetics, Osmania University, Hyderabad, India
| | - Anirudh Kumar
- Central Tribal University of Andhra Pradesh, Vizianagaram, Andhra Pradesh, India
| | - Rajeev K Varshney
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
- State Agricultural Biotechnology Centre, Crop Research Innovation Centre, Food Futures Institute, Murdoch University, Murdoch, Western Australia, Australia
| | - Manish K Pandey
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
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Roberts J, Chevalier A, Hawerkamp HC, Yeow A, Matarazzo L, Schwartz C, Hams E, Fallon PG. Retinoic Acid-Related Orphan Receptor α Is Required for Generation of Th2 Cells in Type 2 Pulmonary Inflammation. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2023; 211:626-632. [PMID: 37387671 PMCID: PMC10404816 DOI: 10.4049/jimmunol.2200896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 06/08/2023] [Indexed: 07/01/2023]
Abstract
The transcription factor retinoic acid-related orphan receptor α (RORα) is important in regulating several physiological functions, such as cellular development, circadian rhythm, metabolism, and immunity. In two in vivo animal models of type 2 lung inflammation, Nippostrongylus brasiliensis infection and house dust mite (HDM) sensitization, we show a role for Rora in Th2 cellular development during pulmonary inflammation. N. brasiliensis infection and HDM challenge induced an increase in frequency of Rora-expressing GATA3+CD4 T cells in the lung. Using staggerer mice, which have a ubiquitous deletion of functional RORα, we generated bone marrow chimera mice, and we observed a delayed worm expulsion and reduced frequency in the expansion of Th2 cells and innate lymphoid type 2 cells (ILC2s) in the lungs after N. brasiliensis infection. ILC2-deficient mouse (Rorafl/flIl7raCre) also had delayed worm expulsion with associated reduced frequency of Th2 cells and ILC2s in the lungs after N. brasiliensis infection. To further define the role for Rora-expressing Th2 cells, we used a CD4-specific Rora-deficient mouse (Rorafl/flCD4Cre), with significantly reduced frequency of lung Th2 cells, but not ILC2, after N. brasiliensis infection and HDM challenge. Interestingly, despite the reduction in pulmonary Th2 cells in Rorafl/flCD4Cre mice, this did not impact the expulsion of N. brasiliensis after primary and secondary infection, or the generation of lung inflammation after HDM challenge. This study demonstrates a role for RORα in Th2 cellular development during pulmonary inflammation that could be relevant to the range of inflammatory diseases in which RORα is implicated.
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Affiliation(s)
- Joseph Roberts
- School of Medicine, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Anne Chevalier
- School of Medicine, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Heike C. Hawerkamp
- School of Medicine, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Aoife Yeow
- School of Medicine, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Laura Matarazzo
- School of Medicine, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Christian Schwartz
- Mikrobiologisches Institut–Klinische Mikrobiologie, Immunologie und Hygiene, Universitätsklinikum Erlangen and Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
- Medical Immunology Campus Erlangen, Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Emily Hams
- School of Medicine, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Padraic G. Fallon
- School of Medicine, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
- Trinity Translational Medicine Institute, Trinity College Dublin, Dublin, Ireland
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3
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Hansakon A, Jeerawattanawart S, Angkasekwinai P. Differential and cooperative effects of IL-25 and IL-33 on T helper cells contribute to cryptococcal virulence and brain infection. Sci Rep 2023; 13:9895. [PMID: 37337050 DOI: 10.1038/s41598-023-37158-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 06/16/2023] [Indexed: 06/21/2023] Open
Abstract
The epithelial cell-derived cytokines IL-33 and IL-25 are important mediators in driving type-2 inflammation during C. neoformans infection. Nevertheless, the impact of these cytokines in regulating host T helper cell response during C. neoformans infection is still unclear. We observed that C. neoformans infection promoted a predominant increase of T helper cells that co-expressed IL-25 and IL-33 receptors within the lung during the late infection phase. A comparative transcriptomic analysis of effector T helper cells co-treated with IL-25 and IL-33 revealed a cooperative effect of these cytokines in promoting IL-13 gene expression. Without IL-25 receptor signaling, IL-33 treatment upregulated Th1-associated genes and genes associated with nucleotide metabolism. By contrast, IL-25 had a unique effect in enhancing type-2 cytokines IL-5 and IL-9 and chemokine CCL24, as well as genes in the pathways that are associated with L-arginine metabolisms. Interestingly, this pathogenic T helper cell population that expressed IL-25 and IL-33 receptors was greatly enriched in mice that were infected with high cryptococcal virulence and associated with fungal burdens in the brain. Therefore, our data further provide the additional function of IL-25 and IL-33 in potentiating cryptococcal brain dissemination.
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Affiliation(s)
- Adithap Hansakon
- Department of Medical Technology, Faculty of Allied Health Sciences, Thammasat University, Pathum Thani, 12120, Thailand
- Chulabhorn International College of Medicine, Thammasat University, Pathum Thani, 12120, Thailand
| | - Siranart Jeerawattanawart
- Department of Medical Technology, Faculty of Allied Health Sciences, Thammasat University, Pathum Thani, 12120, Thailand
- Graduate Program in Biomedical Science, Faculty of Allied Health Sciences, Thammasat University, Pathum Thani, 12120, Thailand
| | - Pornpimon Angkasekwinai
- Department of Medical Technology, Faculty of Allied Health Sciences, Thammasat University, Pathum Thani, 12120, Thailand.
- Research Unit in Molecular Pathogenesis and Immunology of Infectious Diseases, Thammasat University, Pathum Thani, 12120, Thailand.
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4
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Prakash A, Medved J, Arneja A, Niebuhr C, Li AN, Tarrah S, Boscia AR, Burnett ED, Singh A, Salazar JE, Xu W, Santhanakrishnan M, Hendrickson JE, Luckey CJ. Class switching is differentially regulated in RBC alloimmunization and vaccination. Transfusion 2023; 63:826-838. [PMID: 36907655 PMCID: PMC10851675 DOI: 10.1111/trf.17301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 01/24/2023] [Accepted: 01/24/2023] [Indexed: 03/13/2023]
Abstract
BACKGROUND Studies of human patients have shown that most anti-RBC alloantibodies are IgG1 or IgG3 subclasses, although it is unclear why transfused RBCs preferentially drive these subclasses over others. Though mouse models allow for the mechanistic exploration of class-switching, previous studies of RBC alloimmunization in mice have focused more on the total IgG response than the relative distribution, abundance, or mechanism of IgG subclass generation. Given this major gap, we compared the IgG subclass distribution generated in response to transfused RBCs relative to protein in alum vaccination, and determined the role of STAT6 in their generation. STUDY DESIGN AND METHODS WT mice were either immunized with Alum/HEL-OVA or transfused with HOD RBCs and levels of anti-HEL IgG subtypes were measured using end-point dilution ELISAs. To study the role of STAT6 in IgG class-switching, we first generated and validated novel STAT6 KO mice using CRISPR/cas9 gene editing. STAT6 KO mice were then transfused with HOD RBCs or immunized with Alum/HEL-OVA, and IgG subclasses were quantified by ELISA. RESULTS When compared with antibody responses to Alum/HEL-OVA, transfusion of HOD RBCs induced lower levels of IgG1, IgG2b, and IgG2c but similar levels of IgG3. Class switching to most IgG subtypes remained largely unaffected in STAT6 deficient mice in response to HOD RBC transfusion, with the one exception being IgG2b. In contrast, STAT6 deficient mice showed altered levels of all IgG subtypes following Alum vaccination. DISCUSSION Our results show that anti-RBC class-switching occurs via alternate mechanisms when compared with the well-studied immunogen alum vaccination.
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Affiliation(s)
- Anupam Prakash
- Department of Pathology, University of Virginia, Charlottesville, Virginia, USA
| | - Jelena Medved
- Department of Pathology, University of Virginia, Charlottesville, Virginia, USA
| | - Abhinav Arneja
- Department of Pathology, University of Virginia, Charlottesville, Virginia, USA
| | - Conrad Niebuhr
- Department of Pathology, University of Virginia, Charlottesville, Virginia, USA
| | - Andria N. Li
- Department of Pathology, University of Virginia, Charlottesville, Virginia, USA
| | - Soraya Tarrah
- Department of Pathology, University of Virginia, Charlottesville, Virginia, USA
| | - Alexis R. Boscia
- Department of Pathology, University of Virginia, Charlottesville, Virginia, USA
| | - Emily D. Burnett
- Department of Pathology, University of Virginia, Charlottesville, Virginia, USA
| | - Aanika Singh
- Department of Pathology, University of Virginia, Charlottesville, Virginia, USA
| | - Juan E. Salazar
- Department of Pathology, University of Virginia, Charlottesville, Virginia, USA
| | - Wenhao Xu
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, Virginia, USA
| | - Manjula Santhanakrishnan
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Jeanne E. Hendrickson
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Chance John Luckey
- Department of Pathology, University of Virginia, Charlottesville, Virginia, USA
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5
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Prakash A, Medved J, Arneja A, Niebuhr C, Li AN, Tarrah S, Boscia AR, Burnett ED, Singh A, Salazar JE, Xu W, Santhanakrishnan M, Hendrickson JE, Luckey CJ. Class switching is differentially regulated in RBC alloimmunization and vaccination. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.11.523608. [PMID: 36712006 PMCID: PMC9882062 DOI: 10.1101/2023.01.11.523608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Background Studies of human patients have shown that most anti-RBC alloantibodies are IgG1 or IgG3 subclasses, though it is unclear why transfused RBCs preferentially drive these subclasses over others. Though mouse models allow for the mechanistic exploration of class-switching, previous studies of RBC alloimmunization in mice have focused more on the total IgG response than the relative distribution, abundance, or mechanism of IgG subclass generation. Given this major gap, we compared the IgG subclass distribution generated in response to transfused RBCs relative to protein in alum vaccination, and determined the role of STAT6 in their generation. Study Design and Methods WT mice were either immunized with Alum/HEL-OVA or transfused with HOD RBCs and levels of anti-HEL IgG subtypes were measured using end-point dilution ELISAs. To study the role of STAT6 in IgG class-switching, we first generated and validated novel STAT6 KO mice using CRISPR/cas9 gene editing. STAT6 KO mice were then transfused with HOD RBCs or immunized with Alum/HEL-OVA, and IgG subclasses were quantified by ELISA. Results When compared to antibody responses to Alum/HEL-OVA, transfusion of HOD RBCs induced lower levels of IgG1, IgG2b and IgG2c but similar levels of IgG3. Class switching to most IgG subtypes remained largely unaffected in STAT6 deficient mice in response to HOD RBC transfusion, with the one exception being IgG2b. In contrast, STAT6 deficient mice showed altered levels of all IgG subtypes following Alum vaccination. Discussion Our results show that anti-RBC class-switching occurs via alternate mechanisms when compared to the well-studied immunogen alum vaccination.
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6
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Crosstalk between ILC2s and Th2 CD4+ T Cells in Lung Disease. J Immunol Res 2022; 2022:8871037. [PMID: 35592688 PMCID: PMC9113865 DOI: 10.1155/2022/8871037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 03/30/2022] [Accepted: 04/18/2022] [Indexed: 12/03/2022] Open
Abstract
Cytokine secretion, such as interleukin-4 (IL-4), IL-5, IL-9, IL-13, and amphiregulin (Areg), by type 2 innate lymphoid cells (ILC2s) is indispensable for homeostasis, remodeling/repairing tissue structure, inflammation, and tumor immunity. Often viewed as the innate cell surrogate of T helper type 2 (Th2) cells, ILC2s not only secrete the same type 2 cytokines, but are also inextricably related to CD4+T cells in terms of cell origin and regulatory factors, bridging between innate and adaptive immunity. ILC2s interact with CD4+T cells to play a leading role in a variety of diseases through secretory factors. Here, we review the latest progress on ILC2s and CD4+T cells in the lung, the close relationship between the two, and their relevance in the lung disease and immunity. This literature review aids future research in pulmonary type 2 immune diseases and guides innovative treatment approaches for these diseases.
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7
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Xiao Q, Han X, Liu G, Zhou D, Zhang L, He J, Xu H, Zhou P, Yang Q, Chen J, Zhou J, Jiang G, Yao Z. Adenosine restrains ILC2-driven allergic airway inflammation via A2A receptor. Mucosal Immunol 2022; 15:338-350. [PMID: 34921233 DOI: 10.1038/s41385-021-00475-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 11/05/2021] [Accepted: 12/05/2021] [Indexed: 02/04/2023]
Abstract
Although group 2 Innate Lymphoid Cells (ILC2s) play important roles in driving the pathogenesis of allergic airway inflammation, the molecular mechanisms regulating ILC2 responses remain to be fully elucidated. Adenosine signaling is emerging as an important factor to limit excessive inflammation and tissue damage, its role in ILC2-driven airway inflammation remains to be understood. Here we identify adenosine as a negative regulator of ILC2s and allergic airway inflammation. Elevation of adenosine was observed in lungs after protease papain challenge. Adenosine receptor A2A was abundantly expressed in lung ILC2s. The adenosine analog NECA significantly suppress ILC2s responses and relieved airway inflammation induced by IL-33 or papain. Conversely, blockage of adenosine synthesis by CD73 inhibitor APCP or deficiency of A2A aggravated murine airway inflammation. Adoptive transfer of ILC2s into immunodeficiency NCG mice demonstrated that the regulation of ILC2 by adenosine was cell intrinsic. Mechanistic studies showed that the effects of adenosine on ILC2s were associated with changes in transcriptional profiling, and the elevation of intracellular cAMP and resulted NF-κB downregulation. These observations indicate that adenosine-A2A signaling is a negative regulator of ILC2s, which confers protection against airway inflammation and represents a novel therapeutic target for controlling asthma.
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Affiliation(s)
- Qiang Xiao
- Key Laboratory of Immune Microenvironment and Disease of the Ministry of Education, Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China.,Department of Clinical laboratory, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, China
| | - Xu Han
- Key Laboratory of Immune Microenvironment and Disease of the Ministry of Education, Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Gaoyu Liu
- Key Laboratory of Immune Microenvironment and Disease of the Ministry of Education, Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Dongmei Zhou
- Key Laboratory of Immune Microenvironment and Disease of the Ministry of Education, Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Lijuan Zhang
- Key Laboratory of Immune Microenvironment and Disease of the Ministry of Education, Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Juan He
- Key Laboratory of Immune Microenvironment and Disease of the Ministry of Education, Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China.,Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Haixu Xu
- Key Laboratory of Immune Microenvironment and Disease of the Ministry of Education, Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Pan Zhou
- Key Laboratory of Immune Microenvironment and Disease of the Ministry of Education, Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Quan Yang
- Key Laboratory of Immunology, Sino-French Hoffmann Institute, School of Basic Medical Sciences; Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Jiangfan Chen
- The Molecular Neuropharmacology Laboratory and the Eye-Brain Research Center, The State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
| | - Jie Zhou
- Key Laboratory of Immune Microenvironment and Disease of the Ministry of Education, Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China.
| | - Guanmin Jiang
- Department of Clinical laboratory, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, China.
| | - Zhi Yao
- Key Laboratory of Immune Microenvironment and Disease of the Ministry of Education, Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China.
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8
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Dacic M, Shibu G, Rogatsky I. Physiological Convergence and Antagonism Between GR and PPARγ in Inflammation and Metabolism. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1390:123-141. [PMID: 36107316 DOI: 10.1007/978-3-031-11836-4_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Nuclear receptors (NRs) are transcription factors that modulate gene expression in a ligand-dependent manner. The ubiquitously expressed glucocorticoid receptor (GR) and peroxisome proliferator-activated receptor gamma (PPARγ) represent steroid (type I) and non-steroid (type II) classes of NRs, respectively. The diverse transcriptional and physiological outcomes of their activation are highly tissue-specific. For example, in subsets of immune cells, such as macrophages, the signaling of GR and PPARγ converges to elicit an anti-inflammatory phenotype; in contrast, in the adipose tissue, their signaling can lead to reciprocal metabolic outcomes. This review explores the cooperative and divergent outcomes of GR and PPARγ functions in different cell types and tissues, including immune cells, adipose tissue and the liver. Understanding the coordinated control of these NR pathways should advance studies in the field and potentially pave the way for developing new therapeutic approaches to exploit the GR:PPARγ crosstalk.
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Affiliation(s)
- Marija Dacic
- Hospital for Special Surgery Research Institute, The David Rosenzweig Genomics Center, New York, NY, USA
- Graduate Program in Physiology, Biophysics and Systems Biology, Weill Cornell Graduate School of Medical Sciences, New York, NY, USA
| | - Gayathri Shibu
- Hospital for Special Surgery Research Institute, The David Rosenzweig Genomics Center, New York, NY, USA
- Graduate Program in Immunology and Microbial Pathogenesis, Weill Cornell Graduate School of Medical Sciences, New York, NY, USA
| | - Inez Rogatsky
- Hospital for Special Surgery Research Institute, The David Rosenzweig Genomics Center, New York, NY, USA.
- Graduate Program in Immunology and Microbial Pathogenesis, Weill Cornell Graduate School of Medical Sciences, New York, NY, USA.
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9
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Kong Y, Li HD, Wang D, Gao X, Yang C, Li M, Chang T, Liu Q. Group 2 innate lymphoid cells suppress the pathology of neuromyelitis optica spectrum disorder. FASEB J 2021; 35:e21856. [PMID: 34606651 DOI: 10.1096/fj.202100673r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 07/13/2021] [Accepted: 07/29/2021] [Indexed: 11/11/2022]
Abstract
Neuromyelitis optica spectrum disorder (NMOSD) is a severe central nervous system (CNS) autoimmune disease that primarily damages the optic nerves and spinal cord. Group 2 innate lymphoid cells (ILC2) are potent producers of type 2 cytokines that orchestrate immune and inflammatory responses. However, the role of ILC2 in CNS autoimmune diseases remains unknown. In patients with NMOSD, we identified a significant reduction of ILC2 in peripheral blood, which was correlated with disease severity. Using a mouse model of NMOSD induced by intracerebral injection of NMOSD-IgG with complement, we found CNS infiltration of ILC2 mainly expressing interleukin (IL)-5 and IL-13. The depletion of ILC2 led to increased CNS lesion volume, reduced CNS glucose metabolism, and augmented astrocyte injury and demyelination. The exacerbated NMOSD pathology was accompanied by increased accumulation of Iba1+ cells and complement activity in CNS lesions. In addition, the expansion of ILC2 using IL-33 attenuated NMO pathology. Collectively, these findings suggest a beneficial role of ILC2 in NMOSD, which deserves further investigation for future design of immune therapies to treat patients with NMOSD.
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Affiliation(s)
- Ying Kong
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Han-Dong Li
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Dan Wang
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Xiaolin Gao
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Chunsheng Yang
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Minshu Li
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China.,Key Laboratory of Post-neurotrauma Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Ministry of Education, Tianjin, China
| | - Ting Chang
- Department of Neurology, Tangdu Hospital, the Fourth Military Medical University, Xi'an, China
| | - Qiang Liu
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China.,Key Laboratory of Post-neurotrauma Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Ministry of Education, Tianjin, China
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10
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De Pasquale C, Campana S, Bonaccorsi I, Carrega P, Ferlazzo G. ILC in chronic inflammation, cancer and targeting with biologicals. Mol Aspects Med 2021; 80:100963. [PMID: 33726947 DOI: 10.1016/j.mam.2021.100963] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 11/11/2020] [Accepted: 03/04/2021] [Indexed: 12/14/2022]
Abstract
Since their discovery, Innate Lymphoid Cells (ILC) have emerged as important effector cells, serving multiple roles in maintaining tissue homeostasis and responding to tissue insults. As such, dysregulations of their function and distribution have been observed in a variety of immune-mediated diseases, suggesting a specific role for ILC in the pathophysiology of several disorders including chronic inflammation and cancer. Here, we provide an updated view on ILC biology dissecting their pathological or protective contribution in chronic inflammatory diseases such as multiple sclerosis, inflammatory bowel diseases, psoriasis, rheumatoid arthritis, asthma and COPD, atherosclerosis, also exploring ILC role in tumor surveillance and progression. Throughout the review, we will also highlight how the potential dual role of these cells for protective or pathogenic immunity in many inflammatory diseases makes them interesting targets for the development of novel therapeutic strategies, particularly promising.
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Affiliation(s)
- Claudia De Pasquale
- Laboratory of Immunology and Biotherapy, Department of Human Pathology, University of Messina, Messina, Italy
| | - Stefania Campana
- Laboratory of Immunology and Biotherapy, Department of Human Pathology, University of Messina, Messina, Italy
| | - Irene Bonaccorsi
- Laboratory of Immunology and Biotherapy, Department of Human Pathology, University of Messina, Messina, Italy; Cell Factory Center and Division of Clinical Pathology, University Hospital Policlinico G.Martino, Messina, Italy
| | - Paolo Carrega
- Laboratory of Immunology and Biotherapy, Department of Human Pathology, University of Messina, Messina, Italy
| | - Guido Ferlazzo
- Laboratory of Immunology and Biotherapy, Department of Human Pathology, University of Messina, Messina, Italy; Cell Factory Center and Division of Clinical Pathology, University Hospital Policlinico G.Martino, Messina, Italy.
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11
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Xiao Q, He J, Lei A, Xu H, Zhang L, Zhou P, Jiang G, Zhou J. PPARγ enhances ILC2 function during allergic airway inflammation via transcription regulation of ST2. Mucosal Immunol 2021; 14:468-478. [PMID: 32811992 DOI: 10.1038/s41385-020-00339-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/21/2020] [Accepted: 07/26/2020] [Indexed: 02/07/2023]
Abstract
Group 2 innate lymphoid cells (ILC2s) represent the major player during hyperresponsive airway inflammation. Peroxisome proliferator-activated receptor-γ (PPARγ) was highly expressed on ILC2 and its potential role in asthma has been suggested. However, the detailed mechanism underlying the effects of PPARγ on ILC2-induced airway inflammation remains to be fully understood. Here we identified PPARγ as a positive regulator of lung ILC2. Expression of PPARγ on ILC2 was dramatically induced upon interleukin-33 (IL-33) challenge. Deficiency of PPARγ in hematopoietic system in mice (PPARγfl/fl Vav1Cre) significantly impaired the function of ILC2 in lung, which led to apparent alleviation of airway inflammation in response to IL-33 or Papain challenge, when compared with those in PPARγfl/fl littermates control. Mechanistic studies identified IL-33 receptor ST2 as a transcriptional target of PPARγ. Overexpression of ST2 rescued the functional defects of ILC2 lacking PPARγ. Collectively, these results demonstrated PPARγ as an important regulator of ILC2 during allergic airway inflammation, which sheds new lights on the importance of PPARγ in asthma.
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Affiliation(s)
- Qiang Xiao
- Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Immunology, School of Basic Medical Sciences, Tianjin, China.,Department of Clinical laboratory, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, China
| | - Juan He
- Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Immunology, School of Basic Medical Sciences, Tianjin, China.,Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Aihua Lei
- Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hengyang, China
| | - Haixu Xu
- Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Immunology, School of Basic Medical Sciences, Tianjin, China
| | - Lijuan Zhang
- Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Immunology, School of Basic Medical Sciences, Tianjin, China
| | - Pan Zhou
- Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Immunology, School of Basic Medical Sciences, Tianjin, China
| | - Guanmin Jiang
- Department of Clinical laboratory, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, China
| | - Jie Zhou
- Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Immunology, School of Basic Medical Sciences, Tianjin, China.
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12
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Li Y, Wang W, Ying S, Lan F, Zhang L. A Potential Role of Group 2 Innate Lymphoid Cells in Eosinophilic Chronic Rhinosinusitis With Nasal Polyps. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2021; 13:363-374. [PMID: 33733633 PMCID: PMC7984954 DOI: 10.4168/aair.2021.13.3.363] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 10/28/2020] [Accepted: 11/17/2020] [Indexed: 12/17/2022]
Abstract
Chronic rhinosinusitis with nasal polyps (CRSwNP), a type 2-based upper airway disease, is mainly characterized by high asthma comorbidity and recurrence after surgery. It has been shown that type 2 cytokines, including interleukin (IL)-4, IL-5, and IL-13 released from T helper 2 (Th2) cells as well as group 2 innate lymphoid cells (ILC2s), contribute to chronic inflammation of CRSwNP. This review summarizes recent progresses made in our understanding of ILC2 activity, particularly ILC2 accumulation at airway inflammation sites, cooperation with Th2 cells in aggravating the CRSwNP inflammatory process and interactions with regulatory T cells (Tregs) in resisting Tregs-mediated suppressive function in allergic inflammation. A better understanding of the biology of ILC2s should lay a good foundation in elucidating the pathogenesis of CRSwNP, and subsequently may lead to the development of new therapeutic strategies for the management of CRSwNP.
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Affiliation(s)
- Yan Li
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing Institute of Otorhinolaryngology, Key Laboratory of Otorhinolaryngology Head and Neck Surgery, Ministry of Education, Beijing Key Laboratory of Nasal Diseases, Beijing, China
| | - Wei Wang
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Sun Ying
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Feng Lan
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing Institute of Otorhinolaryngology, Key Laboratory of Otorhinolaryngology Head and Neck Surgery, Ministry of Education, Beijing Key Laboratory of Nasal Diseases, Beijing, China.
| | - Luo Zhang
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing Institute of Otorhinolaryngology, Key Laboratory of Otorhinolaryngology Head and Neck Surgery, Ministry of Education, Beijing Key Laboratory of Nasal Diseases, Beijing, China.
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13
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He J, Yang Q, Xiao Q, Lei A, Li X, Zhou P, Liu T, Zhang L, Shi K, Yang Q, Dong J, Zhou J. IRF-7 Is a Critical Regulator of Type 2 Innate Lymphoid Cells in Allergic Airway Inflammation. Cell Rep 2020; 29:2718-2730.e6. [PMID: 31775040 DOI: 10.1016/j.celrep.2019.10.077] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 08/16/2019] [Accepted: 10/18/2019] [Indexed: 12/12/2022] Open
Abstract
Allergic asthma is a highly prevalent airway disease triggered by hyperresponsiveness to inhaled allergens. Interferon regulatory factor 7 (IRF7) has been shown to be highly expressed in nasal aspirates from children with asthma. Type 2 innate lymphoid cells (ILC2s) represent the major player in allergic airway inflammation. The role of IRF7 in ILC2-driven asthma remains to be explored. Here, we report that IRF7 expression in murine lung ILC2s is dramatically induced upon papain or interleukin-33 (IL-33) stimulation. ILC2s from asthma patients display a much higher level of IRF7 than those from healthy donors. Deficiency of IRF7 in mice significantly impairs the expansion and function of lung ILC2s in multiple models of allergic asthma. Furthermore, the regulation of ILC2s by IRF7 is cell intrinsic and mediated by the transcription factor Bcl11b. These observations identify IRF7 as a regulator of lung ILC2s, which may have immunotherapeutic value in allergic asthma.
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Affiliation(s)
- Juan He
- Joint Program in Immunology, Affiliated Guangzhou Women and Children's Medical Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China; Key Laboratory of Immune Microenvironment and Disease of the Ministry of Education, Department of Immunology, School of Basic Sciences, Tianjin Medical University, Tianjin, China; Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Qiong Yang
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Qiang Xiao
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Aihua Lei
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Xing Li
- The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Pan Zhou
- Key Laboratory of Immune Microenvironment and Disease of the Ministry of Education, Department of Immunology, School of Basic Sciences, Tianjin Medical University, Tianjin, China
| | - Ting Liu
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Lijuan Zhang
- Key Laboratory of Immune Microenvironment and Disease of the Ministry of Education, Department of Immunology, School of Basic Sciences, Tianjin Medical University, Tianjin, China
| | - Kun Shi
- Department of Gynaecology, Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Quan Yang
- Key Laboratory of Immunology, Sino-French Hoffmann Institute, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, China
| | - Junchao Dong
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Jie Zhou
- Joint Program in Immunology, Affiliated Guangzhou Women and Children's Medical Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China; Key Laboratory of Immune Microenvironment and Disease of the Ministry of Education, Department of Immunology, School of Basic Sciences, Tianjin Medical University, Tianjin, China.
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14
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Kumar V. Innate lymphoid cell and adaptive immune cell cross-talk: A talk meant not to forget. J Leukoc Biol 2020; 108:397-417. [PMID: 32557732 DOI: 10.1002/jlb.4mir0420-500rrr] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 04/28/2020] [Accepted: 05/04/2020] [Indexed: 12/17/2022] Open
Abstract
Innate lymphoid cells (ILCs) are a relatively new class of innate immune cells with phenotypical characters of lymphocytes but genotypically or functionally behave as typical innate immune cells. They have been classically divided into 3 groups (group 1 ILCs or ILC1s, group 2 ILCs or ILC2s, and group 3 ILCs or ILC3s). They serve as the first line of defense against invading pathogens and allergens at mucosal surfaces. The adaptive immune response works effectively in association with innate immunity as innate immune cells serve as APCs to directly stimulate the adaptive immune cells (various sets of T and B cells). Additionally, innate immune cells also secrete various effector molecules, including cytokines or chemokines impacting the function, differentiation, proliferation, and reprogramming among adaptive immune cells to maintain immune homeostasis. Only superantigens do not require their processing by innate immune cells as they are recognized directly by T cells and B cells. Thus, a major emphasis of the current article is to describe the cross-talk between different ILCs and adaptive immune cells during different conditions varying from normal physiological situations to different infectious diseases to allergic asthma.
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Affiliation(s)
- V Kumar
- Children's Health Queensland Clinical Unit, School of Clinical Medicine, Faculty of Medicine, Mater Research, University of Queensland, Brisbane, Queensland, Australia.,School of Biomedical Sciences, Faculty of Medicine, University of Queensland, Brisbane, Queensland, Australia
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15
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Batyrova B, Luwaert F, Maravelia P, Miyabayashi Y, Vashist N, Stark JM, Soori SY, Tibbitt CA, Riese P, Coquet JM, Chambers BJ. PD-1 expression affects cytokine production by ILC2 and is influenced by peroxisome proliferator-activated receptor-γ. IMMUNITY INFLAMMATION AND DISEASE 2019; 8:8-23. [PMID: 31742928 PMCID: PMC7016838 DOI: 10.1002/iid3.279] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 11/03/2019] [Accepted: 11/06/2019] [Indexed: 12/25/2022]
Abstract
Introduction Innate lymphoid cells (ILCs) can provide early cytokine help against a variety of pathogens in the lungs and gastrointestinal tract. Type 2 ILC (ILC2) are comparable to T helper 2 cells found in the adaptive immune system, which secrete cytokines such as interleukin 5 (IL‐5) and IL‐13 and have been found to play roles in host defense against helminth infections and in allergic responses. Recent studies have identified that programmed cell death protein 1 (PD‐1) and peroxisome proliferator activated receptor‐γ (PPAR‐γ) are highly expressed by ILC2. We examined whether PD‐1 plays a role in ILC2 function and whether there was any connection between PD‐1 and PPAR‐γ Methods To ensure that only innate immune cells were present, ILC2 cells were examined from RAG1−/− and PD‐1−/−xRAG1−/− mice under steady‐state or following inoculation with IL‐33. We also tested ILC2 generated from bone marrow of RAG1−/− and PD‐1−/−xRAG1−/− mice for their production of cytokines. These in vitro‐derived ILC2 were also exposed to agonist and antagonist of PPAR‐γ. Results We found that ILC2 from PD‐1−/−xRAG1−/− mice had reduced frequencies of IL‐5 and IL‐13 producing cells both in vitro upon IL‐33 stimulation and in vivo following intraperitoneal administration of IL‐33 when compared with ILC2 from RAG1−/− mice. However, by adding IL‐2, IL‐25, and thymic stromal lymphopoietin to the in vitro cultures, the frequency of IL‐5 and IL‐13 expressing ILC2 from PD‐1−/−xRAG1−/− mice became similar to the frequency observed for ILC2 from RAG1−/− mice. In addition, PPAR‐γ agonists and antagonists were found to increase and decrease PD‐1 expression on ILC2 respectively. Conclusions These findings illustrate that chronic loss of PD‐1 plays a role in ILC2 function and PD‐1 expression can be modulated by PPAR‐γ.
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Affiliation(s)
- Banu Batyrova
- Department of Medicine, Centre for Infectious Medicine (CIM), Karolinska Institute, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Fien Luwaert
- Department of Medicine, Centre for Infectious Medicine (CIM), Karolinska Institute, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Panagiota Maravelia
- Department of Medicine, Centre for Infectious Medicine (CIM), Karolinska Institute, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Yuria Miyabayashi
- Department of Medicine, Centre for Infectious Medicine (CIM), Karolinska Institute, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Neha Vashist
- Department of Medicine, Centre for Infectious Medicine (CIM), Karolinska Institute, Karolinska University Hospital Huddinge, Stockholm, Sweden.,Department of Vaccinology and Applied Microbiology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Julian M Stark
- Department of Microbiology, Tumor and Cell Biology (MTC), Karolinska Institute, Stockholm, Sweden
| | - Sara Y Soori
- Department of Medicine, Centre for Infectious Medicine (CIM), Karolinska Institute, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Christopher A Tibbitt
- Department of Medicine, Centre for Infectious Medicine (CIM), Karolinska Institute, Karolinska University Hospital Huddinge, Stockholm, Sweden.,Department of Microbiology, Tumor and Cell Biology (MTC), Karolinska Institute, Stockholm, Sweden
| | - Peggy Riese
- Department of Vaccinology and Applied Microbiology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Jonathan M Coquet
- Department of Microbiology, Tumor and Cell Biology (MTC), Karolinska Institute, Stockholm, Sweden
| | - Benedict J Chambers
- Department of Medicine, Centre for Infectious Medicine (CIM), Karolinska Institute, Karolinska University Hospital Huddinge, Stockholm, Sweden
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16
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Lei A, Zhou J. Cell-surface molecule-mediated cell-cell interactions in the regulation of ILC2-driven allergic inflammation. Cell Mol Life Sci 2019; 76:4503-4510. [PMID: 31312878 PMCID: PMC11105661 DOI: 10.1007/s00018-019-03228-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 06/18/2019] [Accepted: 07/09/2019] [Indexed: 01/08/2023]
Abstract
Group 2 innate lymphoid cells (ILC2s) are a subset of innate immune cells that do not express antigen receptors. ILC2-mediated type 2 responses, which are mainly characterized by the production of interleukin (IL)-5 and IL-13, play key roles in inducing inflammation, protecting against infection, and maintaining tissue homeostasis. Although recent years have largely enhanced our understanding of the transcriptional networks and soluble mediators that regulate ILC2 development or function, emerging evidence suggests that ILC2s express a variety of cell-surface molecules and interact with themselves or other immune cells. These cell-cell interactions are essential in the modulation of ILC2 number and their type 2 cytokine production during ILC2-driven allergic inflammation. In this review, we summarize the extensive array of cell-surface molecules on ILC2s that mediate cell-cell interactions and their role in regulating ILC2 generation or function in the context of ILC2-induced allergic inflammation.
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Affiliation(s)
- Aihua Lei
- Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hengyang, 421001, Hunan, China
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, 421001, Hunan, China
| | - Jie Zhou
- Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, 22 Qixiangtai Road, Tianjin, 300070, China.
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17
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Claudio E, Wang H, Kamenyeva O, Tang W, Ha HL, Siebenlist U. IL-25 Orchestrates Activation of Th Cells via Conventional Dendritic Cells in Tissue to Exacerbate Chronic House Dust Mite-Induced Asthma Pathology. THE JOURNAL OF IMMUNOLOGY 2019; 203:2319-2327. [PMID: 31511356 DOI: 10.4049/jimmunol.1900254] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 08/08/2019] [Indexed: 12/21/2022]
Abstract
House dust mite (HDM) extract is a common trigger of asthma in humans. Chronic exposure to HDM also induces asthma-like pathology in mice. Allergic responses to HDM and other allergens are linked to release of IL-25, IL-33, and TSLP by epithelial cells; these cytokines, especially IL-33, target innate lymphoid cells type 2 to produce type 2 cytokines. To what extent and by what mechanisms IL-25 contributes to chronic HDM-induced pathology is not well understood. In humans, elevated levels of IL-25 appear to be associated with cases of uncontrolled asthma and exacerbated attacks. In this article, we demonstrate that blockade of IL-25 signaling in either lung conventional dendritic cells or in T cells resulted in similar decreases in production of IL-13 and IL-9 by T cells, reduced mast cell accumulation and tissue remodeling, and improved lung function but had only modest effects on eosinophilia. Stimulation of conventional dendritic cells by IL-25 promoted proximal accumulation of Th cells, and stimulation of Th cells by IL-25 locally promoted IL-13 and IL-9 production. IL-25 made notable contributions to chronic HDM-induced allergic asthma pathology by facilitating clustering and cross-stimulation of different cell types in tissue. Therapeutic targeting of IL-25 in combination with other treatments may be beneficial.
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Affiliation(s)
- Estefania Claudio
- Immune Activation Section, Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892; and
| | - Hongshan Wang
- Immune Activation Section, Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892; and
| | - Olena Kamenyeva
- Biologic Imaging Section, Research Technologies Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Wanhu Tang
- Immune Activation Section, Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892; and
| | - Hye-Lin Ha
- Immune Activation Section, Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892; and
| | - Ulrich Siebenlist
- Immune Activation Section, Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892; and
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18
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Han X, Bai S, Cui Y, Zhu W, Zhao N, Liu B. Essential role of CD4 + T cells for the activation of group 2 innate lymphoid cells during respiratory syncytial virus infection in mice. Immunotherapy 2019; 11:1303-1313. [PMID: 31478420 DOI: 10.2217/imt-2019-0084] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Aim: To investigate whether and how CD4+ T cells contribute to ILC2 activation during respiratory syncytial virus (RSV) infection. Methods: The methods of flow cytometry, quantitative PCR and ELISA were used in the present study. Results: Depletion of CD4+ T cells diminished the numbers of lung ILC2s as well as their ability to produce type 2 cytokines. CD4+ T cell-mediated ILC2 activation is related to IL-2. The main cellular source of IL-2 was CD4+ T cells. Depletion of CD4+ T cells decreased IL-2 levels in the lungs of RSV-infected mice. IL-2 can directly stimulate ILC2 proliferation and promote ILC2s to produce cytokines. Treatment of mice with neutralizing anti-IL-2 monoclonal antibodies diminished ILC2 activation. Conclusion: These results suggest that CD4+ T cells contribute to RSV-induced ILC2 activation partly via producing IL-2.
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Affiliation(s)
- Xu Han
- Department of Pathogenic Biology, School of Basic Medical Science, China Medical University, Shenyang, China.,Department of Medical Oncology, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Song Bai
- Department of Pathogenic Biology, School of Basic Medical Science, China Medical University, Shenyang, China
| | - Yulin Cui
- Department of Pathogenic Biology, School of Basic Medical Science, China Medical University, Shenyang, China
| | - Wenwen Zhu
- Department of Pathogenic Biology, School of Basic Medical Science, China Medical University, Shenyang, China
| | - Na Zhao
- Department of Pathogenic Biology, School of Basic Medical Science, China Medical University, Shenyang, China
| | - Beixing Liu
- Department of Pathogenic Biology, School of Basic Medical Science, China Medical University, Shenyang, China
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19
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Wallrapp A, Riesenfeld SJ, Burkett PR, Kuchroo VK. Type 2 innate lymphoid cells in the induction and resolution of tissue inflammation. Immunol Rev 2019; 286:53-73. [PMID: 30294962 DOI: 10.1111/imr.12702] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 08/08/2018] [Indexed: 12/14/2022]
Abstract
Type 2 immunity against pathogens is tightly regulated to ensure appropriate inflammatory responses that clear infection and prevent excessive tissue damage. Recent research has shown that type 2 innate lymphoid cells (ILC2s) contribute to steady-state tissue integrity and exert tissue-specific functions. However, upon exposure to inflammatory stimuli, they also initiate and amplify type 2 inflammation by inducing mucus production, eosinophilia, and Th2 differentiation. In this review, we discuss the regulation of ILC2 activation by transcription factors and metabolic pathways, as well as by extrinsic signals such as cytokines, lipid mediators, hormones, and neuropeptides. We also review recent discoveries about ILC2 plasticity and heterogeneity in different tissues, as revealed partly through single-cell RNA sequencing of transcriptional responses to various stimuli. Understanding the tissue-specific pathways that regulate ILC2 diversity and function is a critical step in the development of potential therapies for allergic diseases.
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Affiliation(s)
- Antonia Wallrapp
- Evergrande Center for Immunologic Diseases, Harvard Medical School and Brigham & Women's Hospital, Boston, Massachusetts
| | - Samantha J Riesenfeld
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, Massachusetts
| | - Patrick R Burkett
- Evergrande Center for Immunologic Diseases, Harvard Medical School and Brigham & Women's Hospital, Boston, Massachusetts.,Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham & Women's Hospital, Boston, Massachusetts
| | - Vijay K Kuchroo
- Evergrande Center for Immunologic Diseases, Harvard Medical School and Brigham & Women's Hospital, Boston, Massachusetts.,Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, Massachusetts.,Department of Neurology, Brigham & Women's Hospital, Boston, Massachusetts
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20
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Löser S, Smith KA, Maizels RM. Innate Lymphoid Cells in Helminth Infections-Obligatory or Accessory? Front Immunol 2019; 10:620. [PMID: 31024526 PMCID: PMC6467944 DOI: 10.3389/fimmu.2019.00620] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 03/08/2019] [Indexed: 01/14/2023] Open
Abstract
ILCs burst onto the immunological scene with their involvement in bacterial and helminth infections. As their influence has emerged, it has become clear that they play a fundamental role in regulating barrier tissue homeostasis and the immune response during inflammation. A subset of ILCs, ILC2s, has become the focus of attention for many helminth biologists-stepping into the limelight as both the elusive initiator and amplifier of the type-2 response. In many of the early reports, conclusions as to their function were based on experiments using unadapted parasites or immune-compromised hosts. In this review we re-examine the generation and function of type-2 ILCs in helminth infection and the extent to which their roles may be essential or redundant, in both primary and challenge infections. ILC2s will be discussed in terms of a broader innate network, which when in dialogue with adaptive immunity, allows the generation of the anti-parasite response. Finally, we will review how helminths manipulate ILC2 populations to benefit their survival, as well as dampen systemic inflammation in the host, and how this understanding may be used to improve strategies to control disease.
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Affiliation(s)
- Stephan Löser
- Wellcome Centre for Integrative Parasitology, Institute of Infection, Immunology and Inflammation, University of Glasgow, Glasgow, United Kingdom
| | - Katherine A Smith
- Cardiff Institute of Infection and Immunity, Cardiff University, Cardiff, United Kingdom.,Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Rick M Maizels
- Wellcome Centre for Integrative Parasitology, Institute of Infection, Immunology and Inflammation, University of Glasgow, Glasgow, United Kingdom
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21
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Abstract
PURPOSES OF REVIEW Th9 cells are recognized as a novel subset of effector T helper cells that preferentially produce IL-9. Here, we provide a current update on the reports related to the function of Th9 cells in allergic inflammatory diseases. RECENT FINDINGS The effector Th9 cells differentiating from naïve T helper cells have recently been identified. Because of accumulating findings of Th9 cells in many inflammatory diseases, including allergic diseases, diverse functions of Th9 cells in regulating immune responses have been suggested. Related reports indicate multiple sources of IL-9 besides Th9 cells and their association with the pathogenesis of allergic rhinitis, asthma, atopic dermatitis, contact dermatitis, and food allergy. More recently, elements of the epigenetic landscape involving in the regulation of IL-9 by Th9 cells have been identified to be the potential target for allergic inflammation. This review provides the most recent information about Th9 cells and their contribution in airway allergic disease, skin, and food allergy.
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Affiliation(s)
- Pornpimon Angkasekwinai
- Department of Medical Technology, Faculty of Allied Health Sciences, Thammasat University, Pathumthani, 12120, Thailand.
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22
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Xiong Y, Cui X, Li W, Lv J, Du L, Mi W, Li H, Chen Z, Leng Q, Zhou H, He R. BLT1 signaling in epithelial cells mediates allergic sensitization via promotion of IL-33 production. Allergy 2019; 74:495-506. [PMID: 30390302 DOI: 10.1111/all.13656] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Revised: 10/11/2018] [Accepted: 10/22/2018] [Indexed: 01/09/2023]
Abstract
BACKGROUND Epithelial cells (ECs) play a crucial role in allergic sensitization to inhaled protease allergens by instructing type 2 innate lymphoid cells (ILC2) and dendritic cells (DCs) via release of pro-type 2 cytokines, particularly interleukin-33 (IL-33). Leukotriene B4 (LTB4) is a well-known leukocyte chemoattractant via engagement of its receptor 1 (BLT1). However, the role of LTB4-BLT1 axis in allergic sensitization via activation of ECs is still unknown. METHODS We evaluated the effect of LTB4-BLT1 axis on IL-33 expression and ILC2 activation in vivo and in vitro. Chimeric mice were established to evaluate the contribution of BLT1 expression in nonimmune cell to allergic sensitization. RESULTS Genetical or pharmacological interruption of LTB4-BLT1 axis during sensitization phase markedly reduced papain-induced IL-33 expression, decreased ILC2 activation and DC migration, thereby impairing the priming of allergic Th2 responses. Furthermore, papain inhalation induced a rapid release of LTB4 preceding IL-33, and intranasal administration of LTB4 to naïve WT mice significantly increased IL-33 expression and ILC2 activation in lung, which was absent in Il33-/- or Ltb4r1-/- mice. Furthermore, BLT1 was expressed in primary mouse ECs or normal human bronchial ECs (NHBE), and papain induced LTB4 release by NHBE, which in turn amplified IL-33 production dependent on Akt activation via BLT1. Consequently, bone marrow chimeric mice lacking BLT1 in radio-resistant structural cells failed to develop allergic lung inflammation to papain. CONCLUSION Our study reveals a functional role of LTB4-BLT1 axis in nonimmune cells, most likely lung ECs, in controlling allergic sensitization as an upstream regulator of IL-33.
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Affiliation(s)
- Yingluo Xiong
- Department of Immunology and Basic Research Institute for Aging and Medicine, School of Basic Medical Sciences Fudan University Shanghai China
| | - Xinyi Cui
- Department of Immunology and Basic Research Institute for Aging and Medicine, School of Basic Medical Sciences Fudan University Shanghai China
| | - Wenjing Li
- Department of Immunology and Basic Research Institute for Aging and Medicine, School of Basic Medical Sciences Fudan University Shanghai China
| | - Jiaoyan Lv
- Department of Immunology and Basic Research Institute for Aging and Medicine, School of Basic Medical Sciences Fudan University Shanghai China
| | - Lixia Du
- Department of Integrative Medicine and Neurobiology School of Basic Medical Sciences Fudan University Shanghai China
| | - Wenli Mi
- Department of Integrative Medicine and Neurobiology School of Basic Medical Sciences Fudan University Shanghai China
- State Key Laboratory of Medical Neurobiology Institutes of Brain Science Fudan University Shanghai China
| | - Huabin Li
- Department of Otolaryngology, Head and Neck Surgery Eye, Nose and Throat Hospital Fudan University Shanghai China
| | - Zhengrong Chen
- Department of Respiratory Diseases Children's Hospital of Soochow University Suzhou China
| | - Qibin Leng
- CAS Key Laboratory of Molecular Virology & Immunology Institute Pasteur of Shanghai Chinese Academy of Sciences Shanghai China
| | - Hong Zhou
- Department of Immunology Nanjing Medical University Nanjing China
| | - Rui He
- Department of Immunology and Basic Research Institute for Aging and Medicine, School of Basic Medical Sciences Fudan University Shanghai China
- State Key Laboratory of Medical Neurobiology Institutes of Brain Science Fudan University Shanghai China
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23
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Gurram RK, Zhu J. Orchestration between ILC2s and Th2 cells in shaping type 2 immune responses. Cell Mol Immunol 2019; 16:225-235. [PMID: 30792500 DOI: 10.1038/s41423-019-0210-8] [Citation(s) in RCA: 101] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 01/31/2019] [Indexed: 01/06/2023] Open
Abstract
The type 2 immune response is critical for host defense against large parasites such as helminths. On the other hand, dysregulation of the type 2 immune response may cause immunopathological conditions, including asthma, atopic dermatitis, rhinitis, and anaphylaxis. Thus, a balanced type 2 immune response must be achieved to mount effective protection against invading pathogens while avoiding immunopathology. The classical model of type 2 immunity mainly involves the differentiation of type 2 T helper (Th2) cells and the production of distinct type 2 cytokines, including interleukin-4 (IL-4), IL-5, and IL-13. Group 2 innate lymphoid cells (ILC2s) were recently recognized as another important source of type 2 cytokines. Although eosinophils, mast cells, and basophils can also express type 2 cytokines and participate in type 2 immune responses to various degrees, the production of type 2 cytokines by the lymphoid lineages, Th2 cells, and ILC2s in particular is the central event during the type 2 immune response. In this review, we discuss recent advances in our understanding of how ILC2s and Th2 cells orchestrate type 2 immune responses through direct and indirect interactions.
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Affiliation(s)
- Rama Krishna Gurram
- Molecular and Cellular Immunoregulation Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, 20892, USA.
| | - Jinfang Zhu
- Molecular and Cellular Immunoregulation Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, 20892, USA.
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24
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Warner K, Ohashi PS. ILC regulation of T cell responses in inflammatory diseases and cancer. Semin Immunol 2019; 41:101284. [DOI: 10.1016/j.smim.2019.101284] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 06/26/2019] [Accepted: 07/17/2019] [Indexed: 01/04/2023]
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25
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Ikeda M, Katoh S, Oka M. A recurrent case of eosinophilic pneumonia with high IL-25 levels. Allergol Int 2018; 67S:S38-S40. [PMID: 29779833 DOI: 10.1016/j.alit.2018.03.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 03/08/2018] [Accepted: 03/22/2018] [Indexed: 11/19/2022] Open
Affiliation(s)
- Masaki Ikeda
- Department of Respiratory Medicine, Kawasaki Medical School, Okayama, Japan.
| | - Shigeki Katoh
- Department of Respiratory Medicine, Kawasaki Medical School, Okayama, Japan
| | - Mikio Oka
- Department of Respiratory Medicine, Kawasaki Medical School, Okayama, Japan
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26
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Lei AH, Xiao Q, Liu GY, Shi K, Yang Q, Li X, Liu YF, Wang HK, Cai WP, Guan YJ, Gabrilovich DI, Zhou J. ICAM-1 controls development and function of ILC2. J Exp Med 2018; 215:2157-2174. [PMID: 30049704 PMCID: PMC6080904 DOI: 10.1084/jem.20172359] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 05/02/2018] [Accepted: 07/03/2018] [Indexed: 12/12/2022] Open
Abstract
ILC2s are key players in allergic airway inflammation. Lei et al. show that ICAM-1 controls ILC2 development and function through regulating ERK signaling pathway, suggesting targeting ICAM-1 as a potential strategy for ILC2-induced asthma. Group 2 innate lymphoid cells (ILC2s) are emerging as key players in the pathogenesis of allergic airway inflammation. The mechanisms regulating ILC2, however, are not fully understood. Here, we found that ICAM-1 is required for the development and function of ILC2. ICAM-1–deficient (ICAM-1−/−) mice displayed significantly lower levels of ILC2s in the bone marrow and peripheral tissues than wild-type controls. CLP transfer and in vitro culture assays revealed that the regulation of ILC2 by ICAM-1 is cell intrinsic. Furthermore, ILC2s from ICAM-1−/− mice were functionally impaired, as indicated by the diminished production of type-2 cytokines in response to IL-33 challenge. The reduction in lung ILC2s caused a clear remission of airway inflammation in ICAM-1−/− mice after administration of papain or Alternaria alternata. We further demonstrate that ILC2 defects caused by ICAM-1 deficiency are due to ERK signaling-dependent down-regulation of GATA3 protein. Collectively, these observations identify ICAM-1 as a novel regulator of ILC2.
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Affiliation(s)
- Ai-Hua Lei
- Joint Program in Immunology, Department of Internal Medicine, Affiliated Guangzhou Women and Children's Medical Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Qiang Xiao
- Joint Program in Immunology, Department of Internal Medicine, Affiliated Guangzhou Women and Children's Medical Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Gao-Yu Liu
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Kun Shi
- Department of Gynecology, Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Qiong Yang
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Xing Li
- Department of Medical Oncology and Guangdong Key Laboratory of Liver Disease, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yu-Feng Liu
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Hai-Kun Wang
- CAS Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China
| | | | | | - Dmitry I Gabrilovich
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,The Wistar Institute, Philadelphia, PA.,Key Laboratory of Tropical Disease Control, Chinese Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Jie Zhou
- Joint Program in Immunology, Department of Internal Medicine, Affiliated Guangzhou Women and Children's Medical Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China .,Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Tropical Disease Control, Chinese Ministry of Education, Sun Yat-sen University, Guangzhou, China
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27
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Foster PS, Maltby S, Rosenberg HF, Tay HL, Hogan SP, Collison AM, Yang M, Kaiko GE, Hansbro PM, Kumar RK, Mattes J. Modeling T H 2 responses and airway inflammation to understand fundamental mechanisms regulating the pathogenesis of asthma. Immunol Rev 2018; 278:20-40. [PMID: 28658543 DOI: 10.1111/imr.12549] [Citation(s) in RCA: 94] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 02/25/2017] [Indexed: 12/12/2022]
Abstract
In this review, we highlight experiments conducted in our laboratories that have elucidated functional roles for CD4+ T-helper type-2 lymphocytes (TH 2 cells), their associated cytokines, and eosinophils in the regulation of hallmark features of allergic asthma. Notably, we consider the complexity of type-2 responses and studies that have explored integrated signaling among classical TH 2 cytokines (IL-4, IL-5, and IL-13), which together with CCL11 (eotaxin-1) regulate critical aspects of eosinophil recruitment, allergic inflammation, and airway hyper-responsiveness (AHR). Among our most important findings, we have provided evidence that the initiation of TH 2 responses is regulated by airway epithelial cell-derived factors, including TRAIL and MID1, which promote TH 2 cell development via STAT6-dependent pathways. Further, we highlight studies demonstrating that microRNAs are key regulators of allergic inflammation and potential targets for anti-inflammatory therapy. On the background of TH 2 inflammation, we have demonstrated that innate immune cells (notably, airway macrophages) play essential roles in the generation of steroid-resistant inflammation and AHR secondary to allergen- and pathogen-induced exacerbations. Our work clearly indicates that understanding the diversity and spatiotemporal role of the inflammatory response and its interactions with resident airway cells is critical to advancing knowledge on asthma pathogenesis and the development of new therapeutic approaches.
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Affiliation(s)
- Paul S Foster
- Priority Research Centre for Healthy Lungs, Department of Microbiology and Immunology, School of Biomedical Sciences & Pharmacy, Faculty of Health and Hunter Medical Research Institute, The University of Newcastle, Callaghan, NSW, Australia
| | - Steven Maltby
- Priority Research Centre for Healthy Lungs, Department of Microbiology and Immunology, School of Biomedical Sciences & Pharmacy, Faculty of Health and Hunter Medical Research Institute, The University of Newcastle, Callaghan, NSW, Australia
| | - Helene F Rosenberg
- Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD, USA
| | - Hock L Tay
- Priority Research Centre for Healthy Lungs, Department of Microbiology and Immunology, School of Biomedical Sciences & Pharmacy, Faculty of Health and Hunter Medical Research Institute, The University of Newcastle, Callaghan, NSW, Australia
| | - Simon P Hogan
- Division of Allergy and Immunology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Adam M Collison
- Paediatric Respiratory and Sleep Medicine Unit, Priority Research Centre for Healthy Lungs and GrowUpWell, University of Newcastle and Hunter Medical Research Institute, John Hunter Children's Hospital, Newcastle, NSW, Australia
| | - Ming Yang
- Priority Research Centre for Healthy Lungs, Department of Microbiology and Immunology, School of Biomedical Sciences & Pharmacy, Faculty of Health and Hunter Medical Research Institute, The University of Newcastle, Callaghan, NSW, Australia
| | - Gerard E Kaiko
- Priority Research Centre for Healthy Lungs, Department of Microbiology and Immunology, School of Biomedical Sciences & Pharmacy, Faculty of Health and Hunter Medical Research Institute, The University of Newcastle, Callaghan, NSW, Australia
| | - Philip M Hansbro
- Priority Research Centre for Healthy Lungs, Department of Microbiology and Immunology, School of Biomedical Sciences & Pharmacy, Faculty of Health and Hunter Medical Research Institute, The University of Newcastle, Callaghan, NSW, Australia
| | - Rakesh K Kumar
- Pathology, UNSW Sydney, School of Medical Sciences, Sydney, NSW, Australia
| | - Joerg Mattes
- Paediatric Respiratory and Sleep Medicine Unit, Priority Research Centre for Healthy Lungs and GrowUpWell, University of Newcastle and Hunter Medical Research Institute, John Hunter Children's Hospital, Newcastle, NSW, Australia
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28
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Abstract
Histamine is a pro-inflammatory mediator with a prominent role in allergic diseases. Antagonists at the histamine receptor subtype 1 are central in anti-allergic therapies, with the exception of allergic asthma, where they are clinically without effect. The latest identified histamine receptor subtype 4, which is expressed mainly in hematopoietic cells, now provides a reasonable target for new therapeutic strategies inhibiting histamine function. The pathophysiology of allergy, esp. allergic asthma, and in its context the effects of antagonists at the histamine receptor subtype 4 in preclinical and clinical settings are discussed in this chapter.
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29
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Chen R, Smith SG, Salter B, El-Gammal A, Oliveria JP, Obminski C, Watson R, O'Byrne PM, Gauvreau GM, Sehmi R. Allergen-induced Increases in Sputum Levels of Group 2 Innate Lymphoid Cells in Subjects with Asthma. Am J Respir Crit Care Med 2017; 196:700-712. [PMID: 28422515 DOI: 10.1164/rccm.201612-2427oc] [Citation(s) in RCA: 120] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
RATIONALE Group 2 innate lymphoid cells (ILC2), a major source of type 2 cytokines, initiate eosinophilic inflammatory responses in murine models of asthma. OBJECTIVES To investigate the role of ILC2 in allergen-induced airway eosinophilic responses in subjects with atopy and asthma. METHODS Using a diluent-controlled allergen challenge crossover study, where all subjects (n = 10) developed allergen-induced early and late responses, airway eosinophilia, and increased methacholine airway responsiveness, bone marrow, blood, and sputum samples were collected before and after inhalation challenge. MEASUREMENTS AND MAIN RESULTS ILC2 (lin-FcεRI-CD45+CD127+ST2+) and CD4+T lymphocytes were enumerated by flow cytometry, as well as intracellular IL-5 and IL-13 expression. Steroid sensitivity of ILC2 and CD4+ T cells was investigated in vitro. A significant increase in total, IL-5+, IL-13+, and CRTH2+ ILC2 was found in sputum, 24 hours after allergen, coincident with a significant decrease in blood ILC2. Total, IL-5+, and IL-13+, but not CRTH2+, CD4+ T cells significantly increased at 24 and 48 hours after allergen in sputum. In blood and bone marrow, only CD4+ cells demonstrated increased activation after allergen. Airway eosinophilia correlated with IL-5+ ILC2 at all time points and allergen-induced changes in IL-5+ CD4+ cells at 48 hours after allergen. Dexamethasone significantly attenuated IL-2- and IL-33-stimulated IL-5 and IL-13 production by both cell types. CONCLUSIONS Innate and adaptive immune cells are increased in the airways associated with allergic asthmatic responses. Total and type 2 cytokine-positive ILC2 are increased only within the airways, whereas CD4+ T lymphocytes demonstrated local and systemic increases. Steroid sensitivity of both cells may explain effectiveness of this therapy in those with mild asthma.
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Affiliation(s)
- Ruchong Chen
- 1 Asthma Research Group, Department of Medicine, Firestone Institute for Respiratory Health, St. Joseph's Healthcare and McMaster University, Hamilton, Ontario, Canada; and.,2 State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Steven G Smith
- 1 Asthma Research Group, Department of Medicine, Firestone Institute for Respiratory Health, St. Joseph's Healthcare and McMaster University, Hamilton, Ontario, Canada; and
| | - Brittany Salter
- 1 Asthma Research Group, Department of Medicine, Firestone Institute for Respiratory Health, St. Joseph's Healthcare and McMaster University, Hamilton, Ontario, Canada; and
| | - Amani El-Gammal
- 1 Asthma Research Group, Department of Medicine, Firestone Institute for Respiratory Health, St. Joseph's Healthcare and McMaster University, Hamilton, Ontario, Canada; and
| | - John Paul Oliveria
- 1 Asthma Research Group, Department of Medicine, Firestone Institute for Respiratory Health, St. Joseph's Healthcare and McMaster University, Hamilton, Ontario, Canada; and
| | - Caitlin Obminski
- 1 Asthma Research Group, Department of Medicine, Firestone Institute for Respiratory Health, St. Joseph's Healthcare and McMaster University, Hamilton, Ontario, Canada; and
| | - Rick Watson
- 1 Asthma Research Group, Department of Medicine, Firestone Institute for Respiratory Health, St. Joseph's Healthcare and McMaster University, Hamilton, Ontario, Canada; and
| | - Paul M O'Byrne
- 1 Asthma Research Group, Department of Medicine, Firestone Institute for Respiratory Health, St. Joseph's Healthcare and McMaster University, Hamilton, Ontario, Canada; and
| | - Gail M Gauvreau
- 1 Asthma Research Group, Department of Medicine, Firestone Institute for Respiratory Health, St. Joseph's Healthcare and McMaster University, Hamilton, Ontario, Canada; and
| | - Roma Sehmi
- 1 Asthma Research Group, Department of Medicine, Firestone Institute for Respiratory Health, St. Joseph's Healthcare and McMaster University, Hamilton, Ontario, Canada; and
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30
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Angkasekwinai P, Sodthawon W, Jeerawattanawart S, Hansakon A, Pattanapanyasat K, Wang YH. ILC2s activated by IL-25 promote antigen-specific Th2 and Th9 functions that contribute to the control of Trichinella spiralis infection. PLoS One 2017; 12:e0184684. [PMID: 28898280 PMCID: PMC5595335 DOI: 10.1371/journal.pone.0184684] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 08/29/2017] [Indexed: 01/21/2023] Open
Abstract
IL-25, an IL-17 family cytokine, derived from epithelial cells was shown to regulate Th2- and Th9-type immune responses. We previously reported that IL-25 was important in promoting efficient protective immunity against T. spiralis infection; however, the cellular targets of IL-25 to elicit type-2 immunity during infection have not yet been addressed. Here, we investigated IL-25-responding cells and their involvement in mediating type-2 immune response during T. spiralis infection. ILC2 and CD4+ Th2 cells residing in the gastrointestinal tract of T. spiralis infected mice were found to express high levels of surface interleukin-17 receptor B (IL-17RB), a component of the IL-25 receptor. Following T. spiralis infection, activated ILC2s upregulated surface MHCII expression and enhanced capacity of effector T helper cell in producing antigen-specific Th2 and Th9 cytokines through MHCII-dependent interactions. Reciprocally, lack of CD4+ T helper cells impaired ILC2 function to produce type 2-associated cytokines in responding to IL-25 during T. spiralis infection. Furthermore, mice deficient in IL-17RB showed markedly reduced ILC2 numbers and antigen-specific Th2 and Th9 cytokine production during T. spiralis infection. The Il17rb-/- mice failed to mount effective antigen specific Th2 and Th9 functions resulting in diminished goblet cell and mast cell responses, leading to delayed worm expulsion in the intestines and muscles. Thus, our data indicated that ILC2s and CD4+ Th2 cells are the predominant cellular targets of IL-25 following T. spiralis infection and their collaborative interactions may play a key role in mounting effective antigen-specific Th2 and Th9 cytokine responses against T. spiralis infection.
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Affiliation(s)
- Pornpimon Angkasekwinai
- Department of Medical Technology, Faculty of Allied Health Sciences, Thammasat University, Pathumthani Thailand.,Graduate Program in Biomedical Sciences, Faculty of Allied Health Sciences, Thammasat University, Pathumthani Thailand
| | - Wichuda Sodthawon
- Department of Medical Technology, Faculty of Allied Health Sciences, Thammasat University, Pathumthani Thailand
| | - Siranart Jeerawattanawart
- Department of Medical Technology, Faculty of Allied Health Sciences, Thammasat University, Pathumthani Thailand.,Graduate Program in Biomedical Sciences, Faculty of Allied Health Sciences, Thammasat University, Pathumthani Thailand
| | - Adithap Hansakon
- Department of Medical Technology, Faculty of Allied Health Sciences, Thammasat University, Pathumthani Thailand.,Graduate Program in Biomedical Sciences, Faculty of Allied Health Sciences, Thammasat University, Pathumthani Thailand
| | - Kovit Pattanapanyasat
- Center of Excellence for Flow Cytometry, Office for Research and Development, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Yui-Hsi Wang
- Division of Allergy and Immunology, University of Cincinnati, Cincinnati Children's Hospital Medical Center, Cincinnati, OH United States of America
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31
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Katoh S, Ikeda M, Matsumoto N, Shimizu H, Abe M, Ohue Y, Mouri K, Kobashi Y, Nakazato M, Oka M. Possible Role of IL-25 in Eosinophilic Lung Inflammation in Patients with Chronic Eosinophilic Pneumonia. Lung 2017; 195:707-712. [DOI: 10.1007/s00408-017-0048-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 08/28/2017] [Indexed: 12/21/2022]
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32
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Morikawa T, Fukuoka A, Matsushita K, Yasuda K, Iwasaki N, Akasaki S, Fujieda S, Yoshimoto T. Activation of group 2 innate lymphoid cells exacerbates and confers corticosteroid resistance to mouse nasal type 2 inflammation. Int Immunol 2017; 29:221-233. [DOI: 10.1093/intimm/dxx030] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 05/21/2017] [Indexed: 12/13/2022] Open
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33
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Tanaka H, Yamashita H, Inagaki N. Epithelial barrier function and innate immunity - their involvement in the pathophysiology of allergy and the therapeutic targets. Nihon Yakurigaku Zasshi 2017; 149:235-239. [PMID: 28484107 DOI: 10.1254/fpj.149.235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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34
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Cheng H, Jin C, Wu J, Zhu S, Liu YJ, Chen J. Guards at the gate: physiological and pathological roles of tissue-resident innate lymphoid cells in the lung. Protein Cell 2017; 8:878-895. [PMID: 28271447 PMCID: PMC5712288 DOI: 10.1007/s13238-017-0379-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 02/02/2017] [Indexed: 01/03/2023] Open
Abstract
The lung is an important open organ and the primary site of respiration. Many life-threatening diseases develop in the lung, e.g., pneumonia, asthma, chronic obstructive pulmonary diseases (COPDs), pulmonary fibrosis, and lung cancer. In the lung, innate immunity serves as the frontline in both anti-irritant response and anti-tumor defense and is also critical for mucosal homeostasis; thus, it plays an important role in containing these pulmonary diseases. Innate lymphoid cells (ILCs), characterized by their strict tissue residence and distinct function in the mucosa, are attracting increased attention in innate immunity. Upon sensing the danger signals from damaged epithelium, ILCs activate, proliferate, and release numerous cytokines with specific local functions; they also participate in mucosal immune-surveillance, immune-regulation, and homeostasis. However, when their functions become uncontrolled, ILCs can enhance pathological states and induce diseases. In this review, we discuss the physiological and pathological functions of ILC subsets 1 to 3 in the lung, and how the pathogenic environment affects the function and plasticity of ILCs.
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Affiliation(s)
- Hang Cheng
- Institute of Translational Medicine, The First Hospital, Jilin University, Changchun, 130061, China.,Department of Pediatrics, The First Hospital, Jilin University, Changchun, 130021, China
| | - Chengyan Jin
- Department of Thoracic Surgery, The Second Hospital, Jilin University, Changchun, 130041, China
| | - Jing Wu
- Institute of Translational Medicine, The First Hospital, Jilin University, Changchun, 130061, China
| | - Shan Zhu
- Institute of Translational Medicine, The First Hospital, Jilin University, Changchun, 130061, China
| | - Yong-Jun Liu
- Institute of Translational Medicine, The First Hospital, Jilin University, Changchun, 130061, China. .,Sanofi Research and Development, Cambridge, MA, 02139, USA.
| | - Jingtao Chen
- Institute of Translational Medicine, The First Hospital, Jilin University, Changchun, 130061, China.
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35
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Interleukin-33 drives hepatic fibrosis through activation of hepatic stellate cells. Cell Mol Immunol 2017; 15:388-398. [PMID: 28194023 DOI: 10.1038/cmi.2016.63] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 10/14/2016] [Accepted: 10/15/2016] [Indexed: 02/07/2023] Open
Abstract
Liver fibrosis is a consequence of chronic liver disease, causing morbidity and mortality. Interleukin-33 (IL-33) is a critical mediator of inflammation, which may be involved in the development of liver fibrosis. Here, we investigated the role of IL-33 in human patients and experimental bile-duct ligation (BDL)-induced fibrosis in mice. We report increased hepatic IL-33 expression in the murine BDL model of fibrosis and in surgical samples obtained from patients with liver fibrosis. Liver injury, inflammatory cell infiltration and fibrosis were reduced in the absence of the IL-33/ST2 receptor, and the activation of hepatic stellate cells (HSCs) was decreased in ST2-deficient mice. Recombinant IL-33 activated HSCs isolated from C57BL/6 mice, leading to the expression of IL-6, TGF-β, α-SMA and collagen, which was abrogated in the absence of ST2 or by pharmacological inhibition of MAPK signaling. Finally, administration of recombinant IL-33 significantly increased hepatic inflammation in sham-operated BL6 mice but did not enhance BDL-induced hepatic inflammation and fibrosis. In conclusion, BDL-induced liver inflammation and fibrosis are dependent on ST2 signaling in HSCs, and therefore, the IL-33/ST2 pathway may be a potential therapeutic target in human patients with chronic hepatitis and liver fibrosis.
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36
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Simons B, Ferrini ME, Carvalho S, Bassett DJP, Jaffar Z, Roberts K. PGI2 Controls Pulmonary NK Cells That Prevent Airway Sensitization to House Dust Mite Allergen. THE JOURNAL OF IMMUNOLOGY 2016; 198:461-471. [PMID: 27895167 DOI: 10.4049/jimmunol.1600275] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 10/31/2016] [Indexed: 12/16/2022]
Abstract
In allergic asthma, inhalation of airborne allergens such as the house dust mite (HDM) effectively activates both innate and adaptive immunity in the lung mucosa. To determine the role of the eicosanoid PGI2 and its receptor IP during allergic airway sensitization, HDM responses in mice lacking a functional IP receptor (i.e., PGI2 IP receptor-deficient [IP-/-]) were compared with wild type (WT) mice. Surprisingly, IP-/- mice had increased numbers of pulmonary CD3-NK1.1+Ly49b+ NK cells producing IFN-γ that was inversely associated with the number of type 2 innate lymphoid cells (ILC2s) expressing IL-33Rα and IL-13 compared with WT animals. This phenomenon was associated with elevated CX3CL1 levels in the airways of IP-/- mice and treatment with a neutralizing Ab to CX3CL1 reduced IFN-γ production by the lung NK cells. Remarkably, IP-/- mice were less responsive to HDM challenge than WT counterparts because intranasal instillation of the allergen induced markedly reduced levels of airway eosinophils, CD4+ lymphocyte infiltration, and mucus production, as well as depressed levels of CCL2 chemokine and Th2 cytokines. NK cells were responsible for such attenuated responses because depletion of NK1.1+ cells in IP-/- mice restored both the HDM-induced lung inflammation and ILC2 numbers, whereas transfer of CD3-NK1.1+ NK cells into the airways of WT hosts suppressed the inflammatory response. Collectively, these data demonstrate a hitherto unknown role for PGI2 in regulating the number and properties of NK cells resident in lung tissue and reveal a role for NK cells in limiting lung tissue ILC2s and preventing allergic inflammatory responses to inhaled HDM allergen.
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Affiliation(s)
- Bryan Simons
- Center for Environmental Health Sciences, Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT 59812; and
| | - Maria E Ferrini
- Center for Environmental Health Sciences, Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT 59812; and
| | - Sophia Carvalho
- Center for Environmental Health Sciences, Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT 59812; and
| | - David J P Bassett
- Department of Family Medicine and Public Health Sciences, School of Medicine, Wayne State University, Detroit, MI 48201
| | - Zeina Jaffar
- Center for Environmental Health Sciences, Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT 59812; and
| | - Kevan Roberts
- Center for Environmental Health Sciences, Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT 59812; and
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37
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Abstract
Immunoglobulin E (IgE)-mediated food allergy is an adverse reaction to foods and is driven by uncontrolled type-2 immune responses. Current knowledge cannot explain why only some individuals among those with food allergy are prone to develop life-threatening anaphylaxis. It is increasingly evident that the immunologic mechanisms involved in developing IgE-mediated food allergy are far more complex than allergic sensitization. Clinical observations suggest that patients who develop severe allergic reactions to food are often sensitized through the skin in early infancy. Environmental insults trigger epidermal thymic stromal lymphopoietin and interleukin-33 (IL-33) production, which endows dendritic cells with the ability to induce CD4
+TH2 cell-mediated allergic inflammation. Intestinal IL-25 propagates the allergic immune response by enhancing collaborative interactions between resident type-2 innate lymphoid cells and CD4
+TH2 cells expanded by ingested antigens in the gastrointestinal tract. IL-4 signaling provided by CD4
+TH2 cells induces emigrated mast cell progenitors to become multi-functional IL-9-producing mucosal mast cells, which then expand greatly after repeated food ingestions. Inflammatory cytokine IL-33 promotes the function and maturation of IL-9-producing mucosal mast cells, which amplify intestinal mastocytosis, resulting in increased clinical reactivity to ingested food allergens. These findings provide the plausible view that the combinatorial signals from atopic status, dietary allergen ingestions, and inflammatory cues may govern the perpetuation of allergic reactions from the skin to the gut and promote susceptibility to life-threatening anaphylaxis. Future in-depth studies of the molecular and cellular factors composing these stepwise pathways may facilitate the discovery of biomarkers and therapeutic targets for diagnosing, preventing, and treating food allergy.
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Affiliation(s)
- Yui-Hsi Wang
- Division of Allergy and Immunology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45299-3026, USA
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38
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Van Dyken SJ, Nussbaum JC, Lee J, Molofsky AB, Liang HE, Pollack JL, Gate RE, Haliburton GE, Ye CJ, Marson A, Erle DJ, Locksley RM. A tissue checkpoint regulates type 2 immunity. Nat Immunol 2016; 17:1381-1387. [PMID: 27749840 PMCID: PMC5275767 DOI: 10.1038/ni.3582] [Citation(s) in RCA: 169] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 08/25/2016] [Indexed: 12/14/2022]
Abstract
Group 2 innate lymphoid cells (ILC2s) and CD4+ type 2 helper T cells (TH2 cells) are defined by their similar effector cytokines, which together mediate the features of allergic immunity. We found that tissue ILC2s and TH2 cells differentiated independently but shared overlapping effector function programs that were mediated by exposure to the tissue-derived cytokines interleukin 25 (IL-25), IL-33 and thymic stromal lymphopoietin (TSLP). Loss of these three tissue signals did not affect lymph node priming, but abrogated the terminal differentiation of effector TH2 cells and adaptive lung inflammation in a T cell-intrinsic manner. Our findings suggest a mechanism by which diverse perturbations can activate type 2 immunity and reveal a shared local-tissue-elicited checkpoint that can be exploited to control both innate and adaptive allergic inflammation.
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Affiliation(s)
- Steven J Van Dyken
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA
| | - Jesse C Nussbaum
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA
| | - Jinwoo Lee
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA
| | - Ari B Molofsky
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California, USA
| | - Hong-Erh Liang
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA
| | - Joshua L Pollack
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA.,Lung Biology Center, University of California, San Francisco, San Francisco, California, USA
| | - Rachel E Gate
- Department of Epidemiology and Biostatistics, Institute for Human Genetics, University of California, San Francisco, San Francisco, California, USA
| | - Genevieve E Haliburton
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA.,Diabetes Center, University of California, San Francisco, San Francisco, California, USA
| | - Chun J Ye
- Department of Epidemiology and Biostatistics, Institute for Human Genetics, University of California, San Francisco, San Francisco, California, USA
| | - Alexander Marson
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA.,Diabetes Center, University of California, San Francisco, San Francisco, California, USA.,Innovative Genomics Initiative (IGI), University of California, Berkeley, Berkeley, California, USA.,UCSF Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California, USA
| | - David J Erle
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA.,Lung Biology Center, University of California, San Francisco, San Francisco, California, USA
| | - Richard M Locksley
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA.,UCSF Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California, USA.,Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, California, USA
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39
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Nucleotide-binding oligomerization domain 1 acts in concert with the cholecystokinin receptor agonist, cerulein, to induce IL-33-dependent chronic pancreatitis. Mucosal Immunol 2016; 9:1234-49. [PMID: 26813347 DOI: 10.1038/mi.2015.144] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 12/05/2015] [Indexed: 02/04/2023]
Abstract
Nucleotide-binding oligomerization domain 1 (NOD1) fulfills important host-defense functions via its responses to a variety of gut pathogens. Recently, however, we showed that in acute pancreatitis caused by administration of cholecystokinin receptor (CCKR) agonist (cerulein) NOD1 also has a role in inflammation via its responses to gut commensal organisms. In the present study, we explored the long-term outcome of such NOD1 responsiveness in a new model of chronic pancreatitis induced by repeated administration of low doses of cerulein in combination with NOD1 ligand. We found that the development of chronic pancreatitis in this model requires intact NOD1 and type I IFN signaling and that such signaling mediates a macrophage-mediated inflammatory response that supports interleukin (IL)-33 production by acinar cells. The IL-33, in turn, has a necessary role in the induction of IL-13 and TGF-β1, factors causing the fibrotic reaction characteristic of chronic pancreatitis. Interestingly, the Th2 effects of IL-33 were attenuated by the concomitant type I IFN response since the inflammation was marked by clear increases in IFN-γ and TNF-α production but only marginal increases in IL-4 production. These studies establish chronic pancreatitis as an IL-33-dependent inflammation resulting from synergistic interactions between the NOD1 and CCKR signaling pathways.
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40
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The IL-33 receptor (ST2) regulates early IL-13 production in fungus-induced allergic airway inflammation. Mucosal Immunol 2016; 9:937-49. [PMID: 26555705 DOI: 10.1038/mi.2015.106] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Accepted: 09/22/2015] [Indexed: 02/04/2023]
Abstract
Allergic airway inflammation (AAI) in response to environmental antigens is an increasing medical problem, especially in the Western world. Type 2 interleukins (IL) are central in the pathological response but their importance and cellular source(s) often rely on the particular allergen. Here, we highlight the cellular sources and regulation of the prototypic type 2 cytokine, IL-13, during the establishment of AAI in a fungal infection model using Cryptococcus neoformans. IL-13 reporter mice revealed a rapid onset of IL-13 competence within innate lymphoid cells type 2 (ILC2) and IL-33R(+) T helper (Th) cells. ILC2 showed IL-33-dependent proliferation upon infection and significant IL-13 production. Th cells essentially required IL-33 to become either GATA3(+) or GATA3(+)/Foxp3(+) hybrids. GATA3(+) Th cells almost exclusively contributed to IL-13 production but hybrid GATA3(+)/Foxp3(+) Th cells did not. In addition, alveolar macrophages upregulated the IL-33R and subsequently acquired a phenotype of alternative activation (Ym1(+), FIZZ1(+), and arginase-1(+)) linked to type 2 immunity. Absence of adaptive immunity in rag2(-/-) mice resulted in attenuated AAI, revealing the need for Th2 cells for full AAI development. Taken together, in pulmonary cryptococcosis ILC2 and GATA3(+) Th2 cells produce early IL-13 largely IL-33R-dependent, thereby promoting goblet cell metaplasia, pulmonary eosinophilia, and alternative activation of alveolar macrophages.
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41
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Zeng WP, McFarland MM, Zhou B, Holtfreter S, Flesher S, Cheung A, Mallick A. Staphylococcal enterotoxin A-activated regulatory T cells promote allergen-specific T H2 response to intratracheal allergen inoculation. J Allergy Clin Immunol 2016; 139:508-518.e4. [PMID: 27394914 DOI: 10.1016/j.jaci.2016.04.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 04/04/2016] [Accepted: 04/12/2016] [Indexed: 01/13/2023]
Abstract
BACKGROUND TH2 responses are implicated in asthma pathobiology. Epidemiologic studies have found a positive association between asthma and exposure to staphylococcal enterotoxins. OBJECTIVE We used a mouse model of asthma to determine whether staphylococcal enterotoxins promote TH2 differentiation of allergen-specific CD4 conventional T (Tcon) cells and asthma by activating allergen-nonspecific regulatory T (Treg) cells to create a TH2-polarizing cytokine milieu. METHODS Ovalbumin (OVA)-specific, staphylococcal enterotoxin A (SEA)-nonreactive naive CD4 Tcon cells were cocultured with SEA-reactive allergen-nonspecific Treg or CD4 Tcon cells in the presence of OVA and SEA. The OVA-specific CD4 T cells were then analyzed for IL-13 and IFN-γ expression. SEA-activated Treg cells were analyzed for the expression of the TH2-polarizing cytokine IL-4 and the T-cell activation markers CD69 and CD62L. For asthma induction, mice were intratracheally sensitized with OVA or cat dander extract (CDE) alone or together with SEA and then challenged with OVA or CDE. Mice were also subject to transient Treg cell depletion before sensitization with OVA plus SEA. Asthma features and TH2 differentiation in these mice were analyzed. RESULTS SEA-activated Treg cells induced IL-13 but suppressed IFN-γ expression in OVA-specific CD4 Tcon cells. SEA-activated Treg cells expressed IL-4, upregulated CD69, and downregulated CD62L. Sensitization with OVA plus SEA but not OVA alone induced asthma, and SEA exacerbated asthma induced by CDE. Depletion of Treg cells abolished these effects of SEA and IL-13 expression in OVA-specific T cells. CONCLUSION SEA promoted TH2 responses of allergen-specific T cells and asthma pathogenesis by activating Treg cells.
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Affiliation(s)
- Wei-Ping Zeng
- Department of Biochemistry and Microbiology, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV; Department of Pediatrics, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV; Center for Cell Development and Differentiation, Department of Biology, College of Science, Marshall University, Huntington, WV.
| | - Margaret M McFarland
- Department of Biochemistry and Microbiology, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV
| | - Baohua Zhou
- HB Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, Ind
| | - Silva Holtfreter
- Institute of Immunology and Transfusion Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Susan Flesher
- Department of Pediatrics, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV
| | - Ambrose Cheung
- Department of Microbiology and Immunology, Geisel School of Medicine, Dartmouth University, Hanover, NH
| | - Avishek Mallick
- Department of Mathematics, College of Science, Marshall University, Huntington, WV
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42
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Noble A, Zhao J. Follicular helper T cells are responsible for IgE responses to Der p 1 following house dust mite sensitization in mice. Clin Exp Allergy 2016; 46:1075-82. [PMID: 27138589 DOI: 10.1111/cea.12750] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 02/18/2016] [Accepted: 04/28/2016] [Indexed: 12/19/2022]
Abstract
BACKGROUND Th2 cells have long been considered responsible for the switching of B cells to production of IgE during cognate interaction, primarily due to their expression of CD40L and secretion of IL-4. This concept has been challenged by the more recent definition of follicular helper T cells (Tfh) as the key T cell subset in B cell isotype switching, due to their physical location at the boundary of T cell:B cell areas in lymphoid follicles and ability to express IL-4 and CD40L. OBJECTIVE To determine whether Tfh cells are responsible for IgE responses to Der p 1 allergen after house dust mite (HDM)-induced allergic sensitization. METHODS Mice deficient in Tfh cells were sensitized to HDM and Der p 1-specific IgE measured by ELISA. RESULTS Mice with a mutation in T cell-expressed IL-6R were unable to expand Tfh populations after HDM sensitization, and their anti-Der p 1 IgE, IgG1 and total IgE responses were reduced by 80-90% compared with wild-type mice. These animals displayed unaltered lung Th2 and eosinophilic responses after intranasal HDM challenge and normal IL-4 production, but B cell infiltration of the airways was abrogated. CONCLUSIONS AND CLINICAL RELEVANCE Our data indicate that Tfh cells are largely responsible for switching B cells to IgE synthesis, most likely via an IgG1(+) intermediate. However, Th2 cells are the major source of IL-4 during HDM sensitization and this might contribute to IgE synthesis at a stage distal to Tfh-mediated isotype switching. The IL-6/follicular helper T cell pathway is a potential therapeutic target in allergic disease.
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Affiliation(s)
- A Noble
- MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, King's College London, London, UK
| | - J Zhao
- MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, King's College London, London, UK
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43
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Edukulla R, Rehn KL, Liu B, McAlees JW, Hershey GK, Wang YH, Lewkowich I, Lindsley AW. Intratracheal myriocin enhances allergen-induced Th2 inflammation and airway hyper-responsiveness. IMMUNITY INFLAMMATION AND DISEASE 2016; 4:248-62. [PMID: 27621809 PMCID: PMC4893390 DOI: 10.1002/iid3.110] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 04/02/2016] [Accepted: 04/15/2016] [Indexed: 12/18/2022]
Abstract
Introduction Ceramide is the central substrate of sphingolipid metabolism and plays a key role in cellular signal transduction pathways, regulating apoptosis, differentiation, and chemotaxis. Alterations in airway ceramide levels are observed in multiple pulmonary diseases and recent human genetic association studies have linked dysregulation of sphingolipid regulatory genes with asthma pathogenesis. Methods Utilizing myriocin, a potent inhibitor of sphingolipid synthesis, we evaluated the immune regulatory role of de novo ceramide generation in vitro and in vivo. Intratracheal myriocin was administered alone or during house dust mite sensitization (HDM) of BALB/C mice and airway hyper‐responsiveness (AHR) was evaluated by invasive plethysmography followed by bronchial lavage (BAL) cytology and cytokine quantification. Results Myriocin inhibits and HDM exposure activates de novo ceramide synthesis in bone marrow‐derived dendritic cells. Mice receiving intratracheal myriocin developed a mild airway neutrophilic infiltrate without inducing a significant increase in AHR. CXCL1 was elevated in the BAL fluid of myriocin‐treated mice while the neutrophilic chemotactic factors anaphylatoxin C5a, leukotriene B4, and IL‐17 were unaffected. HDM treatment combined with myriocin led to a dramatic enhancement of AHR (63% increase over HDM alone, p < 0.001) and increased granulocyte pulmonary infiltrates versus HDM or myriocin alone. Elevated Th2 T cell counts and Th2 cytokines/chemokines (IL5, IL13, CCL17) were observed in mice treated with combined HDM/myriocin compared to HDM alone. Myriocin‐treated pulmonary CD11c+ cells stimulated with HDM secreted significantly more CXCL1 than cells stimulated with HDM alone while HDM stimulated airway epithelial cells showed no change in CXCL1 secretion following myriocin treatment. Conclusions Intratracheal myriocin, likely acting via ceramide synthesis inhibition, enhances allergen‐induced airway inflammation, granulocyte and Th2 lymphocyte recruitment, and allergen‐induced AHR. Sphingolipid pathways may represent novel targets for possible future anti‐inflammatory asthma medications.
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Affiliation(s)
- Ramakrishna Edukulla
- Division of Allergy and Immunology Cincinnati Children's Hospital Medical Center Cincinnati Ohio USA
| | - Kira Lee Rehn
- Division of Allergy and Immunology Cincinnati Children's Hospital Medical Center Cincinnati Ohio USA
| | - Bo Liu
- Division of Allergy and Immunology Cincinnati Children's Hospital Medical Center Cincinnati Ohio USA
| | - Jaclyn W McAlees
- Division of Immunobiology Cincinnati Children's Hospital Medical Center Cincinnati Ohio USA
| | - Gurjit K Hershey
- Division of Asthma ResearchCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA; Department of PediatricsUniversity of CincinnatiCincinnatiOhioUSA
| | - Yui Hsi Wang
- Division of Allergy and Immunology Cincinnati Children's Hospital Medical Center Cincinnati Ohio USA
| | - Ian Lewkowich
- Division of Immunobiology Cincinnati Children's Hospital Medical Center Cincinnati Ohio USA
| | - Andrew W Lindsley
- Division of Allergy and ImmunologyCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA; Department of PediatricsUniversity of CincinnatiCincinnatiOhioUSA
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44
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Wen T, Rothenberg ME, Wang YH. Hematopoietic prostaglandin D synthase: Linking pathogenic effector CD4(+) T(H)2 cells to proeosinophilic inflammation in patients with gastrointestinal allergic disorders. J Allergy Clin Immunol 2016; 137:919-21. [PMID: 26947983 PMCID: PMC5037440 DOI: 10.1016/j.jaci.2015.11.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 11/20/2015] [Indexed: 10/22/2022]
Affiliation(s)
- Ting Wen
- Division of Allergy and Immunology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Marc E Rothenberg
- Division of Allergy and Immunology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Yui-Hsi Wang
- Division of Allergy and Immunology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.
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45
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Williams PB, Barnes CS, Portnoy JM. Innate and Adaptive Immune Response to Fungal Products and Allergens. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2016; 4:386-95. [PMID: 26755096 DOI: 10.1016/j.jaip.2015.11.016] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 10/05/2015] [Accepted: 11/02/2015] [Indexed: 02/06/2023]
Abstract
Exposure to fungi and their products is practically ubiquitous, yet most of this is of little consequence to most healthy individuals. This is because there are a number of elaborate mechanisms to deal with these exposures. Most of these mechanisms are designed to recognize and neutralize such exposures. However, in understanding these mechanisms it has become clear that many of them overlap with our ability to respond to disruptions in tissue function caused by trauma or deterioration. These responses involve the innate and adaptive immune systems usually through the activation of nuclear factor kappa B and the production of cytokines that are considered inflammatory accompanied by other factors that can moderate these reactivities. Depending on different genetic backgrounds and the extent of activation of these mechanisms, various pathologies with resulting symptoms can ensue. Complicating this is the fact that these mechanisms can bias toward type 2 innate and adaptive immune responses. Thus, to understand what we refer to as allergens from fungal sources, we must first understand how they influence these innate mechanisms. In doing so it has become clear that many of the proteins that are described as fungal allergens are essentially homologues of our own proteins that signal or cause tissue disruptions.
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Affiliation(s)
- P Brock Williams
- Division of Allergy/Immunology, Children's Mercy Hospital, Kansas City, Mo
| | - Charles S Barnes
- Division of Allergy/Immunology, Children's Mercy Hospital, Kansas City, Mo
| | - Jay M Portnoy
- Division of Allergy/Immunology, Children's Mercy Hospital, Kansas City, Mo.
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46
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Coquet JM, Schuijs MJ, Smyth MJ, Deswarte K, Beyaert R, Braun H, Boon L, Karlsson Hedestam GB, Nutt SL, Hammad H, Lambrecht BN. Interleukin-21-Producing CD4(+) T Cells Promote Type 2 Immunity to House Dust Mites. Immunity 2015; 43:318-30. [PMID: 26287681 DOI: 10.1016/j.immuni.2015.07.015] [Citation(s) in RCA: 124] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Revised: 05/18/2015] [Accepted: 06/05/2015] [Indexed: 01/06/2023]
Abstract
Asthma is a T helper 2 (Th2)-cell-mediated disease; however, recent findings implicate Th17 and innate lymphoid cells also in regulating airway inflammation. Herein, we have demonstrated profound interleukin-21 (IL-21) production after house dust mite (HDM)-driven asthma by using T cell receptor (TCR) transgenic mice reactive to Dermatophagoides pteronyssinus 1 and an IL-21GFP reporter mouse. IL-21-producing cells in the mediastinal lymph node (mLN) bore characteristics of T follicular helper (Tfh) cells, whereas IL-21(+) cells in the lung did not express CXCR5 (a chemokine receptor expressed by Tfh cells) and were distinct from effector Th2 or Th17 cells. Il21r(-/-) mice developed reduced type 2 responses and the IL-21 receptor (IL-21R) enhanced Th2 cell function in a cell-intrinsic manner. Finally, administration of recombinant IL-21 and IL-25 synergistically promoted airway eosinophilia primarily via effects on CD4(+) lymphocytes. This highlights an important Th2-cell-amplifying function of IL-21-producing CD4(+) T cells in allergic airway inflammation.
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Affiliation(s)
- Jonathan M Coquet
- VIB Inflammation Research Center (IRC), Gent University, Zwijnaarde 9052B, Belgium; Department of Microbiology, Tumor and Cell Biology (MTC), Karolinska Institute, Stockholm 171 77, Sweden.
| | - Martijn J Schuijs
- VIB Inflammation Research Center (IRC), Gent University, Zwijnaarde 9052B, Belgium
| | - Mark J Smyth
- Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston, QLD 4006, Australia; School of Medicine, University of Queensland, Herston, QLD 4006, Australia
| | - Kim Deswarte
- VIB Inflammation Research Center (IRC), Gent University, Zwijnaarde 9052B, Belgium
| | - Rudi Beyaert
- VIB Inflammation Research Center (IRC), Gent University, Zwijnaarde 9052B, Belgium; Department of Biomedical Molecular Biology, Gent University, Gent 9000, Belgium
| | - Harald Braun
- VIB Inflammation Research Center (IRC), Gent University, Zwijnaarde 9052B, Belgium; Department of Biomedical Molecular Biology, Gent University, Gent 9000, Belgium
| | - Louis Boon
- Bioceros, Utrecht 3584CM, the Netherlands
| | | | - Steven L Nutt
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3010, Australia; The Department of Medical Biology, University of Melbourne, Parkville, VIC 3010, Australia
| | - Hamida Hammad
- VIB Inflammation Research Center (IRC), Gent University, Zwijnaarde 9052B, Belgium; Department of Respiratory Medicine, Gent University Hospital, Gent 9000, Belgium
| | - Bart N Lambrecht
- VIB Inflammation Research Center (IRC), Gent University, Zwijnaarde 9052B, Belgium; Department of Respiratory Medicine, Gent University Hospital, Gent 9000, Belgium; Department of Pulmonary Medicine, ErasmusMC, Rotterdam 3015CD, the Netherlands
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47
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Human Ascariasis Increases the Allergic Response and Allergic Symptoms. CURRENT TROPICAL MEDICINE REPORTS 2015. [DOI: 10.1007/s40475-015-0058-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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48
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Halim TYF. Group 2 innate lymphoid cells in disease. Int Immunol 2015; 28:13-22. [PMID: 26306498 DOI: 10.1093/intimm/dxv050] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 08/18/2015] [Indexed: 12/11/2022] Open
Abstract
Group 2 innate lymphoid cells (ILC2) are now recognized as an important innate source of type-2 effector cytokines. Although initially associated with mucosal tissues, it is clear that ILC2 are present in diverse anatomical locations. The function of ILC2 at these sites is equally varied, and although ILC2 represent a relatively minor population, they are fundamentally important regulators of innate and adaptive immune processes. As such, there is much interest to understand the role of ILC2 in diseases with a type-2 inflammatory component. This review explores the known roles of ILC2 in disease, and the diseases that show associations or other strong evidence for the involvement of ILC2.
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Affiliation(s)
- Timotheus Y F Halim
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK
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49
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von Burg N, Turchinovich G, Finke D. Maintenance of Immune Homeostasis through ILC/T Cell Interactions. Front Immunol 2015; 6:416. [PMID: 26322047 PMCID: PMC4534831 DOI: 10.3389/fimmu.2015.00416] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 07/29/2015] [Indexed: 12/19/2022] Open
Abstract
Innate lymphoid cells (ILCs) have emerged as a new family of immune cells with crucial functions in innate and adaptive immunity. ILC subsets mirror the cytokine and transcriptional profile of CD4+ T helper (TH) cell subsets. Hence, group 1 (ILC1), group 2 (ILC2), and group 3 (ILC3) ILCs can be distinguished by the production of TH1, TH2, and TH17-type cytokines, respectively. Cytokine release by ILCs not only shapes early innate immunity but can also orchestrate TH immune responses to microbial or allergen exposure. Recent studies have identified an unexpected effector function of ILCs as antigen presenting cells. Both ILC2s and ILC3s are able to process and present foreign antigens (Ags) via major histocompatibility complex class II, and to induce cognate CD4+ T cell responses. In addition, Ag-stimulated T cells promote ILC activation and effector functions indicating a reciprocal interaction between the adaptive and innate immune system. A fundamental puzzle in ILC function is how ILC/T cell interactions promote host protection and prevent autoimmune diseases. Furthermore, the way in which microenvironmental and inflammatory signals determine the outcome of ILC/T cell immune responses in various tissues is not yet understood. This review focuses on recent advances in understanding the mechanisms that coordinate the collaboration between ILCs and T cells under homeostatic and inflammatory conditions. We also discuss the potential roles of T cells and other immune cells to regulate ILC functions and to maintain homeostasis in mucosal tissues.
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Affiliation(s)
- Nicole von Burg
- Department of Biomedicine, University of Basel , Basel , Switzerland ; University of Basel Children's Hospital , Basel , Switzerland
| | - Gleb Turchinovich
- Department of Biomedicine, University of Basel , Basel , Switzerland ; University of Basel Children's Hospital , Basel , Switzerland
| | - Daniela Finke
- Department of Biomedicine, University of Basel , Basel , Switzerland ; University of Basel Children's Hospital , Basel , Switzerland
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