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Bartlett NW, Feghali-Bostwick C, Gunst SJ. Call for Papers: "Targeting Airway Immunity in Lung Disease". Am J Physiol Lung Cell Mol Physiol 2023; 324:L48-L52. [PMID: 36472349 DOI: 10.1152/ajplung.00375.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- Nathan W Bartlett
- Hunter Medical Research Institute, University of Newcastle, Newcastle, New South Wales, Australia
| | - Carol Feghali-Bostwick
- Department of Medicine, Medical University of South Carolina, Charleston, South Carolina
| | - Susan J Gunst
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, Indiana
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2
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IL-25 blockade augments antiviral immunity during respiratory virus infection. Commun Biol 2022; 5:415. [PMID: 35508632 PMCID: PMC9068710 DOI: 10.1038/s42003-022-03367-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 04/13/2022] [Indexed: 12/12/2022] Open
Abstract
IL-25 is implicated in the pathogenesis of viral asthma exacerbations. However, the effect of IL-25 on antiviral immunity has yet to be elucidated. We observed abundant expression and colocalization of IL-25 and IL-25 receptor at the apical surface of uninfected airway epithelial cells and rhinovirus infection increased IL-25 expression. Analysis of immune transcriptome of rhinovirus-infected differentiated asthmatic bronchial epithelial cells (BECs) treated with an anti-IL-25 monoclonal antibody (LNR125) revealed a re-calibrated response defined by increased type I/III IFN and reduced expression of type-2 immune genes CCL26, IL1RL1 and IL-25 receptor. LNR125 treatment also increased type I/III IFN expression by coronavirus infected BECs. Exogenous IL-25 treatment increased viral load with suppressed innate immunity. In vivo LNR125 treatment reduced IL-25/type 2 cytokine expression and increased IFN-β expression and reduced lung viral load. We define a new immune-regulatory role for IL-25 that directly inhibits virus induced airway epithelial cell innate anti-viral immunity. IL-25 and its receptor are expressed in airway epithelial cells of healthy individuals and patients with asthma and antibody-mediated blockade of IL-25 enhances antiviral immunity and blocks virus-exacerbated asthma responses.
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Corrado A, Ramonell RP, Woodruff MC, Tipton C, Wise S, Levy J, DelGaudio J, Kuruvilla ME, Magliocca KR, Tomar D, Garimalla S, Scharer CD, Boss JM, Wu H, Gumber S, Fucile C, Gibson G, Rosenberg A, Sanz I, Lee FEH. Extrafollicular IgD+ B cells generate IgE antibody secreting cells in the nasal mucosa. Mucosal Immunol 2021; 14:1144-1159. [PMID: 34050324 PMCID: PMC8160425 DOI: 10.1038/s41385-021-00410-w] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 04/05/2021] [Accepted: 04/24/2021] [Indexed: 02/04/2023]
Abstract
Increased IgE is a typical feature of allergic rhinitis. Local class-switch recombination has been intimated but B cell precursors and mechanisms remain elusive. Here we describe the dynamics underlying the generation of IgE-antibody secreting cells (ASC) in human nasal polyps (NP), mucosal tissues rich in ASC without germinal centers (GC). Using VH next generation sequencing, we identified an extrafollicular (EF) mucosal IgD+ naïve-like intermediate B cell population with high connectivity to the mucosal IgE ASC. Mucosal IgD+ B cells, express germline epsilon transcripts and predominantly co-express IgM. However, a small but significant fraction co-express IgG or IgA instead which also show connectivity to ASC IgE. Phenotypically, NP IgD+ B cells display an activated profile and molecular evidence of BCR engagement. Transcriptionally, mucosal IgD+ B cells reveal an intermediate profile between naïve B cells and ASC. Single cell IgE ASC analysis demonstrates lower mutational frequencies relative to IgG, IgA, and IgD ASC consistent with IgE ASC derivation from mucosal IgD+ B cell with low mutational load. In conclusion, we describe a novel mechanism of GC-independent, extrafollicular IgE ASC formation at the nasal mucosa whereby activated IgD+ naïve B cells locally undergo direct and indirect (through IgG and IgA), IgE class switch.
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Affiliation(s)
- Alessia Corrado
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Department of Medicine, Emory University, Atlanta, GA, USA
| | - Richard P Ramonell
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Department of Medicine, Emory University, Atlanta, GA, USA
| | - Matthew C Woodruff
- Division of Rheumatology, Department of Medicine, Emory University, Atlanta, GA, USA
- Lowance Center for Human Immunology Emory University, Atlanta, GA, USA
| | - Christopher Tipton
- Division of Rheumatology, Department of Medicine, Emory University, Atlanta, GA, USA
- Lowance Center for Human Immunology Emory University, Atlanta, GA, USA
| | - Sarah Wise
- Department of Otolaryngology, Emory University, Atlanta, GA, USA
| | - Joshua Levy
- Department of Otolaryngology, Emory University, Atlanta, GA, USA
| | - John DelGaudio
- Department of Otolaryngology, Emory University, Atlanta, GA, USA
| | - Merin E Kuruvilla
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Department of Medicine, Emory University, Atlanta, GA, USA
| | - Kelly R Magliocca
- Department of Pathology and Laboratory Medicine, Emory University, Atlanta, GA, USA
| | - Deepak Tomar
- Division of Rheumatology, Department of Medicine, Emory University, Atlanta, GA, USA
- Lowance Center for Human Immunology Emory University, Atlanta, GA, USA
| | - Swetha Garimalla
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA
| | | | - Jeremy M Boss
- Department of Microbiology and Immunology, Emory University, Atlanta, GA, USA
| | - Hao Wu
- Department of Biostatistics and Bioinformatics, Emory University, Atlanta, GA, USA
| | - Sanjeev Gumber
- Yerkes National Primate Research Center, Emory University, Atlanta, GA, USA
| | - Chris Fucile
- Department of Microbiology and Immunology, Informatics Institute, University of Alabama, Birmingham, AL, USA
| | - Greg Gibson
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA
| | - Alexander Rosenberg
- Department of Microbiology and Immunology, Informatics Institute, University of Alabama, Birmingham, AL, USA
| | - Iñaki Sanz
- Division of Rheumatology, Department of Medicine, Emory University, Atlanta, GA, USA
- Lowance Center for Human Immunology Emory University, Atlanta, GA, USA
| | - F Eun-Hyung Lee
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Department of Medicine, Emory University, Atlanta, GA, USA.
- Lowance Center for Human Immunology Emory University, Atlanta, GA, USA.
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Chung YS, Jin HL, Jeong KW. Cell-specific expression of ENACα gene by FOXA1 in the glucocorticoid receptor pathway. Int J Immunopathol Pharmacol 2021; 34:2058738420946192. [PMID: 32838581 PMCID: PMC7450284 DOI: 10.1177/2058738420946192] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Introduction: The glucocorticoid receptor (GR) is one of the most widely studied
ligand-dependent nuclear receptors. The combination of transcriptional
regulatory factors required for the expression of individual genes targeted
by GR varies across cell types; however, the mechanisms underlying this cell
type–specific regulation of gene expression are not yet clear. Methods: Here, we investigated genes regulated by GR in two different cell lines, A549
and ARPE-19, and examined how gene expression varied according to the effect
of pioneer factors using RNA-seq and RT-qPCR. Results: Our RNA-seq results identified 19 and 63 genes regulated by GR that are
ARPE-19-specific and A549-specific, respectively, suggesting that GR induces
the expression of different sets of genes in a cell type–specific manner.
RT-qPCR confirmed that the epithelial sodium channel
(ENACα) gene is an ARPE-19 cell-specific GR target gene,
whereas the FK506 binding protein 5 (FKBP5) gene was A549
cell-specific. There was a significant decrease in ENACα
expression in FOXA1-deficient ARPE-19 cells, suggesting that FOXA1 might
function as a pioneer factor enabling the selective expression of
ENACα in ARPE-19 cells but not in A549 cells. Conclusion: These findings indicate that ENACα expression in ARPE-19
cells is regulated by FOXA1 and provide insights into the molecular
mechanisms of cell type–specific expression of GR-regulated genes.
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Affiliation(s)
- Young Sun Chung
- Gachon Institute of Pharmaceutical Sciences, College of Pharmacy, Gachon University, Incheon, Republic of Korea
| | - Hong Lan Jin
- College of Pharmacy, Yanbian University, Yanji, People's Republic of China
| | - Kwang Won Jeong
- Gachon Institute of Pharmaceutical Sciences, College of Pharmacy, Gachon University, Incheon, Republic of Korea
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Cusack RP, Whetstone CE, Xie Y, Ranjbar M, Gauvreau GM. Regulation of Eosinophilia in Asthma-New Therapeutic Approaches for Asthma Treatment. Cells 2021; 10:cells10040817. [PMID: 33917396 PMCID: PMC8067385 DOI: 10.3390/cells10040817] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/31/2021] [Accepted: 04/04/2021] [Indexed: 02/07/2023] Open
Abstract
Asthma is a complex and chronic inflammatory disease of the airways, characterized by variable and recurring symptoms, reversible airflow obstruction, bronchospasm, and airway eosinophilia. As the pathophysiology of asthma is becoming clearer, the identification of new valuable drug targets is emerging. IL-5 is one of these such targets because it is the major cytokine supporting eosinophilia and is responsible for terminal differentiation of human eosinophils, regulating eosinophil proliferation, differentiation, maturation, migration, and prevention of cellular apoptosis. Blockade of the IL-5 pathway has been shown to be efficacious for the treatment of eosinophilic asthma. However, several other inflammatory pathways have been shown to support eosinophilia, including IL-13, the alarmin cytokines TSLP and IL-33, and the IL-3/5/GM-CSF axis. These and other alternate pathways leading to airway eosinophilia will be described, and the efficacy of therapeutics that have been developed to block these pathways will be evaluated.
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Altered Frequency of NK Cells and Treg Cells by Astragalus Polysaccharide Combined with Budesonide in Asthma Model Mice. ADVANCES IN POLYMER TECHNOLOGY 2020. [DOI: 10.1155/2020/1763245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Objective. We investigated the efficacy of astragalus polysaccharide (APS) combined with budesonide and the effect on expressions of peripheral NK cells and Treg cells and the molecular mechanism in mice with bronchial asthma. Methods. In this study, we established a mouse model of asthma. Four groups of BaLB/C mice were developed; control group had no asthma induction, and the other three groups of mice were sensitized by OVA (Ovalbumin), OVA + budesonide, and OVA + APS + budesonide. Flow cytometry was used to determine the proportion of NK cells and Treg cells. Levels of cytokines IL-4 and IL-10 were detected using RT-PCR and ELISA. Results. Asthma mice treated with APS + budesonide showed alleviated airway resistance compared to model mice (P<0.05). The percentage of dendritic cells (DCs) was reduced (P<0.05), while anti-inflammatory NK cells and Treg cells significantly increased after APS + budesonide treatment (P<0.05). Further, APS + budesonide treatment resulted in improvements in IL-4 and IL-10 mRNA and protein levels (P<0.05). Conclusion. APS combined with budesonide medication may regulate expressions of DCs cells and related cytokines, reliving clinical symptom of bronchial asthma.
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