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Campbell E, Hesser LA, Berni Canani R, Carucci L, Paparo L, Patry RT, Nagler CR. A Lipopolysaccharide-Enriched Cow's Milk Allergy Microbiome Promotes a TLR4-Dependent Proinflammatory Intestinal Immune Response. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2024; 212:702-714. [PMID: 38169331 PMCID: PMC10872367 DOI: 10.4049/jimmunol.2300518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 12/12/2023] [Indexed: 01/05/2024]
Abstract
We have previously reported that the gut microbiota of healthy infants harbors allergy-protective bacteria taxa that are depleted in infants with cow's milk allergy (CMA). Few reports have investigated the role of the gut microbiota in promoting allergic responses. In this study we selected a CMA-associated microbiota with increased abundance of Gram-negative bacteria for analysis of its proinflammatory potential. LPS is the major component of the outer membrane of Gram-negative bacteria. Colonization of mice with a global or conditional mutation of the LPS receptor TLR4 with this CMA microbiota induced expression of serum amyloid A1 (Saa1) and other Th17-, B cell-, and Th2-associated genes in the ileal epithelium in a TLR4-dependent manner. In agreement with the gene expression data, mice colonized with the CMA microbiota have expanded populations of Th17 and regulatory T cells and elevated concentrations of fecal IgA. Importantly, we used both antibiotic-treated specific pathogen-free and germ-free rederived mice with a conditional mutation of TLR4 in the CD11c+ compartment to demonstrate that the induction of proinflammatory genes, fecal IgA, and Th17 cells is dependent on TLR4 signaling. Furthermore, metagenomic sequencing revealed that the CMA microbiota has an increased abundance of LPS biosynthesis genes. Taken together, our results show that a microbiota displaying a higher abundance of LPS genes is associated with TLR4-dependent proinflammatory gene expression and a mixed type 2/type 3 response in mice, which may be characteristic of a subset of infants with CMA.
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Affiliation(s)
- Evelyn Campbell
- Committee on Microbiology, The University of Chicago, Chicago, IL. U.S.A
| | - Lauren A. Hesser
- Department of Pathology, The University of Chicago, Chicago, IL. U.S.A
- Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL. U.S.A
| | - Roberto Berni Canani
- Department of Translational Medical Science and ImmunoNutrition Lab at CEINGE Advanced Biotechnologies Research Center and Task Force for Microbiome Studies, Section of Pediatrics, University of Naples Federico II, Naples, Italy
| | - Laura Carucci
- Department of Translational Medical Science and ImmunoNutrition Lab at CEINGE Advanced Biotechnologies Research Center and Task Force for Microbiome Studies, Section of Pediatrics, University of Naples Federico II, Naples, Italy
| | - Lorella Paparo
- Department of Translational Medical Science and ImmunoNutrition Lab at CEINGE Advanced Biotechnologies Research Center and Task Force for Microbiome Studies, Section of Pediatrics, University of Naples Federico II, Naples, Italy
| | - Robert T. Patry
- Department of Pathology, The University of Chicago, Chicago, IL. U.S.A
| | - Cathryn R. Nagler
- Department of Pathology, The University of Chicago, Chicago, IL. U.S.A
- Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL. U.S.A
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2
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Lameire S, Hammad H. Lung epithelial cells: Upstream targets in type 2-high asthma. Eur J Immunol 2023; 53:e2250106. [PMID: 36781404 DOI: 10.1002/eji.202250106] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 02/07/2023] [Accepted: 02/09/2023] [Indexed: 02/15/2023]
Abstract
Over the last years, technological advances in the field of asthma have led to the identification of two disease endotypes, namely, type 2-high and type 2-low asthma, characterized by different pathophysiologic mechanisms at a cellular and molecular level. Although specific immune cells are important contributors to each of the recognized asthma endotype, the lung epithelium is now regarded as a crucial player able to orchestrate responses to inhaled environmental triggers such as allergens and microbes. The impact of the epithelium goes beyond its physical barrier. It is nowadays considered as a part of the innate immune system that can actively respond to insults. Activated epithelial cells, by producing a specific set of cytokines, trigger innate and adaptive immune cells to cause pathology. Here, we review how the epithelium contributes to the development of Th2 sensitization to allergens and asthma with a "type 2-high" signature, in both murine models and human studies of this asthma endotype. We also discuss epithelial responses to respiratory viruses, such as rhinovirus, respiratory syncytial virus, and SARS-CoV-2, and how these triggers influence not only asthma development but also asthma exacerbation. Finally, we also summarize the results of promising clinical trials using biologicals targeting epithelial-derived cytokines in asthmatic patients.
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Affiliation(s)
- Sahine Lameire
- Laboratory of Mucosal Immunology and Immunoregulation, VIB Center for Inflammation Research, Ghent, Belgium
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
| | - Hamida Hammad
- Laboratory of Mucosal Immunology and Immunoregulation, VIB Center for Inflammation Research, Ghent, Belgium
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
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3
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Merk VM, Phan TS, Wiedmann A, Hardy RS, Lavery GG, Brunner T. Local glucocorticoid synthesis regulates house dust mite-induced airway hypersensitivity in mice. Front Immunol 2023; 14:1252874. [PMID: 37936704 PMCID: PMC10626452 DOI: 10.3389/fimmu.2023.1252874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 10/11/2023] [Indexed: 11/09/2023] Open
Abstract
Background Extra-adrenal glucocorticoid (GC) synthesis at epithelial barriers, such as skin and intestine, has been shown to be important in the local regulation of inflammation. However, the role of local GC synthesis in the lung is less well studied. Based on previous studies and the uncontentious efficacy of corticosteroid therapy in asthma patients, we here investigated the role of 11β-hydroxysteroid dehydrogenase 1 (11β-HSD1/Hsd11b1)-dependent local GC reactivation in the regulation of allergic airway inflammation. Methods Airway inflammation in Hsd11b1-deficient and C57BL/6 wild type mice was analyzed after injection of lipopolysaccharide (LPS) and anti-CD3 antibody, and in acute and chronic models of airway hypersensitivity induced by house dust mite (HDM) extract. The role of 11β-HSD1 in normal and inflammatory conditions was assessed by high dimensional flow cytometry, histological staining, RT-qPCR analysis, ex vivo tissue cultures, GC-bioassays and protein detection by ELISA and immunoblotting. Results Here we show that lung tissue from Hsd11b1-deficient mice synthesized significantly less GC ex vivo compared with wild type animals in response to immune cell stimulation. We further observed a drastically aggravated phenotype in Hsd11b1-deficient mice treated with HDM extract compared to wild type animals. Besides eosinophilic infiltration, Hsd11b1-deficient mice exhibited aggravated neutrophilic infiltration caused by a strong Th17-type immune response. Conclusion We propose an important role of 11β-HSD1 and local GC in regulating Th17-type rather than Th2-type immune responses in HDM-induced airway hypersensitivity in mice by potentially controlling Toll-like receptor 4 (TLR4) signaling and cytokine/chemokine secretion by airway epithelial cells.
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Affiliation(s)
- Verena M. Merk
- Department of Biology, University of Konstanz, Konstanz, Germany
| | - Truong San Phan
- Department of Biology, University of Konstanz, Konstanz, Germany
- Department of Systems Immunology, Weizmann Institute of Science, Rehovot, Israel
| | - Alice Wiedmann
- Department of Biology, University of Konstanz, Konstanz, Germany
| | - Rowan S. Hardy
- Institute of Clinical Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Gareth G. Lavery
- Department of Biosciences, Nottingham Trent University, Nottingham, United Kingdom
| | - Thomas Brunner
- Department of Biology, University of Konstanz, Konstanz, Germany
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Liang G, Zhou J, Jiang L, Wang W, Wu Q, Gao C, Liu W, Li S, Feng S, Song Z. Higher House Dust Mite-Specific IgE Levels among Chronic Spontaneous Urticaria Patients May Implicate Higher Basophil Reactivity. Int Arch Allergy Immunol 2023; 184:1126-1134. [PMID: 37604140 DOI: 10.1159/000531966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 07/05/2023] [Indexed: 08/23/2023] Open
Abstract
INTRODUCTION Allergen-specific IgE (sIgE) sensitization exists in a considerable fraction of chronic spontaneous urticaria (CSU) patients. Basophils have been implicated in the pathogenesis of CSU. This paper aimed to explore the relationship between allergic sensitization and basophil reactivity in CSU and the possible underlying mechanism. METHODS Basophil-enriched leukocytes were isolated from the peripheral blood of 76 CSU patients and 9 healthy controls. Basophil CD63 and FcεRIα (the alpha subunit of the high-affinity IgE receptor) expression in the blood samples with various house dust mite (HDM)-sIgE levels were determined by flow cytometry. Basophil reactivity and SHIP-1 (a molecule related to the IgE/FcεRI signaling pathway) expression were analyzed after stimulation with an HDM allergen or other stimuli. RESULTS HDM-sIgEstrong positive (≥3.5 kU/L) CSU patients had a significantly higher mean percentage of basophil CD63 and higher baseline levels of FcεRIα expressed by basophils than HDM-sIgEnormal (<0.35 kU/L) CSU patients and healthy controls; the same went for total serum IgE. After stimulation with Dermatophagoides pteronyssinus peptidase 1 (Derp1) alone or together with Derp1-sIgE, the stimulation index of CD63 and levels of FcεRIα expressed by basophils in HDM-sIgEstrong positive CSU patients were significantly higher than those in HDM-sIgEnormal CSU patients and healthy controls. Significantly more SHIP-1 mRNA expression in HDM-sIgEstrong positive CSU patients was induced after the combined stimulation in comparison to other subjects. CONCLUSION CSU patients with higher HDM-sIgE levels (≥3.5 kU/L) may have higher CD63 and FcεRIα expression on peripheral blood basophils. Peripheral blood basophils in these CSU patients are more responsive to HDM allergen stimulation. Higher HDM-sIgE levels among CSU patients may implicate higher basophil reactivity.
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Affiliation(s)
- Gaopeng Liang
- Department of Dermatology, Southwest Hospital, Army Medical University, Chongqing, China,
| | - Jie Zhou
- Department of Dermatology, Southwest Hospital, Army Medical University, Chongqing, China
| | - Lanlan Jiang
- Department of Dermatology, Southwest Hospital, Army Medical University, Chongqing, China
| | - Wenwen Wang
- Department of Dermatology, Southwest Hospital, Army Medical University, Chongqing, China
| | - Qijun Wu
- Department of Dermatology, Southwest Hospital, Army Medical University, Chongqing, China
| | - Cuie Gao
- Department of Dermatology, Southwest Hospital, Army Medical University, Chongqing, China
| | - Wenying Liu
- Department of Dermatology, Southwest Hospital, Army Medical University, Chongqing, China
| | - Shifei Li
- Department of Dermatology, Southwest Hospital, Army Medical University, Chongqing, China
| | - Shujing Feng
- Department of Dermatology, Southwest Hospital, Army Medical University, Chongqing, China
| | - Zhiqiang Song
- Department of Dermatology, Southwest Hospital, Army Medical University, Chongqing, China
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Busold S, Akkerdaas JH, Zijlstra-Willems EM, van der Graaf K, Tas SW, de Jong EC, van Ree R, Geijtenbeek TBH. Toll-like receptor 4 and Syk kinase shape dendritic cell-induced immune activation to major house dust mite allergens. Front Med (Lausanne) 2023; 10:1105538. [PMID: 37614946 PMCID: PMC10442820 DOI: 10.3389/fmed.2023.1105538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 07/20/2023] [Indexed: 08/25/2023] Open
Abstract
Background House dust mite (HDM) is a major cause of respiratory allergic diseases. Dendritic cells (DCs) play a central role in orchestrating adaptive allergic immune responses. However, it remains unclear how DCs become activated by HDM. Biochemical functions of the major HDM allergens Der p 1 (cysteine protease) and Der p 2 (MD2-mimick) have been implicated to contribute to DC activation. Methods We investigated the immune activating potential of HDM extract and its major allergens Der p 1 and Der p 2 using monocyte-derived DCs (moDCs). Maturation and activation markers were monitored by flow cytometry and cytokine production by ELISA. Allergen depletion and proteinase K digestion were used to investigate the involvement of proteins, and in particular of the major allergens. Inhibitors of spleen tyrosine kinase (Syk), Toll-like receptor 4 (TLR4) and of C-type lectin receptors (CLRs) were used to identify the involved receptors. The contribution of endotoxins in moDC activation was assessed by their removal from HDM extract. Results HDM extract induced DC maturation and cytokine responses in contrast to the natural purified major allergens Der p 1 and Der p 2. Proteinase K digestion and removal of Der p 1 or Der p 2 did not alter the immune stimulatory capacity of HDM extract. Antibodies against the CLRs Dectin-1, Dectin-2, and DC-SIGN did not affect cytokine responses. In contrast, Syk inhibition partially reduced IL-6, IL-12 and completely blocked IL-10. Blocking TLR4 signaling reduced the HDM-induced IL-10 and IL-12p70 induction, but not IL-6, while endotoxin removal potently abolished the induced cytokine response. Conclusion Our data strongly suggest that HDM-induced DC activation is neither dependent on Der p 1 nor Der p 2, but depend on Syk and TLR4 activation, which might suggest a crosstalk between Syk and TLR4 pathways. Our data highlight that endotoxins play a potent role in immune responses targeting HDM.
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Affiliation(s)
- Stefanie Busold
- Amsterdam University Medical Centers, location AMC, Department of Experimental Immunology, Amsterdam, Netherlands
- Amsterdam Institute for Infection and Immunity, Inflammatory Diseases, Amsterdam, Netherlands
| | - Jaap H. Akkerdaas
- Amsterdam University Medical Centers, location AMC, Department of Experimental Immunology, Amsterdam, Netherlands
- Amsterdam Institute for Infection and Immunity, Inflammatory Diseases, Amsterdam, Netherlands
| | - Esther M. Zijlstra-Willems
- Amsterdam University Medical Centers, location AMC, Department of Experimental Immunology, Amsterdam, Netherlands
- Amsterdam Institute for Infection and Immunity, Inflammatory Diseases, Amsterdam, Netherlands
| | | | - Sander W. Tas
- Amsterdam University Medical Centers, location AMC, Department of Experimental Immunology, Amsterdam, Netherlands
- Amsterdam Institute for Infection and Immunity, Inflammatory Diseases, Amsterdam, Netherlands
- Amsterdam Rheumatology and Immunology Center, Department of Rheumatology and Clinical Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Esther C. de Jong
- Amsterdam University Medical Centers, location AMC, Department of Experimental Immunology, Amsterdam, Netherlands
- Amsterdam Institute for Infection and Immunity, Inflammatory Diseases, Amsterdam, Netherlands
| | - Ronald van Ree
- Amsterdam University Medical Centers, location AMC, Department of Experimental Immunology, Amsterdam, Netherlands
- Amsterdam Institute for Infection and Immunity, Inflammatory Diseases, Amsterdam, Netherlands
- Amsterdam University Medical Centers, location AMC, Department of Otorhinolaryngology, Amsterdam, Netherlands
| | - Teunis B. H. Geijtenbeek
- Amsterdam University Medical Centers, location AMC, Department of Experimental Immunology, Amsterdam, Netherlands
- Amsterdam Institute for Infection and Immunity, Inflammatory Diseases, Amsterdam, Netherlands
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6
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Lyu M, Qin J, Huang S, Shao D, Huang G, Yang F, Gong X, Zhang S, Zhang Z, Wang J, Cui H. Tuo-Min-Ding-Chuan Decoction Alleviates Airway Inflammations in the Allergic Asthmatic Mice Model by Regulating TLR4-NLRP3 Pathway-Mediated Pyroptosis: A Network Pharmacology and Experimental Verification Study. Drug Des Devel Ther 2023; 17:1613-1630. [PMID: 37287697 PMCID: PMC10243359 DOI: 10.2147/dddt.s406483] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 05/04/2023] [Indexed: 06/09/2023] Open
Abstract
Background Tuo-Min-Ding-Chuan Decoction (TMDCD) is an effective traditional Chinese medicine (TCM) formula granule for allergic asthma (AA). Previous studies proved its effects on controlling airway inflammations, while the specific mechanism was not clear. Methods We conducted a network pharmacology study to explore the molecular mechanism of TMDCD against AA with the public databases of TCMSP. Then, HUB genes were screened with the STRING database. DAVID database performed GO annotation and KEGG functional enrichment analysis of HUB genes, and it was verified with molecular docking by Autodock. Then, we built a classic ovalbumin-induced allergic asthma mice model to explore the mechanism of anti-inflammation effects of TMDCD. Results In the network pharmacology study, we found out that the potential mechanism of TMDCD against AA might be related to NOD-like receptor (NLR) signaling pathway and Toll-like receptor (TLR) signaling pathway. In the experiment, TMDCD showed remarkable effects on alleviating airway inflammations, airway hyperresponsiveness (AHR), and airway remodeling in the asthmatic mice model. Further molecular biology and immunohistochemistry experiments suggested TMDCD could repress TLR4-NLRP3 pathway-mediated pyroptosis-related gene transcriptions to inhibit expressions of target proteins. Conclusion TMDCD could alleviate asthmatic mice model airway inflammations by regulating TLR4-NLRP3 pathway-mediated pyroptosis.
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Affiliation(s)
- Mingsheng Lyu
- Center of Respiratory Disease, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, People’s Republic of China
- Department of Respiratory, The Third Affiliated Hospital, Beijing University of Chinese Medicine, Beijing, People’s Republic of China
| | - Jingbo Qin
- Department of Geratology, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, People’s Republic of China
| | - Shuaiyang Huang
- Department of Respiratory, The Third Affiliated Hospital, Beijing University of Chinese Medicine, Beijing, People’s Republic of China
| | - Dongmei Shao
- Department of Infectious Disease, Shunyi Hospital, Beijing Hospital of Traditional Chinese Medicine, Beijing, People’s Republic of China
| | - Guirui Huang
- Department of Respiratory, The Third Affiliated Hospital, Beijing University of Chinese Medicine, Beijing, People’s Republic of China
| | - Fan Yang
- College of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, People’s Republic of China
- National Institute of Traditional Chinese Medicine (TCM) Constitution and Preventive Medicine, Beijing University of Chinese Medicine, Beijing, People’s Republic of China
| | - Xuefeng Gong
- Department of Traditional Chinese Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, People’s Republic of China
| | - Shiyu Zhang
- Department of Respiratory, The Third Affiliated Hospital, Beijing University of Chinese Medicine, Beijing, People’s Republic of China
| | - Zhijie Zhang
- Department of Respiratory, The Third Affiliated Hospital, Beijing University of Chinese Medicine, Beijing, People’s Republic of China
| | - Ji Wang
- National Institute of Traditional Chinese Medicine (TCM) Constitution and Preventive Medicine, Beijing University of Chinese Medicine, Beijing, People’s Republic of China
| | - Hongsheng Cui
- Department of Respiratory, The Third Affiliated Hospital, Beijing University of Chinese Medicine, Beijing, People’s Republic of China
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7
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Wang J, Zhou Y, Zhang H, Hu L, Liu J, Wang L, Wang T, Zhang H, Cong L, Wang Q. Pathogenesis of allergic diseases and implications for therapeutic interventions. Signal Transduct Target Ther 2023; 8:138. [PMID: 36964157 PMCID: PMC10039055 DOI: 10.1038/s41392-023-01344-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 01/20/2023] [Accepted: 02/03/2023] [Indexed: 03/26/2023] Open
Abstract
Allergic diseases such as allergic rhinitis (AR), allergic asthma (AAS), atopic dermatitis (AD), food allergy (FA), and eczema are systemic diseases caused by an impaired immune system. Accompanied by high recurrence rates, the steadily rising incidence rates of these diseases are attracting increasing attention. The pathogenesis of allergic diseases is complex and involves many factors, including maternal-fetal environment, living environment, genetics, epigenetics, and the body's immune status. The pathogenesis of allergic diseases exhibits a marked heterogeneity, with phenotype and endotype defining visible features and associated molecular mechanisms, respectively. With the rapid development of immunology, molecular biology, and biotechnology, many new biological drugs have been designed for the treatment of allergic diseases, including anti-immunoglobulin E (IgE), anti-interleukin (IL)-5, and anti-thymic stromal lymphopoietin (TSLP)/IL-4, to control symptoms. For doctors and scientists, it is becoming more and more important to understand the influencing factors, pathogenesis, and treatment progress of allergic diseases. This review aimed to assess the epidemiology, pathogenesis, and therapeutic interventions of allergic diseases, including AR, AAS, AD, and FA. We hope to help doctors and scientists understand allergic diseases systematically.
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Affiliation(s)
- Ji Wang
- National Institute of TCM constitution and Preventive Medicine, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, P.R. China
| | - Yumei Zhou
- National Institute of TCM constitution and Preventive Medicine, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, P.R. China
| | - Honglei Zhang
- National Institute of TCM constitution and Preventive Medicine, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, P.R. China
| | - Linhan Hu
- National Institute of TCM constitution and Preventive Medicine, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, P.R. China
| | - Juntong Liu
- National Institute of TCM constitution and Preventive Medicine, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, P.R. China
| | - Lei Wang
- National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 1000210, China
| | - Tianyi Wang
- National Institute of TCM constitution and Preventive Medicine, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, P.R. China
| | - Haiyun Zhang
- National Institute of TCM constitution and Preventive Medicine, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, P.R. China
| | - Linpeng Cong
- National Institute of TCM constitution and Preventive Medicine, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, P.R. China
| | - Qi Wang
- National Institute of TCM constitution and Preventive Medicine, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, P.R. China.
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8
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León B. Understanding the development of Th2 cell-driven allergic airway disease in early life. FRONTIERS IN ALLERGY 2023; 3:1080153. [PMID: 36704753 PMCID: PMC9872036 DOI: 10.3389/falgy.2022.1080153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 12/21/2022] [Indexed: 01/12/2023] Open
Abstract
Allergic diseases, including atopic dermatitis, allergic rhinitis, asthma, and food allergy, are caused by abnormal responses to relatively harmless foreign proteins called allergens found in pollen, fungal spores, house dust mites (HDM), animal dander, or certain foods. In particular, the activation of allergen-specific helper T cells towards a type 2 (Th2) phenotype during the first encounters with the allergen, also known as the sensitization phase, is the leading cause of the subsequent development of allergic disease. Infants and children are especially prone to developing Th2 cell responses after initial contact with allergens. But in addition, the rates of allergic sensitization and the development of allergic diseases among children are increasing in the industrialized world and have been associated with living in urban settings. Particularly for respiratory allergies, greater susceptibility to developing allergic Th2 cell responses has been shown in children living in urban environments containing low levels of microbial contaminants, principally bacterial endotoxins [lipopolysaccharide (LPS)], in the causative aeroallergens. This review highlights the current understanding of the factors that balance Th2 cell immunity to environmental allergens, with a particular focus on the determinants that program conventional dendritic cells (cDCs) toward or away from a Th2 stimulatory function. In this context, it discusses transcription factor-guided functional specialization of type-2 cDCs (cDC2s) and how the integration of signals derived from the environment drives this process. In addition, it analyzes observational and mechanistic studies supporting an essential role for innate sensing of microbial-derived products contained in aeroallergens in modulating allergic Th2 cell immune responses. Finally, this review examines whether hyporesponsiveness to microbial stimulation, particularly to LPS, is a risk factor for the induction of Th2 cell responses and allergic sensitization during infancy and early childhood and the potential factors that may affect early-age response to LPS and other environmental microbial components.
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Affiliation(s)
- Beatriz León
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, United States
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9
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Ceasrine AM, Devlin BA, Bolton JL, Green LA, Jo YC, Huynh C, Patrick B, Washington K, Sanchez CL, Joo F, Campos-Salazar AB, Lockshin ER, Kuhn C, Murphy SK, Simmons LA, Bilbo SD. Maternal diet disrupts the placenta-brain axis in a sex-specific manner. Nat Metab 2022; 4:1732-1745. [PMID: 36443520 PMCID: PMC10507630 DOI: 10.1038/s42255-022-00693-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 10/17/2022] [Indexed: 11/30/2022]
Abstract
High maternal weight is associated with detrimental outcomes in offspring, including increased susceptibility to neurological disorders such as anxiety, depression and communicative disorders. Despite widespread acknowledgement of sex biases in the development of these disorders, few studies have investigated potential sex-biased mechanisms underlying disorder susceptibility. Here, we show that a maternal high-fat diet causes endotoxin accumulation in fetal tissue, and subsequent perinatal inflammation contributes to sex-specific behavioural outcomes in offspring. In male offspring exposed to a maternal high-fat diet, increased macrophage Toll-like receptor 4 signalling results in excess microglial phagocytosis of serotonin (5-HT) neurons in the developing dorsal raphe nucleus, decreasing 5-HT bioavailability in the fetal and adult brains. Bulk sequencing from a large cohort of matched first-trimester human samples reveals sex-specific transcriptome-wide changes in placental and brain tissue in response to maternal triglyceride accumulation (a proxy for dietary fat content). Further, fetal brain 5-HT levels decrease as placental triglycerides increase in male mice and male human samples. These findings uncover a microglia-dependent mechanism through which maternal diet can impact offspring susceptibility for neuropsychiatric disorder development in a sex-specific manner.
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Affiliation(s)
- Alexis M Ceasrine
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
| | - Benjamin A Devlin
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
| | - Jessica L Bolton
- Neuroscience Institute, Georgia State University, Atlanta, GA, USA
| | - Lauren A Green
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
| | - Young Chan Jo
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
| | - Carolyn Huynh
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
| | - Bailey Patrick
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
| | - Kamryn Washington
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
| | - Cristina L Sanchez
- Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, NC, USA
| | - Faith Joo
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
| | | | - Elana R Lockshin
- Department of Neurobiology, Duke University Medical Center, Durham, NC, USA
| | - Cynthia Kuhn
- Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, NC, USA
| | - Susan K Murphy
- Department of Obstetrics and Gynecology, Duke University Medical Center, Durham, NC, USA
| | - Leigh Ann Simmons
- Department of Human Ecology, Perinatal Origins of Disparities Center, University of California, Davis, Davis, CA, USA
| | - Staci D Bilbo
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA.
- Department of Neurobiology, Duke University Medical Center, Durham, NC, USA.
- Massachusetts General Hospital, Boston, MA, USA.
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10
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Tuazon JA, Kilburg-Basnyat B, Oldfield LM, Wiscovitch-Russo R, Dunigan-Russell K, Fedulov AV, Oestreich KJ, Gowdy KM. Emerging Insights into the Impact of Air Pollution on Immune-Mediated Asthma Pathogenesis. Curr Allergy Asthma Rep 2022; 22:77-92. [PMID: 35394608 PMCID: PMC9246904 DOI: 10.1007/s11882-022-01034-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/13/2022] [Indexed: 12/13/2022]
Abstract
PURPOSE OF REVIEW Increases in ambient levels of air pollutants have been linked to lung inflammation and remodeling, processes that lead to the development and exacerbation of allergic asthma. Conventional research has focused on the role of CD4+ T helper 2 (TH2) cells in the pathogenesis of air pollution-induced asthma. However, much work in the past decade has uncovered an array of air pollution-induced non-TH2 immune mechanisms that contribute to allergic airway inflammation and disease. RECENT FINDINGS In this article, we review current research demonstrating the connection between common air pollutants and their downstream effects on non-TH2 immune responses emerging as key players in asthma, including PRRs, ILCs, and non-TH2 T cell subsets. We also discuss the proposed mechanisms by which air pollution increases immune-mediated asthma risk, including pre-existing genetic risk, epigenetic alterations in immune cells, and perturbation of the composition and function of the lung and gut microbiomes. Together, these studies reveal the multifaceted impacts of various air pollutants on innate and adaptive immune functions via genetic, epigenetic, and microbiome-based mechanisms that facilitate the induction and worsening of asthma.
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Affiliation(s)
- J A Tuazon
- Department of Microbial Infection and Immunity, The Ohio State University Wexner Medical Center, Columbus, OH, 43210, USA
- Medical Scientist Training Program, The Ohio State University, Columbus, OH, 43210, USA
| | - B Kilburg-Basnyat
- Department of Pharmacology and Toxicology, East Carolina University, Greenville, NC, 27858, USA
| | - L M Oldfield
- Department of Synthetic Biology and Bioenergy, J. Craig Venter Institute, Rockville, MD, 20850, USA
- Department of Synthetic Genomics, Replay Holdings LLC, San Diego, 92121, USA
| | - R Wiscovitch-Russo
- Department of Synthetic Biology and Bioenergy, J. Craig Venter Institute, Rockville, MD, 20850, USA
| | - K Dunigan-Russell
- Division of Pulmonary, Critical Care, and Sleep Medicine, The Ohio State University Wexner Medical Center, Davis Heart and Lung Research Institute, Columbus, OH, 43210, USA
| | - A V Fedulov
- Division of Surgical Research, Department of Surgery, Alpert Medical School, Brown University, Rhode Island Hospital, Providence, RI, 02903, USA
| | - K J Oestreich
- Department of Microbial Infection and Immunity, The Ohio State University Wexner Medical Center, Columbus, OH, 43210, USA
- Pelotonia Institute for Immuno-Oncology, The Ohio State University, The James Comprehensive Cancer Center, Columbus, OH, 43210, USA
| | - K M Gowdy
- Division of Pulmonary, Critical Care, and Sleep Medicine, The Ohio State University Wexner Medical Center, Davis Heart and Lung Research Institute, Columbus, OH, 43210, USA.
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11
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Fink MY, Qi X, Shirey KA, Fanaroff R, Chapoval S, Viscardi RM, Vogel SN, Keegan AD. Mice Expressing Cosegregating Single Nucleotide Polymorphisms (D298G and N397I) in TLR4 Have Enhanced Responses to House Dust Mite Allergen. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2022; 208:2085-2097. [PMID: 35396219 PMCID: PMC9176710 DOI: 10.4049/jimmunol.2100926] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 02/28/2022] [Indexed: 12/13/2022]
Abstract
Asthma is a common and ubiquitous chronic respiratory disease that is associated with airway inflammation and hyperreactivity resulting in airway obstruction. It is now accepted that asthma is controlled by a combination of host genetics and environment in a rather complex fashion; however, the link between sensing of the environment and development and exacerbation of allergic lung inflammation is unclear. Human populations expressing cosegregating D299G and T399I polymorphisms in the TLR4 gene are associated with a decreased risk for asthma in adults along with hyporesponsiveness to inhaled LPS, the TLR4 ligand. However, these data do not account for other human genetic or environmental factors. Using a novel mouse strain that expresses homologous human TLR4 polymorphisms (TLR4-single nucleotide polymorphism [SNP]), we directly tested the effect of these TLR4 polymorphisms on in vivo responses to allergens using two models of induction. We report that intact TLR4 is required for allergic inflammation when using the OVA and LPS model of induction, as cellular and pathological benchmarks were diminished in both TLR4-SNP and TLR4-deficent mice. However, in the more clinically relevant model using house dust mite extract for induction, responses were enhanced in the TLR4-SNP mice, as evidenced by greater levels of eosinophilic inflammation, Th2 cytokine production, and house dust mite-specific IgG1 production compared with wild-type mice; however, mucus production and airway hyperreactivity were not affected. These results suggest that the TLR4 polymorphic variants (genes) interact differently with the allergic stimulation (environment).
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Affiliation(s)
- Marc Y Fink
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, MD.,Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD
| | - Xiulan Qi
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, MD
| | - Kari Ann Shirey
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD
| | - Rachel Fanaroff
- Department of Anatomical Pathology, University of Maryland Medical Center, Baltimore, MD
| | - Svetlana Chapoval
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, MD.,Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD
| | - Rose M Viscardi
- Department of Pediatrics, University of Maryland School of Medicine, Baltimore, MD; and
| | - Stefanie N Vogel
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD
| | - Achsah D Keegan
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, MD; .,Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD.,Maryland Health Care System, Baltimore VA Medical Center, Baltimore, MD
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12
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Iberg CA, Bourque J, Fallahee I, Son S, Hawiger D. TNF-α sculpts a maturation process in vivo by pruning tolerogenic dendritic cells. Cell Rep 2022; 39:110657. [PMID: 35417681 PMCID: PMC9113652 DOI: 10.1016/j.celrep.2022.110657] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 02/16/2022] [Accepted: 03/18/2022] [Indexed: 12/12/2022] Open
Abstract
It remains unclear how the pro-immunogenic maturation of conventional dendritic cells (cDCs) abrogates their tolerogenic functions. Here, we report that the loss of tolerogenic functions depends on the rapid death of BTLAhi cDC1s, which, in the steady state, are present in systemic peripheral lymphoid organs and promote tolerance that limits subsequent immune responses. A canonical inducer of maturation, lipopolysaccharide (LPS), initiates a burst of tumor necrosis factor alpha (TNF-α) production and the resultant acute death of BTLAhi cDC1s mediated by tumor necrosis factor receptor 1. The ablation of these individual tolerogenic cDCs is amplified by TNF-α produced by neighboring cells. This loss of tolerogenic cDCs is transient, accentuating the restoration of homeostatic conditions through biological turnover of cDCs in vivo. Therefore, our results reveal that the abrogation of tolerogenic functions during an acute immunogenic maturation depends on an ablation of the tolerogenic cDC population, resulting in a dynamic remodeling of the cDC functional landscape.
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Affiliation(s)
- Courtney A Iberg
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, MO, USA
| | - Jessica Bourque
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, MO, USA
| | - Ian Fallahee
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, MO, USA
| | - Sungho Son
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, MO, USA
| | - Daniel Hawiger
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, MO, USA.
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13
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Chen G, Chen D, Feng Y, Wu W, Gao J, Chang C, Chen S, Zhen G. Identification of Key Signaling Pathways and Genes in Eosinophilic Asthma and Neutrophilic Asthma by Weighted Gene Co-Expression Network Analysis. Front Mol Biosci 2022; 9:805570. [PMID: 35187081 PMCID: PMC8847715 DOI: 10.3389/fmolb.2022.805570] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 01/10/2022] [Indexed: 12/14/2022] Open
Abstract
Background: Asthma is a heterogeneous disease with different subtypes including eosinophilic asthma (EA) and neutrophilic asthma (NA). However, the mechanisms underlying the difference between the two subtypes are not fully understood.Methods: Microarray datasets (GSE45111 and GSE137268) were acquired from Gene Expression Omnibus (GEO) database. Differentially expressed genes (DEGs) in induced sputum between EA (n = 24) and NA (n = 15) were identified by “Limma” package. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses and Gene set enrichment analysis (GSEA) were used to explore potential signaling pathways. Weighted gene co-expression network analysis (WGCNA) were performed to identify the key genes that were strongly associated with EA and NA.Results: A total of 282 DEGs were identified in induced sputum of NA patients compared with EA patients. In GO and KEGG pathway analyses, DEGs were enriched in positive regulation of cytokine production, and cytokine-cytokine receptor interaction. The results of GSEA showed that ribosome, Parkinson’s disease, and oxidative phosphorylation were positively correlated with EA while toll-like receptor signaling pathway, primary immunodeficiency, and NOD-like receptor signaling pathway were positively correlated with NA. Using WGCNA analysis, we identified a set of genes significantly associated NA including IRFG, IRF1, STAT1, IFIH1, IFIT3, GBP1, GBP5, IFIT2, CXCL9, and CXCL11.Conclusion: We identified potential signaling pathways and key genes involved in the pathogenesis of the asthma subsets, especially in neutrophilic asthma.
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Affiliation(s)
- Gongqi Chen
- Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Respiratory Diseases, National Health Commission of People’s Republic of China, National Clinical Research Center for Respiratory Diseases, Wuhan, China
| | - Dian Chen
- Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Respiratory Diseases, National Health Commission of People’s Republic of China, National Clinical Research Center for Respiratory Diseases, Wuhan, China
| | - Yuchen Feng
- Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Respiratory Diseases, National Health Commission of People’s Republic of China, National Clinical Research Center for Respiratory Diseases, Wuhan, China
| | - Wenliang Wu
- Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Respiratory Diseases, National Health Commission of People’s Republic of China, National Clinical Research Center for Respiratory Diseases, Wuhan, China
| | - Jiali Gao
- Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Respiratory Diseases, National Health Commission of People’s Republic of China, National Clinical Research Center for Respiratory Diseases, Wuhan, China
| | - Chenli Chang
- Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Respiratory Diseases, National Health Commission of People’s Republic of China, National Clinical Research Center for Respiratory Diseases, Wuhan, China
| | - Shengchong Chen
- Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Respiratory Diseases, National Health Commission of People’s Republic of China, National Clinical Research Center for Respiratory Diseases, Wuhan, China
| | - Guohua Zhen
- Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Respiratory Diseases, National Health Commission of People’s Republic of China, National Clinical Research Center for Respiratory Diseases, Wuhan, China
- *Correspondence: Guohua Zhen,
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14
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Headland SE, Dengler HS, Xu D, Teng G, Everett C, Ratsimandresy RA, Yan D, Kang J, Ganeshan K, Nazarova EV, Gierke S, Wedeles CJ, Guidi R, DePianto DJ, Morshead KB, Huynh A, Mills J, Flanagan S, Hambro S, Nunez V, Klementowicz JE, Shi Y, Wang J, Bevers J, Ramirez-Carrozzi V, Pappu R, Abbas A, Vander Heiden J, Choy DF, Yadav R, Modrusan Z, Panettieri RA, Koziol-White C, Jester WF, Jenkins BJ, Cao Y, Clarke C, Austin C, Lafkas D, Xu M, Wolters PJ, Arron JR, West NR, Wilson MS. Oncostatin M expression induced by bacterial triggers drives airway inflammatory and mucus secretion in severe asthma. Sci Transl Med 2022; 14:eabf8188. [PMID: 35020406 DOI: 10.1126/scitranslmed.abf8188] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- Sarah E Headland
- Immunology Discovery,Genentech Inc., South San Francisco, CA 94080, USA
| | - Hart S Dengler
- Immunology Discovery,Genentech Inc., South San Francisco, CA 94080, USA
| | - Daqi Xu
- Immunology Discovery,Genentech Inc., South San Francisco, CA 94080, USA
| | - Grace Teng
- Immunology Discovery,Genentech Inc., South San Francisco, CA 94080, USA
| | - Christine Everett
- Biochemical and Cellular Pharmacology, Genentech Inc., South San Francisco, CA 94080, USA
| | | | - Donghong Yan
- Translational Immunology, Genentech Inc., South San Francisco, CA 94080, USA
| | - Jing Kang
- Translational Immunology, Genentech Inc., South San Francisco, CA 94080, USA
| | - Kirthana Ganeshan
- Immunology Discovery,Genentech Inc., South San Francisco, CA 94080, USA
| | | | - Sarah Gierke
- Center for Advanced Light Microscopy, Genentech Inc., South San Francisco, CA 94080, USA.,Pathology, Genentech Inc., South San Francisco, CA 94080, USA
| | | | - Riccardo Guidi
- Immunology Discovery,Genentech Inc., South San Francisco, CA 94080, USA
| | - Daryle J DePianto
- Immunology Discovery,Genentech Inc., South San Francisco, CA 94080, USA
| | | | - Alison Huynh
- Necropsy, Genentech Inc., South San Francisco, CA 94080, USA
| | - Jessica Mills
- Necropsy, Genentech Inc., South San Francisco, CA 94080, USA
| | - Sean Flanagan
- Necropsy, Genentech Inc., South San Francisco, CA 94080, USA
| | - Shannon Hambro
- Necropsy, Genentech Inc., South San Francisco, CA 94080, USA
| | - Victor Nunez
- Necropsy, Genentech Inc., South San Francisco, CA 94080, USA
| | | | - Yongchang Shi
- Biochemical and Cellular Pharmacology, Genentech Inc., South San Francisco, CA 94080, USA
| | - Jianyong Wang
- Biochemical and Cellular Pharmacology, Genentech Inc., South San Francisco, CA 94080, USA
| | - Jack Bevers
- Antibody Discovery, Genentech Inc., South San Francisco, CA 94080, USA
| | | | - Rajita Pappu
- Immunology Discovery,Genentech Inc., South San Francisco, CA 94080, USA
| | - Alex Abbas
- OMNI Bioinformatics, Genentech Inc., South San Francisco, CA 94080, USA
| | | | - David F Choy
- Biomarker Discovery OMNI, Genentech Inc., South San Francisco, CA 94080, USA
| | - Rajbharan Yadav
- Preclinical and Translational Pharmacokinetics and Pharmacodynamics, Genentech Inc., South San Francisco, CA 94080, USA
| | - Zora Modrusan
- Molecular Biology, Genentech Inc., South San Francisco, CA 94080, USA
| | - Reynold A Panettieri
- Rutgers Institute for Translational Medicine and Science, State University of New Jersey, New Brunswick, NJ 08901, USA
| | - Cynthia Koziol-White
- Rutgers Institute for Translational Medicine and Science, State University of New Jersey, New Brunswick, NJ 08901, USA
| | - William F Jester
- Rutgers Institute for Translational Medicine and Science, State University of New Jersey, New Brunswick, NJ 08901, USA
| | - Brendan J Jenkins
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton, Victoria, Australia.,Department of Molecular Translational Science, Faculty of Medicine, Nursing, and Health Sciences, Monash University, Clayton, Victoria 3800, Australia
| | - Yi Cao
- OMNI Bioinformatics, Genentech Inc., South San Francisco, CA 94080, USA
| | - Christine Clarke
- OMNI Bioinformatics, Genentech Inc., South San Francisco, CA 94080, USA
| | - Cary Austin
- Pathology, Genentech Inc., South San Francisco, CA 94080, USA
| | - Daniel Lafkas
- Immunology Discovery,Genentech Inc., South San Francisco, CA 94080, USA
| | - Min Xu
- Translational Immunology, Genentech Inc., South San Francisco, CA 94080, USA
| | - Paul J Wolters
- Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, Department of Medicine, University of California, San Francisco, San Francisco, CA 94110, USA
| | - Joseph R Arron
- Immunology Discovery,Genentech Inc., South San Francisco, CA 94080, USA
| | - Nathaniel R West
- Cancer Immunology Discovery, Genentech Inc., South San Francisco, CA 94080, USA
| | - Mark S Wilson
- Immunology Discovery,Genentech Inc., South San Francisco, CA 94080, USA
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15
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Yong HM, Gour N, Sharma D, Khalil SM, Lane AP, Lajoie S. Epigenetic regulation of epithelial dectin-1 through an IL-33-STAT3 axis in allergic disease. Allergy 2022; 77:207-217. [PMID: 33982290 PMCID: PMC10580706 DOI: 10.1111/all.14898] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Revised: 04/10/2021] [Accepted: 04/14/2021] [Indexed: 12/15/2022]
Abstract
Allergic diseases arise in susceptible individuals in part because of decrements in protective pathways. The mechanism by which these anti-inflammatory molecules become repressed remains unclear. We have previously reported that epithelial dectin-1 prevents aberrant type 2 responses and is downregulated in the epithelium of allergic patients. Here, we report that dectin-1 is constitutively expressed by the respiratory epithelium in humans and that IL-33 specifically acts as a repressor of dectin-1. Mechanistically, this occurs via IL-33-dependent STAT3 activation and the subsequent repression of the dectin-1 gene, CLEC7A. We have identified a novel enhancer region upstream of the proximal promoter of CLEC7A that is only accessible in epithelial cells, but not in hematopoietic cells. Epigenetic repression of CLEC7A through this newly identified locus, downstream of an aberrant IL-33-STAT3 axis, occurs in the epithelium of allergic individuals. Collectively, our data identify a mechanism of epigenetic fine-tuning of dectin-1 expression in epithelial cells that may participate in allergenicity.
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Affiliation(s)
- Hwan Mee Yong
- Department of Otolaryngology, Johns Hopkins School of Medicine, Baltimore, MD
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Naina Gour
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins School of Medicine, Baltimore, MD
| | - Deepika Sharma
- Department of Otolaryngology, Johns Hopkins School of Medicine, Baltimore, MD
| | - Syed Muaz Khalil
- Department of Otolaryngology, Johns Hopkins School of Medicine, Baltimore, MD
| | - Andrew P. Lane
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Stephane Lajoie
- Department of Otolaryngology, Johns Hopkins School of Medicine, Baltimore, MD
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
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16
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Kaur K, Bachus H, Lewis C, Papillion AM, Rosenberg AF, Ballesteros-Tato A, León B. GM-CSF production by non-classical monocytes controls antagonistic LPS-driven functions in allergic inflammation. Cell Rep 2021; 37:110178. [PMID: 34965421 PMCID: PMC8759241 DOI: 10.1016/j.celrep.2021.110178] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 10/25/2021] [Accepted: 12/06/2021] [Indexed: 12/13/2022] Open
Abstract
Lipopolysaccharide (LPS) can either promote or prevent T helper 2 (Th2) cell allergic responses. However, the underlying mechanism remains unknown. We show here that LPS activity switches from pro-pathogenic to protective depending on the production of granulocyte-macrophage colony-stimulating factor (GM-CSF) by non-classical monocytes. In the absence of GM-CSF, LPS can favor pathogenic Th2 cell responses by supporting the trafficking of lung-migratory dendritic cells (mDC2s) into the lung-draining lymph node. However, when non-classical monocytes produce GM-CSF, LPS and GM-CSF synergize to differentiate monocyte-derived DCs from classical Ly6Chi monocytes that instruct mDC2s for Th2 cell suppression. Importantly, only allergens with cysteine protease activity trigger GM-CSF production by non-classical monocytes. Hence, the therapeutic effect of LPS is restricted to allergens with this enzymatic activity. Treatment with GM-CSF, however, restores the protective effects of LPS. Thus, GM-CSF produced by non-classical monocytes acts as a rheostat that fine-tunes the pathogenic and therapeutic functions of LPS.
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Affiliation(s)
- Kamaljeet Kaur
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Holly Bachus
- Department of Medicine, Division of Clinical Immunology and Rheumatology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Crystal Lewis
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Amber M Papillion
- Department of Medicine, Division of Clinical Immunology and Rheumatology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Alexander F Rosenberg
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - André Ballesteros-Tato
- Department of Medicine, Division of Clinical Immunology and Rheumatology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Beatriz León
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
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17
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Georas SN. Inhaled Adjuvants and Eosinophilic Airway Inflammation in Asthma: Is a Little Bit of Lipopolysaccharide the Key to Allergen Sensitization? THE JOURNAL OF IMMUNOLOGY 2021; 207:1699-1701. [PMID: 34544811 DOI: 10.4049/jimmunol.2100542] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Steve N Georas
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Rochester Medical Center, Rochester, NY
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18
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Hong MH, Kashif A, Kim G, Park BS, Lee NR, Yang EJ, Mun JY, Choi H, Kim SH, Kim HJ, Lee SJ, Lee JS, Hong Y, Kim IS. Der p 38 Is a Bidirectional Regulator of Eosinophils and Neutrophils in Allergy. THE JOURNAL OF IMMUNOLOGY 2021; 207:1735-1746. [PMID: 34462314 DOI: 10.4049/jimmunol.2001144] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 06/17/2021] [Indexed: 11/19/2022]
Abstract
The house dust mite is the most common cause of allergic diseases, and TLR4 acts as an overarching receptor for allergic responses. This study aimed to identify novel allergen binding to TLR4 in house dust mites and unveil its unique role in allergic responses. Der p 38 was purified and characterized by liquid chromatography tandem mass spectrometry-based peptide mapping. Biolayer interferometry and structure modeling unveiled TLR4-binding activity and the structure of recombinant Der p 38. The allergenicity of Der p 38 was confirmed by a skin prick test, and basophil activation and dot blot assays. The skin prick test identified 24 out of 45 allergic subjects (53.3%) as Der p 38+ subjects. Der p 38-augmented CD203c expression was noted in the basophils of Der p 38+ allergic subjects. In animal experiments with wild-type and TLR4 knockout BALB/c mice, Der p 38 administration induced the infiltration of neutrophils as well as eosinophils and exhibited clinical features similar to asthma via TLR4 activation. Persistent Der p 38 administration induced severe neutrophil inflammation. Der p 38 directly suppressed the apoptosis of allergic neutrophils and eosinophils, and enhanced cytokine production in human bronchial epithelial cells, inhibiting neutrophil apoptosis. The mechanisms involved TLR4, LYN, PI3K, AKT, ERK, and NF-κB. These findings may contribute to a deep understanding of Der p 38 as a bridge allergen between eosinophilic and neutrophilic inflammation in the pathogenic mechanisms of allergy.
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Affiliation(s)
- Min Hwa Hong
- Department of Senior Healthcare, Eulji University, Uijeongbu, Republic of Korea
| | - Ayesha Kashif
- Department of Senior Healthcare, Eulji University, Uijeongbu, Republic of Korea
| | - Geunyeong Kim
- Department of Senior Healthcare, Eulji University, Uijeongbu, Republic of Korea
| | - Beom Seok Park
- Department of Senior Healthcare, Eulji University, Uijeongbu, Republic of Korea.,Department of Biomedical Laboratory Science, College of Health Science, Eulji University, Seongnam, Republic of Korea
| | - Na Rae Lee
- Department of Biomedical Laboratory Science, College of Health Science, Eulji University, Uijeongbu, Republic of Korea
| | - Eun Ju Yang
- Department of Clinical Laboratory Science, Daegu Haany University, Gyeongsan, Republic of Korea
| | - Ji Young Mun
- Neural Circuit Research Group, Korea Brain Research Institute, Daegu, Republic of Korea
| | - Hyosun Choi
- Department of Senior Healthcare, Eulji University, Uijeongbu, Republic of Korea.,Neural Circuit Research Group, Korea Brain Research Institute, Daegu, Republic of Korea
| | - Sang-Hoon Kim
- Department of Internal Medicine, School of Medicine, Eulji University, Daejeon, Republic of Korea
| | - Hyun Jik Kim
- Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Soo Jin Lee
- Department of Pediatrics, School of Medicine, Eulji University, Daejeon, Republic of Korea; and
| | - Ji-Sook Lee
- Department of Clinical Laboratory Science, Wonkwang Health Science University, Iksan, Republic of Korea
| | - Yujin Hong
- Department of Senior Healthcare, Eulji University, Uijeongbu, Republic of Korea.,Department of Biomedical Laboratory Science, College of Health Science, Eulji University, Uijeongbu, Republic of Korea
| | - In Sik Kim
- Department of Senior Healthcare, Eulji University, Uijeongbu, Republic of Korea; .,Department of Biomedical Laboratory Science, College of Health Science, Eulji University, Uijeongbu, Republic of Korea
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19
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Ishii T, Murakami Y, Narita T, Nunokawa H, Miyake K, Nagase T, Yamashita N. Myeloid differentiation protein-2 has a protective role in house dust mite-mediated asthmatic characteristics with the proinflammatory regulation of airway epithelial cells and dendritic cells. Clin Exp Allergy 2021; 52:149-161. [PMID: 34418187 DOI: 10.1111/cea.14002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 08/17/2021] [Indexed: 12/19/2022]
Abstract
BACKGROUND Myeloid differentiation protein-2 (MD-2) is a lipopolysaccharide-binding protein involved in lipopolysaccharide signalling via Toll-like receptor 4 (TLR4). TLR4 plays an essential role in HDM-mediated allergic airway inflammation. Moreover, MD-2 is structurally similar to Der f 2, a major allergen from house dust mite (HDM). OBJECTIVES We aimed to clarify the role of MD-2 in the pathogenesis of HDM-mediated allergic airway inflammation. METHODS Wild-type (WT), TLR4 knockout and MD-2 knockout mice were subjected to intranasal instillation of HDM extract, and asthmatic features were evaluated. We also evaluated gene sets regulated by MD-2 in HDM-treated airway epithelial cells and examined the function of dendritic cells from lymph nodes and from lungs. RESULTS Aggravated allergic airway inflammation with increased airway hyperresponsiveness was observed in MD-2 knockout mice compared with WT and TLR4 knockout mice. Global gene expression analysis revealed an MD-2 regulated proinflammatory response and reconstituted TLR4 signalling in airway epithelial cells. The ability of dendritic cells to evoke an allergic immune response was enhanced in MD-2 knockout mice. CONCLUSIONS & CLINICAL RELEVANCE MD-2 plays a protective role in HDM-induced airway allergy with the proinflammatory regulation of airway epithelial cells and dendritic cells. MD-2 may serve as a therapeutic target in the treatment of asthma.
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Affiliation(s)
- Takashi Ishii
- Department of Pharmacotherapy, Research Institute of Pharmaceutical Sciences, Musashino University, Tokyo, Japan.,Department of Respiratory Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yusuke Murakami
- Department of Pharmacotherapy, Research Institute of Pharmaceutical Sciences, Musashino University, Tokyo, Japan
| | - Tomoya Narita
- Department of Pharmacotherapy, Research Institute of Pharmaceutical Sciences, Musashino University, Tokyo, Japan
| | - Hiroki Nunokawa
- Department of Pharmacotherapy, Research Institute of Pharmaceutical Sciences, Musashino University, Tokyo, Japan
| | - Kensuke Miyake
- Division of Innate Immunity, Department of Microbiology and immunology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Takahide Nagase
- Department of Respiratory Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Naomi Yamashita
- Department of Pharmacotherapy, Research Institute of Pharmaceutical Sciences, Musashino University, Tokyo, Japan
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20
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Yu J, Zhu C, Wang X, Kim K, Bartolome A, Dongiovanni P, Yates KP, Valenti L, Carrer M, Sadowski T, Qiang L, Tabas I, Lavine JE, Pajvani UB. Hepatocyte TLR4 triggers inter-hepatocyte Jagged1/Notch signaling to determine NASH-induced fibrosis. Sci Transl Med 2021; 13:eabe1692. [PMID: 34162749 PMCID: PMC8792974 DOI: 10.1126/scitranslmed.abe1692] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 02/19/2021] [Accepted: 05/26/2021] [Indexed: 12/19/2022]
Abstract
Aberrant hepatocyte Notch activity is critical to the development of nonalcoholic steatohepatitis (NASH)-induced liver fibrosis, but mechanisms underlying Notch reactivation in developed liver are unclear. Here, we identified that increased expression of the Notch ligand Jagged1 (JAG1) tracked with Notch activation and nonalcoholic fatty liver disease (NAFLD) activity score (NAS) in human liver biopsy specimens and mouse NASH models. The increase in Jag1 was mediated by hepatocyte Toll-like receptor 4 (TLR4)-nuclear factor κB (NF-κB) signaling in pericentral hepatocytes. Hepatocyte-specific Jag1 overexpression exacerbated fibrosis in mice fed a high-fat diet or a NASH-provoking diet rich in palmitate, cholesterol, and sucrose and reversed the protection afforded by hepatocyte-specific TLR4 deletion, whereas hepatocyte-specific Jag1 knockout mice were protected from NASH-induced liver fibrosis. To test therapeutic potential of this biology, we designed a Jag1-directed antisense oligonucleotide (ASO) and a hepatocyte-specific N-acetylgalactosamine (GalNAc)-modified siRNA, both of which reduced NASH diet-induced liver fibrosis in mice. Overall, these data demonstrate that increased hepatocyte Jagged1 is the proximal hit for Notch-induced liver fibrosis in mice and suggest translational potential of Jagged1 inhibitors in patients with NASH.
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Affiliation(s)
- Junjie Yu
- Department of Medicine, Columbia University, New York, NY 10032, USA
| | - Changyu Zhu
- Department of Medicine, Columbia University, New York, NY 10032, USA
| | - Xiaobo Wang
- Department of Medicine, Columbia University, New York, NY 10032, USA
| | - KyeongJin Kim
- Department of Medicine, Columbia University, New York, NY 10032, USA
| | - Alberto Bartolome
- Department of Medicine, Columbia University, New York, NY 10032, USA
| | - Paola Dongiovanni
- General Medicine and Metabolic Diseases, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan 20122, Italy
| | - Katherine P Yates
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
| | - Luca Valenti
- Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan 20122, Italy
- Translational Medicine, Department of Transfusion Medicine and Hematology, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan 20122, Italy
| | | | | | - Li Qiang
- Department of Pathology and Cell Biology, Columbia University, New York, NY 10032, USA
| | - Ira Tabas
- Department of Medicine, Columbia University, New York, NY 10032, USA
- Department of Pathology and Cell Biology, Columbia University, New York, NY 10032, USA
- Department of Physiology, Columbia University, New York, NY 10032, USA
| | - Joel E Lavine
- Department of Pediatrics, Columbia University, New York, NY 10032, USA
| | - Utpal B Pajvani
- Department of Medicine, Columbia University, New York, NY 10032, USA.
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21
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Özkan M, Eskiocak YC, Wingender G. Macrophage and dendritic cell subset composition can distinguish endotypes in adjuvant-induced asthma mouse models. PLoS One 2021; 16:e0250533. [PMID: 34061861 PMCID: PMC8168852 DOI: 10.1371/journal.pone.0250533] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 05/18/2021] [Indexed: 12/27/2022] Open
Abstract
Asthma is a heterogeneous disease with neutrophilic and eosinophilic asthma as the main endotypes that are distinguished according to the cells recruited to the airways and the related pathology. Eosinophilic asthma is the treatment-responsive endotype, which is mainly associated with allergic asthma. Neutrophilic asthma is a treatment-resistant endotype, affecting 5-10% of asthmatics. Although eosinophilic asthma is well-studied, a clear understanding of the endotypes is essential to devise effective diagnosis and treatment approaches for neutrophilic asthma. To this end, we directly compared adjuvant-induced mouse models of neutrophilic (CFA/OVA) and eosinophilic (Alum/OVA) asthma side-by-side. The immune response in the inflamed lung was analyzed by multi-parametric flow cytometry and immunofluorescence. We found that eosinophilic asthma was characterized by a preferential recruitment of interstitial macrophages and myeloid dendritic cells, whereas in neutrophilic asthma plasmacytoid dendritic cells, exudate macrophages, and GL7+ activated B cells predominated. This differential distribution of macrophage and dendritic cell subsets reveals important aspects of the pathophysiology of asthma and holds the promise to be used as biomarkers to diagnose asthma endotypes.
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Affiliation(s)
- Müge Özkan
- Department of Genome Sciences and Molecular Biotechnology, Izmir International Biomedicine and Genome Institute, Dokuz Eylul University, Balcova/Izmir, Turkey
| | | | - Gerhard Wingender
- Izmir Biomedicine and Genome Center (IBG), Balcova/Izmir, Turkey
- Department of Biomedicine and Health Technologies, Izmir International Biomedicine and Genome Institute, Dokuz Eylul University, Balcova/Izmir, Turkey
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22
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Lycopene Inhibits Toll-Like Receptor 4-Mediated Expression of Inflammatory Cytokines in House Dust Mite-Stimulated Respiratory Epithelial Cells. Molecules 2021; 26:molecules26113127. [PMID: 34073777 PMCID: PMC8197212 DOI: 10.3390/molecules26113127] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 05/14/2021] [Accepted: 05/17/2021] [Indexed: 01/31/2023] Open
Abstract
House dust mites (HDM) are critical factors in airway inflammation. They activate respiratory epithelial cells to produce reactive oxygen species (ROS) and activate Toll-like receptor 4 (TLR4). ROS induce the expression of inflammatory cytokines in respiratory epithelial cells. Lycopene is a potent antioxidant nutrient with anti-inflammatory activity. The present study aimed to investigate whether HDM induce intracellular and mitochondrial ROS production, TLR4 activation, and pro-inflammatory cytokine expression (IL-6 and IL-8) in respiratory epithelial A549 cells. Additionally, we examined whether lycopene inhibits HDM-induced alterations in A549 cells. The treatment of A549 cells with HDM activated TLR4, induced the expression of IL-6 and IL-8, and increased intracellular and mitochondrial ROS levels. TAK242, a TLR4 inhibitor, suppressed both HDM-induced ROS production and cytokine expression. Furthermore, lycopene inhibited the HDM-induced TLR4 activation and cytokine expression, along with reducing the intracellular and mitochondrial ROS levels in HDM-treated cells. These results collectively indicated that the HDM induced TLR4 activation and increased intracellular and mitochondrial ROS levels, thus resulting in the induction of cytokine expression in respiratory epithelial cells. The antioxidant lycopene could inhibit HDM-induced cytokine expression, possibly by suppressing TLR4 activation and reducing the intracellular and mitochondrial ROS levels in respiratory epithelial cells.
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23
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Temporal Contribution of Myeloid-Lineage TLR4 to the Transition to Chronic Pain: A Focus on Sex Differences. J Neurosci 2021; 41:4349-4365. [PMID: 33846230 DOI: 10.1523/jneurosci.1940-20.2021] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 02/23/2021] [Accepted: 04/02/2021] [Indexed: 01/09/2023] Open
Abstract
Complex regional pain syndrome (CRPS) is a chronic pain disorder with a clear acute-to-chronic transition. Preclinical studies demonstrate that toll-like receptor 4 (TLR4), expressed by myeloid-lineage cells, astrocytes, and neurons, mediates a sex-dependent transition to chronic pain; however, evidence is lacking on which exact TLR4-expressing cells are responsible. We used complementary pharmacologic and transgenic approaches in mice to more specifically manipulate myeloid-lineage TLR4 and outline its contribution to the transition from acute-to-chronic CRPS based on three key variables: location (peripheral vs central), timing (prevention vs treatment), and sex (male vs female). We demonstrate that systemic TLR4 antagonism is more effective at improving chronic allodynia trajectory when administered at the time of injury (early) in the tibial fracture model of CRPS in both sexes. In order to clarify the contribution of myeloid-lineage cells peripherally (macrophages) or centrally (microglia), we rigorously characterize a novel spatiotemporal transgenic mouse line, Cx3CR1-CreERT2-eYFP;TLR4fl/fl (TLR4 cKO) to specifically knock out TLR4 only in microglia and no other myeloid-lineage cells. Using this transgenic mouse, we find that early TLR4 cKO results in profound improvement in chronic, but not acute, allodynia in males, with a significant but less robust effect in females. In contrast, late TLR4 cKO results in partial improvement in allodynia in both sexes, suggesting that downstream cellular or molecular TLR4-independent events may have already been triggered. Overall, we find that the contribution of TLR4 is time- and microglia-dependent in both sexes; however, females also rely on peripheral myeloid-lineage (or other TLR4 expressing) cells to trigger chronic pain.SIGNIFICANCE STATEMENT The contribution of myeloid cell TLR4 to sex-specific pain progression remains controversial. We used complementary pharmacologic and transgenic approaches to specifically manipulate TLR4 based on three key variables: location (peripheral vs central), timing (prevention vs treatment), and sex (male vs female). We discovered that microglial TLR4 contributes to early pain progression in males, and to a lesser extent in females. We further found that maintenance of chronic pain likely occurs through myeloid TLR4-independent mechanisms in both sexes. Together, we define a more nuanced contribution of this receptor to the acute-to-chronic pain transition in a mouse model of complex regional pain syndrome.
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24
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Hong L, Wang Q, Chen M, Shi J, Guo Y, Liu S, Pan R, Yuan X, Jiang S. Mas receptor activation attenuates allergic airway inflammation via inhibiting JNK/CCL2-induced macrophage recruitment. Biomed Pharmacother 2021; 137:111365. [PMID: 33588264 DOI: 10.1016/j.biopha.2021.111365] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 01/26/2021] [Accepted: 02/02/2021] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Defective absorption of acute allergic airway inflammation is involved in the initiation and development of chronic asthma. After allergen exposure, there is a rapid recruitment of macrophages around the airways, which promote acute inflammatory responses. The Ang-(1-7)/Mas receptor axis reportedly plays protective roles in various tissue inflammation and remodeling processes in vivo. However, the exact role of Mas receptor and their underlying mechanisms during the pathology of acute allergic airway inflammation remains unclear. OBJECTIVE We investigated the role of Mas receptor in acute allergic asthma and explored its underlying mechanisms in vitro, aiming to find critical molecules and signal pathways. METHODS Mas receptor expression was assessed in ovalbumin (OVA)-induced acute asthmatic murine model. Then we estimated the anti-inflammatory role of Mas receptor in vivo and explored expressions of several known inflammatory cytokines as well as phosphorylation levels of MAPK pathways. Mas receptor functions and underlying mechanisms were studied further in the human bronchial epithelial cell line (16HBE). RESULTS Mas receptor expression decreased in acute allergic airway inflammation. Multiplex immunofluorescence co-localized Mas receptor and EpCAM, indicated that Mas receptor may function in the bronchial epithelium. Activating Mas receptor through AVE0991 significantly alleviated macrophage infiltration in airway inflammation, accompanied with down-regulation of CCL2 and phosphorylation levels of MAPK pathways. Further studies in 16HBE showed that AVE0991 pre-treatment inhibited LPS-induced or anisomycin-induced CCL2 increase and THP-1 macrophages migration via JNK pathways. CONCLUSION Our findings suggested that Mas receptor activation significantly attenuated CCL2 dependent macrophage recruitments in acute allergic airway inflammation through JNK pathways, which indicated that Mas receptor, CCL2 and phospho-JNK could be potential targets against allergic airway inflammation.
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Affiliation(s)
- Luna Hong
- Department of Pulmonary and Critical Care Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China; Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Qiujie Wang
- Department of Pulmonary and Critical Care Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China; Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Ming Chen
- Department of Pulmonary and Critical Care Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China; Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Jianting Shi
- Department of Pulmonary and Critical Care Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China; Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Yimin Guo
- Department of Pulmonary and Critical Care Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China; Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Shanying Liu
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China; Research Center of Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Ruijian Pan
- Departments of Electric Power Engineering, South China University of Technology, Guangzhou, China
| | - Xiaoqing Yuan
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China; Breast Tumor Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China.
| | - Shanping Jiang
- Department of Pulmonary and Critical Care Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China; Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, Guangdong, China.
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25
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Healey DCC, Cephus JY, Barone SM, Chowdhury NU, Dahunsi DO, Madden MZ, Ye X, Yu X, Olszewski K, Young K, Gerriets VA, Siska PJ, Dworski R, Hemler J, Locasale JW, Poyurovsky MV, Peebles RS, Irish JM, Newcomb DC, Rathmell JC. Targeting In Vivo Metabolic Vulnerabilities of Th2 and Th17 Cells Reduces Airway Inflammation. THE JOURNAL OF IMMUNOLOGY 2021; 206:1127-1139. [PMID: 33558372 DOI: 10.4049/jimmunol.2001029] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 01/12/2021] [Indexed: 12/17/2022]
Abstract
T effector cells promote inflammation in asthmatic patients, and both Th2 and Th17 CD4 T cells have been implicated in severe forms of the disease. The metabolic phenotypes and dependencies of these cells, however, remain poorly understood in the regulation of airway inflammation. In this study, we show the bronchoalveolar lavage fluid of asthmatic patients had markers of elevated glucose and glutamine metabolism. Further, peripheral blood T cells of asthmatics had broadly elevated expression of metabolic proteins when analyzed by mass cytometry compared with healthy controls. Therefore, we hypothesized that glucose and glutamine metabolism promote allergic airway inflammation. We tested this hypothesis in two murine models of airway inflammation. T cells from lungs of mice sensitized with Alternaria alternata extract displayed genetic signatures for elevated oxidative and glucose metabolism by single-cell RNA sequencing. This result was most pronounced when protein levels were measured in IL-17-producing cells and was recapitulated when airway inflammation was induced with house dust mite plus LPS, a model that led to abundant IL-4- and IL-17-producing T cells. Importantly, inhibitors of the glucose transporter 1 or glutaminase in vivo attenuated house dust mite + LPS eosinophilia, T cell cytokine production, and airway hyperresponsiveness as well as augmented the immunosuppressive properties of dexamethasone. These data show that T cells induce markers to support metabolism in vivo in airway inflammation and that this correlates with inflammatory cytokine production. Targeting metabolic pathways may provide a new direction to protect from disease and enhance the effectiveness of steroid therapy.
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Affiliation(s)
- Diana C Contreras Healey
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232
| | - Jacqueline Y Cephus
- Department of Medicine, Division of Pulmonary and Critical Care, Vanderbilt University Medical Center, Nashville, TN 37232
| | - Sierra M Barone
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37232
| | - Nowrin U Chowdhury
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232
| | - Debolanle O Dahunsi
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232
| | - Matthew Z Madden
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232
| | - Xiang Ye
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232
| | - Xuemei Yu
- Kadmon Corporation, New York, NY 10016
| | | | - Kirsten Young
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232
| | - Valerie A Gerriets
- Department of Basic Science, California Northstate University College of Medicine, Elk Grove, CA 95757
| | - Peter J Siska
- Internal Medicine III, University Hospital Regensburg, 93042 Regensburg, Germany
| | - Ryszard Dworski
- Department of Medicine, Division of Pulmonary and Critical Care, Vanderbilt University Medical Center, Nashville, TN 37232
| | - Jonathan Hemler
- Department of Pediatrics, University of Virginia, Charlottesville, VA 22904
| | - Jason W Locasale
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC 27710; and
| | | | - R Stokes Peebles
- Department of Medicine, Division of Pulmonary and Critical Care, Vanderbilt University Medical Center, Nashville, TN 37232.,Vanderbilt Center for Immunobiology, Vanderbilt University Medical Center, Nashville, TN 37232
| | - Jonathan M Irish
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37232.,Vanderbilt Center for Immunobiology, Vanderbilt University Medical Center, Nashville, TN 37232
| | - Dawn C Newcomb
- Department of Medicine, Division of Pulmonary and Critical Care, Vanderbilt University Medical Center, Nashville, TN 37232.,Vanderbilt Center for Immunobiology, Vanderbilt University Medical Center, Nashville, TN 37232
| | - Jeffrey C Rathmell
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232; .,Vanderbilt Center for Immunobiology, Vanderbilt University Medical Center, Nashville, TN 37232
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26
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Liu M, Lu J, Zhang Q, Zhang Y, Guo Z. Clara cell 16 KDa protein mitigates house dust mite-induced airway inflammation and damage via regulating airway epithelial cell apoptosis in a manner dependent on HMGB1-mediated signaling inhibition. Mol Med 2021; 27:11. [PMID: 33541260 PMCID: PMC7863538 DOI: 10.1186/s10020-021-00277-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 01/27/2021] [Indexed: 12/28/2022] Open
Abstract
Background House dust mite (HDM) inhalation can cause airway epithelial damage which is implicated in the process of airway inflammation in asthma. High mobility group box 1 (HMGB1) is critically required for cellular damage and apoptosis as an important endogenous danger signal. Recently, Clara cell 16KDa protein (CC16) has been identified to exert anti-inflammatory and immunomodulatory influence in various injury-related diseases model. However, little is known about its ability to protect against airway epithelial injury in allergic asthma. This study was aimed to clarify the protective roles of CC16 on airway epithelia in HDM-induced asthma and the regulation of HMGB1 by CC16. Methods Mice were sensitized and challenged by HDM extract and administrated intranasally with CC16 (5 μg/g or 10 μg/g) or saline in the challenged period. The BEAS-2B human airway epithelial cell line were cultured with CC16 or the control vehicle and then exposed to HDM. Knockdown or overexpression of HMGB1 was induced by cell transfection or intratracheal injection of recombinant adenovirus. Results CC16 treatment decreased airway inflammation and histological damage of airway epithelium dose-dependently in HDM-induced asthma model. Airway epithelia apoptosis upon HDM stimulation was noticeably abrogated by CC16 in vivo and in vitro. In addition, upregulation of HMGB1 expression and its related signaling were also detected under HDM conditions, while silencing HMGB1 significantly inhibited the apoptosis of BEAS-2B cells. Furthermore, the activity of HMGB1-mediated signaling was restrained after CC16 treatment whereas HMGB1 overexpression abolished the protective effect of CC16 on HDM-induced airway epithelia apoptosis. Conclusions Our data confirm that CC16 attenuates HDM-mediated airway inflammation and damage via suppressing airway epithelial cell apoptosis in a HMGB1-dependent manner, suggesting the role of CC16 as a potential protective option for HDM-induced asthma.
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Affiliation(s)
- Meixuan Liu
- Shanghai East Clinical Medical College, Nanjing Medical University, Shanghai, 200123, China.,Department of Respiratory Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200123, China
| | - Jingjing Lu
- Department of Respiratory Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200123, China
| | - Qian Zhang
- Shanghai East Clinical Medical College, Nanjing Medical University, Shanghai, 200123, China.,Department of Respiratory Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200123, China
| | - Yunxuan Zhang
- Department of Pharmacy, Huadong Hospital, Fudan University, Shanghai, 200040, China
| | - Zhongliang Guo
- Shanghai East Clinical Medical College, Nanjing Medical University, Shanghai, 200123, China. .,Department of Respiratory Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200123, China.
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27
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Royer DJ, Cook DN. Regulation of Immune Responses by Nonhematopoietic Cells in Asthma. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2021; 206:292-301. [PMID: 33397743 PMCID: PMC8581969 DOI: 10.4049/jimmunol.2000885] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 09/28/2020] [Indexed: 12/11/2022]
Abstract
Nonhematopoietic cells are emerging as important contributors to many inflammatory diseases, including allergic asthma. Recent advances have led to a deeper understanding of how these cells interact with traditional immune cells, thereby modulating their activities in both homeostasis and disease. In addition to their well-established roles in gas exchange and barrier function, lung epithelial cells express an armament of innate sensors that can be triggered by various inhaled environmental agents, leading to the production of proinflammatory molecules. Advances in cell lineage tracing and single-cell RNA sequencing have expanded our knowledge of rare, but immunologically important nonhematopoietic cell populations. In parallel with these advances, novel reverse genetic approaches are revealing how individual genes in different lung-resident nonhematopoietic cell populations contribute to the initiation and maintenance of asthma. This knowledge is already revealing new pathways that can be selectively targeted to treat distinct forms of asthma.
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Affiliation(s)
- Derek J Royer
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709
| | - Donald N Cook
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709
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28
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Abu Khweek A, Kim E, Joldrichsen MR, Amer AO, Boyaka PN. Insights Into Mucosal Innate Immune Responses in House Dust Mite-Mediated Allergic Asthma. Front Immunol 2020; 11:534501. [PMID: 33424827 PMCID: PMC7793902 DOI: 10.3389/fimmu.2020.534501] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 09/01/2020] [Indexed: 01/09/2023] Open
Abstract
The prevalence of asthma has been rising steadily for several decades, and continues to be a major public health and global economic burden due to both direct and indirect costs. Asthma is defined as chronic heterogeneous inflammatory diseases characterized by airway obstruction, mucus production and bronchospasm. Different endotypes of asthma are being recognized based on the distinct pathophysiology, genetic predisposition, age, prognosis, and response to remedies. Mucosal innate response to environmental triggers such as pollen, cigarette smoke, fragrances, viral infection, and house dust mite (HDM) are now recognized to play an important role in allergic asthma. HDM are the most pervasive allergens that co-habitat with us, as they are ubiquitous in-house dusts, mattress and bedsheets, and feed on a diet of exfoliated human skin flakes. Dermatophagoides pteronyssinus, is one among several HDM identified up to date. During the last decade, extensive studies have been fundamental in elucidating the interactions between HDM allergens, the host immune systems and airways. Moreover, the paradigm in the field of HDM-mediated allergy has been shifted away from being solely a Th2-geared to a complex response orchestrated via extensive crosstalk between the epithelium, professional antigen presenting cells (APCs) and components of the adaptive immunity. In fact, HDM have several lessons to teach us about their allergenicity, the complex interactions that stimulate innate immunity in initiating and perpetuating the lung inflammation. Herein, we review main allergens of Dermatophagoides pteronyssinus and their interactions with immunological sentinels that promote allergic sensitization and activation of innate immunity, which is critical for the development of the Th2 biased adaptive immunity to HDM allergens and development of allergic asthma.
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Affiliation(s)
- Arwa Abu Khweek
- Department of Biology and Biochemistry, Birzeit University, Birzeit, Palestine.,Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, United States.,Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, United States
| | - Eunsoo Kim
- Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, United States
| | - Marisa R Joldrichsen
- Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, United States
| | - Amal O Amer
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, United States.,The Infectious Diseases Institute, The Ohio State University, Columbus, OH, United States
| | - Prosper N Boyaka
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, United States.,Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, United States.,The Infectious Diseases Institute, The Ohio State University, Columbus, OH, United States
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Cappelletti M, Doll JR, Stankiewicz TE, Lawson MJ, Sauer V, Wen B, Kalinichenko VV, Sun X, Tilburgs T, Divanovic S. Maternal regulation of inflammatory cues is required for induction of preterm birth. JCI Insight 2020; 5:138812. [PMID: 33208552 PMCID: PMC7710297 DOI: 10.1172/jci.insight.138812] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 10/07/2020] [Indexed: 12/14/2022] Open
Abstract
Infection-driven inflammation in pregnancy is a major cause of spontaneous preterm birth (PTB). Both systemic infection and bacterial ascension through the vagina/cervix to the amniotic cavity are strongly associated with PTB. However, the contribution of maternal or fetal inflammatory responses in the context of systemic or localized models of infection-driven PTB is not well defined. Here, using intraperitoneal or intraamniotic LPS challenge, we examined the necessity and sufficiency of maternal and fetal Toll-like receptor (TLR) 4 signaling in induction of inflammatory vigor and PTB. Both systemic and local LPS challenge promoted induction of inflammatory pathways in uteroplacental tissues and induced PTB. Restriction of TLR4 expression to the maternal compartment was sufficient for induction of LPS-driven PTB in either systemic or intraamniotic challenge models. In contrast, restriction of TLR4 expression to the fetal compartment failed to induce LPS-driven PTB. Vav1-Cre-mediated genetic deletion of TLR4 suggested a critical role for maternal immune cells in inflammation-driven PTB. Further, passive transfer of WT in vitro-derived macrophages and dendritic cells to TLR4-null gravid females was sufficient to induce an inflammatory response and drive PTB. Cumulatively, these findings highlight the critical role for maternal regulation of inflammatory cues in induction of inflammation-driven parturition.
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Affiliation(s)
- Monica Cappelletti
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
| | - Jessica R. Doll
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
| | - Traci E. Stankiewicz
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
| | - Matthew J. Lawson
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
| | - Vivien Sauer
- Medical Scientist Training Program, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Bingqiang Wen
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
- Center for Lung Regenerative Medicine
| | - Vladimir V. Kalinichenko
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
- Center for Lung Regenerative Medicine
| | | | - Tamara Tilburgs
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
- Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
| | - Senad Divanovic
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
- Medical Scientist Training Program, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
- Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
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30
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Komalla V, Allam VSRR, Kwok PCL, Sheikholeslami B, Owen L, Jaffe A, Waters SA, Mohammad S, Oliver BG, Chen H, Haghi M. A phospholipid-based formulation for the treatment of airway inflammation in chronic respiratory diseases. Eur J Pharm Biopharm 2020; 157:47-58. [PMID: 33065219 DOI: 10.1016/j.ejpb.2020.09.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 09/06/2020] [Accepted: 09/26/2020] [Indexed: 12/20/2022]
Abstract
Inflammation, the major hallmark of all chronic respiratory diseases is generally managed by inhaled corticosteroids. However, long term high dose treatment can result in significant side effects. Hence, there is a medical need for non-steroidal anti-inflammatory therapies to address airway inflammation. Phospholipids have been shown to reduce inflammation in several inflammatory conditions; however, their clinical translation has been limited to liposomal formulations traditionally used as drug carriers and their biological activity has not been investigated. Here we report the first application of empty liposomes as an anti-inflammatory treatment in airway inflammation. In the current study, liposomes (UTS-001) were prepared from cholesterol and a synthetic phospholipid (DOPC). The formulation was characterised in terms of size, charge, polydispersity index, morphology and stability as colloidal suspension and freeze-dried nanoparticles. Time-dependant uptake of UTS-001 in airway epithelial cells was observed which was inhibited by nystatin demonstrating that the uptake is via the caveolae pathway. In-vitro, in primary nasal epithelial cells, UTS-001 treatment successfully attenuated IL-6 levels following TNF-α stimulation. Consistent with the in-vitro findings, in-vivo, in the ovalbumin model of allergic airway inflammation, UTS-001 significantly reduced total immune cell counts in bronchoalveolar lavage fluid and reduced airway hyperresponsiveness in response to increasing doses of methacholine challenge. Therefore, our results establish UTS-001 as a potential anti-inflammatory treatment that may be useful as a therapeutic for lung inflammatory diseases.
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Affiliation(s)
- Varsha Komalla
- Graduate School of Health, University of Technology Sydney, Chippendale, NSW 2008, Australia; Woolcock Institute of Medical Research, The University of Sydney, Glebe, NSW 2037, Australia
| | - Venkata Sita Rama Raju Allam
- Graduate School of Health, University of Technology Sydney, Chippendale, NSW 2008, Australia; Woolcock Institute of Medical Research, The University of Sydney, Glebe, NSW 2037, Australia
| | - Philip Chi Lip Kwok
- Sydney Pharmacy School, Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW 2006, Australia
| | - Behjat Sheikholeslami
- Graduate School of Health, University of Technology Sydney, Chippendale, NSW 2008, Australia
| | - Louisa Owen
- School of Women's and Children's Health, Faculty of Medicine, The University of New South Wales, Kensington, NSW 2052, Australia; Molecular and Integrative Cystic Fibrosis Research Centre (miCF_RC), School of Medical Sciences, Faculty of Medicine, The University of New South Wales, Sydney, NSW, Australia; Department of Respiratory Medicine, Sydney Children's Hospital, Sydney, NSW, Australia
| | - Adam Jaffe
- School of Women's and Children's Health, Faculty of Medicine, The University of New South Wales, Kensington, NSW 2052, Australia; Molecular and Integrative Cystic Fibrosis Research Centre (miCF_RC), School of Medical Sciences, Faculty of Medicine, The University of New South Wales, Sydney, NSW, Australia; Department of Respiratory Medicine, Sydney Children's Hospital, Sydney, NSW, Australia
| | - Shafagh A Waters
- School of Women's and Children's Health, Faculty of Medicine, The University of New South Wales, Kensington, NSW 2052, Australia; Molecular and Integrative Cystic Fibrosis Research Centre (miCF_RC), School of Medical Sciences, Faculty of Medicine, The University of New South Wales, Sydney, NSW, Australia; Department of Respiratory Medicine, Sydney Children's Hospital, Sydney, NSW, Australia
| | - Shiva Mohammad
- School of Life Sciences, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Brian Gregory Oliver
- Woolcock Institute of Medical Research, The University of Sydney, Glebe, NSW 2037, Australia; School of Life Sciences, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Hui Chen
- School of Life Sciences, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Mehra Haghi
- Graduate School of Health, University of Technology Sydney, Chippendale, NSW 2008, Australia.
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31
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Wu SE, Hashimoto-Hill S, Woo V, Eshleman EM, Whitt J, Engleman L, Karns R, Denson LA, Haslam DB, Alenghat T. Microbiota-derived metabolite promotes HDAC3 activity in the gut. Nature 2020; 586:108-112. [PMID: 32731255 PMCID: PMC7529926 DOI: 10.1038/s41586-020-2604-2] [Citation(s) in RCA: 121] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 06/04/2020] [Indexed: 12/21/2022]
Abstract
The coevolution of mammalian hosts and their beneficial commensal microbes has led to development of symbiotic host-microbiota relationships1. Epigenetic machinery permits mammalian cells to integrate environmental signals2; however, how these pathways are fine-tuned by diverse cues from commensal bacteria is not well understood. Here we reveal a highly selective pathway through which microbiota-derived inositol phosphate regulates histone deacetylase 3 (HDAC3) activity in the intestine. Despite the abundant presence of HDAC inhibitors such as butyrate in the intestine, we found that HDAC3 activity was sharply increased in intestinal epithelial cells of microbiota-replete mice compared with germ-free mice. This divergence was reconciled by the finding that commensal bacteria, including Escherichia coli, stimulated HDAC activity through metabolism of phytate and production of inositol-1,4,5-trisphosphate (InsP3). Both intestinal exposure to InsP3 and phytate ingestion promoted recovery following intestinal damage. Of note, InsP3 also induced growth of intestinal organoids derived from human tissue, stimulated HDAC3-dependent proliferation and countered butyrate inhibition of colonic growth. Collectively, these results show that InsP3 is a microbiota-derived metabolite that activates a mammalian histone deacetylase to promote epithelial repair. Thus, HDAC3 represents a convergent epigenetic sensor of distinct metabolites that calibrates host responses to diverse microbial signals.
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Affiliation(s)
- Shu-En Wu
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Seika Hashimoto-Hill
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Vivienne Woo
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Emily M Eshleman
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Jordan Whitt
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Laura Engleman
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Rebekah Karns
- Division of Gastroenterology, Hepatology, and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Lee A Denson
- Division of Gastroenterology, Hepatology, and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - David B Haslam
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
- Division of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Theresa Alenghat
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
- Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
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32
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Deng W, Yuan J, Cha J, Sun X, Bartos A, Yagita H, Hirota Y, Dey SK. Endothelial Cells in the Decidual Bed Are Potential Therapeutic Targets for Preterm Birth Prevention. Cell Rep 2020; 27:1755-1768.e4. [PMID: 31067461 DOI: 10.1016/j.celrep.2019.04.049] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 03/18/2019] [Accepted: 04/10/2019] [Indexed: 12/13/2022] Open
Abstract
Preterm birth (PTB) is a syndrome with many origins. Among them, infection or inflammation are major risk factors for PTB; however, local defense mechanisms to mount anti-inflammatory responses against inflammation-induced PTB are poorly understood. Here, we show that endothelial TLR4 in the decidual bed is critical for sensing inflammation during pregnancy because mice with endothelial Tlr4 deletion are resistant to lipopolysaccharide (LPS)-induced PTB. Under inflammatory conditions, IL-6 is readily expressed in decidual endothelial cells with signal transducer and activator of transcription 3 (Stat3) phosphorylation in perivascular stromal cells, which then regulates expression of anti-inflammatory IL-10. Our observation that administration of an IL-10 neutralizing antibody predisposing mice to PTB shows IL-10's anti-inflammatory role to prevent PTB. We show that the integration of endothelial and perivascular stromal signaling can determine pregnancy outcomes. These findings highlight a role for endothelial TLR4 in inflammation-induced PTB and may offer a potential therapeutic target to prevent PTB.
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Affiliation(s)
- Wenbo Deng
- Division of Reproductive Sciences, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45299, USA; College of Medicine, University of Cincinnati, Cincinnati, OH 45221, USA
| | - Jia Yuan
- Division of Reproductive Sciences, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45299, USA; College of Medicine, University of Cincinnati, Cincinnati, OH 45221, USA
| | - Jeeyeon Cha
- Division of Diabetes, Endocrinology, and Metabolism, Department of Internal Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Xiaofei Sun
- Division of Reproductive Sciences, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45299, USA; College of Medicine, University of Cincinnati, Cincinnati, OH 45221, USA
| | - Amanda Bartos
- Division of Reproductive Sciences, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45299, USA; College of Medicine, University of Cincinnati, Cincinnati, OH 45221, USA
| | - Hideo Yagita
- Department of Immunology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan
| | - Yasushi Hirota
- Department of Obstetrics and Gynecology, University of Tokyo, Japan
| | - Sudhansu K Dey
- Division of Reproductive Sciences, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45299, USA; College of Medicine, University of Cincinnati, Cincinnati, OH 45221, USA.
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33
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Abstract
PURPOSE OF REVIEW This review summarizes recent progress in our understanding how environmental adjuvants promote the development of asthma. RECENT FINDINGS Asthma is a heterogeneous set of lung pathologies with overlapping features. Human studies and animal models suggest that exposure to different environmental adjuvants activate distinct immune pathways, which in turn give rise to distinct forms, or endotypes, of allergic asthma. Depending on their concentrations, inhaled TLR ligands can activate either type 2 inflammation, or Th17 differentiation, along with regulatory responses that function to attenuate inflammation. By contrast, a different category of environmental adjuvants, proteases, activate distinct immune pathways and prime predominantly type 2 immune responses. Asthma is not a single disease, but rather a group of pathologies with overlapping features. Different endotypes of asthma likely arise from perturbations of distinct immunologic pathways during allergic sensitization.
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Affiliation(s)
- Donald N Cook
- Immunogenetics Group, Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, 111 T.W. Alexander Dr., Research Triangle Park, Durham, NC, 27709, USA.
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34
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Darwesh MAS, Abd Alhaleem IS, Al-Obaidy MWS. The Correlation Between Asthma Severity and Neutrophil to Lymphocyte Ratio. EUROPEAN JOURNAL OF MEDICAL AND HEALTH SCIENCES 2020; 2. [DOI: 10.24018/ejmed.2020.2.2.67] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Background—The prognosis is essential in management and follows up of asthmatic patients. Neutrophil to lymphocyte ratio is considered as the common prognostic marker for many diseases especially the asthma.
Aim of study—To assess the relationship between asthma severity and neutrophil to lymphocyte ratio in comparison to healthy controls.
Patients and methods—This study is a cross sectional study conducted in Respiratory Consultancy Clinic in Baghdad Teaching Hospital in Medical City during the period from 1st of October, 2018 to 31st of March, 2019 on sample of 50 asthmatic patients and 50 healthy controls. The diagnosis of asthma was confirmed by the supervisor through clinical symptoms, signs, spirometery with reversibility test (according to GINA guideline.).
Results—A highly significant difference was observed between asthmatic cases and controls regarding age (p<0.001). A significant association was observed between obesity and asthmatic cases (p=0.001). There was a highly significant association between high neutrophil/lymphocyte ratio and asthmatic cases (p<0.001). The neutrophil/lymphocyte ratio was significantly increased with advanced age, females, severe and uncontrolled asthma.
Conclusions—The neutrophil to lymphocyte ratio is useful biomarker in assessment of asthma severity.
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35
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Kim DH, Gu A, Lee JS, Yang EJ, Kashif A, Hong MH, Kim G, Park BS, Lee SJ, Kim IS. Suppressive effects of S100A8 and S100A9 on neutrophil apoptosis by cytokine release of human bronchial epithelial cells in asthma. Int J Med Sci 2020; 17:498-509. [PMID: 32174780 PMCID: PMC7053304 DOI: 10.7150/ijms.37833] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Accepted: 09/05/2019] [Indexed: 12/28/2022] Open
Abstract
S100A8 and S100A9 are important proteins in the pathogenesis of allergy. Asthma is an allergic lung disease, characterized by bronchial inflammation due to leukocytes, bronchoconstriction, and allergen-specific IgE. In this study, we examined the role of S100A8 and S100A9 in the interaction of cytokine release from bronchial epithelial cells, with constitutive apoptosis of neutrophils. S100A8 and S100A9 induce increased secretion of neutrophil survival cytokines such as MCP-1, IL-6 and IL-8. This secretion is suppressed by TLR4 inhibitor), LY294002, AKT inhibitor, PD98059, SB202190, SP600125, and BAY-11-7085. S100A8 and S100A9 also induce the phosphorylation of AKT, ERK, p38 MAPK and JNK, and activation of NF-κB, which were blocked after exposure to TLR4i, LY294002, AKTi, PD98059, SB202190 or SP600125. Furthermore, supernatants collected from bronchial epithelial cells after S100A8 and S100A9 stimulation suppressed the apoptosis of normal and asthmatic neutrophils. These inhibitory mechanisms are involved in suppression of caspase 9 and caspase 3 activation, and BAX expression. The degradation of MCL-1 and BCL-2 was also blocked by S100A8 and S100A9 stimulation. Essentially, neutrophil apoptosis was blocked by co-culture of normal and asthmatic neutrophils with BEAS-2B cells in the presence of S100A8 and S100A9. These findings will enable elucidation of asthma pathogenesis.
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Affiliation(s)
- Da Hye Kim
- Department of Senior Healthcare, BK21 Plus Program, Graduate School, Eulji University, Daejeon 34824
| | - Ayoung Gu
- Department of Senior Healthcare, BK21 Plus Program, Graduate School, Eulji University, Daejeon 34824
| | - Ji-Sook Lee
- Department of Clinical Laboratory Science, Wonkwang Health Science University, Iksan, 54538
| | - Eun Ju Yang
- Department of Clinical Laboratory Science, Daegu Haany University, Gyeongsan, 38610
| | - Ayesha Kashif
- Department of Senior Healthcare, BK21 Plus Program, Graduate School, Eulji University, Daejeon 34824
| | - Min Hwa Hong
- Department of Senior Healthcare, BK21 Plus Program, Graduate School, Eulji University, Daejeon 34824
| | - Geunyeong Kim
- Department of Senior Healthcare, BK21 Plus Program, Graduate School, Eulji University, Daejeon 34824
| | - Beom Seok Park
- Department of Senior Healthcare, BK21 Plus Program, Graduate School, Eulji University, Daejeon 34824.,Department of Biomedical Laboratory Science, College of Health Science, Eulji University, Seongnam 13135
| | - Soo Jin Lee
- Department of Pediatrics, School of Medicine, Eulji University, Daejeon, 301-746
| | - In Sik Kim
- Department of Senior Healthcare, BK21 Plus Program, Graduate School, Eulji University, Daejeon 34824.,Department of Biomedical Laboratory Science, School of Medicine, Eulji University, Daejeon 34824, Republic of Korea
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36
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Jacquet A, Robinson C. Proteolytic, lipidergic and polysaccharide molecular recognition shape innate responses to house dust mite allergens. Allergy 2020; 75:33-53. [PMID: 31166610 DOI: 10.1111/all.13940] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 04/05/2019] [Accepted: 05/23/2019] [Indexed: 02/06/2023]
Abstract
House dust mites (HDMs) are sources of an extensive repertoire of allergens responsible for a range of allergic conditions. Technological advances have accelerated the identification of these allergens and characterized their putative roles within HDMs. Understanding their functional bioactivities is illuminating how they interact with the immune system to cause disease and how interrelations between them are essential to maximize allergic responses. Two types of allergen bioactivity, namely proteolysis and peptidolipid/lipid binding, elicit IgE and stimulate bystander responses to unrelated allergens. Much of this influence arises from Toll-like receptor (TLR) 4 or TLR2 signalling and, in the case of protease allergens, the activation of additional pleiotropic effectors with strong disease linkage. Of related interest is the interaction of HDM allergens with common components of the house dust matrix, through either their binding to allergens or their autonomous modulation of immune receptors. Herein, we provide a contemporary view of how proteolysis, lipid-binding activity and interactions with polysaccharides and polysaccharide molecular recognition systems coordinate the principal responses which underlie allergy. The power of the catalytically competent group 1 HDM protease allergen component is demonstrated by a review of disclosures surrounding the efficacy of novel inhibitors produced by structure-based design.
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Affiliation(s)
- Alain Jacquet
- Center of Excellence in Vaccine Research and Development (Chula Vaccine Research Center-Chula VRC) Chulalongkorn University Bangkok Thailand
| | - Clive Robinson
- Institute for Infection and Immunity St George's, University of London London UK
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37
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Mitsui K, Ikedo T, Kamio Y, Furukawa H, Lawton MT, Hashimoto T. TLR4 (Toll-Like Receptor 4) Mediates the Development of Intracranial Aneurysm Rupture. Hypertension 2019; 75:468-476. [PMID: 31865791 DOI: 10.1161/hypertensionaha.118.12595] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Inflammation is emerging as a critical factor in the pathophysiology of intracranial aneurysm. TLR4 (toll-like receptor 4) contributes not only to the innate immune responses but also to the inflammatory processes associated with vascular disease. Therefore, we examined the contribution of the TLR4 pathway to the development of the rupture of intracranial aneurysm. We used a mouse model of intracranial aneurysm. TLR4 inhibition significantly reduced the development of aneurysmal rupture. In addition, the rupture rate and levels of proinflammatory cytokines were lower in TLR4 knockout mice than the control littermates. Macrophage/monocyte-specific TLR4 knockout mice had a lower rupture rate than the control littermate mice. Moreover, the deficiency of MyD88 (myeloid differentiation primary-response protein 88), a key mediator of TLR4, reduced the rupture rate. These findings suggest that the TLR4 pathway promotes the development of intracranial aneurysmal rupture by accelerating inflammation in aneurysmal walls. Inhibition of the TLR4 pathway in inflammatory cells may be a promising approach for the prevention of aneurysmal rupture and subsequent subarachnoid hemorrhage.
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Affiliation(s)
- Kazuha Mitsui
- From the Department of Neurosurgery and Neurobiology, Barrow Aneurysm and AVM Research Center, Barrow Neurological Institute, Phoenix, AZ
| | - Taichi Ikedo
- From the Department of Neurosurgery and Neurobiology, Barrow Aneurysm and AVM Research Center, Barrow Neurological Institute, Phoenix, AZ
| | - Yoshinobu Kamio
- From the Department of Neurosurgery and Neurobiology, Barrow Aneurysm and AVM Research Center, Barrow Neurological Institute, Phoenix, AZ
| | - Hajime Furukawa
- From the Department of Neurosurgery and Neurobiology, Barrow Aneurysm and AVM Research Center, Barrow Neurological Institute, Phoenix, AZ
| | - Michael T Lawton
- From the Department of Neurosurgery and Neurobiology, Barrow Aneurysm and AVM Research Center, Barrow Neurological Institute, Phoenix, AZ
| | - Tomoki Hashimoto
- From the Department of Neurosurgery and Neurobiology, Barrow Aneurysm and AVM Research Center, Barrow Neurological Institute, Phoenix, AZ
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38
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Erickson SL, Alston L, Nieves K, Chang TKH, Mani S, Flannigan KL, Hirota SA. The xenobiotic sensing pregnane X receptor regulates tissue damage and inflammation triggered by C difficile toxins. FASEB J 2019; 34:2198-2212. [PMID: 31907988 PMCID: PMC7027580 DOI: 10.1096/fj.201902083rr] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 11/18/2019] [Accepted: 11/20/2019] [Indexed: 12/14/2022]
Abstract
Clostridioides difficile (formerly Clostridium difficile; C difficile), the leading cause of nosocomial antibiotic‐associated colitis and diarrhea in the industrialized world, triggers colonic disease through the release two toxins, toxin A (TcdA) and toxin B (TcdB), glucosyltransferases that modulate monomeric G‐protein function and alter cytoskeletal function. The initial degree of the host immune response to C difficile and its pathogenic toxins is a common indicator of disease severity and infection recurrence. Thus, targeting the intestinal inflammatory response during infection could significantly decrease disease morbidity and mortality. In the current study, we sought to interrogate the influence of the pregnane X receptor (PXR), a modulator of xenobiotic and detoxification responses, which can sense and respond to microbial metabolites and modulates inflammatory activity, during exposure to TcdA and TcdB. Following intrarectal exposure to TcdA/B, PXR‐deficient mice (Nr1i2−/−) exhibited reduced survival, an effect that was associated with increased levels of innate immune cell influx. This exacerbated response was associated with a twofold increase in the expression of Tlr4. Furthermore, while broad‐spectrum antibiotic treatment (to deplete the intestinal microbiota) did not alter the responses in Nr1i2−/− mice, blocking TLR4 signaling significantly reduced TcdA/B‐induced disease severity and immune responses in these mice. Lastly, to assess the therapeutic potential of targeting the PXR, we activated the PXR with pregnenolone 16α‐carbonitrile (PCN) in wild‐type mice, which greatly reduced the severity of TcdA/B‐induced damage and intestinal inflammation. Taken together, these data suggest that the PXR plays a role in the host's response to TcdA/B and may provide a novel target to dampen the inflammatory tissue damage in C difficile infections.
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Affiliation(s)
- Sarah L Erickson
- Department of Physiology & Pharmacology, University of Calgary, Calgary, AB, Canada
| | - Laurie Alston
- Department of Physiology & Pharmacology, University of Calgary, Calgary, AB, Canada
| | - Kristoff Nieves
- Department of Physiology & Pharmacology, University of Calgary, Calgary, AB, Canada
| | - Thomas K H Chang
- Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Sridhar Mani
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Kyle L Flannigan
- Department of Physiology & Pharmacology, University of Calgary, Calgary, AB, Canada
| | - Simon A Hirota
- Department of Physiology & Pharmacology, University of Calgary, Calgary, AB, Canada.,Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB, Canada
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39
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She L, Alanazi HH, Yan L, Zou Y, Sun Y, Dube PH, Brooks EG, Barrera GD, Lai Z, Chen Y, Liu Y, Zhang X, Li XD. Immune Sensing of Aeroallergen-Associated Double-Stranded RNA Triggers an IFN Response and Modulates Type 2 Lung Inflammation. THE JOURNAL OF IMMUNOLOGY 2019; 203:2520-2531. [PMID: 31562213 DOI: 10.4049/jimmunol.1900720] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 08/26/2019] [Indexed: 01/10/2023]
Abstract
The innate immune sensing of allergens or allergen-associated components regulate the development of type 2 inflammatory responses. However, the underlying molecular basis by which allergens or allergen-associated components are detected by innate immune receptors remains elusive. In this study, we report that the most common aeroallergen, house dust mite (HDM), harbors a dsRNA species (HDM-dsRNA) that can activate TLR3-mediated IFN responses and counteract the development of an uncontrolled type 2 immune response. We demonstrate that the mouse strains defective in the dsRNA-sensing pathways show aggravated type 2 inflammation defined by severe eosinophilia, elevated level of type 2 cytokines, and mucus overproduction in a model of allergic lung inflammation. The inability to sense HDM-dsRNA resulted in significant increases in airway hyperreactivity. We further show that the administration of the purified HDM-dsRNA at a low dose is sufficient to induce an immune response to prevent the onset of a severe type 2 lung inflammation. Collectively, these results unveil a new role for the HDM-dsRNA/TLR3-signaling axis in the modulation of a type 2 lung inflammation in mice.
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Affiliation(s)
- Li She
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health San Antonio, San Antonio, TX 78229.,Department of Otolaryngology, Head and Neck Surgery, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Hamad H Alanazi
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health San Antonio, San Antonio, TX 78229
| | - Liping Yan
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health San Antonio, San Antonio, TX 78229
| | - Yi Zou
- Greehey Children's Cancer Research Institute, University of Texas Health San Antonio, San Antonio, TX 78229; and
| | - Yilun Sun
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health San Antonio, San Antonio, TX 78229
| | - Peter H Dube
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health San Antonio, San Antonio, TX 78229
| | - Edward G Brooks
- Division of Immunology and Infectious Disease, Long School of Medicine, University of Texas Health San Antonio, San Antonio, TX 78229
| | - Gema D Barrera
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health San Antonio, San Antonio, TX 78229
| | - Zhao Lai
- Greehey Children's Cancer Research Institute, University of Texas Health San Antonio, San Antonio, TX 78229; and
| | - Yidong Chen
- Greehey Children's Cancer Research Institute, University of Texas Health San Antonio, San Antonio, TX 78229; and
| | - Yong Liu
- Department of Otolaryngology, Head and Neck Surgery, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Xin Zhang
- Department of Otolaryngology, Head and Neck Surgery, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Xiao-Dong Li
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health San Antonio, San Antonio, TX 78229;
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40
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Fulham MA, Ratna A, Gerstein RM, Kurt-Jones EA, Mandrekar P. Alcohol-induced adipose tissue macrophage phenotypic switching is independent of myeloid Toll-like receptor 4 expression. Am J Physiol Cell Physiol 2019; 317:C687-C700. [PMID: 31268779 DOI: 10.1152/ajpcell.00276.2017] [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: 12/26/2022]
Abstract
Alcoholic liver disease results from a combination of immune and metabolic pathogenic events. In addition to liver injury, chronic alcohol consumption also causes adipose tissue inflammation. The specific immune mechanisms that drive this process are unknown. Here, we sought to determine the role of the innate immune receptor Toll-like receptor 4 (TLR4) in alcohol-induced adipose tissue inflammation. Using a model of chronic, multiple-binge alcohol exposure, we showed that alcohol-mediated accumulation of proinflammatory adipose tissue macrophages was absent in global TLR4 knockout mice. Proinflammatory macrophage accumulation did not depend on macrophage TLR4 expression; LysMCre-driven deletion of Tlr4 from myeloid cells did not affect circulating endotoxin or the accumulation of M1 macrophages in adipose tissue following alcohol exposure. Proinflammatory cytokine/chemokine production in the adipose stromal vascular fraction also occurred independently of TLR4. Finally, the levels of other adipose immune cells, such as dendritic cells, neutrophils, B cells, and T cells, were modulated by chronic, multiple-binge alcohol and the presence of TLR4. Together, these data indicate that TLR4 expression on cells, other than myeloid cells, is important for the alcohol-induced increase in proinflammatory adipose tissue macrophages.
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Affiliation(s)
- Melissa A Fulham
- Graduate School of Biomedical Sciences, University of Massachusetts Medical School, Worcester, Massachusetts.,Division of Gastroenterology, Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Anuradha Ratna
- Division of Gastroenterology, Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Rachel M Gerstein
- Program in Innate Immunity, University of Massachusetts Medical School, Worcester, Massachusetts.,Department of Microbiology and Physiological Systems, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Evelyn A Kurt-Jones
- Program in Innate Immunity, University of Massachusetts Medical School, Worcester, Massachusetts.,Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Pranoti Mandrekar
- Graduate School of Biomedical Sciences, University of Massachusetts Medical School, Worcester, Massachusetts.,Division of Gastroenterology, Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts.,Program in Innate Immunity, University of Massachusetts Medical School, Worcester, Massachusetts
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41
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Abstract
Asthma is a genetically and phenotypically complex disease that has a major impact on global health. Signs and symptoms of asthma are caused by the obstruction of airflow through the airways. The epithelium that lines the airways plays a major role in maintaining airway patency and in host defense. The epithelium initiates responses to inhaled or aspirated substances, including allergens, viruses, and bacteria, and epithelial-derived cytokines are important in the recruitment and activation of immune cells in the airway. Changes in the structure and function of the airway epithelium are a prominent feature of asthma. Approximately half of individuals with asthma have evidence of active type 2 immune responses in the airway. In these individuals, epithelial cytokines promote type 2 responses, and responses to type 2 cytokines result in increased epithelial mucus production and other effects that cause airway obstruction. Recent work also implicates other epithelial responses, including interleukin-17, interferon and ER stress responses, that may contribute to asthma pathogenesis and provide new targets for therapy.
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Affiliation(s)
- Luke R Bonser
- Lung Biology Center, University of California San Francisco, San Francisco, CA, United States
| | - David J Erle
- Lung Biology Center, University of California San Francisco, San Francisco, CA, United States.
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42
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Gour N, Lajoie S, Smole U, White M, Hu D, Goddard P, Huntsman S, Eng C, Mak A, Oh S, Kim JH, Sharma A, Plante S, Salem IH, Resch Y, Xiao X, Yao N, Singh A, Vrtala S, Chakir J, Burchard EG, Lane AP, Wills-Karp M. Dysregulated invertebrate tropomyosin-dectin-1 interaction confers susceptibility to allergic diseases. Sci Immunol 2018; 3:3/20/eaam9841. [PMID: 29475849 DOI: 10.1126/sciimmunol.aam9841] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 07/25/2017] [Accepted: 12/14/2017] [Indexed: 12/11/2022]
Abstract
The key factors underlying the development of allergic diseases-the propensity for a minority of individuals to develop dysfunctional responses to harmless environmental molecules-remain undefined. We report a pathway of immune counter-regulation that suppresses the development of aeroallergy and shrimp-induced anaphylaxis. In mice, signaling through epithelially expressed dectin-1 suppresses the development of type 2 immune responses through inhibition of interleukin-33 (IL-33) secretion and the subsequent recruitment of IL-13-producing innate lymphoid cells. Although this homeostatic pathway is functional in respiratory epithelial cells from healthy humans, it is dramatically impaired in epithelial cells from asthmatic and chronic rhinosinusitis patients, resulting in elevated IL-33 production. Moreover, we identify an association between a single-nucleotide polymorphism (SNP) in the dectin-1 gene loci and reduced pulmonary function in two cohorts of asthmatics. This intronic SNP is a predicted eQTL (expression quantitative trait locus) that is associated with reduced dectin-1 expression in human tissue. We identify invertebrate tropomyosin, a ubiquitous arthropod-derived molecule, as an immunobiologically relevant dectin-1 ligand that normally serves to restrain IL-33 release and dampen type 2 immunity in healthy individuals. However, invertebrate tropomyosin presented in the context of impaired dectin-1 function, as observed in allergic individuals, leads to unrestrained IL-33 secretion and skewing of immune responses toward type 2 immunity. Collectively, we uncover a previously unrecognized mechanism of protection against allergy to a conserved recognition element omnipresent in our environment.
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Affiliation(s)
- Naina Gour
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA.,Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA.,The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Stephane Lajoie
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA.
| | - Ursula Smole
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
| | - Marquitta White
- Department of Medicine and Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Donglei Hu
- Department of Medicine and Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Pagé Goddard
- Department of Medicine and Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Scott Huntsman
- Department of Medicine and Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Celeste Eng
- Department of Medicine and Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Angel Mak
- Department of Medicine and Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Sam Oh
- Department of Medicine and Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Jung-Hyun Kim
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
| | - Annu Sharma
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
| | - Sophie Plante
- Centre de Recherche, Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, Québec, Canada
| | - Ikhlass Haj Salem
- Centre de Recherche, Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, Québec, Canada
| | - Yvonne Resch
- Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Xiao Xiao
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
| | - Nu Yao
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
| | - Anju Singh
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
| | - Susanne Vrtala
- Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Jamila Chakir
- Centre de Recherche, Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, Québec, Canada
| | - Esteban G Burchard
- Department of Medicine and Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Andrew P Lane
- Division of Rhinology and Sinus Surgery, Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA
| | - Marsha Wills-Karp
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA.
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43
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Zhang J, Chen J, Robinson C. Cellular and Molecular Events in the Airway Epithelium Defining the Interaction Between House Dust Mite Group 1 Allergens and Innate Defences. Int J Mol Sci 2018; 19:E3549. [PMID: 30423826 PMCID: PMC6274810 DOI: 10.3390/ijms19113549] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 10/30/2018] [Accepted: 11/07/2018] [Indexed: 12/26/2022] Open
Abstract
Serodominant group 1 allergens of house dust mites (HDMs) are cysteine protease digestive enzymes. By increasing the detection of any allergen by dendritic antigen presenting cells, upregulating inflammatory signalling molecules, and activating cells crucial to the transition from innate to acquired immune responses, the proteolytic activity of these HDM allergens also underlies their behaviour as inhalant allergens. The significance of this property is underlined by the attenuation of allergic responses to HDMs by novel inhibitors in experimental models. The group 1 HDM allergens act as prothrombinases, enabling them to operate the canonical stimulation of protease activated receptors 1 and 4. This leads to the ligation of Toll-like receptor 4, which is an indispensable component in HDM allergy development, and reactive oxidant-regulated gene expression. Intermediate steps involve epidermal growth factor receptor ligation, activation of a disintegrin and metalloproteases, and the opening of pannexons. Elements of this transduction pathway are shared with downstream signalling from biosensors which bind viral RNA, suggesting a mechanistic linkage between allergens and respiratory viruses in disease exacerbations. This review describes recent progress in the characterisation of an arterial route which links innate responses to inhaled allergens to events underpinning the progression of allergy to unrelated allergens.
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Affiliation(s)
- Jihui Zhang
- Institute for Infection & Immunity, St George's, University of London, Cranmer Terrace, London SW17 0RE, United Kingdom.
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China.
| | - Jie Chen
- Institute for Infection & Immunity, St George's, University of London, Cranmer Terrace, London SW17 0RE, United Kingdom.
| | - Clive Robinson
- Institute for Infection & Immunity, St George's, University of London, Cranmer Terrace, London SW17 0RE, United Kingdom.
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44
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Schink A, Neumann J, Leifke AL, Ziegler K, Fröhlich-Nowoisky J, Cremer C, Thines E, Weber B, Pöschl U, Schuppan D, Lucas K. Screening of herbal extracts for TLR2- and TLR4-dependent anti-inflammatory effects. PLoS One 2018; 13:e0203907. [PMID: 30307962 PMCID: PMC6181297 DOI: 10.1371/journal.pone.0203907] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 08/29/2018] [Indexed: 12/18/2022] Open
Abstract
Herbal extracts represent an ample source of natural compounds, with potential to be used in improving human health. There is a growing interest in using natural extracts as possible new treatment strategies for inflammatory diseases. We therefore aimed at identifying herbal extracts that affect inflammatory signaling pathways through toll-like receptors (TLRs), TLR2 and TLR4. Ninety-nine ethanolic extracts were screened in THP-1 monocytes and HeLa-TLR4 transfected reporter cells for their effects on stimulated TLR2 and TLR4 signaling pathways. The 28 identified anti-inflammatory extracts were tested in comparative assays of stimulated HEK-TLR2 and HEK-TLR4 transfected reporter cells to differentiate between direct TLR4 antagonistic effects and interference with downstream signaling cascades. Furthermore, the ten most effective anti-inflammatory extracts were tested on their ability to inhibit nuclear factor-κB (NF-κB) translocation in HeLa-TLR4 transfected reporter cell lines and for their ability to repolarize M1-type macrophages. Ethanolic extracts which showed the highest anti-inflammatory potential, up to a complete inhibition of pro-inflammatory cytokine production were Castanea sativa leaves, Cinchona pubescens bark, Cinnamomum verum bark, Salix alba bark, Rheum palmatum root, Alchemilla vulgaris plant, Humulus lupulus cones, Vaccinium myrtillus berries, Curcuma longa root and Arctostaphylos uva-ursi leaves. Moreover, all tested extracts mitigated not only TLR4, but also TLR2 signaling pathways. Seven of them additionally inhibited translocation of NF-κB into the nucleus. Two of the extracts showed impact on repolarization of pro-inflammatory M1-type to anti-inflammatory M2-type macrophages. Several promising anti-inflammatory herbal extracts were identified in this study, including extracts with previously unknown influence on key TLR signaling pathways and macrophage repolarization, serving as a basis for novel lead compound identification.
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Affiliation(s)
- Anne Schink
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
| | - Jan Neumann
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
- Institute of Molecular Biology, Mainz, Germany
| | - Anna Lena Leifke
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
| | - Kira Ziegler
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
| | | | - Christoph Cremer
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
- Institute of Molecular Biology, Mainz, Germany
| | - Eckhard Thines
- Institut für Biotechnologie und Wirkstoff-Forschung gGmbH, Kaiserslautern, Germany
- Institute of Molecular Physiology, Johannes Gutenberg University Mainz, Mainz, Germany
| | - Bettina Weber
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
| | - Ulrich Pöschl
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
| | - Detlef Schuppan
- Institute of Translational Immunology, University of Mainz Medical Center, Mainz, Germany
- Division of Gastroenterology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States of America
| | - Kurt Lucas
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
- * E-mail:
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45
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Shalaby KH, Lyons-Cohen MR, Whitehead GS, Thomas SY, Prinz I, Nakano H, Cook DN. Pathogenic T H17 inflammation is sustained in the lungs by conventional dendritic cells and Toll-like receptor 4 signaling. J Allergy Clin Immunol 2018; 142:1229-1242.e6. [PMID: 29154958 PMCID: PMC5951733 DOI: 10.1016/j.jaci.2017.10.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 09/21/2017] [Accepted: 10/02/2017] [Indexed: 12/23/2022]
Abstract
BACKGROUND Mechanisms that elicit mucosal TH17 cell responses have been described, yet how these cells are sustained in chronically inflamed tissues remains unclear. OBJECTIVE We sought to understand whether maintenance of lung TH17 inflammation requires environmental agents in addition to antigen and to identify the lung antigen-presenting cell (APC) types that sustain the self-renewal of TH17 cells. METHODS Animals were exposed repeatedly to aspiration of ovalbumin alone or together with environmental adjuvants, including common house dust extract (HDE), to test their role in maintaining lung inflammation. Alternatively, antigen-specific effector/memory TH17 cells, generated in culture with CD4+ T cells from Il17a fate-mapping mice, were adoptively transferred to assess their persistence in genetically modified animals lacking distinct lung APC subsets or cell-specific Toll-like receptor (TLR) 4 signaling. TH17 cells were also cocultured with lung APC subsets to determine which of these could revive their expansion and activation. RESULTS TH17 cells and the consequent neutrophilic inflammation were poorly sustained by inhaled antigen alone but were augmented by inhalation of antigen together with HDE. This was associated with weight loss and changes in lung physiology consistent with interstitial lung disease. The effect of HDE required TLR4 signaling predominantly in lung hematopoietic cells, including CD11c+ cells. CD103+ and CD11b+ conventional dendritic cells interacted directly with TH17 cells in situ and revived the clonal expansion of TH17 cells both ex vivo and in vivo, whereas lung macrophages and B cells could not. CONCLUSION TH17-dependent inflammation in the lungs can be sustained by persistent TLR4-mediated activation of lung conventional dendritic cells.
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Affiliation(s)
- Karim H Shalaby
- Immunogenetics Group, Immunity, Inflammation and Disease Laboratory, Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC
| | - Miranda R Lyons-Cohen
- Immunogenetics Group, Immunity, Inflammation and Disease Laboratory, Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC
| | - Gregory S Whitehead
- Immunogenetics Group, Immunity, Inflammation and Disease Laboratory, Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC
| | - Seddon Y Thomas
- Immunogenetics Group, Immunity, Inflammation and Disease Laboratory, Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC
| | - Immo Prinz
- Institut für Immunologie, Medizinische Hochschule, Hannover, Germany
| | - Hideki Nakano
- Immunogenetics Group, Immunity, Inflammation and Disease Laboratory, Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC
| | - Donald N Cook
- Immunogenetics Group, Immunity, Inflammation and Disease Laboratory, Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC.
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46
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Michels KR, Lukacs NW, Fonseca W. TLR Activation and Allergic Disease: Early Life Microbiome and Treatment. Curr Allergy Asthma Rep 2018; 18:61. [PMID: 30259206 DOI: 10.1007/s11882-018-0815-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE OF REVIEW Allergy and asthma are growing problems in the developed world. The accelerated increase of these diseases may be related to microbiome modification that leads to aberrant activation of Toll-like receptors (TLRs). Current research supports the concept that changes in microbial communities in early life impact TLR activation, resulting in an altered risk for the development of asthma and allergies. RECENT FINDINGS Prenatal and early childhood events that generate microbiome modification are closely related with TLR activation. Early childhood exposure to a rich array of TLR agonists, particularly lipopolysaccharide, strongly predicts protection against allergic disease later in life even when other lifestyle factors are accounted for. Genetic deletion of TLR signaling components in mice results in reduced function of tolerogenic cell populations in the gut. In contrast, weak TLR signaling can promote allergic sensitization later in life. This review summarizes the role of TLR signaling in microbiome-mediated protection against allergy.
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Affiliation(s)
- Kathryn R Michels
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA.
| | - Nicholas W Lukacs
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA.,Mary H. Weiser Food Allergy Center, University of Michigan, Ann Arbor, MI, USA
| | - Wendy Fonseca
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
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47
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Leffler J, Stumbles PA, Strickland DH. Immunological Processes Driving IgE Sensitisation and Disease Development in Males and Females. Int J Mol Sci 2018; 19:E1554. [PMID: 29882879 PMCID: PMC6032271 DOI: 10.3390/ijms19061554] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 05/21/2018] [Accepted: 05/21/2018] [Indexed: 01/15/2023] Open
Abstract
IgE sensitisation has increased significantly over the last decades and is a crucial factor in the development of allergic diseases. IgE antibodies are produced by B cells through the process of antigen presentation by dendritic cells, subsequent differentiation of CD4⁺ Th2 cells, and class switching in B cells. However, many of the factors regulating these processes remain unclear. These processes affect males and females differently, resulting in a significantly higher prevalence of IgE sensitisation in males compared to females from an early age. Before the onset of puberty, this increased prevalence of IgE sensitisation is also associated with a higher prevalence of clinical symptoms in males; however, after puberty, females experience a surge in the incidence of allergic symptoms. This is particularly apparent in allergic asthma, but also in other allergic diseases such as food and contact allergies. This has been partly attributed to the pro- versus anti-allergic effects of female versus male sex hormones; however, it remains unclear how the expression of sex hormones translates IgE sensitisation into clinical symptoms. In this review, we describe the recent epidemiological findings on IgE sensitisation in male and females and discuss recent mechanistic studies casting further light on how the expression of sex hormones may influence the innate and adaptive immune system at mucosal surfaces and how sex hormones may be involved in translating IgE sensitisation into clinical manifestations.
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Affiliation(s)
- Jonatan Leffler
- Telethon Kids Institute, The University of Western Australia, 100 Roberts Rd, Subiaco, WA 6008, Australia.
| | - Philip A Stumbles
- Telethon Kids Institute, The University of Western Australia, 100 Roberts Rd, Subiaco, WA 6008, Australia.
- School of Paediatrics and Child Health, The University of Western Australia, Subiaco, WA 6008, Australia.
- School of Veterinary and Life Sciences, Murdoch University, Murdoch, WA 6150, Australia.
| | - Deborah H Strickland
- Telethon Kids Institute, The University of Western Australia, 100 Roberts Rd, Subiaco, WA 6008, Australia.
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48
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Zakeri A, Russo M. Dual Role of Toll-like Receptors in Human and Experimental Asthma Models. Front Immunol 2018; 9:1027. [PMID: 29867994 PMCID: PMC5963123 DOI: 10.3389/fimmu.2018.01027] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 04/24/2018] [Indexed: 12/31/2022] Open
Abstract
Asthma is a chronic airway inflammatory disease that is influenced by the interplay between genetic factors and exposure to environmental allergens, microbes, or microbial products where toll-like receptors (TLRs) play a pivotal role. TLRs recognize a wide range of microbial or endogenous molecules as well as airborne environmental allergens and act as adjuvants that influence positively or negatively allergic sensitization. TLRs are qualitatively and differentially expressed on hematopoietic and non-hematopoietic stromal or structural airway cells that when activated by TLRs agonists exert an immune-modulatory role in asthma development. Therefore, understanding mechanisms and pathways by which TLRs orchestrate asthma outcomes may offer new strategies to control the disease. Here, we aim to review and critically discuss the role of TLRs in human asthma and murine models of allergic airway inflammation, highlighting the complexity of TLRs function in development, exacerbation, or control of airway allergic inflammation.
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Affiliation(s)
- Amin Zakeri
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark
| | - Momtchilo Russo
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
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49
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Thomas SY, Whitehead GS, Takaku M, Ward JM, Xu X, Nakano K, Lyons-Cohen MR, Nakano H, Gowdy KM, Wade PA, Cook DN. MyD88-dependent dendritic and epithelial cell crosstalk orchestrates immune responses to allergens. Mucosal Immunol 2018; 11:796-810. [PMID: 29067999 PMCID: PMC5918466 DOI: 10.1038/mi.2017.84] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 08/22/2017] [Indexed: 02/04/2023]
Abstract
Sensitization to inhaled allergens is dependent on activation of conventional dendritic cells (cDCs) and on the adaptor molecule, MyD88. However, many cell types in the lung express Myd88, and it is unclear how signaling in these different cell types reprograms cDCs and leads to allergic inflammation of the airway. By combining ATAC-seq with RNA profiling, we found that MyD88 signaling in cDCs maintained open chromatin at select loci even at steady state, allowing genes to be rapidly induced during allergic sensitization. A distinct set of genes related to metabolism was indirectly controlled in cDCs through MyD88 signaling in airway epithelial cells (ECs). In mouse models of asthma, Myd88 expression in ECs was critical for eosinophilic inflammation, whereas Myd88 expression in cDCs was required for Th17 cell differentiation and consequent airway neutrophilia. Thus, both cell-intrinsic and cell-extrinsic MyD88 signaling controls gene expression in cDCs and orchestrates immune responses to inhaled allergens.
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Affiliation(s)
- Seddon Y. Thomas
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, USA
| | - Gregory S. Whitehead
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, USA
| | - Motoki Takaku
- Embryonic Stem Cell and Chromatin Biology Laboratory, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, USA
| | - James M. Ward
- Integrated Bioinformatics, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, USA
| | - Xiaojiang Xu
- Integrated Bioinformatics, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, USA
| | - Keiko Nakano
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, USA
| | - Miranda R. Lyons-Cohen
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, USA
| | - Hideki Nakano
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, USA
| | - Kymberly M. Gowdy
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, USA
- Department of Pharmacology & Toxicology, Brody School of Medicine at East Carolina University, Greenville, North Carolina 27834, USA
| | - Paul A. Wade
- Embryonic Stem Cell and Chromatin Biology Laboratory, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, USA
| | - Donald N. Cook
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, USA
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50
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Ishii T, Niikura Y, Kurata K, Muroi M, Tanamoto K, Nagase T, Sakaguchi M, Yamashita N. Time-dependent distinct roles of Toll-like receptor 4 in a house dust mite-induced asthma mouse model. Scand J Immunol 2018; 87. [PMID: 29337391 DOI: 10.1111/sji.12641] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 01/09/2018] [Indexed: 12/28/2022]
Abstract
House dust mites (HDMs) are a common source of allergens that trigger both allergen-specific and innate immune responses in humans. Here, we examined the effect of allergen concentration and the involvement of Toll-like receptor 4 (TLR4) in the process of sensitization to house dust mite allergens in an HDM extract-induced asthma mouse model. Intranasal administration of HDM extract induced an immunoglobulin E response and eosinophilic inflammation in a dose-dependent manner from 2.5 to 30 μg/dose. In TLR4-knockout mice, the infiltration of eosinophils and neutrophils into the lung was decreased compared with that in wild-type mice in the early phase of inflammation (total of three doses). However, in the late phase of inflammation (total of seven doses), eosinophil infiltration was significantly greater in TLR4-knockout mice than in wild-type mice. This suggests that the roles of TLR4 signaling are different between the early phase and the later phase of HDM allergen-induced inflammation. Thus, innate immune response through TLR4 regulated the response to HDM allergens, and the regulation was altered during the phase of inflammation.
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Affiliation(s)
- T Ishii
- Department of Pharmacotherapy, Research Institute of Pharmaceutical Sciences, Musashino University, Tokyo, Japan.,Department of Pulmonary Medicine, Faculty of Medicine, University of Tokyo, Tokyo, Japan
| | - Y Niikura
- Department of Pharmacotherapy, Research Institute of Pharmaceutical Sciences, Musashino University, Tokyo, Japan
| | - K Kurata
- ITEA Inc., Institute of Tokyo Environmental Allergy, Tokyo, Japan
| | - M Muroi
- Research Institute of Pharmaceutical Sciences, Musashino University, Tokyo, Japan
| | - K Tanamoto
- Research Institute of Pharmaceutical Sciences, Musashino University, Tokyo, Japan
| | - T Nagase
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tokyo, Tokyo, Japan
| | - M Sakaguchi
- Department of Veterinary Microbiology, School of Veterinary Medicine, Azabu University, Kanagawa, Japan
| | - N Yamashita
- Department of Pharmacotherapy, Research Institute of Pharmaceutical Sciences, Musashino University, Tokyo, Japan
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