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Peng Q, Luo X, Mo L, Xu X, Liu Y, Liu D, Yang P. TRIM41 contributes to the pathogenesis of airway allergy by compromising dendritic cells' tolerogenic properties. iScience 2024; 27:110067. [PMID: 38883815 PMCID: PMC11176661 DOI: 10.1016/j.isci.2024.110067] [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: 12/21/2023] [Revised: 03/19/2024] [Accepted: 05/17/2024] [Indexed: 06/18/2024] Open
Abstract
Dendritic cells (DC) play a crucial role in the initiation of immune responses. TRIM41, an E3 ubiquitin ligase, can facilitate targeting protein degradation. The purpose of this study is to analyze the role of TRIM41 in the pathogenesis of airway allergy (AA) and the impact of regulating TRIM41 on suppressing AA. We observed that the airway DCs of AA mice had a higher expression of Trim41. The expression of Trim41 in airway DCs was associated with the DCs' tolerogenic functions of AA mice. The AA responses, including increased amounts of eosinophil peroxidase, mast cell protease-1, Th2 cytokines, and specific IgE in bronchoalveolar lavage fluids, were positively correlated with the Trim41 expression in mouse airway DCs. TRIM41 induced c-Maf degradation and interfered with the Il10 expression in airway DCs, which could be counteracted by inhibiting TRIM41. Regulation of TRIM41 mitigated experimental AA responses.
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Affiliation(s)
- Qiuying Peng
- Department of Pediatric Otolaryngology, Shenzhen Hospital of Southern Medical University, Shenzhen, China
- Department of Pediatrics, Guangzhou Panyu Maternal and Children Health Hospital, Guangzhou, China
| | - Xiangqian Luo
- Department of Pediatric Otolaryngology, Shenzhen Hospital of Southern Medical University, Shenzhen, China
| | - Lihua Mo
- Department of Pediatric Otolaryngology, Shenzhen Hospital of Southern Medical University, Shenzhen, China
- Institute of Allergy & Immunology of Shenzhen University and State Key Laboratory of Respiratory Diseases Allergy Division at Shenzhen University, Shenzhen, China
- Department of General Practice Medicine, Third Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Xuejie Xu
- Institute of Allergy & Immunology of Shenzhen University and State Key Laboratory of Respiratory Diseases Allergy Division at Shenzhen University, Shenzhen, China
| | - Yu Liu
- Department of General Practice Medicine, Third Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Dabo Liu
- Department of Pediatric Otolaryngology, Shenzhen Hospital of Southern Medical University, Shenzhen, China
| | - Pingchang Yang
- Institute of Allergy & Immunology of Shenzhen University and State Key Laboratory of Respiratory Diseases Allergy Division at Shenzhen University, Shenzhen, China
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Sun Z, Chen A, Fang H, Sun D, Huang M, Cheng E, Luo M, Zhang X, Fang H, Qian G. B cell-derived IL-10 promotes the resolution of lipopolysaccharide-induced acute lung injury. Cell Death Dis 2023; 14:418. [PMID: 37443161 PMCID: PMC10345008 DOI: 10.1038/s41419-023-05954-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 06/27/2023] [Accepted: 07/05/2023] [Indexed: 07/15/2023]
Abstract
Inflammation resolution is critical for acute lung injury (ALI) recovery. Interleukin (IL)-10 is a potent anti-inflammatory factor. However, its role in ALI resolution remains unclear. We investigated the effects of IL-10 during the ALI resolution process in a murine lipopolysaccharide (LPS)-induced ALI model. Blockade of IL-10 signaling aggravates LPS-induced lung injury, as manifested by elevated pro-inflammatory factors production and increased neutrophils recruitment to the lung. Thereafter, we used IL-10 GFP reporter mice to discern the source cell of IL-10 during ALI. We found that IL-10 is predominantly generated by B cells during the ALI recovery process. Furthermore, we used IL-10-specific loss in B-cell mice to elucidate the effect of B-cell-derived IL-10 on the ALI resolution process. IL-10-specific loss in B cells leads to increased pro-inflammatory cytokine expression, persistent leukocyte infiltration, and prolonged alveolar barrier damage. Mechanistically, B cell-derived IL-10 inhibits the activation and recruitment of macrophages and downregulates the production of chemokine KC that recruits neutrophils to the lung. Moreover, we found that IL-10 deletion in B cells leads to alterations in the cGMP-PKG signaling pathway. In addition, an exogenous supply of IL-10 promotes recovery from LPS-induced ALI, and IL-10-secreting B cells are present in sepsis-related ARDS. This study highlights that B cell-derived IL-10 is critical for the resolution of LPS-induced ALI and may serve as a potential therapeutic target.
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Affiliation(s)
- Zhun Sun
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China
| | - Anning Chen
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China
| | - Hongwei Fang
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Donglin Sun
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China
| | - Meiying Huang
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China
| | - Erdeng Cheng
- Department of Anesthesiology, Minhang Hospital, Fudan University, Shanghai, China
| | - Mengyuan Luo
- Department of Anesthesiology, Minhang Hospital, Fudan University, Shanghai, China
| | - Xiaoren Zhang
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China.
| | - Hao Fang
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China.
- Department of Anesthesiology, Minhang Hospital, Fudan University, Shanghai, China.
| | - Guojun Qian
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China.
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He L, Liu J, Wang X, Wang Y, Zhu J, Kang X. Identifying a novel serum microRNA biomarker panel for the diagnosis of childhood asthma. Exp Biol Med (Maywood) 2022; 247:1732-1740. [PMID: 36000159 PMCID: PMC9638957 DOI: 10.1177/15353702221114870] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The pathological mechanism of childhood asthma is complex, and timely diagnosis is the key to effective prevention and control of childhood asthma. We collected 170 serum samples from 95 children with asthma and 75 healthy children. Serum miRNA biomarkers were analyzed by Illumina sequencing for childhood asthma. Differentially serum miRNAs were confirmed with quantitative reverse transcription polymerase chain reaction (qRT-PCR) assay. The Illumina sequencing data showed the differential expression of 111 serum miRNAs among asthmatic and healthy children. After confirmation of miRNAs expression through qRT-PCR, four of them (namely hsa-miR-106a-5p, hsa-miR-18a-5p, hsa-miR-144-3p, and hsa-miR-375) manifested significant differential expression between asthmatic children and healthy controls. The biomarkers classification tree model created with these four miRNAs using the Biomarker Patterns Software could effectively separate childhood asthma and healthy children, with a specificity of 88.3%, a sensitivity of 95.0%, and an area under the curve (AUC) value of 0.942. The regulatory networks containing miRNAs and their gene targets suggested that the four miRNAs might have gene targets implicated in inflammation, immunity, and transcriptional efficiency. Taken together, this four-serum-miRNA panel is a promising biomarker to diagnose childhood asthma noninvasively.
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Affiliation(s)
- Linjuan He
- College of Life and Environmental Science, Hangzhou Normal University, Hangzhou 311121, China
| | - Jiyan Liu
- College of Life and Environmental Science, Hangzhou Normal University, Hangzhou 311121, China,Department of Academic Journals, Hangzhou Normal University, Hangzhou 311121, China,Jiyan Liu.
| | - Xiaoyue Wang
- Department of Academic Journals, Hangzhou Normal University, Hangzhou 311121, China
| | - Yuanzhao Wang
- Department of Pediatrics, Zhejiang Hospital of Traditional Chinese Medicine, Hangzhou 310006, China
| | - Jiawen Zhu
- Department of Pediatrics, Zhejiang Hospital of Traditional Chinese Medicine, Hangzhou 310006, China
| | - Xuexue Kang
- College of Life and Environmental Science, Hangzhou Normal University, Hangzhou 311121, China
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Tamasauskiene L, Sitkauskiene B. Systemic and local cytokine profile and risk factors for persistent allergic airway inflammation in patients sensitised to house dust mite allergens. BMC Pulm Med 2021; 21:424. [PMID: 34930201 PMCID: PMC8690867 DOI: 10.1186/s12890-021-01798-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 12/15/2021] [Indexed: 01/01/2023] Open
Abstract
Objective To evaluate cytokine profile, vitamin D status, symptom score and quality of life in patients with persistent allergic airway diseases sensitised to house dust mites (HDM) in comparison with healthy individuals. Material and methods Patients sensitized to HDM with persistent AR and having symptoms for at least 2 years with or without AA were involved into the study. Measurements of vitamin D level in serum and IL-10, IL-13, IL-17, IL-22, IL-33 and IFN-gamma in serum and nasal lavage were performed by ELISA. Results Eighty-one subjects were involved into the study. Serum IL-10 concentration was higher in patients with AR than in patients with AR and AA (6.71 ± 1.73 vs. 1.98 ± 0.24, p < 0.05). IFN-gamma level in nasal lavage was higher in patients with AR and AA than in patients with AR (p < 0.01) and healthy individuals (p < 0.05) (7.50 ± 0.37 vs. 6.80 ± 0.99 vs. 6.50 ± 0.22). Serum IL-22 negatively correlated with IL-22 in nasal lavage, whereas serum IFN-gamma positively correlated with IFN-gamma in nasal lavage. Positive correlation between serum IL-17 and total IgE and negative correlation between IL-17 in nasal lavage and eosinophils in nasal smear were found in patients with AR and AA. Serum IFN-gamma decreased the risk of AR for healthy individuals. Serum IL-10 and vitamin D decreased risk for development of AA for patients with AR. IL-22 in serum and IL-10 and IL-33 in nasal lavage increased this risk. Conclusion Novel cytokines such as IL-22, IL-17 and IL-33 and vitamin D may be involved in pathogenesis of persistent airway inflammation in patients sensitized to HDM.
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Affiliation(s)
- Laura Tamasauskiene
- Department of Immunology and Allergology, Lithuanian University of Health Sciences, Eiveniu str. 2, Kaunas, Lithuania. .,Laboratory of Immunology, Department of Immunology and Allergology, Lithuanian University of Health Sciences, Eiveniu str. 2, 50009, Kaunas, Lithuania.
| | - Brigita Sitkauskiene
- Department of Immunology and Allergology, Lithuanian University of Health Sciences, Eiveniu str. 2, Kaunas, Lithuania
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Zhong Q, Lu Y, Xu W, Rong Z, Chang X, Qin L, Chen X, Zhou F. The differentiation of new human CD303 + Plasmacytoid dendritic cell subpopulations expressing CD205 and/or CD103 regulated by Non-Small-Cell lung cancer cells. Int Immunopharmacol 2021; 99:107983. [PMID: 34298400 DOI: 10.1016/j.intimp.2021.107983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 07/09/2021] [Accepted: 07/10/2021] [Indexed: 11/26/2022]
Abstract
CD303+ plasmacytoid dendritic cells (pDCs) play an important role in the induction of immune tolerance and antitumor immunity. Here, we focused on the effect of NSCLC cells on the development of CD303+ pDC subsets expressing CD205 and/or CD103. The NSCLC cell line H1299 and primary NSCLC cells were incubated with DCs. The protein expression of costimulatory molecules on CD303+ pDCs, the production of pro-inflammatory and anti-inflammatory cytokines by CD303+ pDCs and the development of CD303+ pDC subsets were detected by using flow cytometry. Coculture with NSCLC cells modulates the protein expression of CD86 and HLA-DR on CD303+ pDCs. Moreover, NSCLC cells suppressed the production of IL-12 and IL-23 but facilitated the secretion of IL-27 and TGF-β by CD303+ pDCs. There were new CD303+ pDC subsets expressing CD205 and/or CD103 in healthy donors and NSCLC patients: CD303+CD205+CD103+, CD303+CD205+CD103-, CD303+CD205-CD103+ and CD303+CD205-CD103- pDCs. NSCLC cells modulated the differentiation of CD303+ pDC subpopulations by regulating the protein expression of CD205 and/or CD103 on CD303+ pDCs. NSCLC cells may regulate the immune functions of CD303+ pDCs by modulating the expression of costimulatory molecules on DCs and the production of pro-inflammatory/anti-inflammatory cytokines by DCs. NSCLC cells also regulate the development of CD303+ pDC subsets expressing CD205 and/or CD103. These outcomes may reveal a new cellular mechanism leading to the NSCLC-induced immune-suppressive microenvironment.
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Affiliation(s)
- Qifeng Zhong
- Department of Experimental and Clinical Immunology, CAS Lamvac Biotech Co., Ltd. Huangpu, Guangzhou, Guangdong, PR China
| | - Yong Lu
- Department of Experimental and Clinical Immunology, CAS Lamvac Biotech Co., Ltd. Huangpu, Guangzhou, Guangdong, PR China
| | - Wenlong Xu
- Department of Experimental and Clinical Immunology, CAS Lamvac Biotech Co., Ltd. Huangpu, Guangzhou, Guangdong, PR China
| | - Zhien Rong
- Department of Experimental and Clinical Immunology, CAS Lamvac Biotech Co., Ltd. Huangpu, Guangzhou, Guangdong, PR China
| | - Xu Chang
- Department of Experimental and Clinical Immunology, CAS Lamvac Biotech Co., Ltd. Huangpu, Guangzhou, Guangdong, PR China
| | - Li Qin
- Department of Experimental and Clinical Immunology, CAS Lamvac Biotech Co., Ltd. Huangpu, Guangzhou, Guangdong, PR China
| | - Xiaoping Chen
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510820, PR China; State Key Laboratory of Respiratory Disease, Center of Infection and Immunity, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, Guangdong, PR China; Department of Experimental and Clinical Immunology, CAS Lamvac Biotech Co., Ltd. Huangpu, Guangzhou, Guangdong, PR China.
| | - Fang Zhou
- Department of Experimental and Clinical Immunology, CAS Lamvac Biotech Co., Ltd. Huangpu, Guangzhou, Guangdong, PR China.
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Rauer D, Gilles S, Wimmer M, Frank U, Mueller C, Musiol S, Vafadari B, Aglas L, Ferreira F, Schmitt‐Kopplin P, Durner J, Winkler JB, Ernst D, Behrendt H, Schmidt‐Weber CB, Traidl‐Hoffmann C, Alessandrini F. Ragweed plants grown under elevated CO 2 levels produce pollen which elicit stronger allergic lung inflammation. Allergy 2021; 76:1718-1730. [PMID: 33037672 DOI: 10.1111/all.14618] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 09/10/2020] [Accepted: 09/11/2020] [Indexed: 12/16/2022]
Abstract
BACKGROUND Common ragweed has been spreading as a neophyte in Europe. Elevated CO2 levels, a hallmark of global climate change, have been shown to increase ragweed pollen production, but their effects on pollen allergenicity remain to be elucidated. METHODS Ragweed was grown in climate-controlled chambers under normal (380 ppm, control) or elevated (700 ppm, based on RCP4.5 scenario) CO2 levels. Aqueous pollen extracts (RWE) from control- or CO2 -pollen were administered in vivo in a mouse model for allergic disease (daily for 3-11 days, n = 5) and employed in human in vitro systems of nasal epithelial cells (HNECs), monocyte-derived dendritic cells (DCs), and HNEC-DC co-cultures. Additionally, adjuvant factors and metabolites in control- and CO2 -RWE were investigated using ELISA and untargeted metabolomics. RESULTS In vivo, CO2 -RWE induced stronger allergic lung inflammation compared to control-RWE, as indicated by lung inflammatory cell infiltrate and mediators, mucus hypersecretion, and serum total IgE. In vitro, HNECs stimulated with RWE increased indistinctively the production of pro-inflammatory cytokines (IL-8, IL-1β, and IL-6). In contrast, supernatants from CO2 -RWE-stimulated HNECs, compared to control-RWE-stimulated HNECS, significantly increased TNF and decreased IL-10 production in DCs. Comparable results were obtained by stimulating DCs directly with RWEs. The metabolome analysis revealed differential expression of secondary plant metabolites in control- vs CO2 -RWE. Mixes of these metabolites elicited similar responses in DCs as compared to respective RWEs. CONCLUSION Our results indicate that elevated ambient CO2 levels elicit a stronger RWE-induced allergic response in vivo and in vitro and that RWE increased allergenicity depends on the interplay of multiple metabolites.
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Affiliation(s)
- Denise Rauer
- Chair and Institute of Environmental Medicine UNIKA‐T, Technical University of Munich and Helmholtz Zentrum München Augsburg Germany
| | - Stefanie Gilles
- Chair and Institute of Environmental Medicine UNIKA‐T, Technical University of Munich and Helmholtz Zentrum München Augsburg Germany
| | - Maria Wimmer
- Center of Allergy & Environment (ZAUM) Technical University of Munich (TUM) and Helmholtz Zentrum München Munich Germany
- Members of the German Center of Lung Research (DZL) Munich Germany
| | - Ulrike Frank
- Institute of Biochemical Plant Pathology (BIOP) Helmholtz Zentrum München Neuherberg Germany
| | - Constanze Mueller
- BGC Research Unit Analytical BioGeoChemistry Helmholtz Zentrum München Neuherberg Germany
| | - Stephanie Musiol
- Center of Allergy & Environment (ZAUM) Technical University of Munich (TUM) and Helmholtz Zentrum München Munich Germany
- Members of the German Center of Lung Research (DZL) Munich Germany
| | - Behnam Vafadari
- Chair and Institute of Environmental Medicine UNIKA‐T, Technical University of Munich and Helmholtz Zentrum München Augsburg Germany
| | - Lorenz Aglas
- Department of Biosciences University of Salzburg Salzburg Austria
| | - Fatima Ferreira
- Department of Biosciences University of Salzburg Salzburg Austria
| | | | - Jörg Durner
- Institute of Biochemical Plant Pathology (BIOP) Helmholtz Zentrum München Neuherberg Germany
| | - Jana Barbro Winkler
- Research Unit Environmental Simulation Institute of Biochemical Plant Pathology Helmholtz Zentrum München Neuherberg Germany
| | - Dieter Ernst
- Institute of Biochemical Plant Pathology (BIOP) Helmholtz Zentrum München Neuherberg Germany
| | - Heidrun Behrendt
- Center of Allergy & Environment (ZAUM) Technical University of Munich (TUM) and Helmholtz Zentrum München Munich Germany
| | - Carsten B. Schmidt‐Weber
- Center of Allergy & Environment (ZAUM) Technical University of Munich (TUM) and Helmholtz Zentrum München Munich Germany
- Members of the German Center of Lung Research (DZL) Munich Germany
| | - Claudia Traidl‐Hoffmann
- Chair and Institute of Environmental Medicine UNIKA‐T, Technical University of Munich and Helmholtz Zentrum München Augsburg Germany
- Outpatient Clinic for Environmental Medicine University Clinic Augsburg Augsburg Germany
- Christine‐Kühne Center for Allergy Research and Education (CK‐Care) Davos Switzerland
| | - Francesca Alessandrini
- Center of Allergy & Environment (ZAUM) Technical University of Munich (TUM) and Helmholtz Zentrum München Munich Germany
- Members of the German Center of Lung Research (DZL) Munich Germany
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Kucuksezer UC, Ozdemir C, Cevhertas L, Ogulur I, Akdis M, Akdis CA. Mechanisms of allergen-specific immunotherapy and allergen tolerance. Allergol Int 2020; 69:549-560. [PMID: 32900655 DOI: 10.1016/j.alit.2020.08.002] [Citation(s) in RCA: 81] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 08/10/2020] [Indexed: 12/28/2022] Open
Abstract
Allergen-specific immunotherapy (AIT) is the mainstay treatment for the cure of allergic disorders, with depicted efficacy and safety by several trials and meta-analysis. AIT impressively contributes to the management of allergic rhinitis, asthma and venom allergies. Food allergy is a new arena for AIT with promising results, especially via novel administration routes. Cell subsets with regulatory capacities are induced during AIT. IL-10 and transforming growth factor (TGF)-β are the main suppressor cytokines, in addition to surface molecules such as cytotoxic T-lymphocyte-associated antigen-4 (CTLA-4) and programmed cell death protein-1 (PD-1) within the micro milieu. Modified T- and B-cell responses and antibody isotypes, increased activity thresholds for eosinophils, basophils and mast cells and consequent limitation of inflammatory cascades altogether induce and maintain a state of sustained allergen-specific unresponsiveness. Established tolerance is reflected into the clinical perspectives as improvement of allergy symptoms together with reduced medication requirements and evolved disease severity. Long treatment durations, costs, reduced patient compliance and risk of severe, even life-threatening adverse reactions during treatment stand as major limiting factors for AIT. By development of purified non-allergenic, highly-immunogenic modified allergen extracts, and combinational usage of them with novel adjuvant molecules via new routes may shorten treatment durations and possibly reduce these drawbacks. AIT is the best model for custom-tailored therapy of allergic disorders. Better characterization of disease endotypes, definition of specific biomarkers for diagnosis and therapy follow-up, as well as precision medicine approaches may further contribute to success of AIT in management of allergic disorders.
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Abstract
PURPOSE OF REVIEW Allergen immunotherapy is the only treatment modality which alters the natural course of allergic diseases by restoring immune tolerance against allergens. Deeper understanding of tolerance mechanisms will lead to the development of new vaccines, which target immune responses and promote tolerance. RECENT FINDINGS Successful allergen immunotherapy (AIT) induces allergen-specific peripheral tolerance, characterized mainly by the generation of allergen-specific Treg cells and reduction of Th2 cells. At the early phase, AIT leads to a decrease in the activity and degranulation of mast cells and basophils and a decrease in inflammatory responses of eosinophils in inflamed tissues. Treg cells show their effects by secreting inhibitory cytokines including interleukin (IL)-10, transforming growth factor-β, interfering with cellular metabolisms, suppressing antigen presenting cells and innate lymphoid cells (ILCs) and by cytolysis. AIT induces the development of regulatory B cells producing IL-10 and B cells expressing allergen-specific IgG4. Recent investigations have demonstrated that AIT is also associated with the formation of ILC2reg and DCreg cells which contribute to tolerance induction. SUMMARY Research done so far, has shown that multiple molecular and cellular factors are dysregulated in allergic diseases and modified by AIT. Studies should now focus on finding the best target and ideal biomarkers to identify ideal candidates for AIT.
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Ludwig K, Husain RA, Rubio I. mTORC1 Is Not Principally Involved in the Induction of Human Endotoxin Tolerance. Front Immunol 2020; 11:1515. [PMID: 32849516 PMCID: PMC7426365 DOI: 10.3389/fimmu.2020.01515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 06/09/2020] [Indexed: 11/13/2022] Open
Abstract
Endotoxin tolerance represents a safeguard mechanism for preventing detrimental prolonged inflammation and exaggerated immune/inflammatory responses from innate immune cells to recurrent harmless pathogens. On the other hand, excessive immune tolerance can contribute to pathological immunosuppression, e.g., as present in sepsis. Monocyte activation is accompanied by intracellular metabolic rearrangements that are reportedly orchestrated by the metabolic signaling node mTORC1. mTORC1-dependent metabolic re-wiring plays a major role in monocyte/macrophage polarization, but whether mTORC1 participates in the induction of endotoxin tolerance and other immune adaptive programs, such as immune training, is not clear. This connection has been difficult to test in the past due to the lack of appropriate models of human endotoxin tolerance allowing for the genetic manipulation of mTORC1. We have addressed this shortcoming by investigating monocytes from tuberous sclerosis (TSC) patients that feature a functional loss of the tumor suppressor TSC1/2 and a concomitant hyperactivation of mTORC1. Subjecting these cells to various protocols of immune priming and adaptation showed that the TSC monocytes are not compromised in the induction of tolerance. Analogously, we find that pharmacological mTORC1 inhibition does not prevent endotoxin tolerance induction in human monocytes. Interestingly, neither manipulation affected the capacity of activated monocytes to switch to increased lactic fermentation. In sum, our findings document that mTORC1 is unlikely to be involved in the induction of endotoxin tolerance in human monocytes and argue against a causal link between an mTORC1-dependent metabolic switch and the induction of immune tolerance.
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Affiliation(s)
- Kristin Ludwig
- Institute of Molecular Cell Biology, Center for Molecular Biomedicine, University Hospital Jena, Jena, Germany
| | - Ralf A Husain
- Department of Neuropediatrics, University Hospital Jena, Jena, Germany
| | - Ignacio Rubio
- Institute of Molecular Cell Biology, Center for Molecular Biomedicine, University Hospital Jena, Jena, Germany.,Clinic of Anaesthesiology and Intensive Care and Center for Sepsis Control and Care (CSCC), University Hospital Jena, Jena, Germany
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Branchett WJ, Stölting H, Oliver RA, Walker SA, Puttur F, Gregory LG, Gabryšová L, Wilson MS, O'Garra A, Lloyd CM. A T cell-myeloid IL-10 axis regulates pathogenic IFN-γ-dependent immunity in a mouse model of type 2-low asthma. J Allergy Clin Immunol 2020; 145:666-678.e9. [PMID: 31445933 PMCID: PMC7014588 DOI: 10.1016/j.jaci.2019.08.006] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 08/01/2019] [Accepted: 08/07/2019] [Indexed: 12/24/2022]
Abstract
BACKGROUND Although originally defined as a type 2 (T2) immune-mediated condition, non-T2 cytokines, such as IFN-γ and IL-17A, have been implicated in asthma pathogenesis, particularly in patients with severe disease. IL-10 regulates TH cell phenotypes and can dampen T2 immunity to allergens, but its functions in controlling non-T2 cytokine responses in asthmatic patients are unclear. OBJECTIVE We sought to determine how IL-10 regulates the balance of TH cell responses to inhaled allergen. METHODS Allergic airway disease was induced in wild-type, IL-10 reporter, and conditional IL-10 or IL-10 receptor α (IL-10Rα) knockout mice by means of repeated intranasal administration of house dust mite (HDM). IL-10 and IFN-γ signaling were disrupted by using blocking antibodies. RESULTS Repeated HDM inhalation induced a mixed IL-13/IL-17A response and accumulation of IL-10-producing forkhead box P3-negative effector CD4+ T cells in the lungs. Ablation of T cell-derived IL-10 increased the IFN-γ and IL-17A response to HDM, reducing IL-13 levels and airway eosinophilia without affecting IgE levels or airway hyperresponsiveness. The increased IFN-γ response could be recapitulated by IL-10Rα deletion in CD11c+ myeloid cells or local IL-10Rα blockade. Disruption of the T cell-myeloid IL-10 axis resulted in increased pulmonary monocyte-derived dendritic cell numbers and increased IFN-γ-dependent expression of CXCR3 ligands by airway macrophages, which is suggestive of a feedforward loop of TH1 cell recruitment. Augmented IFN-γ responses in the HDM allergic airway disease model were accompanied by increased disruption of airway epithelium, which was reversed by therapeutic blockade of IFN-γ. CONCLUSIONS IL-10 from effector T cells signals to CD11c+ myeloid cells to suppress an atypical and pathogenic IFN-γ response to inhaled HDM.
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Affiliation(s)
- William J Branchett
- National Heart and Lung Institute, Imperial College London, London, United Kingdom; Asthma UK Centre in Allergic Mechanisms of Asthma, Imperial College London, London, United Kingdom
| | - Helen Stölting
- National Heart and Lung Institute, Imperial College London, London, United Kingdom; Asthma UK Centre in Allergic Mechanisms of Asthma, Imperial College London, London, United Kingdom
| | - Robert A Oliver
- National Heart and Lung Institute, Imperial College London, London, United Kingdom; Asthma UK Centre in Allergic Mechanisms of Asthma, Imperial College London, London, United Kingdom
| | - Simone A Walker
- National Heart and Lung Institute, Imperial College London, London, United Kingdom; Asthma UK Centre in Allergic Mechanisms of Asthma, Imperial College London, London, United Kingdom
| | - Franz Puttur
- National Heart and Lung Institute, Imperial College London, London, United Kingdom; Asthma UK Centre in Allergic Mechanisms of Asthma, Imperial College London, London, United Kingdom
| | - Lisa G Gregory
- National Heart and Lung Institute, Imperial College London, London, United Kingdom; Asthma UK Centre in Allergic Mechanisms of Asthma, Imperial College London, London, United Kingdom
| | - Leona Gabryšová
- Immunoregulation and Infection Laboratory, Francis Crick Institute, London, United Kingdom
| | - Mark S Wilson
- Allergy and Anti-Helminth Immunity Laboratory, Francis Crick Institute, London, United Kingdom
| | - Anne O'Garra
- National Heart and Lung Institute, Imperial College London, London, United Kingdom; Immunoregulation and Infection Laboratory, Francis Crick Institute, London, United Kingdom
| | - Clare M Lloyd
- National Heart and Lung Institute, Imperial College London, London, United Kingdom; Asthma UK Centre in Allergic Mechanisms of Asthma, Imperial College London, London, United Kingdom.
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