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Tang H, Guo Y, Gan S, Chen Z, Dong M, Lin L, Chen H, Ji X, Xian M, Shi X, Tao A, Lv Y, Yao L, Chen R, Li S, Li J. GLUT1 mediates the release of HMGB1 from airway epithelial cells in mixed granulocytic asthma. Biochim Biophys Acta Mol Basis Dis 2024; 1870:167040. [PMID: 38281711 DOI: 10.1016/j.bbadis.2024.167040] [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: 08/11/2023] [Revised: 01/18/2024] [Accepted: 01/22/2024] [Indexed: 01/30/2024]
Abstract
Asthma is quite heterogenous and can be categorized as eosinophilic, mixed granulocytic (presence of both eosinophils and neutrophils in the airways) and neutrophilic. Clinically, mixed granulocytic asthma (MGA) often tends to be severe and requires large doses of corticosteroids. High mobility group box 1 (HMGB1) is one of the epithelium-derived alarmins that contributes to type 2 inflammation and asthma. This study was aimed to investigate the role of glucose transporter 1 (GLUT1) in modulation of airway epithelial HMGB1 production in MGA. Induced sputum and bronchial biopsy specimens were obtained from healthy subjects and asthma patients. BALB/c mice, the airway epithelial cell line BEAS-2B, or primary human bronchial epithelial cells (HBECs) were immunized with allergens. Intracellular and extracellular HMGB1 were both detected. The role of GLUT1 was assessed by using a pharmacological antagonist BAY876. MGA patients have a significant higher sputum HMGB1 level than the health and subjects with other inflammatory phenotypes. Nuclear-to-cytoplasmic translocation of HMGB1 was also observed in the bronchial epithelia. Allergen exposure markedly induced GLUT1 expression in murine lungs and cultured epithelial cells. Pharmacological antagonism of GLUT1 with BAY876 dramatically decreased airway hyperresponsiveness, neutrophil and eosinophil accumulation, as well as type 2 inflammation in murine models of MGA. Besides, the allergen-induced up-regulation of HMGB1 was also partly recovered by BAY876, accompanied by inhibited secretion into the airway lumen. In vitro, treatment with BAY876 relieved the allergen-induced over-expression and secretion of HMGB1 in airway epithelia. Taken together, our data indicated that GLUT1 mediates bronchial epithelial HMGB1 release in MGA.
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Affiliation(s)
- Haixiong Tang
- Department of Allergy and Clinical Immunology, Guangzhou Institute of Respiratory Health, National Clinical Research Center for Respiratory Disease, State Key Laboratory of Respiratory Disease, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yubiao Guo
- Department of Allergy and Clinical Immunology, Guangzhou Institute of Respiratory Health, National Clinical Research Center for Respiratory Disease, State Key Laboratory of Respiratory Disease, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Sudan Gan
- Department of Pulmonary and Critical Care Medicine, Guangzhou Institute of Respiratory Health, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Zemin Chen
- Department of Pulmonary and Critical Care Medicine, Guangzhou Institute of Respiratory Health, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Meihua Dong
- Department of Allergy and Clinical Immunology, Guangzhou Institute of Respiratory Health, National Clinical Research Center for Respiratory Disease, State Key Laboratory of Respiratory Disease, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Liqin Lin
- Department of Pulmonary and Critical Care Medicine, Guangzhou Institute of Respiratory Health, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Huifang Chen
- The Second Affiliated Hospital, State Key Laboratory of Respiratory Disease, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, Guangzhou Medical University, Guangzhou, China
| | - Xiaolong Ji
- Department of Allergy and Clinical Immunology, Guangzhou Institute of Respiratory Health, National Clinical Research Center for Respiratory Disease, State Key Laboratory of Respiratory Disease, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Mo Xian
- Department of Allergy and Clinical Immunology, Guangzhou Institute of Respiratory Health, National Clinical Research Center for Respiratory Disease, State Key Laboratory of Respiratory Disease, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xu Shi
- Department of Allergy and Clinical Immunology, Guangzhou Institute of Respiratory Health, National Clinical Research Center for Respiratory Disease, State Key Laboratory of Respiratory Disease, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Ailin Tao
- The Second Affiliated Hospital, State Key Laboratory of Respiratory Disease, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, Guangzhou Medical University, Guangzhou, China
| | - Yanhua Lv
- Department of Respiratory and Critical Care Medicine, Zhongshan City People's Hospital, Zhongshan, Gongdong, China
| | - Lihong Yao
- Department of Pulmonary and Critical Care Medicine, Guangzhou Institute of Respiratory Health, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Ruchong Chen
- Department of Allergy and Clinical Immunology, Guangzhou Institute of Respiratory Health, National Clinical Research Center for Respiratory Disease, State Key Laboratory of Respiratory Disease, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
| | - Shiyue Li
- Department of Pulmonary and Critical Care Medicine, Guangzhou Institute of Respiratory Health, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
| | - Jing Li
- Department of Allergy and Clinical Immunology, Guangzhou Institute of Respiratory Health, National Clinical Research Center for Respiratory Disease, State Key Laboratory of Respiratory Disease, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
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Lin CC, Law BF, Hettick JM. 4,4'-Methylene diphenyl diisocyanate exposure induces expression of alternatively activated macrophage-associated markers and chemokines partially through Krüppel-like factor 4 mediated signaling in macrophages. Xenobiotica 2023; 53:653-669. [PMID: 38014489 DOI: 10.1080/00498254.2023.2284867] [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: 09/18/2023] [Accepted: 11/12/2023] [Indexed: 11/29/2023]
Abstract
Occupational exposure to the most widely used monomeric diisocyanate (dNCO), 4,4'-methylene diphenyl diisocyanate (MDI), may lead to the development of occupational asthma (OA). Alveolar macrophages with alternatively activated (M2) phenotype have been implicated in allergic airway responses and the pathogenesis of asthma. Recent in vivo studies demonstrate that M2 macrophage-associated markers and chemokines are induced by MDI-exposure, however, the underlying molecular mechanism(s) by which this proceeds is unclear.Following MDI exposure (in vivo and in vitro) M2 macrophage-associated transcription factors (TFs), markers, and chemokines were determined by RT-qPCR, western blots, and ELISA.Expression of M2 macrophage-associated TFs and markers including Klf4/KLF4, Cd206/CD206, Tgm2/TGM2, Ccl17/CCL17, Ccl22/CCL22, and CCL24 were induced by MDI/MDI-GSH exposure in bronchoalveolar lavage cells (BALCs)/THP-1 macrophages. The expression of CD206, TGM2, CCL17, CCL22, and CCL24 are upregulated by 3.83-, 7.69-, 6.22-, 6.08-, and 1.90-fold in KLF4-overexpressed macrophages, respectively. Endogenous CD206 and TGM2 were downregulated by 1.65-5.17-fold, and 1.15-1.78-fold, whereas CCL17, CCL22, and CCL24 remain unchanged in KLF4-knockdown macrophages. Finally, MDI-glutathione (GSH) conjugate-treated macrophages show increased chemotactic ability to T-cells and eosinophils, which may be attenuated by KLF4 knockdown.Our data suggest that MDI exposure may induce M2 macrophage-associated markers partially through induction of KLF4.
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Affiliation(s)
- Chen-Chung Lin
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia, USA
| | - Brandon F Law
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia, USA
| | - Justin M Hettick
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia, USA
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Immune System Acts on Orthodontic Tooth Movement: Cellular and Molecular Mechanisms. BIOMED RESEARCH INTERNATIONAL 2022; 2022:9668610. [PMID: 36330460 PMCID: PMC9626206 DOI: 10.1155/2022/9668610] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 09/05/2022] [Accepted: 09/29/2022] [Indexed: 12/03/2022]
Abstract
Orthodontic tooth movement (OTM) is a tissue remodeling process based on orthodontic force loading. Compressed periodontal tissues have a complicated aseptic inflammatory cascade, which are considered the initial factor of alveolar bone remodeling. Since skeletal and immune systems shared a wide variety of molecules, osteoimmunology has been generally accepted as an interdisciplinary field to investigate their interactions. Unsurprisingly, OTM is considered a good mirror of osteoimmunology since it involves immune reaction and bone remolding. In fact, besides bone remodeling, OTM involves cementum resorption, soft tissue remodeling, orthodontic pain, and relapse, all correlated with immune cells and/or immunologically active substance. The aim of this paper is to review the interaction of immune system with orthodontic tooth movement, which helps gain insights into mechanisms of OTM and search novel method to short treatment period and control complications.
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Chen S, Yu L, Deng Y, Liu Y, Wang L, Li D, Yang K, Liu S, Tao A, Chen R. Early IL-17A Prevention Rather Than Late IL-17A Neutralization Attenuates Toluene Diisocyanate-Induced Mixed Granulocytic Asthma. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2022; 14:528-548. [PMID: 36174994 PMCID: PMC9523423 DOI: 10.4168/aair.2022.14.5.528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 06/10/2022] [Accepted: 07/05/2022] [Indexed: 06/16/2023]
Abstract
PURPOSE Interleukin (IL)-17A plays a critical role in the pathogenesis of allergic airway inflammation. Yet, the exact roles of IL-17A in asthma are still controversial. Thus, the aim of this study was to dissect the roles of IL-17A in toluene diisocyanate (TDI)-induced mixed granulocytic asthma and to assess the effects of neutralizing antibody in different effector phases on TDI-induced asthma. METHODS IL-17A functions in allergic airway inflammation were evaluated using mice deficient in IL-17A (Il17a-/-) or IL-17A monoclonal antibody (IL-17A mab, intraperitoneally, 50 μg per mouse, 100 μg per mouse). Moreover, the effects of exogenous recombinant IL (rIL)-17A in vivo (murine rIL-17A, intranasally, 1 μg per mouse) and in vitro (human rIL-17A, 100 ng/mL) were investigated. RESULTS TDI-induced mixed granulocytic airway inflammation was IL-17A-dependent because airway hyperreactivity, neutrophil and eosinophil infiltration, airway smooth muscle thickness, epithelium injury, dysfunctional T helper (Th) 2 and Th17 responses, granulocytic chemokine production and mucus overproduction were more markedly reduced in the Il17a-/- mice or by IL-17A neutralization during the sensitization phase of wild-type (WT) mice. By contrast, IL-17A neutralization during the antigen-challenge phase aggravated TDI-induced eosinophils recruitment, with markedly elevated Th2 response. In line with this, instillation of rIL-17 during antigen sensitization exacerbated airway inflammation by promoting neutrophils aggregation, while rIL-17A during the antigen-challenge phase protected the mice from TDI-induced airway eosinophilia. Moreover, rIL-17A exerted distinct effects on eosinophil- or neutrophil-related signatures in vitro. CONCLUSIONS Our data demonstrated that IL-17A was required for the initiation of TDI-induced asthma, but functioned as a negative regulator of established allergic inflammation, suggesting that early abrogation of IL-17A signaling, but not late IL-17A neutralization, may prevent the progression of TDI-induced asthma and could be used as a therapeutic strategy for severe asthmatics in clinical settings.
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Affiliation(s)
- Shuyu Chen
- Department of Pulmonary and Critical Care Medicine, Shenzhen Institute of Respiratory Diseases, Shenzhen Key Laboratory of Respiratory Diseases, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), First Affiliated Hospital of Southern University of Science and Technology (Shenzhen People's Hospital), Shenzhen, China
- Department of Pulmonary and Critical Care Medicine, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Li Yu
- Department of Pulmonary and Critical Care Medicine, Shenzhen Institute of Respiratory Diseases, Shenzhen Key Laboratory of Respiratory Diseases, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), First Affiliated Hospital of Southern University of Science and Technology (Shenzhen People's Hospital), Shenzhen, China
| | - Yao Deng
- Department of Pulmonary and Critical Care Medicine, Shenzhen Institute of Respiratory Diseases, Shenzhen Key Laboratory of Respiratory Diseases, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), First Affiliated Hospital of Southern University of Science and Technology (Shenzhen People's Hospital), Shenzhen, China
| | - Yuanyuan Liu
- Department of Pulmonary and Critical Care Medicine, Shenzhen Institute of Respiratory Diseases, Shenzhen Key Laboratory of Respiratory Diseases, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), First Affiliated Hospital of Southern University of Science and Technology (Shenzhen People's Hospital), Shenzhen, China
- Department of Pulmonary and Critical Care Medicine, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Lingwei Wang
- Department of Pulmonary and Critical Care Medicine, Shenzhen Institute of Respiratory Diseases, Shenzhen Key Laboratory of Respiratory Diseases, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), First Affiliated Hospital of Southern University of Science and Technology (Shenzhen People's Hospital), Shenzhen, China
| | - Difei Li
- Department of Pulmonary and Critical Care Medicine, Shenzhen Institute of Respiratory Diseases, Shenzhen Key Laboratory of Respiratory Diseases, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), First Affiliated Hospital of Southern University of Science and Technology (Shenzhen People's Hospital), Shenzhen, China
| | - Kai Yang
- Department of Pulmonary and Critical Care Medicine, Shenzhen Institute of Respiratory Diseases, Shenzhen Key Laboratory of Respiratory Diseases, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), First Affiliated Hospital of Southern University of Science and Technology (Shenzhen People's Hospital), Shenzhen, China
- Department of Pulmonary and Critical Care Medicine, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Shengming Liu
- Department of Pulmonary and Critical Care Medicine, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Ailin Tao
- The Second Affiliated Hospital, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, China.
| | - Rongchang Chen
- Department of Pulmonary and Critical Care Medicine, Shenzhen Institute of Respiratory Diseases, Shenzhen Key Laboratory of Respiratory Diseases, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), First Affiliated Hospital of Southern University of Science and Technology (Shenzhen People's Hospital), Shenzhen, China.
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Chen S, Chen Z, Deng Y, Zha S, Yu L, Li D, Liang Z, Yang K, Liu S, Chen R. Prevention of IL-6 signaling ameliorates toluene diisocyanate-induced steroid-resistant asthma. Allergol Int 2022; 71:73-82. [PMID: 34332882 DOI: 10.1016/j.alit.2021.07.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 06/11/2021] [Accepted: 06/16/2021] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Accumulating evidence indicated the crucial role for interleukin 6 (IL-6) signaling in the development of allergic asthma. Yet, the role of IL-6 signaling in toluene diisocyanate (TDI)-induced mixed granulocytic airway inflammation still remains unclear. Thus, the aims of this study were to dissect the role of IL-6 signaling and to evaluate the effect of tocilizumab on TDI-induced steroid-resistant asthma. METHODS TDI-induced asthma model was prepared and asthmatic mice were respectively given IL-6 monoclonal antibody, IL-6R monoclonal antibody (tocilizumab, 5 mg/kg, i.p. after each challenge) for therapeutic purposes or isotype IgG as control. RESULTS TDI exposure just elevated IL-6R expression in the infiltrated inflammatory cells around the airway, but increased glycoprotein 130 expression in the whole lung, especially in bronchial epithelium. Moreover, TDI inhalation increased airway hyperresponsiveness (AHR) to methacholine, coupled with mixed granulocytic inflammation, exaggerated epithelial denudation, airway smooth muscle thickening, goblet cell metaplasia, extensive submucosal collagen deposition, dysregulated Th2/Th17 responses, as well as innate immune responses and raised serum IgE. And almost all these responses except for raised serum IgE were markedly ameliorated by the administration of IL-6 neutralizing antibody or tocilizumab, but exhibited poor response to systemic steroid treatment. Also, TDI challenge induced nucleocytoplasm translocation of HMGB1 and promoted its release in the BALF, as well as elevated lung level of STAT3 phosphorylation, which were inhibited by anti-IL-6 and anti-IL-6R treatment. CONCLUSIONS Our data suggested that IL-6 monoclonal antibody and tocilizumab might effectively abrogate TDI-induced airway inflammation and remodeling, which could be used as a clinical potential therapy for patients with severe asthma.
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Mincham KT, Bruno N, Singanayagam A, Snelgrove RJ. Our evolving view of neutrophils in defining the pathology of chronic lung disease. Immunology 2021; 164:701-721. [PMID: 34547115 PMCID: PMC8561104 DOI: 10.1111/imm.13419] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 09/07/2021] [Accepted: 09/09/2021] [Indexed: 12/13/2022] Open
Abstract
Neutrophils are critical components of the body's immune response to infection, being loaded with a potent arsenal of toxic mediators and displaying immense destructive capacity. Given the potential of neutrophils to impart extensive tissue damage, it is perhaps not surprising that when augmented these cells are also implicated in the pathology of inflammatory diseases. Prominent neutrophilic inflammation is a hallmark feature of patients with chronic lung diseases such as chronic obstructive pulmonary disease, severe asthma, bronchiectasis and cystic fibrosis, with their numbers frequently associating with worse prognosis. Accordingly, it is anticipated that neutrophils are central to the pathology of these diseases and represent an attractive therapeutic target. However, in many instances, evidence directly linking neutrophils to the pathology of disease has remained somewhat circumstantial and strategies that have looked to reduce neutrophilic inflammation in the clinic have proved largely disappointing. We have classically viewed neutrophils as somewhat crude, terminally differentiated, insular and homogeneous protagonists of pathology. However, it is now clear that this does not do the neutrophil justice, and we now recognize that these cells exhibit heterogeneity, a pronounced awareness of the localized environment and a remarkable capacity to interact with and modulate the behaviour of a multitude of cells, even exhibiting anti-inflammatory, pro-resolving and pro-repair functions. In this review, we discuss evidence for the role of neutrophils in chronic lung disease and how our evolving view of these cells may impact upon our perceived assessment of their contribution to disease pathology and efforts to target them therapeutically.
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Affiliation(s)
- Kyle T. Mincham
- National Heart and Lung InstituteImperial College LondonLondonUK
| | - Nicoletta Bruno
- National Heart and Lung InstituteImperial College LondonLondonUK
| | - Aran Singanayagam
- National Heart and Lung InstituteImperial College LondonLondonUK
- Department of Infectious DiseaseImperial College LondonLondonUK
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Xu C, Chen S, Deng Y, Song J, Li J, Chen X, Chang P, Yao L, Tang H. Distinct roles of PI3Kδ and PI3Kγ in a toluene diisocyanate-induced murine asthma model. Toxicology 2021; 454:152747. [PMID: 33711354 DOI: 10.1016/j.tox.2021.152747] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 02/18/2021] [Accepted: 03/07/2021] [Indexed: 11/26/2022]
Abstract
TDI-induced asthma is characterized by neutrophil-dominated airway inflammation and often associated with poor responsiveness to steroid treatment. Both PI3Kδ and PI3Kγ have been demonstrated to play important proinflammatory roles in ovalbumin-induced asthma. We've already reported that blocking pan PI3K effectively attenuated TDI-induced allergic airway inflammation. Yet the specific functions of PI3Kδ and PI3Kγ in TDI-induced asthma are still unclear. Male BALB/c mice were first dermally sensitized and then challenged with TDI to generate an asthma model. Sellective inhibitors of PI3Kδ (IC-87114, AMG319) and PI3Kγ (AS252424, AS605240) were respectively given to the mice after each airway challenge. Treatment with IC-87114 or AMG319 after TDI exposure led to significantly decreased airway hyperresponsiveness (AHR), less neutrophil and eosinophil accumulation, attenuated airway smooth muscle (ASM) thickening, less M1 and M2 macrophages in lung, as well as lower levels of IL-4, IL-5, IL-6 and IL-18 in bronchoalveolar lavage fluid (BALF) and recovered IL-10 production. While mice treated with AS252424 or AS605240 had increased AHR, more severe ASM thickening, larger numbers of neutrophils and eosinophils, more M1 but less M2 macrophages, and higher BALF levels of IL-4, IL-5, IL-6, IL-10, IL-12, IL-18 when compared with those treated with vehicle. These data revealed that pharmacological inhibition of PI3Kδ attenuates TDI-induced airway inflammation while PI3Kγ inhibition exacerbates TDI-induced asthma, indicating distinct biological functions of PI3Kδ and PI3Kγ in TDI-induced asthma.
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Affiliation(s)
- Caiyun Xu
- Department of Critical Care Medicine, Lianyungang First People's Hospital, Affiliated Hospital of Xuzhou Medical College, Lianyungang, China
| | - Shuyu Chen
- Department of Pulmonary and Critical Care Medicine, Shenzhen Institute of Respiratory Diseases, Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, China; The First Affiliated Hospital, Jinan University, Guangzhou, China
| | - Yao Deng
- The Second Affiliated Hospital, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, China
| | - Jiafu Song
- Department of Respiratory and Critical Care Medicine, Lianyungang First People's Hospital, Affiliated Hospital of Xuzhou Medical College, Lianyungang, China
| | - Jiahui Li
- Department of Pulmonary and Critical Care Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Xin Chen
- Department of Pulmonary and Critical Care Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Ping Chang
- Department of Critical Care Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Lihong Yao
- State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China.
| | - Haixiong Tang
- Department of Critical Care Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China.
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Blomme EE, Provoost S, Bazzan E, Van Eeckhoutte HP, Roffel MP, Pollaris L, Bontinck A, Bonato M, Vandenbroucke L, Verhamme F, Joos GF, Cosio MG, Vanoirbeek JAJ, Brusselle GG, Saetta M, Maes T. Innate lymphoid cells in isocyanate-induced asthma: role of microRNA-155. Eur Respir J 2020; 56:13993003.01289-2019. [PMID: 32499335 DOI: 10.1183/13993003.01289-2019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 05/10/2020] [Indexed: 11/05/2022]
Abstract
BACKGROUND Occupational asthma, induced by workplace exposures to low molecular weight agents such as toluene 2,4-diisocyanate (TDI), causes a significant burden to patients and society. Little is known about innate lymphoid cells (ILCs) in TDI-induced asthma. A critical regulator of ILC function is microRNA-155, a microRNA associated with asthma. OBJECTIVE To determine whether TDI exposure modifies the number of ILCs in the lung and whether microRNA-155 contributes to TDI-induced airway inflammation and hyperresponsiveness. METHODS C57BL/6 wild-type and microRNA-155 knockout mice were sensitised and challenged with TDI or vehicle. Intracellular cytokine expression in ILCs and T-cells was evaluated in bronchoalveolar lavage (BAL) fluid using flow cytometry. Peribronchial eosinophilia and goblet cells were evaluated on lung tissue, and airway hyperresponsiveness was measured using the forced oscillation technique. Putative type 2 ILCs (ILC2) were identified in bronchial biopsies of subjects with TDI-induced occupational asthma using immunohistochemistry. Human bronchial epithelial cells were exposed to TDI or vehicle. RESULTS TDI-exposed mice had higher numbers of airway goblet cells, BAL eosinophils, CD4+ T-cells and ILCs, with a predominant type 2 response, and tended to have airway hyperresponsiveness. In TDI-exposed microRNA-155 knockout mice, inflammation and airway hyperresponsiveness were attenuated. TDI exposure induced IL-33 expression in human bronchial epithelial cells and in murine lungs, which was microRNA-155 dependent in mice. GATA3+CD3- cells, presumably ILC2, were present in bronchial biopsies. CONCLUSION TDI exposure is associated with increased numbers of ILCs. The proinflammatory microRNA-155 is crucial in a murine model of TDI asthma, suggesting its involvement in the pathogenesis of occupational asthma due to low molecular weight agents.
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Affiliation(s)
- Evy E Blomme
- Dept of Respiratory Medicine, Laboratory for Translational Research in Obstructive Pulmonary Diseases, Ghent University Hospital, Ghent, Belgium
| | - Sharen Provoost
- Dept of Respiratory Medicine, Laboratory for Translational Research in Obstructive Pulmonary Diseases, Ghent University Hospital, Ghent, Belgium
| | - Erica Bazzan
- Dept of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - Hannelore P Van Eeckhoutte
- Dept of Respiratory Medicine, Laboratory for Translational Research in Obstructive Pulmonary Diseases, Ghent University Hospital, Ghent, Belgium
| | - Mirjam P Roffel
- Dept of Respiratory Medicine, Laboratory for Translational Research in Obstructive Pulmonary Diseases, Ghent University Hospital, Ghent, Belgium.,University of Groningen, University Medical Center Groningen, GRIAC (Groningen Research Institute for Asthma and COPD), Groningen, The Netherlands
| | - Lore Pollaris
- Centre for Environment and Health, KU Leuven, Leuven, Belgium
| | - Annelies Bontinck
- Dept of Respiratory Medicine, Laboratory for Translational Research in Obstructive Pulmonary Diseases, Ghent University Hospital, Ghent, Belgium
| | - Matteo Bonato
- Dept of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - Louise Vandenbroucke
- Dept of Respiratory Medicine, Laboratory for Translational Research in Obstructive Pulmonary Diseases, Ghent University Hospital, Ghent, Belgium
| | - Fien Verhamme
- Dept of Respiratory Medicine, Laboratory for Translational Research in Obstructive Pulmonary Diseases, Ghent University Hospital, Ghent, Belgium
| | - Guy F Joos
- Dept of Respiratory Medicine, Laboratory for Translational Research in Obstructive Pulmonary Diseases, Ghent University Hospital, Ghent, Belgium
| | - Manuel G Cosio
- Dept of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padova, Padova, Italy.,Meakins Christie Laboratories, Respiratory Division, McGill University, Montreal, QC, Canada
| | | | - Guy G Brusselle
- Dept of Respiratory Medicine, Laboratory for Translational Research in Obstructive Pulmonary Diseases, Ghent University Hospital, Ghent, Belgium
| | - Marina Saetta
- Dept of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - Tania Maes
- Dept of Respiratory Medicine, Laboratory for Translational Research in Obstructive Pulmonary Diseases, Ghent University Hospital, Ghent, Belgium
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Chen S, Yao L, Huang P, He Q, Guan H, Luo Y, Zou Z, Wei S, Peng G, Yan J, Chen R, Zhang Q, Tao A. Blockade of the NLRP3/Caspase-1 Axis Ameliorates Airway Neutrophilic Inflammation in a Toluene Diisocyanate-Induced Murine Asthma Model. Toxicol Sci 2020; 170:462-475. [PMID: 31070765 DOI: 10.1093/toxsci/kfz099] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Multiple studies have addressed the vital role of Nod-like receptor protein 3(NLRP3)/caspase-1/IL-1β signaling in asthma. Yet, the role of NLRP3/caspase-1 in toluene diisocyanate (TDI)-induced asthma is still obscure. The aim of this study is to investigate the role of the NLRP3/caspase-1 axis in TDI-induced asthma. Using an established murine model of TDI-induced asthma as described previously, we gave the asthmatic mice a highly selective NLRP3 inhibitor, MCC950, as well as the specific caspase-1 inhibitors VX-765 and Ac-YVAD-CHO for therapeutic purposes. Airway resistance was measured and bronchoalveolar lavage fluid was analyzed. Lungs were examined by histology, immunohistochemistry, Western blotting, and flow cytometry. TDI exposure elevated the expression of NLRP3 and caspase-1 that was coupled with increased airway hyperresponsiveness (AHR), neutrophil-dominated cell infiltration, pronounced goblet cell metaplasia, extensive collagen deposition, and increased TH2/TH17 responses. Both VX-765 and Ac-YVAD-CHO effectively inhibited the activation of caspase-1 in TDI-asthmatic mice that was accompanied by dramatic attenuation of AHR, airway inflammation, and airway remodeling, in addition to a decreased TH2 response and lower levels of IL-18 and IL-1β. MCC950 blocked the activation of NLRP3 and downregulated protein expression of caspase-1, IL-1β, and IL-18 in TDI-exposed mice. Furthermore, MCC950 remarkably alleviated AHR, airway inflammation, airway remodeling, and significantly suppressed TH2/TH17 responses. These findings suggested that blockade of the NLRP3/caspase-1 axis effectively prevents the progression of TDI-induced asthma and could be used as therapeutic targets for asthmatics.
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Affiliation(s)
- Shuyu Chen
- The Second Affiliated Hospital, State Key Laboratory of Respiratory Disease, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, Guangzhou Medical University, Guangzhou 510260, China.,Center for Immunology, Inflammation & Immune-Mediated Disease, Guangzhou Medical University
| | - Lihong Yao
- State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University
| | - Peikai Huang
- State Key Laboratory of Respiratory Diseases, Department of Allergy and Clinical Immunology, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510180, China
| | - Qiaoling He
- The Second Affiliated Hospital, State Key Laboratory of Respiratory Disease, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, Guangzhou Medical University, Guangzhou 510260, China.,Center for Immunology, Inflammation & Immune-Mediated Disease, Guangzhou Medical University
| | - Hongbing Guan
- The Second Affiliated Hospital, State Key Laboratory of Respiratory Disease, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, Guangzhou Medical University, Guangzhou 510260, China.,Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou, 510140, China
| | - Yiqin Luo
- The Second Affiliated Hospital, State Key Laboratory of Respiratory Disease, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, Guangzhou Medical University, Guangzhou 510260, China.,Center for Immunology, Inflammation & Immune-Mediated Disease, Guangzhou Medical University
| | - Zehong Zou
- The Second Affiliated Hospital, State Key Laboratory of Respiratory Disease, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, Guangzhou Medical University, Guangzhou 510260, China.,Center for Immunology, Inflammation & Immune-Mediated Disease, Guangzhou Medical University
| | - Shushan Wei
- State Key Laboratory of Respiratory Diseases, Department of Allergy and Clinical Immunology, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510180, China
| | - Guoyou Peng
- State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University
| | - Jie Yan
- The Second Affiliated Hospital, State Key Laboratory of Respiratory Disease, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, Guangzhou Medical University, Guangzhou 510260, China.,Center for Immunology, Inflammation & Immune-Mediated Disease, Guangzhou Medical University
| | - Rongchang Chen
- State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University
| | - Qingling Zhang
- State Key Laboratory of Respiratory Diseases, Department of Allergy and Clinical Immunology, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510180, China
| | - Ailin Tao
- The Second Affiliated Hospital, State Key Laboratory of Respiratory Disease, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, Guangzhou Medical University, Guangzhou 510260, China.,Center for Immunology, Inflammation & Immune-Mediated Disease, Guangzhou Medical University
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10
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Chen R, Zhang Q, Chen S, Tang H, Huang P, Wei S, Liang Z, Chen X, Tao A, Yao L. IL-17F, rather than IL-17A, underlies airway inflammation in a steroid-insensitive toluene diisocyanate-induced asthma model. Eur Respir J 2019; 53:13993003.01510-2018. [PMID: 30655284 DOI: 10.1183/13993003.01510-2018] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 01/06/2019] [Indexed: 12/20/2022]
Abstract
Steroid insensitivity constitutes a major problem for asthma management. Toluene diisocyanate (TDI) is one of the leading allergens of asthma that induces both T-helper Th2 and Th17 responses, and is often associated with poor responsiveness to steroid treatment in the clinic.We sought to evaluate the effects of inhaled and systemic steroids on a TDI-induced asthma model and to find how interleukin (IL)-17A and IL-17F function in this model. BALB/c mice were exposed to TDI for generating an asthma model and were treated with inhaled fluticasone propionate, systemic prednisone, anti-IL-17A, anti-IL-17F, recombinant IL-17A or IL-17F.Both fluticasone propionate and prednisone showed no effects on TDI-induced airway hyperresponsiveness (AHR), bronchial neutrophilia and eosinophilia, and epithelial goblet cell metaplasia. TDI-induced Th2 and Th17 signatures were not suppressed by fluticasone propionate or prednisone. Treatment with anti-IL-17A after TDI exposure led to increased AHR, aggravated mucus production and airway eosinophil recruitment, accompanied by amplified Th2 responses, whereas anti-IL-17F ameliorated TDI-induced AHR and airway neutrophilia, with decreased Th17 responses. Recombinant IL-17A and IL-17F showed opposite effects to the monoclonal antibodies.IL-17A and IL-17F exert distinct biological effects during airway inflammation of a TDI-induced asthma model, which is unresponsive to both inhaled and systemic steroids.
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Affiliation(s)
- Rongchang Chen
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China.,These authors contributed equally to this work
| | - Qingling Zhang
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China.,These authors contributed equally to this work
| | - Shuyu Chen
- Guangdong Provincial Key Laboratory of Allergy and Clinical Immunology, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China.,These authors contributed equally to this work
| | - Haixiong Tang
- Dept of Respiratory Medicine, Minzu Hospital of Guangxi Zhuang Autonomous Region, Guangxi Medical University, Nanning, China.,These authors contributed equally to this work
| | - Peikai Huang
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China
| | - Shushan Wei
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China
| | - Zhenyu Liang
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China
| | - Xin Chen
- Dept of Respiratory Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Ailin Tao
- Guangdong Provincial Key Laboratory of Allergy and Clinical Immunology, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China
| | - Lihong Yao
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China
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11
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Yee MC, Nichols HL, Polley D, Saifeddine M, Pal K, Lee K, Wilson EH, Daines MO, Hollenberg MD, Boitano S, DeFea KA. Protease-activated receptor-2 signaling through β-arrestin-2 mediates Alternaria alkaline serine protease-induced airway inflammation. Am J Physiol Lung Cell Mol Physiol 2018; 315:L1042-L1057. [PMID: 30335499 PMCID: PMC6337008 DOI: 10.1152/ajplung.00196.2018] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 08/06/2018] [Accepted: 08/22/2018] [Indexed: 01/01/2023] Open
Abstract
Alternaria alternata is a fungal allergen associated with severe asthma and asthma exacerbations. Similarly to other asthma-associated allergens, Alternaria secretes a serine-like trypsin protease(s) that is thought to act through the G protein-coupled receptor protease-activated receptor-2 (PAR2) to induce asthma symptoms. However, specific mechanisms underlying Alternaria-induced PAR2 activation and signaling remain ill-defined. We sought to determine whether Alternaria-induced PAR2 signaling contributed to asthma symptoms via a PAR2/β-arrestin signaling axis, identify the protease activity responsible for PAR2 signaling, and determine whether protease activity was sufficient for Alternaria-induced asthma symptoms in animal models. We initially used in vitro models to demonstrate Alternaria-induced PAR2/β-arrestin-2 signaling. Alternaria filtrates were then used to sensitize and challenge wild-type, PAR2-/- and β-arrestin-2-/- mice in vivo. Intranasal administration of Alternaria filtrate resulted in a protease-dependent increase of airway inflammation and mucin production in wild-type but not PAR2-/- or β-arrestin-2-/- mice. Protease was isolated from Alternaria preparations, and select in vitro and in vivo experiments were repeated to evaluate sufficiency of the isolated Alternaria protease to induce asthma phenotype. Administration of a single isolated serine protease from Alternaria, Alternaria alkaline serine protease (AASP), was sufficient to fully activate PAR2 signaling and induce β-arrestin-2-/--dependent eosinophil and lymphocyte recruitment in vivo. In conclusion, Alternaria filtrates induce airway inflammation and mucus hyperplasia largely via AASP using the PAR2/β-arrestin signaling axis. Thus, β-arrestin-biased PAR2 antagonists represent novel therapeutic targets for treating aeroallergen-induced asthma.
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Affiliation(s)
- Michael C Yee
- Biomedical Sciences, Graduate Program, University of California Riverside , Riverside, California
| | - Heddie L Nichols
- Biomedical Sciences, Graduate Program, University of California Riverside , Riverside, California
| | - Danny Polley
- Cumming School of Medicine, Department of Physiology and Pharmacology and Department of Medicine, University of Calgary , Calgary, Alberta , Canada
| | - Mahmoud Saifeddine
- Cumming School of Medicine, Department of Physiology and Pharmacology and Department of Medicine, University of Calgary , Calgary, Alberta , Canada
| | - Kasturi Pal
- Biomedical Sciences, Graduate Program, University of California Riverside , Riverside, California
- Cell Molecular and Developmental Biology and Biochemistry Graduate Program, University of California Riverside , Riverside, California
| | - Kyu Lee
- Biomedical Sciences, Graduate Program, University of California Riverside , Riverside, California
- Molecular Biology Graduate Program, University of California Riverside , Riverside, California
| | - Emma H Wilson
- Biomedical Sciences, Graduate Program, University of California Riverside , Riverside, California
| | - Michael O Daines
- Department of Pediatrics, University of Arizona Health Sciences , Tucson, Arizona
- Asthma and Airway Disease Research Center, University of Arizona Health Sciences , Tucson, Arizona
| | - Morley D Hollenberg
- Cumming School of Medicine, Department of Physiology and Pharmacology and Department of Medicine, University of Calgary , Calgary, Alberta , Canada
| | - Scott Boitano
- Asthma and Airway Disease Research Center, University of Arizona Health Sciences , Tucson, Arizona
- Department of Physiology, University of Arizona Health Sciences , Tucson, Arizona
| | - Kathryn A DeFea
- Biomedical Sciences, Graduate Program, University of California Riverside , Riverside, California
- Cell Molecular and Developmental Biology and Biochemistry Graduate Program, University of California Riverside , Riverside, California
- Molecular Biology Graduate Program, University of California Riverside , Riverside, California
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12
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Snelgrove RJ, Patel DF, Patel T, Lloyd CM. The enigmatic role of the neutrophil in asthma: Friend, foe or indifferent? Clin Exp Allergy 2018; 48:1275-1285. [PMID: 29900603 DOI: 10.1111/cea.13191] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Whilst severe asthma has classically been categorized as a predominantly Th2-driven pathology, there has in recent years been a paradigm shift with the realization that it is a heterogeneous disease that may manifest with quite disparate underlying inflammatory and remodelling profiles. A subset of asthmatics, particularly those with a severe, corticosteroid refractory disease, present with a prominent neutrophilic component. Given the potential of neutrophils to impart extensive tissue damage and promote inflammation, it has been anticipated that these cells are closely implicated in the underlying pathophysiology of severe asthma. However, uncertainty persists as to why the neutrophil is present in the asthmatic lung and what precisely it is doing there, with evidence supporting its role as a protagonist of pathology being primarily circumstantial. Furthermore, our view of the neutrophil as a primitive, indiscriminate killer has evolved with the realization that neutrophils can exhibit a marked anti-inflammatory, pro-resolving and wound healing capacity. We suggest that the neutrophil likely exhibits pleiotropic and potentially conflicting roles in defining asthma pathophysiology-some almost certainly detrimental and some potentially beneficial-with context, timing and location all critical confounders. Accordingly, indiscriminate blockade of neutrophils with a broad sword approach is unlikely to be the answer, but rather we should first seek to understand their complex and multifaceted roles in the disease state and then target them with the same subtleties and specificity that they themselves exhibit.
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Affiliation(s)
- R J Snelgrove
- Inflammation Repair and Development Section, National Heart and Lung Institute, Imperial College London, London, UK
| | - D F Patel
- Inflammation Repair and Development Section, National Heart and Lung Institute, Imperial College London, London, UK
| | - T Patel
- Inflammation Repair and Development Section, National Heart and Lung Institute, Imperial College London, London, UK
| | - C M Lloyd
- Inflammation Repair and Development Section, National Heart and Lung Institute, Imperial College London, London, UK
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13
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Vanheule V, Crijns H, Poosti F, Ruytinx P, Berghmans N, Gerlza T, Ronsse I, Pörtner N, Matthys P, Kungl AJ, Opdenakker G, Struyf S, Proost P. Anti-inflammatory effects of the GAG-binding CXCL9(74-103) peptide in dinitrofluorobenzene-induced contact hypersensitivity in mice. Clin Exp Allergy 2018; 48:1333-1344. [DOI: 10.1111/cea.13227] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 06/14/2018] [Accepted: 07/02/2018] [Indexed: 12/21/2022]
Affiliation(s)
- Vincent Vanheule
- Laboratory of Molecular Immunology; Department of Microbiology and Immunology; Rega Institute for Medical Research; KU Leuven; Leuven Belgium
| | - Helena Crijns
- Laboratory of Molecular Immunology; Department of Microbiology and Immunology; Rega Institute for Medical Research; KU Leuven; Leuven Belgium
| | - Fariba Poosti
- Laboratory of Molecular Immunology; Department of Microbiology and Immunology; Rega Institute for Medical Research; KU Leuven; Leuven Belgium
| | - Pieter Ruytinx
- Laboratory of Molecular Immunology; Department of Microbiology and Immunology; Rega Institute for Medical Research; KU Leuven; Leuven Belgium
| | - Nele Berghmans
- Laboratory of Molecular Immunology; Department of Microbiology and Immunology; Rega Institute for Medical Research; KU Leuven; Leuven Belgium
| | - Tanja Gerlza
- Department of Pharmaceutical Chemistry; Institute of Pharmaceutical Sciences; University of Graz; Graz Austria
- Antagonis Biotherapeutics GmbH; Graz Austria
| | - Isabelle Ronsse
- Laboratory of Molecular Immunology; Department of Microbiology and Immunology; Rega Institute for Medical Research; KU Leuven; Leuven Belgium
| | - Noëmie Pörtner
- Laboratory of Molecular Immunology; Department of Microbiology and Immunology; Rega Institute for Medical Research; KU Leuven; Leuven Belgium
| | - Patrick Matthys
- Laboratory of Immunobiology; Department of Microbiology and Immunology; Rega Institute for Medical Research; KU Leuven; Leuven Belgium
| | - Andreas J. Kungl
- Department of Pharmaceutical Chemistry; Institute of Pharmaceutical Sciences; University of Graz; Graz Austria
- Antagonis Biotherapeutics GmbH; Graz Austria
| | - Ghislain Opdenakker
- Laboratory of Immunobiology; Department of Microbiology and Immunology; Rega Institute for Medical Research; KU Leuven; Leuven Belgium
| | - Sofie Struyf
- Laboratory of Molecular Immunology; Department of Microbiology and Immunology; Rega Institute for Medical Research; KU Leuven; Leuven Belgium
| | - Paul Proost
- Laboratory of Molecular Immunology; Department of Microbiology and Immunology; Rega Institute for Medical Research; KU Leuven; Leuven Belgium
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14
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Wang Y, Le Y, Zhao W, Lin Y, Wu Y, Yu C, Xiong J, Zou F, Dong H, Cai S, Zhao H. Short Thymic Stromal Lymphopoietin Attenuates Toluene Diisocyanate-induced Airway Inflammation and Inhibits High Mobility Group Box 1-Receptor for Advanced Glycation End Products and Long Thymic Stromal Lymphopoietin Expression. Toxicol Sci 2018; 157:276-290. [PMID: 28329851 DOI: 10.1093/toxsci/kfx043] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Short thymic stromal lymphopoietin (short TSLP), one of TSLP variants, exerts anti-inflammatory activities in endotoxin shock and colitis mouse models. Our latest work reported that short TSLP prevented house dust mite-induced epithelial barrier disruption. Yet the role of short TSLP in toluene diisocyanate (TDI)-induced asthma is unknown. Male BALB/c mice were sensitized and challenged with TDI to generate a chemical-induced asthma model. Synthetic short TSLP peptides were given intranasally or intraperitoneally before each challenge. TDI significantly increased inflammation and hyperresponsiveness of airway, which were suppressed by short TSLP treatment. Levels of mouse TSLP, high mobility group box 1 (HMGB1), and receptor for advanced glycation end products (RAGE) in airway epithelium and whole lung tissues were markedly increased in TDI group compared with control mice, which were decreased after administration of short TSLP. Meanwhile, short TSLP also inhibited STAT5(Y694) phosphorylation, which was highly expressed in airways of TDI-exposure mice. In vitro, both TDI-human serum albumin (HSA) and recombinant human (rh) HMGB1 promoted long TSLP but not short TSLP gene production in human bronchial epithelial cells (16HBE). Cells pre-treated with short TSLP exhibited less expression of RAGE and long TSLP and lower phosphorylation of Akt(S473), p38 MAPK(T180/Y182), and STAT5(Y694) than stimulated with TDI-HSA or rhHMGB1 alone. Results suggest that short TSLP prevents airway inflammation in a chemical-induced asthma model, which might be associated with the inhibitions of HMGB1-RAGE and long TSLP expression and STAT5(Y694) phosphorylation.
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Affiliation(s)
- Yanhong Wang
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yanqing Le
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Wenqu Zhao
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yun Lin
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yue Wu
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Changhui Yu
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Jing Xiong
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Fei Zou
- School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, China
| | - Hangming Dong
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Shaoxi Cai
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Haijin Zhao
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
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15
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Ollé‐Monge M, Cruz M, Gomez‐Ollés S, Ojanguren I, Vanoirbeek J, Muñoz X. Effect of anti-IgE in occupational asthma caused by exposure to low molecular weight agents. Allergy 2017; 72:1720-1727. [PMID: 28439933 DOI: 10.1111/all.13190] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/19/2017] [Indexed: 12/11/2022]
Abstract
BACKGROUND The role of immunoglobulin (Ig)-E in occupational asthma (OA) due to low molecular weight (LMW) agents is not well established compared to classical atopic asthma. In this study, we evaluate whether anti-IgE monoclonal antibody (mAb) has an effect in a mouse model of OA, using persulfate salts. METHODS On days 1 and 8, BALB/C mice were dermally sensitized with 5% ammonium persulfate (AP) or dimethyl sulfoxide (DMSO). On days 15, 18, and 21, animals were injected intraperitoneally with anti-IgE mAb or PBS 6 hours before challenge with AP or saline. Airway hyper-responsiveness (AHR) using a methacholine test, airway inflammation in bronchoalveolar lavage (BAL) and lung tissue, and total free IgE in serum samples were analyzed 24, 48, and 96 hours after the last challenge. RESULTS Anti-IgE mAb treatment almost completely neutralized free serum IgE. In AP-sensitized and challenged mice, anti-IgE mAb treatment abolished AHR 24 hour and 48 hour after the last challenge and significantly reduced the total number of eosinophils and neutrophils 48 hour and 96 hour after the last AP challenge compared with nontreated mice. Levels of interleukin (IL)-13 in BAL were also significantly decreased after anti-IgE administration 24 hour and 48 hour after the last AP challenge. Histological analysis of the lung sections from anti-IgE-treated mice revealed normal inflammatory patterns similar to control groups 48 hour after the last challenge. CONCLUSIONS Anti-IgE-treated mice showed a significant improvement in asthma features related to the AHR and airway inflammation. Anti-IgE mAb has positive effects in OA induced by persulfate salts.
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Affiliation(s)
- M. Ollé‐Monge
- Servicio de Neumologia Hospital Universitario Vall d'Hebron Barcelona Spain
- CIBER Enfermedades Respiratorias (CibeRes) Barcelona Spain
- Departament de Medicina Universitat Autònoma de Barcelona Barcelona Spain
| | - M.J. Cruz
- Servicio de Neumologia Hospital Universitario Vall d'Hebron Barcelona Spain
- CIBER Enfermedades Respiratorias (CibeRes) Barcelona Spain
- Departament de Medicina Universitat Autònoma de Barcelona Barcelona Spain
| | - S. Gomez‐Ollés
- Servicio de Neumologia Hospital Universitario Vall d'Hebron Barcelona Spain
- CIBER Enfermedades Respiratorias (CibeRes) Barcelona Spain
- Departament de Medicina Universitat Autònoma de Barcelona Barcelona Spain
| | - I. Ojanguren
- Servicio de Neumologia Hospital Universitario Vall d'Hebron Barcelona Spain
- CIBER Enfermedades Respiratorias (CibeRes) Barcelona Spain
- Departament de Medicina Universitat Autònoma de Barcelona Barcelona Spain
| | - J. Vanoirbeek
- Department of Public Health and Primary Care Centre for Environment and Health KU Leuven Leuven Belgium
| | - X. Muñoz
- Servicio de Neumologia Hospital Universitario Vall d'Hebron Barcelona Spain
- CIBER Enfermedades Respiratorias (CibeRes) Barcelona Spain
- Departament de Medicina Universitat Autònoma de Barcelona Barcelona Spain
- Department of Cell Biology Physiology and Immunology Universitat Autònoma de Barcelona Barcelona Spain
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16
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Li W, Dong H, Zhao H, Song J, Tang H, Yao L, Liu L, Tong W, Zou M, Zou F, Cai S. 1,25-Dihydroxyvitamin D3 prevents toluene diisocyanate-induced airway epithelial barrier disruption. Int J Mol Med 2015; 36:263-70. [PMID: 25998793 DOI: 10.3892/ijmm.2015.2214] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Accepted: 05/05/2015] [Indexed: 11/05/2022] Open
Abstract
The loss of airway epithelial integrity contributes significantly to asthma pathogenesis. Evidence suggests that vitamin D plays an important role in the prevention and treatment of asthma. However, its role in airway epithelial barrier function remains uncertain. We have previously demonstrated impaired epithelial junctions in a model of toluene diisocyanate (TDI)-induced asthma. In the present study, we hypothesized that 1,25-dihydroxyvitamin D3 [1,25(OH)2D3] may prevent TDI-induced epithelial barrier disruption. Male BALB/c mice were dermally sensitized and then challenged with TDI. The mice were then administered 1,25(OH)2D3 intraperitoneally prior to challenge with TDI. For in vitro experiments, 16HBE bronchial epithelial cells were cultured and stimulated with TDI-human serum albumin (HSA). The results revealed that the mice treated with 1,25(OH)2D3 displayed decreased airway hyperresponsiveness (AHR), suppressed neutrophil and eosinophil infiltration into the airways, as well as an increased E-cadherin and zonula occludens-1 (ZO-1) expression at the cell-cell contact sites. In vitro, exposure of the cells to TDI-HSA induced a rapid decline in transepithelial electrical resistance (TER) and an increase in cell permeability, followed by a decrease in occludin expression and the redistribution of E-cadherin, accompanied by a significant upregulation in the levels of phosphorylated extracellular signal-regulated kinase (ERK)1/2. These effects were all partly reversed by treatment with either 1,25(OH)2D3 or an ERK1/2 inhibitor. In conclusion, the findings of our study demonstrate that 1,25(OH)2D3 prevents TDI-induced epithelial barrier disruption, and that the ERK1/2 pathway may play a role in this process.
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Affiliation(s)
- Wenjia Li
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Hangming Dong
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Haijin Zhao
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Jiafu Song
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Haixiong Tang
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Lihong Yao
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Laiyu Liu
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Wancheng Tong
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Mengchen Zou
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Fei Zou
- School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Shaoxi Cai
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
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Pauluhn J. Analysis of the interrelationship of the pulmonary irritation and elicitation thresholds in rats sensitized with 1,6-hexamethylene diisocyanate (HDI). Inhal Toxicol 2015; 27:191-206. [PMID: 25924102 PMCID: PMC4496806 DOI: 10.3109/08958378.2015.1026619] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
This paper summarizes a range of experimental data central for developing a science-based approach for hazard identification of monomeric and polymeric aliphatic 1,6-hexamethylene diisocyanate (HDI). The dose–response curve of HDI-induced pulmonary responses in naïve or dermally sensitized rats after one or several inhalation priming exposures was examined in the Brown Norway (BN) rat asthma model. Emphasis was directed to demonstrate the need and the difficulty in selecting an appropriate pulmonary dose when much of the inhaled chemically reactive vapor may concentration dependently be retained in the upper airways of obligate nose-breathing rats. The course taken acknowledges the experimental challenges in identifying an elicitation threshold for HDI-monomer near or above the saturated vapor concentration or in the presence of a HDI-polymer aerosol. The inhalation threshold dose on elicitation was determined based on a fixed concentration (C) × variable exposure duration (t) protocol for improving inhalation dosimetry of the lower airways. Neutrophilic granulocytes (PMN) in bronchoalveolar lavage (BAL) fluid in equally inhalation primed naïve and dermally sensitized rats were used to define the inhalation elicitation threshold C × t. Sensitized rats elaborated markedly increased PMN challenged sensitized rats relative to equally challenged naïve rats at 5625 mg HDI/m3 × min (75 mg/m3 for 75 min). PMN were essentially indistinguishable at 900 mg HDI/m3 × min. By applying adjustment factors accounting for both inter-species differences in inhalation dosimetry and intra-species susceptibility, the workplace human-equivalent threshold C × t was estimated to be in the range of the current ACGIH TLV® of HDI. Thus, this rat “asthma” model was suitable to demonstrate elicitation thresholds for HDI-vapor after one or several inhalation priming exposures and seems to be suitable to derive occupational exposure values (OELs) for diisocyanates in general.
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Affiliation(s)
- Jürgen Pauluhn
- Bayer Pharma AG, Experimental Toxicology , Wuppertal , Germany (retired) and
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Abstract
PURPOSE OF REVIEW This review aims to update the knowledge on the burden of disease due to exposure to isocyanates. Health effects of isocyanates and their major products, polyurethanes, are mainly determined by sensitization to isocyanates. Recent studies on the genetic factors to explain individual susceptibility to sensitization are reviewed. RECENT FINDINGS Production of isocyanates has rapidly increased in the past and is predicted to increase at an annual rate of around 5%. Consumer products and the construction area are the main drivers of growth. This leads to increased nonoccupational exposure. The use of sprayed polyurethane foams for insulation in existing homes is one such example of nonoccupational exposure. The percentage of people exposed who show health effects is not known. Occupational exposure increases are mainly caused by the increase in the workforce. The percentage of workers exhibiting health effects remained fairly stable at 5-15% in the last decade. To explain why not all people exposed to isocyanates develop adverse health effects, recent findings on sensitization to isocyanate are reviewed. The skin is the most important route for sensitization. SUMMARY Increased production of isocyanates and rising use of these substances in consumer products is leading to an increased burden of disease, with an increase in nonoccupational exposure as well. Sensitization to isocyanates is the main route for adverse health effects. The skin is the major route for sensitization. Recently, several genetic factors have been identified that play a role in the individual susceptibility for sensitization.
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Luo QL, Nurahmat M, Li MH, Sun J, Chen MX, Liu F, Wei Y, Dong JC. Pharmacological investigation of a HPLC/MS standardized three herbal extracts containing formulae (Bu-Shen-Yi-Qi-Tang) on airway inflammation and hypothalamic-pituitary-adrenal axis activity in asthmatic mice. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2014; 21:1439-1450. [PMID: 25022211 DOI: 10.1016/j.phymed.2014.06.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2013] [Revised: 04/21/2014] [Accepted: 06/16/2014] [Indexed: 06/03/2023]
Abstract
Bu-Shen-Yi-Qi-Tang (BSYQT) which is prescribed on the basis of clinical experience is commonly used in clinic of traditional Chinese medicine (TCM) for asthma treatment. The components of BSYQT include Radix Astragali (RA), Herba Epimedii (HE) and Radix Rehmanniae (RR). The aim of this study was to screen extracts of BSYQT with best anti-inflammatory activity in asthmatic mice, and separate and identify the chemical compounds in them. Our results suggested that 60% ethanol extract of herbs (H60) and granules (G60) of BSYQT were the two extracts with best anti-inflammatory activity and effects of H60 were a little better than that of G60. High-performance liquid chromatography coupled to electrospray ionization and quadrupole time-of-flight mass spectrometry (HPLC-ESI-Q-TOF-MS/MS) analysis of the major chemical compounds of H60 and G60 revealed that 56 and 42 peaks were identified separately in H60 and G60. Further analysis revealed that 38 compounds were identified shared by H60 and G60, and 18 compounds were only in H60. There were 25 compounds in HE, 6 compounds in RR and 7 compounds in RA in the 38 compounds shared by G60 and H60. These 38 chemical components were tentatively considered the material basis of the anti-inflammatory activity of G60 and H60. The differences in the amount of the 38 chemical components as well as the 18 chemical components only in H60 were tentatively considered responsible for the activity differences between H60 and G60. In conclusion, these results suggested that extracts of BSYQT had inhibitory effects on airway inflammation in asthmatic mice, and H60 and G60 demonstrated the best anti-inflammatory activity. The 38 chemical compounds shared by H60 and G60 were responsible for their anti-inflammatory activity in asthmatic mice, and the differences in chemical compounds contents and amounts between H60 and G60 were responsible for this activity differences. This work would provide support for further pharmacodynamic material basis study of BSYQT.
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Affiliation(s)
- Q L Luo
- Department of Integrative Medicine, Huashan Hospital, Fudan University, 12 Middle Urumqi Road, Shanghai 200040, China; Institute of Integrated Traditional Chinese and Western Medicine, Fudan University, 12 Middle Urumqi Road, Shanghai 200040, China
| | - M Nurahmat
- Department of Integrative Medicine, Huashan Hospital, Fudan University, 12 Middle Urumqi Road, Shanghai 200040, China; Xinjiang Uygur Medical College, 370 West Beijing Road, Hotan, Xinjiang, China
| | - M H Li
- Department of Integrative Medicine, Huashan Hospital, Fudan University, 12 Middle Urumqi Road, Shanghai 200040, China; Institute of Integrated Traditional Chinese and Western Medicine, Fudan University, 12 Middle Urumqi Road, Shanghai 200040, China
| | - J Sun
- Department of Integrative Medicine, Huashan Hospital, Fudan University, 12 Middle Urumqi Road, Shanghai 200040, China; Institute of Integrated Traditional Chinese and Western Medicine, Fudan University, 12 Middle Urumqi Road, Shanghai 200040, China
| | - M X Chen
- Department of Integrative Medicine, Huashan Hospital, Fudan University, 12 Middle Urumqi Road, Shanghai 200040, China; Institute of Integrated Traditional Chinese and Western Medicine, Fudan University, 12 Middle Urumqi Road, Shanghai 200040, China
| | - F Liu
- Department of Integrative Medicine, Huashan Hospital, Fudan University, 12 Middle Urumqi Road, Shanghai 200040, China; Institute of Integrated Traditional Chinese and Western Medicine, Fudan University, 12 Middle Urumqi Road, Shanghai 200040, China
| | - Y Wei
- Department of Integrative Medicine, Huashan Hospital, Fudan University, 12 Middle Urumqi Road, Shanghai 200040, China; Institute of Integrated Traditional Chinese and Western Medicine, Fudan University, 12 Middle Urumqi Road, Shanghai 200040, China.
| | - J C Dong
- Department of Integrative Medicine, Huashan Hospital, Fudan University, 12 Middle Urumqi Road, Shanghai 200040, China; Institute of Integrated Traditional Chinese and Western Medicine, Fudan University, 12 Middle Urumqi Road, Shanghai 200040, China.
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Lessons learned from mice and man: mimicking human allergy through mouse models. Clin Immunol 2014; 155:1-16. [PMID: 25131136 DOI: 10.1016/j.clim.2014.08.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 08/06/2014] [Accepted: 08/07/2014] [Indexed: 01/06/2023]
Abstract
The relevance of using mouse models to represent human allergic pathologies is still unclear. Recent studies suggest the limitations of using models as a standard for assessing immune response and tolerance mechanisms, as mouse models often do not sufficiently depict human atopic conditions. Allergy is a combination of aberrant responses to innocuous environmental agents and the subsequent TH2-mediated inflammatory responses. In this review, we will discuss current paradigms of allergy - specifically, TH2-mediated and IgE-associated immune responses - and current mouse models used to recreate these TH2-mediated pathologies. Our overall goal is to highlight discrepancies that exist between mice and men by examining the advantages and disadvantages of allergic mouse models with respect to the human allergic condition.
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Tang H, Zhao H, Song J, Dong H, Yao L, Liang Z, LV Y, Zou F, Cai S. Ethyl pyruvate decreases airway neutrophil infiltration partly through a high mobility group box 1-dependent mechanism in a chemical-induced murine asthma model. Int Immunopharmacol 2014; 21:163-70. [PMID: 24819717 DOI: 10.1016/j.intimp.2014.04.024] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 04/24/2014] [Accepted: 04/24/2014] [Indexed: 02/05/2023]
Abstract
BACKGROUND Diisocyanates are one of the leading causes of occupational asthma, which is dominated by granulocytic inflammation in the airway. In this study, we intended to explore the role of ethyl pyruvate (EP) on neutrophil infiltration in a toluene-2,4-diisocyanate (TDI)-induced murine asthma model. METHODS The experimental mice were first dermally sensitized and then challenged with TDI via oropharyngeal aspiration. The mice were treated intraperitoneally with 100, 50 or 10mg/kg EP 1h before each challenge. One day after the last challenge, airway reactivity to methacholine was measured by a barometric plethysmographic chamber. Total and differential cell counts, along with levels of macrophage inflammatory protein-2 (MIP-2), TNF-α in bronchoalveolar lavage (BAL) fluid and mRNA expression of CXCR2 in the lung were assessed. To depict neutrophils, a naphthol AS-D chloroacetate esterase kit was used. High mobility group box 1 (HMGB1) was determined by western blot and immunohistochemistry. RESULTS Treatment with EP dramatically decreased airway hyperresponsiveness in TDI-challenged mice, as well as numbers of neutrophils in BAL fluid and peribronchovascular regions. Both the TDI-induced raised protein level and abnormal distribution of HMGB1 were significantly recovered by EP in a dose-dependent manner. The concentration of MIP-2 in TDI-induced asthma mice was significantly higher than that of the control ones, while EP had few effects on MIP-2. The mRNA expression of CXCR2 didn't change significantly, and TNF-α was not detected in BAL fluids. CONCLUSION EP reduces airway neutrophil infiltration partly through downregulating HMGB1 in a chemical-induced murine asthma model.
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Affiliation(s)
- Haixiong Tang
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Haijin Zhao
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Jiafu Song
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Hangming Dong
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Lihong Yao
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Zhenyu Liang
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Yanhua LV
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Fei Zou
- School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Shaoxi Cai
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
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Pauluhn J. Development of a respiratory sensitization/elicitation protocol of toluene diisocyanate (TDI) in Brown Norway rats to derive an elicitation-based occupational exposure level. Toxicology 2014; 319:10-22. [PMID: 24572447 DOI: 10.1016/j.tox.2014.02.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Revised: 01/21/2014] [Accepted: 02/16/2014] [Indexed: 11/29/2022]
Abstract
Toluene diisocyanate (TDI), a known human asthmagen, was investigated in skin-sensitized Brown Norway rats for its concentration×time (C×t)-response relationship on elicitation-based endpoints. The major goal of study was to determine the elicitation inhalation threshold dose in sensitized, re-challenged Brown Norway rats, including the associated variables affecting the dosimetry of inhaled TDI-vapor in rats and as to how these differences can be translated to humans. Attempts were made to duplicate at least some traits of human asthma by using skin-sensitized rats which were subjected to single or multiple inhalation-escalation challenge exposures. Two types of dose-escalation protocols were used to determine the elicitation-threshold C×t; one used a variable C (Cvar) and constant t (tconst), the other a constant C (Cconst) and variable t (tvar). The selection of the "minimal irritant" C was based an ancillary pre-studies. Neutrophilic granulocytes (PMNs) in bronchoalveolar lavage fluid (BAL) were considered as the endpoint of choice to integrate the allergic pulmonary inflammation. These were supplemented by physiological measurements characterizing nocturnal asthma-like responses and increased nitric oxide in exhaled breath (eNO). The Cconst×tvar regimen yielded the most conclusive dose-response relationship as long C was high enough to overcome the scrubbing capacity of the upper airways. Based on ancillary pre-studies in naïve rats, the related human-equivalent respiratory tract irritant threshold concentration was estimated to be 0.09ppm. The respective 8-h time-adjusted asthma-related human-equivalent threshold C×t-product (dose), in 'asthmatic' rats, was estimated to be 0.003ppm. Both thresholds are in agreement of the current ACGIH TLV(®) of TDI and published human evidence. In summary, the findings from this animal model suggest that TDI-induced respiratory allergy is likely to be contingent on two interlinked, sequentially occurring mechanisms: first, dermal sensitizing encounters high enough to cause systemic sensitization. Second, when followed by inhalation exposure(s) high enough to initiate and amplify an allergic airway inflammation, then a progression into asthma may occur. This bioassay requires an in-depth knowledge on respiratory tract dosimetry and irritation of the involved test substance to clearly understand the dosimetry causing C- and/or C×t-dependent respiratory tract irritation and eventually asthma.
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