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Guo N, Tian H, Song T, Peng Y. Association of TLR4 gene rs4986790 and rs4986791 polymorphisms with asthma susceptibility: meta-analysis and trial sequential analysis. Ann Saudi Med 2024; 44:183-194. [PMID: 38853478 DOI: 10.5144/0256-4947.2024.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/11/2024] Open
Abstract
BACKGROUND The current understanding of the correlation between TLR4 gene (toll-like receptor 4) rs4986790 and rs4986791 polymorphisms and asthma susceptibility is inconclusive, with studies and populations yielding conflicting results. OBJECTIVES Evaluate this relationship using meta-analysis and trial sequential analysis (TSA). PATIENTS AND METHODS Databases were systematically queried for relevant articles from the establishment of the database to 19 June 2023 adhering to predefined inclusion and exclusion criteria. Two authors independently conducted screening, data extraction, and quality evaluation. Meta-analysis and TSA were carried out using RevMan 5.4, StataMP 17.0, and TSA 0.9.5.10 Beta, with α=0.05. Subgroup analyses were conducted based on racial demographics. A sensitivity analysis was conducted employing a one-by-one exclusion method. Publication bias was assessed using the Begg and Egger tests. MAIN OUTCOME MEASURES Association of asthma susceptibility with TLR4 gene rs4986790 and rs4986791 polymorphisms. SAMPLE SIZE 23 articles included 22 studies on the rs4986790 polymorphism and 11 studies on the rs4986791 polymorphism on the TLR4 gene. RESULTS Out of 692 studies screened, 23 met the inclusion criteria. While the overall meta-analysis showed no significant association between the TLR4 rs4986790 polymorphism and asthma susceptibility, subgroup analysis revealed a significant link in the Caucasian population. A significant association was noted in the meta-analysis, particularly among Asian populations, on the rs4986791 polymorphism. The sensitivity analysis indicated that the meta-analysis results were relatively stable. Publication bias analysis revealed minimal influence from publication bias. However, TSA was underscored by the necessity for additional original studies to further validate specific outcomes. CONCLUSIONS Our study underscores the ethnicity-specific impact on the relationship between TLR4 polymorphisms and asthma susceptibility. While the overall findings for rs4986790 were not significant, the association with the Caucasian population merits further investigation. Furthermore, rs4986791 demonstrated a significant correlation with asthma susceptibility, specifically among Asian populations. LIMITATIONS Our study predominantly examined the rs4986790 and rs4986791 polymorphisms, overlooking the potential influence of other genetic variants within TLR4.
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Affiliation(s)
- Nan Guo
- From the Third Clinical Medical College, Nanchang University, Nanchang, Jiangxi, China
| | - Haokun Tian
- From the Joint Programme of Nanchang University and Queen Mary University of London, Nanchang University, Nanchang, Jiangxi, China
| | - Tiangang Song
- From the Joint Programme of Nanchang University and Queen Mary University of London, Nanchang University, Nanchang, Jiangxi, China
| | - Yu Peng
- From the Department of Ophthalmology, First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
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Losol P, Ji MH, Kim JH, Choi JP, Yun JE, Seo JH, Kim BK, Chang YS, Kim SH. Bronchial epithelial cells release inflammatory markers linked to airway inflammation and remodeling in response to TLR5 ligand flagellin. World Allergy Organ J 2023; 16:100786. [PMID: 37332524 PMCID: PMC10276272 DOI: 10.1016/j.waojou.2023.100786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 04/25/2023] [Accepted: 05/16/2023] [Indexed: 06/20/2023] Open
Abstract
Background/Aims Flagellin, which is abundant in gram-negative bacteria, including Pseudomonas, is reported to influence on inflammatory responses in various lung diseases. However, its effect on airway epithelial cells in contribution to asthma pathogenesis is not elucidated yet. We aimed to investigate the effect of TLR5 ligand flagellin on the transcriptomic profile of primary human epithelial cells and to determine the markers of airway inflammation. Methods Normal human bronchial epithelial (NHBE) cells were grown and differentiated in air-liquid interface (ALI) culture for 14-16 days. The cells were treated with flagellin in vitro at 10 and 100 ng/ml for 3 and 24 h. The conditioned media and cells were harvested to validate inflammatory markers involved in airway inflammation using ELISA, Western blot, and quantitative PCR methods. RNA-sequencing was performed to investigate the transcriptional response to flagellin in ALI-NHBE cells. Results Altered transcriptional responses to flagellin in differentiated bronchial epithelial cells were determined, including genes encoding chemokines, matrix metalloproteinases, and antimicrobial biomolecules. Pathway analysis of the transcriptionally responsive genes revealed enrichment of signaling pathways. Flagellin induced the mRNA expressions of proinflammatory cytokines and chemokines, and secretion of GM-CSF, CXCL5, CCL5 and CXCL10. Flagellin enhanced the protein expression of MMP-13 in TGF-β1 and TGF-β2 pretreated cell lysates and Wnt/β-catenin signaling. Conclusions These findings suggest that flagellin could be a potent inducer of inflammatory markers that may contribute to airway inflammation and remodeling.
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Affiliation(s)
- Purevsuren Losol
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea
- Medical Research Center, Seoul National University, Seoul, South Korea
| | - Mi-Hong Ji
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Jin Hee Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Jun-Pyo Choi
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Jeong-Eun Yun
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea
| | - Jang-Ho Seo
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea
| | - Byung-Keun Kim
- Department of Internal Medicine, Korea University Medical Center Anam Hospital, Seoul, South Korea
| | - Yoon-Seok Chang
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea
- Medical Research Center, Seoul National University, Seoul, South Korea
| | - Sae-Hoon Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea
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Wang J, Zhou Y, Zhang H, Hu L, Liu J, Wang L, Wang T, Zhang H, Cong L, Wang Q. Pathogenesis of allergic diseases and implications for therapeutic interventions. Signal Transduct Target Ther 2023; 8:138. [PMID: 36964157 PMCID: PMC10039055 DOI: 10.1038/s41392-023-01344-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 01/20/2023] [Accepted: 02/03/2023] [Indexed: 03/26/2023] Open
Abstract
Allergic diseases such as allergic rhinitis (AR), allergic asthma (AAS), atopic dermatitis (AD), food allergy (FA), and eczema are systemic diseases caused by an impaired immune system. Accompanied by high recurrence rates, the steadily rising incidence rates of these diseases are attracting increasing attention. The pathogenesis of allergic diseases is complex and involves many factors, including maternal-fetal environment, living environment, genetics, epigenetics, and the body's immune status. The pathogenesis of allergic diseases exhibits a marked heterogeneity, with phenotype and endotype defining visible features and associated molecular mechanisms, respectively. With the rapid development of immunology, molecular biology, and biotechnology, many new biological drugs have been designed for the treatment of allergic diseases, including anti-immunoglobulin E (IgE), anti-interleukin (IL)-5, and anti-thymic stromal lymphopoietin (TSLP)/IL-4, to control symptoms. For doctors and scientists, it is becoming more and more important to understand the influencing factors, pathogenesis, and treatment progress of allergic diseases. This review aimed to assess the epidemiology, pathogenesis, and therapeutic interventions of allergic diseases, including AR, AAS, AD, and FA. We hope to help doctors and scientists understand allergic diseases systematically.
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Affiliation(s)
- Ji Wang
- National Institute of TCM constitution and Preventive Medicine, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, P.R. China
| | - Yumei Zhou
- National Institute of TCM constitution and Preventive Medicine, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, P.R. China
| | - Honglei Zhang
- National Institute of TCM constitution and Preventive Medicine, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, P.R. China
| | - Linhan Hu
- National Institute of TCM constitution and Preventive Medicine, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, P.R. China
| | - Juntong Liu
- National Institute of TCM constitution and Preventive Medicine, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, P.R. China
| | - Lei Wang
- National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 1000210, China
| | - Tianyi Wang
- National Institute of TCM constitution and Preventive Medicine, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, P.R. China
| | - Haiyun Zhang
- National Institute of TCM constitution and Preventive Medicine, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, P.R. China
| | - Linpeng Cong
- National Institute of TCM constitution and Preventive Medicine, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, P.R. China
| | - Qi Wang
- National Institute of TCM constitution and Preventive Medicine, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, P.R. China.
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Leukotriene B 4 Receptors Are Necessary for the Stimulation of NLRP3 Inflammasome and IL-1β Synthesis in Neutrophil-Dominant Asthmatic Airway Inflammation. Biomedicines 2021; 9:biomedicines9050535. [PMID: 34064821 PMCID: PMC8151312 DOI: 10.3390/biomedicines9050535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 04/30/2021] [Accepted: 05/06/2021] [Indexed: 11/17/2022] Open
Abstract
The stimulation of the NOD-, LRR- and pyrin domain-containing protein 3 (NLRP3) inflammasome and IL-1β synthesis are associated with chronic respiratory diseases such as neutrophil-dominant severe asthma. Leukotriene B4 (LTB4) is a principal chemoattractant molecule for neutrophil recruitment, and its receptors BLT1 and BLT2 have been suggested to contribute to neutrophil-dominant asthmatic airway inflammation. However, the relationship between BLT1/2 and NLRP3 in neutrophil-dominant asthmatic airway inflammation has not been previously studied. In the present study, we investigated whether BLT1/2 play any roles in stimulating the NLRP3 inflammasome and IL-1βsynthesis. The blockade of BLT1 or BLT2 clearly suppressed the stimulation of the NLRP3 inflammasome and IL-1β synthesis in house dust mite (HDM)/lipopolysaccharide (LPS)-induced neutrophilic airway inflammation. The enzymes 5-lipoxygenase and 12-lipoxygenase, which catalyze the synthesis of BLT1/2 ligands [LTB4, 12(S)-hydroxyeicosatetraenoic acid (12(S)-HETE), and 12-hydroxyheptadecatreinoic acid (12-HHT)], were also critically associated with the stimulation of NLRP3 and IL-1β synthesis. Together, our results suggest that the 5-/12-LOX-BLT1/2-linked cascade are necessary for the simulation of the NLRP3 inflammasome and IL-1β synthesis, thus contributing to HDM/LPS-induced neutrophil-dominant airway inflammation.
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Poulsen SS, Bengtson S, Williams A, Jacobsen NR, Troelsen JT, Halappanavar S, Vogel U. A transcriptomic overview of lung and liver changes one day after pulmonary exposure to graphene and graphene oxide. Toxicol Appl Pharmacol 2020; 410:115343. [PMID: 33227293 DOI: 10.1016/j.taap.2020.115343] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 11/13/2020] [Accepted: 11/19/2020] [Indexed: 02/07/2023]
Abstract
Hazard evaluation of graphene-based materials (GBM) is still in its early stage and it is slowed by their large diversity in the physicochemical properties. This study explores transcriptomic differences in the lung and liver after pulmonary exposure to two GBM with similar physical properties, but different surface chemistry. Female C57BL/6 mice were exposed by a single intratracheal instillation of 0, 18, 54 or 162 μg/mouse of graphene oxide (GO) or reduced graphene oxide (rGO). Pulmonary and hepatic changes in the transcriptome were profiled to identify commonly and uniquely perturbed functions and pathways by GO and rGO. These changes were then related to previously analyzed toxicity endpoints. GO exposure induced more differentially expressed genes, affected more functions, and perturbed more pathways compared to rGO, both in lung and liver tissues. The largest differences were observed for the pulmonary innate immune response and acute phase response, and for hepatic lipid homeostasis, which were strongly induced after GO exposure. These changes collective indicate a potential for atherosclerotic changes after GO, but not rGO exposure. As GO and rGO are physically similar, the higher level of hydroxyl groups on the surface of GO is likely the main reason for the observed differences. GO exposure also uniquely induced changes in the transcriptome related to fibrosis, whereas both GBM induced similar changes related to Reactive Oxygen Species production and genotoxicity. The differences in transcriptomic responses between the two GBM types can be used to understand how physicochemical properties influence biological responses and enable hazard evaluation of GBM and hazard ranking of GO and rGO, both in relation to each other and to other nanomaterials.
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Affiliation(s)
- Sarah S Poulsen
- National Research Centre for the Working Environment, Copenhagen Ø, Denmark
| | - Stefan Bengtson
- National Research Centre for the Working Environment, Copenhagen Ø, Denmark; Department of Science and Environment, Roskilde University, Roskilde, Denmark
| | - Andrew Williams
- Environmental and Radiation Health Sciences Directorate, Health Canada, Ottawa, Ontario K1A 0K9, Canada
| | - Nicklas R Jacobsen
- National Research Centre for the Working Environment, Copenhagen Ø, Denmark
| | - Jesper T Troelsen
- Department of Science and Environment, Roskilde University, Roskilde, Denmark
| | - Sabina Halappanavar
- Environmental and Radiation Health Sciences Directorate, Health Canada, Ottawa, Ontario K1A 0K9, Canada
| | - Ulla Vogel
- National Research Centre for the Working Environment, Copenhagen Ø, Denmark; Department of Health Technology, Technical University of Denmark, Kgs. Lyngby, Denmark.
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Wang SB, Chen SM, Zhu KS, Zhou B, Chen L, Zou XY. Increased lipopolysaccharide content is positively correlated with glucocorticoid receptor-beta expression in chronic rhinosinusitis with nasal polyps. IMMUNITY INFLAMMATION AND DISEASE 2020; 8:605-614. [PMID: 32870597 PMCID: PMC7654414 DOI: 10.1002/iid3.346] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 07/22/2020] [Accepted: 08/14/2020] [Indexed: 01/29/2023]
Abstract
Introduction Chronic rhinosinusitis with nasal polyps (CRSwNP) is a common and frequently occurring disease of the upper respiratory tract. The nasal instillation of the Gram‐negative (G−) bacterial product lipopolysaccharide (LPS) can induce not only acute sinusitis but also the development of CRSwNP in animal models. Nevertheless, the expression and distribution of LPS in patients with CRSwNP have not been investigated. And the study was to investigate the expression of LPS and its relationship with glucocorticoid receptors (GRs) in CRSwNP. Methods Multiple methods, including bacterial culture and immunohistochemistry, were used to detect and analyze nasal bacteria, plasma LPS content, and the levels of LPS and GR‐α/β, cluster of differentiation 68 (CD68), and myeloperoxidase (MPO) expression, as well as their relationship in CRSwNP. Results The number of G− bacteria and Escherichia coli (E. coli) was not significantly different between CRSwNP subjects and the controls. However, the positive rate of LPS was much higher than that of E. coli in CRSwNP subjects and was significantly higher in noneosinophilic CRSwNP subjects than in eosinophilic CRSwNP subjects. Moreover, the LPS levels were positively correlated with GR‐β but not GR‐α expression in CRSwNP. Immunofluorescence assays showed that LPS was mainly detected in CD68+ macrophages and MPO+ neutrophils, in addition to histiocytes, in CRSwNP. Conclusions Persistent LPS in CRSwNP can lead to unresolved mucosal inflammation, eventually leading to tissue remodeling and the development of CRSwNP. Our findings suggest that increased LPS content and possible resistance to glucocorticoids may be one of the important pathogenic mechanisms of G− bacteria in CRSwNP.
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Affiliation(s)
- Shui-Bin Wang
- Department of Otolaryngology-Head and Neck Surgery, Yichang Yiling Hospital, Yichang, China
| | - Shi-Ming Chen
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | | | - Bin Zhou
- Department of Otolaryngology-Head and Neck Surgery, Yichang Yiling Hospital, Yichang, China
| | - Long Chen
- Department of Otolaryngology-Head and Neck Surgery, Yichang Yiling Hospital, Yichang, China
| | - Xiao-Yan Zou
- Department of Laboratory Medicine, Yichang Yiling Hospital, Yichang, China
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Thakur VR, Khuman V, Beladiya JV, Chaudagar KK, Mehta AA. An experimental model of asthma in rats using ovalbumin and lipopolysaccharide allergens. Heliyon 2019; 5:e02864. [PMID: 31768443 PMCID: PMC6872797 DOI: 10.1016/j.heliyon.2019.e02864] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 05/14/2019] [Accepted: 11/12/2019] [Indexed: 12/20/2022] Open
Abstract
Asthma is chronic and multi-factorial inflammatory disease hence single allergen induced asthma in an animal is not identical to clinical asthma. Therefore, we developed a novel experimental model of asthma in rats using ovalbumin (OVA) and lipopolysaccharide (LPS) allergens. Rats were divided into four groups; normal (NC), OVA, LPS, and OVA-LPS treated. Rats were sensitized with OVA (100 μg/kg, adsorbed in 100 mg/mL aluminum hydroxide, i.p.), LPS (10 μg/kg, i.p.) and both (OVA-LPS) on 7th, 14th, 21st days and was followed by challenge with OVA (1%w/v), LPS (1%w/v), OVA (0.5%w/v) and LPS (0.5%w/v) for 30 min thrice/week for three weeks in the OVA, LPS and OVA-LPS groups, respectively. On 41 day, lung function parameters (respiration rate, tidal volume, and airflow rate), total and differential leukocytes count in the blood as well as BALf and inflammatory cytokines (IL-4, IL-5, and IL-13) in serum were measured. Histology of lungs was performed. The results suggested that the tidal volume and airflow rate were significantly decreased while respiration rate, total and differential leukocytes count in blood as well as BALf and serum cytokines level were significantly increased in the OVA-LPS as compared to NC, OVA, and LPS. In conclusion, the combination of OVA and LPS induced phenotypes of severe asthma with eosinophilic, neutrophilic and lymphocytic inflammation.
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Affiliation(s)
- Vandana R Thakur
- Department of Pharmacology, L. M. College of Pharmacy, Ahmedabad, Gujarat, India
| | - Vikas Khuman
- Department of Pharmacology, L. M. College of Pharmacy, Ahmedabad, Gujarat, India
| | - Jayesh V Beladiya
- Department of Pharmacology, L. M. College of Pharmacy, Ahmedabad, Gujarat, India
| | - Kiranj K Chaudagar
- Department of Pharmacology, L. M. College of Pharmacy, Ahmedabad, Gujarat, India
| | - Anita A Mehta
- Department of Pharmacology, L. M. College of Pharmacy, Ahmedabad, Gujarat, India
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Xu H, Shu H, Zhu J, Song J. Inhibition of TLR4 inhibits allergic responses in murine allergic rhinitis by regulating the NF-κB pathway. Exp Ther Med 2019; 18:761-768. [PMID: 31281453 DOI: 10.3892/etm.2019.7631] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Accepted: 03/29/2019] [Indexed: 02/06/2023] Open
Abstract
The present study investigated the underlying mechanisms and effects of toll-like receptor 4 (TLR4) on a mouse model of allergic rhinitis (AR). An ovalbumin (OVA)-induced mouse model of AR was treated with TLR4-short hairpin RNA (shRNA). Allergic symptoms were then subsequently assessed. Protein levels of OVA-specific immunoglobulin E (IgE), eosinophil cation protein (ECP), leukotriene C4 (LTC4) and prostaglandin D2 (PGD2) in mice serum and nasal lavage fluid, as well as various inflammatory cytokine mediators in mice serum, were determined by ELISA. Protein level detection was performed using reverse transcription-quantitative PCR and western blot analysis. The results revealed that TLR4 was highly expressed in the nasal mucosa of AR mice. TLR4 inhibition significantly relieved OVA-induced AR symptoms. Relief of symptoms was evidenced by a decreased frequency of sneezing and nose friction, reduced levels of OVA-specific IgE, ECP, LTC4, PGD2, less inflammatory cells and decreased levels of T-helper 2 type cytokines. In addition, the data indicated that OVA-induced activation of the NF-κB pathway was repressed by TLR4-shRNA. The results of the current study indicate that TLR4 may be a promising therapeutic target of AR.
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Affiliation(s)
- Hangyu Xu
- Department of Otolaryngology, Taizhou Central Hospital, Taizhou University Hospital, Taizhou, Zhejiang 318000, P.R. China
| | - Hairong Shu
- Department of Otolaryngology, Taizhou Central Hospital, Taizhou University Hospital, Taizhou, Zhejiang 318000, P.R. China
| | - Jie Zhu
- Medical Test Center, Taizhou Central Hospital, Taizhou University Hospital, Taizhou, Zhejiang 318000, P.R. China
| | - Jianxin Song
- Department of Otolaryngology, Taizhou Central Hospital, Taizhou University Hospital, Taizhou, Zhejiang 318000, P.R. China
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Li J, Yang L, Wang J, Yang Y, Wu Y, Jiang Q, Yang Y, Ma D, Zhang R, Huang N, Li W, Liu G, Zhu R. Alternaria B Cell Mimotope Immunotherapy Alleviates Allergic Responses in a Mouse Model. THE JOURNAL OF IMMUNOLOGY 2019; 203:31-38. [PMID: 31092638 DOI: 10.4049/jimmunol.1801182] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 04/25/2019] [Indexed: 11/19/2022]
Abstract
Alternaria is a major outdoor allergen. Immunotherapy with Alternaria extracts has been documented to be effective in the sensitized patients. However, Alternaria extracts are notoriously difficult to standardize. Our aim is to screen the B cell mimotopes of Alternaria and to evaluate the therapeutic effects of B cell mimotope peptides on a BALB/c mouse model of Alternaria allergy. After a human sera pool from Alternaria monosensitized patients was established, B cell mimotopes were screened by a phage-displayed random heptamer peptide library that was identified via mixed Alternaria-specific IgE in the sera pool. B cell mimotopes with phage as a carrier were used to perform immunotherapy in an Alternaria allergy mouse model. Serological Ab levels, lung histology, and cytokine profiles were compared in the mimotope immunotherapy group, natural extract immunotherapy group, irrelevant phage control group, Alternaria-sensitized model group, and saline-blank group. Two mimotopes (MISTSRK and QKRNTIT) presented high binding ability with the sera of the Alternaria-allergic patients and mice and, therefore, were selected for immunotherapy in the mouse model. Compared with irrelevant phage control, model, and natural extract immunotherapy group, mimotope immunotherapy group significantly reduced serum IgE levels, inflammatory cells infiltration in the lung tissue, and IL-4 levels in bronchoalveolar lavage fluid, whereas serum IgG1 and IFN-γ levels in bronchoalveolar lavage fluid were increased. Our results indicate that B cell mimotopes of Alternaria alleviates allergic response in a mouse model and have potential as novel therapeutic agents for IgE-mediated Alternaria-allergic diseases.
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Affiliation(s)
- Jie Li
- Department of Allergy, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030 Wuhan, China
| | - Lin Yang
- Department of Allergy, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030 Wuhan, China
| | - Jingru Wang
- Department of Allergy, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030 Wuhan, China
| | - Yongshi Yang
- Department of Allergy, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030 Wuhan, China
| | - Yuying Wu
- Department of Allergy, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030 Wuhan, China
| | - Qing Jiang
- Department of Allergy, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030 Wuhan, China
| | - Yaqi Yang
- Department of Allergy, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030 Wuhan, China
| | - Dongxia Ma
- Department of Allergy, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030 Wuhan, China
| | - Rui Zhang
- Department of Allergy, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030 Wuhan, China
| | - Nan Huang
- Department of Allergy, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030 Wuhan, China
| | - Wenjing Li
- Department of Allergy, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030 Wuhan, China
| | - Guanghui Liu
- Department of Allergy, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030 Wuhan, China
| | - Rongfei Zhu
- Department of Allergy, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030 Wuhan, China
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Methyl jasmonate a stress phytohormone attenuates LPS induced in vivo and in vitro arthritis. Mol Biol Rep 2018; 46:647-656. [PMID: 30498880 DOI: 10.1007/s11033-018-4520-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Accepted: 11/22/2018] [Indexed: 01/20/2023]
Abstract
The objective of present study was to screen the effect of methyl jasmonate (MJ) in lipopolysaccharide (LPS) induced in vivo and in vitro arthritis. Arthritis was induced in wistar rats by intraplantar administration of LPS (1 mg/Kg) and effect of MJ was screened in two doses (20, 40 mg/Kg, IP), indomethacin (30 mg/Kg p.o) was used as standard. The anti-nociceptive effect was evaluated through behavioral assessment viz. cold allodynia, Paw thermal hyperalgesia and Tail cold hyperalgesia on 1st, 7th, 14th, 21st and 28th day. The Myeloperoxidase (MPO), Cathepsin D (CAT-D), articular elastase (ELA), and nitrite levels were estimated in articular cartilage tissues on the 28th day. Rat paw was subjected to histopathology after radiological examination on 28th day. In vitro effect of MJ was evaluated for three concentrations (5, 10, 20 µg/ml) in LPS (1 µg/ml) stimulated CHNO001 cells. Estimation of pro-inflammatory mediators was carried using ELISA. Significant reduction in pro-inflammatory mediators was observed in MJ treated chondrocyte cells. % proteinase inhibition was assessed for 10, 50, 100, 250, 500 µg/mL and IC50 was found 266.15. MJ significantly reducesnociceptive response against hot and cold allodynia. Significant reduction in MPO, ELA, and nitrite levels was observed. The CAT-D levels significantly restored. Minimum focal mild infiltration of lymphocytes was observed at synovial area in standard and MJ treated rats. These current studies conclude that MJ has protective role in arthritis.
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Intranasal curcumin protects against LPS-induced airway remodeling by modulating toll-like receptor-4 (TLR-4) and matrixmetalloproteinase-9 (MMP-9) expression via affecting MAP kinases in mouse model. Inflammopharmacology 2018; 27:731-748. [PMID: 30470954 DOI: 10.1007/s10787-018-0544-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 11/02/2018] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Bacterial infections can exacerbate asthmatic inflammation depending on lipopolysaccharide (LPS) composition, the outermost component of cell wall, its exposure timings as well as host's immune status. In present study, Balb/c mice were exposed to antigen (ovalbumin) and LPS simultaneously to establish an asthmatic model. Curcumin (diferuloylmethane), well known for its anti-inflammatory potential, was administered through intranasal route 1 h before LPS and OVA (ovalbumin) exposure to evaluate its efficacy against airway structural changes. METHODS Inflammatory cell infiltration in lungs was measured by flow cytometry and further eosinophils were especially measured by immunofluorescence detection of major basic protein (MBP) as marker of eosinophilc granule protein. We also measured reactive oxygen species (ROS) in BALF by spectrofluorometry. MMP-9 activity was evaluated by gelatin zymography and mRNA expressions of MMP-9, TIMP-1, TGF-β1, IL-13, Collagen-1 and TLR-4 were measured in lungs. Protein expression of MAP kinases (P-ERK, P-JNK, P-p38), TLR-4, Cox-2, Lox-5 and Eotaxin was measured by western blotting. Hydroxyproline level and masson's trichrome staining were used to evaluate collagen deposition in lung. RESULTS Exposure to LPS (0.1 µg) exacerbates airway inflammation and induces structural changes in lungs by enhanced ROS production, collagen deposition, expression of genes involved in airway remodeling and activation of MAP kinases pathway enzymes. Intranasal curcumin pretreatment had significantly suppressed inflammatory mediators and airway remodeling proteins. CONCLUSION Our results strongly suggest that intranasal curcumin effectively protects LPS-induced airway inflammation and structural changes by modulating genes involved in airway remodeling in safer way; hence, it can be considered as supplementary alternative towards asthma treatments.
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Huang C, Wang J, Zheng X, Chen Y, Wei H, Sun R, Tian Z. Activation of TLR Signaling in Sensitization-Recruited Inflammatory Monocytes Attenuates OVA-Induced Allergic Asthma. Front Immunol 2018; 9:2591. [PMID: 30510553 PMCID: PMC6252340 DOI: 10.3389/fimmu.2018.02591] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Accepted: 10/22/2018] [Indexed: 12/14/2022] Open
Abstract
The activation of Toll-like receptor (TLR) signaling is widely reported to be involved in preventing the development of allergic asthma. However, the mechanism of the protective function of TLR signaling remains limited. Here, we studied the mouse model of ovalbumin (OVA)-induced allergic asthma and found that deficiency of TLR signaling or activating TLR signaling with agonist would aggravate or attenuate OVA-induced allergic asthma, respectively, and TLR signaling-mediated protective effect mainly affected the sensitization phase. After OVA/alum sensitization, neutrophils and inflammatory monocytes were recruited into peritoneal cavity and up-regulated TLRs expression. However, adoptive transfer of inflammatory monocytes but not peritoneal macrophages or neutrophils induced allergic symptoms in recipient mice after OVA challenge even without OVA/alum sensitization, and treating the inflammatory monocytes with TLR agonist in vitro before transfer could abolish this effect, indicating that recruited inflammatory monocytes played a determinant role in OVA-induced allergic asthma, and activation of TLR signaling in them could attenuate allergic symptoms. Finally, we found that activation of TLR signaling could increase the expression of T-helper (Th) 1-associated cytokines in inflammatory monocytes. Our results suggest that activation of TLR signaling in sensitization-recruited inflammatory monocytes attenuates OVA-induced allergic asthma by promoting the expression of Th1-associated cytokines.
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Affiliation(s)
- Chao Huang
- Institute of Immunology and The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei, China
| | - Jian Wang
- Institute of Immunology and The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei, China
| | - Xiaodong Zheng
- Institute of Immunology and The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei, China
| | - Yongyan Chen
- Institute of Immunology and The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei, China
| | - Haiming Wei
- Institute of Immunology and The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei, China.,Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, China
| | - Rui Sun
- Institute of Immunology and The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei, China.,Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, China
| | - Zhigang Tian
- Institute of Immunology and The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei, China.,Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, China
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13
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Thakur VR, Beladiya JV, Chaudagar KK, Mehta AA. An anti-asthmatic activity of natural Toll-like receptor-4 antagonist in OVA-LPS-induced asthmatic rats. Clin Exp Pharmacol Physiol 2018; 45:1187-1197. [PMID: 29935094 DOI: 10.1111/1440-1681.13002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 06/16/2018] [Accepted: 06/20/2018] [Indexed: 12/17/2022]
Abstract
Toll-like receptor-4 (TLR4) is a key component of the innate immune system and activation of TLR4 signaling has a significant role in the pathogenesis of asthma. Therefore, our objective was to identify the natural TLR4 antagonist and evaluate its activity in experimentally induced asthma. Soya lecithin origin phosphatidylcholine (soya PC) was identified as a natural TLR4 antagonist by computational study. Based on the computational study, TLR4 antagonist activity of soya PC was confirmed in in vitro lipopolysaccharide (LPS)-induced neutrophil adhesion assay. In the in vivo study, rats were sensitized with ovalbumin (OVA) (100 μg/kg, i.p.) on the 7th, 14th and 21st days and challenged intranasally with OVA (100 μg/100 μL) and LPS (10 ng/100 μL), 4 days/wk for 3 weeks. At the end of the experiment, we performed lung function parameters (respiratory rate, tidal volume, airflow rate), inflammatory cytokines (interleukin [IL]-4, IL-5, IL-13), total and differential leukocytes in blood as well as bronchoalveolar lavage fluid (BALf) and histological examinations. The computational study indicated that TLR4 antagonist activity of soya PC is due to linoleic acid (18:2) fatty acid chain. Soya PC significantly suppressed the LPS-induced neutrophil adhesion in a concentration-dependent manner to 1 μg/mL. The treatment of soya PC (5 and 10 mg/kg, 18 days, i.p.) significantly improved the lung function parameters, total and differential leukocyte counts in blood and BALf in asthmatic rats. This efficacy of soya PC was in extent similar to dexamethasone (2.5 mg/kg, 18 days, i.p.). However, soya PC was superior to dexamethasone in terms of benefits. The protective action of soya PC may be due to TLR4 antagonist activity and linoleic acid composition.
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Affiliation(s)
- Vandana R Thakur
- Department of Pharmacology, L. M. College of Pharmacy, Ahmedabad, India
| | - Jayesh V Beladiya
- Department of Pharmacology, L. M. College of Pharmacy, Ahmedabad, India
| | | | - Anita A Mehta
- Department of Pharmacology, L. M. College of Pharmacy, Ahmedabad, India
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Zakeri A, Russo M. Dual Role of Toll-like Receptors in Human and Experimental Asthma Models. Front Immunol 2018; 9:1027. [PMID: 29867994 PMCID: PMC5963123 DOI: 10.3389/fimmu.2018.01027] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 04/24/2018] [Indexed: 12/31/2022] Open
Abstract
Asthma is a chronic airway inflammatory disease that is influenced by the interplay between genetic factors and exposure to environmental allergens, microbes, or microbial products where toll-like receptors (TLRs) play a pivotal role. TLRs recognize a wide range of microbial or endogenous molecules as well as airborne environmental allergens and act as adjuvants that influence positively or negatively allergic sensitization. TLRs are qualitatively and differentially expressed on hematopoietic and non-hematopoietic stromal or structural airway cells that when activated by TLRs agonists exert an immune-modulatory role in asthma development. Therefore, understanding mechanisms and pathways by which TLRs orchestrate asthma outcomes may offer new strategies to control the disease. Here, we aim to review and critically discuss the role of TLRs in human asthma and murine models of allergic airway inflammation, highlighting the complexity of TLRs function in development, exacerbation, or control of airway allergic inflammation.
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Affiliation(s)
- Amin Zakeri
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark
| | - Momtchilo Russo
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
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15
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The IL-33-PIN1-IRAK-M axis is critical for type 2 immunity in IL-33-induced allergic airway inflammation. Nat Commun 2018; 9:1603. [PMID: 29686383 PMCID: PMC5913134 DOI: 10.1038/s41467-018-03886-6] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 03/21/2018] [Indexed: 11/24/2022] Open
Abstract
Interleukin 33 (IL-33) is among the earliest-released cytokines in response to allergens that orchestrate type 2 immunity. The prolyl cis-trans isomerase PIN1 is known to induce cytokines for eosinophil survival and activation by stabilizing cytokines mRNAs, but the function of PIN1 in upstream signaling pathways in asthma is unknown. Here we show that interleukin receptor associated kinase M (IRAK-M) is a PIN1 target critical for IL-33 signaling in allergic asthma. NMR analysis and docking simulations suggest that PIN1 might regulate IRAK-M conformation and function in IL-33 signaling. Upon IL-33-induced airway inflammation, PIN1 is activated for binding with and isomerization of IRAK-M, resulting in IRAK-M nuclear translocation and induction of selected proinflammatory genes in dendritic cells. Thus, the IL-33-PIN1-IRAK-M is an axis critical for dendritic cell activation, type 2 immunity and IL-33 induced airway inflammation. IL-33 orchestrates type 2 immunity in allergic asthma. Here the authors show, using biochemical, structural and patient data, that upon IL-33 or allergic challenge, the isomerase Pin1 modifies IRAK-M to control the production of pro-inflammatory cytokines in the setting of airway inflammation.
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Wedman PA, Aladhami A, Chumanevich AP, Fuseler JW, Oskeritzian CA. Mast cells and sphingosine-1-phosphate underlie prelesional remodeling in a mouse model of eczema. Allergy 2018; 73:405-415. [PMID: 28905998 PMCID: PMC10127444 DOI: 10.1111/all.13310] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/07/2017] [Indexed: 01/09/2023]
Abstract
BACKGROUND Atopic dermatitis (AD) is a chronic skin inflammation that affects children and adults worldwide, but its pathogenesis remains ill-understood. METHODS We show that a single application of OVA to mouse skin initiates remodeling and cellular infiltration of the hypodermis measured by a newly developed computer-aided method. RESULTS Importantly, we demonstrate that skin mast cell (MC) activation and local sphingosine-1-phosphate (S1P) are significantly augmented after OVA treatment in mice. Deficiency in sphingosine kinase (SphK)1, the S1P-producing enzyme, or in MC, remarkably mitigates all signs of OVA-mediated remodeling and MC activation. Furthermore, skin S1P levels remain unchanged in MC-deficient mice exposed to OVA. LPS-free OVA does not recapitulate any of the precursor signs of AD, supporting a triggering contribution of LPS in AD that, per se, suffice to activate local MC and elevate skin S1P. CONCLUSION We describe MC and S1P as novel pathogenic effectors that initiate remodeling in AD prior to any skin lesions and reveal the significance of LPS in OVA used in most studies, thus mimicking natural antigen (Ag) exposure.
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Affiliation(s)
- P. A. Wedman
- Department of Pathology, Microbiology and Immunology; University of South Carolina School of Medicine; Columbia SC USA
| | - A. Aladhami
- Department of Pathology, Microbiology and Immunology; University of South Carolina School of Medicine; Columbia SC USA
- University of Baghdad; Baghdad Iraq
| | - A. P. Chumanevich
- Department of Pathology, Microbiology and Immunology; University of South Carolina School of Medicine; Columbia SC USA
| | - J. W. Fuseler
- Department of Pathology, Microbiology and Immunology; University of South Carolina School of Medicine; Columbia SC USA
| | - C. A. Oskeritzian
- Department of Pathology, Microbiology and Immunology; University of South Carolina School of Medicine; Columbia SC USA
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Elaidy SM, Essawy SS, Hussain MA, El-Kherbetawy MK, Hamed ER. Modulation of the IL-23/IL-17 axis by fenofibrate ameliorates the ovalbumin/lipopolysaccharide-induced airway inflammation and bronchial asthma in rats. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2017; 391:309-321. [PMID: 29288381 DOI: 10.1007/s00210-017-1459-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Accepted: 12/18/2017] [Indexed: 10/18/2022]
Abstract
The overlapping between asthmatic subtypes, including both CD4+ T helper (TH)2 and TH17 cells, is found in the natural course of allergic asthma, especially in exacerbations and severe and insensitive forms to steroids, which are in need of new molecular therapies. In the TH2-subset mediated asthma, fenofibrate displays therapeutic promises, besides evidenced therapeutic effects on TH17-mediated colitis and myocarditis. Therefore, the effects of fenofibrate versus dexamethasone on IL-23/IL-17 axis in ovalbumin (OVA)/lipopolysaccharide (LPS)-induced airway inflammation and bronchial asthma in rats were explored. The OVA/LPS sensitization and challenge were performed for 28 days in male Wistar rats. After sensitization, fenofibrate (100 mg/kg/day) or dexamethasone (2.5 mg/kg/day) was orally administered from the day 15 to 28. Either fenofibrate or dexamethasone attenuated the severity of OVA/LPS-induced airway inflammation and bronchial asthma through significant ameliorations in the total serum immunoglobulin (Ig)E assay; the total and differential leukocytic counts in the bronchoalveolar lavage (BAL) fluid; the lung inflammatory cytokines such as interleukin (IL)-4, IL-13, IL-17, and IL-23, transforming growth factor (TGF)-β1, and tumor necrosis factor(TNF)-α levels; and the lung IL-17 and IL-23 expressions. In addition to the reduction in the inflammatory and fibrotic histopathological scores, fenofibrate significantly ameliorated the BAL neutrophilic count and the lung IL-17 and IL-23 expressions in comparison to dexamethasone. The suppression of IL-23/IL-17 axis could be considered a molecular therapeutic target for fenofibrate in OVA/LPS-induced airway inflammation and bronchial asthma. Combined therapeutic regimens of fenofibrate and steroids should be furtherly investigated in severe and resistant asthma.
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Affiliation(s)
- Samah M Elaidy
- Department of Clinical Pharmacology, Faculty of Medicine, Suez Canal University, Ismailia, 41522, Egypt.
| | - Soha S Essawy
- Department of Clinical Pharmacology, Faculty of Medicine, Suez Canal University, Ismailia, 41522, Egypt
| | - Mona A Hussain
- Department of Physiology, Faculty of Medicine, Port Said University, Port Said, Egypt
| | | | - Eman R Hamed
- Department of Internal Medicine, Faculty of Medicine, Suez Canal University, Ismailia, 41522, Egypt
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18
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Wang S, Zhang H, Xi Z, Huang J, Nie J, Zhou B, Deng Y, Tao Z. Establishment of a mouse model of lipopolysaccharide-induced neutrophilic nasal polyps. Exp Ther Med 2017; 14:5275-5282. [PMID: 29285053 PMCID: PMC5740573 DOI: 10.3892/etm.2017.5208] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2016] [Accepted: 02/10/2017] [Indexed: 01/16/2023] Open
Abstract
Research has identified that gram-negative bacteria have an important role in refractory nasal polyps. In the present study, lipopolysaccharide (LPS) was used to establish a mouse model with neutrophilic nasal polyps in order to explore the effect and mechanism of LPS on the formation of neutrophilic nasal polyps in mice. A total of 5 or 10 µg of LPS was dropped into the nasal cavities of C57BL/6J mice in order to establish animal models with neutrophilic nasal polyps. Histological staining, toll-like receptor 4 (TLR4), cluster of differentiation 68 for macrophages and myeloperoxidase for neutrophil immunohistochemistry were used to observe histopathological changes in the nasal mucosa. The expression levels of cytokines, including interferon (IFN)-γ, tumor necrosis factor (TNF)-α, interleukin (IL)-4 and IL-17 in the nasal lavage fluid, were detected by ELISA. Compared with the control group, mice in the LPS groups exhibited significant mucosa epithelial cell damage and nasal polyp formation. Furthermore, TLR4+ cells, macrophages, neutrophils and significantly increased levels of IFN-γ, TNF-α, and IL-17 in the nasal lavage fluids were indicated (all P=0.008). These findings indicated that LPS is able to activate the TLR4 receptor pathway to induce the formation of neutrophilic nasal polyps in mice. Additionally, LPS administration was accompanied by a significant increase in the number of macrophages, T helper (Th) 1 and Th17-related cytokines (P=0.009, P=0.008 and P=0.008, respectively). Therefore, the present model is commensurate with the characteristics of primary nasal polyps that have been identified in the Asian population.
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Affiliation(s)
- Shuibin Wang
- Department of Otolaryngology-Head and Neck Surgery, Yichang Yiling Hospital, Yichang, Hubei 443100, P.R. China
| | - Hanwu Zhang
- Department of Otolaryngology-Head and Neck Surgery, Yichang Yiling Hospital, Yichang, Hubei 443100, P.R. China
| | - Zulian Xi
- Department of Otolaryngology-Head and Neck Surgery, Yichang Yiling Hospital, Yichang, Hubei 443100, P.R. China
| | - Jingjing Huang
- Department of Otolaryngology-Head and Neck Surgery, Yichang Yiling Hospital, Yichang, Hubei 443100, P.R. China
| | - Jun Nie
- Department of Otolaryngology-Head and Neck Surgery, Yichang Yiling Hospital, Yichang, Hubei 443100, P.R. China
| | - Bin Zhou
- Department of Otolaryngology-Head and Neck Surgery, Yichang Yiling Hospital, Yichang, Hubei 443100, P.R. China
| | - Yuqin Deng
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Zezhang Tao
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
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Koopmans T, Gosens R. Revisiting asthma therapeutics: focus on WNT signal transduction. Drug Discov Today 2017; 23:49-62. [PMID: 28890197 DOI: 10.1016/j.drudis.2017.09.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 07/20/2017] [Accepted: 09/01/2017] [Indexed: 12/16/2022]
Abstract
Asthma is a complex disease of the airways that develops as a consequence of both genetic and environmental factors. This interaction has highlighted genes important in early life, particularly those that control lung development, such as the Wingless/Integrase-1 (WNT) signalling pathway. Although aberrant WNT signalling is involved with an array of human conditions, it has received little attention within the context of asthma. Yet it is highly relevant, driving events involved with inflammation, airway remodelling, and airway hyper-responsiveness (AHR). In this review, we revisit asthma therapeutics by examining whether WNT signalling is a valid therapeutic target for asthma.
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Affiliation(s)
- Tim Koopmans
- Department of Molecular Pharmacology, University of Groningen, The Netherlands; Groningen Research Institute for Asthma and COPD (GRIAC), University of Groningen, The Netherlands
| | - Reinoud Gosens
- Department of Molecular Pharmacology, University of Groningen, The Netherlands; Groningen Research Institute for Asthma and COPD (GRIAC), University of Groningen, The Netherlands.
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20
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Gao W, Xiong Y, Li Q, Yang H. Inhibition of Toll-Like Receptor Signaling as a Promising Therapy for Inflammatory Diseases: A Journey from Molecular to Nano Therapeutics. Front Physiol 2017; 8:508. [PMID: 28769820 PMCID: PMC5516312 DOI: 10.3389/fphys.2017.00508] [Citation(s) in RCA: 237] [Impact Index Per Article: 33.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Accepted: 07/03/2017] [Indexed: 12/20/2022] Open
Abstract
The recognition of invading pathogens and endogenous molecules from damaged tissues by toll-like receptors (TLRs) triggers protective self-defense mechanisms. However, excessive TLR activation disrupts the immune homeostasis by sustained pro-inflammatory cytokines and chemokines production and consequently contributes to the development of many inflammatory and autoimmune diseases, such as systemic lupus erythematosus (SLE), infection-associated sepsis, atherosclerosis, and asthma. Therefore, inhibitors/antagonists targeting TLR signals may be beneficial to treat these disorders. In this article, we first briefly summarize the pathophysiological role of TLRs in the inflammatory diseases. We then focus on reviewing the current knowledge in both preclinical and clinical studies of various TLR antagonists/inhibitors for the prevention and treatment of inflammatory diseases. These compounds range from conventional small molecules to therapeutic biologics and nanodevices. In particular, nanodevices are emerging as a new class of potent TLR inhibitors for their unique properties in desired bio-distribution, sustained circulation, and preferred pharmacodynamic and pharmacokinetic profiles. More interestingly, the inhibitory activity of these nanodevices can be regulated through precise nano-functionalization, making them the next generation therapeutics or “nano-drugs.” Although, significant efforts have been made in developing different kinds of new TLR inhibitors/antagonists, only limited numbers of them have undergone clinical trials, and none have been approved for clinical uses to date. Nevertheless, these findings and continuous studies of TLR inhibition highlight the pharmacological regulation of TLR signaling, especially on multiple TLR pathways, as future promising therapeutic strategy for various inflammatory and autoimmune diseases.
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Affiliation(s)
- Wei Gao
- Department of Respiratory Medicine, Shanghai First People's Hospital, Shanghai Jiaotong University School of MedicineShanghai, China
| | - Ye Xiong
- Department of Respiratory Medicine, Changhai Hospital, Second Military Medical UniversityShanghai, China
| | - Qiang Li
- Department of Respiratory Medicine, Shanghai First People's Hospital, Shanghai Jiaotong University School of MedicineShanghai, China
| | - Hong Yang
- Department of Respiratory Medicine, Shanghai First People's Hospital, Shanghai Jiaotong University School of MedicineShanghai, China
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21
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Bengtson S, Knudsen KB, Kyjovska ZO, Berthing T, Skaug V, Levin M, Koponen IK, Shivayogimath A, Booth TJ, Alonso B, Pesquera A, Zurutuza A, Thomsen BL, Troelsen JT, Jacobsen NR, Vogel U. Differences in inflammation and acute phase response but similar genotoxicity in mice following pulmonary exposure to graphene oxide and reduced graphene oxide. PLoS One 2017; 12:e0178355. [PMID: 28570647 PMCID: PMC5453440 DOI: 10.1371/journal.pone.0178355] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 05/11/2017] [Indexed: 12/15/2022] Open
Abstract
We investigated toxicity of 2–3 layered >1 μm sized graphene oxide (GO) and reduced graphene oxide (rGO) in mice following single intratracheal exposure with respect to pulmonary inflammation, acute phase response (biomarker for risk of cardiovascular disease) and genotoxicity. In addition, we assessed exposure levels of particulate matter emitted during production of graphene in a clean room and in a normal industrial environment using chemical vapour deposition. Toxicity was evaluated at day 1, 3, 28 and 90 days (18, 54 and 162 μg/mouse), except for GO exposed mice at day 28 and 90 where only the lowest dose was evaluated. GO induced a strong acute inflammatory response together with a pulmonary (Serum-Amyloid A, Saa3) and hepatic (Saa1) acute phase response. rGO induced less acute, but a constant and prolonged inflammation up to day 90. Lung histopathology showed particle agglomerates at day 90 without signs of fibrosis. In addition, DNA damage in BAL cells was observed across time points and doses for both GO and rGO. In conclusion, pulmonary exposure to GO and rGO induced inflammation, acute phase response and genotoxicity but no fibrosis.
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Affiliation(s)
- Stefan Bengtson
- National Research Centre for the Working Environment, Copenhagen Ø, Denmark
- Department of Science and Environment, Roskilde University, Roskilde, Denmark
| | | | - Zdenka O. Kyjovska
- National Research Centre for the Working Environment, Copenhagen Ø, Denmark
| | - Trine Berthing
- National Research Centre for the Working Environment, Copenhagen Ø, Denmark
| | - Vidar Skaug
- National Institute of Occupational Health, Oslo, Norway
| | - Marcus Levin
- National Research Centre for the Working Environment, Copenhagen Ø, Denmark
| | - Ismo K. Koponen
- National Research Centre for the Working Environment, Copenhagen Ø, Denmark
| | - Abhay Shivayogimath
- Department of Micro- and Nanotechnology, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Timothy J. Booth
- Department of Micro- and Nanotechnology, Technical University of Denmark, Kgs. Lyngby, Denmark
| | | | | | | | - Birthe L. Thomsen
- National Research Centre for the Working Environment, Copenhagen Ø, Denmark
| | - Jesper T. Troelsen
- Department of Science and Environment, Roskilde University, Roskilde, Denmark
| | | | - Ulla Vogel
- National Research Centre for the Working Environment, Copenhagen Ø, Denmark
- Department of Micro- and Nanotechnology, Technical University of Denmark, Kgs. Lyngby, Denmark
- * E-mail:
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22
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Chand HS, Mebratu YA, Montera M, Tesfaigzi Y. T cells suppress memory-dependent rapid mucous cell metaplasia in mouse airways. Respir Res 2016; 17:132. [PMID: 27765038 PMCID: PMC5073838 DOI: 10.1186/s12931-016-0446-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Accepted: 10/05/2016] [Indexed: 12/19/2022] Open
Abstract
Background Airway epithelial cells (AECs) are crucial for mucosal and adaptive immunity but whether these cells respond in a memory-dependent manner is poorly studied. Previously, we have reported that LPS intratracheal instillation in rodents causes extensive neutrophilic inflammation and airway epithelial cell hyperplasia accompanied by mucous cell metaplasia (MCM). And the resolution process required a period of 40 d for the inflammation to subside and the lung epithelia to resemble the non-exposed condition. Therefore, the present study investigated the memory-dependent response of airway epithelial cells to a secondary LPS challenge after the initial inflammation was resolved. Methods Airway epithelial and mucous cells were assessed in response to a secondary LPS challenge in F344/N rats, and in C57BL/6 wild-type (Foxn1WT) and T cell-deficient athymic (Foxn1nu) mice that were instilled with LPS or saline 40 d earlier. Epithelial expression of TLR4, EGFR, and phosphorylated-ERK1/2 (pERK) were also analyzed. Results LPS-pretreated F344/N rats responded with elevated numbers of AECs after saline challenge and with 3-4-fold increased MCM following the LPS challenge in LPS- compared with saline-pretreated rats. LPS-pretreated rats showed 5-fold higher number of AECs expressing TLR4 apically than saline-pretreated rats. Also, the expression of EGFR was increased in LPS-pretreated rats along with the number of AECs with active or nuclear pERK, and the levels were further increased upon LPS challenge. LPS-pretreated Foxn1nu compared with Foxn1WT mice showed increased MCM and elevated levels of TLR4, EGFR, and nuclear pERK at 40 d after LPS instillation. LPS challenge further augmented MCM rapidly in Foxn1nu compared with Foxn1WT mice. Conclusion Together, these data suggest that AECs preserve an ‘innate memory’ that drives a rapid mucous phenotype via spatiotemporal regulation of TLR4 and EGFR. Further, T cells may suppress the sustained elevated expression of TLR4 and EGFR and thereby the hyperactive epithelial response. Electronic supplementary material The online version of this article (doi:10.1186/s12931-016-0446-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hitendra S Chand
- COPD Program, Lovelace Respiratory Research Institute, Albuquerque, NM, 87108, USA. .,Present Address: Department of Immunology, Herbert Wertheim College of Medicine, Florida International University, 11200 SW 8th St, Miami, FL, 33199, USA.
| | - Yohannes A Mebratu
- COPD Program, Lovelace Respiratory Research Institute, Albuquerque, NM, 87108, USA
| | - Marena Montera
- COPD Program, Lovelace Respiratory Research Institute, Albuquerque, NM, 87108, USA
| | - Yohannes Tesfaigzi
- COPD Program, Lovelace Respiratory Research Institute, Albuquerque, NM, 87108, USA
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Zhao J, Yu H, Liu Y, Gibson SA, Yan Z, Xu X, Gaggar A, Li PK, Li C, Wei S, Benveniste EN, Qin H. Protective effect of suppressing STAT3 activity in LPS-induced acute lung injury. Am J Physiol Lung Cell Mol Physiol 2016; 311:L868-L880. [PMID: 27638904 PMCID: PMC5130536 DOI: 10.1152/ajplung.00281.2016] [Citation(s) in RCA: 120] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 09/06/2016] [Indexed: 01/26/2023] Open
Abstract
Acute lung injury (ALI) and acute respiratory distress syndrome (ARDS) are diseases with high mortality. Macrophages and neutrophils are responsible for inflammatory responses in ALI and ARDS, which are characterized by excessive production of proinflammatory mediators in bronchoalveolar lavage fluid (BALF) and plasma. Aberrant activation of the JAK/STAT pathway is critical for persistent inflammation in many conditions such as infection and autoimmunity. Given the importance of the STAT3 transcription factor in activating macrophages and neutrophils and augmenting inflammation, we investigated the therapeutic potential of inhibiting STAT3 activity using the small-molecule STAT3 inhibitor, LLL12. Our results demonstrate that LPS induces STAT3 activation in macrophages in vitro and in CD45+CD11b+ cells from BALF in the LPS-induced ALI model in vivo. LLL12 treatment inhibits LPS-induced lung inflammation in the ALI model, which is accompanied by suppression of LPS-induced STAT3 activation and an inhibition of macrophage and inflammatory cell infiltration in lung and BALF. LLL12 treatment also suppresses expression of proinflammatory genes including IL-1β, IL-6, TNF-α, iNOS, CCL2, and MHC class II in macrophages and inflammatory cells from BALF and serum as determined by ELISA. Furthermore, hyperactivation of STAT3 in LysMCre-SOCS3fl/fl mice accelerates the severity of inflammation in the ALI model. Both pre- and post-LPS treatment with LLL12 decrease LPS-induced inflammatory responses in mice with ALI. Importantly, LLL12 treatment attenuates STAT3 phosphorylation in human peripheral blood mononuclear cells induced by plasma from patients with ARDS, which suggests the feasibility of targeting the STAT3 pathway therapeutically for patients with ALI and ARDS.
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Affiliation(s)
- Jiping Zhao
- Department of Respiratory Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China.,Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Hao Yu
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Yudong Liu
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Sara A Gibson
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Zhaoqi Yan
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Xin Xu
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama.,Birmingham VA Medical Center, University of Alabama at Birmingham, Birmingham, Alabama.,Program in Protease and Matrix Biology, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - Amit Gaggar
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama.,Birmingham VA Medical Center, University of Alabama at Birmingham, Birmingham, Alabama.,Program in Protease and Matrix Biology, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - Pui-Kai Li
- Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, Ohio State University, Columbus, Ohio
| | - Chenglong Li
- Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, Ohio State University, Columbus, Ohio
| | - Shi Wei
- Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Etty N Benveniste
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Hongwei Qin
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama;
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Zakeri A, Yazdi FG. Toll-like receptor-mediated involvement of innate immune cells in asthma disease. Biochim Biophys Acta Gen Subj 2016; 1861:3270-3277. [PMID: 27543676 DOI: 10.1016/j.bbagen.2016.08.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 08/15/2016] [Indexed: 12/12/2022]
Abstract
BACKGROUND Innate immune cells as the first line of defense are adept at recognizing and triggering appropriate response against various pathogens. Apart from the protective functions, the innate immunity plays an essential role in mediation of allergic responses. Dendritic cells (DCs) and airway epithelial cells (AECs) along with other innate cells such as granulocytes, natural killer cells (NKs), natural killer T cells (NKTs), and alternatively activated macrophages (AAMs) are able to orchestrate allergic responses, especially asthma. Chronic stimulation of TLRs by airway stimuli induces local inflammation which gradually results in the recruitment and settling of innate cells around airways. SCOPE OF REVIEW This review discusses how recruitment and accumulation of the inflammatory cells in the site of insult facilitate hypersensitivity reactions and initiate airway inflammation. We indicate that these cells are well equipped to highly sensitive receptors known as toll-like receptors (TLRs) making them fit to prime adaptive immune response. Based on emerging findings, we highlight the pivotal role of TLRs in regulation of innate cells function in the context of asthma disease. MAJOR CONCLUSIONS Stimulation of the TLRs of innate cells by allergens has been found to accelerate and regulate allergic airway inflammation. In fact, the sophisticated interaction between environmental allergens and TLRs leads to release of various pro-inflammatory mediators from innate cells supporting asthma development. GENERAL SIGNIFICANCE This review highlights that TLRs have a substantial role in priming innate cells and cytokine release, suggesting that the involvement of TLRs of innate immune cells can modulate the function of these cells in asthma disease.
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Affiliation(s)
- Amin Zakeri
- Immunology Section, Department of Pathobiology, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.
| | - Fariba Ghiamati Yazdi
- Department of Food Science and Technology, Faculty of Agriculture, Isfahan University of Technology, Isfahan 84156, Iran
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25
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Zakeri A, Borji H, Haghparast A. Interaction Between Helminths and Toll-Like Receptors: Possibilities and Potentials for Asthma Therapy. Int Rev Immunol 2016; 35:219-48. [PMID: 27120222 DOI: 10.3109/08830185.2015.1096936] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Toll-like receptors (TLRs) are essential components of the innate immune system. They play an important role in the pathogenesis of allergic diseases, especially asthma. Since TLRs significantly orchestrate innate and adaptive immune response, their manipulation has widely been considered as a potential approach to control asthma symptoms. It is well established that helminths have immunoregulatory effects on host immune responses, especially innate immunity. They release bioactive molecules such as excretory-secretory (ES) products manipulating TLRs expression and signaling. Thus, given the promising results derived from preclinical studies, harnessing helminth-derived molecules affecting TLRs can be considered as a potential biological therapy for allergic diseases. Prospectively, the data that are available at present suggest that, in the near future, it is possible that helminth antigens will offer new therapeutic strategies and druggable targets for fighting allergic diseases. This review describes the interactions between helminths and TLRs and discusses the potential possibilities for asthma therapy. In this opinion paper, the authors aimed to review the updated literatures on the interplay between helminths, TLRs, and asthma with a view to proposing helminth-based asthma therapy.
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Affiliation(s)
- Amin Zakeri
- a Parasitology Section, Department of Pathobiology , Faculty of Veterinary Medicine, Ferdowsi University of Mashhad , Mashhad , Iran.,b Immunology Sections, Department of Pathobiology, Faculty of Veterinary Medicine , Faculty of Veterinary Medicine, Ferdowsi University of Mashhad , Mashhad , Iran
| | - Hassan Borji
- a Parasitology Section, Department of Pathobiology , Faculty of Veterinary Medicine, Ferdowsi University of Mashhad , Mashhad , Iran
| | - Alireza Haghparast
- b Immunology Sections, Department of Pathobiology, Faculty of Veterinary Medicine , Faculty of Veterinary Medicine, Ferdowsi University of Mashhad , Mashhad , Iran.,c Biotechnology Section, Department of Pathobiology , Faculty of Veterinary Medicine, Ferdowsi University of Mashhad , Mashhad , Iran
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26
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Hadebe S, Kirstein F, Fierens K, Chen K, Drummond RA, Vautier S, Sajaniemi S, Murray G, Williams DL, Redelinghuys P, Reinhart TA, Fallert Junecko BA, Kolls JK, Lambrecht BN, Brombacher F, Brown GD. Microbial Ligand Costimulation Drives Neutrophilic Steroid-Refractory Asthma. PLoS One 2015; 10:e0134219. [PMID: 26261989 PMCID: PMC4532492 DOI: 10.1371/journal.pone.0134219] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Accepted: 07/07/2015] [Indexed: 12/14/2022] Open
Abstract
Asthma is a heterogeneous disease whose etiology is poorly understood but is likely to involve innate responses to inhaled microbial components that are found in allergens. The influence of these components on pulmonary inflammation has been largely studied in the context of individual agonists, despite knowledge that they can have synergistic effects when used in combination. Here we have explored the effects of LPS and β-glucan, two commonly-encountered microbial agonists, on the pathogenesis of allergic and non-allergic respiratory responses to house dust mite allergen. Notably, sensitization with these microbial components in combination acted synergistically to promote robust neutrophilic inflammation, which involved both Dectin-1 and TLR-4. This pulmonary neutrophilic inflammation was corticosteroid-refractory, resembling that found in patients with severe asthma. Thus our results provide key new insights into how microbial components influence the development of respiratory pathology.
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Affiliation(s)
- Sabelo Hadebe
- Aberdeen Fungal Group, Infection, Immunity and Inflammation Programme, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Science, University of Cape Town, South Africa
| | - Frank Kirstein
- International Centre for Genetic Engineering and Biotechnology and Division of Immunology, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Science, University of Cape Town, South Africa
| | - Kaat Fierens
- VIB Inflammation Research Center, Laboratory of Immunoregulation and Mucosal Immunology, University Ghent, Ghent, Belgium
| | - Kong Chen
- Department of Paediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Rebecca A. Drummond
- Aberdeen Fungal Group, Infection, Immunity and Inflammation Programme, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Science, University of Cape Town, South Africa
| | - Simon Vautier
- Aberdeen Fungal Group, Infection, Immunity and Inflammation Programme, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Science, University of Cape Town, South Africa
| | - Sara Sajaniemi
- Aberdeen Fungal Group, Infection, Immunity and Inflammation Programme, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Science, University of Cape Town, South Africa
| | - Graeme Murray
- Pathology, Division of Applied Medicine, Institute of Medical Sciences, Foresterhill, University of Aberdeen, Aberdeen, United Kingdom
| | - David L. Williams
- Department of Surgery and Center for Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, United States of America
| | - Pierre Redelinghuys
- Aberdeen Fungal Group, Infection, Immunity and Inflammation Programme, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Science, University of Cape Town, South Africa
| | - Todd A. Reinhart
- Department of Infectious Diseases and Microbiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Beth A. Fallert Junecko
- Department of Infectious Diseases and Microbiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Jay K. Kolls
- Department of Paediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Bart N. Lambrecht
- VIB Inflammation Research Center, Laboratory of Immunoregulation and Mucosal Immunology, University Ghent, Ghent, Belgium
- Department of Pulmonary Medicine, ErasmusMC, Rotterdam, The Netherlands
| | - Frank Brombacher
- International Centre for Genetic Engineering and Biotechnology and Division of Immunology, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Science, University of Cape Town, South Africa
| | - Gordon D. Brown
- Aberdeen Fungal Group, Infection, Immunity and Inflammation Programme, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Science, University of Cape Town, South Africa
- * E-mail:
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Lipopolysaccharide (LPS) exposure differently affects allergic asthma exacerbations and its amelioration by intranasal curcumin in mice. Cytokine 2015; 76:334-342. [PMID: 26239413 DOI: 10.1016/j.cyto.2015.07.022] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 07/04/2015] [Accepted: 07/27/2015] [Indexed: 12/20/2022]
Abstract
AIM Lipopolysaccharide (LPS) is ubiquitous in the environment and can therefore, exacerbate allergic responses. Studies have suggested immunoregulatory effects of LPS according to route, dose and stage of exposure. Present study has examined whether dose and stage of LPS exposure (during sensitization and challenge with OVA) exacerbates airway inflammations, antigen specific-IgE level, histamine release, Th1/Th2 cytokine response. Further, anti-asthmatic potential of curcumin, through intranasal route has been evaluated for the first time in LPS induced airway inflammation in an ovalbumin (OVA)-challenged mouse asthma model. METHODS Balb/c mice were first sensitized with OVA on 1st and 8th day and exposed to two LPS doses (0.1/1.0 μg) separately on 2nd day and then further exposed to LPS with OVA-aerosol (from 9 to 14 day). Further, lower LPS dose (0.1 μg) was chosen for OVA exposed mouse model of asthma exacerbation study. Intranasal curcumin was administered from 9th to 14th day before every LPS exposure. RESULTS Exposure to LPS (0.1 μg) exacerbates airway inflammations in terms of IgE level, Th2-cytokine response (IL-4 and IL-5), histamine release, EPO and MPO activities and oxidative stress. Intranasal curcumin has effectively ameliorated airway exacerbations whereas dexamethasone, a known glucocorticosteroid, was not promising as compared to intranasal curcumin. CONCLUSION Schedule and dose of LPS exposure determines asthma exacerbations and intranasal curcumin could be better immunomodulatory agent in LPS exposed asthma exacerbations.
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28
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Sun XJ, Li XQ, Wang XL, Tan WF, Wang JK. Sevoflurane inhibits nuclear factor-κB activation in lipopolysaccharide-induced acute inflammatory lung injury via toll-like receptor 4 signaling. PLoS One 2015; 10:e0122752. [PMID: 25875290 PMCID: PMC4397052 DOI: 10.1371/journal.pone.0122752] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 02/13/2015] [Indexed: 11/24/2022] Open
Abstract
Background Infection is a common cause of acute lung injury (ALI). This study was aimed to explore whether Toll-like receptors 4 (TLR4) of airway smooth muscle cells (ASMCs) play a role in lipopolysaccharide (LPS)-induced airway hyperresponsiveness and potential mechanisms. Methods In vivo: A sensitizing dose of LPS (50 µg) was administered i.p. to female mice before anesthesia with either 3% sevoflurane or phenobarbital i.p. After stabilization, the mice were challenged with 5 µg of intratracheal LPS to mimic inflammatory attack. The effects of sevoflurane were assessed by measurement of airway responsiveness to methacholine, histological examination, and IL-1, IL-6, TNF-α levels in bronchoalveolar lavage fluid (BALF). Protein and gene expression of TLR4 and NF-κB were also assessed. In vitro: After pre-sensitization of ASMCs and ASM segments for 24h, levels of TLR4 and NF-κB proteins in cultured ASMCs were measured after continuous LPS exposure for 1, 3, 5, 12 and 24h in presence or absence of sevoflurane. Constrictor and relaxant responsiveness of ASM was measured 24 h afterwards. Results The mRNA and protein levels of NF-κB and TLR4 in ASM were increased and maintained at high level after LPS challenge throughout 24h observation period, both in vivo and in vitro. Sevoflurane reduced LPS-induced airway hyperresponsiveness, lung inflammatory cell infiltration and proinflammatory cytokines release in BALF as well as maximal isometric contractile force of ASM segments to acetylcholine, but it increased maximal relaxation response to isoproterenol. Treatment with specific NF-κB inhibitor produced similar protections as sevoflurane, including decreased expressions of TLR4 and NF-κB in cultured ASMCs and improved pharmacodynamic responsiveness of ASM to ACh and isoproterenol. Conclusions This study demonstrates the crucial role of TLR4 activation in ASMCs during ALI in response to LPS. Sevoflurane exerts direct relaxant and anti-inflammatory effects in vivo and in vitro via inhibition of TLR4/NF-κB pathway.
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Affiliation(s)
- Xi Jia Sun
- Department of Anesthesiology, First Affiliated Hospital, China Medical University, Shenyang 110001, Liaoning, China
| | - Xiao Qian Li
- Department of Anesthesiology, First Affiliated Hospital, China Medical University, Shenyang 110001, Liaoning, China
| | - Xiao Long Wang
- Department of Anesthesiology, First Affiliated Hospital, China Medical University, Shenyang 110001, Liaoning, China
| | - Wen Fei Tan
- Department of Anesthesiology, First Affiliated Hospital, China Medical University, Shenyang 110001, Liaoning, China
| | - Jun Ke Wang
- Department of Anesthesiology, First Affiliated Hospital, China Medical University, Shenyang 110001, Liaoning, China
- * E-mail:
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29
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Lowe APP, Thomas RS, Nials AT, Kidd EJ, Broadley KJ, Ford WR. LPS exacerbates functional and inflammatory responses to ovalbumin and decreases sensitivity to inhaled fluticasone propionate in a guinea pig model of asthma. Br J Pharmacol 2015; 172:2588-603. [PMID: 25586266 PMCID: PMC4409909 DOI: 10.1111/bph.13080] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 12/03/2014] [Accepted: 01/06/2015] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND AND PURPOSE Asthma exacerbations contribute to corticosteroid insensitivity. LPS is ubiquitous in the environment. It causes bronchoconstriction and airway inflammation and may therefore exacerbate allergen responses. This study examined whether LPS and ovalbumin co-administration could exacerbate the airway inflammatory and functional responses to ovalbumin in conscious guinea pigs and whether these exacerbated responses were insensitive to inhaled corticosteroid treatment with fluticasone propionate (FP). EXPERIMENTAL APPROACH Guinea pigs were sensitized and challenged with ovalbumin and airway function recorded as specific airway conductance by whole body plethysmography. Airway inflammation was measured from lung histology and bronchoalveolar lavage. Airway hyper-reactivity (AHR) to inhaled histamine was examined 24 h after ovalbumin. LPS was inhaled alone or 24 or 48 h before ovalbumin and combined with ovalbumin. FP (0.05-1 mg·mL(-1) ) or vehicle was nebulized for 15 min twice daily for 6 days before ovalbumin or LPS exposure. KEY RESULTS Ovalbumin inhalation caused early (EAR) and late asthmatic response (LAR), airway hyper-reactivity to histamine and influx of inflammatory cells into the lungs. LPS 48 h before and co-administered with ovalbumin exacerbated the response with increased length of the EAR, prolonged response to histamine and elevated inflammatory cells. FP 0.5 and 1 mg·mL(-1) reduced the LAR, AHR and cell influx with ovalbumin alone, but was ineffective when guinea pigs were exposed to LPS before and with ovalbumin. CONCLUSIONS AND IMPLICATIONS LPS exposure exacerbates airway inflammatory and functional responses to allergen inhalation and decreases corticosteroid sensitivity. Its widespread presence in the environment could contribute to asthma exacerbations and corticosteroid insensitivity in humans.
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Affiliation(s)
- A P P Lowe
- Cardiff School of Pharmacy, Cardiff University, Cardiff, UK
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30
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Concomitant exposure to ovalbumin and endotoxin augments airway inflammation but not airway hyperresponsiveness in a murine model of asthma. PLoS One 2014; 9:e98648. [PMID: 24968337 PMCID: PMC4072597 DOI: 10.1371/journal.pone.0098648] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Accepted: 05/06/2014] [Indexed: 11/19/2022] Open
Abstract
Varying concentrations of lipopolysaccharide (LPS) in ovalbumin (OVA) may influence the airway response to allergic sensitization and challenge. We assessed the contribution of LPS to allergic airway inflammatory responses following challenge with LPS-rich and LPS-free commercial OVA. BALB/c mice were sensitized with LPS-rich OVA and alum and then underwent challenge with the same OVA (10 µg intranasally) or an LPS-free OVA. Following challenge, bronchoalveolar lavage (BAL), airway responsiveness to methacholine and the lung regulatory T cell population (Treg) were assessed. Both OVA preparations induced BAL eosinophilia but LPS-rich OVA also evoked BAL neutrophilia. LPS-free OVA increased interleukin (IL)-2, IL-4 and IL-5 whereas LPS-rich OVA additionally increased IL-1β, IL-12, IFN-γ, TNF-α and KC. Both OVA-challenged groups developed airway hyperresponsiveness. TLR4-deficient mice challenged with either OVA preparation showed eosinophilia but not neutrophilia and had increased IL-5. Only LPS-rich OVA challenged mice had increased lung Tregs and LPS-rich OVA also induced in vitro Treg differentiation. LPS-rich OVA also induced a Th1 cytokine response in human peripheral blood mononuclear cells.We conclude that LPS-rich OVA evokes mixed Th1, Th2 and innate immune responses through the TLR-4 pathway, whereas LPS-free OVA evokes only a Th2 response. Contaminating LPS is not required for induction of airway hyperresponsiveness but amplifies the Th2 inflammatory response and is a critical mediator of the neutrophil, Th1 and T regulatory cell responses to OVA.
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McFadden J, Basketter D, Dearman R, Puangpet P, Kimber I. The hapten-atopy hypothesis III: the potential role of airborne chemicals. Br J Dermatol 2014; 170:45-51. [DOI: 10.1111/bjd.12602] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/20/2013] [Indexed: 01/02/2023]
Affiliation(s)
- J.P. McFadden
- St John's Institute of Dermatology; King's College; St Thomas’ Hospital; London SE1 7EH U.K
| | | | - R.J. Dearman
- Faculty of Life Sciences; University of Manchester; Manchester U.K
| | | | - I. Kimber
- Faculty of Life Sciences; University of Manchester; Manchester U.K
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Hougaard KS, Jackson P, Kyjovska ZO, Birkedal RK, De Temmerman PJ, Brunelli A, Verleysen E, Madsen AM, Saber AT, Pojana G, Mast J, Marcomini A, Jensen KA, Wallin H, Szarek J, Mortensen A, Vogel U. Effects of lung exposure to carbon nanotubes on female fertility and pregnancy. A study in mice. Reprod Toxicol 2013; 41:86-97. [DOI: 10.1016/j.reprotox.2013.05.006] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 05/15/2013] [Accepted: 05/17/2013] [Indexed: 12/13/2022]
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Differential regulation of inflammation and immunity in mild and severe experimental asthma. Mediators Inflamm 2013; 2013:808470. [PMID: 23781124 PMCID: PMC3679512 DOI: 10.1155/2013/808470] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Revised: 03/15/2013] [Accepted: 04/04/2013] [Indexed: 11/24/2022] Open
Abstract
This study aimed at exploring innate and adaptive immunity in allergic asthma by investigation of mRNA expression of pattern recognition receptors, T-cell-specific cytokines, and transcription factors. Mouse models for mild and severe asthma, with similar pathological characteristics observed in humans, were used to study the involved inflammatory markers as a first step in the development of phenotype-directed treatment approaches. In the mild model, mice were sensitized to ovalbumin-Imject Alum and challenged with ovalbumin. In the severe model, mice were sensitized to trinitrophenyl-conjugated ovalbumin and challenged with trinitrophenyl-ovalbumin/IgE immune complex. Pulmonary airway inflammation and mRNA expression of Toll-like receptors (TLRs), NOD-like receptors (NLRs), T cell cytokines, and transcription factors in lung tissue were examined. Different mRNA expression profiles of TLRs, NLRs, T cell cytokines, and transcription factors were observed. In the mild model, Il10 showed the largest increase in expression, whereas in the severe model, it was Infγ with the largest increase. Expression of Tbet was also significantly increased in the severe model. Inflammation and immunity are differentially regulated in mild and severe experimental asthma. This preclinical data may help in directing clinical research towards a better understanding and therapy in mild and severe asthmatic patients.
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Blockade of Airway Inflammation by Kaempferol via Disturbing Tyk-STAT Signaling in Airway Epithelial Cells and in Asthmatic Mice. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 2013:250725. [PMID: 23737822 PMCID: PMC3662111 DOI: 10.1155/2013/250725] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 03/28/2013] [Accepted: 04/15/2013] [Indexed: 12/11/2022]
Abstract
Asthma is characterized by bronchial inflammation causing increased airway hyperresponsiveness and eosinophilia. The interaction between airway epithelium and inflammatory mediators plays a key role in the asthmatic pathogenesis. The in vitro study elucidated inhibitory effects of kaempferol, a flavonoid found in apples and many berries, on inflammation in human airway epithelial BEAS-2B cells. Nontoxic kaempferol at ≤20 μM suppressed the LPS-induced IL-8 production through the TLR4 activation, inhibiting eotaxin-1 induction. The in vivo study explored the demoting effects of kaempferol on asthmatic inflammation in BALB/c mice sensitized with ovalbumin (OVA). Mouse macrophage inflammatory protein-2 production and CXCR2 expression were upregulated in OVA-challenged mice, which was attenuated by oral administration of ≥10 mg/kg kaempferol. Kaempferol allayed the airway tissue levels of eotaxin-1 and eotaxin receptor CCR3 enhanced by OVA challenge. This study further explored the blockade of Tyk-STAT signaling by kaempferol in both LPS-stimulated BEAS-2B cells and OVA-challenged mice. LPS activated Tyk2 responsible for eotaxin-1 induction, while kaempferol dose-dependently inhibited LPS- or IL-8-inflamed Tyk2 activation. Similar inhibition of Tyk2 activation by kaempferol was observed in OVA-induced mice. Additionally, LPS stimulated the activation of STAT1/3 signaling concomitant with downregulated expression of Tyk-inhibiting SOCS3. In contrast, kaempferol encumbered STAT1/3 signaling with restoration of SOCS3 expression. Consistently, oral administration of kaempferol blocked STAT3 transactivation elevated by OVA challenge. These results demonstrate that kaempferol alleviated airway inflammation through modulating Tyk2-STAT1/3 signaling responsive to IL-8 in endotoxin-exposed airway epithelium and in asthmatic mice. Therefore, kaempferol may be a therapeutic agent targeting asthmatic diseases.
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Sumoza-Toledo A, Fleig A, Penner R. TRPM2 channels are not required for acute airway inflammation in OVA-induced severe allergic asthma in mice. JOURNAL OF INFLAMMATION-LONDON 2013; 10:19. [PMID: 23631390 PMCID: PMC3648402 DOI: 10.1186/1476-9255-10-19] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2013] [Accepted: 04/23/2013] [Indexed: 11/23/2022]
Abstract
Background Airway inflammation and asthma have been linked to oxidative stress and the melastatin-related transient receptor potential cation channel, member 2 (TRPM2), which can be activated by reactive oxygen species (ROS), has emerged as a potential therapeutic target for inflammatory diseases. Objective Using TRPM2 deficient (TRPM2-/-) mice, we investigated whether the TRPM2 ion channel, which mediates calcium (Ca2+) influx and lysosomal Ca2+ release, plays a role in the pathophysiology of severe allergic asthma in mouse. Methods Severe allergic asthma was initiated in wild type (WT) and TRPM2-/- mice by repeated sensitization with ovalbumin (OVA)/aluminum hydroxide on Days 0, 7 and 14, followed by intranasal challenge on Days 21, 22 and 23. Mice were investigated for the presence of airway responsiveness, airway inflammation, production of allergen-specific antibodies, cytokine response and lung pathology. Results The absence of TRPM2 channels has no obvious effect on major etiologic markers of severe allergic asthma in this mouse model. Neither airway resistance nor mucus production are affected in TRPM2-/- mice. TRPM2 channel ablation also does not alter airway inflammation or immunocyte infiltration and does not affect antibody response or cytokine levels. Conclusions TRPM2 is not required for airway inflammation in OVA-induced severe allergic asthma in mice. Accordingly, TRPM2 might not be a suitable therapeutic target for airway inflammation caused by allergens in humans.
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Affiliation(s)
- Adriana Sumoza-Toledo
- Laboratory for Cellular and Molecular Signaling, Center for Biomedical Research at The Queen's Medical Center and John A, Burns School of Medicine, University of Hawai'i, 1301 Punchbowl St, Honolulu, HI, 96813, USA.
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Antagonism of the histamine H4 receptor reduces LPS-induced TNF production in vivo. Inflamm Res 2013; 62:599-607. [PMID: 23532396 PMCID: PMC3654183 DOI: 10.1007/s00011-013-0612-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Revised: 11/16/2012] [Accepted: 03/06/2013] [Indexed: 12/13/2022] Open
Abstract
Objective Antagonism of the histamine H4 receptor (H4R) has been shown to be anti-inflammatory in a number of preclinical disease models, however the exact mechanisms behind this are still being uncovered. In vitro, the receptor interacts with TLR and impacts inflammatory mediator production from a number of different cell types. Here it is shown that this interaction also occurs in vivo. Materials and methods Wild-type and H4R deficient BALB/c mice received an i.p. injection of LPS in PBS in conjunction with p.o. JNJ 7777120 or JNJ 28307474 (H4R antagonists). Two hours later blood was collected and TNF was measured. Results Two different H4R antagonists inhibited LPS-induced TNF production in mice and this production was also reduced in H4R-deficient mice. The TNF mRNA analysis showed that the major source of the cytokine was the liver and not blood, and that the H4R antagonist only reduced the expression levels in the liver. Depletion or inactivation of macrophages reduced the TNF levels and eliminated the H4R sensitivity. Treatment with an H4R antagonist also reduced LPS-induced liver injury and blocked LPS-enhanced lung inflammation in mice. Conclusion The data support an interaction between H4R and TLR activation in vivo that can drive inflammatory responses. Electronic supplementary material The online version of this article (doi:10.1007/s00011-013-0612-5) contains supplementary material, which is available to authorized users.
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Wu CJ, Chou HW, Liou CJ, Shen JJ, Wang LC, Kuo ML. Prophylactic vaccination with adjuvant monophosphoryl lipid a prevents Th2-mediated murine asthmatic responses. J Asthma 2013; 50:327-33. [PMID: 23343407 DOI: 10.3109/02770903.2013.769268] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
OBJECTIVE Asthma is a chronic respiratory disorder characterized by airway hyperreactivity, eosinophilic infiltration, high titer of allergen-specific IgE, and overproduction of T helper 2 (Th2) cytokines. Antigen combined with an appropriate adjuvant and administrated through the proper route can elicit suitable immunological responses to protect humans and animals from diseases. Antigen formulated with monophosphoryl lipid A (MPLA) can produce priming of Th1-mediated immune responses. The purpose of this study was to examine the utility of MPLA as an adjuvant to prevent asthma. METHODS BALB/c mice were immunized with ovalbumin (OVA) formulated with or without MPLA by intraperitoneal, footpad, or subcutaneous injection. Vaccinated mice were challenged with OVA aerosol to estimate the protective efficacy of MPLA in comparison to Th2-adjuvant aluminum hydroxide (Alum). Airway hyperresponsiveness to methacholine, eosinophilia in bronchoalveolar lavage fluid (BALF), circulating titers of OVA-specific antibodies, and stimulating levels of IFN-γ and IL-4 cytokines from splenocytes were evaluated. RESULTS Mice immunized by all injection routes with OVA formulated with MPLA increased the ratio of Th1/Th2 responses compared to mice receiving antigen alone. For prophylactic vaccination purpose, MPLA reduced airway responsiveness and eosinophilic inflammation in the lung, decreased serum OVA-specific IgE level, and increased the serum ratio of OVA-specific IgG2a/IgG1 and the ratio of IFN-γ/IL4 from OVA-activated splenocytes compared with mice vaccinated with Alum. CONCLUSION MPLA may be clinically useful in the vaccination of individuals predisposed to asthma.
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Affiliation(s)
- Cheng-Jang Wu
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
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Bezemer GFG, Sagar S, van Bergenhenegouwen J, Georgiou NA, Garssen J, Kraneveld AD, Folkerts G. Dual role of Toll-like receptors in asthma and chronic obstructive pulmonary disease. Pharmacol Rev 2012; 64:337-58. [PMID: 22407613 DOI: 10.1124/pr.111.004622] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
During the last decade, significant research has been focused on Toll-like receptors (TLRs) in the pathogenesis of airway diseases. TLRs are pattern recognition receptors that play pivotal roles in the detection of and response to pathogens. Because of the involvement of TLRs in innate and adaptive immunity, these receptors are currently being exploited as possible targets for drug development. Asthma and chronic obstructive pulmonary disease (COPD) are chronic inflammatory airway diseases in which innate and adaptive immunity play an important role. To date, asthma is the most common chronic disease in children aged 5 years and older. COPD is prevalent amongst the elderly and is currently the fifth-leading cause of death worldwide with still-growing prevalence. Both of these inflammatory diseases result in shortness of breath, which is treated, often ineffectively, with bronchodilators and glucocorticosteroids. Symptomatic treatment approaches are similar for both diseases; however, the underlying immunological mechanisms differ greatly. There is a clear need for improved treatment specific for asthma and for COPD. This review provides an update on the role of TLRs in asthma and in COPD and discusses the merits and difficulties of targeting these proteins as novel treatment strategies for airway diseases. TLR agonist, TLR adjuvant, and TLR antagonist therapies could all be argued to be effective in airway disease management. Because of a possible dual role of TLRs in airway diseases with shared symptoms and risk factors but different immunological mechanisms, caution should be taken while designing pulmonary TLR-based therapies.
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Affiliation(s)
- Gillina F G Bezemer
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, The Netherlands.
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Bourdon JA, Saber AT, Jacobsen NR, Jensen KA, Madsen AM, Lamson JS, Wallin H, Møller P, Loft S, Yauk CL, Vogel UB. Carbon black nanoparticle instillation induces sustained inflammation and genotoxicity in mouse lung and liver. Part Fibre Toxicol 2012; 9:5. [PMID: 22300514 PMCID: PMC3293019 DOI: 10.1186/1743-8977-9-5] [Citation(s) in RCA: 131] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2011] [Accepted: 02/02/2012] [Indexed: 01/10/2023] Open
Abstract
Background Widespread occupational exposure to carbon black nanoparticles (CBNPs) raises concerns over their safety. CBNPs are genotoxic in vitro but less is known about their genotoxicity in various organs in vivo. Methods We investigated inflammatory and acute phase responses, DNA strand breaks (SB) and oxidatively damaged DNA in C57BL/6 mice 1, 3 and 28 days after a single instillation of 0.018, 0.054 or 0.162 mg Printex 90 CBNPs, alongside sham controls. Bronchoalveolar lavage (BAL) fluid was analyzed for cellular composition. SB in BAL cells, whole lung and liver were assessed using the alkaline comet assay. Formamidopyrimidine DNA glycosylase (FPG) sensitive sites were assessed as an indicator of oxidatively damaged DNA. Pulmonary and hepatic acute phase response was evaluated by Saa3 mRNA real-time quantitative PCR. Results Inflammation was strongest 1 and 3 days post-exposure, and remained elevated for the two highest doses (i.e., 0.054 and 0.162 mg) 28 days post-exposure (P < 0.001). SB were detected in lung at all doses on post-exposure day 1 (P < 0.001) and remained elevated at the two highest doses until day 28 (P < 0.05). BAL cell DNA SB were elevated relative to controls at least at the highest dose on all post-exposure days (P < 0.05). The level of FPG sensitive sites in lung was increased throughout with significant increases occurring on post-exposure days 1 and 3, in comparison to controls (P < 0.001-0.05). SB in liver were detected on post-exposure days 1 (P < 0.001) and 28 (P < 0.001). Polymorphonuclear (PMN) cell counts in BAL correlated strongly with FPG sensitive sites in lung (r = 0.88, P < 0.001), whereas no such correlation was observed with SB (r = 0.52, P = 0.08). CBNP increased the expression of Saa3 mRNA in lung tissue on day 1 (all doses), 3 (all doses) and 28 (0.054 and 0.162 mg), but not in liver. Conclusions Deposition of CBNPs in lung induces inflammatory and genotoxic effects in mouse lung that persist considerably after the initial exposure. Our results demonstrate that CBNPs may cause genotoxicity both in the primary exposed tissue, lung and BAL cells, and in a secondary tissue, the liver.
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Affiliation(s)
- Julie A Bourdon
- Health Canada, Environmental and Radiation Health Sciences Directorate, Mechanistic Studies Division, Tunney's Pasture, Ottawa, Canada
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Kurowski M, Majkowska-Wojciechowska B, Wardzyńska A, Kowalski ML. Associations of allergic sensitization and clinical phenotypes with innate immune response genes polymorphisms are modified by house dust mite allergen exposure. Arch Med Sci 2011; 7:1029-36. [PMID: 22328887 PMCID: PMC3264996 DOI: 10.5114/aoms.2011.26616] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2011] [Revised: 03/15/2011] [Accepted: 04/09/2011] [Indexed: 11/29/2022] Open
Abstract
INTRODUCTION Polymorphisms within innate immunity genes are associated with allergic phenotypes but results are variable. These associations were not analyzed with respect to allergen exposure. We investigated associations of TLR and CD14 polymorphisms with allergy phenotypes in the context of house dust mite (HDM) exposure. MATERIAL AND METHODS Children, aged 12-16 years (n=326), were recruited from downtown and rural locations and assessed by allergist. Skin prick tests, total and HDM-specific sIgE measurements were done. HDM allergen concentrations in dust were measured. Genetic polymorphisms were identified using restriction fragment length polymorphism (RFLP). RESULTS Allergic rhinitis, asthma and atopy were more prevalent in urban area. Although HDM allergen concentrations were higher in rural households, sIgE were present more frequently in urban children. In the whole population no association was found between HDM exposure and sensitization. In children with CD14/-159CC, CD14/-159TT and TLR9/2848GA genotypes increased exposure to HDM was associated with reduced incidence of allergic rhinitis. Significant associations of increased HDM exposure with reduced incidence of atopy were found for the whole population and subjects with CD14/-159CC, CD14/-1359GT, TLR4/896AA and TLR9/2848GA genotypes. Among children with CD14/-159CC and CD14/-1359GG significant positive correlation between HDM allergen concentrations in household and sensitization to HDM was observed. In contrast, protective effect of high HDM allergen exposure against specific sensitization was seen in subjects with TLR4/896 AG. CONCLUSIONS Development of specific sensitization and allergy may be associated with innate immune response genes polymorphisms and is modified by allergen exposure.
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Affiliation(s)
- Marcin Kurowski
- Department of Immunology, Rheumatology and Allergy, Medical University of Lodz, Poland
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Essilfie AT, Simpson JL, Horvat JC, Preston JA, Dunkley ML, Foster PS, Gibson PG, Hansbro PM. Haemophilus influenzae infection drives IL-17-mediated neutrophilic allergic airways disease. PLoS Pathog 2011; 7:e1002244. [PMID: 21998577 PMCID: PMC3188527 DOI: 10.1371/journal.ppat.1002244] [Citation(s) in RCA: 132] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2010] [Accepted: 07/13/2011] [Indexed: 12/20/2022] Open
Abstract
A subset of patients with stable asthma has prominent neutrophilic and reduced eosinophilic inflammation, which is associated with attenuated airways hyper-responsiveness (AHR). Haemophilus influenzae has been isolated from the airways of neutrophilic asthmatics; however, the nature of the association between infection and the development of neutrophilic asthma is not understood. Our aim was to investigate the effects of H. influenzae respiratory infection on the development of hallmark features of asthma in a mouse model of allergic airways disease (AAD). BALB/c mice were intraperitoneally sensitized to ovalbumin (OVA) and intranasally challenged with OVA 12-15 days later to induce AAD. Mice were infected with non-typeable H. influenzae during or 10 days after sensitization, and the effects of infection on the development of key features of AAD were assessed on day 16. T-helper 17 cells were enumerated by fluorescent-activated cell sorting and depleted with anti-IL-17 neutralizing antibody. We show that infection in AAD significantly reduced eosinophilic inflammation, OVA-induced IL-5, IL-13 and IFN-γ responses and AHR; however, infection increased airway neutrophil influx in response to OVA challenge. Augmented neutrophilic inflammation correlated with increased IL-17 responses and IL-17 expressing macrophages and neutrophils (early, innate) and T lymphocytes (late, adaptive) in the lung. Significantly, depletion of IL-17 completely abrogated infection-induced neutrophilic inflammation during AAD. In conclusion, H. influenzae infection synergizes with AAD to induce Th17 immune responses that drive the development of neutrophilic and suppress eosinophilic inflammation during AAD. This results in a phenotype that is similar to neutrophilic asthma. Infection-induced neutrophilic inflammation in AAD is mediated by IL-17 responses.
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Affiliation(s)
- Ama-Tawiah Essilfie
- Centre for Asthma and Respiratory Diseases and Hunter Medical Research Institute, The University of Newcastle, Newcastle, New South Wales, Australia
| | - Jodie L. Simpson
- Centre for Asthma and Respiratory Diseases and Hunter Medical Research Institute, The University of Newcastle, Newcastle, New South Wales, Australia
- Department of Respiratory and Sleep Medicine, John Hunter Hospital, New Lambton, New South Wales, Australia
| | - Jay C. Horvat
- Centre for Asthma and Respiratory Diseases and Hunter Medical Research Institute, The University of Newcastle, Newcastle, New South Wales, Australia
| | - Julie A. Preston
- Centre for Asthma and Respiratory Diseases and Hunter Medical Research Institute, The University of Newcastle, Newcastle, New South Wales, Australia
| | - Margaret L. Dunkley
- Centre for Asthma and Respiratory Diseases and Hunter Medical Research Institute, The University of Newcastle, Newcastle, New South Wales, Australia
- Hunter Immunology, Newcastle, Australia
| | - Paul S. Foster
- Centre for Asthma and Respiratory Diseases and Hunter Medical Research Institute, The University of Newcastle, Newcastle, New South Wales, Australia
| | - Peter G. Gibson
- Centre for Asthma and Respiratory Diseases and Hunter Medical Research Institute, The University of Newcastle, Newcastle, New South Wales, Australia
- Department of Respiratory and Sleep Medicine, John Hunter Hospital, New Lambton, New South Wales, Australia
| | - Philip M. Hansbro
- Centre for Asthma and Respiratory Diseases and Hunter Medical Research Institute, The University of Newcastle, Newcastle, New South Wales, Australia
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Hongjia L, Qingling G, Meiying L, Weixuan W, Lihong Z, Yongsheng G, Yanli L, Jinxiang W, Liang D. House dust mite regulate the lung inflammation of asthmatic mice through TLR4 pathway in airway epithelial cells. Cell Biochem Funct 2011; 28:597-603. [PMID: 20941750 DOI: 10.1002/cbf.1697] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Aberrant innate and adaptive immune responsed to allergens and environmental pollutants lead to respiratory allergic disease such as asthma. In this study, we focused on toll-like receptor-4 (TLR4) expressed on airway epithelium to identify house dust mite (HDM)-regulated allergic inflammation via TLR4 signaling pathway and the triggering to alveolar macrophages (AM)-driven adaptive immune response. The authors found that mouse exposed to HDM showed more eosinophils, neutrophils, monocytes, lymphocytes as well as total cells in bronchoalveolar lavage fluid (BALF) confirmed by flow cytometry. Besides, the expression of TLR4 in airway epithelial cells was significantly increased in both mRNA and protein levels in mice treated with HDM and the expression of CD40 and CD86 in AM was also increased in mice exposed to HDM. Tight correlation between TLR4 protein and CD40, CD86 in AM was identified. This study demonstrates that TLR4 expression on airway epithelium played an essential role in HDM-induced activation of AM in immune responses and allergic inflammation. The airway epithelial TLR4 signaling pathway revealed tight connection between endotoxin exposure and asthma prevalence in the clinic.
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Affiliation(s)
- Li Hongjia
- Shandong provincial chest hospital, Jinan, China
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McFadden JP, Dearman RJ, White JML, Basketter DA, Kimber I. The Hapten-Atopy hypothesis II: the ‘cutaneous hapten paradox’. Clin Exp Allergy 2011; 41:327-37. [DOI: 10.1111/j.1365-2222.2010.03684.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Duechs MJ, Hahn C, Benediktus E, Werner-Klein M, Braun A, Hoymann HG, Gantner F, Erb KJ. TLR agonist mediated suppression of allergic responses is associated with increased innate inflammation in the airways. Pulm Pharmacol Ther 2010; 24:203-14. [PMID: 21195789 DOI: 10.1016/j.pupt.2010.12.009] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Revised: 11/30/2010] [Accepted: 12/23/2010] [Indexed: 12/16/2022]
Abstract
Toll-like receptor (TLR) mediated signaling induces pro-inflammatory responses and can both suppress and exacerbate allergic responses in the airways. The aim of our study was to directly compare the efficacy of different TLR agonists in inhibiting or exacerbating the development of Th2-mediated responses in the airways and investigate if the suppressive effects were associated with increased pro-inflammatory responses. Mice were immunized on day 0, 14 and 21 by intraperitoneal injection of ovalbumin/alum and exposed to ovalbumin aerosol on day 26 and 27. TLR2, TLR3, TLR4, TLR7 and TLR9 agonists (0.001, 0.01, 0.1, or 1 mg/kg) were administered intratracheally 1 h before each allergen exposure. Both the TLR7 and TLR9 agonists dose dependently reduced airway eosinophilia, while the TLR3 agonist only reduced airway eosinophilia at a dose of 1.0 mg/kg. The TLR2 and TLR4 agonists potentiated eosinophilia. All TLR agonists enhanced neutrophil numbers at doses as low as 0.01 mg/kg, in particular TLR2 and TLR4 agonists. TLR7 and TLR9 agonists also significantly reduced IL-4 and IL-5 levels and all TLR agonists, with the exception of TLR7, enhanced the amount IL-1β, IL-6, and TNF-α detected in the whole lung lavage. Only application of TLR9 agonist induced detectable levels of IL-10 in the lung. Suppressive effects of the TLR agonists were not dependent upon IFN-γ and IL-10 or associated with increased numbers of Foxp3(+)CD4(+) Tr cells in the lavage fluid. Airway resistance was reduced significantly only when TLR7 agonist was administered. When applied therapeutically 2 days after allergen exposure, all TLR agonists, except TLR2, similarly reduced airway eosinophilia and IL-4 levels. Taken together our results show that TLR7 agonists had the strongest anti-asthmatic effects with the lowest pro-inflammatory potential, suggesting that activating TLR7 may have the greatest potential to treat allergic disorders in humans.
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Affiliation(s)
- Matthias J Duechs
- Pulmonary Diseases Research, Boehringer Ingelheim Pharma GmbH & Co KG, H91-02-01, Birkendorferstr 65, D-88397 Biberach ad Riss, Germany
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Burgess STG, Frew D, Nunn F, Watkins CA, McNeilly TN, Nisbet AJ, Huntley JF. Transcriptomic analysis of the temporal host response to skin infestation with the ectoparasitic mite Psoroptes ovis. BMC Genomics 2010; 11:624. [PMID: 21067579 PMCID: PMC3091762 DOI: 10.1186/1471-2164-11-624] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Accepted: 11/10/2010] [Indexed: 11/20/2022] Open
Abstract
Background Infestation of ovine skin with the ectoparasitic mite Psoroptes ovis results in a rapid cutaneous immune response, leading to the crusted skin lesions characteristic of sheep scab. Little is known regarding the mechanisms by which such a profound inflammatory response is instigated and to identify novel vaccine and drug targets a better understanding of the host-parasite relationship is essential. The main objective of this study was to perform a combined network and pathway analysis of the in vivo skin response to infestation with P. ovis to gain a clearer understanding of the mechanisms and signalling pathways involved. Results Infestation with P. ovis resulted in differential expression of 1,552 genes over a 24 hour time course. Clustering by peak gene expression enabled classification of genes into temporally related groupings. Network and pathway analysis of clusters identified key signalling pathways involved in the host response to infestation. The analysis implicated a number of genes with roles in allergy and inflammation, including pro-inflammatory cytokines (IL1A, IL1B, IL6, IL8 and TNF) and factors involved in immune cell activation and recruitment (SELE, SELL, SELP, ICAM1, CSF2, CSF3, CCL2 and CXCL2). The analysis also highlighted the influence of the transcription factors NF-kB and AP-1 in the early pro-inflammatory response, and demonstrated a bias towards a Th2 type immune response. Conclusions This study has provided novel insights into the signalling mechanisms leading to the development of a pro-inflammatory response in sheep scab, whilst providing crucial information regarding the nature of mite factors that may trigger this response. It has enabled the elucidation of the temporal patterns by which the immune system is regulated following exposure to P. ovis, providing novel insights into the mechanisms underlying lesion development. This study has improved our existing knowledge of the host response to P. ovis, including the identification of key parallels between sheep scab and other inflammatory skin disorders and the identification of potential targets for disease control.
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Affiliation(s)
- Stewart T G Burgess
- Moredun Research Institute, Pentlands Science Park, Bush Loan, Edinburgh, Midlothian, EH26 0PZ, Scotland, UK.
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Toll-like receptors (TLRs) and Nod-like receptors (NLRs) in inflammatory disorders. Semin Immunol 2009; 21:242-53. [PMID: 19748439 DOI: 10.1016/j.smim.2009.06.005] [Citation(s) in RCA: 217] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Accepted: 06/30/2009] [Indexed: 12/15/2022]
Abstract
Toll-like receptors (TLRs) and Nod-like receptors (NLRs) are two major forms of innate immune sensors, which provide immediate responses against pathogenic invasion or tissue injury. Activation of these sensors induces the recruitment of innate immune cells such as macrophages and neutrophils, initiates tissue repair processes, and results in adaptive immune activation. Abnormalities in any of these innate sensor-mediated processes may cause excessive inflammation due to either hyper responsive innate immune signaling or sustained compensatory adaptive immune activation. Recent gene association studies appear to reveal strong associations of NLR gene mutations and development of several idiopathic inflammatory disorders. In contrast, TLR polymorphisms are less often associated with inflammatory disorders. Nevertheless, TLRs are up-regulated in the affected tissue of most inflammatory disorders, suggesting TLR signaling is involved in the pathogenesis of chronic and/or idiopathic inflammatory disorders. NLR signaling results in the formation of a molecular scaffold complex (termed an inflammasome) and orchestrates with TLRs to induce IL-1beta and IL-18, both of which are important mediators in the majority of inflammatory disorders. Therefore, understanding the roles of TLRs and NLRs in the pathogenesis of chronic and idiopathic inflammatory disorders may provide novel targets for the prevention and/or treatment of many common and uncommon diseases involving inflammation.
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