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Doyen V, Gautrin D, Vandenplas O, Malo JL. Comparison of high- and low-molecular-weight sensitizing agents causing occupational asthma: an evidence-based insight. Expert Rev Clin Immunol 2024; 20:635-653. [PMID: 38235552 DOI: 10.1080/1744666x.2024.2306885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Accepted: 01/15/2024] [Indexed: 01/19/2024]
Abstract
INTRODUCTION The many substances used at the workplace that can cause sensitizer-induced occupational asthma are conventionally categorized into high-molecular-weight (HMW) agents and low-molecular-weight (LMW) agents, implying implicitly that these two categories of agents are associated with distinct phenotypic profiles and pathophysiological mechanisms. AREAS COVERED The authors conducted an evidence-based review of available data in order to identify the similarities and differences between HMW and LMW sensitizing agents. EXPERT OPINION Compared with LMW agents, HMW agents are associated with a few distinct clinical features (i.e. concomitant work-related rhinitis, incidence of immediate asthmatic reactions and increase in fractional exhaled nitric oxide upon exposure) and risk factors (i.e. atopy and smoking). However, some LMW agents may exhibit 'HMW-like' phenotypic characteristics, indicating that LMW agents are a heterogeneous group of agents and that pooling them into a single group may be misleading. Regardless of the presence of detectable specific IgE antibodies, both HMW and LMW agents are associated with a mixed Th1/Th2 immune response and a predominantly eosinophilic pattern of airway inflammation. Large-scale multicenter studies are needed that use objective diagnostic criteria and assessment of airway inflammatory biomarkers to identify the pathobiological pathways involved in OA caused by the various non-protein agents.
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Affiliation(s)
- Virginie Doyen
- Department of Chest Medicine, Centre Hospitalier Universitaire UCL Namur, Université Catholique de Louvain, Yvoir, Belgium
| | - Denyse Gautrin
- Université de Montréal and Hôpital du Sacré-Cœur de Montréal, Montréal, Canada
| | - Olivier Vandenplas
- Department of Chest Medicine, Centre Hospitalier Universitaire UCL Namur, Université Catholique de Louvain, Yvoir, Belgium
| | - Jean-Luc Malo
- Université de Montréal and Hôpital du Sacré-Cœur de Montréal, Montréal, Canada
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Lin CC, Law BF, Hettick JM. 4,4'-Methylene diphenyl diisocyanate exposure induces expression of alternatively activated macrophage-associated markers and chemokines partially through Krüppel-like factor 4 mediated signaling in macrophages. Xenobiotica 2023; 53:653-669. [PMID: 38014489 DOI: 10.1080/00498254.2023.2284867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 11/12/2023] [Indexed: 11/29/2023]
Abstract
Occupational exposure to the most widely used monomeric diisocyanate (dNCO), 4,4'-methylene diphenyl diisocyanate (MDI), may lead to the development of occupational asthma (OA). Alveolar macrophages with alternatively activated (M2) phenotype have been implicated in allergic airway responses and the pathogenesis of asthma. Recent in vivo studies demonstrate that M2 macrophage-associated markers and chemokines are induced by MDI-exposure, however, the underlying molecular mechanism(s) by which this proceeds is unclear.Following MDI exposure (in vivo and in vitro) M2 macrophage-associated transcription factors (TFs), markers, and chemokines were determined by RT-qPCR, western blots, and ELISA.Expression of M2 macrophage-associated TFs and markers including Klf4/KLF4, Cd206/CD206, Tgm2/TGM2, Ccl17/CCL17, Ccl22/CCL22, and CCL24 were induced by MDI/MDI-GSH exposure in bronchoalveolar lavage cells (BALCs)/THP-1 macrophages. The expression of CD206, TGM2, CCL17, CCL22, and CCL24 are upregulated by 3.83-, 7.69-, 6.22-, 6.08-, and 1.90-fold in KLF4-overexpressed macrophages, respectively. Endogenous CD206 and TGM2 were downregulated by 1.65-5.17-fold, and 1.15-1.78-fold, whereas CCL17, CCL22, and CCL24 remain unchanged in KLF4-knockdown macrophages. Finally, MDI-glutathione (GSH) conjugate-treated macrophages show increased chemotactic ability to T-cells and eosinophils, which may be attenuated by KLF4 knockdown.Our data suggest that MDI exposure may induce M2 macrophage-associated markers partially through induction of KLF4.
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Affiliation(s)
- Chen-Chung Lin
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia, USA
| | - Brandon F Law
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia, USA
| | - Justin M Hettick
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia, USA
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Lin CC, Law BF, Hettick JM. MicroRNA-mediated calcineurin signaling activation induces CCL2, CCL3, CCL5, IL8, and chemotactic activities in 4,4'-methylene diphenyl diisocyanate exposed macrophages. Xenobiotica 2021; 51:1436-1452. [PMID: 34775880 DOI: 10.1080/00498254.2021.2005851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Occupational exposure to 4,4'-methylene diphenyl diisocyanate (MDI), the most widely used monomeric diisocyanate, is one of the leading causes of occupational asthma (OA). Previously, we identified microRNA (miR)-206-3p/miR-381-3p-mediated PPP3CA/calcineurin signalling regulated iNOS transcription in macrophages and bronchoalveolar lavage cells (BALCs) after acute MDI exposure; however, whether PPP3CA/calcineurin signalling participates in regulation of other asthma-associated mediators secreted by macrophages/BALCs after MDI exposure is unknown.Several asthma-associated, macrophage-secreted mediator mRNAs from MDI exposed murine BALCs and MDI-glutathione (GSH) conjugate treated differentiated THP-1 macrophages were analysed using RT-qPCR.Endogenous IL1B, TNF, CCL2, CCL3, CCL5, and TGFB1 were upregulated in MDI or MDI-GSH conjugate exposed BALCs and macrophages, respectively. Calcineurin inhibitor tacrolimus (FK506) attenuated the MDI-GSH conjugate-mediated induction of CCL2, CCL3, CCL5, and CXCL8/IL8 but not others. Transfection of either miR-inhibitor-206-3p or miR-inhibitor-381-3p in macrophages induced chemokine CCL2, CCL3, CCL5, and CXCL8 transcription, whereas FK506 attenuated the miR-inhibitor-206-3p or miR-inhibitor-381-3p-mediated effects. Finally, MDI-GSH conjugate treated macrophages showed increased chemotactic ability to various immune cells, which may be attenuated by FK506.In conclusion, these results indicate that MDI exposure to macrophages/BALCs may recruit immune cells into the airway via induction of chemokines by miR-206-3p and miR-381-3p-mediated calcineurin signalling activation.
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Affiliation(s)
- Chen-Chung Lin
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - Brandon F Law
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - Justin M Hettick
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV, USA
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Lee HY, Ye YM, Kim SH, Ban GY, Kim SC, Kim JH, Shin YS, Park HS. Identification of phenotypic clusters of nonsteroidal anti-inflammatory drugs exacerbated respiratory disease. Allergy 2017; 72:616-626. [PMID: 27805264 DOI: 10.1111/all.13075] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/28/2016] [Indexed: 01/08/2023]
Abstract
BACKGROUND Clinical presentation of nonsteroidal anti-inflammatory drugs exacerbated respiratory disease (NERD) is found to be heterogeneous. This study classified phenotypic clusters to determine NERD subtypes. METHODS We performed two-step cluster analysis using urticaria, chronic rhinosinusitis (CRS), and atopy, in a NERD cohort comprising 302 patients. Asthma exacerbation was defined as receiving at least one burst of intravenous steroid treatment and/or at least two bursts of oral steroid use (≥ 45 mg/3 days) per year. The possession rate of anti-asthmatic medications was estimated during the follow-up period. RESULTS There were four subtypes: subtype 1 (NERD with CRS/atopy and no urticaria), subtype 2 (NERD with CRS and no urticaria/atopy), subtype 3 (NERD without CRS/urticaria), and subtype 4 (NERD with urticaria). Significant differences were found between the four subtypes in the female proportion, baseline FEV1%, serum total IgE level, and sputum/peripheral eosinophil count. A higher frequency of asthma exacerbations was noted in subtype 1 compared to subtype 3. The possession rates of medium- to high-dose inhaled corticosteroids/long-acting beta2 -agonists showed significant differences among the four subtypes. Metabolomic analysis showed that the four subtypes of NERD had a higher serum leukotriene E4 (LTE4) level than those with aspirin-tolerant asthma. The patients with subtypes 1 and 3 had a higher urine LTE4 level than those with subtype 2. CONCLUSION We found four distinct subtypes with different clinical/biochemical findings and asthma exacerbations in a NERD cohort. These findings suggest that stratified strategies by applying subtype classification may help achieve better outcomes in the management of NERD.
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Affiliation(s)
- H. Y. Lee
- Department of Statistics; Clinical Trial Center; Ajou University Medical Center; Suwon Korea
| | - Y. M. Ye
- Department of Allergy and Clinical Immunology; Ajou University School of Medicine; Suwon Korea
| | - S. H. Kim
- Department of Allergy and Clinical Immunology; Ajou University School of Medicine; Suwon Korea
| | - G. Y. Ban
- Department of Allergy and Clinical Immunology; Ajou University School of Medicine; Suwon Korea
| | - S. C. Kim
- Department of Statistics; Clinical Trial Center; Ajou University Medical Center; Suwon Korea
| | - J. H. Kim
- Department of Allergy and Clinical Immunology; Ajou University School of Medicine; Suwon Korea
| | - Y. S. Shin
- Department of Allergy and Clinical Immunology; Ajou University School of Medicine; Suwon Korea
| | - H. S. Park
- Department of Statistics; Clinical Trial Center; Ajou University Medical Center; Suwon Korea
- Department of Allergy and Clinical Immunology; Ajou University School of Medicine; Suwon Korea
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Ban GY, Yang EM, Kim JH, Shin YS, Ye YM, Nahm DH, Park HS. Favorable outcome of omalizumab treatment in a patient with idiopathic anaphylaxis. ALLERGY ASTHMA & RESPIRATORY DISEASE 2015. [DOI: 10.4168/aard.2015.3.5.380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Ga-Young Ban
- Department of Allergy and Clinical Immunology, Ajou University Hospital, Ajou University School of Medicine, Suwon, Korea
| | - Eun-Mi Yang
- Department of Allergy and Clinical Immunology, Ajou University Hospital, Ajou University School of Medicine, Suwon, Korea
| | - Ji-Hye Kim
- Department of Allergy and Clinical Immunology, Ajou University Hospital, Ajou University School of Medicine, Suwon, Korea
| | - Yoo-Seob Shin
- Department of Allergy and Clinical Immunology, Ajou University Hospital, Ajou University School of Medicine, Suwon, Korea
| | - Young-Min Ye
- Department of Allergy and Clinical Immunology, Ajou University Hospital, Ajou University School of Medicine, Suwon, Korea
| | - Dong-Ho Nahm
- Department of Allergy and Clinical Immunology, Ajou University Hospital, Ajou University School of Medicine, Suwon, Korea
| | - Hae-Sim Park
- Department of Allergy and Clinical Immunology, Ajou University Hospital, Ajou University School of Medicine, Suwon, Korea
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Kim JE, Jung KH, Cho HH, Kang H, Park YM, Park HJ, Lee JY. The significance of hypersensitivity to autologous sweat and serum in cholinergic urticaria: cholinergic urticaria may have different subtypes. Int J Dermatol 2014; 54:771-7. [DOI: 10.1111/ijd.12549] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Revised: 08/08/2013] [Accepted: 10/13/2013] [Indexed: 11/27/2022]
Affiliation(s)
- Jung Eun Kim
- Department of Dermatology; College of Medicine; The Catholic University of Korea; Seoul Korea
| | - Kwan Ho Jung
- Department of Dermatology; College of Medicine; The Catholic University of Korea; Seoul Korea
| | - Hyun Hee Cho
- Department of Dermatology; College of Medicine; The Catholic University of Korea; Seoul Korea
| | - Hoon Kang
- Department of Dermatology; College of Medicine; The Catholic University of Korea; Seoul Korea
| | - Young Min Park
- Department of Dermatology; College of Medicine; The Catholic University of Korea; Seoul Korea
| | - Hyun Jeong Park
- Department of Dermatology; College of Medicine; The Catholic University of Korea; Seoul Korea
| | - Jun Young Lee
- Department of Dermatology; College of Medicine; The Catholic University of Korea; Seoul Korea
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Yoo HS, Yang EM, Kim MA, Hwang SH, Shin YS, Ye YM, Nahm DH, Park HS. A Case of Codeine Induced Anaphylaxis via Oral Route. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2014; 6:95-7. [PMID: 24404400 PMCID: PMC3881408 DOI: 10.4168/aair.2014.6.1.95] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Revised: 11/26/2012] [Accepted: 12/20/2012] [Indexed: 12/20/2022]
Abstract
Codeine is widely prescribed in clinical settings for the relief of pain and non-productive coughs. Common adverse drug reactions to codeine include constipation, euphoria, nausea, and drowsiness. However, there have been few reports of serious adverse reactions after codeine ingestion in adults. Here, we present a case of severe anaphylaxis after oral ingestion of a therapeutic dose of codeine. A 30-year-old Korean woman complained of the sudden onset of dyspnea, urticaria, chest tightness, and dizziness 10 minutes after taking a 10-mg dose of codeine to treat a chronic cough following a viral infection. She had previously experienced episodes of asthma exacerbation following upper respiratory infections, and had non-atopic rhinitis and a food allergy to seafood. A skin prick test showed a positive response to 1-10 mg/mL of codeine extract, with a mean wheal size of 3.5 mm, while negative results were obtained in 3 healthy adult controls. A basophil histamine release test showed a notable dose-dependent increase in histamine following serial incubations with codeine phosphate, while there were minimal changes in the healthy controls. Following a CYP2D6 genotype analysis, the patient was found to have the CYP2D6*1/*10 allele, indicating she was an intermediate metabolizer. An open label oral challenge test was positive. To the best of our knowledge, this is the first report of a patient presenting with severe anaphylaxis after the ingestion of a therapeutic dose of codeine, which may be mediated by the direct release of histamine by basophils following exposure to codeine.
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Affiliation(s)
- Hye-Soo Yoo
- Department of Allergy & Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
| | - Eun-Mi Yang
- Department of Allergy & Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
| | - Mi-Ae Kim
- Department of Allergy & Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
| | - Sun-Hyuk Hwang
- Department of Allergy & Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
| | - Yoo-Seob Shin
- Department of Allergy & Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
| | - Young-Min Ye
- Department of Allergy & Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
| | - Dong-Ho Nahm
- Department of Allergy & Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
| | - Hae-Sim Park
- Department of Allergy & Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
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Wisnewski AV, Liu J, Redlich CA. Connecting glutathione with immune responses to occupational methylene diphenyl diisocyanate exposure. Chem Biol Interact 2013; 205:38-45. [PMID: 23791970 PMCID: PMC3767171 DOI: 10.1016/j.cbi.2013.06.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Revised: 05/12/2013] [Accepted: 06/03/2013] [Indexed: 02/04/2023]
Abstract
Methylene diphenyl diisocyanate (MDI) is among the leading chemical causes of occupational asthma world-wide, however, the mechanisms of disease pathogenesis remain unclear. This study tests the hypothesis that glutathione (GSH) reacts with MDI to form quasi-stable conjugates, capable of mediating the formation of MDI-conjugated "self" protein antigens, which may participate in pathogenic inflammatory responses. To test this hypothesis, an occupationally relevant dose of MDI (0.1%w/v) was reacted with varying concentrations of GSH (10μM-10mM), and the reaction products were characterized with regard to mass/structure, and ability to carbamoylate human albumin, a major carrier protein for MDI in vivo. LC-MS/MS analysis of GSH-MDI reaction products identified products possessing the exact mass of previously described S-linked bis(GSH)-MDI and its partial hydrolysis product, as well as novel cyclized GSH-MDI structures. Upon co-incubation of GSH-MDI reaction products with human albumin, MDI was rapidly transferred to specific lysines of albumin, and the protein's native conformation/charge was altered, based on electrophoretic mobility. Three types of modification were observed, intra-molecular MDI cross-linking, addition of partially hydrolyzed MDI, and addition of "MDI-GSH", where MDI's 2nd NCO had reacted with GSH's "N-terminus". Importantly, human albumin carbamoylated by GSH-MDI was specifically recognized by serum IgG from MDI exposed workers, with binding dependent upon the starting GSH concentration, pH, and NaCl levels. Together, the data define a non-enzymatic, thiol-mediated transcarbamoylating mechanism by which GSH may promote immune responses to MDI exposure, and identify specific factors that might further modulate this process.
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Affiliation(s)
- Adam V Wisnewski
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA.
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Induced Sputum, Exhaled Nitric Oxide, and Particles in Exhaled Air in Assessing Airways Inflammation in Occupational Exposures. Clin Chest Med 2012; 33:771-82. [DOI: 10.1016/j.ccm.2012.08.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Mori T, Tanimoto Y, Ota M, Masakado T, Kitamoto S, Saito K, Isobe N, Kaneko H. Comparison of cytokine profiles in bronchoalveolar lavage fluid of mice exposed to respiratory and contact sensitizers. J Toxicol Sci 2012; 37:337-43. [DOI: 10.2131/jts.37.337] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Takashi Mori
- Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd
| | | | - Mika Ota
- Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd
| | - Takaomi Masakado
- Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd
| | - Sachiko Kitamoto
- Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd
| | - Koichi Saito
- Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd
| | - Naohiko Isobe
- Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd
| | - Hideo Kaneko
- Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd
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Castano R, Malo JL. Occupational rhinitis and asthma: where do we stand, where do we go? Curr Allergy Asthma Rep 2010; 10:135-42. [PMID: 20425505 DOI: 10.1007/s11882-010-0092-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This review provides an overview of current and emerging issues regarding occupational rhinitis (OR) and occupational asthma (OA), focusing on studies discussing concepts and results that are relevant to both diseases. OA and OR are conditions that affect the upper and lower airways, are characterized by reduced airway caliber and hyperresponsiveness and by inflammation, and are caused by agents present in the workplace. To explain disease expression, research is moving from the T-helper type 1/type 2 cells paradigm to consider the contribution of diverse alternative pathways such as neural inflammation, a dysfunctional epithelial barrier, and autoimmune mechanisms, among others. Objective assessment of OR and OA has been improved and tested for research and, currently, clinical application. Further developments in the field of OR are expected to lead to more generalized clinical applications, following the example of what has been achieved for OA.
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Affiliation(s)
- Roberto Castano
- Department of Otolaryngology/Research Center, Hôpital du Sacré-Coeur de Montréal, 5400 Boulevard Gouin Ouest, J-3185, Montréal, Québec, H4J 1C5, Canada.
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Current world literature. Curr Opin Allergy Clin Immunol 2010; 10:87-92. [PMID: 20026987 DOI: 10.1097/aci.0b013e3283355458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Affiliation(s)
- G-Y Hur
- Department of Internal Medicine, Korea University, College of Medicine, Seoul 152-703, Korea
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Kim DY, Park JW, Jeoung D, Ro JY. Celastrol suppresses allergen-induced airway inflammation in a mouse allergic asthma model. Eur J Pharmacol 2009; 612:98-105. [PMID: 19356734 DOI: 10.1016/j.ejphar.2009.03.078] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2008] [Revised: 12/15/2008] [Accepted: 03/25/2009] [Indexed: 12/29/2022]
Abstract
Celastrol has anti-inflammatory and immunomodulatory activities, but its anti-allergic effects remain poorly understood. Therefore, we aimed to investigate the ability of celastrol to inhibit asthmatic reactions in a mouse allergic asthma model. BALB/c mice were sensitized and challenged with ovalbumin to induce asthma. We measured the recruitment of inflammatory cells into the bronchoalveolar lavage fluid or lung tissues by Diff-Quik and hematoxylin and eosin staining, respectively, goblet cell hyperplasia by periodic acid-Schiff (PAS) staining, airway hyperresponsiveness by Flexvent system, mRNA and protein expression of cytokines, matrix metalloproteinases (MMPs) and tissue inhibitor of metalloproteinases (TIMPs) by reverse transcriptase polymerase chain reaction and ELISA, respectively, and the activities of mitogen-activated protein (MAP) kinases and nuclear factor-kappa B (NF-kappaB) in the bronchoalveolar lavage cells and lung tissues by Western blot and electrophoretic mobility shift assay (EMSA), respectively. Celastrol reduced the total number of inflammatory cells in the bronchoalveolar lavage fluid and in peribronchial areas, and decreased the airway hyperresponsiveness, mRNA and protein expression levels for inflammatory cytokines such as interleukin (IL)-4, IL-13, TNF-alpha and IFN-gamma, and for MMPs and TIMPs, MAP kinases and NF-kappaB activities in the bronchoalveolar lavage cells and in the lung tissues increased in ovalbumin-induced allergic asthma in mice. Our data suggest that oral administration of celastrol suppresses ovalbumin-induced airway inflammation, hyperresponsiveness, and tissue remodeling by regulating the imbalance of MMP-2/-9 and TIMP-1/-2 by inflammatory cytokines via MAP kinases/NF-kappaB in inflammatory cells. Based on our findings, we suggest that celastrol may be used as a therapeutic agent for allergy-induced asthma.
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Affiliation(s)
- Dae Yong Kim
- Department of Pharmacology and Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon 440-746, Republic of Korea
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