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Vijeyakumaran M, Jawhri MA, Fortunato J, Solomon L, Shrestha Palikhe N, Vliagoftis H, Cameron L. Dual activation of estrogen receptor alpha and glucocorticoid receptor upregulate CRTh2-mediated type 2 inflammation; mechanism driving asthma severity in women? Allergy 2023; 78:767-779. [PMID: 36207765 DOI: 10.1111/all.15543] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 07/20/2022] [Accepted: 08/10/2022] [Indexed: 11/01/2022]
Abstract
BACKGROUND Type 2-high asthma is characterized by elevated levels of circulating Th2 cells and eosinophils, cells that express chemoattractant-homologous receptor expressed on Th2 cells (CRTh2). Severe asthma is more common in women than men; however, the underlying mechanism(s) remain elusive. Here we examined whether the relationship between severe asthma and type 2 inflammation differs by sex and if estrogen influences Th2 cell response to glucocorticoid (GC). METHODS Type 2 inflammation and the proportion of blood Th2 cells (CD4+ CRTh2+ ) were assessed in whole blood from subjects with asthma (n = 66). The effects of GC and estrogen receptor alpha (ERα) agonist on in vitro differentiated Th2 cells were examined. Expression of CRTh2, type 2 cytokines and degree of apoptosis (Annexin V+ , 7-AAD) were determined by flow cytometry, qRT-PCR, western blot and ELISA. RESULTS In severe asthma, the proportion of circulating Th2 cells and hospitalizations were higher in women than men. Women with severe asthma also had more Th2 cells and serum IL-13 than women with mild/moderate asthma. Th2 cells, eosinophils and CRTh2 mRNA correlated with clinical characteristics associated with asthma control in women but not men. In vitro, GC and ERα agonist treated Th2 cells exhibited less apoptosis, more CRTh2 as well as IL-5 and IL-13 following CRTh2 activation than Th2 cells treated with GC alone. CONCLUSION Women with severe asthma had higher levels of circulating Th2 cells than men, which may be due to estrogen modifying the effects of GC, enhancing Th2 cell survival and type 2 cytokine production.
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Affiliation(s)
- Meerah Vijeyakumaran
- Department of Pathology and Laboratory Medicine, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada
| | - MohdWessam Al Jawhri
- Department of Pathology and Laboratory Medicine, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada
| | - Jenna Fortunato
- Department of Pathology and Laboratory Medicine, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada
| | - Lauren Solomon
- Department of Pathology and Laboratory Medicine, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada
| | - Nami Shrestha Palikhe
- Division of Pulmonary Medicine, Department of Medicine and Alberta Respiratory Centre, University of Alberta, Edmonton, Alberta, Canada
| | - Harissios Vliagoftis
- Division of Pulmonary Medicine, Department of Medicine and Alberta Respiratory Centre, University of Alberta, Edmonton, Alberta, Canada
| | - Lisa Cameron
- Department of Pathology and Laboratory Medicine, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada
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Yang X, Geng J, Meng H. Glucocorticoid receptor modulates dendritic cell function in ulcerative colitis. Histol Histopathol 2020; 35:1379-1389. [PMID: 32706033 DOI: 10.14670/hh-18-241] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Ulcerative colitis (UC) is a serious form of inflammatory bowel disease (IBD) occurring worldwide. Although anti-TNF therapy is found to be effective in over 70% of patients with UC, nearly one-third are still deprived of effective treatment. Because glucocorticoids (GC) can effectively inhibit granulocyte-recruitment into the mucosa, cytokine secretion and T cell activation, they are used widely in the treatment of UC. However, remission is observed in only 55% of the patients after one year of steroid use due to a condition known as steroid response. Additionally, it has been noted that 20%-40% of the patients with UC do not respond to GC treatment. Researchers have revealed that the number of dendritic cells (DCs) in patients with UC tends to increase in the colonic mucosa. Many studies have determined that the removal of peripheral DCs through the adsorption and separation of granulocytes and monocytes could improve tolerance of the intestine to its symbiotic flora. Based on these results, further insights regarding the beneficial effects of Adacolumn apheresis in patients subjected to this treatment could be revealed. GC can effectively inhibit the activation of DCs by reducing the levels of major histocompatibility complex class II (MHC II) molecules, which is critical for controlling the recruitment of granulocytes. Therefore, alternative biological and new individualized therapies based on these approaches need to be evaluated to counter UC. In this review, progress in research associated with the regulatory effect of glucocorticoid receptors on DCs under conditions of UC is discussed, thus providing insights and identifying potential targets which could be employed in the treatment strategies against UC.
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Affiliation(s)
- Xinxin Yang
- Department of Pathology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Jingshu Geng
- Department of Pathology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Hongxue Meng
- Department of Pathology, Harbin Medical University Cancer Hospital, Harbin, China.,Department of Pathology, Harbin Medical University, Harbin, China.
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Ouchi R, Kawano T, Yoshida H, Ishii M, Miyasaka T, Ohkawara Y, Takayanagi M, Takahashi T, Ohno I. Maternal Separation as Early-Life Stress Causes Enhanced Allergic Airway Responses by Inhibiting Respiratory Tolerance in Mice. TOHOKU J EXP MED 2018; 246:155-165. [PMID: 30405003 DOI: 10.1620/tjem.246.155] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Epidemiologic studies indicate that exposure to psychosocial stress in early childhood is a risk factor of adult-onset asthma, but the mechanisms of this relationship are poorly understood. Therefore, we examined whether early-life stress increases susceptibility to adult-onset asthma by inhibiting the development of respiratory tolerance. Neonatal BALB/c female mice were aerosolized with ovalbumin (OVA) to induce immune tolerance prior to immune sensitization with an intraperitoneal injection of OVA and the adjuvant aluminum hydroxide. Maternal separation (MS) was applied as an early-life stressor during the induction phase of immune tolerance. The mice were challenged with OVA aerosol in adulthood, and allergic airway responses were evaluated, including airway hyper-responsiveness to inhaled methacholine, inflammatory cell infiltration, bronchoalveolar lavage fluid levels of interleukin (IL)-4, IL-5, and IL-13, and serum OVA-specific IgE. We then evaluated the effects of MS on the development of regulatory T (Treg) cells in bronchial lymph nodes (BLN) and on splenocyte proliferation and cytokine expression. In mice that underwent MS and OVA tolerization, the allergic airway responses and OVA-induced proliferation and IL-4 expression of splenocytes were significantly enhanced. Furthermore, exposure to MS was associated with a lower number of Treg cells in the BLN. These findings suggest that exposure to early-life stress prevents the acquisition of respiratory tolerance to inhaled antigen due to insufficient Treg cell development, resulting in Th2-biased sensitization and asthma onset. We provide the evidence for inhibitory effects of early-life stress on immune tolerance. The present findings may help to clarify the pathogenesis of adult-onset asthma.
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Affiliation(s)
- Ryusuke Ouchi
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Tasuku Kawano
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Hitomi Yoshida
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Masato Ishii
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Tomomitsu Miyasaka
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Yuichi Ohkawara
- Division of Experimental Allergy and Immunology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Motoaki Takayanagi
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Tomoko Takahashi
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Isao Ohno
- Center for Medical Education, Faculty of Medicine, Tohoku Medical and Pharmaceutical University
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Kawano T, Ouchi R, Ishigaki T, Masuda C, Miyasaka T, Ohkawara Y, Ohta N, Takayanagi M, Takahashi T, Ohno I. Increased Susceptibility to Allergic Asthma with the Impairment of Respiratory Tolerance Caused by Psychological Stress. Int Arch Allergy Immunol 2018; 177:1-15. [PMID: 29874662 DOI: 10.1159/000488289] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 03/09/2018] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Bronchial asthma is characterized by type 2 T helper (Th2) cell inflammation, essentially due to a breakdown of immune tolerance to harmless environmental allergens. Etiologically, experiences of psychological stress can be associated with a heightened prevalence of asthma. However, the mechanisms underlying stress-related asthma development are unclear. In this study, we examined whether psychological stress increases susceptibility to allergic asthma by downregulating immune tolerance. METHODS Female BALB/c mice were sensitized with ovalbumin/alum, followed by ovalbumin inhalation. Ovalbumin inhalation induced immune tolerance before sensitization occurred. Some mice were exposed to restraint stress during tolerance induction or sensitization. Asthma development was evaluated by airway responsiveness, inflammation, cytokine expression, and IgE synthesis. Sensitization was evaluated by measuring proliferation and cytokine production by splenocytes. The effects of stress exposure on the numbers and functions of dendritic cells and regulatory T (Treg) cells in bronchial lymph nodes and spleens were evaluated. To investigate the role of endogenous glucocorticoid in inhibiting immune tolerance after stress exposure, we examined the effects of (i) a glucocorticoid-receptor antagonist administered prior to stress exposure, and (ii) exogenous gluco-corticoid (instead of stress exposure). RESULTS Asthmatic responses and Th2-biased sensitization, which were suppressed in tolerized mice, re-emerged in tolerized mice stressed during tolerance induction in association with decreased tolerogenic dendritic and Treg cell numbers. The effects of stress exposure on tolerized mice were abolished by administering a glucocorticoid-receptor antagonist and reproduced by administering exogenous glucocorticoid without stress. CONCLUSIONS Our findings suggested that psychological stress can potentially increase allergic asthma susceptibility by inhibiting immune tolerance.
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Affiliation(s)
- Tasuku Kawano
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Ryusuke Ouchi
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Takahiro Ishigaki
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Chiaki Masuda
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Tomomitsu Miyasaka
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Yuichi Ohkawara
- Division of Experimental Allergy and Immunology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical Pharmaceutical University, Sendai, Japan
| | - Nobuo Ohta
- Division of Otorhinolaryngology, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Motoaki Takayanagi
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Tomoko Takahashi
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Isao Ohno
- Center for Medical Education, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
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Miyasaka T, Dobashi-Okuyama K, Takahashi T, Takayanagi M, Ohno I. The interplay between neuroendocrine activity and psychological stress-induced exacerbation of allergic asthma. Allergol Int 2018; 67:32-42. [PMID: 28539203 DOI: 10.1016/j.alit.2017.04.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 04/04/2017] [Accepted: 04/16/2017] [Indexed: 12/27/2022] Open
Abstract
Psychological stress is recognized as a key factor in the exacerbation of allergic asthma, whereby brain responses to stress act as immunomodulators for asthma. In particular, stress-induced enhanced type 2 T-helper (Th2)-type lung inflammation is strongly associated with asthma pathogenesis. Psychological stress leads to eosinophilic airway inflammation through activation of the hypothalamic-pituitary-adrenal pathway and autonomic nervous system. This is followed by the secretion of stress hormones into the blood, including glucocorticoids, epinephrine, and norepinephrine, which enhance Th2 and type 17 T-helper (Th17)-type asthma profiles in humans and rodents. Recent evidence has shown that a defect of the μ-opioid receptor in the brain along with a defect of the peripheral glucocorticoid receptor signaling completely disrupted stress-induced airway inflammation in mice. This suggests that the stress response facilitates events in the central nervous and endocrine systems, thus exacerbating asthma. In this review, we outline the recent findings on the interplay between stress and neuroendocrine activities followed by stress-induced enhanced Th2 and Th17 immune responses and attenuated regulatory T (Treg) cell responses that are closely linked with asthma exacerbation. We will place a special focus on our own data that has emphasized the continuity from central sensing of psychological stress to enhanced eosinophilic airway inflammation. The mechanism that modulates psychological stress-induced exacerbation of allergic asthma through neuroendocrine activities is thought to involve a series of consecutive pathological events from the brain to the lung, which implies there to be a "neuropsychiatry phenotype" in asthma.
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Affiliation(s)
- Tomomitsu Miyasaka
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Kaori Dobashi-Okuyama
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Tomoko Takahashi
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Motoaki Takayanagi
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Isao Ohno
- Center for Medical Education, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan.
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Neuropsychiatry phenotype in asthma: Psychological stress-induced alterations of the neuroendocrine-immune system in allergic airway inflammation. Allergol Int 2017; 66S:S2-S8. [PMID: 28669635 DOI: 10.1016/j.alit.2017.06.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 05/11/2017] [Accepted: 05/14/2017] [Indexed: 01/11/2023] Open
Abstract
Since the recognition of asthma as a syndrome with complex pathophysiological signs and symptoms, recent research has sought to classify asthma phenotypes based on its clinical and molecular pathological features. Psychological stress was first recognized as a potential immune system modulator of asthma at the end of the 19th century. The activation of the central nervous system (CNS) upon exposure to psychological stress is integral for the initiation of signal transduction processes. The stress hormones, including glucocorticoids, epinephrine, and norepinephrine, which are secreted following CNS activation, are involved in the immunological alterations involved in psychological stress-induced asthma exacerbation. The mechanisms underlying this process may involve a pathological series of events from the brain to the lungs, which is attracting attention as a conceptually advanced phenotype in asthma pathogenesis. This review presents insights into the critical role of psychological stress in the development and exacerbation of allergic asthma, with a special focus on our own data that emphasizes on the continuity from the central sensing of psychological stress to enhanced eosinophilic airway inflammation.
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Liu S, Verma M, Michalec L, Liu W, Sripada A, Rollins D, Good J, Ito Y, Chu H, Gorska MM, Martin RJ, Alam R. Steroid resistance of airway type 2 innate lymphoid cells from patients with severe asthma: The role of thymic stromal lymphopoietin. J Allergy Clin Immunol 2017; 141:257-268.e6. [PMID: 28433687 DOI: 10.1016/j.jaci.2017.03.032] [Citation(s) in RCA: 190] [Impact Index Per Article: 27.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 03/01/2017] [Accepted: 03/20/2017] [Indexed: 01/24/2023]
Abstract
BACKGROUND Type 2 innate lymphoid cells (ILC2s) represent an important type 2 immune cell. Glucocorticoid regulation of human ILC2s is largely unknown. OBJECTIVE We sought to assess steroid resistance of human blood and airway ILC2s from asthmatic patients and to examine its mechanism of induction. METHODS We studied human blood and lung ILC2s from asthmatic patients and control subjects using flow cytometry and ELISA. RESULTS Dexamethasone inhibited (P = .04) chemoattractant receptor-homologous molecule expressed on TH2 lymphocytes and type 2 cytokine expression by blood ILC2s stimulated with IL-25 and IL-33. However, it did not do so when ILC2s were stimulated with IL-7 and thymic stromal lymphopoietin (TSLP), 2 ligands of IL-7 receptor α. Unlike blood ILC2s, bronchoalveolar lavage (BAL) fluid ILC2s from asthmatic patients were resistant to dexamethasone. BAL fluid from asthmatic patients had increased TSLP but not IL-7 levels. BAL fluid TSLP levels correlated (r = 0.74) with steroid resistance of ILC2s. TSLP was synergistically induced in epithelial cells by IL-13 and human rhinovirus. Mechanistically, dexamethasone upregulated ILC2 expression of IL-7 receptor α, which augmented and sustained signal transducer and activator of transcription (STAT) 5 signaling by TSLP. TSLP induced mitogen-activated protein kinase kinase (MEK), c-Fos, inhibitor of DNA binding 3, phosphorylated signal transducer and activator of transcription (pSTAT) 3, and pSTAT5, molecules linked to steroid resistance. Dexamethasone inhibited c-Fos, inhibitor of DNA binding 3, and pSTAT3 but not pSTAT5 and MEK. The MEK inhibitor trametinib, the Janus kinase-STAT inhibitor tofacitinib, and the STAT5 inhibitor pimozide reversed steroid resistance of BAL ILC2s. CONCLUSIONS Dexamethasone inhibited type 2 cytokine production by blood ILC2s. IL-7 and TSLP abrogated this inhibition and induced steroid resistance of ILC2s in a MEK- and STAT5-dependent manner. BAL fluid ILC2s from asthmatic patients with increased TSLP levels were steroid resistant, which was reversed by clinically available inhibitors of MEK and STAT5.
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Affiliation(s)
- Sucai Liu
- Department of Medicine, Division of Allergy & Immunology, and the Division of Pulmonary and Critical Care Medicine, National Jewish Health, Denver, Colo
| | - Mukesh Verma
- Department of Medicine, Division of Allergy & Immunology, and the Division of Pulmonary and Critical Care Medicine, National Jewish Health, Denver, Colo
| | - Lidia Michalec
- Department of Medicine, Division of Allergy & Immunology, and the Division of Pulmonary and Critical Care Medicine, National Jewish Health, Denver, Colo; Department of Cytobiology and Proteomics, Medical University of Lodz, Lodz, Poland
| | - Weimin Liu
- Department of Medicine, Division of Allergy & Immunology, and the Division of Pulmonary and Critical Care Medicine, National Jewish Health, Denver, Colo
| | - Anand Sripada
- Department of Medicine, Division of Allergy & Immunology, and the Division of Pulmonary and Critical Care Medicine, National Jewish Health, Denver, Colo
| | - Donald Rollins
- Department of Medicine, Division of Allergy & Immunology, and the Division of Pulmonary and Critical Care Medicine, National Jewish Health, Denver, Colo; Department of Medicine, University of Colorado Denver, School of Medicine, Denver, Colo
| | - James Good
- Department of Medicine, Division of Allergy & Immunology, and the Division of Pulmonary and Critical Care Medicine, National Jewish Health, Denver, Colo; Department of Medicine, University of Colorado Denver, School of Medicine, Denver, Colo
| | - Yoko Ito
- Department of Medicine, Division of Allergy & Immunology, and the Division of Pulmonary and Critical Care Medicine, National Jewish Health, Denver, Colo
| | - HongWei Chu
- Department of Medicine, Division of Allergy & Immunology, and the Division of Pulmonary and Critical Care Medicine, National Jewish Health, Denver, Colo; Department of Medicine, University of Colorado Denver, School of Medicine, Denver, Colo
| | - Magdalena M Gorska
- Department of Medicine, Division of Allergy & Immunology, and the Division of Pulmonary and Critical Care Medicine, National Jewish Health, Denver, Colo; Department of Medicine, University of Colorado Denver, School of Medicine, Denver, Colo
| | - Richard J Martin
- Department of Medicine, Division of Allergy & Immunology, and the Division of Pulmonary and Critical Care Medicine, National Jewish Health, Denver, Colo; Department of Medicine, University of Colorado Denver, School of Medicine, Denver, Colo
| | - Rafeul Alam
- Department of Medicine, Division of Allergy & Immunology, and the Division of Pulmonary and Critical Care Medicine, National Jewish Health, Denver, Colo; Department of Medicine, University of Colorado Denver, School of Medicine, Denver, Colo.
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Okuyama K, Dobashi K, Miyasaka T, Yamazaki N, Kikuchi T, Sora I, Takayanagi M, Kita H, Ohno I. The involvement of glucocorticoids in psychological stress-induced exacerbations of experimental allergic asthma. Int Arch Allergy Immunol 2014; 163:297-306. [PMID: 24776388 DOI: 10.1159/000360577] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Accepted: 02/12/2014] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Psychological stress is associated with the aggravation of asthma symptoms. Glucocorticoids (GC), which are stress hormones released upon exposure to stress, have the potential to shift immune responses towards a predominant Th2 response by priming antigen-presenting cells to produce lower levels of IL-12 as well as reducing the development of regulatory T cells. However, the involvement of GC in psychological stress-induced exacerbations of allergic asthma has not yet been clarified. METHODS Sensitized mice were exposed to restraint stress followed by forced swimming stress, during which a GC receptor antagonist or a GC synthesis inhibitor was administered, and then antigen was inhaled. Corticosterone levels in the blood were measured in stressed and nonstressed mice. After antigen inhalation, the airway responses to aerosolized methacholine, epithelial mucus secretion and airway inflammation were evaluated, and the IL-13 contents in bronchoalveolar lavage fluid were measured. RESULTS The exposure to stress significantly increased corticosterone levels. Allergic airway responses and the increase of IL-13 contents evoked by antigen inhalation were significantly higher in stressed mice than in nonstressed mice. The administration of a GC receptor antagonist and a GC synthesis inhibitor during stress exposure significantly reduced the exacerbation of the airway responses and the increase of IL-13 contents in stressed mice challenged with antigen. CONCLUSIONS These results indicate that the increased release of GC upon exposure to stress has a priming effect on the aggravation of allergic airway responses following the exposure, suggesting a pathophysiological role for the neuroendocrine axis in linking psychological stress to asthma exacerbations.
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Affiliation(s)
- Kaori Okuyama
- Department of Pathophysiology, Tohoku Pharmaceutical University, Sendai, Japan
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Masid-de-Brito D, Xavier-Elsas P, Luz RA, Queto T, Almeida da Silva CLC, Lopes RS, Vieira BM, Gaspar-Elsas MIC. Essential roles of endogenous glucocorticoids and TNF/TNFR1 in promoting bone-marrow eosinopoiesis in ovalbumin-sensitized, airway-challenged mice. Life Sci 2013; 94:74-82. [PMID: 24239638 DOI: 10.1016/j.lfs.2013.11.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Revised: 10/16/2013] [Accepted: 11/01/2013] [Indexed: 02/08/2023]
Abstract
AIMS Stress mechanisms paradoxically contribute to allergic episodes in humans and mice. Glucocorticoids (GC) and interleukin (IL)-5 synergically upregulate murine bone-marrow eosinophil production. Here we explored the role of endogenous GC in allergen-stimulated bone-marrow eosinophil production in ovalbumin-sensitized/challenged mice. MAIN METHODS In BALB/c or C57BL/6 mice, sensitized and intranasally challenged with ovalbumin, we monitored eosinophil numbers in freshly harvested or cultured bone-marrow, and plasma corticosterone levels. Metyrapone (MET) was used to inhibit GC synthesis, and RU486 to block GC actions. In sensitized mice challenged intraperitoneally, we examined the relationship between eosinophilia of bone-marrow and peritoneal cavity, in the absence or presence of RU486. In experiments involving in vivo neutralization of tumor necrosis factor-α (TNF) by specific antibodies, or using mice which lack functional type I TNF receptors (TNFRI), we evaluated the relationship between TNF blockade, corticosterone levels, RU486 or MET treatment and challenge-induced bone-marrow eosinophilia. KEY FINDINGS RU486 or MET pretreatments abolished challenge-induced increases in eosinophil numbers in bone-marrow (in vivo and ex vivo), and in the peritoneal cavity. MET, but not RU486, prevented the challenge-induced increase in corticosterone levels. Challenge-induced bone-marrow eosinophilia and corticosterone surge were abolished in TNFRI-deficient mice. Anti-TNF-treatment very effectively prevented challenge-induced bone-marrow eosinophilia, in the absence of RU486 or MET, but had no independent effect in the presence of either drug. SIGNIFICANCE Endogenous GC was essential for allergen challenge-induced increases in eosinophil numbers inside bone-marrow. This effect required TNF and TNFRI, which suggests an immunoendocrine mechanism.
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Affiliation(s)
- Daniela Masid-de-Brito
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Brazil
| | - Pedro Xavier-Elsas
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Brazil.
| | - Ricardo Alves Luz
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Brazil; Depto Pediatria, Instituto Fernandes Figueira, FIOCRUZ, Rio de Janeiro, Brazil
| | - Túlio Queto
- Depto Pediatria, Instituto Fernandes Figueira, FIOCRUZ, Rio de Janeiro, Brazil
| | | | - Rodrigo Soares Lopes
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Brazil
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Abstract
Glucocorticoids have potent anti-inflammatory effects and have been used to treat patients with rheumatoid arthritis for more than 60 years. However, severe adverse effects of glucocorticoid treatment, including loss of bone mass and increased risk of fractures, are common. Data from studies of glucocorticoid-mediated gene regulation, which utilized conditional knockout mice in animal models of arthritis or glucocorticoid-induced osteoporosis, have substantially increased our understanding of the mechanisms by which glucocorticoids act via the glucocorticoid receptor. Following glucocorticoid binding, the receptor regulates gene expression either by interacting with DNA-bound transcription factors as a monomer or by binding directly to DNA as a dimer. In contrast to the old hypothesis that transrepression mechanisms involving monomeric glucocorticoid receptor actions were responsible for the anti-inflammatory effects of glucocorticoids, whereas dimeric glucocorticoid receptor binding resulted in adverse effects, data from animal models have shown that the anti-inflammatory and adverse effects of glucocorticoids are mediated by both monomeric and dimeric glucocorticoid receptor binding. This improved knowledge of the molecular mechanisms that underlie the beneficial and adverse effects of glucocorticoid therapy might lead to the development of rationales for novel glucocorticoid receptor ligands that could potentially have anti-inflammatory efficacy without adverse effects on bone.
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Shindoh C, Shishido R, Narumi N, Murai N, Miura M. Inhalation of budesonide/formoterol increases diaphragm muscle contractility. Allergol Int 2012; 61:439-49. [PMID: 22824973 DOI: 10.2332/allergolint.11-oa-0409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2011] [Accepted: 03/14/2012] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Although budesonide/formoterol (BUD/FORM) is used clinically as a steroid/β(2)-agonist single inhaler, it has not yet been clarified whether BUD/FORM has inotropic effects on diaphragm muscles after inhalation. METHODS We examined the effects of BUD/FORM inhalation, endotoxin injection, and BUD/FORM inhalation plus endotoxin injection on diaphragm contractile properties and nitric oxide (NO) production. After these three treatments, the diaphragm muscle was dissected, and its contractile properties were measured. Histochemistry for the reduced form of nicotinamide adenine dinucleotide phosphate diaphorase was performed for each muscle to assess NO production. RESULTS The force-frequency curves showed an upward shift 1 h after inhalation (p < 0.05) in the BUD/FORM inhalation only group. The force-frequency curves showed a downward shift 4 h after injection (p < 0.001) in the endotoxin injection groups. In the BUD/FORM inhalation plus endotoxin injection groups, a downward shift in the force-frequency curves at 4 h after endotoxin injection was prevented. NO production was inhibited in the BUD/FORM inhalation plus endotoxin injection group compared with that of the endotoxin injection only groups. CONCLUSIONS BUD/FORM inhalation has an inotropic effect on diaphragm muscle, protects diaphragm muscle deterioration after endotoxin injection, and inhibits NO production. Increments in muscle contractility with BUD/FORM inhalation are induced through a synergistic effect of an anti-inflammatory agent and β(2)-agonist.
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Affiliation(s)
- Chiyohiko Shindoh
- Department of Clinical Physiology, Health Sciences, Tohoku University Graduate School of Medicine, 2−1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, Japan.
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Roos AB, Barton JL, Miller-Larsson A, Dahlberg B, Berg T, Didon L, Nord M. Lung epithelial-C/EBPβ contributes to LPS-induced inflammation and its suppression by formoterol. Biochem Biophys Res Commun 2012; 423:134-9. [DOI: 10.1016/j.bbrc.2012.05.096] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Accepted: 05/17/2012] [Indexed: 11/29/2022]
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13
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Kerzerho J, Wunsch D, Szely N, Meyer HA, Lurz L, Röse L, Wahn U, Akbari O, Stock P. Effects of systemic versus local administration of corticosteroids on mucosal tolerance. THE JOURNAL OF IMMUNOLOGY 2011; 188:470-6. [PMID: 22105997 DOI: 10.4049/jimmunol.1101405] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Respiratory exposure to allergen induces T cell tolerance and protection against the development of airway hyperactivity in animal models of asthma. Whereas systemic administration of dexamethasone during the delivery of respiratory Ag has been suggested to prevent the development of mucosal tolerance, the effects of local administration of corticosteroids, first-line treatment for patients with bronchial asthma, on mucosal tolerance remain unknown. To analyze the effects of systemic versus local administration of different types of corticosteroids on the development of mucosal tolerance, mice were exposed to respiratory allergen to induce mucosal tolerance with or without systemic or intranasal application of different doses of dexamethasone or prednisolone. After the induction of mucosal tolerance, proliferation of T cells was inhibited in tolerized mice, whereas systemic applications of corticosteroids restored T cell proliferation and secretion of Th2 cytokines. In contrast, inhaled corticosteroids showed no effect on both T cell proliferation and cytokine secretion. In addition, mice systemically treated with corticosteroids showed an increased airway hyperactivity with a significant lung inflammation, but also an increased T effector cells/regulatory T cells ratio in the second lymphoid organs when compared with mice that receive corticosteroids by inhalation. These results demonstrate that local administration of corticosteroids has no effect on the development of immune tolerance in contrast to systemically applied corticosteroids. Furthermore, although different concentrations of corticosteroids are administered to patients, our results demonstrated that the route of administration rather than the doses affects the effect of corticosteroids on respiratory tolerance induction. Considering the broad application of corticosteroids in patients with allergic disease and asthma, the route of administration of steroid substances seems crucial in terms of treatment and potential side effects. These findings may help elucidate the apparently contradicting results of corticosteroid treatment in allergic diseases.
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Affiliation(s)
- Jerome Kerzerho
- Department of Molecular Microbiology and Immunology, University of Southern California, Los Angeles, CA 90033, USA
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14
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Srivastava K, Zhang T, Yang N, Sampson H, Li XM. Anti-Asthma Simplified Herbal Medicine Intervention-induced long-lasting tolerance to allergen exposure in an asthma model is interferon-γ, but not transforming growth factor-β dependent. Clin Exp Allergy 2011; 40:1678-88. [PMID: 20573156 DOI: 10.1111/j.1365-2222.2010.03545.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Chronic allergic asthma is the result of a T-helper type 2 (Th2)-biased immune status. Current asthma therapies control symptoms in some patients, but a long-lasting therapy has not been established. Anti-Asthma Simplified Herbal Medicine Intervention (ASHMI™), a Chinese herbal formula, improved symptoms and lung function, and reduced Th2 responses in a controlled trial of patients with persistent moderate to severe asthma. OBJECTIVE We evaluated the persistence of ASHMI™ beneficial effects following therapy in a murine model of chronic asthma and the immunological mechanisms underlying such effects. Methods BALB/c mice sensitized intraperitoneally with ovalbumin (OVA) received 3 weekly intratracheal OVA challenges to induce airway hyper-reactivity (AHR) and inflammation (OVA mice). Additionally, OVA mice were treated with ASHMI™ (OVA/ASHMI™) or water (OVA/sham) for 4 weeks, and then challenged immediately and 8 weeks post-therapy. In other experiments, OVA mice received ASHMI™ treatment with concomitant neutralization of IFN-γ or TGF-β. Effects on airway responses, cytokine- and OVA-specific IgE levels were determined 8 weeks post-therapy. RESULTS Before treatment, OVA mice exhibited AHR and pulmonary eosinophilic inflammation following OVA challenge, which was almost completely resolved immediately after completing treatment with ASHMI™ and did not re-occur following OVA re-challenge up to 8 weeks post-therapy. Decreased allergen-specific IgE and Th2 cytokine levels, and increased IFN-γ levels also persisted at least 8 weeks post-therapy. ASHMI™ effects were eliminated by the neutralization of IFN-γ, but not TGF-β, during therapy. CONCLUSION ASHMI™ induced long-lasting post-therapy tolerance to antigen-induced inflammation and AHR. IFN-γ is a critical factor in ASHMI™ effects.
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Affiliation(s)
- K Srivastava
- Department of Pediatrics, Division of Allergy & Immunology, The Mount Sinai School of Medicine, One Gustave L. Levy Place, New York, NY 10029-6574, USA
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15
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Baschant U, Tuckermann J. The role of the glucocorticoid receptor in inflammation and immunity. J Steroid Biochem Mol Biol 2010; 120:69-75. [PMID: 20346397 DOI: 10.1016/j.jsbmb.2010.03.058] [Citation(s) in RCA: 256] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2009] [Revised: 03/15/2010] [Accepted: 03/16/2010] [Indexed: 01/04/2023]
Abstract
Glucocorticoids are potent immunosuppressive agents with complex actions on immune cells evoking the following effects: inducing apoptosis, changing differentiation fate, inhibition of cytokine release, inhibition of migration and other features. Distinct molecular mechanisms of the glucocorticoid receptor (GR) contribute to different anti-inflammatory effects. Recently inflammatory models have been investigated using conditional knockout and function selective mice shedding light on critical cell types and molecular mechanisms of endogenous and therapeutic GC actions. Here we review the multiple effects of GCs on major immune cells, dendritic cells, myeloid cells and B- and T-lymphocytes and give a summary of studies using conditional GR knockout mice.
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Affiliation(s)
- Ulrike Baschant
- Leibniz Institute for Age Research - Fritz-Lipmann-Institute, Jena, Germany
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16
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Majak P, Rychlik B, Stelmach I. The effect of oral steroids with and without vitamin D3 on early efficacy of immunotherapy in asthmatic children. Clin Exp Allergy 2009; 39:1830-41. [PMID: 19817753 DOI: 10.1111/j.1365-2222.2009.03357.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND The possibility of additional strategies to enhance the effectiveness of specific immunotherapy (SIT) is highly attractive. AIM The aim of our study was to assess the influence of oral corticosteroids and oral corticosteroids combined with vitamin D(3) on the early clinical and immunological effects of SIT. METHODS It was a randomized, double-blind, placebo-controlled trial conducted in 54 asthmatic children allergic to house dust mites. Intervention was based on receiving a single dose of oral steroid, with or without vitamin D(3), or placebo only on the day of the build-up phase of SIT. RESULTS After 12 months of SIT, the median daily inhaled corticosteroid (ICS) dose, which controls the symptoms of asthma, was reduced by 25% in the steroid group. However, a 50% reduction of the median daily ICS dose was observed in the control group. The clinical effects of SIT were not affected in the steroid+D(3) group. Concomitantly, we found that intervention with prednisone significantly impaired the induction of T regulatory lymphocytes. Importantly, the clinical and immunological effects of SIT were not affected by intervention with steroids administered with vitamin D(3). CONCLUSIONS Our study failed to show a beneficial effect of oral corticosteroids on allergen-specific immunotherapy. We observed that the combined administration of a corticosteroid drug and allergen extract suppressed the early clinical and immunological effects of SIT and that vitamin D(3) prevented this 'adverse' influence of steroids.
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Affiliation(s)
- P Majak
- Department of Pediatrics and Allergy, Medical University of Lodz, Lodz, Poland
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17
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Gariboldi S, Palazzo M, Zanobbio L, Dusio GF, Mauro V, Solimene U, Cardani D, Mantovani M, Rumio C. Low dose oral administration of cytokines for treatment of allergic asthma. Pulm Pharmacol Ther 2009; 22:497-510. [PMID: 19464382 DOI: 10.1016/j.pupt.2009.05.002] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2009] [Accepted: 05/05/2009] [Indexed: 01/08/2023]
Abstract
Many inflammatory diseases are characterized by an imbalance among lymphocyte populations, in particular Th1, Th2 and the recently described Th17 cells. The Th1/Th2 imbalance is linked to many factors, but certainly the role of cytokines is essential. In Th2 diseases IL-4 expression is predominant, while Th1 pathologies are characterized by high expression of IFN-gamma and IL-12. Though today the therapeutical proposal for many inflammatory diseases aims to re-establish normal levels of Th1/Th2 cytokines, the pharmacological use of cytokines, which are very active molecules, is limited by the possible collateral effects. Therefore, our study aims to determine, in a murine model of allergic asthma, the possible therapeutic activity of low dose cytokines solutions, mechanically activated. We found that oral administration of low doses IL-12 plus IFN-gamma is able to solve the bronchial hyperresponsiveness condition of mice, establishing normal cytokine levels. The anti-asthma activity was confirmed by histological analysis of lungs and broncho-alveolar lavage fluid cell count. Serum ovalbumin-specific IgE was also significantly inhibited by treatment with low dose activated cytokines solution. These findings may suggest a novel approach to diseases which involve a Th1/Th2 imbalance.
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Affiliation(s)
- Silvia Gariboldi
- iMIL - italian Mucosal Immunity Laboratory, Department of Human Morphology and Biomedical Sciences Città Studi, Università degli Studi di Milano, via Mangiagalli 31, 20133 Milano, Italy
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18
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Southam DS, Ellis R, Wattie J, Glass W, Inman MD. Goblet cell rebound and airway dysfunction with corticosteroid withdrawal in a mouse model of asthma. Am J Respir Crit Care Med 2008; 178:1115-22. [PMID: 18849499 DOI: 10.1164/rccm.200801-084oc] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
RATIONALE Although corticosteroids are highly effective at preventing allergen-induced increases in goblet cell numbers, we observed in unpublished experiments a rebound increase in goblet cell numbers in mice after the simultaneous withdrawal of corticosteroid and cessation of exposure to allergen that reached levels greater than those observed in mice exposed to allergen alone, without corticosteroid treatment. OBJECTIVES To formally explore the goblet cell hyperplasia rebound observed after corticosteroid withdrawal in allergen-exposed mice to determine the mechanism responsible for this previously undescribed pathology. METHODS Mice airways were assessed for mucin-containing goblet cells after exposure to varying durations of allergen and corticosteroid. MEASUREMENTS AND MAIN RESULTS We confirmed that the simultaneous withdrawal of corticosteroid and cessation of exposure to allergen resulted in a goblet cell hyperplasia rebound that reached levels greater than those observed in allergen-exposed corticosteroid naive mice. Importantly, the goblet cell rebound was associated with a significant airway dysfunction greater than that observed in allergen-exposed corticosteroid naive mice. The goblet cell hyperplasia rebound is independent of the type of corticosteroid or allergen and was associated with an increased level of bronchoalveolar lavage IL-13. Inhibition of IL-13, but not CD4+ T cells, completely inhibited the goblet cell hyperplasia rebound and, critically, the associated airway dysfunction. CONCLUSIONS These findings suggest that certain corticosteroid treatment regimes may actually potentiate airway remodeling and dysfunction in patients with asthma and lead to increased exacerbations and worsening of asthma symptoms.
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Affiliation(s)
- David S Southam
- Firestone Institute for Respiratory Health, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
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19
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Johnson JR, Pacitto SR, Wong J, Archer EW, Eirefelt S, Miller-Larsson A, Jordana M. Combined budesonide/formoterol therapy in conjunction with allergen avoidance ameliorates house dust mite-induced airway remodeling and dysfunction. Am J Physiol Lung Cell Mol Physiol 2008; 295:L780-8. [PMID: 18776055 DOI: 10.1152/ajplung.90229.2008] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Allergic asthma is characterized by airway inflammation in response to chronic allergen exposure, resulting in remodeling of the airway wall accompanied by dysfunctional airway physiology. However, a link between the immune-inflammatory response to allergen and changes to airway structure and physiology has not yet been fully elucidated. Moreover, the impact of inhaled corticosteroids and beta(2)-agonists, the primary pharmacotherapy for asthma, on this process has not been completely evaluated. In this study, we employed a murine model of chronic exposure to a common environmental aeroallergen, house dust mite, to recapitulate the phenotype of clinical asthma. By examining the therapeutic effects of corticosteroid/beta(2)-agonist combination therapy with budesonide/formoterol (BUD/FORM) in this model of airway disease, we endeavored to determine the impact of BUD/FORM on lung inflammation, structure, and physiology. BUD/FORM was delivered either while allergen exposure was ongoing (concurrent therapy) or following the cessation of allergen exposure (postexposure therapy). Our results show that airway inflammation was substantially reduced in BUD/FORM-treated mice in the concurrent therapy group, whereas in the postexposure therapy group airway inflammation spontaneously resolved. In contrast, BUD/FORM was most effective in resolving several aspects of airway remodeling and bronchial hyperreactivity when delivered in conjunction with allergen withdrawal. This study demonstrates that although both BUD/FORM therapy and allergen avoidance independently reduce airway inflammation, only BUD/FORM therapy in conjunction with allergen avoidance can effectively reverse airway remodeling and bronchial hyperreactivity induced by chronic allergen exposure.
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Affiliation(s)
- Jill R Johnson
- Department of Pathology and Molecular Medicine, Michael G. DeGroote Centre for Learning and Discovery, McMaster University, 1200 Main St. West, Hamilton, Ontario, Canada
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20
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Cyr MM, Baatjes AJ, Dorman SC, Crawford L, Sehmi R, Foley R, Alam R, Byrne PO, Denburg JA. In vitro effects of budesonide on eosinophil-basophil lineage commitment. Open Respir Med J 2008; 2:60-6. [PMID: 19343093 PMCID: PMC2606647 DOI: 10.2174/1874306400802010060] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2008] [Revised: 04/16/2008] [Accepted: 05/27/2008] [Indexed: 02/08/2023] Open
Abstract
UNLABELLED IL-5 is the primary cytokine that stimulates the production and survival of eosinophils and basophils from progenitor cells. The inhaled glucocorticoid, budesonide, has been shown to exert a therapeutic effect via suppression of eosinophil/basophil progenitors in vivo. Since various steroids have exhibited the ability to enhance eosinophil/basophil progenitor differentiation, we examined the effects of budesonide in vitro. Bone marrow and cord blood samples were obtained and cultured in the presence of IL-5 alone or IL-5 plus budesonide. Eosinophil/basophil colony-forming units were enumerated from cultured nonadherent mononuclear cells and from purified CD34⁺ cells. CD34⁺ cells with and without budesonide were also examined for up-regulation of ERK1/2, MAPK and GATA-1 using real time-PCR. RESULTS i) up-regulation of eosinophil/basophil colony-forming units is due to the direct effects of budesonide on IL-5-stimulated progenitors; ii) GATA-1 is likely involved in the early amplification of eosinophil/basophil progenitor commitment leading to increased differentiation. A potential transcriptional pathway has been identified which may mediate the effects of budesonide on eosinophil/basophil lineage commitment.
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Affiliation(s)
- Michael M Cyr
- Division of Clinical Immunology and Allergy, McMaster University, Hamilton, ON, Canada
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21
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Nagamachi M, Sakata D, Kabashima K, Furuyashiki T, Murata T, Segi-Nishida E, Soontrapa K, Matsuoka T, Miyachi Y, Narumiya S. Facilitation of Th1-mediated immune response by prostaglandin E receptor EP1. ACTA ACUST UNITED AC 2007; 204:2865-74. [PMID: 17967902 PMCID: PMC2118516 DOI: 10.1084/jem.20070773] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
Prostaglandin E2 (PGE2) exerts its actions via four subtypes of the PGE receptor, EP1–4. We show that mice deficient in EP1 exhibited significantly attenuated Th1 response in contact hypersensitivity induced by dinitrofluorobenzene (DNFB). This phenotype was recapitulated in wild-type mice by administration of an EP1-selective antagonist during the sensitization phase, and by adoptive transfer of T cells from sensitized EP1−/− mice. Conversely, an EP1-selective agonist facilitated Th1 differentiation of naive T cells in vitro. Finally, CD11c+ cells containing the inducible form of PGE synthase increased in number in the draining lymph nodes after DNFB application. These results suggest that PGE2 produced by dendritic cells in the lymph nodes acts on EP1 in naive T cells to promote Th1 differentiation.
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Affiliation(s)
- Miyako Nagamachi
- Department of Pharmacology, Faculty of Medicine, Kyoto University, Kyoto 606-8501, Japan
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22
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Hrvacić B, Bosnjak B, Tudja M, Mesić M, Merćep M. Applicability of an ultrasonic nebulization system for the airways delivery of beclomethasone dipropionate in a murine model of asthma. Pharm Res 2007; 23:1765-75. [PMID: 16832613 DOI: 10.1007/s11095-006-9029-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2005] [Accepted: 04/07/2006] [Indexed: 10/24/2022]
Abstract
PURPOSE We have assessed the use of an ultrasonic nebulization system (UNS), composed of ultrasonic nebulizer and diffusion dryer filled with charcoal, for the effective delivery of beclomethasone to the airways in a murine asthma model. METHODS Solution of beclomethasone in ethanol was aerosolized using an ultrasonic nebulizer. Passage of the aerosol through a drying column containing charcoal and deionizer produced dry beclomethasone particles. Particles were delivered to BALB/c mice placed in a whole-body exposition chamber 1 h before intranasal challenge with ovalbumine. Efficacy of beclomethasone delivery was evaluated by examining bronchoalveolar lavage fluid (BALF) cytology. RESULTS Effect of three UNS system parameters on aerosol particle size was investigated. The critical parameter affecting the size of dry particles was beclomethasone concentration in aerosolized solution and solution flow rate while power level of ultrasonic nebulizer generator had no effect. Administration of beclomethasone at calculated dose of 150 microg/kg to mice significantly decreased total cell number and relative eosinophil number in BALF. CONCLUSIONS The UNS system produces a monodisperse aerosol that can be used for inhalative delivery of poorly water soluble substances to experimental animals. The UNS system minimizes formulation requirements and allows rapid and relatively simple efficacy and toxicity testing in animals.
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Affiliation(s)
- Boska Hrvacić
- PLIVA Research Institute Ltd., Prilaz baruna Filipovića 29, HR-10000, Zagreb, Croatia.
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23
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Laan TTJM, Bull S, Pirie RS, Fink-Gremmels J. The anti-inflammatory effects of IV administered clenbuterol in horses with recurrent airway obstruction. Vet J 2006; 171:429-37. [PMID: 16624708 DOI: 10.1016/j.tvjl.2005.02.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/10/2005] [Indexed: 11/29/2022]
Abstract
Cyclic AMP elevating agents have been shown to exhibit anti-inflammatory properties in addition to functions such as bronchodilation. The aim of this study was to investigate this dual action of clenbuterol (CB; Ventipulmin) on horses affected with recurrent airway obstruction (RAO). Seven RAO susceptible horses received inhalation challenges with aerosolised lipopolysaccharide (LPS), hay dust suspension (HDS) and Aspergillus fumigatus antigen (AF) with and without prior treatment with intravenous CB. Data showed that CB exerted significant beneficial effects on lung function, total cell count (TCC) and bronchoalveolar lavage neutrophil influx. In addition, CB significantly decreased the expression of several pro-inflammatory cytokines and chemokines in the alveolar macrophages of RAO-susceptible horses after challenge with LPS and HDS, and increased the expression of interleukin-6, known to act as a pro-and anti-inflammatory cytokine, following different challenges. This anti-inflammatory activity of CB is of additive value to its currently recognised use in equine RAO.
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Affiliation(s)
- Tamarinde T J M Laan
- Department of Equine Science, Faculty of Veterinary Medicine, Utrecht University, P.O. Box 80152, 3508 TD Utrecht, The Netherlands.
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24
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Morand EF, Leech M, Bernhagen J. MIF: a new cytokine link between rheumatoid arthritis and atherosclerosis. Nat Rev Drug Discov 2006; 5:399-410. [PMID: 16628200 DOI: 10.1038/nrd2029] [Citation(s) in RCA: 276] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Macrophage migration inhibitory factor (MIF) is well established as a key cytokine in immuno-inflammatory diseases such as rheumatoid arthritis. Inflammation is now also recognized as having a crucial role in atherosclerosis, and recent evidence indicates that MIF could also be important in this disease. Here, we review the role of MIF in rheumatoid arthritis and atherosclerosis, discuss the ways in which MIF and its relationship with glucocorticoids could link these diseases, and consider the potential of MIF as a new therapeutic target for small-molecule and antibody-based anti-cytokine drugs.
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Affiliation(s)
- Eric F Morand
- Centre for Inflammatory Diseases, Monash Institute for Medical Research, 246 Clayton Road, Clayton, Victoria 3168, Australia.
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Stock P, Akbari O, DeKruyff RH, Umetsu DT. Respiratory tolerance is inhibited by the administration of corticosteroids. THE JOURNAL OF IMMUNOLOGY 2006; 175:7380-7. [PMID: 16301645 DOI: 10.4049/jimmunol.175.11.7380] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Corticosteroids constitute the most effective current anti-inflammatory therapy for acute and chronic forms of allergic diseases and asthma. Corticosteroids are highly effective in inhibiting the effector function of Th2 cells, eosinophils, and epithelial cells. However, treatment with corticosteroids may also limit beneficial T cell responses, including respiratory tolerance and the development of regulatory T cells (T(Reg)), which actively suppress inflammation in allergic diseases. To examine this possibility, we investigated the effects of corticosteroid administration on the development of respiratory tolerance. Respiratory exposure to Ag-induced T cell tolerance and prevented the subsequent development of allergen-induced airway hyperreactivity. However, treatment with dexamethasone during the delivery of respiratory Ag prevented tolerance, such that allergen sensitization and severe airway hyperreactivity subsequently occurred. Treatment with dexamethasone during respiratory exposure to allergen eliminated the development of IL-10-secreting dendritic cells, which was required for the induction of IL-10-producing allergen-specific T(Reg) cells. Therefore, because allergen-specific T(Reg) cells normally develop to prevent allergic disease and asthma, our results suggest that treatment with corticosteroids, which limit the development of T(Reg) cells and tolerance to allergens, could enhance subsequent Th2 responses and aggravate the long-term course of allergic diseases and asthma.
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Affiliation(s)
- Philippe Stock
- Division of Immunology, Children's Hospital Boston, Harvard Medical School, Boston, MA 02115, USA
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26
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Epstein MM. Targeting memory Th2 cells for the treatment of allergic asthma. Pharmacol Ther 2005; 109:107-36. [PMID: 16081161 DOI: 10.1016/j.pharmthera.2005.06.006] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2005] [Accepted: 06/21/2005] [Indexed: 12/19/2022]
Abstract
Th2 memory cells play an important role in the pathogenesis of allergic asthma. Evidence from patients and experimental models indicates that memory Th2 cells reside in the lungs during disease remission and, upon allergen exposure, become activated effectors involved in disease exacerbation. The inhibition of memory Th2 cells or their effector functions in allergic asthma influence disease progression, suggesting their importance as therapeutic targets. They are allergen specific and can potentially be suppressed or eliminated using this specificity. They have distinct activation, differentiation, cell surface phenotype, migration capacity, and effector functions that can be targeted singularly or in combination. Furthermore, memory Th2 cells residing in the lungs can be treated locally. Capitalizing on these unique attributes is important for drug development for allergic asthma. The aim of this review is to present an overview of therapeutic strategies targeting Th2 memory cells in allergic asthma, emphasizing Th2 generation, differentiation, activation, migration, effector function, and survival.
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Affiliation(s)
- Michelle M Epstein
- Medical University of Vienna, Department of Dermatology, Lazarettgasse 19, Vienna A-1090, Austria.
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27
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Current World Literature. Curr Opin Allergy Clin Immunol 2005. [DOI: 10.1097/01.all.0000175939.68435.7e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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28
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Guo TL, Auttachoat W, Chi RP. Genistein enhancement of respiratory allergen trimellitic anhydride-induced IgE production by adult B6C3F1 mice following in utero and postnatal exposure. Toxicol Sci 2005; 87:399-408. [PMID: 16049267 PMCID: PMC1351224 DOI: 10.1093/toxsci/kfi268] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The objective of the present study was to determine if exposure to the phytoestrogen genistein (GEN) during immune development had any effects on the production of IgE by adult mice following dermal treatment with trimellitic anhydride (TMA), a respiratory allergen. B6C3F1 mice were exposed to GEN either by feeding at 500 ppm or by gavage (20 mg/kg) for varied periods from gestation day (GD) 14 to postnatal day (PND) 84. In utero exposure to GEN by feeding increased the production of IgE at PND 84 in male mice but not in female mice. In male mice, continuous exposure to GEN postnatally diminished the in utero exposure-induced enhancement in serum total IgE production. However, continuous exposure to GEN from GD 14 to PND 84 was required to increase serum total IgE production in female mice. In utero exposure to GEN by gavage increased the production of IgE at PND 84 in female mice but not in male mice when the mice were maintained on the NIH-07 rodent diet in which a medium level of phytoestrogens was present. The enhancement in IgE production after GEN exposure in females but not in males was associated with decreases in the percentages of CD4(+)CD25(+) T suppressor cells, and increases in the natural killer (NK) cell activity, the basal splenocyte proliferation, the expression of CD86 by B cells, and the production of IL-2 and IL-4. Overall, the results demonstrated that GEN differentially modulated the developing immune system in male and female mice, and that more IgE was produced upon exposure to TMA in the adult.
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Affiliation(s)
- Tai L Guo
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, 23298-0613, USA.
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29
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Current World Literature. Curr Opin Allergy Clin Immunol 2005. [DOI: 10.1097/01.all.0000162314.10050.34] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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