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AbuJabal R, Ramakrishnan RK, Bajbouj K, Hamid Q. Role of IL-5 in asthma and airway remodelling. Clin Exp Allergy 2024; 54:538-549. [PMID: 38938056 DOI: 10.1111/cea.14489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 04/10/2024] [Accepted: 04/15/2024] [Indexed: 06/29/2024]
Abstract
Asthma is a common and burdensome chronic inflammatory airway disease that affects both children and adults. One of the main concerns with asthma is the manifestation of irreversible tissue remodelling of the airways due to the chronic inflammatory environment that eventually disrupts the whole structure of the airways. Most people with troublesome asthma are treated with inhaled corticosteroids. However, the development of steroid resistance is a commonly encountered issue, necessitating other treatment options for these patients. Biological therapies are a promising therapeutic approach for people with steroid-resistant asthma. Interleukin 5 is recently gaining a lot of attention as a biological target relevant to the tissue remodelling process. Since IL-5-neutralizing monoclonal antibodies (mepolizumab, reslizumab and benralizumab) are currently available for clinical use, this review aims to revisit the role of IL-5 in asthma pathogenesis at large and airway remodelling in particular, in addition to exploring its role as a target for biological treatments.
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Affiliation(s)
- Rola AbuJabal
- Research Institute of Medical and Health Sciences, University of Sharjah, Sharjah, United Arab Emirates
| | - Rakhee K Ramakrishnan
- Research Institute of Medical and Health Sciences, University of Sharjah, Sharjah, United Arab Emirates
| | - Khuloud Bajbouj
- Research Institute of Medical and Health Sciences, University of Sharjah, Sharjah, United Arab Emirates
- College of Medicine, University of Sharjah, Sharjah, United Arab Emirates
- Department of Biomedical Sciences, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Qutayba Hamid
- Research Institute of Medical and Health Sciences, University of Sharjah, Sharjah, United Arab Emirates
- College of Medicine, University of Sharjah, Sharjah, United Arab Emirates
- Meakins-Christie Laboratories, McGill University, Montreal, Québec, Canada
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Papaporfyriou A, Bartziokas K, Papachatzopoulou E, Grapatsas K, Kallieri M, Spathis A, Steiropoulos P, Bakakos P, Papiris S, Loukides S, Papaioannou AI. Effects of menopause and fat mass in asthmatic inflammation. J Asthma 2024:1-9. [PMID: 38900498 DOI: 10.1080/02770903.2024.2362859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 05/29/2024] [Indexed: 06/21/2024]
Abstract
INTRODUCTION Female hormones and obesity have an impact on women with asthma. We aimed to describe how these components affect asthma inflammatory processes. METHODS Sex hormones [FSH, LH, estradiol (E2), estrone (E1), testosterone and Δ4 androstenedione (A4)] and serum IL1β, IL13, IL17a, IL-5, IL6, TNF-a were measured from 11 to18 pre- and postmenopausal women with asthma. RESULTS Premenopausal normal weight women revealed higher levels of IL5 and IL17a than obese women on both days of the menstrual cycle (IL5: D1: 6.4 vs 1.4 pg/ml, p = .036 and D14: 3 vs 1.4 pg/ml, p = .045 and IL17a: D1: 13.7 pg/ml vs 10.6 pg/ml and D14: 12.4 pg/ml vs 10.6 pg/ml, p = .009, respectively). In premenopausal women on D1, Δ4 Androstenedione was positively correlated with IL1β (p = .016, r = 0.733), whereas on D14, Estradiol with IL1β (p = .009, r = -.768) and TNF-a with Testosterone (p = .004, r = -0.816), and Δ4 Androstenedione (p = .002, r = -0.841) negatively. In postmenopausal women, TNF-a was negatively associated with FSH (p = .004, r = -0.638), but positively with Testosterone (p = .025, r = 0.526) and IL10 also positively with Estradiol (p = .007, r = 0.610). CONCLUSION Obesity shows a protective role in asthma through the suppression of IL5 and IL17. Estrogens seem to inhibit Th1 and Th2 inflammation, while androgens have a dual role with negative and positive correlations with neutrophilic biomarkers.
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Affiliation(s)
- Anastasia Papaporfyriou
- Division of Pulmonology, Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | | | - Eftychia Papachatzopoulou
- 1st Department of Obstetrics and Gynecology, National and Kapodistrian University of Athens, Alexandra Hospital, Athens, Greece
| | - Kostas Grapatsas
- Department of Thoracic Surgery and Thoracic Endoscopy, Ruhrlandklinik, West German Lung Center, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Maria Kallieri
- 2nd Respiratory Medicine Department, Attikon University Hospital, Athens, Greece
| | - Aris Spathis
- Department of Pathology, Attikon University Hospital, Athens Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Paschalis Steiropoulos
- Department of Respiratory Medicine, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
| | - Petros Bakakos
- 1st University Department of Respiratory Medicine, Sotiria Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Spyros Papiris
- 2nd Respiratory Medicine Department, Attikon University Hospital, Athens, Greece
| | - Stelios Loukides
- 2nd Respiratory Medicine Department, Attikon University Hospital, Athens, Greece
| | - Andriana I Papaioannou
- 1st University Department of Respiratory Medicine, Sotiria Hospital, National and Kapodistrian University of Athens, Athens, Greece
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Mao Z, Qian Y, Liu Z, Shi Y, Fan L, Zhang Q. LINC00158 modulates the function of BEAS-2B cells via targeting BCL11B and ameliorates OVA-LPS-induced severe asthma in mice models. Int Immunopharmacol 2024; 130:111739. [PMID: 38442574 DOI: 10.1016/j.intimp.2024.111739] [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: 12/04/2023] [Revised: 02/18/2024] [Accepted: 02/19/2024] [Indexed: 03/07/2024]
Abstract
Persistent type (T) 2 airway inflammation plays an important role in the development of severe asthma. However, the molecular mechanisms leading to T2 severe asthma have yet to be fully clarified. Human normal lung epithelial cells (BEAS-2B cells) were transfected with LINC00158/BCL11B plasmid/small interfering RNA (siRNA). Levels of epithelial-mesenchymal transition (EMT)-related markers were measured using real-time qPCR (RT-qPCR) and western blot. A dual luciferase reporter assay was used to validate the targeting relationship between LINC00158 and BCL11B. The effects of LINC00158-lentivirus vector-mediated overexpression and dexamethasone on ovalbumin (OVA)/lipopolysaccharide (LPS)-induced severe asthma were investigated in mice in vivo. Our study showed that overexpression of LINC00158/BCL11B inhibited the levels of EMT-related proteins, apoptosis, and promoted the proliferation of BEAS-2B cells. BCL11B was a direct target of LINC00158. And LINC00158 targeted BCL11B to regulate EMT, apoptosis, and cell proliferation of BEAS-2B cells. Compared with severe asthma mice, LINC00158 overexpression alleviated OVA/LPS-induced airway hyperresponsiveness and airway inflammation, including reductions in T helper 2 cells factors in lung tissue and BALF, serum total- and OVA-specific IgE, inflammatory cell infiltration, and goblet cells hyperplasia. In addition, LINC00158 overexpression alleviated airway remodeling, including reduced plasma TGF-β1 and collagen fiber deposition, as well as suppression of EMT. Additionally, overexpression of LINC00158 enhanced the therapeutic effect of dexamethasone in severe asthmatic mice models. LINC00158 regulates BEAS-2B cell biological function by targeting BCL11B. LINC00158 ameliorates T2 severe asthma in vivo and provides new insights into the clinical treatment of severe asthma.
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Affiliation(s)
- Zhengdao Mao
- Department of Respiratory and Critical Care Medicine, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, China
| | - Yan Qian
- Department of Respiratory and Critical Care Medicine, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, China
| | - Zhiguang Liu
- Department of Respiratory and Critical Care Medicine, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, China
| | - Yujia Shi
- Department of Respiratory and Critical Care Medicine, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, China
| | - Liang Fan
- Department of Respiratory and Critical Care Medicine, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, China
| | - Qian Zhang
- Department of Respiratory and Critical Care Medicine, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, China; Changzhou Medical Center, Nanjing Medical University, Changzhou 213003, China.
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Xu J, Yu Z, Li W. Kaempferol inhibits airway inflammation induced by allergic asthma through NOX4-Mediated autophagy. Hum Exp Toxicol 2023; 42:9603271231154227. [PMID: 36803065 DOI: 10.1177/09603271231154227] [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: 02/23/2023]
Abstract
BACKGROUND Kaempferol has important medicinal value in the treatment of asthma. However, its mechanism of action has not been fully understood and needs to be explored and studied. METHODS A binding activity of kaempferol with nicotinamide adenine dinucleotide phosphate oxidase 4 (NOX4) was analyzed by molecular docking. Human bronchial epithelial cells (BEAS-2B) were treated with different concentrations (0, 1, 5, 10, 20, 40 μg/mL) of kaempferol to select its suitable concentration. In the transforming growth factor (TGF)-β1-induced BEAS-2B, cells were treated with 20 μg/mL kaempferol or 20 μM GLX35132 (a NOX4 inhibitor) to analyze its effects on NOX4-mediated autophagy. In the ovalbumin (OVA)-induced mice, 20 mg/kg kaempferol or 3.8 mg/kg GLX351322 administration was performed to analyze the therapeutic effects of kaempferol on NOX4-mediated autophagy. An autophagy activator, rapamycin, was used to confirm the mechanism of kaempferol in treatment of allergic asthma. RESULTS A good binding of kaempferol to NOX4 (score = -9.2 kcal/mol) was found. In the TGF-β1-induced BEAS-2B, the NOX4 expression was decreased with kaempferol dose increase. The secretions of IL-25 and IL-33, and the NOX4-mediated autophagy were significantly decreased by kaempferol treatment in the TGF-β1-induced BEAS-2B. In the OVA-challenged mice, kaempferol treatment improved airway inflammation and remodeling through suppressing NOX4-mediated autophagy. The rapamycin treatment clearly hampered the therapeutic effects of kaempferol in the TGF-β1-induced cells and OVA-induced mice. CONCLUSIONS This study identifies kaempferol binds NOX4 to perform its functions in the treatment of allergic asthma, providing an effective therapeutic strategy in the further treatment of asthma.
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Affiliation(s)
- Jianfeng Xu
- Department of Pulmonary and Critical Care Medicine, 117747Yantai Yuhuangding Hospital, Yantai, China
| | - Zhenyu Yu
- Department of Anesthesiology, 117747Yantai Yuhuangding Hospital, Yantai, China
| | - Wei Li
- Department of Pulmonary and Critical Care Medicine, 117747Yantai Yuhuangding Hospital, Yantai, China
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Funke L, Gnipp S, Ahrens M, Eisenacher M, Peters M, Sitek B, Bracht T. Quantitative analysis of proteome dynamics in a mouse model of asthma. Clin Exp Allergy 2021; 51:1471-1481. [PMID: 33550702 DOI: 10.1111/cea.13843] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 01/14/2021] [Accepted: 01/21/2021] [Indexed: 12/01/2022]
Abstract
BACKGROUND Asthma is an inflammatory disease of the respiratory system, and a major factor of increasing health care costs worldwide. The molecular actors leading to the development of chronic asthma are not fully understood and require further investigation. OBJECTIVE The aim of this study was to monitor the proteome dynamics during asthma development from early inflammatory to late fibrotic stages. METHODS A mouse asthma model was used to analyse the lung proteome at four time points during asthma development (0 weeks = control, 5, 8 and 12 weeks of treatment, n = 6 each). The model was analysed using lung function tests, immune cell counting and histology. Furthermore, a multi-fraction mass spectrometry-based proteome analysis was performed to achieve a comprehensive coverage and quantification of the lung proteome. RESULTS At early stages, the mice showed predominant eosinophilic inflammation of the airways, which disappeared at later stages and was replaced by marked airway hyper-reactivity and fibrosis of the airways. 3325 proteins were quantified with 435 proteins found to be significantly differentially abundant between the experimental groups (ANOVA p-value ≤.05, maximum fold change ≥1.5). We applied hierarchical clustering to identify common protein abundance profiles along the asthma development and analysed these clusters using gene ontology annotation and enrichment analysis. We demonstrate the correlation of protein clusters with the course of asthma development, that is eosinophilic inflammation and fibrotic remodelling of the airways. CONCLUSIONS AND CLINICAL RELEVANCE Proteome analysis revealed proteins that were previously described to be important during asthma chronification. Moreover, we identified additional proteins previously not described in the context of asthma. We provide a comprehensive data set of a long-term mouse model of asthma that may contribute to a better understanding and allow new insights into the progression and development of chronic asthma. Data are available via ProteomeXchange with identifier PXD011159.
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Affiliation(s)
- Lukas Funke
- Medizinisches Proteom-Center, Medical Faculty, Ruhr-University Bochum, Bochum, Germany
| | - Stefanie Gnipp
- Experimentelle Pneumologie, Ruhr-University Bochum, Bochum, Germany
| | - Maike Ahrens
- Medizinisches Proteom-Center, Medical Faculty, Ruhr-University Bochum, Bochum, Germany
| | - Martin Eisenacher
- Medizinisches Proteom-Center, Medical Faculty, Ruhr-University Bochum, Bochum, Germany.,Center for Protein Diagnostics (ProDi), Medical Proteome Analysis, Ruhr-University Bochum, Bochum, Germany
| | - Marcus Peters
- Experimentelle Pneumologie, Ruhr-University Bochum, Bochum, Germany.,Molekulare Immunologie, Ruhr-University Bochum, Bochum, Germany
| | - Barbara Sitek
- Medizinisches Proteom-Center, Medical Faculty, Ruhr-University Bochum, Bochum, Germany.,Center for Protein Diagnostics (ProDi), Medical Proteome Analysis, Ruhr-University Bochum, Bochum, Germany
| | - Thilo Bracht
- Medizinisches Proteom-Center, Medical Faculty, Ruhr-University Bochum, Bochum, Germany.,Center for Protein Diagnostics (ProDi), Medical Proteome Analysis, Ruhr-University Bochum, Bochum, Germany.,Klinik für Anästhesiologie, Intensivmedizin und Schmerztherapie, Universitätsklinikum Knappschaftskrankenhaus Bochum GmbH, Bochum, Germany
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Zhang H, Yan HL, Li XY, Guo YN. TNFSF14, a novel target of miR-326, facilitates airway remodeling in airway smooth muscle cells via inducing extracellular matrix protein deposition and proliferation. Kaohsiung J Med Sci 2020; 36:508-514. [PMID: 32118359 DOI: 10.1002/kjm2.12197] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 01/12/2020] [Accepted: 02/12/2020] [Indexed: 12/16/2022] Open
Abstract
As a common chronic respiratory disease, the incidence of asthma is increasing in recent years worldwide. Airway remodeling is the primary pathological basis of refractory asthma, but the studies about the underlying mechanism of airway remodeling was a lack. In the study, we aimed to investigate the effects and mechanisms of miR-326 on airway remodeling in airway smooth muscle cells (ASMCs). The results showed that transforming growth factor-β1 (TGF-β1) accelerated matrix protein deposition by increasing the expression levels of collagen I and fibronectin, and promoted proliferative ability of ASMCs. However, miR-326 was significantly downregulated in TGF-β1-treated ASMCs. MiR-326 mimics robustly decreased the collagen I and fibronectin levels and inhibited cell proliferation of TGF-β1-treated ASMCs. Luciferase assay investigated that tumor necrosis factor superfamily member 14 (TNFSF14) was a direct target of miR-326. The expression of TNFSF14 was negatively regulated by miR-326. Moreover, exogenous TNFSF14 effectively reversed the inhibitory effects of miR-326 overexpression on the expression levels of collagen I and fibronectin, and promoted cell proliferation of TGF-β1-treated ASMCs. In conclusion, miR-326 suppressed matrix protein deposition and cell proliferation of TGF-β1-treated ASMCs via inhibiting TNFSF14. MiR-326 might be a promising novel therapeutic target for asthma.
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Affiliation(s)
- Hui Zhang
- Department of Pediatric, Affiliated Hospital of Changchun University of Chinese Medicine, Changchun, Jilin Province, China
| | - Huan-Li Yan
- Department of Neonatology, The Second People's Hospital of Liaocheng, Liaocheng, Shandong Province, China
| | - Xiang-Yu Li
- Department of Pediatric, Affiliated Hospital of Changchun University of Chinese Medicine, Changchun, Jilin Province, China
| | - Yi-Nan Guo
- Department of Pediatric, Affiliated Hospital of Changchun University of Chinese Medicine, Changchun, Jilin Province, China
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Serra DS, Araujo RS, Oliveira MLM, Cavalcante FSA, Leal-Cardoso JH. Lung injury caused by occupational exposure to particles from the industrial combustion of cashew nut shells: a mice model. ARCHIVES OF ENVIRONMENTAL & OCCUPATIONAL HEALTH 2020; 76:1-11. [PMID: 32048551 DOI: 10.1080/19338244.2020.1726269] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cashew nut shells (CNS) is already used in the energy matrix of some industries. However, it is necessary to know the harmful health effects generated by exposure to pollutants of its combustion, especially in the workers exposed to industrial pollutants. In addition, it is known that the incidence of asthma grows among workers in industries, and due to its previously reported biological effects of anethole, these will also be objects of the present study. We used 64 Balb/C mice, randomly divided into eight groups. Groups were sensitized and challenged with saline or ovalbumin, then subjected to intranasal instillation of 30 µg PM4.0 (occupational exposure) from the combustion of CNS or saline, and then were subsequently treated with oral anethole 300 mg/kg or 0.1% Tween 80. Our results serve as a starting point for the development of public policies for the prevention of diseases in workers that are exposed to the pollutants coming from industries.
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Affiliation(s)
- D S Serra
- Science and Technology Center, State University of Ceará, Fortaleza-Ceará, Brazil
| | - R S Araujo
- Department of Chemistry and Environment, Federal Institute of Ceará, Ceará, Brazil
| | - M L M Oliveira
- Science and Technology Center, State University of Ceará, Fortaleza-Ceará, Brazil
| | - F S A Cavalcante
- Science and Technology Center, State University of Ceará, Fortaleza-Ceará, Brazil
| | - J H Leal-Cardoso
- Ceará, Institute of Biomedical Sciences State University of Ceará, Ceará, Brazil
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Baek SJ, Chun JM, Kang TW, Seo YS, Kim SB, Seong B, Jang Y, Shin GH, Kim C. Identification of Epigenetic Mechanisms Involved in the Anti-Asthmatic Effects of Descurainia sophia Seed Extract Based on a Multi-Omics Approach. Molecules 2018; 23:molecules23112879. [PMID: 30400597 PMCID: PMC6278437 DOI: 10.3390/molecules23112879] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 10/29/2018] [Accepted: 10/30/2018] [Indexed: 01/17/2023] Open
Abstract
Asthma, a heterogeneous disease of the airways, is common around the world, but little is known about the molecular mechanisms underlying the interactions between DNA methylation and gene expression in relation to this disease. The seeds of Descurainia sophia are traditionally used to treat coughs, asthma and edema, but their effects on asthma have not been investigated by multi-omics analysis. We undertook this study to assess the epigenetic effects of ethanol extract of D. sophia seeds (DSE) in an ovalbumin (OVA)-induced mouse model of asthma. We profiled genome-wide DNA methylation by Methyl-seq and characterized the transcriptome by RNA-seq in mouse lung tissue under three conditions: saline control, OVA-induced, and DSE-treated. In total, 1995 differentially methylated regions (DMRs) were identified in association with anti-asthmatic effects, most in promoter and coding regions. Among them, 25 DMRs were negatively correlated with the expression of the corresponding 18 genes. These genes were related to development of the lung, respiratory tube and respiratory system. Our findings provide insights into the anti-asthmatic effects of D. sophia seeds and reveal the epigenetic targets of anti-inflammatory processes in mice.
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Affiliation(s)
- Su-Jin Baek
- Bioinformatics Group, R&D Center, Insilicogen Corporation, 35, Techno 9-ro, Yuseong-gu, Daejeon 34027, Korea.
| | - Jin Mi Chun
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, 1672 Yuseong-daero, Yuseong-gu, Daejeon 34054, Korea.
| | - Tae-Wook Kang
- Bioinformatics Group, R&D Center, Insilicogen Corporation, 35, Techno 9-ro, Yuseong-gu, Daejeon 34027, Korea.
| | - Yun-Soo Seo
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, 1672 Yuseong-daero, Yuseong-gu, Daejeon 34054, Korea.
| | - Sung-Bae Kim
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, 1672 Yuseong-daero, Yuseong-gu, Daejeon 34054, Korea.
| | - Boseok Seong
- Future Medicine Division, Korea Institute of Oriental Medicine, 1672 Yuseong-daero, Yuseong-gu, Daejeon 34054, Korea.
| | - Yunji Jang
- Future Medicine Division, Korea Institute of Oriental Medicine, 1672 Yuseong-daero, Yuseong-gu, Daejeon 34054, Korea.
| | - Ga-Hee Shin
- Bioinformatics Group, R&D Center, Insilicogen Corporation, 35, Techno 9-ro, Yuseong-gu, Daejeon 34027, Korea.
| | - Chul Kim
- Future Medicine Division, Korea Institute of Oriental Medicine, 1672 Yuseong-daero, Yuseong-gu, Daejeon 34054, Korea.
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Kuribayashi K, Iida SI, Nakajima Y, Funaguchi N, Tabata C, Fukuoka K, Fujimori Y, Ihaku D, Nakano T. Suppression of heme oxygenase-1 activity reduces airway hyperresponsiveness and inflammation in a mouse model of asthma. J Asthma 2015; 52:662-8. [PMID: 26133060 DOI: 10.3109/02770903.2015.1008138] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE Carbon monoxide (CO) levels in expired gas are higher in patients with bronchial asthma than in healthy individuals. Heme oxygenase-1 (HO-1) is a rate-limiting enzyme that catalyzes the degradation of heme to yield biliverdin, CO and free iron. Thus, HO-1 is implicated in the pathogenesis of bronchial asthma. However, whether HO-1 expression and activity in lung tissue are related to allergic airway inflammation remains unclear. We investigated whether expression of HO-1 is related to allergic airway inflammation in lungs and whether HO-1 could influence airway hyperresponsiveness and eosinophilia in mice sensitized to ovalbumin (OVA). METHODS C57BL/6 mice immunized with OVA were challenged thrice with an aerosol of OVA every second day for 8 days. HO-1-positive cells were identified by immunostaining in lung tissue, and zinc protoporphyrin (Zn-PP), a competitive inhibitor of HO-1, was administered intraperitoneally to OVA-immunized C57BL/6 mice on day 23 (day before inhalation of OVA) and immediately before inhalation on the subsequent 4 days (total five doses). Mice were analyzed for effects of HO-1 on AHR, inflammatory cell infiltration and cytokine levels in lung tissue. Ethical approval was obtained from the concerned institutional review board. RESULTS Number of HO-1-positive cells increased in the subepithelium of the bronchi after OVA challenge, and HO-1 localized to alveolar macrophages. Zn-PP clearly inhibited AHR, pulmonary eosinophilia and IL-5 and IL-13 expression in the lung tissue. CONCLUSION Expression of HO-1 is induced in lung tissue during attacks of allergic bronchial asthma, and its activity likely amplifies and prolongs allergic airway inflammation.
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Affiliation(s)
- Kozo Kuribayashi
- a Department of Respiratory Medicine , Hyogo College of Medicine , Nishinomiya , Hyogo , Japan
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Lu LQ, Liao W. Screening and functional pathway analysis of genes associated with pediatric allergic asthma using a DNA microarray. Mol Med Rep 2015; 11:4197-203. [PMID: 25633562 PMCID: PMC4394950 DOI: 10.3892/mmr.2015.3277] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Accepted: 01/02/2015] [Indexed: 12/29/2022] Open
Abstract
The present study aimed to identify differentially expressed genes (DEGs) associated with pediatric allergic asthma, and to analyze the functional pathways of the selected target genes, in order to explore the pathogenesis of the disease. The GSE18965 gene expression profile was downloaded from the Gene Expression Omnibus database and was preprocessed. This gene expression profile consisted of seven normal samples and nine samples from patients with pediatric allergic asthma. The DEGs between the normal and pediatric allergic asthma samples were screened using limma package in R, and the cut‑off value was set at false discovery rate <0.05 and log fold change >1. Following hierarchical clustering of the DEGs based on the expression profiles, the up‑ and downregulated genes underwent a functional enrichment analysis by topological approach (P<0.05), using the Database for Annotation, Visualization and Integrated Discovery. A total of 127 DEGs were identified between the normal and pediatric allergic asthma samples. The up‑ and downregulated genes were significantly enriched in the actin filament‑based process and the monosaccharide metabolic process, respectively. Seven downregulated DEGs (M6PR, TPP1, GLB1, NEU1, ACP2, LAMP1 and HGSNAT) were identified in the lysosomal pathway, with P=6.4x10(‑9). These results suggested that variation in lysosomal function, triggered by the seven downregulated genes, may lead to aberrant functioning of the T lymphocytes, resulting in asthma. Further research regarding the treatment of pediatric allergic asthma through targeting lysosomal function is required.
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Affiliation(s)
- Li-Qun Lu
- Department of Pediatrics, First Hospital Affiliated to Chengdu Medical College, Chengdu, Sichuan 610500, P.R. China
| | - Wei Liao
- Department of Pediatrics, Southwest Hospital, The Third Military Medical University, Chongqing 400038, P.R. China
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Huang FY, Wang CC, Huang YH, Zhao HG, Guo JL, Zhou SL, Wang H, Lin YY, Tan GH. Antigen 43/Fcε3 chimeric protein expressed by a novel bacterial surface expression system as an effective asthma vaccine. Immunology 2014; 143:230-40. [PMID: 24750112 DOI: 10.1111/imm.12302] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 04/07/2014] [Accepted: 04/15/2014] [Indexed: 12/29/2022] Open
Abstract
The IgE Fcε3 domain is an active immunotherapeutic target for asthma and other allergic diseases. However, previous methods for preparing IgE fusion protein vaccines are complex. Antigen 43 (Ag43) is a surface protein found in Escherichia coli that contains α and β subunits (the α subunit contains multiple T epitopes). Here we constructed a novel Ag43 surface display system (Ag43 system) to express Ag43 chimeric proteins to disrupt immune tolerance against IgE. The Ag43 system was constructed from the E. coli strain Tan109, in which the Ag43 gene was deleted and a recombinant plasmid (pETAg43) expressing a partial Ag43 gene was introduced. The Fcε3 domain of the IgE gene was then subcloned into plasmid pETAg43, resulting in a recombinant plasmid pETAg43/Fcε3, which was used to transform Tan109 for Ag43/Fcε3 surface expression. Thereafter, Ag43/Fcε3 was investigated as an asthma vaccine in a mouse model. Ag43/Fcε3 was expressed on and could be separated from the bacterial surface by heating to 60° while retaining activity. Ag43/Fcε3, as a protein vaccine, produced neutralizing autoantibodies to murine IgE, induced significant anti-asthma effects, and regulated IgE and T helper cytokines in a murine asthma model. Data show that Ag43/Fcε3 chimeric protein is a potential model vaccine for asthma treatment, and that the Ag43 system may be an effective tool for novel vaccine preparation to break immune tolerance to other self-molecules.
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Affiliation(s)
- Feng-Ying Huang
- Hainan Provincial Key Laboratory of Tropical Medicine, Hainan Medical College, Haikou, China
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Nebulized perflubron and carbon dioxide rapidly dilate constricted airways in an ovine model of allergic asthma. Respir Res 2014; 15:98. [PMID: 25355286 PMCID: PMC4172894 DOI: 10.1186/s12931-014-0098-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 08/13/2014] [Indexed: 12/14/2022] Open
Abstract
Background The low toxicity of perfluorocarbons (PFCs), their high affinity for respiratory gases and their compatibility with lung surfactant have made them useful candidates for treating respiratory diseases such as adult respiratory distress syndrome. We report results for treating acute allergic and non-allergic bronchoconstriction in sheep using S-1226 (a gas mixture containing carbon dioxide and small volumes of nebulized perflubron). The carbon dioxide, which is highly soluble in perflubron, was used to relax airway smooth muscle. Methods Sheep previously sensitized to house dust mite (HDM) were challenged with HDM aerosols to induce early asthmatic responses. At the maximal responses (characterised by an increase in lung resistance), the sheep were either not treated or treated with one of the following; nebulized S-1226 (perflubron + 12% CO2), nebulized perflubron + medical air, 12% CO2, salbutamol or medical air. Lung resistance was monitored for up to 20 minutes after cessation of treatment. In additional naïve sheep, a segmental bronchus was pre-contracted with methacholine (MCh) and treated with nebulized S-1226 administered via a bronchoscope catheter. Subsequent bronchodilatation was monitored by real time digital video recording. Results Treatment with S-1226 for 2 minutes following HDM challenge resulted in a more rapid, more profound and more prolonged decline in lung resistance compared with the other treatment interventions. Video bronchoscopy showed an immediate and complete (within 5 seconds) re-opening of MCh-constricted airways following treatment with S-1226. Conclusions S-1226 is a potent and rapid formulation for re-opening constricted airways. Its mechanism(s) of action are unknown. The formulation has potential as a rescue treatment for acute severe asthma. Electronic supplementary material The online version of this article (doi:10.1186/s12931-014-0098-x) contains supplementary material, which is available to authorized users.
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Renne J, Hinrichs J, Schönfeld C, Gutberlet M, Winkler C, Faulenbach C, Jakob P, Schaumann F, Krug N, Wacker F, Hohlfeld JM, Vogel-Claussen J. Noninvasive quantification of airway inflammation following segmental allergen challenge with functional MR imaging: a proof of concept study. Radiology 2014; 274:267-75. [PMID: 25203130 DOI: 10.1148/radiol.14132607] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
PURPOSE To evaluate oxygen-enhanced T1-mapping magnetic resonance (MR) imaging as a noninvasive method for visualization and quantification of regional inflammation after segmental allergen challenge in asthmatic patients compared with control subjects. MATERIALS AND METHODS After institutional review board approval, nine asthmatic and four healthy individuals gave written informed consent. MR imaging (1.5 T) was performed by using an inversion-recovery snapshot fast low-angle shot sequence before (0 hours) and 6 hours and 24 hours after segmental allergen challenge by using either normal- or low-dose allergen or saline. The volume of lung tissue with increased relaxation times was determined by using a threshold-based method. As a biomarker for oxygen transfer from the lungs into the blood, the oxygen transfer function ( OTF oxygen transfer function ) was calculated. After the third MR imaging examination, eosinophils in bronchoalveolar lavage fluid were counted. Differences between times and segments were analyzed with nonparametric Wilcoxon matched-pairs test and Spearman correlation. RESULTS In lung segments treated with the standard dose of allergen, the OTF oxygen transfer function was decreased at 6 hours in asthmatic patients, compared with saline-treated segments (P = .0078). In asthmatic patients at 24 hours, the volume over threshold was significantly increased in normal allergen dose-treated segments compared with saline-treated segments (P = .004). In corresponding lung segments, the volume over threshold at 24 hours in the asthmatic group showed a positive correlation (r = 0.65, P = .0001) and the OTF oxygen transfer function at 6 hours showed an inverse correlation (r = -0.67, P = .0001) with the percentage of eosinophils in the bronchoalveolar lavage fluid. CONCLUSION OTF oxygen transfer function and volume over threshold are noninvasive MR imaging-derived parameters to visualize and quantify the regional allergic reaction after segmental endobronchial allergen challenge.
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Affiliation(s)
- Julius Renne
- From the Department of Diagnostic and Interventional Radiology (J.R., J.H., C.S., M.G., F.W., J.V.), Fraunhofer Institute for Toxicology and Experimental Medicine (C.W., C.F., F.S., N.K., J.M.H.), and Department of Pneumology (C.W., J.M.H.), Hannover Medical School, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research, OE 8220, Carl-Neuberg-Str 1, 30625 Hannover, Germany; and Department of Experimental Physics (Biophysics), University of Würzburg, Würzburg, Germany (P.J.)
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Kannan AK, Sahu N, Mohanan S, Mohinta S, August A. IL-2-inducible T-cell kinase modulates TH2-mediated allergic airway inflammation by suppressing IFN-γ in naive CD4+ T cells. J Allergy Clin Immunol 2013; 132:811-20.e1-5. [PMID: 23768572 PMCID: PMC4033298 DOI: 10.1016/j.jaci.2013.04.033] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2012] [Revised: 04/21/2013] [Accepted: 04/24/2013] [Indexed: 01/02/2023]
Abstract
BACKGROUND Asthma is a predominantly TH2 cell-dominated inflammatory disease characterized by airway inflammation and a major public health concern affecting millions of persons. The Tec family tyrosine kinase IL-2-inducible T-cell kinase (Itk) is primarily expressed in T cells and critical for the function and differentiation of TH cells. Itk(-/-) mice have a defective TH2 response and are not susceptible to allergic asthma. OBJECTIVE We sought to better understand the role of Itk signaling in TH differentiation programs and in the development and molecular pathology of allergic asthma. METHODS Using a murine model of allergic airway inflammation, we dissected the role of Itk in regulating TH cell differentiation through genetic ablation of critical genes, chromatin immunoprecipitation assays, and house dust mite-driven allergic airway inflammation. RESULTS Peripheral naive Itk(-/-) CD4(+) T cells have substantially increased transcripts and expression of the prototypic TH1 genes Eomesodermin, IFN-γ, T-box transcription factor (T-bet), and IL-12Rβ1. Removal of IFN-γ on the Itk(-/-) background rescues expression of TH2-related genes in TH cells and allergic airway inflammation in Itk(-/-) mice. Furthermore, small hairpin RNA-mediated knockdown of Itk in human peripheral blood T cells results in increased expression of mRNA for IFN-γ and T-bet and reduction in expression of IL-4. CONCLUSION Our results indicate that Itk signals suppress the expression of IFN-γ in naive CD4(+) T cells, which in a positive feed-forward loop regulates the expression of TH1 factors, such as T-bet and Eomesodermin, and suppress development of TH2 cells and allergic airway inflammation.
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Affiliation(s)
- Arun K. Kannan
- Department of Microbiology and Immunology, Cornell University, Ithaca
| | - Nisebita Sahu
- Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park
| | - Sunish Mohanan
- Baker Institute for Animal Health, Department of Biomedical Sciences, Cornell University, Ithaca
| | - Sonia Mohinta
- Department of Microbiology and Immunology, Cornell University, Ithaca
| | - Avery August
- Department of Microbiology and Immunology, Cornell University, Ithaca
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Chen CG, Wang HY, Dai Y, Wang JL, Xu WH. Tripterygium polyglycosid attenuates the established airway inflammation in asthmatic mice. Chin J Integr Med 2013; 19:282-8. [PMID: 23321997 DOI: 10.1007/s11655-013-1410-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Indexed: 01/08/2023]
Abstract
OBJECTIVE To investigate the effect of Tripterygium polyglycosid on establishing airway eosinophil infiltration and related airway hyperresponsiveness of asthmatic mice. METHODS A mature murine asthmatic model was made with ovabulmin sensitized and challenged C57BL/6 mice. Forty mice were divided into four groups with 10 mice in each group: mice sensitized and challenged with saline (WS group), mice sensitized and challenged with ovalbumin (WO group), mice sensitized and challenged with ovalbumin and treated with Tripterygium polyglycosid (TP group) and Dexamethasone (DXM group). The mice were intraperitoneally injected with 20 μg chicken ovabulmin emulsified in injected alum on days 0 and 14, then were challenged with an aerosol generated from 1% ovabulmin on days 24, 25 and 26. Tripterygium polyglycosid was injected intraperitoneally at 50 mg/kg on days 25, 26 and 27 after ovabulmin challenge. Dexamethasone was administrated to mice at 2 mg/kg on day 21, 23 before ovabulmin challenge. The airway hyperresponsiveness, mucus production, eosinophils in parabronchial area and bronchoalveolar lavage fluid and the level of interleukin-5, granulo-macrophage clone stimulating factor in bronchoalveolar lavage fluid were measured as indexes of inflammation. RESULTS Tripterygium polyglycosid treatment after ovabulmin challenge completely inhibited eosinophil infiltration in bronchoalveolar lavage fluid [(0.63 ± 0.34)× 10(4) vs. (75.0 ± 14.8)× 10(4), P<0.05] and the peribrochial area (12.60 ± 3.48 mm(2) vs. 379.0 ± 119.3 mm(2), P<0.05), mucus overproduction in airway (2.8 ± 1.7 vs. 7.1±5.6, P<0.05), and increased interleukin-5 levels in bronchoalveolar lavage fluid (28.8 ± 2.8 pg/mL vs. 7.5 ± 3.5 pg/mL, P<0.05). Meanwhile, Tripterygium polyglycosid treatment after ovabulmin challenge also partially inhibited airway hyperresponsiveness. The level of granulo-macrophage clone stimulating factor in bronchoalveolar lavage fluid didn't change with drugs intervention. CONCLUSIONS The administration of Tripterygium polyglycosid could inhibit the established airway inflammation and reduce the airway hyperresponsiveness of allergic asthmatic mice. It provides a possible alternative therapeutic for asthma.
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Affiliation(s)
- Chang-Gui Chen
- Department of General Practice, the Second Affiliated Hospital of Zhejiang University Medical College, Hangzhou 310006, China
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Van Scott MR, Chandler J, Olmstead S, Brown JM, Mannie M. Airway Anatomy, Physiology, and Inflammation. THE TOXICANT INDUCTION OF IRRITANT ASTHMA, RHINITIS, AND RELATED CONDITIONS 2013. [PMCID: PMC7122617 DOI: 10.1007/978-1-4614-9044-9_2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Guo CH, Chen PC, Hsia S, Hsu GSW, Liu PJ. The relationship of plasma aluminum to oxidant-antioxidant and inflammation status in asthma patients. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2013; 35:30-38. [PMID: 23228705 DOI: 10.1016/j.etap.2012.10.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2012] [Revised: 10/25/2012] [Accepted: 10/28/2012] [Indexed: 06/01/2023]
Abstract
Aluminum (Al) is a non-essential mineral which human beings are exposed to on day-to-day life. The purpose of this study was to assess the concentrations of plasma Al and the relationship of those levels with risk factors for asthma. In total, 27 allergic asthmatics and 30 healthy volunteers were enrolled. Plasma Al and selected blood parameters were measured, and a pulmonary function test was performed. Higher Al concentrations were found in the asthmatics than the healthy controls. Increased immunoglobulin E, high-sensitivity C-reactive protein, lipid peroxidation products, and pro-inflammatory cytokines (tumor necrosis factor-α and interleukin [IL]-4) were observed, but IL-10 and overall antioxidant and enzyme activities were lower. Associations between oxidative-antioxidant status and inflammatory markers with plasma Al levels in asthmatics were noted. Al status was also linked to cytokine concentrations and pulmonary function. In conclusion, abnormal Al distribution may further precipitate oxidative stress and inflammation, alter Th1/Th2 lymphocyte balance, and therefore contribute to the development of asthma.
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Affiliation(s)
- Chih-Hung Guo
- Micro-Nutrition Lab, Institute of Biomedical Nutrition, Hung Kuang University, Taichung 433, Taiwan, ROC
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18
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Zhong NS, Ping ZJ, Humphries MJ, Xin D. Salmeterol/Fluticasone Propionate in a Single Inhaler is Superior to Budesonide Alone in Control of Chinese Asthmatic Adults : An Open-Label, Randomised, 6-Week Study. Clin Drug Investig 2012; 24:583-92. [PMID: 17523720 DOI: 10.2165/00044011-200424100-00004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
OBJECTIVE AND DESIGN There is comparatively little information on asthma management in China. A multicentre, randomised, open-label, parallel-group, 6-week treatment study was conducted to evaluate the efficacy and safety of salmeterol/fluticasone propionate combination treatment in Chinese adult asthmatic patients. SETTING AND PATIENTS 398 patients with a documented history of moderate-to-severe asthma were randomised to treatment. INTERVENTIONS Salmeterol 50mug/fluticasone propionate 100mug twice daily for 6 weeks via Accuhaler((R)) (Diskustrade mark) inhaler and budesonide 400mug twice daily for 6 weeks via Turbuhaler((R)) inhaler. MAIN OUTCOME MEASURES AND RESULTS Morning peak expiratory flow (PEF) was investigated as the primary efficacy endpoint; evening PEF, use of salbutamol (albuterol) as rescue medication, and day- and night-time asthma symptom scores were secondary efficacy endpoints. Safety was assessed according to adverse events recorded. Over the 6-week treatment period, salmeterol/fluticasone propionate led to a significantly greater increase in morning (p < 0.0001) and evening (p = 0.0066) PEF compared with budesonide. Moreover, the significant benefit of salmeterol/fluticasone propionate was evident from the first week. Similarly, salmeterol/fluticasone propionate led to significantly greater improvements in the use of rescue medication and day- and night-time asthma symptom scores, compared with budesonide. Both treatments were well tolerated, with a similar incidence (23%) of adverse events in both treatment groups and no serious adverse events. CONCLUSIONS Salmeterol/fluticasone propionate 50mug /100mug twice daily was significantly more effective than budesonide 400mug twice daily in improving lung function and reducing symptoms and use of rescue medication in Chinese asthmatic patients who were poorly controlled on low-dose inhaled corticosteroids. This confirms the findings of superior efficacy of this combination product over budesonide in other populations.
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Affiliation(s)
- Nan Shan Zhong
- Guangzhou Institute of Respiratory Disease, Guangzhou, China
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Kim HK, Lee CH, Kim JM, Ayush O, Im SY, Lee HK. Biphasic late airway hyperresponsiveness in a murine model of asthma. Int Arch Allergy Immunol 2012; 160:173-83. [PMID: 23018605 DOI: 10.1159/000341645] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Accepted: 07/06/2012] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Nonspecific airway hyperresponsiveness (AHR) is one of the cardinal features of bronchial asthma. Early AHR is caused by chemical mediators released from pulmonary mast cells activated in an IgE-dependent way. However, the mechanism of late AHR remains unclear. METHODS Features of airway allergic inflammation were analyzed, including antigen-induced AHR, using a murine model of asthma. The model was suitable for examining the sequential early molecular events occurring after the initial airway exposure to antigen. RESULTS AHR increased at 10-12 h after airway challenge, followed by the second-phase response, which was larger and broader in resistance at 18-30 h. Pretreatment of sensitized animals with anti-tumor necrosis factor (TNF) before airway challenge or induction of allergic asthma in TNF(-/-) mice resulted in abrogation of the first-phase late AHR. Intratracheal instillation of TNF induced a single peak of AHR at 10 h. IgE and IgG immune complexes induced the development of the first-phase late AHR by TNF production. Pretreatment with cytosolic phospholipase inhibitor and 5-lipoxygenase inhibitors abolished the first-phase late AHR as well as the leukotriene B(4) levels in the airway. CpG-oligodeoxynucleotide (ODN) pretreatment reduced airway levels of Th2 cytokines, eosinophil infiltration and second-phase late AHR. However, CpG-ODN did not reduce TNF levels or the magnitude of first-phase late AHR. CONCLUSION Biphasic late AHR occurs in a murine model of asthma. First- and second-phase late AHR is caused by TNF and Th2 response, respectively.
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Affiliation(s)
- Hae-Kyoung Kim
- Department of Immunology, Chonbuk National University Medical School, Jeonju, Republic of Korea
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Guo CH, Liu PJ, Hsia S, Chuang CJ, Chen PC. Role of certain trace minerals in oxidative stress, inflammation, CD4/CD8 lymphocyte ratios and lung function in asthmatic patients. Ann Clin Biochem 2011; 48:344-51. [PMID: 21546427 DOI: 10.1258/acb.2011.010266] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
BACKGROUND Asthma is associated with increased inflammation, oxidative stress and abnormal immune system function. We determined the distributions of several essential trace minerals and assessed their relationships to factors that are associated with the pathophysiological status of patients with mild/moderate asthma. METHODS We enrolled 25 asthmatic patients and 25 healthy subjects. We measured: blood trace minerals, zinc (Zn), copper (Cu) and selenium (Se); oxidative stress markers thiobarbituric acid reactive substances (TBARS); antioxidant enzyme activities; percentages of CD4 and CD8 lymphocyte subsets; high-sensitivity C-reactive protein (hs-CRP); and a lung function index (FEV1/FVC%). RESULTS Compared with healthy subjects, asthmatics had lower concentrations of Zn and Se; higher Cu concentrations, and Cu/Zn and Cu/Se ratios; and lower antioxidant enzyme glutathione peroxidase (GPx), glutathione reductase (GR) and catalase activities. Significantly increased concentrations of hs-CRP, TBARS and CD4/CD8 lymphocyte ratios were also observed. Furthermore, plasma TBARS or hs-CRP concentrations were negatively associated with Se concentrations, but were positively associated with Cu/Se ratios. CD4/CD8 lymphocyte ratios were inversely correlated with Se, while it was positively correlated with Cu/Se ratio. FEV1/FVC% was also significantly correlated with Se concentrations, and Cu/Se and Cu/Zn ratios. CONCLUSIONS Abnormal distributions of these trace minerals may aggravate oxidative damage and inflammation, increased CD4/CD8 lymphocyte ratios and decreased lung function in asthma.
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Affiliation(s)
- Chih-Hung Guo
- Institute of Biomedical Nutrition, Hung Kuang University, Taichung, Taiwan, Republic of China
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Jin C, Shelburne CP, Li G, Potts EN, Riebe KJ, Sempowski GD, Foster WM, Abraham SN. Particulate allergens potentiate allergic asthma in mice through sustained IgE-mediated mast cell activation. J Clin Invest 2011; 121:941-55. [PMID: 21285515 PMCID: PMC3049384 DOI: 10.1172/jci43584] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2010] [Accepted: 12/01/2010] [Indexed: 11/17/2022] Open
Abstract
Allergic asthma is characterized by airway hyperresponsiveness, inflammation, and a cellular infiltrate dominated by eosinophils. Numerous epidemiological studies have related the exacerbation of allergic asthma with an increase in ambient inhalable particulate matter from air pollutants. This is because inhalable particles efficiently deliver airborne allergens deep into the airways, where they can aggravate allergic asthma symptoms. However, the cellular mechanisms by which inhalable particulate allergens (pAgs) potentiate asthmatic symptoms remain unknown, in part because most in vivo and in vitro studies exploring the pathogenesis of allergic asthma use soluble allergens (sAgs). Using a mouse model of allergic asthma, we found that, compared with their sAg counterparts, pAgs triggered markedly heightened airway hyperresponsiveness and pulmonary eosinophilia in allergen-sensitized mice. Mast cells (MCs) were implicated in this divergent response, as the differences in airway inflammatory responses provoked by the physical nature of the allergens were attenuated in MC-deficient mice. The pAgs were found to mediate MC-dependent responses by enhancing retention of pAg/IgE/FcεRI complexes within lipid raft–enriched, CD63(+) endocytic compartments, which prolonged IgE/FcεRI-initiated signaling and resulted in heightened cytokine responses. These results reveal how the physical attributes of allergens can co-opt MC endocytic circuitry and signaling responses to aggravate pathological responses of allergic asthma in mice.
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Affiliation(s)
- Cong Jin
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina 27514, USA
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Effect of short-term oral and inhaled corticosteroids on airway inflammation and responsiveness in a feline acute asthma model. Vet J 2011; 192:41-8. [PMID: 21354836 DOI: 10.1016/j.tvjl.2011.01.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2010] [Revised: 01/17/2011] [Accepted: 01/24/2011] [Indexed: 12/17/2022]
Abstract
The objective of this study was to investigate whether high-dose inhaled fluticasone propionate (FP), alone or in combination with salmeterol (SAL), is as effective as oral prednisolone in reducing airway inflammation and obstruction in cats with experimentally-induced acute asthma. Six cats sensitised to Ascaris suum (AS) were enrolled in a prospective controlled therapeutic trial and underwent four aerosol challenges, at 1-month intervals with AS allergen. The allergen - stimulated animals received four consecutive days treatment with either oral prednisolone at 1mg/kg twice daily, 500 μg of FP inhaled twice daily, or a combination of FP/SAL at 500 μg/50 μg inhaled twice daily, respectively, according to a randomised cross-over design. Treatment-related changes in lung function, airway responsiveness (AR) and bronchoalveolar lavage fluid (BALF) cytology were assessed. Barometric whole-body plethysmography (BWBP) was used for the assessment of respiratory variables and AR. No significant differences in respiratory rate or Penh (an estimate of airflow limitation measured by BWBP) were detected among treatment groups. Allergen-induced airway hyper-responsiveness was significantly inhibited by all three steroid treatments (P<0.05). The mean BALF eosinophil percentage (±SEM) was lower after oral and inhaled corticosteroid treatment and these changes were significant for groups receiving prednisolone and the FP/SAL combination. Findings suggest high-dose FP, particularly in combination with SAL, is effective in ameliorating airway inflammation and hyper-responsiveness in this model of acute feline asthma, and highlight the potential use of these drugs in cats experiencing acute exacerbations of the naturally occurring disease.
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de Oliveira APL, Lino-Dos-Santos-Franco A, Hamasato EK, Quinteiro-Filho W, Hebeda CB, Damazo AS, Farsky SHP, Tavares-de-Lima W, Palermo-Neto J. Amphetamine modulates cellular recruitment and airway reactivity in a rat model of allergic lung inflammation. Toxicol Lett 2010; 200:117-23. [PMID: 21093552 DOI: 10.1016/j.toxlet.2010.11.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2010] [Revised: 11/08/2010] [Accepted: 11/10/2010] [Indexed: 10/18/2022]
Abstract
Asthma is characterized by pulmonary cellular infiltration, vascular exudation and airway hyperresponsiveness. Several drugs that modify central nervous system (CNS) activity can modulate the course of asthma. Amphetamine (AMPH) is a highly abused drug that presents potent stimulating effects on the CNS and has been shown to induce behavioral, biochemical and immunological effects. The purpose of this study was to investigate the effects of AMPH on pulmonary cellular influx, vascular permeability and airway reactivity. AMPH effects on adhesion molecule expression, IL-10 and IL-4 release and mast cell degranulation were also studied. Male Wistar rats were sensitized with ovalbumin (OVA) plus alum via subcutaneous injection. One week later, the rats received another injection of OVA-alum (booster). Two weeks after this booster, the rats were subjected to AMPH treatment 12 h prior to the OVA airway challenge. In rats treated with AMPH, the OVA challenge reduced cell recruitment into the lung, the vascular permeability and the cellular expression of ICAM-1 and Mac-1. Additionally, elevated levels of IL-10 and IL-4 were found in samples of lung explants from allergic rats. AMPH treatment, in comparison, increased IL-10 levels but reduced those of IL-4 in the lung explants. Moreover, the tracheal responsiveness to methacholine (MCh), as well as to an in vitro OVA challenge, was reduced by AMPH treatment, and levels of PCA titers were not modified by the drug. Our findings suggest that single AMPH treatment down-regulates several parameters of lung inflammation, such as cellular migration, vascular permeability and tracheal responsiveness. These results also indicate that AMPH actions on allergic lung inflammation include endothelium-leukocyte interaction mechanisms, cytokine release and mast cell degranulation.
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Increased oxidative stress in the airway and development of allergic inflammation in a mouse model of asthma. Ann Allergy Asthma Immunol 2009; 103:238-47. [PMID: 19788022 DOI: 10.1016/s1081-1206(10)60188-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND The exact pathogenic role of oxidative stress in the development of allergic airway inflammation is still largely unknown. OBJECTIVE To investigate a possible link between increased pulmonary oxidative stress and the pivotal features of asthma during the mounting of an allergic inflammatory response. METHODS To determine the relationship between oxidative stress and allergic inflammatory responses, we evaluated the sequential kinetics of oxidative stress in the lung, the development of airway inflammation, mucin hypersecretion, and airway hyperresponsiveness (AHR) in an ovalbumin (OVA)-sensitized and challenged mouse with and without antioxidant. Parameters were measured at 9 points for more than 28 days, starting from the first day of OVA challenge with or without antioxidant treatment. The ratio of reduced to oxidized glutathione in the lungs and levels of intracellular reactive oxygen species (ROS) in the bronchial epithelium were serially measured. Bronchoalveolar lavage fluid cells, histopathologic features, and AHR were analyzed at the same time points. RESULTS The reduced to oxidized glutathione ratio was reduced from immediately after OVA challenge to day 1, remained at this level until day 1, and rapidly recovered to the normal level after more than 2 days. Intracellular ROS levels in the bronchial epithelium followed similar kinetics. The inflammatory cells in bronchoalveolar lavage fluid reached a maximum of 3 days and decreased progressively thereafter. Histopathologic examination revealed that substantial airway inflammation persisted through day 28. The proportion of mucin-producing epithelial cells significantly increased after day 1, reached a maximum at day 3, and remained at this level until day 5. The AHR peaked on day 1 and normalized within 5 days. The pretreatment of antioxidant significantly reduced not only the increased ROS levels but also development of other phenotypes of asthma. CONCLUSION These results indicate that increased oxidative stress in the lung precedes other pivotal phenotypes of allergic airway disease, suggesting a critical role for increased oxidative stress in the induction of allergic airway inflammation.
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Expression of GATA3, T-bet, IL-4, and IFN-gamma mRNA in the effusion of OME patients. Int J Pediatr Otorhinolaryngol 2009; 73:1119-23. [PMID: 19481821 DOI: 10.1016/j.ijporl.2009.04.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2008] [Revised: 04/18/2009] [Accepted: 04/21/2009] [Indexed: 11/22/2022]
Abstract
OBJECTIVE The role of allergy in the pathophysiology of otitis media with effusion (OME) remains unclear. We evaluated the role of allergy and the Th1/Th2 balance in OME patients. METHOD Middle ear fluid was collected from 46 OME patients who had a ventilating tube inserted, and expression of GATA3, T-bet, IL-4, and IFN-gamma mRNA was assessed by RT-PCR. Expression of transcription factors and cytokines was compared in patients with and without allergy. RESULTS The levels of GATA3 and T-bet mRNA in effusion fluid correlated positively with the levels of IL-4 and IFN-gamma mRNA, respectively. However, the allergy and non-allergy groups showed no significant differences in expression of any of these transcription factors and cytokines. The T-bet:GATA3 ratio was higher in the non-allergy than in the allergy group, but the difference was not statistically significant. CONCLUSION Although we observed a significant positive correlation between GATA3 and IL-4 mRNA levels, we cannot conclude that OME with allergy is related to a Th-2 driven immune response.
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Chen SX, Huang FY, Tan GH, Wang CC, Huang YH, Wang H, Zhou SL, Chen F, Lin YY, Liu JB. RNA interference against interleukin-5 attenuates airway inflammation and hyperresponsiveness in an asthma model. J Zhejiang Univ Sci B 2009; 10:22-8. [PMID: 19198019 DOI: 10.1631/jzus.b0820226] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Interleukin-5 (IL-5) accompanies the development of airway inflammation and hyperresponsiveness through the activation of eosinophils. Therefore, interference of IL-5 expression in lung tissue seems to be an accepted approach in asthma therapy. In this study, we designed a small interfering RNA (siRNA) to inhibit the expression of IL-5. The siRNAs against IL-5 were constructed in a lentivirus expressing system, and 1.5x10(6) IFU (inclusion-forming unit) lentiviruses were administered intratracheally to ovalbumin (OVA)-sensitized murine asthmatic models. Our results show that lentivirus-delivered siRNA against IL-5 efficiently inhibited the IL-5 messenger ribonucleic acid (mRNA) expression and significantly attenuated the inflammation in lung tissue. Significant decrease of eosinophils and inflammatory cells were found in peripheral blood, bronchoalveolar lavage fluid (BALF), and lung tissue. In addition, significant inhibition of airway hyperresponsiveness (AHR) was found in the mice treated with siRNA against IL-5. These observations demonstrate that siRNA delivered by means of the lentivirus system is possibly an efficacious therapeutic approach for asthma.
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Walsh ER, Sahu N, Kearley J, Benjamin E, Kang BH, Humbles A, August A. Strain-specific requirement for eosinophils in the recruitment of T cells to the lung during the development of allergic asthma. ACTA ACUST UNITED AC 2008; 205:1285-92. [PMID: 18490489 PMCID: PMC2413027 DOI: 10.1084/jem.20071836] [Citation(s) in RCA: 117] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Eosinophils have been implicated as playing a major role in allergic airway responses. However, the importance of these cells to the development of this disease has remained ambiguous despite many studies, partly because of lack of appropriate model systems. In this study, using transgenic murine models, we more clearly delineate a role for eosinophils in asthma. We report that, in contrast to results obtained on a BALB/c background, eosinophil-deficient C57BL/6 ΔdblGATA mice (eosinophil-null mice via the ΔDblGATA1 mutation) have reduced airway hyperresponsiveness, and cytokine production of interleukin (IL)-4, -5, and -13 in ovalbumin-induced allergic airway inflammation. This was caused by reduced T cell recruitment into the lung, as these mouse lungs had reduced expression of CCL7/MCP-3, CC11/eotaxin-1, and CCL24/eotaxin-2. Transferring eosinophils into these eosinophil-deficient mice and, more importantly, delivery of CCL11/eotaxin-1 into the lung during the development of this disease rescued lung T cell infiltration and airway inflammation when delivered together with allergen. These studies indicate that on the C57BL/6 background, eosinophils are integral to the development of airway allergic responses by modulating chemokine and/or cytokine production in the lung, leading to T cell recruitment.
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Affiliation(s)
- Elizabeth Rose Walsh
- Center for Molecular Immunology and Infectious Disease and Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, PA 16802, USA
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Joubert P, Lajoie-Kadoch S, Welman M, Dragon S, Létuvée S, Tolloczko B, Halayko AJ, Gounni AS, Maghni K, Hamid Q. Expression and regulation of CCR1 by airway smooth muscle cells in asthma. THE JOURNAL OF IMMUNOLOGY 2008; 180:1268-75. [PMID: 18178867 DOI: 10.4049/jimmunol.180.2.1268] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
C-C chemokines such as CCL11, CCL5, and CCL3 are central mediators in the pathogenesis of asthma. They are mainly associated with the recruitment and the activation of specific inflammatory cells, such as eosinophils, lymphocytes, and neutrophils. It has recently been shown that they can also activate structural cells, such as airway smooth muscle and epithelial cells. The aims of this study were to examine the expression of the CCL3 receptor, CCR1, on human airway smooth muscle cells (ASMC) and to document the regulation of this receptor by cytokines involved in asthma pathogenesis. We first demonstrated that CCR1 mRNA is increased in the airways of asthmatic vs control subjects and showed for the first time that ASMC express CCR1 mRNA and protein, both in vitro and in vivo. Calcium mobilization by CCR1 ligands confirmed its functionality on ASMC. Stimulation of ASMC with TNF-alpha and, to a lesser extent, IFN-gamma resulted in an up-regulation of CCR1 expression, which was totally suppressed by both dexamethasone or mithramycin. Taken together, our data suggest that CCR1 might be involved in the pathogenesis of asthma, through the activation of ASMC by its ligands.
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Affiliation(s)
- Philippe Joubert
- Meakins-Christie Laboratories, McGill University, and Hôpital du Sacré-Coeur de Montréal, Research Center, Québec, Canada
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Tan GH, Su JM, Wang CC, Huang FY, Wang H, Huang YH, Lin YY. A recombinant DNA plasmid encoding the human interleukin-5 breaks immunological tolerance and inhibits airway inflammation in a murine model of asthma. Int Arch Allergy Immunol 2007; 145:313-23. [PMID: 18004073 DOI: 10.1159/000110890] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2007] [Accepted: 07/19/2007] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Eosinophils play a pivotal role in the generation of asthma inflammation. Interleukin (IL)-5 is the major activator of eosinophils. We hypothesize that modulating IL-5 activity could be an effective strategy for asthma therapy. In this study, we tested whether the plasmid encoding human IL-5 as a xenogeneic DNA vaccine could induce the production of autoantibodies, and be used for asthma treatment. METHODS A eukaryotic plasmid encoding the human IL-5 was constructed, and used as a DNA vaccine. A mouse model of asthma was established to observe its antiasthma activities. Eosinophils in tissue, blood and the bronchoalveolar lavage were stained and counted. Airway hyperresponsiveness (AHR) was determined by whole body plethysmography. Antibody characters and cytokines were detected with immunological methods. RESULTS Immunization with a plasmid encoding the human IL-5 as DNA vaccine reduced airway inflammation, reversed Th2 cytokines, and decreased AHR in mice. In addition, this immunization induced the production of polyclonal antibodies that were cross-reactive with native murine IL-5, and IgG1 and IgG2a were the major subclasses. Adoptive transfer of the purified antibodies from the sera of mice immunized with the plasmid encoding the human IL-5 resulted in similar antiasthma effects. CONCLUSIONS Our results suggest that active vaccination against IL-5 may be a rational therapeutic approach for the treatment of asthma and potentially other eosinophilic disorders.
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Affiliation(s)
- Guang-Hong Tan
- Hainan Provincial Key Laboratory of Tropical Medicine, Hainan Medical College, Haikou, China.
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Funaguchi N, Ohno Y, La BLB, Asai T, Yuhgetsu H, Sawada M, Takemura G, Minatoguchi S, Fujiwara T, Fujiwara H. Narirutin inhibits airway inflammation in an allergic mouse model. Clin Exp Pharmacol Physiol 2007; 34:766-70. [PMID: 17600554 DOI: 10.1111/j.1440-1681.2007.04636.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
1. Flavonoids are naturally occurring compounds that possess anti-allergic, anti-inflammatory, antiproliferative and anti-oxidant properties. In the present study, we investigated whether the flavonoid narirutin could reduce airway inflammation in ovalbumin (OVA)-sensitized/challenged NC/Nga mice, a model of allergic eosinophilic airway inflammation. 2. Mice were initially immunized intraperitoneally with OVA on Days 0 and 7 and then challenged with inhaled OVA on Days 14, 15 and 16. In addition, some mice received narirutin orally at doses of 0.1, 1 or 10 mg/kg bodyweight daily on Days 7-16. 3. At 10 mg/kg, but not 0.1 or 1 mg/kg, narirutin significantly diminished OVA-induced airway inflammation caused by infiltration of lung tissue with inflammatory and mucus-producing cells, as well as reduced eosinophil counts in the peripheral blood and bronchoalveolar lavage fluid (BALF), interleukin (IL)-4 levels in BALF and IgE levels in serum. 4. The mechanism of the anti-inflammatory effect of narirutin are likely to be associated with a reduction in the OVA-induced increases of IL-4 and IgE in a murine model of allergic eosinophilic airway inflammation. These findings suggest that narirutin may be an effective new tool in the treatment of bronchial asthma.
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Affiliation(s)
- Norihiko Funaguchi
- Second Department of Internal Medicine, Regeneration and Advanced Medical Science, Graduate School of Medicine, Gifu University, Gifu, Japan
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de Oliveira APL, Domingos HV, Cavriani G, Damazo AS, Dos Santos Franco AL, Oliani SM, Oliveira-Filho RM, Vargaftig BB, de Lima WT. Cellular recruitment and cytokine generation in a rat model of allergic lung inflammation are differentially modulated by progesterone and estradiol. Am J Physiol Cell Physiol 2007; 293:C1120-8. [PMID: 17634417 DOI: 10.1152/ajpcell.00286.2006] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We evaluated the role of estradiol and progesterone in allergic lung inflammation. Rats were ovariectomized (Ovx) and, 7 days later, were sensitized with ovalbumin (OA) and challenged after 2 wk with inhaled OA; experiments were performed 1 day thereafter. Ovx-allergic rats showed reduced cell recruitment into the bronchoalveolar lavage (BAL) fluid relative to sham-Ovx allergic rats, as was observed in intact allergic rats treated with ICI-182,780. Estradiol increased the number of cells in the BAL of Ovx-allergic rats, whereas progesterone induced an additional reduction. Cells of BAL and bone marrow (BM) of Ovx-allergic rats released elevated amounts of IL-10 and reduced IL-1beta and TNF-alpha. BM cells of Ovx-allergic rats released increased amounts of IL-10 and lower amounts of IL-4. Estradiol treatment of Ovx-allergic rats decreased the release of IL-10 but increased that of IL-4 by BM cells. Estradiol also caused an increased release of IL-1beta and TNF-alpha by BAL cells. Progesterone significantly increased the release of IL-10, IL-1beta, and TNF-alpha by BAL cells and augmented that of IL-4 by BM cells. Degranulation of bronchial mast cells from Ovx rats was reduced after in vitro challenge, an effect reverted by estradiol but not by progesterone. We suggest that the serum estradiol-to-progesterone ratio might drive cellular recruitment, modulating the pulmonary allergy and profile of release of anti-inflammatory or inflammatory cytokines. The existence of such dual hormonal effects suggests that the hormone therapy of asthmatic postmenopausal women and of those suffering of premenstrual asthma should take into account the possibility of worsening the pulmonary conditions.
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Affiliation(s)
- Ana Paula Ligeiro de Oliveira
- Av. Prof. Lineu Prestes, 1524, Lab. Fisiopatologia da Inflamação Experimental, Instituto de Ciências Biomédicas, Universidade de São Paulo, Departamento de Farmacologia, Cidade Universitária, São Paulo (SP05508-900, Brazil
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CD69 expression on airway eosinophils and airway inflammation in a murine model of asthma. Chin Med J (Engl) 2006. [DOI: 10.1097/00029330-200612010-00008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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Abstract
A systematic review of English and Korean articles published between 1990 and 2004 and a search of database and various online resources was conducted to determine the prevalences, mortality rates, socioeconomic burden, quality of life, and treatment pattern of asthma in Korean adults and children. Asthma morbidity and mortality in Korea are steadily increasing. The prevalence of asthma in Korea is estimated to be 3.9% and its severity is often underestimated by both physicians and patients. Mortality resulting from chronic lower respiratory diseases including asthma increased from 12.9 to 22.6 deaths per 100,000 of the population between 1992 and 2002. Disease severity, level of control, and symptom state were all found to negatively impact the quality of life of asthmatics. Although international and Korean asthma management guidelines are available, familiarity with and implementation of these guidelines by primary care physicians remain poor.
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Affiliation(s)
- Sang Heon Cho
- Department of Internal Medicine, Seoul National University College of Medicine, Chongno-gu, Seoul, Korea.
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Haczku A, Emami K, Fischer MC, Kadlecek S, Ishii M, Panettieri RA, Rizi RR. Hyperpolarized 3He MRI in asthma measurements of regional ventilation following allergic sensitization and challenge in mice--preliminary results. Acad Radiol 2005; 12:1362-70. [PMID: 16253848 DOI: 10.1016/j.acra.2005.08.027] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2005] [Revised: 08/16/2005] [Accepted: 08/16/2005] [Indexed: 10/25/2022]
Abstract
RATIONALE AND OBJECTIVES Quantitative regional measurement of physiological parameters of lung may improve both early detection of asthma and its response to treatment by elucidating the characteristics of airway obstruction. Recent emergence of hyperpolarized helium-3 magnetic resonance imaging as a sensitive pulmonary imaging tool has shown great potential in capturing important structural and functional aspects of normal and diseased lungs. The objective of this study was to investigate regional ventilation changes in the mouse lung following allergen sensitization and challenge. MATERIALS AND METHODS A murine model of allergic airway inflammation was created in mice following allergen challenge using Af and IgE-mediated asthma. The creation of model was verified using pulmonary function test and histology. Regional fractional ventilation was then measured in the animals using hyperpolarized 3He MRI on a pixel-by-pixel basis with a planar resolution of 0.24 mm. The sensitized and healthy animals were then compared statistically to assess the potential sensitivity of this technique in detection of such pulmonary abnormalities. RESULTS In this work, we have demonstrated for the first time the quantitative measurement of regional ventilation in normal and asthmatic mice. Results of this study show significant changes in regional ventilation in murine model of allergic airway sensitization compared with that in normal control animals. CONCLUSION Further development of this technique can potentially serve as a quantitative marker to investigate the physiology of allergen-induced airway hyperresponsiveness and to assist in disease treatment and prevention.
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Affiliation(s)
- Angela Haczku
- Pulmonary, Allergy and Critical Care Division, Department of Medicine, University of Pennsylvania, School of Medicine, Philadelphia, PA 19104-6100, USA.
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