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Li Y, Mu Z, Wang H, Liu J, Jiang F. The role of particulate matters on methylation of IFN-γ and IL-4 promoter genes in pediatric allergic rhinitis. Oncotarget 2018; 9:17406-17419. [PMID: 29707116 PMCID: PMC5915124 DOI: 10.18632/oncotarget.24227] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 12/27/2017] [Indexed: 01/23/2023] Open
Abstract
Allergic rhinitis (AR) is a chronic inflammatory disorder driven by T cell activation. How particulate matter contributes to epigenetic changes that in turn influence cytokine gene expression in CD4+T cells remains unclear. In this study, 105 children diagnosed with AR and 90 healthy controls were recruited to explore the possible mechanism of particulate matter (PM) on the epigenetic regulation of CD4+T IFN-γ and IL-4 promoter genes. Daily average PM10 and PM2.5 were obtained from five state-controlled monitoring stations, and activity-based dynamic exposure and personal exposure data were collected. DNA methylation patterns of IFN-γ and IL-4 promoter regions were analyzed using bisulfite sequencing. mRNA levels were detected by real-time quantitative reverse transcription polymerase chain reaction. We found that the methylation rate in IFN-γ was higher in AR CD4+T cells than in the controls. IFN-γ mRNA expression was significantly decreased in CD4+T cells, and negatively correlated with the mean methylation level of IFN-γ. However, no correlation between IL-4 methylation and IL-4 mRNA expression was found. After adjusting for age, gender, exclusive breastfeeding within 4 months after birth and parental history of allergic disease, out data showed that PM2.5 exposure level was positively correlated with methylation level in IFN-γ promoter region and decreased cytokine expression. We conclude that the effect of PM2.5 on pediatric AR may be mediated through epigenetic modification of IFN-γ promoter region.
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Affiliation(s)
- Youjin Li
- Department of Otorhinolaryngology-Head and Neck Surgery, Children's Medical Center, Shanghai Jiaotong University, Shanghai 200127, China
| | - Zhe Mu
- School of Public Health, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.,Shanghai Key Laboratory of Meteorology and Health, Shanghai Meteorological Bureau, Shanghai 200030, China
| | - Hongyang Wang
- Chinese PLA Institute of Otolaryngology, Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing 100853, China
| | - Jinfen Liu
- Department of Pediatrics, Children's Medical Center, Shanghai Jiaotong University, Shanghai Jiaotong University Pediatric Institute, Shanghai 200127, China
| | - Fan Jiang
- Department of Child Development and Behavior, Children's Medical Center, Shanghai Jiaotong University, Shanghai 200127, China.,MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai 200127, China
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Eriksson J, Ekerljung L, Bossios A, Bjerg A, Wennergren G, Rönmark E, Torén K, Lötvall J, Lundbäck B. Aspirin-intolerant asthma in the population: prevalence and important determinants. Clin Exp Allergy 2015; 45:211-9. [PMID: 24961377 DOI: 10.1111/cea.12359] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 05/04/2014] [Accepted: 05/26/2014] [Indexed: 01/24/2023]
Abstract
BACKGROUND Population-based studies on aspirin-intolerant asthma (AIA) are very few, and no previous population study has investigated risk factors for the condition. OBJECTIVE To investigate the prevalence and risk factors of AIA in the general population. METHODS A questionnaire on respiratory health was mailed to 30,000 randomly selected subjects aged 16-75 years in West Sweden, 29,218 could be traced and 18,087 (62%) responded. The questionnaire included questions on asthma, respiratory symptoms, aspirin-induced dyspnoea and possible determinants. RESULTS The prevalence of AIA was 0.5%, 0.3% in men and 0.6% in women (P = 0.014). Sick leave, emergency visits due to asthma and all investigated lower respiratory symptoms were more common in AIA than in aspirin-tolerant asthma (ATA). Obesity was a strong risk factor for AIA (BMI > 35: odds ratio (OR) 12.1; 95% CI 2.49-58.5), and there was a dose-response relationship between increasing body mass index (BMI) and risk of AIA. Obesity, airborne occupational exposure and visible mould at home were considerably stronger risk factors for AIA than for ATA. Current smoking was a risk factor for AIA (OR 2.55; 95% CI 1.47-4.42), but not ATA. CONCLUSION Aspirin-intolerant asthma identified in the general population was associated with a high burden of symptoms, uncontrolled disease and a high morbidity. Increasing BMI increased the risk of AIA in a dose-response manner. A number of risk factors, including obesity and current smoking, were considerably stronger for AIA than for ATA.
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Affiliation(s)
- J Eriksson
- Department of Internal Medicine and Clinical Nutrition, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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Bocquier A, El-Haïk Y, Jardin M, Cortaredona S, Nauleau S, Verger P. [Relevance of the health insurance databases to study spatial disparities in asthma prevalence: A study in southeastern France]. Rev Epidemiol Sante Publique 2015; 63:155-62. [PMID: 25975778 DOI: 10.1016/j.respe.2015.03.122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 12/19/2014] [Accepted: 03/23/2015] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Data on asthma prevalence at a small-area level would be useful to set up and monitor French local public health policies. This study, based on drug reimbursement databases in southeastern France, aimed to (1) compare asthma-like disorders prevalence estimated by using three different indicators; (2) study sociodemographic characteristics associated with these indicators; (3) verify whether these indicators are equivalent to study geographical disparities of the asthma-like disorders prevalence at a small-area level. METHODS The study was conducted among the beneficiaries of the National Health Insurance Fund aged 18-44 years residing in southeastern France in 2010 (n=1,371,816). Using data on asthma drugs reimbursements (therapeutic class R03), we built three indicators to assess asthma-like disorders prevalence: at least 1, 2 or 3 purchase(s) in 2010. We analyzed sociodemographic characteristics associated with these indicators, and their geographical disparities at a small-area level using multilevel logistic regression models. RESULTS The crude asthma-like disorders prevalence varied between 2.6 % and 8.4 % depending on the indicator. It increased with age, was higher for women than for men, and among low-income people for all three indicators. We measured significant geographical disparities. Areas with high prevalence rates were the same regardless of the indicator. CONCLUSION The indicators built in this study can be useful to identify high prevalence areas. They could contribute to launch discussion on environmental health issues at the local level.
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Affiliation(s)
- A Bocquier
- Observatoire régional de la santé Provence-Alpes-Côte d'Azur (ORS PACA), 23, rue Stanislas-Torrents, 13006 Marseille, France; Inserm, UMR912 (SESSTIM), 13006 Marseille, France; UMR_S912, IRD, Aix-Marseille université, 13006 Marseille, France.
| | - Y El-Haïk
- Observatoire régional de la santé Provence-Alpes-Côte d'Azur (ORS PACA), 23, rue Stanislas-Torrents, 13006 Marseille, France; Service pharmacie, CHU Timone, AP-HM, 13385 Marseille, France
| | - M Jardin
- Observatoire régional de la santé Provence-Alpes-Côte d'Azur (ORS PACA), 23, rue Stanislas-Torrents, 13006 Marseille, France; Inserm, UMR912 (SESSTIM), 13006 Marseille, France; UMR_S912, IRD, Aix-Marseille université, 13006 Marseille, France
| | - S Cortaredona
- Observatoire régional de la santé Provence-Alpes-Côte d'Azur (ORS PACA), 23, rue Stanislas-Torrents, 13006 Marseille, France; Inserm, UMR912 (SESSTIM), 13006 Marseille, France; UMR_S912, IRD, Aix-Marseille université, 13006 Marseille, France
| | - S Nauleau
- Département observation et études, Agence régionale de santé Provence-Alpes-Côte d'Azur, 13331 Marseille, France
| | - P Verger
- Observatoire régional de la santé Provence-Alpes-Côte d'Azur (ORS PACA), 23, rue Stanislas-Torrents, 13006 Marseille, France; Inserm, UMR912 (SESSTIM), 13006 Marseille, France; UMR_S912, IRD, Aix-Marseille université, 13006 Marseille, France
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Sibilano R, Pucillo CE, Gri G. Allergic responses and aryl hydrocarbon receptor novel pathway of mast cell activation. Mol Immunol 2014; 63:69-73. [PMID: 24656327 DOI: 10.1016/j.molimm.2014.02.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 02/20/2014] [Accepted: 02/25/2014] [Indexed: 12/21/2022]
Abstract
The activation of the transcription factor aryl hydrocarbon receptor (AhR) is modulated by a wide variety of xenobiotics and ligands deriving from products of metabolism. The study of the contribution of AhR to allergic diseases has gained much interest in recent years. Here we discuss the role that environmental factors and metabolic products, particularly acting on AhR-expressing mast cells (MCs), could have in the development of local allergic/atopic response. Thus, this review will cover: a brief overview of the AhR mechanism of action in the immune system; a description of different AhR ligands and their effects to IgE-mediated MC activation in the allergic response, with particular attention to the role of IL-17; a discussion about the potential involvement of AhR in immune tolerance; and a conclusion on human diseases in which direct AhR activation of MC might have a major impact.
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Affiliation(s)
- Riccardo Sibilano
- Department of Pathology, CCSR 3255, 269 Campus Drive, Stanford, CA 94305, USA
| | - Carlo E Pucillo
- Department of Medical and Biological Sciences, University of Udine, P.le M. Kolbe 4, 33100 Udine, Italy
| | - Giorgia Gri
- Department of Medical and Biological Sciences, Section of Surgical Pathology, University of Udine, P.le S. Maria della Misericordia 15, 33100 Udine, Italy.
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Ogawa H, Fujimura M, Ohkura N, Satoh K, Makimura K. Fungus-associated asthma: overcoming challenges in diagnosis and treatment. Expert Rev Clin Immunol 2014; 10:647-56. [PMID: 24580109 DOI: 10.1586/1744666x.2014.892829] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
With regard to fungal colonization and fungal sensitization, the goals of fungus-associated asthma management are as follows: 1) to survey fungi colonizing the airways of patients repeatedly; 2) to evaluate the tendency of the colonizing fungi to sensitize patients and the influence on clinical manifestations of asthma; 3) to follow disease development to allergic bronchopulmonary mycosis or sinobronchial allergic mycosis; and 4) to determine whether fungal eradication from the airway of patients is beneficial from the viewpoints of future risk factors. Recent developments in molecular biological analyses have facilitated the identification of basidiomycetous fungi that were not previously thought to be of concern in fungal allergy. The total control of fungus-associated asthma will be accomplished by environmental management established from the viewpoint of both the ecology and life cycle of the responsible fungi.
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Affiliation(s)
- Haruhiko Ogawa
- Division of Pulmonary Medicine, Ishikawa-ken Saiseikai Kanazawa Hospital, Kanazawa 920-0353, Japan
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Possible molecular mechanisms linking air pollution and asthma in children. BMC Pulm Med 2014; 14:31. [PMID: 24581224 PMCID: PMC3941253 DOI: 10.1186/1471-2466-14-31] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Accepted: 02/03/2014] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Air pollution has many effects on the health of both adults and children, but children's vulnerability is unique. The aim of this review is to discuss the possible molecular mechanisms linking air pollution and asthma in children, also taking into account their genetic and epigenetic characteristics. RESULTS Air pollutants appear able to induce airway inflammation and increase asthma morbidity in children. A better definition of mechanisms related to pollution-induced airway inflammation in asthmatic children is needed in order to find new clinical and therapeutic strategies for preventing the exacerbation of asthma. Moreover, reducing pollution-induced oxidative stress and consequent lung injury could decrease children's susceptibility to air pollution. This would be extremely useful not only for the asthmatic children who seem to have a genetic susceptibility to oxidative stress, but also for the healthy population. In addition, epigenetics seems to have a role in the lung damage induced by air pollution. Finally, a number of epidemiological studies have demonstrated that exposure to common air pollutants plays a role in the susceptibility to, and severity of respiratory infections. CONCLUSIONS Air pollution has many negative effects on pediatric health and it is recognised as a serious health hazard. There seems to be an association of air pollution with an increased risk of asthma exacerbations and acute respiratory infections. However, further studies are needed in order to clarify the specific mechanism of action of different air pollutants, identify genetic polymorphisms that modify airway responses to pollution, and investigate the effectiveness of new preventive and/or therapeutic approaches for subjects with low antioxidant enzyme levels. Moreover, as that epigenetic changes are inheritable during cell division and may be transmitted to subsequent generations, it is very important to clarify the role of epigenetics in the relationship between air pollution and lung disease in asthmatic and healthy children.
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Kim MK. Occupational asthma induced by beat-galactosidase. ALLERGY ASTHMA & RESPIRATORY DISEASE 2014. [DOI: 10.4168/aard.2014.2.1.75] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Mi-Kyeong Kim
- Department of Internal Medicine, Medical Research Institute, Chungbuk National University College of Medicine, Cheongju, Korea
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Abstract
The present review addresses recent advances and especially challenging aspects regarding the role of environmental risk factors in adult-onset asthma, for which the causes are poorly established. In the first part of the review, we discuss aspects regarding some environmental risk factors for adult-onset asthma: air pollution, occupational exposures with a focus on an emerging risk represented by exposure to cleaning agents (both at home and in the workplace), and lifestyle and nutrition. The second part is focused on perspectives and challenges, regarding relevant topics on which research is needed to improve the understanding of the role of environmental factors in asthma. Aspects of exposure assessment, the complexity of multiple exposures, the interrelationships of the environment with behavioral characteristics and the importance of studying biological markers and gene-environment interactions to identify the role of the environment in asthma are discussed. We conclude that environmental and lifestyle exposures play an important role in asthma or related phenotypes. The changes in lifestyle and the environment in recent decades have modified the specific risk factors in asthma even for well-recognized risks such as occupational exposures. To better understand the role of the environment in asthma, the use of objective (quantitative measurement of exposures) or modern tools (bar code, GPS) and the development of multidisciplinary collaboration would be very promising. A better understanding of the complex interrelationships between socio-economic, nutritional, lifestyle and environmental conditions might help to study their joint and independent roles in asthma.
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Ogawa H, Fujimura M, Satoh K, Makimura K. Re: Integrated research on the association between climate change and Bjerkandera allergy. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2013; 1:543. [PMID: 24565636 DOI: 10.1016/j.jaip.2013.05.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 03/19/2013] [Accepted: 05/29/2013] [Indexed: 10/26/2022]
Affiliation(s)
- Haruhiko Ogawa
- Division of Pulmonary Medicine, Ishikawa-ken Saiseikai Kanazawa Hospital, Kanazawa, Japan.
| | - Masaki Fujimura
- Respiratory Medicine, National Hospital Organization Nanao Hospital, Nanao, Japan
| | - Kazuo Satoh
- Laboratory of Space and Environmental Medicine, Graduate School of Medicine and Graduate School of Medical Technology, Teikyo University, Itabashi-ku, Tokyo, Japan
| | - Koichi Makimura
- Department of Molecular Biology and Gene Diagnosis, Institute of Medical Mycology and Genome Research Center, Graduate School of Medical Science, Teikyo University, Hachioji, Japan
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