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Wang W, An G, Li Y, Corrigan CJ, Wang W, Ying S, Huang K. Similarities and differences in the effects of sensitisation and challenge with Dermatophagoides farinae and Dermatophagoides pteronyssinus extracts in a murine asthma surrogate. Cell Immunol 2020; 348:104038. [PMID: 31952799 DOI: 10.1016/j.cellimm.2020.104038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 12/18/2019] [Accepted: 01/06/2020] [Indexed: 12/24/2022]
Abstract
Patients with atopic asthma may become sensitised to the grain storage mite Dermatophagoides farinae (Der f), the house dust mite Dermatophagoides pteronyssinus (Der p) or both, but thus far little attention has been paid to date to possible variation in their pathophysiological effects. Here we present a side by side comparison of the effects of extracts of these two dust mites in a murine surrogate of atopic asthma. Compared with the Der p-challenged mice, however, the mice-challenged with Der f had favour changes in lung tissue elasticity and expression in matrix metalloproteinases in lung tissue, while the mice challenged with Der p showed more neutrophils infiltrating around the airway and stronger expression of steroid-resistant related cytokines in the lung tissue. Our data suggest that different dust mite crude extracts might lead different pathological characteristics, at least in murine models of asthma.
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Affiliation(s)
- Wenjun Wang
- Department of Respiratory and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University & Beijing Institute of Respiratory Medicine, Beijing, China
| | - Gao An
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Yan Li
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Chris J Corrigan
- Faculty of Life Sciences & Medicine, School of Immunology & Microbial Sciences, Asthma UK Centre in Allergic Mechanisms of Asthma, King's College London, London, UK
| | - Wei Wang
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Sun Ying
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China.
| | - Kewu Huang
- Department of Respiratory and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University & Beijing Institute of Respiratory Medicine, Beijing, China.
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Wu CC, Hsu TY, Chang JC, Ou CY, Kuo HC, Liu CA, Wang CL, Chuang H, Chen CP, Yang KD. Paternal Tobacco Smoke Correlated to Offspring Asthma and Prenatal Epigenetic Programming. Front Genet 2019; 10:471. [PMID: 31214241 PMCID: PMC6554446 DOI: 10.3389/fgene.2019.00471] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 05/01/2019] [Indexed: 12/15/2022] Open
Abstract
Rationale: Little is known about effects of paternal tobacco smoke (PTS) on the offspring's asthma and its prenatal epigenetic programming. Objective: To investigate whether PTS exposure was associated with the offspring's asthma and correlated to epigenetic CG methylation of potential tobacco-related immune genes: LMO2, GSTM1 or/and IL-10 genes. Measurements and Main Results: In a birth cohort of 1,629 newborns, we measured exposure rates of PTS (23%) and maternal tobacco smoke (MTS, 0.2%), cord blood DNA methylation, infant respiratory tract infection, childhood DNA methylation, and childhood allergic diseases. Infants with prenatal PTS exposure had a significantly higher risk of asthma by the age of 6 than those without (p = 0.026). The PTS exposure doses at 0, <20, and ≧20 cigarettes per day were significantly associated with the trend of childhood asthma and the increase of LMO2-E148 (p = 0.006), and IL10_P325 (p = 0.008) CG methylation. The combination of higher CG methylation levels of LMO2_E148, IL10_P325, and GSTM1_P266 corresponded to the highest risk of asthma by 43.48%, compared to other combinations (16.67-23.08%) in the 3-way multi-factor dimensionality reduction (MDR) analysis. The LMO2_P794 and GSTM1_P266 CG methylation levels at age 0 were significantly correlated to those at age of 6. Conclusions: Prenatal PTS exposure increases CG methylation contents of immune genes, such as LMO2 and IL-10, which significantly retained from newborn stage to 6 years of age and correlated to development of childhood asthma. Modulation of the LMO2 and IL-10 CG methylation and/or their gene expression may provide a regimen for early prevention of PTS-associated childhood asthma. Descriptor number: 1.10 Asthma Mediators. Scientific Knowledge on the Subject: It has been better known that maternal tobacco smoke (MTS) has an impact on the offspring's asthma via epigenetic modification. Little is known about effects of paternal tobacco smoke (PTS) on the offspring's asthma and its prenatal epigenetic programming. What This Study Adds to the Field: Prenatal tobacco smoke (PTS) can program epigenetic modifications in certain genes, such as LMO2 and IL-10, and that these modifications are correlated to childhood asthma development. The higher the PTS exposure dose the higher the CG methylation levels are found. The combination of higher CG methylation levels of LMO2_E148, IL10_P325 and GSTM1_P266 corresponded to the highest risk of asthma. Measuring the DNA methylation levels of certain genes might help to predict high-risk populations for childhood asthma and provide a potential target to prevent the development of childhood asthma.
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Affiliation(s)
- Chih-Chiang Wu
- Department of Pediatrics, Po-Zen Hospital, Kaohsiung, Taiwan.,Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Te-Yao Hsu
- Department of Obstetrics and Gynecology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Jen-Chieh Chang
- Genomic and Proteomic Core Laboratory, Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Chia-Yu Ou
- Department of Obstetrics, Po-Zen Hospital, Kaohsiung, Taiwan
| | - Ho-Chang Kuo
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Chieh-An Liu
- Department of Pediatrics, Po-Zen Hospital, Kaohsiung, Taiwan
| | - Chih-Lu Wang
- Department of Pediatrics, Po-Zen Hospital, Kaohsiung, Taiwan
| | - Hau Chuang
- Genomic and Proteomic Core Laboratory, Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Chie-Pein Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan
| | - Kuender D Yang
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Pediatrics, Mackay Memorial Hospital, Taipei, Taiwan.,Institute of Biomedical Sciences, Mackay Medical College, New Taipei City, Taiwan.,Institute of Microbiology and Immunology, National Defense Medical Center, Taipei, Taiwan
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Sherenian MG, Singh AM, Arguelles L, Balmert L, Caruso D, Wang X, Pongracic J, Kumar R. Association of food allergy and decreased lung function in children and young adults with asthma. Ann Allergy Asthma Immunol 2018; 121:588-593.e1. [PMID: 30081088 PMCID: PMC6215513 DOI: 10.1016/j.anai.2018.07.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 07/27/2018] [Accepted: 07/30/2018] [Indexed: 11/20/2022]
Abstract
BACKGROUND Food allergy (FA) appears early in the atopic march, a progression that may lead to the development of asthma. The association between FA and pulmonary function in children with and without asthma remains unknown. OBJECTIVE To investigate the association between FA and lung function in children with and without asthma. METHODS We enrolled 1,068 children as a part of a family-based FA cohort. We then categorized children as having FA by physician diagnosis, evidence of specific IgE, and typical symptoms within 2 hours of food ingestion. We categorized asthma by physician diagnosis. We used American Thoracic Society criteria for spirometry measurements. We assessed the effects of asthma classification and FA number on lung function using mixed-effect models. RESULTS We enrolled 1,068 children: 417 (39%) had asthma, 402 (38%) had at least 1 FA, and 162 (15%) had 2 or more FAs. Unstratified analyses found no significant association between FA number and lung function. In children with asthma, we detected statistically significant differences in predicted forced expiratory flow at 25% to 75% between children with 2 or more FAs compared with those with none (mean [SE] β = -7.5 [3.6]; P = .04). This effect lost significance after adjusting for aeroallergen sensitization. We detected no significant associations between FA number and predicted forced expiratory volume in 1 second, forced vital capacity, and ratio of forced expiratory volume in 1 second to forced vital capacity. CONCLUSION Having 2 or more FAs is a potential risk factor for greater small airway airflow obstruction among children with asthma, highlighting the need for close clinical follow-up and improved intervention strategies for these patients.
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Affiliation(s)
- Michael G Sherenian
- Department of Pediatrics, Northwestern Feinberg School of Medicine, Chicago, Illinois; Division of Allergy/Immunology, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois.
| | - Anne M Singh
- Department of Pediatrics, Northwestern Feinberg School of Medicine, Chicago, Illinois; Division of Allergy/Immunology, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois; Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Lester Arguelles
- Department of Pediatrics, Northwestern Feinberg School of Medicine, Chicago, Illinois
| | - Lauren Balmert
- Department of Preventative Medicine/Biostatistics, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Deanna Caruso
- Department of Pediatrics, Northwestern Feinberg School of Medicine, Chicago, Illinois; Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Xiaobin Wang
- Department of Pediatrics, Northwestern Feinberg School of Medicine, Chicago, Illinois; Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Jacqueline Pongracic
- Department of Pediatrics, Northwestern Feinberg School of Medicine, Chicago, Illinois; Division of Allergy/Immunology, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois
| | - Rajesh Kumar
- Department of Pediatrics, Northwestern Feinberg School of Medicine, Chicago, Illinois; Division of Allergy/Immunology, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois
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Moghtaderi M, Farjadian S, Abbaszadeh Hasiri M. Animal allergen sensitization in veterinarians and laboratory animal workers. Occup Med (Lond) 2014; 64:516-20. [PMID: 25104279 DOI: 10.1093/occmed/kqu097] [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] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Animals secrete allergens into the environment and exposure to these in the workplace may cause sensitization. AIMS To identify the frequency of animal allergen sensitization and symptoms in animal workers. METHODS Using skin prick tests (SPT), we assessed sensitization to 15 mammal and bird allergens in animal workers and controls. We also recorded symptoms and pulmonary function tests. RESULTS There were 100 animal workers and 50 controls included in the study. Thirty-six per cent of animal workers and 10% of controls had positive SPT (P < 0.001, odds ratio [OR] = 5.1, 95% CI 1.7-16.0). The most common sensitizations were to horse (16% in animal workers versus 0% in controls, P < 0.01), canary (16% in animal workers versus 2% in controls, P < 0.05, OR = 9.3, 95% CI 1.2-194), cattle (13% in animal workers versus 0% in controls, P < 0.05), cat (12% in animal workers versus 6% in controls, not significant), rabbit and hamster (10% each in animal workers versus 0% in controls, P < 0.05). Allergy symptoms were reported by 52 animal workers, but only 36 of them had positive SPT. Twelve animal workers had abnormal pulmonary function tests and six had positive SPT. CONCLUSIONS Animal workers are at high risk of occupational sensitization to animal allergens. Exposure should be minimized through control measures and worker education about the risks of exposure and sensitization.
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Affiliation(s)
- M Moghtaderi
- Allergy Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - S Farjadian
- Allergy Research Center, Shiraz University of Medical Sciences, Shiraz, Iran, Department of Immunology, Shiraz University of Medical Sciences, Shiraz, Iran,
| | - M Abbaszadeh Hasiri
- Department of Clinical Sciences, Veterinary School, Shiraz University, Shiraz, Iran
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Kearney GD, Johnson LC, Xu X, Balanay JAG, Lamm KM, Allen DL. Eastern Carolina Asthma Prevention Program (ECAPP): An Environmental Intervention Study Among Rural and Underserved Children with Asthma in Eastern North Carolina. ENVIRONMENTAL HEALTH INSIGHTS 2014; 8:27-37. [PMID: 25057240 PMCID: PMC4077872 DOI: 10.4137/ehi.s16430] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Revised: 05/29/2014] [Accepted: 05/29/2014] [Indexed: 06/03/2023]
Abstract
OBJECTIVE Asthma is the most common chronic childhood condition affecting 6.3 million (US) children aged less than 18 years. Home-based, multi-component, environmental intervention studies among children with asthma have demonstrated to be effective in reducing asthma symptoms. In this study, a local hospital and university developed an environmental intervention research pilot project, Eastern Carolina Asthma Prevention Program (ECAPP), to evaluate self-reported asthma symptoms, breathing measurements, and number of asthma-related emergency department (ED) visits among low-income, minority children with asthma living in rural, eastern North Carolina. Our goal was to develop a conceptual model and demonstrate any asthma respiratory improvements in children associated with our home-based, environmental intervention. METHODS This project used a single cohort, intervention design approach to compare self-reported asthma-related symptoms, breathing tests, and ED visits over a 6 month period between children with asthma in an intervention study group (n = 12) and children with asthma in a control study group (n = 7). The intervention study group received intense asthma education, three home visits, 2 week follow-up telephone calls, and environmental intervention products for reducing asthma triggers in the home. The control group received education at baseline and 2 week calls, but no intervention products. RESULTS At the end of the study period, significant improvements were observed in the intervention group compared with the control group. Overall, the intervention group experienced a 58% (46 ± SD 26.9) reduction in self-reported asthma symptoms; 76% (34 ± SD 29.7) decrease in rescue medicine; 12% (145 ± SD 11.3) increase in controller medicine; 37% decrease in mean exhaled nitric oxide levels and 33% fewer ED asthma-related visits. CONCLUSION As demonstrated, a combination of efforts appeared effective for improving asthma respiratory symptoms among children in the intervention group. ECAPP is a low cost pilot project that could readily be adapted and expanded into other communities throughout eastern North Carolina. Future efforts could include enhanced partnerships between environmental health professionals at local health departments and pediatric asthma programs at hospitals to carry out ECAPP.
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Affiliation(s)
- Gregory D Kearney
- Assistant Professor, Department of Public Health, Brody School of Medicine, East Carolina University, Greenville, NC, USA
| | - Lisa C Johnson
- Pediatric Asthma Coordinator, Vidant Medical Center, Pediatric Asthma Program, Greenville, NC, USA
| | - Xiaohui Xu
- Assistant Professor, Department of Epidemiology, College of Public Health and Health Professions, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Jo Anne G Balanay
- Assistant Professor, Department of Health Education and Promotion, College of Health and Human Performance, Environmental Health Sciences Program, East Carolina University, Greenville, NC, USA
| | - Kevin M Lamm
- Research Associate, Department of Public Health, Brody School of Medicine, East Carolina University, Greenville, NC, USA
| | - Daniel L Allen
- Research Associate, Department of Public Health, Brody School of Medicine, East Carolina University, Greenville, NC, USA
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Aryan Z, Compalati E, Comapalati E, Canonica GW, Rezaei N. Allergen-specific immunotherapy in asthmatic children: from the basis to clinical applications. Expert Rev Vaccines 2013; 12:639-59. [PMID: 23750794 DOI: 10.1586/erv.13.45] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Atopic asthma in childhood with the tendency to persist into adult life is an important issue in pediatrics. Allergen-specific immunotherapy (SIT) is the only curative treatment option for these children, being directed to the causes of the disease. The Th2 phenotype is a predominant immunological pattern in atopic asthma and SIT leads to apoptosis/anergy of T cells and induces immune-regulatory responses and immune deviation towards Th1. Many factors can affect the safety and efficacy of SIT, such as pattern of sensitization, allergy vaccine (allergen extracts, adjuvants and conjugated molecules), route of administration (subcutaneous or sublingual) and different treatment schedules. Overall, asthma symptoms and medication scores usually decrease following a SIT course and the most common observed side effects are restricted to local swelling, erythema and pruritus. Compared with conventional pharmacotherapy, SIT may be more cost effective, providing a benefit after discontinuation and a steroid-sparing effect. In addition, it can prevent new sensitizations in monosensitized asthmatic children. Microbial supplements such as probiotics, immunomodulatory substances like anti-IgE/leukotrienes, antibodies and newer allergen preparations such as recombinant forms have been tested to improve the efficacy and safety of SIT with inconclusive results. In conclusion, SIT provides an appropriate solution for childhood asthma that should be employed more often in clinical practice. Further studies are awaited to improve current knowledge regarding the mechanisms behind SIT and determine the most appropriate materials and schedule of immunotherapy for children with asthma.
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Affiliation(s)
- Zahra Aryan
- Molecular Immunology Research Center, Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Different anti-apoptotic effects of normal and asthmatic serum on normal eosinophil apoptosis depending on house dust mite-specific IgE. Mol Biol Rep 2013; 40:5875-81. [PMID: 24065529 DOI: 10.1007/s11033-013-2695-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Accepted: 09/14/2013] [Indexed: 01/10/2023]
Abstract
We investigated the effect of asthmatic serum on constitutive eosinophil apoptosis in normal subjects. Eosinophil apoptosis in normal subjects was inhibited by asthmatic serum but not normal serum. In a detailed analysis based on the presence of house dust mite (HDM) IgE, HDM IgE-positive (+) asthmatic serum was more effective for eosinophil apoptosis than that of HDM IgE-negative (-) asthmatic serum. HDM IgE+ asthmatic serum inhibited both HDM IgE- and HDM IgE+ normal eosinophil apoptosis, and HDM IgE- asthmatic serum suppressed eosinophil apoptosis of HDM IgE+ normal. HDM IgE- normal serum did not inhibit either HDM IgE- or HDM IgE+ normal eosinophil apoptosis, and HDM IgE+ normal serum inhibited HDM IgE+ normal eosinophil apoptosis. The kind of HDM IgE (Dermatophagoides pteronissinus-specific IgE and Dermatophagoides farinae-specific IgE) was not related to the effect of asthmatic serum on eosinophil apoptosis. Extracts of DP and DF, Der p1, and Der p2, were not effective for eosinophil apoptosis. HDM IgE+ asthmatic serum inhibited cleavage of procaspase 9 and procaspase 3. Asthmatic serum induced Akt and ERK phosphorylation, and ERK activation was suppressed by AKTi. Taken together, asthmatic serum inhibited normal eosinophil apoptosis via PI3K/Akt/ERK cascade. The novel approach taken in this study provided better insight into HDM-associated anti-apoptotic mechanism of eosinophils in patients with asthma.
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Fabian MP, Stout NK, Adamkiewicz G, Geggel A, Ren C, Sandel M, Levy JI. The effects of indoor environmental exposures on pediatric asthma: a discrete event simulation model. Environ Health 2012; 11:66. [PMID: 22989068 PMCID: PMC3527278 DOI: 10.1186/1476-069x-11-66] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Accepted: 09/06/2012] [Indexed: 05/19/2023]
Abstract
BACKGROUND In the United States, asthma is the most common chronic disease of childhood across all socioeconomic classes and is the most frequent cause of hospitalization among children. Asthma exacerbations have been associated with exposure to residential indoor environmental stressors such as allergens and air pollutants as well as numerous additional factors. Simulation modeling is a valuable tool that can be used to evaluate interventions for complex multifactorial diseases such as asthma but in spite of its flexibility and applicability, modeling applications in either environmental exposures or asthma have been limited to date. METHODS We designed a discrete event simulation model to study the effect of environmental factors on asthma exacerbations in school-age children living in low-income multi-family housing. Model outcomes include asthma symptoms, medication use, hospitalizations, and emergency room visits. Environmental factors were linked to percent predicted forced expiratory volume in 1 second (FEV1%), which in turn was linked to risk equations for each outcome. Exposures affecting FEV1% included indoor and outdoor sources of NO2 and PM2.5, cockroach allergen, and dampness as a proxy for mold. RESULTS Model design parameters and equations are described in detail. We evaluated the model by simulating 50,000 children over 10 years and showed that pollutant concentrations and health outcome rates are comparable to values reported in the literature. In an application example, we simulated what would happen if the kitchen and bathroom exhaust fans were improved for the entire cohort, and showed reductions in pollutant concentrations and healthcare utilization rates. CONCLUSIONS We describe the design and evaluation of a discrete event simulation model of pediatric asthma for children living in low-income multi-family housing. Our model simulates the effect of environmental factors (combustion pollutants and allergens), medication compliance, seasonality, and medical history on asthma outcomes (symptom-days, medication use, hospitalizations, and emergency room visits). The model can be used to evaluate building interventions and green building construction practices on pollutant concentrations, energy savings, and asthma healthcare utilization costs, and demonstrates the value of a simulation approach for studying complex diseases such as asthma.
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Affiliation(s)
- M Patricia Fabian
- Department of Environmental Health, Boston University School of Public Health, Boston, MA, USA
- Department of Environmental Health, Harvard School of Public Health, Boston, MA, USA
| | - Natasha K Stout
- Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA, USA
| | - Gary Adamkiewicz
- Department of Environmental Health, Harvard School of Public Health, Boston, MA, USA
| | - Amelia Geggel
- Department of Environmental Health, Harvard School of Public Health, Boston, MA, USA
| | - Cizao Ren
- Department of Environmental Health, Harvard School of Public Health, Boston, MA, USA
| | - Megan Sandel
- Department of General Pediatrics, Boston Medical University School of Medicine, Boston, MA, USA
| | - Jonathan I Levy
- Department of Environmental Health, Boston University School of Public Health, Boston, MA, USA
- Department of Environmental Health, Harvard School of Public Health, Boston, MA, USA
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Albano PM, Ramos JDA. Association of house dust mite-specific IgE with asthma control, medications and household pets. Asia Pac Allergy 2011; 1:145-51. [PMID: 22053311 PMCID: PMC3206243 DOI: 10.5415/apallergy.2011.1.3.145] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Accepted: 08/09/2011] [Indexed: 11/28/2022] Open
Abstract
Background Evidence is conflicting regarding the effectiveness of creating a low-allergen environment or reducing allergen exposure to control asthma exacerbations. Objective This study determined the association of house dust mite (HDM)-specific IgE levels with asthma symptom control, selected medications, family history of allergic disease, and exposure to second-hand smoke and household pets. Methods Serum samples from 102 doctor-diagnosed allergic asthma patients and 100 non-atopic controls were subjected to enzyme-linked immunosorbent assay using the HDM species Dermatophagoides pteronyssinus (Dp), Dermatophagoides farinae (Df), and Blomia tropicalis (Bt) allergens. Point-biserial correlation coefficient, Pearson R correlation, and logistic regression analyses were used to determine association of HDM-specific IgE levels with the abovementioned variables. Results Of the 102 cases, 38.24%, 47.06%, and 33.33% were sensitized to Bt, Df, and Dp, respectively. Sensitized patients showed greater probability [Bt (OR = 1.21), Df (OR = 1.14), and Dp (OR = 1.35)] to manifest symptoms than those who were not. Obtained p-values [Bt (p = 0.73), Df (p = 0.83), and Dp (p = 0.59)], however, proved that HDM-specific IgE levels had no significant contribution in predicting or explaining occurrence of asthma symptoms. Bt- and Df-specific IgEs showed moderately weak but significant relationship with bambuterol HCl and expectorant, respectively. Patients currently on said medications registered higher HDM-specific IgE levels than those who were not. No significant correlation between IgE levels and family history of allergic disease or with exposure to second-hand smoke was seen. Dp-specific IgE levels of patients exposed to household pets were significantly lower compared to those without exposure. Conclusion This study proves that sensitization to Bt, Df, and Dp allergens is not significantly associated with asthma symptoms and control. Although cases were shown to be sensitized to HDMs, their current medications were at least effective in controlling their asthma symptoms.
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Affiliation(s)
- Pia Marie Albano
- Department of Natural Sciences, College of Nursing, University of Santo Tomas, Manila 1015, Philippines
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Chen YC, Tsai CH, Lee YL. Early-life indoor environmental exposures increase the risk of childhood asthma. Int J Hyg Environ Health 2011; 215:19-25. [PMID: 21835690 DOI: 10.1016/j.ijheh.2011.07.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Revised: 06/30/2011] [Accepted: 07/17/2011] [Indexed: 10/17/2022]
Abstract
We aim to explore the relationships between exposure to dampness, pets, and environmental tobacco smoke (ETS) early in life and asthma in Taiwanese children, and to discuss their links to early- and late-onset asthma. We conducted a 1:2 matched case-control study from the Taiwan Children Health Study, which was a nationwide study that recruited 12-to-14 year-old school children in 14 communities. The 579 mothers of the participants were interviewed by telephone about their children's environmental exposures before they were 5 years old, including the in-utero period. Childhood asthma was associated with exposure to early life environmental factors, such as cockroaches (OR=2.16; 95% CI, 1.15-4.07), visible mould (OR=1.75; 95% CI, 1.15-2.67), mildewy odors (OR=5.04; 95% CI, 2.42-10.50), carpet (OR=2.36; 95% CI, 1.38-4.05), pets (OR=2.11; 95% CI, 1.20-3.72), and more than one hour of ETS per day (OR=1.93; 95% CI, 1.16-3.23). The ORs for mildewy odors, feather pillows, and ETS during early childhood were greater among children with late-onset asthma. Cockroaches, carpet, pets, and in-utero exposures to ETS affected the timing of early-onset asthma. Exposure to these factors led to dose-responsiveness in the risk of asthma. And the earlier exposures may trigger the earlier onset. Interventions in avoiding these environmental exposures are necessary for early-prevention of childhood asthma.
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Affiliation(s)
- Yang-Ching Chen
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, 17 Xuzhou Road, Zhongzheng District, Taipei 100, Taiwan
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Liang KL, Su MC, Shiao JY, Wu SH, Li YH, Jiang RS. Role of pollen allergy in Taiwanese patients with allergic rhinitis. J Formos Med Assoc 2011; 109:879-85. [PMID: 21195885 DOI: 10.1016/s0929-6646(10)60134-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2009] [Revised: 11/15/2009] [Accepted: 12/25/2009] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND/PURPOSE Pollen allergy is believed to be less common in East Asia, Latin America, and tropical areas. The purpose of this study was to understand the role of pollen allergy in Taiwan. METHODS Patients with clinically diagnosed allergic rhinitis were enrolled. All subjects received a 30-item skin test panel that included perennial allergens (house dust mix, Dermatophagoides pteronyssinus, Dermatophagoides farinae, dog epithelium, cat hairs, cockroach mix, and Candida albicans) and pollen allergens (acacia, pine mix, eucalyptus, beefwood, juniper mix, willow, mulberry mix, pepper tree, cedar, Johnson grass, Bermuda grass, ragweed mix, Timothy grass, spiny pigweed, cocklebur, sage mix, sheep sorrel, dog fennel, pigweed mix, English plantain, castor bean, alfalfa, and dandelion). RESULTS A total of 419 patients were recruited. A total of 313 (74.7%) had a positive skin test. A total of 288 patients (68.7%) were sensitive to perennial allergens, and 11 8 patients (28.2%) were sensitive to pollen allergens. However, 93 pollen-sensitive patients were also sensitive to perennial allergens, and only 25 were sensitive to pollen allergens alone. The most common allergens were D. pteronyssinus, D. farinae, house dust mix, and cockroach, but the most common pollen allergens were spiny pigweed, Johnson grass, and sheep sorrel. All nasal symptoms tended to be more severe in patients who were sensitive to perennial allergens than in those who were sensitive to pollen allergens alone. CONCLUSION Most patients with allergic rhinitis in Taiwan are sensitive to perennial allergens, and pollens are a less common allergen.
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Affiliation(s)
- Kai-Li Liang
- Department of Otolaryngology, Taichung Veterans General Hospital, Taipei, Taiwan
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Priftis KN, Mantzouranis EC, Anthracopoulos MB. Asthma symptoms and airway narrowing in children growing up in an urban versus rural environment. J Asthma 2009; 46:244-51. [PMID: 19373631 DOI: 10.1080/02770900802647516] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The development of asthma and allergy appears to be the result of gene-environment interaction. Potential environmental risk factors such as outdoor and indoor air pollution, infections, allergen exposure, diet, and lifestyle patterns may trigger respiratory symptoms and compromise lung function in children. Specific features of urban and rural lifestyle may constitute distinct risk factors but may also coexist within certain socioeconomic levels. Children of rural environments are at lower risk for asthma and aeroallergen sensitization. The protective effect has been associated with close contact with large animals, but the genetic factor also plays a contributory role. Children with prolonged exposure to urban environment are at increased risk of reduced lung function and those that reside in polluted areas exhibit slower lung growth. It is possible that polluted urban environment per se facilitates subclinical small airway disease. Evidence to date supports a strong relation between residential area as a potential risk factor for childhood asthma symptoms and airway obstruction and a western type of socioeconomic development.
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Affiliation(s)
- Kostas N Priftis
- Department of Allergy-Pneumonology, Penteli Children's Hospital, P. Penteli, Athens, Greece.
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Lee YL, Gilliland FD, Wang JY, Lee YC, Guo YL. Associations of FcɛRIβ E237G polymorphism with wheezing in Taiwanese schoolchildren. Clin Exp Allergy 2008; 38:413-20. [DOI: 10.1111/j.1365-2222.2007.02916.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Anthracopoulos MB, Mantzouranis E, Paliatsos AG, Tzavelas G, Lagona E, Nicolaidou P, Priftis KN. Different effects of sensitization to mites and pollens on asthma symptoms and spirometric indices in children: a population-based cohort study. Ann Allergy Asthma Immunol 2007; 99:122-9. [PMID: 17718099 DOI: 10.1016/s1081-1206(10)60635-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
BACKGROUND We have previously shown that long-term exposure of children to a highly polluted urban compared with a rural environment is associated with subclinical airway narrowing and increased prevalence of atopy. OBJECTIVE To test the hypothesis that sensitization to indoor perennial, compared with seasonal, aeroallergens has distinct effects on asthma symptoms and/or spirometric indices. METHODS We evaluated the respiratory health of 478 and 342 children aged 8 to 10 years living in an urban and a rural area, respectively, during a period of 8 years. Children were evaluated by parental questionnaire in 3 phases, 1995 to 1996 (phase 1), 1999 to 2000 (phase 2), and 2003 to 2004 (phase 3), and by spirometry and skin prick testing to 9 common local aeroallergens in phases 1 and 2. RESULTS Sensitization to pollens was associated with current wheezing in phase 1 of the study (odds ratio [OR], 3.36; 95% confidence interval [CI], 1.71 to 6.62; P < .001) but not with spirometric indices. Sensitization to mites was negatively associated with forced expiratory volume in 1 second (95% CI, -7.26 to -0.90; P = .01) and forced expiratory flow at 50% of forced vital capacity (95% CI, -10.80 to -1.33; P = .01) in study phase 1 but not in phase 2. CONCLUSIONS Our results indicate that sensitization to mites is associated with insidious involvement of large and small airways, whereas sensitization to pollens is associated with childhood wheezing at the age of 8 to 10 years. Subsequent loss of these associations implies that risk factors other than allergy influence airway disease at a later age.
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Wong KS, Huang YS, Huang YH, Chiu CY. Personality profiles and pulmonary function of children with sighing dyspnoea. J Paediatr Child Health 2007; 43:280-3. [PMID: 17444830 DOI: 10.1111/j.1440-1754.2007.01059.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIM This study compared the personality profiles of children with sighing dyspnoea with healthy children and tested the hypothesis of heightened anxiety scores in sighing dyspnoeic subjects using the Childhood Behavior Check List for Ages 4 to 18 (CBCL/4-18). The pulmonary function tests of these two groups of children were also compared. METHODS This prospective study enrolled paediatric patients with sighing dyspnoea presented to a paediatric pulmonary clinic but free from apparent cardiopulmonary diseases, and age-matched healthy children were recruited for comparison. The psychological profiles of the patients were collected by the CBCL/4-18, which was completed by the parents. Spirometry was performed on sighing children as well as volunteer healthy children, before and after bronchodilator. RESULTS Twenty patients complained of sighing dyspnoea and 31 healthy children were included in the study. Both groups of children scored consistently within the normal ranges of all subscales including anxiety, somatic complaints or internalising behaviour on CBCL/4-18. The t-scores were not significant different between children with sighing dyspnoea and age-matched controls. Baseline forced vital capacity in the sighing patients appeared to be lower than the healthy children, but was not statistically significant. CONCLUSIONS The CBCL/4-18 scores of children with sighing dyspnoea were not significant different from age-matched healthy children and a heightened anxiety score was not confirmed in this study. Office spirometric values in patients with sighing dyspnoea were normal.
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Affiliation(s)
- Kin-Sun Wong
- Department of Paediatrics, Chang Gung Children's Hospital, Taoyuan, and College of Medicine, Chang Gung University, Taiwan.
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Tsai HJ, Tsai AC, Nriagu J, Ghosh D, Gong M, Sandretto A. Risk factors for respiratory symptoms and asthma in the residential environment of 5th grade schoolchildren in Taipei, Taiwan. J Asthma 2006; 43:355-61. [PMID: 16801139 DOI: 10.1080/02770900600705326] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
This study examined the association of residential environmental factors with respiratory symptoms and asthma in 2,290 fifth graders in Taipei, Taiwan. A self-report survey questionnaire elicited experiences of respiratory symptoms, disease history, and characteristics of residential environmental factors from schoolchildren. The proportion of schoolchildren having physician-diagnosed asthma was 9.8% and suspected asthma was 16.1%. The proportions of having respiratory symptoms in the past 12 months ranged from 9.8% for wheezing without a cold to 40.5% for exercise-induced cough. Higher proportions of boys had non-exercise-induced respiratory symptoms, physician-diagnosed asthma, and suspected asthma than girls (p < 0.05). Exposure to odoriferous chemical vapor was significantly associated with all seven respiratory symptoms considered in the study (p < 0.05). After adjusting for confounding factors including residential districts, gender, diagnosed allergy, and parental history of respiratory symptoms, odoriferous chemical vapors, gas leaks, dehumidifier use, presence of cockroaches at home, and leaky water/water puddle at home were significantly associated with the proportions of physician-diagnosed asthma or suspected asthma of the schoolchildren. The adjusted odds ratio (aOR) of physician-diagnosed asthma was 2.35 (95% confidential interval = 1.45-3.82) for odoriferous chemical vapor. The aOR of suspected asthma measure was 2.14 (95% CI = 1.40-3.26) for odoriferous chemical vapor. Odoriferous chemical vapor was the major risk factor of respiratory illness in the residential environment of schoolchildren in Taipei. Other household risk factors included gas leaks, dampness, and cockroaches at home.
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Affiliation(s)
- Hsin-Jen Tsai
- Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, USA
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Lee YL, Hsiue TR, Lee CH, Su HJJ, Leon Guo Y. Home exposures, parental atopy, and occurrence of asthma symptoms in adulthood in southern Taiwan. Chest 2006; 129:300-308. [PMID: 16478845 DOI: 10.1378/chest.129.2.300] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
OBJECTIVE Parental atopy and environmental exposures at home have been recognized risk factors for adulthood asthma. However, the relative contributions of specific risk factors and the overall contributions of heredity or home exposure remain unexplored. The purpose of this study was to identify predictors and estimate the population attributable risk (PAR) of each exposure for typical asthma symptoms among 26- to 50-year-old Taiwanese. We also investigated whether an interactive effect existed between parental atopy and home exposures on the occurrence of asthma symptoms in adulthood. DESIGN A cross-sectional study with retrospective components. SETTING Elementary and middle schools in Southern Taiwan. SUBJECTS Between March and October 2004, we conducted a cross-sectional survey among schoolchildren's parents from 94 elementary and middle schools in Southern Taiwan. The main outcome measure was typical asthma-like symptoms occurring within the preceding 5 years. Information on hereditary and home exposures was collected by using a self-administered questionnaire. RESULTS After excluding unqualified questionnaires, data from 24,784 subjects were left for analysis. New-onset asthma was reported for 0.83% of male (n = 80 of 9,662) and 1.36% of female subjects (n = 206 of 15,122). Besides parental atopic factors, environmental tobacco smoke or pet avoidance and visible mold on walls at home were independently associated with the occurrence of asthma symptoms. Mutually adjusted models produced statistically significant associations between any home exposure (odds ratio [OR], 1.80; 95% confidence interval [CI], 1.08 to 3.23; PAR, 28.04%), parental atopy (OR, 4.47; 95% CI, 3.47 to 5.75; PAR, 31.38%), and new-onset asthma. However, there was no interaction between parental atopy and home exposures. CONCLUSIONS Home exposures and parental atopy both increased the risks of new-onset asthma in adulthood but did not show an interactive effect. These two exposure categories approximately contributed equally to the adulthood asthma.
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Affiliation(s)
- Yung-Ling Lee
- Department of Occupational and Environmental Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Tzuen-Ren Hsiue
- Department of Internal Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Cheng-Hung Lee
- Department of Internal Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Huey-Jen Jenny Su
- Graduate Institute of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yueliang Leon Guo
- Department of Occupational and Environmental Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
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Huang CH, Liew LM, Mah KW, Kuo IC, Lee BW, Chua KY. Characterization of glutathione S-transferase from dust mite, Der p 8 and its immunoglobulin E cross-reactivity with cockroach glutathione S-transferase. Clin Exp Allergy 2006; 36:369-76. [PMID: 16499649 DOI: 10.1111/j.1365-2222.2006.02447.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Sensitization to mite and cockroach allergens is common, and diagnosis and therapy of allergy can be further complicated by the presence of allergen isoforms and panallergens. Purified recombinant and native allergens are useful for studies to resolve such problems. OBJECTIVE To assess the allergenicity of native and recombinant mite glutathione S-transferase (GST) (Der p 8) and study the IgE cross-reactivity between Der p 8 and cockroach GST. METHODS Der p 8 cDNA encoding a new isoform was isolated and expressed in yeast. Native Der p 8 was affinity purified from mite extract. IgE reactivity to native and recombinant Der p 8 was assessed by ELISA using sera from allergic subjects from Taiwan, Singapore and Malaysia. IgE cross-reactivity between Der p 8 and cockroach GST was examined by IgE inhibition assays. RESULTS Our Der p 8 cDNA encoded a basic isoform (pI=8.5) containing six polymorphic residues located at positions 46, 106, 149, 160, 167 and 184. At least 8 isoforms of native Der p 8 were detected by two-dimensionalgel and immunoblot analyses. Sera from Taiwanese asthmatics showed 96% and 84% IgE reactivity to native Der p 8 and recombinant Der p 8, respectively. Native Der p 8 showed 75% and 65% IgE reactivity with sera from Malaysia and Singapore, respectively. CONCLUSIONS A high frequency of sensitization to mite GST among allergic subjects was observed but the titres of IgE reactivity were low. The IgE cross-reactivity between mite and cockroach GST suggests that GST is a panallergen.
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Affiliation(s)
- C H Huang
- Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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Abstract
Cockroaches produce several potent allergens associated with sensitization and the development of asthma. Many of these allergens have been cloned and produced as biologically active recombinant proteins. Three-dimensional structure and molecular modeling, in addition to studies on the biological functions of these proteins in the cockroach, have provided new insights into the ability of these allergens to cause immunoglobulin E antibody responses. Recent studies have pointed to a potential role of recombinant cockroach allergens for diagnosis and the development of novel therapeutic strategies that may benefit cockroach-allergic patients.
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Affiliation(s)
- L Karla Arruda
- Departamento de Clínica Médica, Faculdade de Medicina de Ribeirão Preto - USP, Av. Bandeirantes 3900, Ribeirão Preto, SP 14049-900, Brazil.
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Lee YL, Lin YC, Lee YC, Wang JY, Hsiue TR, Guo YL. Glutathione S-transferase P1 gene polymorphism and air pollution as interactive risk factors for childhood asthma. Clin Exp Allergy 2005; 34:1707-13. [PMID: 15544594 DOI: 10.1111/j.1365-2222.2004.02099.x] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Polymorphisms at the glutathione S-transferase (GST) P1 locus were associated with asthma-related phenotypes and bronchial hyper-responsiveness. OBJECTIVE This study investigated whether GSTP1 genotypes and outdoor air pollution were interactive risk factors on childhood asthma. METHODS Four hundred and thirty-six subjects were recruited for oral mucosa samplings from 2853 fourth- to ninth-grade schoolchildren from three districts with different air pollution levels in southern Taiwan. PCR-based assays were performed by oral mucosa DNA to determine GSTP1 genotypes. We also conducted a nested case-control study comprising 61 asthmatic children and 95 controls confirmed by International Study of Asthma and Allergies in Childhood questionnaire results and methacholine challenge test. Multiple logistic regression was used to adjust for potential confounding factors. RESULTS All participants were homozygous at the Ala-114 locus. Although only a marginally significant association existed between the frequency of homozygosity at the Ile-105 locus and asthma when air pollution was not considered, we found a significant gene-environmental interaction between GSTP1-105 alleles and air pollution after adjusting for confounders (P=0.035). Specifically, we found that compared with participants carrying any Val-105 allele in low air pollution, those who are Ile-105 homozygotes in high air pollution district had a significantly increased risk of asthma (adjusted odds ratio (AOR)=5.52, 95% confidence interval (CI)=1.64-21.25). Compared with participants carrying any Val-105 allele, in high air pollution district, children with Ile-105 homozygotes had a significantly increased risk of asthma (AOR=3.79, 95% CI=1.01-17.08), but those who carried two Ile-105 alleles in low or moderate air pollution districts did not show similar tendencies. The risk of asthma also revealed a clear dose-response relationship with outdoor air pollution in children with Ile-105 homozygotes. CONCLUSION Our result suggests a gene-environmental interaction between GSTP1-105 genotypes and outdoor air pollution on childhood asthma.
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Affiliation(s)
- Y-L Lee
- Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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Choi SY, Sohn MH, Yum HY, Kwon BC, Kim KE. Correlation between inhalant allergen-specific IgE and pulmonary function in children with asthma. Pediatr Pulmonol 2005; 39:150-5. [PMID: 15633201 DOI: 10.1002/ppul.20163] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Sensitization to aeroallergens is associated with diminished lung function in adults. Little has been studied on the relationship between the inhalant allergen-specific IgE and pulmonary function in asthmatic children. This study was focused on four major inhalant allergens found in Korea, including Dermatophagoides pteronyssinus (Der p.), Dermatophagoides farinae (Der f.), and Alternaria- and German cockroach-specific IgEs, with evaluation of pulmonary function in relation to the amount of allergens. The parents or legal guardians of participants enrolled in this study gave informed consent. Fifty-five asthmatic patients and 48 nonasthmatic children were included. The amounts of specific IgE for the four specified inhalant allergens were determined by employing the CAP system FEIA. Forced expiratory volume in 1 sec (FEV(1))/forced vital capacity (FVC), FEV(1), and forced expiratory flow between 25% and 75% of FVC (FEF(25-75)) of subjects were evaluated through pulmonary function tests. In the asthmatic group, FEV(1), FEV(1)/FVC, and FEF(25-75) were significantly reduced (P < 0.05): reduction in FEV(1) (r = -0.44) and FEF(25-75) (r = -0.33) in association with the Der f.-specific allergen, and reduction in FEV(1) (r = -0.37) and FEF(25-75) (r = -0.34) in association with the Der p.-specific allergen, were observed. However, there was no significant correlation with German cockroach and Alternaria allergen. In the control group, no significant correlation was detectable between the allergen-specific IgE titers and the results of pulmonary function tests. In asthmatic patients, Der p.- and Der f.-specific IgEs, and not German cockroach and Alternaria, seem to play a considerable role in reduced pulmonary function among asthmatic children.
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Affiliation(s)
- Sung-Yon Choi
- Department of Pediatrics and Allergy Institute, Yonsei University College of Medicine, Seoul, Korea
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Lin YC, Wen HJ, Lee YL, Guo YL. Are maternal psychosocial factors associated with cord immunoglobulin E in addition to family atopic history and mother immunoglobulin E? Clin Exp Allergy 2004; 34:548-54. [PMID: 15080806 DOI: 10.1111/j.1365-2222.2004.1928.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Atopy in maternal and family histories is known to be a risk factor for elevated umbilical cord immunoglobulin E (cIgE). However, the association between cIgE and psychosocial factors remains under investigation. OBJECTIVE To explore whether psychosocial factors in addition to atopy contribute to elevated cIgE. METHODS Four private maternity hospitals fitting the quantile levels of SO(2) in 2000 cooperated with us by recruiting participants for this study: pairs of mothers and neonates living within 3-km catchment areas of air-monitoring stations. We used a questionnaire to collect exposure data, and the Pharmacia UniCap IgE assay test system to determine the levels of IgE in gravidas and cord blood. RESULTS Between July 2001 and March 2003, 334 mother and neonate pairs participated in this study. The frequencies of sensitization, serum IgE (sIgE)>100 IU/mL, or cIgE> or =0.35 IU/mL were not different between the four different hospitals. By multi-variate logistic regression analysis adjusted for environmental factors, genetic factors, and psychosocial factors, the risk factors for elevated cIgE were being a male neonate (odds ratio (OR)=3.5, 95% confidence interval (CI)=[1.5, 8.5]), carpets at home (OR=3.0, 95% CI=[1.02, 8.4]), maternal allergy to dog dander (OR=9.7, 95% CI=[1.2, 98.8], maternal total serum IgE>100 IU/mL (OR=5.1, 95% CI=[2.2, 12.8]), maternal regularly/mostly/often self-reported nervousness (OR=4.0, 95% CI=[1.3, 12.8]), family income 11,574-17 361 US dollars/year (OR=3.7, 95% CI=[1.3, 11.5]), incense burning (OR=4.0, 95% CI=[1.4, 13.3]), and atopy in maternal grandparents (OR=4.8, 95% CI=[1.7, 14.0]). By principle component analysis and logistic regression, psychosocial stress (beta +/- standard error=0.26+/-0.13, P=0.04) was associated with increased cIgE. CONCLUSION Psychosocial factors are potentially important risk factors for elevated cIgE.
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Affiliation(s)
- Y-C Lin
- School of Dentistry, Kaohsiung Medical University, Kaohsiung, Taiwan
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Lee YL, Lin YC, Hsiue TR, Hwang BF, Guo YL. Indoor and outdoor environmental exposures, parental atopy, and physician-diagnosed asthma in Taiwanese schoolchildren. Pediatrics 2003; 112:e389. [PMID: 14595082 DOI: 10.1542/peds.112.5.e389] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVE Parental atopy and environmental exposures are recognized risk factors for childhood asthma. However, the relative contributions of specific risk factors and the overall contributions of indoor and outdoor exposures remain unexplored. This study was undertaken to identify risk factors, estimate the population attributable risk of each exposure, and compare the data for boys versus girls for physician-diagnosed asthma in Taiwanese schoolchildren. METHODS During a February to June 2001 cross-sectional national survey, 35 036 6- to 15-year-old schoolchildren were chosen from 22 elementary and 22 middle schools located within 1-km catchment areas of 22 air-monitoring stations in Taiwan. The main outcome measure was physician-diagnosed asthma, as reported by the parents. We investigated hereditary and indoor and outdoor environmental factors for childhood asthma by questionnaire. The adjusted prevalences of questionnaire-determined outdoor indicators were also compared with air-monitoring data. RESULTS Outdoor air pollutants were associated with parent-reported perceived ambient air pollution. Physician-diagnosed asthma was reported for 8.1% of the boys (1330 of 16 441) and 5.6% of the girls (894 of 16 056). The risk of physician-diagnosed asthma was significantly associated with parental atopy and perceived ambient air pollution in both sexes. The presence of visible cockroaches (odds ratio [OR]: 1.30; 95% confidence interval [CI]: 1.07-1.59), mold on walls at home (OR: 1.20; 95% CI: 1.01-1.41), and water damage (OR: 1.33; 95% CI: 1.02-1.70) were also associated with asthma in girls; however, only visible mold on walls at home was related to asthma in boys. Mutually adjusted analytical models produced statistically significant associations between any indoor factor and asthma in girls (OR: 1.24; 95% CI: 1.00-1.56) but not in boys (OR: 1.04; 95% CI: 0.87-1.25). For all hereditary and environmental factors, the total population attributable risk was 44.31% in boys and 60.61% in girls. CONCLUSIONS Parental atopy contributed more to childhood asthma than indoor or outdoor environmental factors. Girls may be more susceptible to indoor factors than boys.
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Affiliation(s)
- Yung-Ling Lee
- Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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Gargano D, Romano C, Manguso F, Cutajar M, Altucci P, Astarita C. Relationship between total and allergen-specific IgE serum levels and presence of symptoms in farm workers sensitized to Tetranychus urticae. Allergy 2002; 57:1044-7. [PMID: 12359001 DOI: 10.1034/j.1398-9995.2002.23745.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND Clinical complaints in atopic subjects with asthma and rhinitis occur more frequently in the presence of high total and allergen-specific IgE serum levels. Here we report on the relationship between total and allergen-specific IgE serum levels and presence of symptoms in an unselected farmer population sensitized to Tetranychus urticae (TU). METHODS Farmers were recruited as previously described. Total IgE and allergen-specific IgE were measured by immunoassay in TU-positive skin prick test (SPT) farmers (n = 58) and two control groups including Dermatophagoides pteronyssinus (Dp)-positive SPT subjects (n = 40) and non-atopic, TU-negative SPT healthy farmers (n = 25). RESULTS Both TU+ and Dp+ subjects had significantly higher total IgE values (P < 0.001) than healthy non-atopic subjects. TU-specific IgE levels were significantly more elevated in symptomatic than non-symptomatic TU+ subjects (P = 0.028). Dp-specific IgE levels were higher in symptomatic than non-symptomatic Dp+ subjects (P = 0.003). Finally, total IgE levels were significantly higher in the symptomatic than non-symptomatic subgroups in both TU+ and Dp+ subjects (P < 0.0001 and P = 0.007, respectively). Logistic regression analysis showed that only total IgE concentrations were significant predictors of current symptoms in TU+ subjects. CONCLUSIONS High total IgE and allergen-specific IgE levels are associated with symptoms in TU+ subjects. Definition of their predictive value requires further studies.
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Affiliation(s)
- D Gargano
- Section of Allergology and Clinical Immunology, Division of Internal Medicine, F. Magrassi-A Lanzara Department of Clinical and Experimental Medicine and Surgery, Second University of Naples School of Medicine, Naples, Italy
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Lin YC, Lu CC, Su HJ, Shen CY, Lei HY, Guo YL. The association between tumor necrosis factor, HLA-DR alleles, and IgE-mediated asthma in Taiwanese adolescents. Allergy 2002; 57:831-4. [PMID: 12169181 DOI: 10.1034/j.1398-9995.2002.23719.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND Human leukocyte antigen (HLA) DR genes and the tumor necrosis factor (TNF) gene locus are associated with asthma and IgE production. TNFalpha-308G/A frequencies between Japanese and Caucasians in the UK have been found to be different. The roles of HLA-DRB1 and TNF genotypes are unknown in Taiwanese adolescents with IgE-mediated asthma (I-asthma). METHODS From the population of a 1996 nation-wide survey, we recruited a random sample for a physical examination, determination of total serum IgE (sIgE), dust-mite-specific IgE, and HLA-DRB1, TNFalpha-308, and LTalphaNcoI polymorphisms by polymerase chain reaction. RESULTS A total of 80 I-asthmatics and 69 non-asthmatics completed the study. We suggested that I-asthmatics had a higher frequency of the DR13 gene (OR = 8.6, 95% CI = [1.6-161]). The DR13 gene was associated with high sIgE and high dust-mite-specific IgE, especially Dermatophagoides farinae. No TNF haplotype or genotype was associated with I-asthma. The DR13 gene was linked to the LTalphaNcoI*1 allele. When sIgE was adjusted by multiple logistic regression, the risk of I-asthma was much higher for the DR13(+)/LTalphaNcoI*1 haplotype (OR = 25.6, 95% CI = [2.2-1378]) than for the others. CONCLUSIONS In Taiwanese children sensitized to Der f, the DR13(+)/LTalphaNcoI*1 haplotype was associated with a much higher risk of having clinical asthma than any other DR13/LTalphaNcoI haplotype.
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Affiliation(s)
- Ying-Chu Lin
- Department of Environmental and Occupational Health, National Cheng Kung University, Tainan, Taiwan
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