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Zhang G, Le Souëf P. The influence of modern living conditions on the human microbiome and potential therapeutic opportunities for allergy prevention. World Allergy Organ J 2024; 17:100857. [PMID: 38235259 PMCID: PMC10793171 DOI: 10.1016/j.waojou.2023.100857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 12/01/2023] [Accepted: 12/09/2023] [Indexed: 01/19/2024] Open
Abstract
Modern living conditions and the recent surge in global urbanization have transformed the human microbiome. This transformation is believed to be a significant factor in the recent spike of common chronic inflammatory diseases like asthma and allergies worldwide, evident in both developed and developing nations. Immigrants from less developed regions who settle in highly urbanized and affluent areas present an ideal demographic for research. Investigating immigrant populations can yield valuable insights, particularly when studying microbiome changes that occur as individuals transition from areas with low asthma prevalence to regions with a high prevalence of the condition. The application of prebiotics and probiotics as potential treatments for asthma and allergies faces challenges. This is due to the complex interplay of numerous factors that contribute to their aetiology. Exploring the interaction between the human microbiome and potential epigenetic changes in specific populations, such as immigrants adapting to new, urbanized environments, may offer crucial insights. Such research could underscore the role of prebiotics and probiotics in preventing allergic conditions. Recognizing the changes in the human microbiome in the context of a Western/modern environment might be essential in addressing the increasing prevalence of allergic diseases. Persistent research in this domain is pivotal for devising effective interventions such as dietary supplementation with prebiotics and probiotics.
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Affiliation(s)
- Guicheng Zhang
- School of Population Health, Curtin University, Perth, 6102, Western Australia, Australia
- School of Biomedical Sciences, The University of Western Australia, Perth, Western Australia 6008, Australia
| | - Peter Le Souëf
- School of Population Health, Curtin University, Perth, 6102, Western Australia, Australia
- School of Medicine, The University of Western Australia, Perth, Western Australia 6008, Australia
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2
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Blanco-Aparicio M, García-Río FJ, González-Barcala FJ, Jiménez-Ruiz CA, Muñoz X, Plaza V, Soto-Campos JG, Urrutia-Landa I, Almonacid C, Peces-Barba G, Álvarez-Gutiérrez FJ. [A Study of the Prevalence of Asthma in the General Population in Spain]. OPEN RESPIRATORY ARCHIVES 2023; 5:100245. [PMID: 37496876 PMCID: PMC10369549 DOI: 10.1016/j.opresp.2023.100245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Accepted: 03/29/2023] [Indexed: 07/28/2023] Open
Abstract
Introduction Asthma is a disease with high prevalence, which affects all age groups and generates high health and social care costs. Studies carried out in a number of populations show great variability in its prevalence, even in geographically close populations, with data suggesting a relevant influence of socio-economic factors. At present, we do not have reliable data on the prevalence of this disease in the adult population of Spain. The objectives of this study are to estimate the prevalence of asthma in the Spanish population for those aged 18-79, to describe the variability between autonomous communities, to estimate the prevalence of under and overdiagnosis, to analyse the prevalence of uncontrolled asthma and steroid-dependent asthma, to evaluate the health care cost, to identify the most frequent phenotypes and to establish a starting point to evaluate the temporal trend with subsequent studies. Methods A cross-sectional, two-stage study will be carried out, including patients from 50 catchment areas. The study will be carried out in 3 phases: 1) screening and confirmation in the clinical history, in which patients with a previously correctly established diagnosis of asthma will be identified; 2) diagnosis of asthma to evaluate patients without a confirmed or excluded diagnosis; 3) characterization of asthma, where the characteristics of the asthmatic patients will be analysed, identifying the most frequent phenotypes. Discussion It seems necessary and feasible to carry out an epidemiological study of asthma in Spain to identify the prevalence of asthma, to optimize healthcare planning, to characterize the most frequent phenotypes of the disease, and to evaluate inaccurate diagnoses.
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Affiliation(s)
| | - Francisco José García-Río
- Servicio de Neumología, Hospital Universitario La Paz-IdiPAZ, Madrid, España
- Universidad Autónoma de Madrid, Madrid, España
- Centro de Investigación Biomédica en Red en Enfermedades Respiratorias (CIBERES), Madrid, España
| | - Francisco Javier González-Barcala
- Centro de Investigación Biomédica en Red en Enfermedades Respiratorias (CIBERES), Madrid, España
- Grupo de Investigación Traslacional de Enfermedades de la Vía Aérea, Fundación Instituto de Investigación Sanitaria de Santiago de Compostela, Santiago de Compostela, España
- Departamento de Medicina, Universidad de Santiago de Compostela, Santiago de Compostela, España
- Servicio de Neumología, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, España
| | | | - Xavier Muñoz
- Centro de Investigación Biomédica en Red en Enfermedades Respiratorias (CIBERES), Madrid, España
- Servicio de Neumología, Hospital Vall d’Hebron, Barcelona, España
- Departamento de Biología Celular, Fisiología e Inmonología, Universidad Autónoma de Barcelona, Barcelona, España
| | - Vicente Plaza
- Centro de Investigación Biomédica en Red en Enfermedades Respiratorias (CIBERES), Madrid, España
- Servicio de Neumología, Hospital de la Santa Creu i Sant Pau, Barcelona, España
- Institut de Investigació Biomèdica Sant Pau-IIB Sant Pau, Barcelona, España
- Departamento de Medicina, Universidad Autónoma de Barcelona, Barcelona, España
| | | | - Isabel Urrutia-Landa
- Servicio de Neumología, Hospital de Galdakao, Bizkaia, España
- Instituto de Investigación Sanitaria Biocruces, Bizkaia, España
| | - Carlos Almonacid
- Servicio de Neumología, Hospital Universitario Puerta de Hierro Majadahonda, Madrid, España
| | - Gregorio Peces-Barba
- Instituto de Investigación Sanitaria, Fundación Jiménez Díaz, Madrid, España
- Universidad Autónoma de Madrid, Madrid, España
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3
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Haahtela T, Alenius H, Auvinen P, Fyhrquist N, von Hertzen L, Jousilahti P, Karisola P, Laatikainen T, Lehtimäki J, Paalanen L, Ruokolainen L, Saarinen K, Valovirta E, Vasankari T, Vlasoff T, Erhola M, Bousquet J, Vartiainen E, Mäkelä MJ. A short history from Karelia study to biodiversity and public health interventions. FRONTIERS IN ALLERGY 2023; 4:1152927. [PMID: 36998574 PMCID: PMC10043497 DOI: 10.3389/falgy.2023.1152927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 02/21/2023] [Indexed: 03/15/2023] Open
Abstract
Contact with natural environments enriches the human microbiome, promotes immune balance and protects against allergies and inflammatory disorders. In Finland, the allergy & asthma epidemic became slowly visible in mid 1960s. After the World War II, Karelia was split into Finnish and Soviet Union (now Russia) territories. This led to more marked environmental and lifestyle changes in the Finnish compared with Russian Karelia. The Karelia Allergy Study 2002–2022 showed that allergic conditions were much more common on the Finnish side. The Russians had richer gene-microbe network and interaction than the Finns, which associated with better balanced immune regulatory circuits and lower allergy prevalence. In the Finnish adolescents, a biodiverse natural environment around the homes associated with lower occurrence of allergies. Overall, the plausible explanation of the allergy disparity was the prominent change in environment and lifestyle in the Finnish Karelia from 1940s to 1980s. The nationwide Finnish Allergy Programme 2008–2018 implemented the biodiversity hypothesis into practice by endorsing immune tolerance, nature contacts, and allergy health with favorable results. A regional health and environment programme, Nature Step to Health 2022–2032, has been initiated in the City of Lahti, EU Green Capital 2021. The programme integrates prevention of chronic diseases (asthma, diabetes, obesity, depression), nature loss, and climate crisis in the spirit of Planetary Health. Allergic diseases exemplify inappropriate immunological responses to natural environment. Successful management of the epidemics of allergy and other non-communicable diseases may pave the way to improve human and environmental health.
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Affiliation(s)
- Tari Haahtela
- Skin and Allergy Hospital, Helsinki University Hospital, Helsinki, Finland
- University of Helsinki, Helsinki, Finland
- Correspondence: Tari Haahtela
| | - Harri Alenius
- Human Microbiome Research (HUMI), Faculty of Medicine, University of Helsinki, Helsinki, Finland
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Petri Auvinen
- DNA Sequencing and GenomicsLaboratory, Institute of Biotechnology, Helsinki, Finland
| | - Nanna Fyhrquist
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | | | - Pekka Jousilahti
- Department of Public Health and Welfare, Finnish Institute for Health and Welfare (THL), Helsinki, Finland
| | - Piia Karisola
- Human Microbiome Research (HUMI), Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Tiina Laatikainen
- Department of Public Health and Welfare, Finnish Institute for Health and Welfare (THL), Helsinki, Finland
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
| | | | - Laura Paalanen
- Department of Public Health and Welfare, Finnish Institute for Health and Welfare (THL), Helsinki, Finland
| | - Lasse Ruokolainen
- Department of Biosciences, University of Helsinki, Helsinki, Finland
| | | | - Erkka Valovirta
- Department of Pulmonary Diseases and Clinical Allergology, University of Turku, Turku, Finland
- Allergy Clinic, Terveystalo, Turku, Finland
| | - Tuula Vasankari
- Department of Pulmonary Diseases and Clinical Allergology, University of Turku, Turku, Finland
- Finnish Lung Health Association (FILHA), Helsinki, Finland
| | - Tiina Vlasoff
- North Karelia Centre for Public Health, Joensuu, Finland
| | - Marina Erhola
- Pirkanmaa Joint Authority for Health Services and Social Welfare, Tampere, Finland
| | - Jean Bousquet
- Institute of Allergology, Charité — Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
- Institute for Translational Medicine and Pharmacology ITMP, Allergology and Immunology, Berlin, Germany
- University Hospital Montpellier, Montpellier, France
| | - Erkki Vartiainen
- Department of Public Health and Welfare, Finnish Institute for Health and Welfare (THL), Helsinki, Finland
| | - Mika J. Mäkelä
- Skin and Allergy Hospital, Helsinki University Hospital, Helsinki, Finland
- University of Helsinki, Helsinki, Finland
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4
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Gribben KC, Wyss AB, Poole JA, Farazi PA, Wichman C, Richards-Barber M, Beane Freeman LE, Henneberger PK, Umbach DM, London SJ, LeVan TD, Gribben KC. CC16 polymorphisms in asthma, asthma subtypes, and asthma control in adults from the Agricultural Lung Health Study. Respir Res 2022; 23:305. [PMID: 36352422 PMCID: PMC9644514 DOI: 10.1186/s12931-022-02211-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Accepted: 10/04/2022] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND The club cell secretory protein (CC16) has anti-inflammatory and antioxidant effects and is a potential early biomarker of lung damage. The CC16 single nucleotide polymorphism (SNP) rs3741240 risk allele (A) has been inconsistently linked to asthma; other tagging SNPs in the gene have not been explored. The aim was to determine whether CC16 tagging polymorphisms are associated with adult asthma, asthma subtypes or asthma control in the Agricultural Lung Health Study (ALHS). METHODS The ALHS is an asthma case-control study nested in the Agricultural Health Study cohort. Asthma cases were individuals with current doctor diagnosed asthma, likely undiagnosed asthma, or asthma-COPD overlap defined by questionnaire. We also examined asthma subtypes and asthma control. Five CC16 tagging SNPs were imputed to 1000 Genomes Integrated phase 1 reference panel. Logistic regression was used to estimate associations between CC16 SNPs and asthma outcomes adjusted for covariates. RESULTS The sample included 1120 asthma cases and 1926 controls of European ancestry, with a mean age of 63 years. The frequency of the risk genotype (AA) for rs3741240 was 12.5% (n = 382). CC16 rs3741240 was not associated with adult asthma outcomes. A tagging SNP in the CC16 gene, rs12270961 was associated with uncontrolled asthma (n = 208, ORadj= 1.4, 95% CI 1.0, 1.9; p = 0.03). CONCLUSION This study, the largest study to investigate associations between CC16 tagging SNPs and asthma phenotypes in adults, did not confirm an association of rs3741240 with adult asthma. A tagging SNP in CC16 suggests a potential relationship with asthma control.
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Affiliation(s)
- KC Gribben
- grid.266813.80000 0001 0666 4105Department of Epidemiology, University of Nebraska Medical Center, 68198 Omaha, NE USA
| | - AB Wyss
- grid.94365.3d0000 0001 2297 5165Epidemiology Branch, National Institute of Environmental Health Sciences, Department of Health and Human Services, National Institutes of Health, Research Triangle Park, NC USA
| | - JA Poole
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, Division of Allergy and Immunology, University of Nebraska Medical Center, 68198 Omaha, NE USA
| | - PA Farazi
- grid.266813.80000 0001 0666 4105Department of Epidemiology, University of Nebraska Medical Center, 68198 Omaha, NE USA
| | - C Wichman
- grid.266813.80000 0001 0666 4105Department of Biostatistics, University of Nebraska Medical Center, 68198 Omaha, NE USA
| | | | - LE Beane Freeman
- grid.48336.3a0000 0004 1936 8075Occupational and Environmental Epidemiology Branch, National Cancer Institute, Bethesda, MD USA
| | - PK Henneberger
- grid.416738.f0000 0001 2163 0069Respiratory Health Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV USA
| | - DM Umbach
- grid.94365.3d0000 0001 2297 5165Biostatistics and Computational Biology Branch, National Institute of Environmental Health Sciences, Department of Health and Human Services, National Institutes of Health, Research Triangle Park, NC USA
| | - SJ London
- grid.94365.3d0000 0001 2297 5165Epidemiology Branch, National Institute of Environmental Health Sciences, Department of Health and Human Services, National Institutes of Health, Research Triangle Park, NC USA
| | - TD LeVan
- grid.266813.80000 0001 0666 4105Department of Epidemiology, University of Nebraska Medical Center, 68198 Omaha, NE USA ,grid.266813.80000 0001 0666 4105Department of Internal Medicine, Division of Pulmonary, Critical Care and Sleep, University of Nebraska Medical Center, 68198 Omaha, NE USA
| | - Kelli C. Gribben
- grid.266813.80000 0001 0666 4105Department of Epidemiology, University of Nebraska Medical Center, 68198 Omaha, NE USA
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Casas-Maldonado F, Álvarez-Gutiérrez FJ, Blanco-Aparicio M, Domingo-Ribas C, Cisneros-Serrano C, Soto-Campos G, Román-Bernal B, González-Barcala FJ. Monoclonal antibody treatment for severe uncontrolled asthma in Spain: analytical map. J Asthma 2021; 59:1997-2007. [PMID: 34503370 DOI: 10.1080/02770903.2021.1978483] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Monoclonal antibodies (mABs) have become available to treat more efficiently patients with severe uncontrolled asthma (SUA). However, the use of mABs is lower than expected given the prevalence of SUA, with significant disparities in the use of these treatments. OBJECTIVE To evaluate the proportion of patients with SUA treated with mABs in Spain, and to analyze some of the factors that could determine these prescription patterns. METHODS An analysis was performed on the data provided from the Hospitals National Health System (NHS) 2018 catalogue where Chest Diseases Department and a Hospital Pharmacy were available. Random sampling was performed to determine the sample size, stratifying proportionally by geographic area and hospital level. Characteristics of the participating sites, as well as the prescribing of mABs were collected, which included geographic area, hospital levels, prescribing medical specialities, types of clinics, and mABs prescribed. RESULTS Data from 90 hospitals were analyzed (Response rate 64.3%). Level 4 hospitals, the Canary Islands geographical area, and the presence of a high complexity Asthma Healthcare Unit (ACU) were associated with a higher probability that the SUA was treated with mABs. CONCLUSION The map of the prescribing of mABs for SUA in Spain shows a significant variation by geographic area, hospital level, type of clinic, and the accreditation level of the ACUs. At the current time, there appears to be significant under-prescribing of these treatments.
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Affiliation(s)
| | | | | | - Christian Domingo-Ribas
- Servei de Pneumologia, Corporació Sanitària Parc Taulí, Sabadell, Barcelona, España.,Departament de Medicina, Universitat Autònoma de Barcelona (UAB), Bellaterra, Barcelona, España
| | - Carolina Cisneros-Serrano
- Servicio de Neumología, Hospital Universitario La Princesa, Madrid, España.,Fundación de Investigación Biomédica La Princesa, Madrid, España
| | - Gregorio Soto-Campos
- Servicio de Neumología y Alergia, Hospital Universitario de Jerez, Jerez de la Frontera, Cádiz, España
| | - Berta Román-Bernal
- Neumología, Hospital Dr. José Molina Orosa, Arrecife, Las Palmas, España
| | - Francisco-Javier González-Barcala
- Servicio de Neumología, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, A Coruña, España.,Departamento de Medicina, Universidad de Santiago de Compostela, Santiago de Compostela, A Coruña, España.,Centro de Investigación Biomédica en Red de Enfermedades Respiratorias - CIBERES, Madrid, España.,Grupo Translational Research in Airway Diseases-FIDIS, Santiago de Compostela, A Coruña, España
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6
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Haahtela T. A biodiversity hypothesis. Allergy 2019; 74:1445-1456. [PMID: 30835837 DOI: 10.1111/all.13763] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 02/11/2019] [Accepted: 02/18/2019] [Indexed: 02/06/2023]
Abstract
Biodiversity hypothesis states that contact with natural environments enriches the human microbiome, promotes immune balance and protects from allergy and inflammatory disorders. We are protected by two nested layers of biodiversity, microbiota of the outer layer (soil, natural waters, plants, animals) and inner layer (gut, skin, airways). The latter inhabits our body and is colonized from the outer layer. Explosion of human populations along with cultural evolution is profoundly changing our environment and lifestyle. Adaptive immunoregulatory circuits and dynamic homeostasis are at stake in the newly emerged urban surroundings. In allergy, and chronic inflammatory disorders in general, exploring the determinants of immunotolerance is the key for prevention and more effective treatment. Loss of immunoprotective factors, derived from nature, is a new kind of health risk poorly acknowledged until recently. The paradigm change has been implemented in the Finnish allergy programme (2008-2018), which emphasized tolerance instead of avoidance. The first results are promising, as allergy burden has started to reduce. The rapidly urbanizing world is facing serious biodiversity loss with global warming, which are interconnected. Biodiversity hypothesis of health and disease has societal impact, for example, on city planning, food and energy production and nature conservation. It has also a message for individuals for health and well-being: take nature close, to touch, eat, breathe, experience and enjoy. Biodiverse natural environments are dependent on planetary health, which should be a priority also among health professionals.
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Affiliation(s)
- Tari Haahtela
- Skin and Allergy Hospital, Helsinki University Hospital University of Helsinki Helsinki Finland
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7
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Song Y, Khoo SK, Lee KH, Mäkelä M, Haahtela T, LeSouëf P, Zhang GB. Dual responses of CD14 methylation to distinct environments: a role in asthma and allergy. Eur Respir J 2017; 50:50/6/1701228. [PMID: 29242261 DOI: 10.1183/13993003.01228-2017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 09/17/2017] [Indexed: 11/05/2022]
Affiliation(s)
- Yong Song
- School of Public Health, Curtin University, Perth, Australia.,Centre for Genetic Origins of Health and Disease, The University of Western Australia and Curtin University, Perth, Australia
| | - Siew-Kim Khoo
- School of Paediatrics and Child Health, The University of Western Australia, Perth, Australia
| | - Khui Hung Lee
- School of Public Health, Curtin University, Perth, Australia.,Centre for Genetic Origins of Health and Disease, The University of Western Australia and Curtin University, Perth, Australia
| | - Mika Mäkelä
- Skin and Allergy Hospital, Helsinki University Central Hospital, Helsinki, Finland
| | - Tari Haahtela
- Skin and Allergy Hospital, Helsinki University Central Hospital, Helsinki, Finland
| | - Peter LeSouëf
- School of Paediatrics and Child Health, The University of Western Australia, Perth, Australia
| | - Guicheng Brad Zhang
- School of Public Health, Curtin University, Perth, Australia .,Centre for Genetic Origins of Health and Disease, The University of Western Australia and Curtin University, Perth, Australia.,School of Paediatrics and Child Health, The University of Western Australia, Perth, Australia
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8
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Khoo SK, Mäkelä M, Chandler D, Schultz EN, Jamieson SE, Goldblatt J, Haahtela T, LeSouëf P, Zhang G. No simple answers for the Finnish and Russian Karelia allergy contrast: Methylation of CD14 gene. Pediatr Allergy Immunol 2016; 27:721-727. [PMID: 27434019 DOI: 10.1111/pai.12612] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/04/2016] [Indexed: 11/30/2022]
Abstract
BACKGROUND Finnish and Russian Karelian children have a highly contrasting occurrence of asthma and allergy. In these two environments, we studied associations between total serum immunoglobulin E (IgE) with methylation levels in cluster of differentiation 14 (CD14). METHODS Five hundred Finnish and Russian Karelian children were included in four groups: Finnish children with high IgE (n = 126) and low IgE (n = 124) as well as Russian children with high IgE (n = 125) and low IgE (n = 125). DNA was extracted from whole blood cells and pyrosequenced. Three CpG sites were selected in the promoter region of CD14. RESULTS Methylation levels in two of the three CpG sites were higher in the Finnish compared to Russian Karelian children. In the promoter area of CD14, the Finnish compared to Russian children with low IgE had a significant (p < 0.0001) increase in methylation levels at the Amp5Site 2. Likewise, the Finnish compared to Russian children with high IgE had a significant (p = 0.003) increase in methylation levels at the Amp5Site 3. In Russian children with low vs. high IgE, there were significant differences in methylation levels, but this was not the case on the Finnish side. In the regression analysis, adding the methylation variation of CD14 to the model did not explain the higher asthma and allergy risk in the Finnish children. CONCLUSIONS The methylation levels in the promoter region of CD14 gene were higher in the Finnish compared to Russian Karelian children. However, the methylation variation of this candidate gene did not explain the asthma and allergy contrast between these two areas.
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Affiliation(s)
- Siew-Kim Khoo
- School of Paediatrics and Child Health, The University of Western Australia, Perth, WA, Australia.
| | - Mika Mäkelä
- Skin and Allergy Hospital, Helsinki University Central Hospital, Helsinki, Finland
| | - David Chandler
- Australian Genome Research Facility Ltd, Perth, WA, Australia
| | - En Nee Schultz
- School of Paediatrics and Child Health, The University of Western Australia, Perth, WA, Australia
| | - Sarra E Jamieson
- Telethon Kids Institute, Centre for Child Health Research, The University of Western Australia, Perth, WA, Australia
| | - Jack Goldblatt
- Genetic Services & Familial Cancer Program of Western Australia, King Edward Memorial Hospital for Women, Perth, WA, Australia
| | - Tari Haahtela
- Skin and Allergy Hospital, Helsinki University Central Hospital, Helsinki, Finland
| | - Peter LeSouëf
- School of Paediatrics and Child Health, The University of Western Australia, Perth, WA, Australia
| | - Guicheng Zhang
- School of Paediatrics and Child Health, The University of Western Australia, Perth, WA, Australia. .,Telethon Kids Institute, Centre for Child Health Research, The University of Western Australia, Perth, WA, Australia. .,School of Public Health, Curtin University, Perth, WA, Australia. .,Centre for Genetic Origins of Health and Disease, Curtin University and the University of Western Australia, Perth, WA, Australia.
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Einarsdottir E, Hafrén L, Leinonen E, Bhutta MF, Kentala E, Kere J, Mattila PS. Genome-wide association analysis reveals variants on chromosome 19 that contribute to childhood risk of chronic otitis media with effusion. Sci Rep 2016; 6:33240. [PMID: 27632927 PMCID: PMC5025747 DOI: 10.1038/srep33240] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 08/22/2016] [Indexed: 02/07/2023] Open
Abstract
To identify genetic risk factors of childhood otitis media (OM), a genome-wide association study was performed on Finnish subjects, 829 affected children, and 2118 randomly selected controls. The most significant and validated finding was an association with an 80 kb region on chromosome 19. It includes the variants rs16974263 (P = 1.77 × 10(-7), OR = 1.59), rs268662 (P = 1.564 × 10(-6), OR = 1.54), and rs4150992 (P = 3.37 × 10(-6), OR = 1.52), and harbors the genes PLD3, SERTAD1, SERTAD3, HIPK4, PRX, and BLVRB, all in strong linkage disequilibrium. In a sub-phenotype analysis of the 512 patients with chronic otitis media with effusion, one marker reached genome-wide significance (rs16974263, P = 2.92 × 10(-8)). The association to this locus was confirmed but with an association signal in the opposite direction, in a UK family cohort of 4860 subjects (rs16974263, P = 3.21 × 10(-4), OR = 0.72; rs4150992, P = 1.62 × 10(-4), OR = 0.71). Thus we hypothesize that this region is important for COME risk in both the Finnish and UK populations, although the precise risk variants or haplotype background remain unclear. Our study suggests that the identified region on chromosome 19 includes a novel and previously uncharacterized risk locus for OM.
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Affiliation(s)
- Elisabet Einarsdottir
- Folkhälsan Institute of Genetics, and Molecular Neurology Research Program, University of Helsinki, Helsinki, Finland.,Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden
| | - Lena Hafrén
- Folkhälsan Institute of Genetics, and Molecular Neurology Research Program, University of Helsinki, Helsinki, Finland.,Department of Otorhinolaryngology, Helsinki University Hospital, Helsinki, Finland
| | - Eira Leinonen
- Folkhälsan Institute of Genetics, and Molecular Neurology Research Program, University of Helsinki, Helsinki, Finland
| | | | - Erna Kentala
- Department of Otorhinolaryngology, Helsinki University Hospital, Helsinki, Finland
| | - Juha Kere
- Folkhälsan Institute of Genetics, and Molecular Neurology Research Program, University of Helsinki, Helsinki, Finland.,Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden
| | - Petri S Mattila
- Department of Otorhinolaryngology, Helsinki University Hospital, Helsinki, Finland
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10
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Thomsen SF. The contribution of twin studies to the understanding of the aetiology of asthma and atopic diseases. Eur Clin Respir J 2015; 2:27803. [PMID: 26672957 PMCID: PMC4653279 DOI: 10.3402/ecrj.v2.27803] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Accepted: 08/11/2015] [Indexed: 01/17/2023] Open
Abstract
The prevalence of asthma and other atopic diseases has increased markedly during the past decades and the reasons for this are not fully understood. Asthma is still increasing in many parts of the world, notably in developing countries, and this emphasizes the importance of continuing research aimed at studying the aetiological factors of the disease and the causes of its increase in prevalence. Twin studies enable investigations into the genetic and environmental causes of individual variation in multifactorial diseases such as asthma. Thorough insight into these causes is important as this will ultimately guide the development of preventive strategies and targeted therapies. This review explores the contribution of twin studies to the understanding of the aetiology of asthma and atopic diseases.
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Affiliation(s)
- Simon F Thomsen
- Department of Respiratory Medicine, Bispebjerg Hospital, Copenhagen, Denmark;
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Haahtela T, Laatikainen T, Alenius H, Auvinen P, Fyhrquist N, Hanski I, von Hertzen L, Jousilahti P, Kosunen TU, Markelova O, Mäkelä MJ, Pantelejev V, Uhanov M, Zilber E, Vartiainen E. Hunt for the origin of allergy - comparing the Finnish and Russian Karelia. Clin Exp Allergy 2015; 45:891-901. [DOI: 10.1111/cea.12527] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Revised: 01/13/2015] [Accepted: 01/16/2015] [Indexed: 12/12/2022]
Affiliation(s)
- T. Haahtela
- Skin and Allergy Hospital; Helsinki University Central Hospital; Helsinki Finland
| | - T. Laatikainen
- National Institute for Health and Welfare; Helsinki Finland
- Institute of Public Health and Clinical Nutrition; University of Eastern Finland; Helsinki Finland
| | - H. Alenius
- Institute of Occupational Health; Helsinki Finland
| | - P. Auvinen
- Institute of Biotechnology; University of Helsinki; Helsinki Finland
| | - N. Fyhrquist
- Institute of Occupational Health; Helsinki Finland
| | - I. Hanski
- Department of Biosciences; University of Helsinki; Helsinki Finland
| | - L. von Hertzen
- Skin and Allergy Hospital; Helsinki University Central Hospital; Helsinki Finland
| | - P. Jousilahti
- National Institute for Health and Welfare; Helsinki Finland
| | - T. U. Kosunen
- Department of Bacteriology and Immunology; Haartman Institute; University of Helsinki; Helsinki Finland
| | - O. Markelova
- Petrozavodsk State University; Petrozavodsk Russia
| | - M. J. Mäkelä
- Skin and Allergy Hospital; Helsinki University Central Hospital; Helsinki Finland
| | | | - M. Uhanov
- Parliament of the Republic of Karelia; Petrozavodsk Russia
| | - E. Zilber
- Scientific Research Institute of Phthisiopulmonology; St. Petersburg Russia
| | - E. Vartiainen
- National Institute for Health and Welfare; Helsinki Finland
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Abstract
This thesis explores the contribution of twin studies, particularly those studies originating from the Danish Twin Registry, to the understanding of the aetiology of asthma. First, it is explored how twin studies have established the contribution of genetic and environmental factors to the variation in the susceptibility to asthma, and to the variation in several aspects of the clinical expression of the disease such as its age at onset, its symptomatology, its intermediate phenotypes, and its relationship with other atopic diseases. Next, it is explored how twin studies have corroborated theories explaining asthma's recent increase in prevalence, and last, how these fit with the explanations of the epidemiological trends in other common chronic diseases of modernity.
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Zhao G, Lin X, Zhou M, Zhao J. Association between CC10 +38A/G polymorphism and asthma risk: A meta-analysis. Pak J Med Sci 2014; 29:1439-43. [PMID: 24550970 PMCID: PMC3905370 DOI: 10.12669/pjms.296.3724] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 09/04/2013] [Accepted: 09/06/2013] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVES A number of studies conducted to assess the association between Clara cell 10-kDa protein (CC10) +38A/G polymorphism and susceptibility to asthma have yielded inconsistent and inconclusive results. In the present study, the possible association was assessed by a meta-analysis. METHODS Relevant articles were identified for the period ranging from Jan 1998 up to March 2013. Pooled odds ratios (OR) with 95% confidence intervals (CI) were appropriately derived from fixed effects or random-effects models. RESULTS Ten case-control studies with a total of 1529 asthma cases and 2399 controls were included in this meta-analysis. The association between CC10 +38A/G polymorphism and asthma risk was determined in dominant model, recessive model, additive model, and codominant model. In dominant model, CC10 +38A/G polymorphism seemed to be associated with elevated asthma risk (OR = 1.62; 95% CI, 1.23-2.12; P = 0.0005). Subgroup analyses by ethnicity also found significant associations between this polymorphism and asthma risk in Asians and Caucasians. RESULTS from other genetic models further identified this possible association. CONCLUSION This meta-analysis suggests that CC10 +38A/G polymorphism confers asthma risk.
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Affiliation(s)
- Guangri Zhao
- Guangri Zhao, Department of Chest Surgery, Department of Chest Surgery, Guangzhou Medical University Cancer Institute and Hospital, Guangzhou, China
| | - Xiaodan Lin
- Xiaodan Lin, Department of Radiotherapy, Guangzhou Medical University Cancer Institute and Hospital, Guangzhou, China
| | - Ming Zhou
- Ming Zhou, Department of Chest Surgery, Guangzhou Medical University Cancer Institute and Hospital, Guangzhou, China
| | - Jian Zhao
- Jian Zhao, Guangzhou Medical University Cancer Institute and Hospital, Guangzhou, China
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Zhang G, Khoo SK, Mäkelä MJ, Candelaria P, Hayden CM, von Hertzen L, Laatikainen T, Vartiainen E, Goldblatt J, Haahtela T, LeSouëf PN. Maternal Genetic Variants of IL4/IL13 Pathway Genes on IgE With "Western or Eastern Environments/Lifestyles". ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2014; 6:350-6. [PMID: 24991459 PMCID: PMC4077962 DOI: 10.4168/aair.2014.6.4.350] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Revised: 09/19/2013] [Accepted: 09/30/2013] [Indexed: 12/26/2022]
Abstract
Purpose We investigated maternal genetic effects of four IL-4/IL-13 pathway genes as well as their interactions with the "Western or Eastern lifestyles/environments" on IgE in Karelian children. Methods This study included 609 children and their mothers. Total IgE levels in children and mothers were measured and 10 single nucleotide polymorphisms (SNPs) in IL-4, IL-4Ra, IL-13, and STAT6 were genotyped in mothers and their children. Results The maternal G allele of IL-13 130 (rs20541) was significantly (P=0.001) associated with decreased IgE in children in the Karelian population (Pooling Finnish and Russian children), as well as in Finnish (P=0.030) and Russian children (P=0.018). The IgE levels were significantly (P=0.001) higher in Russian children whose mothers were homozygous for the G allele of the IL-4Ra 50 (rs1805010) SNP than that in Russian children of mothers who were AG heterozygotes or AA homozygotes. After accounting for children's genotypes, we observed interactive effects on children's IgE for maternal IL-13 130 genotypes (P=0.014) and maternal IL-4Ra 50 genotypes (P=0.0003) with "Western or Eastern" lifestyles/environments. With the adjustment for multiple comparisons using a false discovery rate (FDR) of 0.05, the interactive effect of the maternal IL-4Ra50 SNP was significant. Conclusion Maternal genetic variants in IL-4/IL-13 pathway genes, such as IL-13 130 and IL-4Ra50, influenced IgE levels in school children that were independent of the children's genetic effects. These effects differ in "Western or Eastern" environments.
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Affiliation(s)
- Guicheng Zhang
- School of Paediatrics and Child Health, University of Western Australia, Australia. ; School of Public Health, Curtin University, Perth, Australia
| | - Siew-Kim Khoo
- School of Paediatrics and Child Health, University of Western Australia, Australia
| | - Mika J Mäkelä
- Skin and Allergy Hospital, Helsinki University Central Hospital, Helsinki, Finland
| | - Pierre Candelaria
- School of Paediatrics and Child Health, University of Western Australia, Australia
| | - Catherine M Hayden
- School of Paediatrics and Child Health, University of Western Australia, Australia
| | - Leena von Hertzen
- Skin and Allergy Hospital, Helsinki University Central Hospital, Helsinki, Finland
| | - Tiina Laatikainen
- National Institute for Health and Welfare, Department of Chronic Disease Prevention, Helsinki, Finland
| | - Erkki Vartiainen
- National Institute for Health and Welfare, Department of Chronic Disease Prevention, Helsinki, Finland
| | - Jack Goldblatt
- School of Paediatrics and Child Health, University of Western Australia, Australia. ; Genetic Services of WA, King Edward Memorial Hospital, Perth, Australia
| | - Tari Haahtela
- Skin and Allergy Hospital, Helsinki University Central Hospital, Helsinki, Finland
| | - Peter N LeSouëf
- School of Paediatrics and Child Health, University of Western Australia, Australia
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15
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Nie W, Xue C, Chen J, Xiu Q. Secretoglobin 1A member 1 (SCGB1A1) +38A/G polymorphism is associated with asthma risk: A meta-analysis. Gene 2013; 528:304-8. [DOI: 10.1016/j.gene.2013.06.049] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2013] [Revised: 06/05/2013] [Accepted: 06/24/2013] [Indexed: 11/29/2022]
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Gonzalez-Barcala F, Pertega S, Perez-Castro T, Sampedro M, Sanchez-Lastres J, San-Jose-Gonzalez M, Bamonde L, Garnelo L, Valdés-Cuadrado L, Moure J, Carreira J, Lopez-Silvarrey A. Obesity and asthma: an association modified by age. Allergol Immunopathol (Madr) 2013; 41:176-80. [PMID: 23266140 DOI: 10.1016/j.aller.2012.05.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Accepted: 05/22/2012] [Indexed: 12/31/2022]
Abstract
BACKGROUND Some studies indicate some causal relationship between obesity and asthma, while others show inconsistent results. Our objective was to evaluate the prevalence of asthma according to obesity in children. METHODS A cross-sectional study, following the ISAAC study methodology, was conducted on two randomly selected groups consisting of 6-7 year-old children (n=7485) and 13-14 year-old adolescents (n=8496). The asthma symptoms and potential risk factors were determined from the questionnaire. Overweight and obesity were defined based on the body mass index. Multiple logistic regression was used to obtain adjusted prevalence odds ratios (OR) and 95% confidence intervals. RESULTS Obesity was associated with an increase in wheezing ever (OR: 1.35) and exercise-induced asthma (OR: 1.62) in the 6-7 year-old group. No significant relationship was observed in the adolescent population. CONCLUSION Obesity was associated with a higher prevalence of asthma in young children, but not in adolescents.
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Gonzalez-Barcala FJ, Aboal-Viñas J, Aira MJ, Regueira-Méndez C, Valdes-Cuadrado L, Carreira J, Garcia-Sanz MT, Takkouche B. Influence of pollen level on hospitalizations for asthma. ARCHIVES OF ENVIRONMENTAL & OCCUPATIONAL HEALTH 2013; 68:66-71. [PMID: 23428055 DOI: 10.1080/19338244.2011.638950] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The effect of pollen level on asthma hospitalizations is still under debate. The aim of this study was to analyze hospital admissions due to asthma and its relation with environmental pollen and meteorological factors. During 13 years, we included every patient admitted with asthma as primary or secondary diagnosis. For this purpose, we used a case-crossover analysis to compare pollen concentrations at the time of admission with values of the same variables 2 to 6 days before admission. We included 6,687 hospital admissions. High maximum temperature and low humidity were associated with lower risk of asthma admissions. High mean pollen levels exerted a moderate effect and high maximum pollen levels led to a dramatic increase of hospital admissions due to asthma, especially among females. In conclusion, environmental pollen level increases the risk of asthma hospital admissions.
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Affiliation(s)
- F J Gonzalez-Barcala
- Department of Respiratory Diseases, University Hospital of Santiago de Compostela, Santiago de Compostela, Spain.
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18
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Kim WK, Kwon JW, Seo JH, Kim HY, Yu J, Kim BJ, Kim HB, Lee SY, Kim KW, Kang MJ, Shin YJ, Hong SJ. Interaction between IL13 genotype and environmental factors in the risk for allergic rhinitis in Korean children. J Allergy Clin Immunol 2012; 130:421-6.e5. [PMID: 22846750 DOI: 10.1016/j.jaci.2012.04.052] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2011] [Revised: 04/19/2012] [Accepted: 04/23/2012] [Indexed: 10/28/2022]
Abstract
BACKGROUND The prevalence of allergic rhinitis (AR) is increasing worldwide. Allergic diseases develop in susceptible subjects when they are exposed to specific environmental factors. OBJECTIVE We analyzed changes in the prevalence of AR and identified genetic and environmental factors in early childhood that affect risk. METHODS We used the International Study of Asthma and Allergies in Childhood questionnaire to collect data on AR, allergies, and environmental exposures from 4554 elementary school students from 5 areas of Seoul, Korea, in 2008. We also obtained DNA from 1050 subjects from 1 area of Seoul for genotype analysis of IL13. RESULTS We identified genetic and environmental factors during infancy and early childhood that increased the risk for current AR (resulting in a diagnosis of AR and AR symptoms in the past 12 months) in elementary school-aged children. These included allergic disease in parents and antibiotic use in infants, allergic disease in parents and exposure of infants to mold, and allergic disease in parents and moving an infant to a newly built house. The risk of current AR also increased in subjects with GA or AA at nucleotide 2044 in IL13 who had been exposed to mold in the home during infancy (adjusted odds ratio, 3.27; 95% CI, 1.75-6.11) compared with subjects who had GG at this position and had not been exposed to mold (adjusted odds ratio, 3.27; 95% CI, 1.75-6.11). CONCLUSION The prevalence of AR is increasing in Korean children. Children with a family history of allergic disease and exposure to specific environmental risk factors during infancy are more likely to have AR. Children with GA or AA at IL13(+2044) are at increased risk for AR when exposed to mold in the home during the first year of life.
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Affiliation(s)
- Woo Kyung Kim
- Department of Pediatrics, Inje University Seoul Paik Hospital, Seoul, Korea
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Rogers A, Bunyavanich S. Unravelling gene-by-environment effects in asthma and allergy: the glutathione pathway as an early success story. Clin Exp Allergy 2012; 41:1502-4. [PMID: 22093009 DOI: 10.1111/j.1365-2222.2011.03844.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Interleukin-10 (IL-10) polymorphisms are associated with IL-10 production and clinical malaria in young children. Infect Immun 2012; 80:2316-22. [PMID: 22566507 DOI: 10.1128/iai.00261-12] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The role of interleukin-10 (IL-10) in malaria remains poorly characterized. The aims of this study were to investigate (i) whether genetic variants of the IL-10 gene influence IL-10 production and (ii) whether IL-10 production as well as the genotypes and haplotypes of the IL-10 gene in young children and their mothers are associated with the incidence of clinical malaria in young children. We genotyped three IL-10 single nucleotide polymorphisms in 240 children and their mothers from a longitudinal prospective cohort and assessed the IL-10 production by maternal peripheral blood mononuclear cells (PBMCs) and cord blood mononuclear cells (CBMCs). Clinical episodes of Plasmodium falciparum malaria in the children were documented until the second year of life. The polymorphism IL-10 A-1082G (GCC haplotype of three SNPs in IL-10) in children was associated with IL-10 production levels by CBMC cultured with P. falciparum-infected erythrocytes (P = 0.043), with the G allele linked to low IL-10 production capacity. The G allele in children was also significantly associated with a decreased risk for clinical malaria infection in their second year of life (P = 0.016). Furthermore, IL-10 levels measured in maternal PBMCs cultured with infected erythrocytes were associated with increased risk of malaria infection in young children (P < 0.001). In conclusion, IL-10 polymorphisms and IL-10 production capacity were associated with clinical malaria infections in young children. High IL-10 production capacity inherited from parents may diminish immunological protection against P. falciparum infection, thereby being a risk for increased malaria morbidity.
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Antó JM, Pinart M, Akdis M, Auffray C, Bachert C, Basagaña X, Carlsen KH, Guerra S, von Hertzen L, Illi S, Kauffmann F, Keil T, Kiley JP, Koppelman GH, Lupinek C, Martinez FD, Nawijn MC, Postma DS, Siroux V, Smit HA, Sterk PJ, Sunyer J, Valenta R, Valverde S, Akdis CA, Annesi-Maesano I, Ballester F, Benet M, Cambon-Thomsen A, Chatzi L, Coquet J, Demoly P, Gan W, Garcia-Aymerich J, Gimeno-Santos E, Guihenneuc-Jouyaux C, Haahtela T, Heinrich J, Herr M, Hohmann C, Jacquemin B, Just J, Kerkhof M, Kogevinas M, Kowalski ML, Lambrecht BN, Lau S, Lødrup Carlsen KC, Maier D, Momas I, Noel P, Oddie S, Palkonen S, Pin I, Porta D, Punturieri A, Rancière F, Smith RA, Stanic B, Stein RT, van de Veen W, van Oosterhout AJM, Varraso R, Wickman M, Wijmenga C, Wright J, Yaman G, Zuberbier T, Bousquet J. Understanding the complexity of IgE-related phenotypes from childhood to young adulthood: a Mechanisms of the Development of Allergy (MeDALL) seminar. J Allergy Clin Immunol 2012; 129:943-54.e4. [PMID: 22386796 DOI: 10.1016/j.jaci.2012.01.047] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Revised: 12/22/2011] [Accepted: 01/12/2012] [Indexed: 12/18/2022]
Abstract
Mechanisms of the Development of Allergy (MeDALL), a Seventh Framework Program European Union project, aims to generate novel knowledge on the mechanisms of initiation of allergy. Precise phenotypes of IgE-mediated allergic diseases will be defined in MeDALL. As part of MeDALL, a scientific seminar was held on January 24, 2011, to review current knowledge on the IgE-related phenotypes and to explore how a multidisciplinary effort could result in a new integrative translational approach. This article provides a summary of the meeting. It develops challenges in IgE-related phenotypes and new clinical and epidemiologic approaches to the investigation of allergic phenotypes, including cluster analysis, scale-free models, candidate biomarkers, and IgE microarrays; the particular case of severe asthma was reviewed. Then novel approaches to the IgE-associated phenotypes are reviewed from the individual mechanisms to the systems, including epigenetics, human in vitro immunology, systems biology, and animal models. The last chapter deals with the understanding of the population-based IgE-associated phenotypes in children and adolescents, including age effect in terms of maturation, observed effects of early-life exposures and shift of focus from early life to pregnancy, gene-environment interactions, cohort effects, and time trends in patients with allergic diseases. This review helps to define phenotypes of allergic diseases in MeDALL.
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Affiliation(s)
- Josep M Antó
- Centre for Research in Environmental Epidemiology, Barcelona, Spain.
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Abstract
PURPOSE OF REVIEW To describe currently available epidemiological data on the prevalence of allergic conjunctivitis. Allergic conjunctivitis is often underdiagnosed and consequently undertreated except when it is severe and the chief complaint of a consultation in a specialty clinic. Use of healthcare resources and reduced quality of life of affected individuals justify studies on the prevalence of allergic conjunctivitis. RECENT FINDINGS The association of allergic nasal and ocular symptoms (rhinoconjunctivitis) is common. Most children with allergic conjunctivitis have allergic rhinitis. Older population studies estimate a prevalence of 15-20% of allergic conjunctivitis, but more recent studies implicate rates as high as 40%. Ocular symptoms are common and contribute to the burden of allergic rhinitis and lower quality of life. Ocular allergies rank a very close second and at times may overcome the primary complaints of nasal congestion in rhinoconjunctivitis patients. SUMMARY Little focus has been set on the impact of allergic conjunctivitis as comorbidity to asthma and rhinitis in atopic patients. Conjunctivitis symptoms are at least as severe as rhinitis symptoms in patients with 'hay fever' and some have even generated the term of conjunctivorhinitis stressing the ocular symptoms. Prevalence studies should be specifically addressed to ocular allergy symptoms.
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Rigoli L, Briuglia S, Caimmi S, Ferraú V, Gallizzi R, Leonardi S, La Rosa M, Salpietro C. Gene-environment interaction in childhood asthma. Int J Immunopathol Pharmacol 2011; 24:41-7. [PMID: 22032786 DOI: 10.1177/03946320110240s409] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The importance of early life environmental influences on the etiology of asthma is implied by the observed geographic and temporal variation in the prevalence of the disease among children. There is evidence pointing to the role of exposure to allergen, various aspects of diet and hygiene-related factors in the etiology of asthma. There is also evidence that heritable factors influence the impact of hygiene-related exposures on the risk of having asthma. A number of important gene-environment interactions have been identified. These interactions point to the biology of environmental exposures as the involved genetic variation is suggestive of certain underlying mechanisms. Polymorphisms within genes coding for the toll-like receptor-lipopolysaccharide (TLR-LPS) signalling pathway may underlie variations in effects of hygiene-related exposures, including specifically endotoxin, on the risk of developing allergic sensitization and allergic disease. This review presents recent findings illustrating the role of gene-environment interactions in childhood asthma susceptibility.
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Affiliation(s)
- L Rigoli
- Department of Pediatrics, Unit of Pediatric Genetics and Immunology, University of Messina, Italy.
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24
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Zhang G, Candelaria P, Mäkelä JM, Khoo SK, Hayden MC, von Hertzen L, Laatikainen T, Vartiainen E, Goldblatt J, Haahtela T, LeSouëf NP. Disparity of innate immunity-related gene effects on asthma and allergy on Karelia. Pediatr Allergy Immunol 2011; 22:621-30. [PMID: 21749458 DOI: 10.1111/j.1399-3038.2011.01186.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND We investigated the interactive effects of 11 innate immunity-related genes (IL10, IL12b, IL8, TLR2, TLR4, CD14, IFNGR, CC16, IFNg, CMA1, and TGFB) and four IgE response genes (IL4, IL13, IL4RA, and STAT6) with 'Western' or 'Eastern' environments/lifestyles on asthma and allergy in Karelian children. METHODS Karelian children (412 Finnish and 446 Russian) were recruited and assessed for a range of allergic conditions, with 24 single-nucleotide polymorphisms genotyped in 15 genes. RESULTS The genotype-phenotype relationships differed in Finnish and Russian Karelian children. The interaction between polymorphisms and the variable representing 'Western' and 'Eastern' environments/ lifestyles was significant for IL10-1082 (p = 0.0083) on current rhinitis, IL12b 6408 on current conjunctivitis (p = 0.016) and atopy (p = 0.034), IL8 781 on atopic eczema (p = 0.0096), CD14 -550 on current rhinitis (p = 0.022), IFNgR1 -56 on atopic eczema(p = 0.038), and STAT6 2964 on current itchy rash (p = 0.037) and total serum IgE (p = 0.042). In addition, the G allele of IL13 130 was associated with a lower level of total serum IgE in Finnish (p = 0.003) and Russian (p = 0.01) children and overall (pooling the two populations together, p = 0.00006). After adjusting for multiple tests, the association between IL13 130 and IgE and the interactive effects of IL10-1082 on current rhinitis and IL8 781 on atopic eczema were significant by controlling a false-positive rate of 0.05 and 0.10, respectively. CONCLUSIONS Living in an Eastern vs. Western environment was associated with a different genetic profile associated with asthma and allergy in the Karelian populations.
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Affiliation(s)
- Guicheng Zhang
- School of Paediatrics and Child Health, University of Western Australia, Perth, WA, Australia.
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Barcala JG, Portal JAR, Carmona MJC, González CM. [Exposure to environmental contaminants and respiratory disease. Spotlight on the year 2009]. Arch Bronconeumol 2011; 46 Suppl 1:17-20. [PMID: 20353844 DOI: 10.1016/s0300-2896(10)70005-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The continued inhalation of contaminants present in the air that we breathe is a common cause of respiratory disease. Classically, this exposure-disease relationship has been proved in the workplace and as a cause of specific diseases such as pneumoconiosis and occupational asthma. However, there is increasing evidence indicating an association between occupational exposure and other more prevalent respiratory diseases such as Chronic Obstructive Pulmonary Disease and lung cancer. The effect of contamination is also observed outside the workplace. The air in cities can contribute to increasing the morbidity and mortality due to chronic respiratory diseases. Some articles published during the year 2009 that have a bearing on aspects associated with respiratory diseases of occupational or environmental origin are reviewed below.
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Zhang G, Goldblatt J, Lesouëf P. Findings in genome-wide association studies on asthma lack generalisation. CLINICAL RESPIRATORY JOURNAL 2011; 4:e8-9. [PMID: 20887339 DOI: 10.1111/j.1752-699x.2010.00213.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Guicheng Zhang
- School of Paediatrics and Child Health, Faculty of Medicine, Faculty of Medicine and Dentistry, The University of Western Australia, Perth, Australia
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Ku MS, Sun HL, Lu KH, Sheu JN, Lee HS, Yang SF, Lue KH. The CC16 A38G polymorphism is associated with the development of asthma in children with allergic rhinitis. Clin Exp Allergy 2011; 41:794-800. [PMID: 21255142 DOI: 10.1111/j.1365-2222.2010.03679.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Although asthma and allergic rhinitis (AR) are considered to be one syndrome, many questions remain unanswered. Why do some AR patients develop asthma but others do not, and which factors play a role in the development of asthma that have so far not been clearly elucidated. OBJECTIVE We hypothesize that children with AR who have the Clara cell secretory protein (CC16, secretoglobin 1A1) 38A/38A genotype (rs3741240) have an increased likelihood of developing asthma. METHODS The study sample included 117 children, with AR, but no asthma diagnosed within the following 5 years, as the control group. Cases group (n=202) included age- and gender-matched children with AR first, and asthma developed 3-5 years later, as the study group. The CC16 genotype was determined by PCR and Sau96I restriction digestion of PCR products. The serum CC16 levels were measured by ELISA. Total serum IgE, allergen specific IgE, eosinophil count and pulmonary function were also measured. RESULTS In children with rhinitis who develop asthma, the frequencies of the AA genotype were significantly higher than those who did not develop asthma [odds ratio (OR)=2.527; 95% confidence interval (CI)=1.571-4.065; P<0.01]. Serum CC16 levels in the children with rhinitis who develop asthma and carry the AA genotype were significantly lower than those who carry the non-AA genotype and those who did not develop asthma. CONCLUSIONS AND CLINICAL RELEVANCE Results of this study suggest that CC16 38A/38A genotype plays a role in the development of early asthma in children with AR. Early identification of rhinitis children at risk may assist in designing preventative approach to asthma development.
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Affiliation(s)
- M-S Ku
- Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
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Baye TM, Abebe T, Wilke RA. Genotype-environment interactions and their translational implications. Per Med 2011; 8:59-70. [PMID: 21660115 PMCID: PMC3108095 DOI: 10.2217/pme.10.75] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Organisms frequently encounter different environmental conditions. The physiological and behavioral responses to these conditions depend on the genetic make up of individuals. Genotype generally remains constant from one environment to another, although occasional spontaneous mutations may occur which cause it to change. However, when the same genotype is subjected to different environments, it can produce a wide range of phenotypes. These phenotypic variations are attributable to the effect of the environment on the expression and function of genes influencing the trait. Changes in the relative performance of genotypes across different environments are referred to as genotype-environment interactions (GEI). A general argument for research on the impact of GEI in common diseases is that it provides insights into disease processes at the population, individual and molecular levels. In humans, GEI is complicated by multiple factors including phenocopies, genocopies, epigenetics and imprinting. A better understanding of GEI is essential if patients are to make informed health choices guided by their genomic information. In this article, we clarify the role of the environment on phenotype, we describe how human population structure can obscure the resolution of GEI and we discuss how emerging biobanks across the globe can be coordinated to further our understanding of genotype-phenotype associations within the context of varying environment.
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Affiliation(s)
- Tesfaye M Baye
- Cincinnati Children’s Hospital Medical Center, Division of Asthma Research, Department of Pediatrics, University of Cincinnati, Cincinnati, OH, USA
| | - Tilahun Abebe
- Department of Biology, University of Northern Iowa, Cedar Falls, IA, USA
| | - Russell A Wilke
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
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Gene-environment interactions in asthma and allergy: the end of the beginning? Curr Opin Allergy Clin Immunol 2010; 10:145-8. [PMID: 20051845 DOI: 10.1097/aci.0b013e32833653d7] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
PURPOSE OF REVIEW The pathogenesis of asthma and allergy typically involves not only distinct genetic and environmental factors, but also interactions between the two. Innate-immunity genes [particularly CD14, toll-like receptor (TLR)4 and TLR2, the critical mediators of responses to bacteria in the extracellular space] play a prominent role in gene-environment interactions relevant to asthma-related phenotypes because the interaction between microbial load and the innate-immune system is a critical determinant of both immune function and allergy/asthma susceptibility. This review presents recent findings illustrating the role of gene-environment interactions in asthma/allergy susceptibility. RECENT FINDINGS Population studies have extended our understanding of the role of CD14 and innate-immune genes in the interplay between genetic variants and the environment, highlighting the complexity of these interactions and their significant influence on susceptibility to asthma and allergy. SUMMARY Gene-environment interactions have become a leitmotiv in asthma and allergy genetics, especially over the last 3 years. The next challenge awaiting asthma and allergy geneticists will be to define the extent to which the search for gene-environment interactions can be successfully integrated with hypothesis-generating, genome-wide approaches aimed at the identification of genetic variants involved in the pathogenesis of complex-lung diseases.
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Seiskari T, Viskari H, Kondrashova A, Haapala AM, Ilonen J, Knip M, Hyöty H. Co-occurrence of allergic sensitization and type 1 diabetes. Ann Med 2010; 42:352-9. [PMID: 20465355 DOI: 10.3109/07853890.2010.481678] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND The mechanisms leading to abnormal immune regulation in type 1 diabetes and allergic diseases may be partly overlapping. If so, these diseases should co-occur more often than expected. We investigated this phenomenon in two contrasting socio-economic environments, Finland and Russian Karelia. METHODS We screened 413 Finnish children (of whom 147 had type 1 diabetes) and 244 Russian Karelian children (132 had type 1 diabetes) for total immunoglobulin E (IgE) levels and specific IgE against birch, cat, and egg albumen. In addition we analysed diabetes-related human leukocyte antigen (HLA) haplotypes and antibodies against hepatitis A virus (HAV) and recorded allergic diseases by a questionnaire in Russian Karelia. RESULTS In Russian Karelia 15% of the patients with type 1 diabetes, but only 4% of the control subjects had allergen-specific IgE (P = 0.012). A similar difference was observed in the frequency of allergic symptoms. Co-occurrence of allergic sensitization and type 1 diabetes was associated with lack of HAV antibodies and was not seen in Finland where infections are less frequent than in Karelia. CONCLUSION Our findings support the idea of common mechanisms in the pathogenesis of allergic diseases and type 1 diabetes, which may be particularly important in an environment with low penetrance of these diseases.
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Affiliation(s)
- Tapio Seiskari
- Department of Virology, University of Tampere, Tampere, Finland.
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Hancox RJ, Le Souëf PN, Anderson GP, Reddel HK, Chang AB, Beasley R. Asthma: time to confront some inconvenient truths. Respirology 2010; 15:194-201. [PMID: 20199640 DOI: 10.1111/j.1440-1843.2009.01700.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Despite major advances in the understanding of the pathogenesis of asthma and improvements in management, the accompanying benefits from public health initiatives and clinical practice have arguably been less than expected. For example, there are no effective public health strategies or treatment regimes that reduce the risk of developing asthma or influence its natural history. These represent priority areas for future translational research, which would need to investigate genetic and environmental interactions and vaccine strategies. In terms of asthma management it is tempting to focus on novel drug therapies; however, a case can be made that the priority is to undertake research that leads to improvements in the use of existing treatments through public health and primary care initiatives. Guidelines represent an important component of this approach, with recommendations for asthma imbedded within respiratory guidelines that can be implemented in the developing world where other acute and chronic respiratory disorders are common. This approach offers the best opportunity to close the gap between what is currently achieved in asthma management and that which is potentially achievable.
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Affiliation(s)
- Robert J Hancox
- Department of Preventive and Social Medicine, University of Otago, Dunedin, New Zealand
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Candelaria PV, Backer V, Khoo SK, Bizzintino JA, Hayden CM, Baynam G, Laing IA, Zhang G, Porsbjerg C, Goldblatt J, Le Souëf PN. The importance of environment on respiratory genotype/phenotype relationships in the Inuit. Allergy 2010; 65:229-37. [PMID: 19796192 DOI: 10.1111/j.1398-9995.2009.02145.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Genetic and environmental influences and their interactions are central to asthma pathogenesis. This study aimed to investigate the effects of different macro-environments on asthma genotype-phenotype associations in two geographically separated populations with common ancestry. METHODS To accomplish this, two unselected populations of Inuit were recruited, one living in Greenland (n = 618) and the other in Denmark (n = 739). Subjects were genotyped for CD14 C-159T, SCGB1A1 A38G, ADRB2 Arg16Gly and Gln27Glu. The resulting genetic data were analysed for relationships with asthma-related parameters including lung function, ever asthma, atopy, rhinitis and dermatitis. RESULTS The results showed contrasting magnitude and direction of genetic associations between the two geographically separate Inuit populations. In Greenland, the ADRB2 16Arg allele was associated with male-specific lower lung function, but in Denmark the same allele was associated with male-specific higher lung function. This allele was also associated with higher incidence of ever asthma in Denmark but not in Greenland. The SCGB1A1 38A allele was associated with lower rhinitis prevalence in Greenland but not in Denmark. CONCLUSIONS These associations suggest that environment interacts with candidate asthma genes to modulate asthma pathogenesis in the Inuit.
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Affiliation(s)
- T Haahtela
- Skin and Allergy Hospital, Helsinki University Hospital, Helsinki, Finland
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Simpson A, Martinez FD. The role of lipopolysaccharide in the development of atopy in humans. Clin Exp Allergy 2009; 40:209-23. [PMID: 19968655 DOI: 10.1111/j.1365-2222.2009.03391.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Atopy is a highly prevalent condition and remains the single biggest risk factor for asthma. Although atopy has a heritable component, the time frame of the increase in the prevalence indicates that it is not due to genetic factors alone. The relationship between allergen exposure and sensitization is complex. Lipopolysaccharide (LPS) and its bioactive moiety endotoxin are common to all gram-negative bacteria, and have been used as a surrogate of microbial load. Endotoxin can be readily measured in dust collected from homes. Some studies have demonstrated a clear inverse dose-response relationship between exposure to endotoxin and the risk of atopy but this finding has not been reproduced in all studies. Our innate immune system recognizes LPS readily via the LPS signal transduction pathway, which has the trimolecular complex of CD14/TLR4/MD2 at the core. A common single-nucleotide polymorphism in the promoter region of CD14 rs2569190 C to T (CD14/-260 or CD14/-159) has been associated with elevated sCD14. Although early studies suggested that this variant was associated with more severe atopy, this finding was not uniformly replicated. It has now been demonstrated in four independent populations that high exposure to endotoxin in the domestic environment is protective against the development of atopy, but only among carriers of the C allele, that is, the environmental exposure is only relevant when taken in the context of the genotype. Furthermore, this interaction is biologically plausible. We propose that neither the environmental exposure nor the genotype in isolation is sufficient to cause complex diseases like asthma and atopy, but disease results from the one acting in the context of the other, of which CD14 and endotoxin is one example contributing to the risk for atopy.
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Affiliation(s)
- A Simpson
- Manchester Academic Health Science Centre, NIHR Translational Research Facility in Respiratory Medicine, University Hospital of South Manchester NHS Foundation Trust, The University of Manchester, Manchester, UK.
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The era of genome-wide association studies: opportunities and challenges for asthma genetics. J Hum Genet 2009; 54:624-8. [PMID: 19816512 DOI: 10.1038/jhg.2009.97] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In the era of genome-wide association (GWA) studies, delineating pathogenic asthma genetic pathways has provided both challenges and opportunities. Initial GWA studies on asthma and asthma-like phenotypes provided some successes in terms of ascertaining new potential asthma candidate genes. However, due to asthma having a heterogeneous etiology, replications of these genotype-phenotype association studies are generally lacking. Furthermore, genes by environment interactions are generally not considered when GWA studies are conducted. Therefore, there is a need for extensive collaborations in multi-disciplinary research fields, including different environments and populations, to investigate the functional importance of variations in the human genome in relation to asthma pathogenesis.
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