1
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Conti DM, Vibeke B, Kirsten B, Leif B, Adam C, Stephanie D, Mina G, Monika G, Philippe G, Eckard H, Hellings PW, Milos J, Kopp MV, Marcus M, Marcia P, Dermot R, Scadding GK, Eike W, Ulrich W, Susanne L. EUFOREUM Berlin 2023: Optimizing care for type 2 inflammatory diseases from clinic to AI: A pediatric focus. Pediatr Allergy Immunol 2024; 35:e14183. [PMID: 38949196 DOI: 10.1111/pai.14183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 06/04/2024] [Accepted: 06/12/2024] [Indexed: 07/02/2024]
Abstract
The European Forum for Research and Education in Allergy and Airways diseases (EUFOREA) organized its bi-annual forum EUFOREUM in Berlin in November 2023. The aim of EUFOREUM 2023 was to highlight pediatric action plans for prevention and optimizing care for type 2 inflammatory conditions starting in childhood, with a focus on early-stage diagnosis, ensuring neither under- nor overdiagnosis, optimal care, and suggestions for improvement of care. EUFOREA is an international not-for-profit organization forming an alliance of all stakeholders dedicated to reducing the prevalence and burden of chronic respiratory diseases through the implementation of optimal patient care via educational, research, and advocacy activities. The inclusive and multidisciplinary approach of EUFOREA was reflected in the keynote lectures and faculty of the virtual EUFOREUM 2023 (www.euforea.eu/euforeum) coming from the pediatric, allergology, pulmonology, ENT, dermatology, primary health care fields and patients around the central theme of type 2 inflammation. As most type 2 inflammatory conditions may start in childhood or adolescence, and most children have type 2 inflammation when suffering from a respiratory or skin disease, the moment has come to raise the bar of ambitions of care, including prevention, remission and disease modification at an early stage. The current report provides a comprehensive overview of key statements by the faculty of the EUFOREUM 2023 and the ambitions of EUFOREA allowing all stakeholders in the respiratory field to be updated and ready to join forces in Europe and beyond.
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Affiliation(s)
- Diego M Conti
- The European Forum for Research and Education in Allergy and Airway Diseases Scientific Expert Team Members, Brussels, Belgium
- Escuela de Doctorado UAM, Centro de Estudios de Posgrado, Universidad Autónoma de Madrid, Madrid, Spain
| | - Backer Vibeke
- Department of Otorhinolaryngology, Head & Neck Surgery, and Audiology, Rigshospitalet, Copenhagen University, Copenhagen, Denmark
| | - Beyer Kirsten
- Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Bjermer Leif
- Department of Respiratory Medicine & Allergology, Institute for Clinical Science, Skane University Hospital, Lund University, Lund, Sweden
| | - Chaker Adam
- Department of Otorhinolaryngology and Center for Allergy and Environment (ZAUM), TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Dramburg Stephanie
- Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Gaga Mina
- 1st Respiratory Medicine Department, Hygeia Hospital, Marousi, Greece
- WHO Europe, Standing Committee SCRC
| | - Gappa Monika
- Department of Pediatrics, Evangelisches Krankenhaus Düsseldorf, Düsseldorf, Germany
| | - Gevaert Philippe
- Laboratory of Upper Airways Research, Department of Otorhinolaryngology, University of Ghent, Ghent, Belgium
| | - Hamelmann Eckard
- Children's Center Bethel, University Hospital Bielefeld, University Bielefeld, Bielefeld, Germany
| | - Peter W Hellings
- Laboratory of Upper Airways Research, Department of Otorhinolaryngology, University of Ghent, Ghent, Belgium
- KU Leuven Department of Microbiology and Immunology, Allergy and Clinical Immunology Research Unit, Leuven, Belgium
- Clinical Department of Otorhinolaryngology, Head and Neck Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Jesenak Milos
- Department of Pulmonology and Phthisiology, Department of Pediatrics, Department of Clinical Immunology and Allergology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, University Hospital in Martin, Martin, Slovakia
| | - Matthias V Kopp
- Division of Paediatric Pneumology and Allergology, University Children's Hospital, University Medical Center Schleswig-Holstein Campus Luebeck, Luebeck, Germany
- Airway Research Center North (ARCN), Member of the German Center for Lung Research (DZL), Grosshansdorf, Germany
- Division of Paediatric Respiratory Medicine and Allergology, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Maurer Marcus
- Institute of Allergology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology and Allergology, Berlin, Germany
| | - Podesta Marcia
- EFA - European Federation of Allergy and Airways Diseases Patients' Associations, Brussels, Belgium
| | - Ryan Dermot
- Allergy and Respiratory Research Group, Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, Edinburgh, UK
- International Primary Care Respiratory Group, Edinburgh, UK
| | - Glenis K Scadding
- Department of Allergy & Rhinology, Royal National ENT Hospital, London, UK
- Division of Immunity and Infection, University College, London, UK
| | - Wüstenberg Eike
- Department of Otorhinolaryngology Head and Neck Surgery, Faculty of Medicine (and University Hospital) Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Wahn Ulrich
- Emeritus Department of Pediatric Pneumology and Immunology, Charité Universitaetsmedizin Berlin, Berlin, Germany
| | - Lau Susanne
- Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine, Charité Universitätsmedizin Berlin, Berlin, Germany
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Pontikas A, Antonatos C, Evangelou E, Vasilopoulos Y. Candidate Gene Association Studies in Atopic Dermatitis in Participants of European and Asian Ancestry: A Systematic Review and Meta-Analysis. Genes (Basel) 2023; 14:1456. [PMID: 37510360 PMCID: PMC10379179 DOI: 10.3390/genes14071456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 07/12/2023] [Accepted: 07/15/2023] [Indexed: 07/30/2023] Open
Abstract
Atopic dermatitis (AD) has been extensively investigated for genetic associations utilizing both candidate gene approaches and genome-wide scans. Here, we comprehensively evaluated the available literature to determine the association of candidate genes in AD to gain additional insight into the etiopathogenesis of the disease. We systematically screened all studies that explored the association between polymorphisms and AD risks in cases of European and Asian ancestry and synthesized the available evidence through a random-effects meta-analysis. We identified 99 studies that met our inclusion/exclusion criteria that examined 17 candidate loci in Europeans and 14 candidate genes in Asians. We confirmed the significant associations between FLG variants in both European and Asian populations and AD risk, while synthesis of the available data revealed novel loci mapped to IL18 and TGFB1 genes in Europeans and IL12RB1 and MIF in Asians that have not yet been identified by genome-wide association studies. Our findings provide comprehensive evidence for AD risk loci in cases of both European and Asian ancestries, validating previous associations as well as revealing novel loci that could imply previously unexplored biological pathways.
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Affiliation(s)
- Alexandros Pontikas
- Laboratory of Genetics, Section of Genetics, Cell Biology and Development, Department of Biology, University of Patras, 26504 Patras, Greece
| | - Charalabos Antonatos
- Laboratory of Genetics, Section of Genetics, Cell Biology and Development, Department of Biology, University of Patras, 26504 Patras, Greece
| | - Evangelos Evangelou
- Department of Hygiene and Epidemiology, University of Ioannina Medical School, 45110 Ioannina, Greece
- Biomedical Research Institute, Foundation for Research and Technology-Hellas, 45110 Ioannina, Greece
- Department of Epidemiology & Biostatistics, School of Public Health, Imperial College London, London W2 1PG, UK
| | - Yiannis Vasilopoulos
- Laboratory of Genetics, Section of Genetics, Cell Biology and Development, Department of Biology, University of Patras, 26504 Patras, Greece
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Broderick C, Ziehfreund S, van Bart K, Arents B, Eyerich K, Weidinger S, Rastrick J, Zink A, Flohr C. Biomarkers associated with the development of comorbidities in patients with atopic dermatitis: A systematic review. Allergy 2023; 78:84-120. [PMID: 36366871 PMCID: PMC10107168 DOI: 10.1111/all.15578] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 10/06/2022] [Accepted: 11/07/2022] [Indexed: 11/13/2022]
Abstract
Biomarkers associated with the development of comorbidities in atopic dermatitis (AD) patients have been reported, but have not yet been systematically reviewed. Seven electronic databases were searched, from database inception to September 2021. English language randomized controlled trials, prospective and retrospective cohort, and case-control studies that investigated the association between a biomarker and the development of comorbidities in AD patients were included. Two authors independently screened the records for eligibility, one extracted all data, and critically appraised the quality of studies and risk of bias. Fifty six articles met the inclusion criteria, evaluating 146 candidate biomarkers. The most frequently reported biomarkers were filaggrin mutations and allergen specific-IgE. Promising biomarkers include specific-IgE and/or skin prick tests predicting the development of asthma, and genetic polymorphisms predicting the occurrence of eczema herpeticum. The identified studies and biomarkers were highly heterogeneous, and associated with predominately moderate-to-high risk of bias across multiple domains. Overall, findings were inconsistent. High-quality studies assessing biomarkers associated with the development of comorbidities in people with AD are lacking. Harmonized datasets and independent validation studies are urgently needed.
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Affiliation(s)
- Conor Broderick
- Unit for Population-Based Dermatology Research, School of Basic and Medical Biosciences, St John's Institute of Dermatology, King's College London, London, UK
| | - Stefanie Ziehfreund
- Department of Dermatology and Allergy, School of Medicine, Technical University of Munich, Munich, Germany
| | - Karin van Bart
- Royal College of Physicians, National Guideline Centre, London, UK
| | - Bernd Arents
- Dutch Association for People with Atopic Dermatitis, Nijkerk, The Netherlands
| | - Kilian Eyerich
- Department of Dermatology and Allergy, School of Medicine, Technical University of Munich, Munich, Germany.,Division of Dermatology and Venerology, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
| | - Stephan Weidinger
- Department of Dermatology and Allergy, University Hospital Schleswig-Holstein, Kiel, Germany
| | | | - Alexander Zink
- Department of Dermatology and Allergy, School of Medicine, Technical University of Munich, Munich, Germany.,Division of Dermatology and Venerology, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
| | - Carsten Flohr
- Unit for Population-Based Dermatology Research, School of Basic and Medical Biosciences, St John's Institute of Dermatology, King's College London, London, UK
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Margaritte-Jeannin P, Budu-Aggrey A, Ege M, Madore AM, Linhard C, Mohamdi H, von Mutius E, Granell R, Demenais F, Laprise C, Bouzigon E, Dizier MH. Identification of OCA2 as a novel locus for the co-morbidity of asthma-plus-eczema. Clin Exp Allergy 2021; 52:70-81. [PMID: 34155719 DOI: 10.1111/cea.13972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 06/04/2021] [Accepted: 06/04/2021] [Indexed: 11/27/2022]
Abstract
BACKGROUND Numerous genes have been associated with the three most common allergic diseases (asthma, allergic rhinitis or eczema) but these genes explain only a part of the heritability. In the vast majority of genetic studies, complex phenotypes such as co-morbidity of two of these diseases, have not been considered. This may partly explain missing heritability. OBJECTIVE To identify genetic variants specifically associated with the co-morbidity of asthma-plus-eczema. METHODS We first conducted a meta-analysis of four GWAS (Genome-Wide Association Study) of the combined asthma-plus-eczema phenotype (total of 8807 European-ancestry subjects of whom 1208 subjects had both asthma and eczema). To assess whether the association with SNP(s) was specific to the co-morbidity, we also conducted a meta-analysis of homogeneity test of association according to disease status ("asthma-plus-eczema" vs. the presence of only one disease "asthma only or eczema only"). We then used a joint test by combining the two test statistics from the co-morbidity-SNP association and the phenotypic heterogeneity of SNP effect meta-analyses. RESULTS Seven SNPs were detected for specific association to the asthma-plus-eczema co-morbidity, two with significant and five with suggestive evidence using the joint test after correction for multiple testing. The two significant SNPs are located in the OCA2 gene (Oculocutaneous Albinism II), a new locus never detected for significant evidence of association with any allergic disease. This gene is a promising candidate gene, because of its link to skin and lung diseases, and to epithelial barrier and immune mechanisms. CONCLUSION Our study underlines the importance of studying sub-phenotypes as co-morbidities to detect new susceptibility genes.
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Affiliation(s)
| | - Ashley Budu-Aggrey
- Medical Research Council (MRC) Integrative Epidemiology Unit, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
| | - Markus Ege
- Comprehensive Pneumology Center Munich (CPC-M), German Center for Lung Research, Dr von Hauner Children's Hospital, Ludwig Maximilian University, Munich, Germany
| | - Anne-Marie Madore
- Département des Sciences Fondamentales, Centre Intersectoriel en Santé Durable (CISD), Université du Québec à Chicoutimi, Saguenay, QC, Canada
| | | | | | - Erika von Mutius
- Comprehensive Pneumology Center Munich (CPC-M), German Center for Lung Research, Dr von Hauner Children's Hospital, Ludwig Maximilian University, Munich, Germany
| | - Raquel Granell
- Medical Research Council (MRC) Integrative Epidemiology Unit, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
| | | | - Catherine Laprise
- Département des Sciences Fondamentales, Centre Intersectoriel en Santé Durable (CISD), Université du Québec à Chicoutimi, Saguenay, QC, Canada
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Dêbiñska A, Danielewicz H, Drabik-Chamerska A, Kalita D, Boznañski A. Chromosome 11q13.5 variant as a risk factor for atopic dermatitis in children. Postepy Dermatol Alergol 2020; 37:103-110. [PMID: 32467693 PMCID: PMC7247065 DOI: 10.5114/ada.2020.93388] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 09/19/2018] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION Atopic dermatitis is a chronic inflammatory skin disease with a strong genetic basis. Recent GWASs have identified a single nucleotide polymorphism on chromosome 11q13.5 (rs7927894) as novel susceptibility loci of atopic dermatitis. AIM To evaluate the association of this genetic variant with atopic dermatitis and to investigate its possible interaction with filaggrin null mutations in children population. MATERIAL AND METHODS One hundred eighty-eight children less than 2 years old were screened for the variant of allele of rs7927894 on chromosome 11q13.5 and for the 4 most prevalent filaggrin mutations. The variant of allele of rs7927894 and all filaggrin mutations were genotyped by real-time PCR assays with subsequent melting curve analysis using SimpleProbe® probes. RESULTS The allele of rs7927894[T] was associated with a significantly increased risk of atopic dermatitis (OR = 2.21; 95% CI: 1.14-4.28; p = 0.015). Both allergic and non-allergic patient groups had rs7927894[T] allele significantly more frequently than the control group, however, the frequency of alleles did not differ in these two groups. Interestingly, when rs7927894 variant and filaggrin mutations were considered together, the risk of atopic dermatitis was the most increased in the subjects who combined both rs7927894[T] allele and filaggrin mutations (OR = 16.41; p = 0.003). CONCLUSIONS Our results indicate that the rs7927894 variant on chromosome 11q13.5 may play a role in the development of atopic dermatitis, but this effect seems to be independent of allergic sensitization and of the well-established filaggrin risk alleles, but may be modulated by gene-gene interactions.
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Affiliation(s)
- Anna Dêbiñska
- 1 Department and Clinic of Paediatrics, Allergology and Cardiology, Wroclaw Medical University, Wroclaw, Poland
| | - Hanna Danielewicz
- 1 Department and Clinic of Paediatrics, Allergology and Cardiology, Wroclaw Medical University, Wroclaw, Poland
| | - Anna Drabik-Chamerska
- 1 Department and Clinic of Paediatrics, Allergology and Cardiology, Wroclaw Medical University, Wroclaw, Poland
| | - Danuta Kalita
- 1 Department and Clinic of Paediatrics, Allergology and Cardiology, Wroclaw Medical University, Wroclaw, Poland
| | - Andrzej Boznañski
- 1 Department and Clinic of Paediatrics, Allergology and Cardiology, Wroclaw Medical University, Wroclaw, Poland
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Suaini NHA, Wang Y, Soriano VX, Martino DJ, Allen KJ, Ellis JA, Koplin JJ. Genetic determinants of paediatric food allergy: A systematic review. Allergy 2019; 74:1631-1648. [PMID: 30835860 DOI: 10.1111/all.13767] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 01/31/2019] [Accepted: 02/14/2019] [Indexed: 12/27/2022]
Abstract
BACKGROUND The genetic determinants of food allergy have not been systematically reviewed. We therefore systematically reviewed the literature on the genetic basis of food allergy, identifying areas for further investigation. METHODS We searched three electronic databases (MEDLINE, EMBASE and PubMed) on 9 January 2018. Two authors screened retrieved articles for review according to inclusion criteria and extracted relevant information on study characteristics and measures of association. Eligible studies included those that reported an unaffected nonatopic control group, had genetic information and were carried out in children. RESULTS Of the 2088 studies retrieved, 32 met our inclusion criteria. Five were genome-wide association studies, and the remaining were candidate gene studies. Twenty-two of the studies were carried out in a predominantly Caucasian population with the remaining 10 from Asian-specific populations or unspecified ethnicity. We found FLG, HLA, IL10, IL13, as well as some evidence for other variants (SPINK5, SERPINB and C11orf30) that are associated with food allergy. CONCLUSIONS Little genetic research has been carried out in food allergy, with FLG, HLA and IL13 being the most reproducible genes for an association with food allergy. Despite promising results, existing genetic studies on food allergy are inundated with issues such as inadequate sample size and absence of multiple testing correction. Few included replication analyses or population stratification measures. Studies addressing these limitations along with functional studies are therefore needed to unravel the mechanisms of action of the identified genes.
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Affiliation(s)
- Noor H. A. Suaini
- Department of Paediatrics University of Melbourne Parkville Victoria Australia
- Centre for Food and Allergy Research Murdoch Children’s Research Institute Parkville Victoria Australia
| | - Yichao Wang
- Department of Paediatrics University of Melbourne Parkville Victoria Australia
- Centre for Food and Allergy Research Murdoch Children’s Research Institute Parkville Victoria Australia
| | - Victoria X. Soriano
- Department of Paediatrics University of Melbourne Parkville Victoria Australia
- Centre for Food and Allergy Research Murdoch Children’s Research Institute Parkville Victoria Australia
| | - David J. Martino
- Department of Paediatrics University of Melbourne Parkville Victoria Australia
- Centre for Food and Allergy Research Murdoch Children’s Research Institute Parkville Victoria Australia
- Telethon Kids Institute University of Western Australia Perth Western Australia Australia
| | - Katrina J. Allen
- Department of Paediatrics University of Melbourne Parkville Victoria Australia
- Centre for Food and Allergy Research Murdoch Children’s Research Institute Parkville Victoria Australia
- Department of Allergy and Clinical Immunology Royal Children's Hospital Parkville Victoria Australia
- Institute of Inflammation and Repair University of Manchester Manchester UK
| | - Justine A. Ellis
- Department of Paediatrics University of Melbourne Parkville Victoria Australia
- Genes, Environment & Complex Disease Murdoch Children’s Research Institute Parkville Victoria Australia
- Centre for Social and Early Emotional Development, Faculty of Health Deakin University Burwood Victoria Australia
| | - Jennifer J. Koplin
- Centre for Food and Allergy Research Murdoch Children’s Research Institute Parkville Victoria Australia
- School of Population and Global Health University of Melbourne Parkville Victoria Australia
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Greenblatt R, Bacchetti P, Boylan R, Kober K, Springer G, Anastos K, Busch M, Cohen M, Kassaye S, Gustafson D, Aouizerat B. Genetic and clinical predictors of CD4 lymphocyte recovery during suppressive antiretroviral therapy: Whole exome sequencing and antiretroviral therapy response phenotypes. PLoS One 2019; 14:e0219201. [PMID: 31415590 PMCID: PMC6695188 DOI: 10.1371/journal.pone.0219201] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 06/18/2019] [Indexed: 12/12/2022] Open
Abstract
Increase of peripheral blood CD4 lymphocyte counts is a key goal of combined antiretroviral therapy (cART); most, but not all, recipients respond adequately and promptly. A small number of studies have examined specific genetic factors associated with the extent of CD4 recovery. We report a genome-wide examination of factors that predict CD4 recovery in HIV-infected women. We identified women in in a cohort study who were on cART with viral load below 400 copies, and drew racially and ethnically matched samples of those with good CD4 response over 2 years or poor response. We analyzed the exomes of those women employing next generation sequencing for genes associated with CD4 recovery after controlling for non-genetic factors identified through forward stepwise selection as important. We studied 48 women with good CD4 recovery and 42 with poor CD4 recovery during virologically-suppressive cART. Stepwise logistic regression selected only age as a statistically significant (p<0.05) non-genetic predictor of response type (each additional year of age reduced the odds of good recovery by 11% (OR = 0.89, CI = 0.84–0.96, p = 0.0009). After adjustment for age and genomic estimates of race and ethnicity, 41 genes harbored variations associated with CD4 recovery group (p≤0.001); 5 of these have been previously reported to be associated with HIV infection, 4 genes would likely influence CD4 homeostasis, and 13 genes either had known functions or were members of product families that had functions for which interactions with HIV or effects on lymphocyte homeostasis were biologically plausible. Greater age was the strongest acquired factor that predicted poor CD4 cell recovery. Sequence variations spanning 41 genes were independently predictive of CD4 recovery. Many of these genes have functions that impact the cell cycle, apoptosis, lymphocyte migration, or have known interactions with HIV. These findings may help inform new hypotheses related to responses to HIV therapy and CD4 lymphocyte homeostasis.
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Affiliation(s)
- Ruth Greenblatt
- UCSF School of Pharmacy, Department of Clinical Pharmacy, San Francisco, CA, United States of America
- UCSF School of Medicine, Department of Epidemiology and Biostatistics, San Francisco, CA, United States of America
- UCSF School of Medicine, Department of Medicine, San Francisco, CA, United States of America
- * E-mail:
| | - Peter Bacchetti
- UCSF School of Medicine, Department of Epidemiology and Biostatistics, San Francisco, CA, United States of America
| | - Ross Boylan
- UCSF School of Medicine, Department of Epidemiology and Biostatistics, San Francisco, CA, United States of America
| | - Kord Kober
- UCSF School of Nursing, Department of Physiological Nursing, San Francisco, CA, United States of America
| | - Gayle Springer
- Johns Hopkins Bloomberg School of Public Health, Department of Epidemiology, Baltimore, MD, United States of America
| | - Kathryn Anastos
- Albert Einstein College of Medicine and Montefiore Health Systems, Bronx, NY, United States of America
| | - Michael Busch
- UCSF School of Medicine, Department of Epidemiology and Biostatistics, San Francisco, CA, United States of America
- Blood Systems Research Institute, San Francisco, CA, United States of America
| | - Mardge Cohen
- Stroger Hospital, Chicago, IL, United States of America
| | - Seble Kassaye
- Georgetown University Medical Center, Department of Medicine, Washington, DC, United States of America
| | - Deborah Gustafson
- State University of New York, Downstate Medical Center, Department of Neurology, Brooklyn, NY, United States of America
| | - Bradley Aouizerat
- New York University School of Dentistry and Bluestone Center for Clinical Research, NY, NY, United States of America
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Lau S, Matricardi PM, Wahn U, Lee YA, Keil T. Allergy and atopy from infancy to adulthood. Ann Allergy Asthma Immunol 2019; 122:25-32. [DOI: 10.1016/j.anai.2018.05.012] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 05/01/2018] [Accepted: 05/14/2018] [Indexed: 11/29/2022]
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9
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Stockis J, Dedobbeleer O, Lucas S. Role of GARP in the activation of latent TGF-β1. MOLECULAR BIOSYSTEMS 2018; 13:1925-1935. [PMID: 28795730 DOI: 10.1039/c7mb00251c] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
TGF-β1, 2 and 3 cytokines are involved in many cellular processes including cell proliferation, differentiation, migration and survival. Whereas TGF-β2 and 3 play important roles in embryonic development, TGF-β1 is mostly implicated in controlling immune responses after birth. The production of TGF-β1 is a tightly regulated process, occurring mostly at a post-translational level. Virtually all cells produce the latent, inactive form of TGF-β1. In latent TGF-β1, the mature TGF-β1 dimer is non-covalently associated to the Latency Associated Peptide, or LAP, which prevents binding to the TGF-β1 receptor. Activation of the cytokine implies release of mature TGF-β1 from LAP. Only a few cell types activate latent TGF-β1, via mechanisms that are cell type specific. Proteins such as integrins, proteases and thrombospondin-1 activate TGF-β1 in epithelial cells, fibroblasts and dendritic cells. More recently, the protein GARP was shown to be involved in TGF-β1 activation by regulatory T cells (Treg), a subset of CD4+ T lymphocytes specialized in suppression of immune responses. GARP is a transmembrane protein that binds latent-TGF-β1 and tethers it on the Treg surface. The role of GARP was studied mostly in Tregs, and this was recently reviewed in L. Sun, H. Jin and H. Li, Oncotarget, 2016, 7, 42826-42836. However, GARP is also expressed in non-immune cells. This review focuses on the roles of GARP in latent TGF-β1 activation by immune and non-immune cells.
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Affiliation(s)
- Julie Stockis
- de Duve Institute, Université catholique de Louvain, Brussels, Belgium.
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10
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Marenholz I, Grosche S, Kalb B, Rüschendorf F, Blümchen K, Schlags R, Harandi N, Price M, Hansen G, Seidenberg J, Röblitz H, Yürek S, Tschirner S, Hong X, Wang X, Homuth G, Schmidt CO, Nöthen MM, Hübner N, Niggemann B, Beyer K, Lee YA. Genome-wide association study identifies the SERPINB gene cluster as a susceptibility locus for food allergy. Nat Commun 2017; 8:1056. [PMID: 29051540 PMCID: PMC5648765 DOI: 10.1038/s41467-017-01220-0] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 08/31/2017] [Indexed: 02/08/2023] Open
Abstract
Genetic factors and mechanisms underlying food allergy are largely unknown. Due to heterogeneity of symptoms a reliable diagnosis is often difficult to make. Here, we report a genome-wide association study on food allergy diagnosed by oral food challenge in 497 cases and 2387 controls. We identify five loci at genome-wide significance, the clade B serpin (SERPINB) gene cluster at 18q21.3, the cytokine gene cluster at 5q31.1, the filaggrin gene, the C11orf30/LRRC32 locus, and the human leukocyte antigen (HLA) region. Stratifying the results for the causative food demonstrates that association of the HLA locus is peanut allergy-specific whereas the other four loci increase the risk for any food allergy. Variants in the SERPINB gene cluster are associated with SERPINB10 expression in leukocytes. Moreover, SERPINB genes are highly expressed in the esophagus. All identified loci are involved in immunological regulation or epithelial barrier function, emphasizing the role of both mechanisms in food allergy.
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Affiliation(s)
- Ingo Marenholz
- Max-Delbrück-Center (MDC) for Molecular Medicine, 13125, Berlin, Germany.,Clinic for Pediatric Allergy, Experimental and Clinical Research Center, Charité University Medical Center, 13125, Berlin, Germany
| | - Sarah Grosche
- Max-Delbrück-Center (MDC) for Molecular Medicine, 13125, Berlin, Germany.,Clinic for Pediatric Allergy, Experimental and Clinical Research Center, Charité University Medical Center, 13125, Berlin, Germany
| | - Birgit Kalb
- Max-Delbrück-Center (MDC) for Molecular Medicine, 13125, Berlin, Germany.,Clinic for Pediatric Allergy, Experimental and Clinical Research Center, Charité University Medical Center, 13125, Berlin, Germany.,Department of Pediatric Pneumology and Immunology, Charité University Medical Center, 13353, Berlin, Germany
| | - Franz Rüschendorf
- Max-Delbrück-Center (MDC) for Molecular Medicine, 13125, Berlin, Germany
| | - Katharina Blümchen
- Department of Allergy, Pulmonology and Cystic Fibrosis, Children's Hospital, Goethe University, 60590, Frankfurt am Main, Germany
| | - Rupert Schlags
- Department of Pediatric Pneumology and Allergology, Wangen Hospital, 88239, Wangen, Germany
| | - Neda Harandi
- Department of Pediatric Pneumology and Allergology, Wangen Hospital, 88239, Wangen, Germany
| | - Mareike Price
- Department of Pediatric Pneumology, Allergology and Neonatology, Hannover Medical School, 30625, Hannover, Germany
| | - Gesine Hansen
- Department of Pediatric Pneumology, Allergology and Neonatology, Hannover Medical School, 30625, Hannover, Germany
| | - Jürgen Seidenberg
- Department of Pediatric Pneumology and Allergology, Neonatology and Intensive Care, Medical Campus of University Oldenburg, 26133, Oldenburg, Germany
| | - Holger Röblitz
- Department of Pediatrics and Adolescent Medicine, Sana Klinikum Lichtenberg, 10365, Berlin, Germany
| | - Songül Yürek
- Department of Pediatric Pneumology and Immunology, Charité University Medical Center, 13353, Berlin, Germany
| | - Sebastian Tschirner
- Department of Pediatric Pneumology and Immunology, Charité University Medical Center, 13353, Berlin, Germany
| | - Xiumei Hong
- Department of Population, Family and Reproductive Health, Center on the Early Life Origins of Disease, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, 21205, USA
| | - Xiaobin Wang
- Department of Population, Family and Reproductive Health, Center on the Early Life Origins of Disease, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, 21205, USA
| | - Georg Homuth
- Department of Functional Genomics, Interfaculty Institute for Genetics and Functional Genomics, University Medicine and Ernst-Moritz-Arndt-University Greifswald, 17487, Greifswald, Germany
| | - Carsten O Schmidt
- Institute for Community Medicine, Study of Health in Pomerania/KEF, University Medicine Greifswald, 17475, Greifswald, Germany
| | - Markus M Nöthen
- Institute of Human Genetics and Department of Genomics, Life & Brain Center, University of Bonn, 53127, Bonn, Germany
| | - Norbert Hübner
- Max-Delbrück-Center (MDC) for Molecular Medicine, 13125, Berlin, Germany
| | - Bodo Niggemann
- Department of Pediatric Pneumology and Immunology, Charité University Medical Center, 13353, Berlin, Germany
| | - Kirsten Beyer
- Department of Pediatric Pneumology and Immunology, Charité University Medical Center, 13353, Berlin, Germany
| | - Young-Ae Lee
- Max-Delbrück-Center (MDC) for Molecular Medicine, 13125, Berlin, Germany. .,Clinic for Pediatric Allergy, Experimental and Clinical Research Center, Charité University Medical Center, 13125, Berlin, Germany.
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11
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Danielewicz H. Hits and defeats of genome-wide association studies of atopy and asthma. J Appl Biomed 2017. [DOI: 10.1016/j.jab.2017.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
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12
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Meta-analysis identifies seven susceptibility loci involved in the atopic march. Nat Commun 2015; 6:8804. [PMID: 26542096 PMCID: PMC4667629 DOI: 10.1038/ncomms9804] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Accepted: 10/06/2015] [Indexed: 12/20/2022] Open
Abstract
Eczema often precedes the development of asthma in a disease course called the ‘atopic march'. To unravel the genes underlying this characteristic pattern of allergic disease, we conduct a multi-stage genome-wide association study on infantile eczema followed by childhood asthma in 12 populations including 2,428 cases and 17,034 controls. Here we report two novel loci specific for the combined eczema plus asthma phenotype, which are associated with allergic disease for the first time; rs9357733 located in EFHC1 on chromosome 6p12.3 (OR 1.27; P=2.1 × 10−8) and rs993226 between TMTC2 and SLC6A15 on chromosome 12q21.3 (OR 1.58; P=5.3 × 10−9). Additional susceptibility loci identified at genome-wide significance are FLG (1q21.3), IL4/KIF3A (5q31.1), AP5B1/OVOL1 (11q13.1), C11orf30/LRRC32 (11q13.5) and IKZF3 (17q21). We show that predominantly eczema loci increase the risk for the atopic march. Our findings suggest that eczema may play an important role in the development of asthma after eczema. The development of asthma following eczema is known as the atopic march. Here the authors conduct a GWAS on affected children and identify two novel loci associated with the disease phenotype.
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13
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Unravelling the complex genetic background of atopic dermatitis: from genetic association results towards novel therapeutic strategies. Arch Dermatol Res 2015; 307:659-70. [PMID: 25693656 DOI: 10.1007/s00403-015-1550-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Revised: 01/14/2015] [Accepted: 01/31/2015] [Indexed: 02/06/2023]
Abstract
Atopic dermatitis (AD) is a chronic inflammatory skin disease arising from complex interaction between genetic and environmental factors. As the starting point of the so-called "atopic march", e.g. the progression towards allergic asthma in some but not all affected children, AD has come into focus for potential disease-modifying strategies. To elucidate the genetic factors influencing AD development, linkage, association as well as genome-wide association studies have been performed over the last two decades. The results suggest that besides variation in immune-mediated pathways, an intact skin barrier function plays a key role in AD development. Mutations in the gene encoding filaggrin, a major structural protein in the epidermis, have been consistently associated with AD, especially the early-onset persistent form of disease, and are regarded as the most significant known risk factor for AD development to date. Additionally, variation in some other genes involved in skin integrity and barrier function have shown association with AD. However, the known genetic risk factors can only explain a small part of the heritability at the moment. Whole-exome or whole-genome sequencing studies have not been reported yet, but will probably soon evaluate the influence of rare variations for AD development. Additionally, large multi-centre studies comprehensively incorporating gene-gene and gene-environment interactions as well as epigenetic mechanisms might further elucidate the genetic factors underlying AD pathogenesis and, thus, open the way for a more individualized treatment in the future.
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14
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Shared genetic determinants between eczema and other immune-related diseases. Curr Opin Allergy Clin Immunol 2014; 13:478-86. [PMID: 23945175 DOI: 10.1097/aci.0b013e328364e8f7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
PURPOSE OF REVIEW Eczema and other allergic disorders are complex diseases caused by multiple genetic and environmental factors. Here, we review recent success in the identification of novel susceptibility loci for eczema. RECENT FINDINGS Genome-wide association studies led to marked progress in unraveling the genetic determinants of allergic disorders. In the past 4 years, a total of 14 new eczema susceptibility loci have been identified and nearly all of them were successfully replicated. Seven additional eczema loci were recently identified by alternative strategies utilizing the remarkable overlap in the genetic cause of diverse immune-related traits. Apart from underlining the importance of the skin barrier in eczema, these studies point to specific immunological functions altered in eczema pathogenesis. SUMMARY The new findings demonstrate that common pathways are involved in the development of eczema and other immune-related traits. Moreover, the genetic determinants shared between eczema, asthma, and allergic rhinitis should aid in resolving the molecular mechanisms triggering disease progression along the atopic march. The identification of the underlying genes and causal variants will be the major challenge for upcoming studies.
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15
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Genome-wide association studies in asthma: what they really told us about pathogenesis. Curr Opin Allergy Clin Immunol 2013; 13:112-8. [PMID: 23222155 DOI: 10.1097/aci.0b013e32835c1674] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW Over the past years, several consortia have provided a data deluge from large-scale, genome-wide association studies (GWASs) for numerous asthma and allergy related traits. Dozens of reviews have already summarized the main results, although a coherent picture is still missing, referred to as 'missing' or 'unexplained' heritability. RECENT FINDINGS We identify the factors responsible for the unexplained heritability including imprecise phenotyping, biased single-nucleotide polymorphism selection (preferentially gene-based and high allele frequency with poor linkage disequilibrium tagging capacity), heterogeneity and insufficient significance ranking test statistics. In spite of these problems, three major outcomes can already be identified. First, rare variants give the highest risk estimates but are limited to small subgroups indicating a complex origin of asthma that may involve hundreds of variants that are either population, family or individual specific. Second, only a few common variants are shared amongst all asthmatics where the IL33/ST2 pathway turns out to be the most relevant factor. Third, transcription factor binding sites are enriched amongst the top association results pointing towards disturbed regulatory network function in asthma. SUMMARY The next wave of asthma genetic studies will use full-genome sequencing and overcome most GWAS-associated problems. It will be the last step of a century-long search for asthma genes, satisfying scientific curiosity and, hopefully, also providing data applicable in translational medicine.
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16
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High-density genotyping study identifies four new susceptibility loci for atopic dermatitis. Nat Genet 2013; 45:808-12. [PMID: 23727859 DOI: 10.1038/ng.2642] [Citation(s) in RCA: 129] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2012] [Accepted: 04/25/2013] [Indexed: 12/14/2022]
Abstract
Atopic dermatitis is a common inflammatory skin disease with a strong heritable component. Pathogenetic models consider keratinocyte differentiation defects and immune alterations as scaffolds, and recent data indicate a role for autoreactivity in at least a subgroup of patients. FLG (encoding filaggrin) has been identified as a major locus causing skin barrier deficiency. To better define risk variants and identify additional susceptibility loci, we densely genotyped 2,425 German individuals with atopic dermatitis (cases) and 5,449 controls using the Immunochip array followed by replication in 7,196 cases and 15,480 controls from Germany, Ireland, Japan and China. We identified four new susceptibility loci for atopic dermatitis and replicated previous associations. This brings the number of atopic dermatitis risk loci reported in individuals of European ancestry to 11. We estimate that these susceptibility loci together account for 14.4% of the heritability for atopic dermatitis.
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17
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Williams HC, Chalmers JR, Simpson EL. Prevention of atopic dermatitis. F1000 MEDICINE REPORTS 2012; 4:24. [PMID: 23236339 PMCID: PMC3515944 DOI: 10.3410/m4-24] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Atopic dermatitis now affects one in five children, and may progress to asthma and hay fever. In the absence of effective treatments that influence disease progression, prevention is a highly desirable goal. The evidence for most existing disease prevention strategies, such as avoidance of allergens and dietary interventions, has been unconvincing and inconsistent. Fresh approaches to prevention include trying to induce tolerance to allergens in early life, and enhancing the defective skin barrier to reduce skin inflammation, sensitisation and subsequent allergic disease. Early and aggressive treatment of atopic dermatitis represents another possible secondary prevention strategy that could interrupt the development of autoimmunity, which may account for atopic dermatitis persistence. Large scale and long term randomized controlled trials are needed to demonstrate that these ideas result in clinical benefit.
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Affiliation(s)
- Hywel C Williams
- Centre of Evidence Based Dermatology, University of Nottingham King's Meadow Campus, Lenton Lane, Nottingham, NG7 2NR, UK ; Nottingham University Hospitals NHS Trust, Dermatology Department Queen's Medical Centre Campus, Derby Road, Nottingham, NG7 2RB, UK
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18
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Current World Literature. Curr Opin Allergy Clin Immunol 2012; 12:570-3. [DOI: 10.1097/aci.0b013e328358c69e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Skin barrier function and its importance at the start of the atopic march. J Allergy (Cairo) 2012; 2012:901940. [PMID: 22619686 PMCID: PMC3352623 DOI: 10.1155/2012/901940] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Revised: 01/24/2012] [Accepted: 02/06/2012] [Indexed: 01/02/2023] Open
Abstract
Atopic dermatitis can be due to a variety of causes from nonatopic triggers to food allergy. Control of egress of water and protection from ingress of irritants and allergens are key components of cutaneous barrier function. Current research suggests that a degraded barrier function of the skin allows the immune system inappropriate access to environmental allergens. Epidermal aeroallergen exposure may allow sensitization to allergen possibly initiating the atopic march. Further research into connections between epidermal barrier function and possible allergen sensitization will be important to undertake. Future clinical trials focused on skin barrier protection may be of value as a possible intervention in prevention of the initiation of the atopic march.
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20
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Tang HY, Tang XF, Zuo XB, Gao JP, Sheng YJ, Li Y, Zhou FS, Yin XY, Xiao FL, Du WD, Yang S, Sun LD, Zhang XJ. Association analysis of single nucleotide polymorphisms at five loci: comparison between atopic dermatitis and asthma in the Chinese Han population. PLoS One 2012; 7:e35334. [PMID: 22545103 PMCID: PMC3335873 DOI: 10.1371/journal.pone.0035334] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Accepted: 03/14/2012] [Indexed: 11/18/2022] Open
Abstract
Atopic diseases, such as atopic dermatitis (AD) and asthma, are closely related to clinical phenotypes with hypersensitivity, and often share some similar genetic and pathogenic bases. Our recent GWAS identified three susceptibility gene/loci FLG (rs11204971 and rs3126085), 5q22.1 (rs10067777, rs7701890, rs13360927 and rs13361382) and 20q13.33 (rs6010620) to AD. The effect of these AD associated polymorphisms in asthma is so far unknown. To investigate whether AD relevant genetic variants is identical to asthma and reveal the differences in genetic factors between AD and asthma in Chinese Han population, seven AD associated single nucleotide polymorphisms (SNPs) as well as 3 other SNPs (rs7936562 and rs7124842 at 11q13.5 and rs4982958 at 14q11.2) from our previous AD GWAS were genotyped in 463 asthma patients and 985 controls using Sequenom MassArray system. We found rs4982958 at 14q11.2 was significantly associated with asthma (P = 3.04×10−4, OR = 0.73). We also detected one significant risk haplotype GGGA from the 4 SNPs (rs10067777, rs7701890, rs13360927 and rs13361382) at 5q22.1 in AD cases (Pcorrection = 3.60×10−10, OR = 1.26), and the haplotype was suggestive of risk in asthma cases in this study (P = 0.014, Pcorrection = 0.084, OR = 1.38). These SNPs (rs11204971, rs3126085, rs7936562, rs712484 and rs6010620) at AD susceptibility genes/loci FLG, 11q13.5 and 20q13.33 were not associated with asthma in this study. Our results further comfirmed that 14q11.2 was an important candidate locus for asthma and demonstrated that 5q22.1 might be shared by AD and asthma in Chinese Han population.
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Affiliation(s)
- Hua-Yang Tang
- Institute of Dermatology and Department of Dermatology, No.1 Hospital, Anhui Medical University, Hefei, Anhui, China
- Key Laboratory of Dermatology, Anhui Medical University, Ministry of Education, China, Hefei, Anhui, China
- State Key Laboratory Incubation Base of Dermatology, Anhui Medical University, Hefei, Anhui, China
| | - Xian-Fa Tang
- Institute of Dermatology and Department of Dermatology, No.1 Hospital, Anhui Medical University, Hefei, Anhui, China
- Key Laboratory of Dermatology, Anhui Medical University, Ministry of Education, China, Hefei, Anhui, China
- State Key Laboratory Incubation Base of Dermatology, Anhui Medical University, Hefei, Anhui, China
| | - Xian-Bo Zuo
- Key Laboratory of Dermatology, Anhui Medical University, Ministry of Education, China, Hefei, Anhui, China
- State Key Laboratory Incubation Base of Dermatology, Anhui Medical University, Hefei, Anhui, China
| | - Jin-Ping Gao
- Institute of Dermatology and Department of Dermatology, No.1 Hospital, Anhui Medical University, Hefei, Anhui, China
- Key Laboratory of Dermatology, Anhui Medical University, Ministry of Education, China, Hefei, Anhui, China
- State Key Laboratory Incubation Base of Dermatology, Anhui Medical University, Hefei, Anhui, China
| | - Yu-Jun Sheng
- Institute of Dermatology and Department of Dermatology, No.1 Hospital, Anhui Medical University, Hefei, Anhui, China
- Key Laboratory of Dermatology, Anhui Medical University, Ministry of Education, China, Hefei, Anhui, China
- State Key Laboratory Incubation Base of Dermatology, Anhui Medical University, Hefei, Anhui, China
| | - Yang Li
- Institute of Dermatology and Department of Dermatology, No.1 Hospital, Anhui Medical University, Hefei, Anhui, China
- Key Laboratory of Dermatology, Anhui Medical University, Ministry of Education, China, Hefei, Anhui, China
- State Key Laboratory Incubation Base of Dermatology, Anhui Medical University, Hefei, Anhui, China
| | - Fu-Sheng Zhou
- Key Laboratory of Dermatology, Anhui Medical University, Ministry of Education, China, Hefei, Anhui, China
- State Key Laboratory Incubation Base of Dermatology, Anhui Medical University, Hefei, Anhui, China
| | - Xian-Yong Yin
- Institute of Dermatology and Department of Dermatology, No.1 Hospital, Anhui Medical University, Hefei, Anhui, China
- Key Laboratory of Dermatology, Anhui Medical University, Ministry of Education, China, Hefei, Anhui, China
- State Key Laboratory Incubation Base of Dermatology, Anhui Medical University, Hefei, Anhui, China
| | - Feng-Li Xiao
- Institute of Dermatology and Department of Dermatology, No.1 Hospital, Anhui Medical University, Hefei, Anhui, China
- Key Laboratory of Dermatology, Anhui Medical University, Ministry of Education, China, Hefei, Anhui, China
- State Key Laboratory Incubation Base of Dermatology, Anhui Medical University, Hefei, Anhui, China
| | - Wei-Dong Du
- Key Laboratory of Dermatology, Anhui Medical University, Ministry of Education, China, Hefei, Anhui, China
- State Key Laboratory Incubation Base of Dermatology, Anhui Medical University, Hefei, Anhui, China
| | - Sen Yang
- Institute of Dermatology and Department of Dermatology, No.1 Hospital, Anhui Medical University, Hefei, Anhui, China
- Key Laboratory of Dermatology, Anhui Medical University, Ministry of Education, China, Hefei, Anhui, China
- State Key Laboratory Incubation Base of Dermatology, Anhui Medical University, Hefei, Anhui, China
| | - Liang-Dan Sun
- Institute of Dermatology and Department of Dermatology, No.1 Hospital, Anhui Medical University, Hefei, Anhui, China
- Key Laboratory of Dermatology, Anhui Medical University, Ministry of Education, China, Hefei, Anhui, China
- State Key Laboratory Incubation Base of Dermatology, Anhui Medical University, Hefei, Anhui, China
- * E-mail: (LDS); (XJZ)
| | - Xue-Jun Zhang
- Institute of Dermatology and Department of Dermatology, No.1 Hospital, Anhui Medical University, Hefei, Anhui, China
- Key Laboratory of Dermatology, Anhui Medical University, Ministry of Education, China, Hefei, Anhui, China
- State Key Laboratory Incubation Base of Dermatology, Anhui Medical University, Hefei, Anhui, China
- * E-mail: (LDS); (XJZ)
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Epstein TG, LeMasters GK, Bernstein DI, Ericksen MB, Martin LJ, Ryan PH, Biagini Myers JM, Butsch Kovacic MS, Lindsey MA, He H, Reponen T, Villareal MS, Lockey JE, Bernstein CK, Khurana Hershey GK. Genetic variation in small proline rich protein 2B as a predictor for asthma among children with eczema. Ann Allergy Asthma Immunol 2012; 108:145-50. [PMID: 22374195 DOI: 10.1016/j.anai.2012.01.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2011] [Revised: 12/06/2011] [Accepted: 01/10/2012] [Indexed: 10/28/2022]
Abstract
BACKGROUND Small proline rich protein 2B (SPRR2B) is a skin and lung epithelial protein associated with allergic inflammation in mice that has not been evaluated in human atopic diseases. OBJECTIVE To determine whether single-nucleotide polymorphisms (SNPs) in SPRR2B are associated with childhood eczema and with the phenotype of childhood eczema combined with asthma. METHODS Genotyping for SPRR2B and filaggrin (FLG) was performed in 2 independent populations: the Cincinnati Childhood Allergy & Air Pollution Study (CCAAPS; N = 762; birth-age, 4 years) and the Greater Cincinnati Pediatric Clinical Repository (GCPCR; N = 1152; ages 5-10 years). Eczema and eczema plus asthma were clinical outcomes based on parental report and clinician's diagnosis. Genetic analyses were restricted to whites and adjusted for sex in both cohorts and adjusted for environmental covariates in CCAAPS. RESULTS Variants in SPRR2B were not significantly associated with eczema in either cohort after Bonferroni adjustment. Children from both cohorts with the CC genotype of the SPRR2B rs6693927 SNP were at 4 times the risk for eczema plus asthma (adjusted odds ratio, 4.1; 95% confidence interval, 1.5-10.9; P = .005 in CCAAPS; and adjusted odds ratio, 4.0; 95% confidence interval, 1.8-9.1; P < .001 in the GCPCR), however. SNPs in SPRR2B were not in strong linkage disequilibrium with the R501X and del2282 FLG mutations, and these findings were independent of FLG. CONCLUSIONS An SNP in SPRR2B was predictive of asthma among white children with eczema from 2 independent populations. SPRR2B polymorphisms may serve as important predictive markers for the combined eczema plus asthma phenotype.
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Affiliation(s)
- Tolly G Epstein
- Department of Medicine, Division of Immunology, Allergy, and Rheumatology, University of Cincinnati, Cincinnati, Ohio 45229, USA
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22
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Li X, Ampleford EJ, Howard TD, Moore WC, Li H, Busse WW, Castro M, Erzurum SC, Fitzpatrick AM, Gaston B, Israel E, Jarjour NN, Teague WG, Wenzel SE, Hawkins GA, Bleecker ER, Meyers DA. The C11orf30-LRRC32 region is associated with total serum IgE levels in asthmatic patients. J Allergy Clin Immunol 2011; 129:575-8, 578.e1-9. [PMID: 22070912 DOI: 10.1016/j.jaci.2011.09.040] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2011] [Revised: 09/13/2011] [Accepted: 09/21/2011] [Indexed: 01/05/2023]
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23
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Ramasamy A, Curjuric I, Coin LJ, Kumar A, McArdle WL, Imboden M, Leynaert B, Kogevinas M, Schmid-Grendelmeier P, Pekkanen J, Wjst M, Bircher AJ, Sovio U, Rochat T, Hartikainen AL, Balding DJ, Jarvelin MR, Probst-Hensch N, Strachan DP, Jarvis DL. A genome-wide meta-analysis of genetic variants associated with allergic rhinitis and grass sensitization and their interaction with birth order. J Allergy Clin Immunol 2011; 128:996-1005. [PMID: 22036096 DOI: 10.1016/j.jaci.2011.08.030] [Citation(s) in RCA: 145] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2011] [Revised: 08/22/2011] [Accepted: 08/29/2011] [Indexed: 01/03/2023]
Abstract
BACKGROUND Hay fever or seasonal allergic rhinitis (AR) is a chronic disorder associated with IgE sensitization to grass. The underlying genetic variants have not been studied comprehensively. There is overwhelming evidence that those who have older siblings have less AR, although the mechanism for this remains unclear. OBJECTIVE We sought to identify common genetic variant associations with prevalent AR and grass sensitization using existing genome-wide association study (GWAS) data and to determine whether genetic variants modify the protective effect of older siblings. METHOD Approximately 2.2 million genotyped or imputed single nucleotide polymorphisms were investigated in 4 large European adult cohorts for AR (3,933 self-reported cases vs 8,965 control subjects) and grass sensitization (2,315 cases vs 10,032 control subjects). RESULTS Three loci reached genome-wide significance for either phenotype. The HLA variant rs7775228, which cis-regulates HLA-DRB4, was strongly associated with grass sensitization and weakly with AR (P(grass) = 1.6 × 10(-9); P(AR) = 8.0 × 10(-3)). Variants in a locus near chromosome 11 open reading frame 30 (C11orf30) and leucine-rich repeat containing 32 (LRRC32), which was previously associated with atopic dermatitis and eczema, were also strongly associated with both phenotypes (rs2155219; P(grass) = 9.4 × 10(-9); P(AR) = 3.8 × 10(-8)). The third genome-wide significant variant was rs17513503 (P(grass) = 1.2 × 10(-8); PAR = 7.4 × 10(-7)) which was located near transmembrane protein 232 (TMEM232) and solute carrier family 25, member 46 (SLC25A46). Twelve further loci with suggestive associations were also identified. Using a candidate gene approach, where we considered variants within 164 genes previously thought to be important, we found variants in 3 further genes that may be of interest: thymic stromal lymphopoietin (TSLP), Toll-like receptor 6 (TLR6) and nucleotide-binding oligomerization domain containing 1 (NOD1/CARD4). We found no evidence for variants that modified the effect of birth order on either phenotype. CONCLUSIONS This relatively large meta-analysis of GWASs identified few loci associated with AR and grass sensitization. No birth order interaction was identified in the current analyses.
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Affiliation(s)
- Adaikalavan Ramasamy
- Respiratory Epidemiology and Public Health, Imperial College, London, United Kingdom
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24
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Abstract
Atopic dermatitis (AD) results from barrier defects combined with modified immune responses of the innate and the adaptive immune system to exogenous and endogenous factors. Recent research has continued to sort out the complex pathophysiologic puzzle of this frequent skin disease. However, the network of mechanisms leading to the manifestation of AD is far from being completely understood.
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Wouters MM. New insight in the pathogenesis of functional gastrointestinal disorders: association between genetics and colonic transit. Neurogastroenterol Motil 2011; 23:893-7. [PMID: 21914040 DOI: 10.1111/j.1365-2982.2011.01774.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Genome wide association studies and meta-analyses identified risk factors related to epithelial integrity of the intestinal barrier, innate immune responses and autophagy in inflammatory bowel disorder (IBD) and celiac disease. Irritable bowel syndrome (IBS), the most common functional gastrointestinal disorder (FGID), coexists and shares common, although milder, features with IBD and celiac disease. Although our knowledge on genetic variability in IBS symptom generation is very limited, smaller scale studies attempt to provide insight in the mechanisms underlying IBS. Camilleri et al. identified associations for susceptibility loci in inflammatory and epithelial barrier genes with colonic transit in lower FGID. Their report is the first descriptive study to assess potential genetic factors involved in motor function. Further exploration of genetic variation in IBS will be crucial to unravel its' pathogenesis.
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Affiliation(s)
- M M Wouters
- Division of Gastroenterology, Translational Research Center for Gastrointestinal Disorders, Catholic University of Leuven, Leuven, Belgium.
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Ferreira MAR, Matheson MC, Duffy DL, Marks GB, Hui J, Le Souëf P, Danoy P, Baltic S, Nyholt DR, Jenkins M, Hayden C, Willemsen G, Ang W, Kuokkanen M, Beilby J, Cheah F, de Geus EJC, Ramasamy A, Vedantam S, Salomaa V, Madden PA, Heath AC, Hopper JL, Visscher PM, Musk B, Leeder SR, Jarvelin MR, Pennell C, Boomsma DI, Hirschhorn JN, Walters H, Martin NG, James A, Jones G, Abramson MJ, Robertson CF, Dharmage SC, Brown MA, Montgomery GW, Thompson PJ. Identification of IL6R and chromosome 11q13.5 as risk loci for asthma. Lancet 2011; 378:1006-14. [PMID: 21907864 PMCID: PMC3517659 DOI: 10.1016/s0140-6736(11)60874-x] [Citation(s) in RCA: 302] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND We aimed to identify novel genetic variants affecting asthma risk, since these might provide novel insights into molecular mechanisms underlying the disease. METHODS We did a genome-wide association study (GWAS) in 2669 physician-diagnosed asthmatics and 4528 controls from Australia. Seven loci were prioritised for replication after combining our results with those from the GABRIEL consortium (n=26,475), and these were tested in an additional 25,358 independent samples from four in-silico cohorts. Quantitative multi-marker scores of genetic load were constructed on the basis of results from the GABRIEL study and tested for association with asthma in our Australian GWAS dataset. FINDINGS Two loci were confirmed to associate with asthma risk in the replication cohorts and reached genome-wide significance in the combined analysis of all available studies (n=57,800): rs4129267 (OR 1·09, combined p=2·4×10(-8)) in the interleukin-6 receptor (IL6R) gene and rs7130588 (OR 1·09, p=1·8×10(-8)) on chromosome 11q13.5 near the leucine-rich repeat containing 32 gene (LRRC32, also known as GARP). The 11q13.5 locus was significantly associated with atopic status among asthmatics (OR 1·33, p=7×10(-4)), suggesting that it is a risk factor for allergic but not non-allergic asthma. Multi-marker association results are consistent with a highly polygenic contribution to asthma risk, including loci with weak effects that might be shared with other immune-related diseases, such as NDFIP1, HLA-B, LPP, and BACH2. INTERPRETATION The IL6R association further supports the hypothesis that cytokine signalling dysregulation affects asthma risk, and raises the possibility that an IL6R antagonist (tocilizumab) may be effective to treat the disease, perhaps in a genotype-dependent manner. Results for the 11q13.5 locus suggest that it directly increases the risk of allergic sensitisation which, in turn, increases the risk of subsequent development of asthma. Larger or more functionally focused studies are needed to characterise the many loci with modest effects that remain to be identified for asthma. FUNDING National Health and Medical Research Council of Australia. A full list of funding sources is provided in the webappendix.
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