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A genome-wide meta-analysis of genetic variants associated with allergic rhinitis and grass sensitization and their interaction with birth order

Ramasamy, A. and Curjuric, I. and Coin, L. J. and Kumar, A. and McArdle, W. L. and Imboden, M. and Leynaert, B. and Kogevinas, M. and Schmid-Grendelmeier P., and Pekkanen, J. and Wjst, M. and Bircher, A. J. and Sovio, U. and Rochat, T. and Hartikainen, A. L. and Balding, D. J. and Jarvelin, M. R. and Probst-Hensch N., and Strachan, D. P. and Jarvis, D. L.. (2011) A genome-wide meta-analysis of genetic variants associated with allergic rhinitis and grass sensitization and their interaction with birth order. Journal of allergy and clinical immunology, 128 (5). pp. 996-1005.

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Official URL: http://edoc.unibas.ch/dok/A6002084

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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 x 10(-9); P(AR) = 8.0 x 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 x 10(-9); P(AR) = 3.8 x 10(-8)). The third genome-wide significant variant was rs17513503 (P(grass) = 1.2 x 10(-8); PAR = 7.4 x 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) 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
Faculties and Departments:03 Faculty of Medicine > Bereich Spezialfächer (Klinik) > Dermatologie USB > Dermatologie (Bircher)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Spezialfächer (Klinik) > Dermatologie USB > Dermatologie (Bircher)
09 Associated Institutions > Swiss Tropical and Public Health Institute (Swiss TPH) > Department of Epidemiology and Public Health (EPH) > Chronic Disease Epidemiology > Genetic Epidemiology of Non-Communicable Diseases (Probst-Hensch)
03 Faculty of Medicine > Departement Public Health > Sozial- und Präventivmedizin > Genetic Epidemiology of Non-Communicable Diseases (Probst-Hensch)
UniBasel Contributors:Curjuric, Ivan and Bircher, Andreas J. and Probst Hensch, Nicole
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Mosby
ISSN:0091-6749
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:03 May 2018 09:39
Deposited On:13 Sep 2013 07:57

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