A genome-wide association study identifies CDHR3 as a susceptibility locus for early childhood asthma with severe exacerbations.

A genome-wide association study identifies CDHR3 as a susceptibility locus for early childhood asthma with severe exacerbations.

Nature genetics (2013-11-19)

Klaus Bønnelykke, Patrick Sleiman, Kasper Nielsen, Eskil Kreiner-Møller, Josep M Mercader, Danielle Belgrave, Herman T den Dekker, Anders Husby, Astrid Sevelsted, Grissel Faura-Tellez, Li Juel Mortensen, Lavinia Paternoster, Richard Flaaten, Anne Mølgaard, David E Smart, Philip F Thomsen, Morten A Rasmussen, Silvia Bonàs-Guarch, Claus Holst, Ellen A Nohr, Rachita Yadav, Michael E March, Thomas Blicher, Peter M Lackie, Vincent W V Jaddoe, Angela Simpson, John W Holloway, Liesbeth Duijts, Adnan Custovic, Donna E Davies, David Torrents, Ramneek Gupta, Mads V Hollegaard, David M Hougaard, Hakon Hakonarson, Hans Bisgaard

PMID24241537

RESUMEN

Asthma exacerbations are among the most frequent causes of hospitalization during childhood, but the underlying mechanisms are poorly understood. We performed a genome-wide association study of a specific asthma phenotype characterized by recurrent, severe exacerbations occurring between 2 and 6 years of age in a total of 1,173 cases and 2,522 controls. Cases were identified from national health registries of hospitalization, and DNA was obtained from the Danish Neonatal Screening Biobank. We identified five loci with genome-wide significant association. Four of these, GSDMB, IL33, RAD50 and IL1RL1, were previously reported as asthma susceptibility loci, but the effect sizes for these loci in our cohort were considerably larger than in the previous genome-wide association studies of asthma. We also obtained strong evidence for a new susceptibility gene, CDHR3 (encoding cadherin-related family member 3), which is highly expressed in airway epithelium. These results demonstrate the strength of applying specific phenotyping in the search for asthma susceptibility genes.