Chapter title |
Genetics of Asthma and Allergic Diseases.
|
---|---|
Book title |
Allergic Diseases – From Basic Mechanisms to Comprehensive Management and Prevention
|
Published in |
Handbook of experimental pharmacology, June 2021
|
DOI | 10.1007/164_2021_484 |
Pubmed ID | |
Book ISBNs |
978-3-03-084047-1, 978-3-03-084048-8
|
Authors |
Haider, Sadia, Simpson, Angela, Custovic, Adnan |
Abstract |
Asthma genes have been identified through a range of approaches, from candidate gene association studies and family-based genome-wide linkage analyses to genome-wide association studies (GWAS). The first GWAS of asthma, reported in 2007, identified multiple markers on chromosome 17q21 as associates of the childhood-onset asthma. This remains the best replicated asthma locus to date. However, notwithstanding undeniable successes, genetic studies have produced relatively heterogeneous results with limited replication, and despite considerable promise, genetics of asthma and allergy has, so far, had limited impact on patient care, our understanding of disease mechanisms, and development of novel therapeutic targets. The paucity of precise replication in genetic studies of asthma is partly explained by the existence of numerous gene-environment interactions. Another important issue which is often overlooked is that of time of the assessment of the primary outcome(s) and the relevant environmental exposures. Most large GWASs use the broadest possible definition of asthma to increase the sample size, but the unwanted consequence of this is increased phenotypic heterogeneity, which dilutes effect sizes. One way of addressing this is to precisely define disease subtypes (e.g. by applying novel mathematical approaches to rich phenotypic data) and use these latent subtypes in genetic studies. |
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