Genome-wide association study reveals mucin-regulating genetic variants linked to moderate-to-severe asthma in European ancestry, highlighting shared architecture with mild disease.
Key Points
To identify novel genetic variants associated with moderate-to-severe asthma, evaluate the contribution of known asthma loci, and uncover biological mechanisms through gene expression analyses.
Conducted a genome-wide association study in individuals of European ancestry and evaluated novel signals across mild, moderate, and severe asthma subtypes.
Assessed genome-wide significant signals for regulatory effects on gene expression in patients with asthma compared to controls, including bronchial epithelial samples.
MUC5AC mRNA expression was significantly increased in bronchial epithelial samples from patients with severe asthma across two independent analyses (p=0.039 and p=0.022).
Demonstrated substantial shared genetic architecture between mild and moderate-to-severe asthma while identifying novel risk loci that regulate mucin production.