Multiethnic meta-analysis identifies ancestry-specific and cross-ancestry loci for pulmonary function

Area of Science:

• Genetics and Genomics
• Pulmonary Medicine
• Population Health

Background:

• Previous research identified nearly 100 loci for pulmonary function, predominantly in European ancestry populations.
• Genetic studies of lung function have historically lacked ethnic diversity, potentially limiting generalizability.

Purpose of the Study:

• To extend the genetic understanding of pulmonary function by conducting a multiethnic genome-wide association study meta-analysis.
• To identify novel genetic loci associated with lung function across diverse ancestral groups.
• To pinpoint potential causal variants and genes using integrative genomics approaches.

Main Methods:

• Meta-analysis of genome-wide association studies (GWAS) using 1000 Genomes imputed variants.
• Inclusion of a multiethnic cohort comprising 90,715 individuals (European, African, Asian, Hispanic/Latino).
• Application of fine-mapping methods integrating functional annotation, gene expression, and linkage disequilibrium differences.

Main Results:

• Identification of over 50 additional loci associated with pulmonary function at genome-wide significance.
• Discovery of novel genes, including KCNK2 and CDK12, with potential as drug targets.
• Fine-mapping efforts provided insights into potential causal variants and genes at both known and new loci.

Conclusions:

• Multiethnic and integrative genomics approaches are crucial for advancing the genetic understanding of lung function.
• The study identified novel genetic loci and genes, expanding the known genetic architecture of pulmonary function.
• Several implicated genes have potential clinical relevance as drug targets, warranting further investigation.