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IL10 gene polymorphisms are associated with asthma phenotypes in children
Helen Lyon1, Christoph Lange, Stephen Lake
1Channing Laboratory, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA.
Genetic Epidemiology
|January 30, 2004
Summary
Interleukin-10 (IL10) gene variations are linked to asthma severity in children. Specific IL10 single-nucleotide polymorphisms (SNPs) and haplotypes correlate with key asthma and allergy indicators, suggesting a role in disease development.
Area of Science:
- Immunogenetics
- Pulmonology
- Pediatric Asthma Research
Background:
- Interleukin-10 (IL10) is an anti-inflammatory cytokine.
- Lower IL10 production is observed in asthmatic individuals' immune cells.
- Reduced IL10 may impact asthma severity and phenotypes.
Purpose of the Study:
- To investigate the association between IL10 single-nucleotide polymorphisms (SNPs) and asthma severity.
- To examine the relationship between IL10 SNPs and allergy phenotypes as quantitative traits.
- To explore the role of IL10 gene variations in childhood asthma.
Main Methods:
- Genotyped six IL10 SNPs (promoter, intron, 3' UTR) in 518 Caucasian asthmatic children and their parents.
- Employed family-based and population-based association tests.
- Analyzed individual SNPs, promoter haplotypes (GCC, ATA), and 6-locus haplotypes.
Main Results:
- A 3' UTR IL10 SNP showed significant association with FEV(1) percent predicted (FEV(1)PP) (P=0.0002).
- Promoter haplotype GCC positively correlated with IgE levels and FEV(1)PP (P=0.007, P=0.012).
- Promoter haplotype ATA negatively correlated with lnPC(20) and FEV(1)PP (P=0.008, P=0.043).
Conclusions:
- IL10 gene polymorphisms are significantly associated with asthma phenotypes in the studied cohort.
- Specific IL10 variations influence lung function and allergic responses in asthmatic children.
- Further research into IL10 gene variations may clarify asthma development mechanisms.