Increased total serum IgE levels in patients with asthma and promoter polymorphisms at CTLA4 and FCER1B
Summary
This summary is machine-generated.Genetic factors, specifically promoter polymorphisms in CTLA4 and FCER1B, significantly influence total serum IgE levels in asthma patients. This suggests multiple genes contribute to IgE variations in asthma.
Area Of Science
- Immunogenetics
- Allergy and Immunology
Background
- Total serum IgE levels are largely genetically determined.
- FCER1B promoter polymorphism (-109C/T) is a known genetic factor influencing IgE.
- CTLA4 gene is a candidate for high IgE responsiveness due to its role in T(H)2 cell differentiation.
Purpose Of The Study
- To determine if CTLA4 gene polymorphisms are associated with elevated total serum IgE levels.
- To investigate the association between CTLA4 gene polymorphisms and the development of asthma or atopy.
Main Methods
- A case-control study was conducted with 339 asthma patients and 305 healthy controls.
- Genotyping was performed for FCER1B (-109C/T) and two CTLA4 polymorphisms (-318C/T promoter, +49A/G exon 1).
Main Results
- Asthma patients homozygous for CTLA4 -318C allele had higher IgE than those with the -318T allele (P=.00470).
- Combined CTLA4 (-318C/T) and FCER1B (-109C/T) genotypes correlated significantly with increased IgE in asthma patients (P=.000014).
- No significant correlations were found in healthy controls, nor associations with asthma or atopy.
Conclusions
- CTLA4 and FCER1B promoter polymorphisms are genetic factors affecting total serum IgE in asthma patients.
- This supports a polygenic model where multiple genes contribute small effects to IgE level variation in asthma.
View abstract on PubMed