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Toll-like receptor gene polymorphisms are associated with allergic rhinitis: a case control study
Daniel Nilsson1, Anand Kumar Andiappan, Christer Halldén
1Division of ENT Diseases, Department of Clinical Sciences, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden. daniel.nilsson.2@ki.se
BMC Medical Genetics
|August 4, 2012
Summary
Genetic variations in the Toll-like receptor 7-8 (TLR7-TLR8) gene region are linked to allergic rhinitis. This finding supports the role of TLR7-TLR8 in the development of allergic diseases.
Area of Science:
- Immunology
- Genetics
- Allergy Research
Background:
- Toll-like receptor (TLR) proteins are crucial for host defense and initiating immune responses.
- Genetic variations in TLR genes have been associated with allergic conditions like asthma and allergic rhinitis.
- The study investigates genetic variations within TLR genes linked to allergic rhinitis.
Purpose of the Study:
- To identify genetic variations in Toll-like receptor genes associated with allergic rhinitis.
- To explore the role of the TLR7-TLR8 gene region in the development of allergic rhinitis.
Main Methods:
- Genotyping of 73 single nucleotide polymorphisms (SNPs) in 182 cases and 378 controls from a Swedish population.
- Further analysis of 24 SNPs in a Swedish cohort (352 cases, 709 controls) and a Chinese cohort (948 cases, 580 controls).
- Quantitative skin prick tests were performed to support genetic findings.
Main Results:
- Four allergic rhinitis-associated SNPs were identified in the TLR7-TLR8 gene region in the initial analysis.
- Subsequent analysis revealed 7 significant SNPs in the Swedish population and 5 in the Chinese population within this region.
- Significant risk-associated haplotypes in the TLR7-TLR8 region were common in both populations, with differing associations observed between sexes in the Swedish and Chinese cohorts.
Conclusions:
- Haplotypes within the TLR7-TLR8 gene region show a significant association with allergic rhinitis in both Swedish and Chinese populations.
- These findings, combined with previous studies linking this region to asthma and allergic rhinitis, strongly implicate TLR7-TLR8 in the pathogenesis of these allergic diseases.
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