Abstract
Background: Variations in Toll-like receptor 2 (TLR2) encoding gene have been associated with atopic conditions. Objective: The present work aims to analyze single nucleotide polymorphism (SNP) of TLR2 gene Arg753Gln in atopic dermatitis (AD) and its association with allergen sensitization and disease severity. Methodology: 110 AD patients and 75 healthy controls were enrolled and subjected to genotyping of TLR2 gene Arg753Gln by restriction enzyme analysis and allergy investigations. Results: TLR2 Arg753Gln SNP was significantly more frequent in the patients (48%) in comparison to the healthy group (32%) (0R= 1.7). Individuals with the G/A genotype were at a higher risk for AD development by two times. Inhalant allergens specific IgE were distinguished in 80 % of patients with TLR2 gene polymorphism. Conclusion: GA genotype of TLR2 gene is more dominant in severe cases of atopic dermatitis and associated with sensitization to certain inhalant allergens as house dust mites and pollens.
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