Значення поліморфізму тол-подібного рецептора-2 в розвитку сенсибілізації до кліщів домашнього пилу в дітей із атопічним дерматитом

Abstract

Atopic dermatitis is a chronic recurrent inflammatory skin disease that affects 5-20% of children. Airborne allergens derived from house dust mites can cause atopic dermatitis. TLR2 play an important role in the recognition of house dust mite allergens. Purpose - to investigate the prevalence of sensitization to house dust mites in children with atopic dermatitis and the role of TLR2 rs4696480 polymorphism in the development of sensitivity to house dust mites. Materials and methods. The study included 100 patients with atopic dermatitis. Genotyping of the polymorphism TLR2 rs4696480 was performed in the patient group using real-time PCR. Measurements of sIgE to dust mites were performed by Western blotting according to the manufacturer’s protocol (Simesta-Medivis, Ukraine-Germany). Results. Sensitization to house dust mites was found in 48% of children. Children with elevated levels of specific IgE to dust mites had a significantly higher SCORAD index than patients without sensitization (p<0.001). In the group of children sensitized to house dust mites, there were significantly higher levels of total IgE (p<0.001) and a longer course of the disease (p<0.05). There was no statistically significant difference in the distribution of genotypes depending on the presence of sensitization to dust mites (OR=1.250 (0.481-3.245) for AA and AT; OR=2.125 (0.715-6.315) for AA and TT). Conclusions. This study showed that the susceptibility to dust mites among children with atopic dermatitis is 48%. The presence of susceptibility to house dust mites affects the severity of the disease. The research was carried out in accordance with the principles of the Helsinki Declaration. The study protocol was approved by the Local ethics committee of the participating institution. The informed consent of the patient was obtained for conducting the studies. No conflict of interests was declared by the author. Key words: TLR2, house dust mites, atopic dermatitis, children.