Features of innate immunity in children with moderate course of acute urticaria

Background. The prevalence of acute urticaria in children remains high. Urticaria is polietiologic disease, maintaining the homeostasis of the body is carried out by close cooperation of various parts of the immune system. The aim of this investigation was to study the features of innate immunity in children with moderate acute urticaria. Methods. To achieve this goal 71 children with moderate acute urticaria were examined. The control group included 30 healthy children of both sexes of the same age. Clinical methods of the study included disease history analysis, phisical examination of the child with determination of the degree of urticaria severity (calculation of the urticaria activity index within 7 days). Immunological methods included NK-lymphocytes, CD14+CD282+, CD14+CD284+, CD14+CD289+, serum IgE level, lactoferrin, IFN-y, IL-4, IL-6, test with NBT rate. Statistical calculations were performed in R Foundation for Statistical Computing. Results. Urticaria with undetermined causal factor happend more often, urticaria with allergic or pseudo-allergic genesis, as well as parasitic infections were established only in 17% of patients, family allergic history was found in a third of patients, in 41% of children acute urticaria proceeded with angioedema, in 9,3% of children urticaria acquired chronic course. Statistically significant increase of CD14+CD284+, decrease of CD14+CD289+, high concentrations of lactoferrin, decrease of natural killers, increase total serum IgE level in the half of the patients, low microbicidal activity with a decrease in adaptation reserves and reduced levels of IL-4, increased the content of IFN-y were found. Conclusion. The revealed changes indicate an imbalance in innate immunity, the launch of the cytokine cascade of inflammation, which is accompanied by further activation of the regulatory components of the inflammatory process in children suffering from acute urticaria.