Approaches to the diagnosis of immunodeficiency disorders in children with Down syndrome

Relevance. Down syndrome is one of the most common genetic diseases worldwide. People with this syndrome are at risk for developing immunodeficiency conditions. The article discusses the results of a study of TREC and KREC concentrations in children with Down syndrome. The aim of the study was to determine the concentration of TREC and KREC in children with Down syndrome compared with healthy children. Materials and methods. A prospective study was conducted to determine the content of TREC and KREC in the bloo d of children and adolescents with Down syndrome. Results. It was found that the co ncentration of TREС in children with Down syn drome is significantly lower than in healthy children of the appropriate age, which indicates a violation in the development of the T-cell link of immunity. A similar pattern is observed for KREС levels, which indicates a violation of the maturation of B-lymphocytes responsible for the synthesis of antibodies. Conclusion. This study highlights the importance of early diagnosis and monitoring of the immune status in children with Down syndrome by determining the conc entration of TREС and KREС, which will allow timely corrective measures and prevent the development of complications.