NATURAL REGULATORY T CELLS AND THEIR MOLECULAR MARKER FOXP3 IN FREQUENTLY ILL PRE-SCHOOL CHILDREN LIVING IN AREAS WITH HUMAN-INDUCED IMPACT

Abstract

The study presents the review of recent literature on microbial resistance in children suffered from reccurent respiratory infaction (RRI). Special aspects of immune system in children with allergy and acute respiratory infection are discussed. We report the description of natural regulatory T lymphocytes subpopulations and their transcription factor FOXP3 in frequently ill children. Dynamic changes in Treg concentration and expression of FOXP3 in groups of healthy, children with RRI and children with combination of RRI and allergy are described. It is proved that in case of allergy despite its aetiology and severity, children have increased concentration of CD4+CD25hi in blood. We suggest that in children with RRI and allergy an insufficient function of Treg is compensated by the increased number of cells and in this case they have a remission of allergy. Treatment of acute allergy by topical or inhaled glucocorticosteriods leads to the increased expression of molecular marker FOXP3 and can be considered as one of their modes of action.

Keywords

• frequently ill children
• allergy
• natural regulatory t lymphocytes
• treg
• foxp3
• glucocorticosteriods