THE ANALYSIS OF THE ASSOCIATION OF ADRB2 GENE POLYMORPHISM AND EXTERNAL RESPIRATORY FUNCTION IN CHILDREN WITH BRONCHIAL ASTHMA

Objectives. To study the role of the ADRB2 gene polymorphism (rs1042713) in the impaired external respiratory function in children with bronchial asthma (BA). Material and methods. The study group included 60 children aged 3-17 years with allergic (n=37) and mixed form of BA (n=23). The genotyping of the investigated gene locus was performed by PCR-RFLP (polymerase chain reaction - restriction fragment length polymorphism), BA control was exercised using the Asthma Control Test (ACT). Results. The analysis of allele frequencies showed an association of allele A with normal spirogram parameters in patients with BA (p=0.042). In children under 12 years, there were statistically significant differences in spirogram indices when comparing patients with genotypes AA and GG (p=0.045). An association of allele A with the absence of pathological changes was revealed when evaluating the results of spirometry (p=0.021). There was a moderate positive correlation (r=0.615, p=0.011) between the assessment of nocturnal symptoms (Asthma Control Test) and the genotype of the ADRB2 gene polymorphism in children aged 12 years and older. Conclusions. An association of the ADRΒ2 gene polymorphism (rs1042713) with the external respiratory function was revealed in an objective study by spirometry and a subjective assessment of this indicator by the patient himself/herself or by his/her parents. This gene locus can be included in the BA target panel in order to determine the likelihood of uncontrolled course development of the disease with impaired external respiratory function and in the future to develop an individual program for dispensary observation of the patient.