Analysis of association between histamine receptor gene HRH1, HRH2, HRH3, HRH4 polymorphisms and asthma in children

Asthma is a common multifactorial disease characterized by chronic inflammation of the respiratory tract. Insufficient control of asthma symptoms significantly reduces the patient’s quality of life, leads to the risk for more severe disease and disability. It is important to research the role of gene polymorphisms encoding proteins involved in various stages of histamine metabolism, which is one of the known mediators of allergic reactions.The aim of the study was to investigate histamine receptor gene polymorphisms (HRH1, HRH2, HRH3, HRH4) in children with asthma and the control group.Methods. The study of HRH1 (rs901865), HRH2 (rs2067474), HRH3 (rs3787429), HRH4 (rs11665084) gene polymorphisms in asthma patients and healthy individuals aged 2 - 17 years of different ethnicities living in the Republic of Bashkortostan was carried out. Genotyping of polymorphisms was performed by polymerase chain reaction with fluorescence detection.Results. In Tatars, rs901865*CT genotype and rs901865*T allele of HRH1 gene were associated with asthma development and decrease in spirometry measures (MEF25). In Tatars, a statistically significant model of the interaction between HRH1 (rs901865), HRH3 (rs3787429), and HRH4 (rs11665084) gene polymorphisms that leads to the risk of asthma was established.Conclusion. The results of this study reveal certain aspects of asthma pathogenesis and suggest the possible involvement of polymorphic variants of histamine receptors genes HRH1, HRH3, HRH4 in the development of asthma.