Introduction. Distribution of the following allelic variants of DNA repair genes: АТМ (rs664677), XRCC7 (rs7003908), and MLH1 (rs1799977) in the population of personnel of harmful and hazardous occupation has been studied. The studied polymorphisms are recognized as cancer-specific markers of various types and localization of malignant neoplasms, as well as markers of radiosensitivity/resistance to radiation exposure. Objectives of the work: to find out the significance of polymorphisms of repair genes of double-strand DNA breaks: XRCC7 (rs7003908), АТМ (rs664677), and mismatch repair: MLH1 (rs1799977) in the formation of an individual predisposition to the development of chronic diseases of the bronchopulmonary system in miners and personnel ofasbestos-cement plants. Materials and methods. Respondents of the study group was the personnel of asbestos-cement plants and miners with chronic bronchopulmonary disease; the control group was made up of personnel without diseases of the respiratory system. The genotypes of the following genes were determined by real-time polymerase chain reaction: АТМ (rs664677), XRCC7 (rs7003908), and MLH1 (rs1799977). Results. It was established that the minor alleles of ATM•T and MLH1•G, minor homozygote ATM•TT and heterozygote MLH1•AG are associated with the risk of developing chronic diseases of the bronchopulmonary system. It has been revealed that the dominant alleles of ATM•A, MLH1•A; dominant homozygotes ATM•AA; MLH1•AA and heterozygote ATM•AT contribute to resistance to the development of the respiratory system conditions. Conclusion. The following alleles: ATM•T (Р<=0,06, χ2=3,44; OR=1,44; 95 % Cl: 0,96–2,17); MLH1•G (Р<=0,002, χ2=5,06; OR=1,61; 95 % Cl: 1,04–2,49) and genotype: ATM•TT (Р<=0,01, χ2=6,61; OR=2,48; 95 % Cl: 1,16–5,31); MLH1•AG (Р<=0,002, χ2=9,00; OR=2,32; 95 % CI: 1,29–4,21) associated with the risk of bronchopulmonary conditions development have been established. Also alleles: ATM•A (Р<=0,06, χ2=3,44; OR=0,69; 95 % CI: 0,46–1,04); MLH1•A (Р<=0,002, χ2=5,06; OR=0,62; 95 % CI: 0,40–0,96) and genotype: MLH1•A/A (Р<=0,003, χ2=8,73; OR=0,43; 95 % CI: 0,24–0,79) that form resistance to the development of pulmonary system conditions in certain occupational groups have been established. Key words: SNP, ATM, XRCC7, MLH1, bronchopulmonary pathology.
Introduction. Polymorphism of DNA repair genes is actively studied in the formation of the individual sensitivity of the genome to damaging mutagenic effects. Objective of the work. To study the distribution of frequencies of alleles and genotypes of DNA repair genes: XPD (rs13181, rs799793) and ERCC1 (rs11615) in workers of asbestos-cement plants and miners to identify risk markers for bronchopulmonary pathology. Material and methods. The study included workers of asbestos-cement plants and miners (n=214). Real-time polymerase chain reaction was used to determine genotypes of XPD (rs13181, rs799793) and ERCC1 (rs11615) genes. Results. The study determined alleles and genotypes associated with the risk of developing bronchopulmonary pathology: - in the population of workers of asbestos-cement plants: XPD*Asn/Asn (rs799793), (p<0.01; χ2=6.62; OR=2,20; 95 %CI: 1,75–2,77); - in the population of miners: XPD*C (rs13181), (p<0.02; χ2=4,99; OR=1,88; 95 %CI: 1,04–3,40); XPD*CC (rs13181), (p<0,003; χ2=8.61; OR=4,29; 95 %CI: 1,41–13,37). The study also detected allele XPD*A (rs13181), which in the population of miners proved to be a marker of resistance to bronchopulmonary pathology (p<0,02; χ2=4.99; OR=0,53; 95 %CI: 0,29–0,96). Conclusions. The study has identified alleles and genotypes associated with the risk of developing bronchopulmonary pathology in the population of workers in harmful and dangerous production facilities of Ukraine. The study has determined the genotype and allele that can be used as biomarkers of resistance to the pathology of the respiratory system. Key words: molecular-genetic markers, XPD and ERCC1, bronchopulmonary pathology.
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