Allelic polymorphisms of DNA repairing genes as markers of resistance to asbestos-containing aerosols

Abstract

We studied the frequency distribution of DNA repairing genes allelic polymorphisms in the occupational group of asbestos-cement plants workers (n = 95). The aim of the work was to determine the probable molecular genetic markers of resistance to the development of bronchopulmonary pathology under the action of chrysotile-asbestos-containing dust. In 46 workers with chronic forms of bronchopulmonary pathology and 49 workers of the same professions without chronic diseases of the respiratory system, allelic polymorphisms XPD (rs13181, rs799793), ERCC1 (rs11615), XRCC3 (rs861539), XRCC1 (rs25487), ATM (rs664677), XRCC7 (rs7003908) and MLH1 (rs1799977) were determined using the real-time polymerase chain reaction. It was established that XRCC1•G/A (rs25487) (OR = 0.45; 95% CI: 0.18–1.10; P = 0.050; χ 2 = 3.73); MLH1•A/A (rs1799977) (OR = 0.28; 95% CI: 0.14 – 0.71; P = 0.003; χ 2 = 8.75) genotypes contribute to the resistance to bronchopulmonary pathology development, while XPD•Asn/Asn (rs799793) (OR = 2.20; 95% CI: 1.75–2.77; P = 0.001; χ 2 = 6.62); XRCC1•A/A (rs25487) (OR = 1.73; 95% CI: 1.23–2.43; P = 0.040; χ 2= 3.92); ATM•T/T (rs664677) (OR = 3.47; 95% CI: 1.01–12.51; P = 0.020; χ 2 = 4.98); MLH1•A/G (rs1799977) (OR = 2.95; 95% CI: 1.17–7.49; P = 0.010; χ 2 = 6.42) genotypes were found to be associated with the risk of respiratory disease development. The obtained results show interconnection between certain alleles of DNA repair genes and the risk of bronchopulmonary pathology development under the influence of industrial aerosols, including asbestos-containing ones.

Keywords

• allelic polymorphisms of genes
• bronchopulmonary pathology