Objective: To explore the relationship between genetic polymorphisms in hMTH1, hOGG1 and hMYH and risks of chronic benzene poisoning (CBP).
Methods: A case control study was conducted. One hundred and fifty-two BP patients and 152 workers occupationally exposed to benzene without poisoning manifestations were investigated. The polymerase chain reaction restrained fragment length polymorphism technique (PCR-RFLP) was applied to detect the single nucleotide polymorphisms (SNPs) on c.83 of hMTH1 gene, c.326 of hOGG1 gene and c.335 of hMYH gene.
Results: There were 2.51 times (OR(adj) = 2.51, 95% CI: 1.14-5.49, P = 0.02) and 2.49 times (OR(adj) = 2.49, 95% CI: 1.52-4.07, P < 0.01) risks of BP for individuals carrying genotypes of hMTH1c.83Val/Met + Met/Met or hOGG1c.326Cys/Cys compared with individuals carrying genotypes of hMTH1c.83Val/Val or hOGG1c.326Ser/Cys + Ser/Ser, respectively. Compared with individuals carrying genotypes of hOGG1c.326Cys/Cy and hMYHc.335 is/His at the same time, there was 0.33 times (OR(adj) = 0.33, 95% CI = 0.15-0.72, P = 0.01) risks of BP for these with genotypes of hOGG1c.326Ser/Cys + Ser/Ser and hMYHc.335His/Gln + Gln/Gln simultaneously. In the smoking group, there was 0.15 times (OR(adj) = 0.15, 95% CI: 0.03-0.68, P = 0.01) risks of BP for subjects carrying genotypes of hMYHc.335His/Gln + Gln/Gln compared with these carrying genotypes of hMYHc.335His/His.
Conclusion: Polymorphisms of hMTH1 Val83 Met and hOGG1 Ser326Cys may contribute to altered risks of CBP, and potential interaction may exist among polymorphisms of hOGG1 Ser326Cys and hMYH His335Gln.
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