title: The association of polymorphisms in DNA base excision repair genes XRCC1, OGG1 and MUTYH with the risk of childhood acute lymphoblastic leukemia.
abstract: The aim of this study was to evaluate the association of polymorphisms in genes encoding three key proteins of DNA base excision repair (BER): the OGG1 Ser326Cys, the MUTYH Tyr165Cys and the XRCC1 Arg399Gln with the risk of childhood acute lymphoblastic leukemia (ALL). Our study included 97 children patients with ALL (mean age 5.4±2.5) and 131 healthy children (mean age 6.2±2.8) used as controls. Genetic polymorphisms in BER pathway genes were examined using PCR and restriction fragment length polymorphism (RFLP). We have demonstrated that the OGG1 Cys/Cys genotype increases the risk of ALL (OR 5.36) whereas the Ser/Ser genotype variant strongly reduces the risk of this cancer among Polish children (OR 0.45). Although we did not observe the differences in single nucleotide polymorphisms (SNPs) in MUTYH and XRCC1 genes between control group and children with ALL, we have shown that the combined genotypes of examined genes can modulate the risk of childhood ALL in Polish population. We found that the combined genotype Arg/Gln-Cys/Cys of XRCC1/OGG1 (OR 3.83) as well as the Cys/Cys-Tyr/Tyr of OGG1/MUTYH (OR 6.75) increases the risk of ALL. In contrast, the combined genotype Arg/Arg-Ser/Ser of XRCC1/OGG1 (OR 0.40) as well as the Ser/Ser-Tyr/Tyr of OGG1/MUTYH (OR 0.43) played a protective role against this malignant disease. In conclusion, we suggest that polymorphisms of BER genes may be used as an important predictive factor for acute lymphoblastic leukemia in children.
authors.affiliation: Department of Molecular Genetics, University of Lodz, Banacha 12/16 St, 90-237, Lodz, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Stanczyk
authors.forename: T
authors.initials: T
authors.lastname: Sliwinski
authors.forename: M
authors.initials: M
authors.lastname: Cuchra
authors.forename: M
authors.initials: M
authors.lastname: Zubowska
authors.forename: A
authors.initials: A
authors.lastname: Bielecka-Kowalska
authors.forename: M
authors.initials: M
authors.lastname: Kowalski
authors.forename: J
authors.initials: J
authors.lastname: Szemraj
authors.forename: W
authors.initials: W
authors.lastname: Mlynarski
authors.forename: I
authors.initials: I
authors.lastname: Majsterek
mesh_terms: D002648:Child; D045647:DNA Glycosylases / Q000235:genetics*; D004260:DNA Repair / Q000235:genetics*; D004268:DNA-Binding Proteins / Q000235:genetics*; D005260:Female; D056726:Genetic Association Studies; D020022:Genetic Predisposition to Disease; D006801:Humans; D008297:Male; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000201:enzymology / Q000235:genetics*; D012307:Risk Factors; D000076105:X-ray Repair Cross Complementing Protein 1
chemical_list: D004268:DNA-Binding Proteins; D000076105:X-ray Repair Cross Complementing Protein 1; C000619371:XRCC1 protein, human; D045647:DNA Glycosylases; C061738:mutY adenine glycosylase; C479058:oxoguanine glycosylase 1, human