Object's details: 8-Oxoguanine incision activity is impaired in lung tissues of NSCLC patients with the polymorphism of OGG1 and XRCC1 genes

Provider:Repozytorium Instytutu Biochemii i Biofizyki Polskiej Akademii Nauk

Description

Title:
8-Oxoguanine incision activity is impaired in lung tissues of NSCLC patients with the polymorphism of OGG1 and XRCC1 genes
Creator:
Janik, Justyna;
Swoboda, Maja;
Janowska, Beata;
Cieśla, Jarosław M.;
Gackowski, Daniel;
Kowalewski, Janusz;
Oliński, Ryszard;
Tudek, Barbara;
Speina, Elzbieta
Description:
Decreased repair of oxidative DNA damage is a risk factor for developing certain human malignancies. We have previously found that the capacity of 8-oxo-7,8-dihydroguanine repair was lower in leukocytes of NSCLC patients than in controls. To explain these observations, we searched for mutations and polymorphisms in the OGG1 gene among 88 NSCLC patients and 79 controls. One patient exhibited a heterozygous mutation in exon 1, which resulted in Arg46Gln substitution. Normal lung and tumor tissue carrying this mutation showed markedly lower 8-oxoG incision activity than the mean for all patients. The predominant polymorphism of OGG1 was Ser326Cys. A significant difference was observed in the frequencies of the OGG1 variants between populations of NSCLC patients and controls. The frequency of the Cys326 allele and the number of Cys326Cys homozygotes was higher among patients than controls. In individuals with either Ser326Cys or Cys326Cys genotype 8-oxoG incision rate was lower than in those with both Ser326 alleles, either in lung or leukocytes. Moreover, 8-oxodG level was higher in lung tissue and leukocytes of patients carrying two Cys326 alleles and in leukocytes of patients with the Ser326Cys genotype. We also screened for polymorphisms of the XRCC1 gene. Only heterozygotes of the XRCC1 variants Arg194Trp, Arg280His and Arg399Gln were found among patients and controls, with the frequency of Arg280His being significantly higher among patients. NSCLC patients with Arg280His or Arg399Gln polymorphism revealed lower 8-oxoG incision activity in their lung tissues, but not in leukocytes. We can conclude that the OGG1 Ser326Cys polymorphisms may have an impact on the efficiency of 8-oxoG incision in humans and the XRCC1 His280 and Gln399 may influence the OGG1 activity in tissues exposed to chronic oxidative/inflammatory stress. Higher frequency of the OGG1 Cys326 allele among NSCLC patients may partially explain the impairment of the 8-oxoG repair observed in their leukocytes.
Object availability:
free access
Date:
2011
Type:
Article;
PeerReviewed
Language:
eng
Format:
application/msword;
application/pdf
Publisher:
Elsevier
Relation: http://eprints.ibb.waw.pl/275
Subject:
Q Science (General)
Identifier: http://eprints.ibb.waw.pl/275/1/Janik_et_al_OGG1-XRCC1-20012011-black.doc ;http://eprints.ibb.waw.pl/275/2/Janik_et_al_OGG1-XRCC1-20012011-black.doc ;http://eprints.ibb.waw.pl/275/3/Tables.doc ;http://eprints.ibb.waw.pl/275/4/Tables.doc ;http://eprints.ibb.waw.pl/275/5/Figures_PDF.pdf ;http://eprints.ibb.waw.pl/275/6/Figures_PDF.pdf ;
Janik, Justyna and Swoboda, Maja and Janowska, Beata and Cieśla, Jarosław M. and Gackowski, Daniel and Kowalewski, Janusz and Oliński, Ryszard and Tudek, Barbara and Speina, Elzbieta (2011) 8-Oxoguanine incision activity is impaired in lung tissues of NSCLC patients with the polymorphism of OGG1 and XRCC1 genes. Mutation Research/Fundamental and Molecular Mechanisms of Mutagenesis .
Data provider:
Repozytorium Instytutu Biochemii i Biofizyki Polskiej Akademii Nauk

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Object's details: 8-Oxoguanine incision activity is impaired in lung tissues of NSCLC patients with the polymorphism of OGG1 and XRCC1 genes

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