Original scientific paper
https://doi.org/10.2478/10004-1254-62-2011-2098
Association Between XRCC1 Arg399Gln and p53 Arg72Pro Polymorphisms and the Risk of Gastric and Colorectal Cancer in Turkish Population
Ayse Basak Engin
orcid.org/0000-0003-1300-4644
; Gazi University, Faculty of Pharmacy, Department of Toxicology, Ankara, Turkey
Bensu Karahalil
; Gazi University, Faculty of Pharmacy, Department of Toxicology, Ankara, Turkey
Ali Esat Karakaya
; Gazi University, Faculty of Pharmacy, Department of Toxicology, Ankara, Turkey
Atilla Engin
; Gazi University, Faculty of Medicine, Department of General Surgery, Beşevler, Ankara, Turkey
Abstract
Gastric cancer is one of the most common cancers of the gastrointestinal system, and its overall fi ve-year survival rate is still 15 % to 20 %, as it can mostly be diagnosed at an advanced stage. On the other hand, although colorectal cancer has a rather good prognosis, mortality is one half that of the incidence.
As carcinogenesis is believed to involve reactive radicals that cause DNA adduct formation, impaired repair activity, and weakened tumour suppression, it would help to understand the role of the polymorphisms of nucleotide excision repair enzyme XRCC1 and of tumour suppressor gene p53 in gastric and colorectal cancers. Our study included 94 gastric cancer patients, 96 colorectal cancer patients, and 108 cancer-free individuals as control with the aim to see if there was an association between XRCC1 Arg399Gln and p53
Arg72Pro polymorphisms and cancer susceptibility. DNA was extracted from peripheral blood cells and genotypes were determined using the polymerase chain reaction-restriction fragment length polymorphism.
Polymorphism p53 Arg72Pro was not associated with either gastric or colorectal carcinoma, while XRCC1 Arg399Gln was not associated with the increased risk of colorectal cancer. However, XRCC1 homozygous Gln allele at codon 399 was associated with 2.54 times higher risk of gastric cancer.
Keywords
DNA adduct; gene-gene interaction; PCR-RFLP
Hrčak ID:
71753
URI
Publication date:
23.9.2011.
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