Lack of involvement of nucleotide excision repair gene polymorphisms in colorectal cancer

Mort, Richard L. and Mo, L. and McEwan, C. and Melton, D. W. (2003) Lack of involvement of nucleotide excision repair gene polymorphisms in colorectal cancer. British Journal of Cancer, 89 (2). pp. 333-337. ISSN 0007-0920

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DNA repair has an essential role in protecting the genome from damage by endogenous and environmental agents. Polymorphisms in DNA repair genes and differences in repair capacity between individuals have been widely documented. For colorectal cancer, the loss of mismatch repair gene activity is a key genetic determinant. Nucleotide excision repair (NER), recombination repair (RR) and base excision repair (BER) pathways have critical roles in protection against other cancers, and we wished to investigate their role in colorectal cancer. We have compared the frequency of polymorphisms in the NER genes, XPD, XPF, XPG, ERCC1; in the BER gene, XRCC1; and in the RR gene, XRCC3; in colorectal cancer patients and in a control group. No significant associations were found for any of the NER gene polymorphisms or for the XRCC1 polymorphism. The C allele (position 18067) of the XRCC3 gene was weakly but significantly associated with colorectal cancer (odds ratio 1.52, 95% confidence interval 1.04-2.22, P=0.03). For all patients who were heterozygous for any of the repair genes studied, tumour tissue was investigated for loss of heterozygosity (LOH). Only one example of LOH was found for all the genes examined. From the association and LOH data, we conclude that these genes do not have an important role in protection against colorectal carcinogenesis.

Item Type:
Journal Article
Journal or Publication Title:
British Journal of Cancer
Uncontrolled Keywords:
?? cell transformation, neoplasticcolorectal neoplasmsdna repairdna-binding proteinsgenotypehumansloss of heterozygosityodds ratiopolymerase chain reactionpolymorphism, geneticpolymorphism, restriction fragment lengthcomparative studyjournal articleresearch ??
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20 Jan 2017 13:28
Last Modified:
15 Jul 2024 16:45