Correlation of Homologous Recombination Repair System by Studying a Single-nucleotide Polymorphism in XRCC3 Gene with Initiation and Progression of Colorectal Cancer
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Abstract
Background: Colorectal cancer is the third cause of cancer death in western countries. Age, inadequate diet, obesity, inactivity and genetic changes are some of the risk factors of colorectal cancer. Correlation of genetic diversity in homologous recombination repair system with cancer was evaluated in many recent studies. This study was done to investigate the correlation of T241M polymorphism in XRCC3 gene and colorectal cancers.Materials and Methods: In this cross-sectional study, after collecting blood samples and extracting genomic DNA, genotype distribution of the polymorphism was determined by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method.Results: A significant correlation was observed between T241M polymorphism and colorectal cancer. Age and family history were also found to be correlated with this cancer. Although no statistically significant relationship has been found between smoking and colon cancer, our findings showed a correlation between smoking and rectum cancer. Furthermore, we observed that the most occurrence of metastatic activity was in the rectum.Conclusion: According to our study, T241M polymorphism in XRCC3 gene from homologous recombination (repair system??) could be a suitable factor for early diagnosis of colorectal cancer, while its co-operation with smoking is also regarded as a risk factor for rectum cancer.Markowitz SD, Bertagnolli MM. Molecular origins of cancer: Molec- ular basis of colorectal cancer. N Engl J Med 2009; 361(25): 2449-60.
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| Issue | Vol 5 No 3 (2013) | |
| Section | Original Articles | |
| Keywords | ||
| Colorectal Cancer Homologous Recombination Repair System XRCC3 Gene PCR-RFLP | ||
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