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Common polymorphisms in 5-lipoxygenase and 12-lipoxygenase genes and the risk of incident, sporadic colorectal adenoma
Article first published online: 18 JAN 2007
Copyright © 2007 American Cancer Society
Volume 109, Issue 5, pages 849–857, 1 March 2007
How to Cite
Gong, Z., Hebert, J. R., Bostick, R. M., Deng, Z., Hurley, T. G., Dixon, D. A., Nitcheva, D. and Xie, D. (2007), Common polymorphisms in 5-lipoxygenase and 12-lipoxygenase genes and the risk of incident, sporadic colorectal adenoma. Cancer, 109: 849–857. doi: 10.1002/cncr.22469
- Issue published online: 22 FEB 2007
- Article first published online: 18 JAN 2007
- Manuscript Accepted: 29 NOV 2006
- Manuscript Revised: 27 NOV 2006
- Manuscript Received: 18 SEP 2006
- Public Health Service. Grant Numbers: R01 CA66539, R01 CA-51932
- National Cancer Institute
- National Center for Research Resources. Grant Number: RR017698
- National Institutes of Health
- Department of Health and Human Services
- Georgia Cancer Coalition Distinguished Cancer Scholar
- genetic polymorphisms;
- colorectal adenoma;
- lipoxygenase pathway;
- case-control study
Lipoxygenases (LOX) are major enzymes that metabolize arachidonic acid to hydroxyl-eicosatetraenoic acids and leukotrienes, which have been implicated in inflammation and colorectal cancer risk. Polymorphisms in LOX genes may influence their function and/or expression and, thus, may modify the risk for colorectal adenoma. The authors investigated the associations of 3 polymorphisms (2 in 5-LOX, −1708 guanineadenine and 21 cytosinethymine; and 1 in 12-LOX, arginine 261 glutamine [Arg261Gln]) in LOX genes with the risk of colorectal adenoma and also explored possible interactions of these polymorphisms with several inflammation-pathway or arachidonic acid metabolism-pathway related factors with the risk of colorectal adenoma.
By using data from a community-based, case-control study of incident, sporadic colorectal adenoma that included 162 cases and 211 controls, the authors constructed multiple logistic regression models to estimate the odds ratios (OR) and 95% confidence intervals (95% CI) of colorectal adenoma after adjusting for potential confounders.
Overall, there were no significant associations of the 2 5-LOX polymorphisms with the risk of colorectal adenoma. However, there was an inverse association between the Arg261Gln polymorphism in 12-LOX and colorectal adenoma (OR, 0.63; 95% CI, 0.40–1.00). A significant interaction also was observed between the 12-LOX polymorphism (Arg261Gln) and the use of nonsteroidal anti-inflammatory drugs (Pinteraction = .02).
The current results suggested that polymorphisms of LOX genes may act independently or with other factors to affect the risk of colorectal adenoma. Further studies will be needed to confirm these findings. Cancer 2007 © 2007 American Cancer Society.