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收稿:2018-03-13,
纸质出版:2018-06
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龙琦, 陈维艳, 王灵巧, 等. 乙醇代谢通路基因拷贝数变异与结直肠癌易感性的关联分析[J]. 第三军医大学学报, 2018,40(11):991-997.
Qi LONG, Weiyan CHEN, Lingqiao WANG, et al. Association of copy number variation in ethanol metabolic pathway genes with susceptibility of colorectal cancer[J]. Journal of Third Military Medical University, 2018, 40(11): 991-997.
龙琦, 陈维艳, 王灵巧, 等. 乙醇代谢通路基因拷贝数变异与结直肠癌易感性的关联分析[J]. 第三军医大学学报, 2018,40(11):991-997. DOI: 10.16016/j.1000-5404.201803097.
Qi LONG, Weiyan CHEN, Lingqiao WANG, et al. Association of copy number variation in ethanol metabolic pathway genes with susceptibility of colorectal cancer[J]. Journal of Third Military Medical University, 2018, 40(11): 991-997. DOI: 10.16016/j.1000-5404.201803097.
Objective
2
To investigate the relationship of the copy number variation (CNV) of 3 metabolic pathway genes for ethanol
alcohol dehydrogenase 1B (ADH1B)
aldehyde dehydrogenase-2 (ALDH2) and cytochrome P450 2E1 (CYP2E1) with the susceptibility of colorectal cancer (CRC) in the population living in the Southwest China.
Methods
2
A total of 449 CRC patients and 449 cancer-free controls were recruited during 2001 and 2004 from the 3 affiliated hospital of Army Medical University. The copy number of the 3 candidate genes were tested with a multiplex gene copy number quantitation method AccuCopy
TM
. Then 10% samples were further verified for the copy number. Unconditional logistic regression analysis was applied to evaluate the association between germline CNV genotypes and CRC risk.
Results
2
There was no significant difference in the gene copy number of both ADH1B and ALDH2 between CRC patients and normal controls
and the number was 2 copies. While the copy number of CYP2E1 had significantly different distribution between the CRC patients and control subjects (
P
=0.046). Moreover
logistic regression analysis showed that the gain of CYP2E1 was a risk factor for CRC (
OR
=2.47
95%
CI
:1.04~5.85
P
=0.041). A further assessment for possible modifications of surrounding factors in a stratification analysis indicated that a positive association of CYP2E1 gain and CRC risk was found in subpopulations of older than 50 years
colon cancer
and daily ethanol consumption ≤ 50 g.
Conclusion
2
The gain of CYP2E1 copy number is associated with CRC in the population in the Southwest China.
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