Risk Factors for Colon Cancer in Northeastern Thailand : Interaction of MTHFR Codon 677 and 1298 Genotypes with Environmental Factors
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概要
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Background: Polymorphisms in methylenetetrahydrofolate reductase (MTHFR), such as MTHFR C677T and A1298C, are associated with several cancers. This study aimed to evaluate the effects of MTHFR polymorphisms on colon cancer risk and possible interactions with environmental factors in a population from northeastern Thailand.Methods: This hospital-based case–control study was conducted during 2002–2006; 130 colon cancer cases and 130 age- and sex-matched controls were enrolled. Information was collected and blood samples were obtained for assay of MTHFR C677T and A1298C polymorphisms by polymerase chain reaction with restriction fragment length polymorphism techniques. Associations between variables of interest and colon cancer were assessed using conditional logistic regression.Results: Increased risk of colon cancer was associated with alcohol consumption and bowel habits. Alcohol drinkers who consumed ≤0.50 or >0.50 units of alcohol per day had elevated risks (ORadj = 3.5; 95% CI: 1.19–10.25 and ORadj = 1.71; 95% CI: 0.74–3.96, respectively). The risk was also higher in subjects with frequent constipation (11.69; 2.18–62.79) and occasional constipation (3.43; 1.72–6.82). An interaction was observed between the MTHFR C677T polymorphism and freshwater fish consumption on colon cancer risk (P value for interaction = 0.031). Interactions were observed between the MTHFR A1298C polymorphism and bowel habits, family history of cancer, alcohol consumption, and beef consumption on colon cancer risk (P-value for interaction = 0.0005, 0.007, 0.067, 0.003, respectively).Conclusions: In a Thai population, colon cancer risk was associated with alcohol and beef consumption, bowel habits, and family history of cancer. Interactions between MTHFR polymorphisms and environmental factors were also observed.
- 2010-07-01
著者
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Moore Malcolm
名古屋市立大学 公衆衛
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Moore Malcolm
Uicc Asian Regional Office For Cancer Control
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Tokudome Shinkan
National Institute Of Health And Nutrition
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PROMTHET Supannee
Department of Epidemiology, Faculty of Public Health, Khon Kaen University
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PIENTONG Chamsai
Department of Microbiology, Faculty of Medicine, Khon Kaen University
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EKALAKSANANAN Tipaya
Department of Microbiology, Faculty of Medicine, Khon Kaen University
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WIANGNON Surapon
Cancer Unit, Faculty of Medicine, Khon Kaen University
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POOMPHAKWAEN Kirati
Faculty of Science and Technology, Loei Rajabhat University
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SONGSERM Nopparat
Department of Epidemiology, Faculty of Public Health, Khon Kaen University
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CHOPJITT Peechanika
Department of Microbiology, Faculty of Medicine, Khon Kaen University
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Ekalaksananan Tipaya
Department Of Microbiology Faculty Of Medicine Khon Kaen University
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Poomphakwaen Kirati
Faculty Of Science And Technology Loei Rajabhat University
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Pientong Chamsai
Department Of Microbiology Faculty Of Medicine Khon Kaen University
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Promthet Supannee
Department Of Epidemiology Faculty Of Public Health Khon Kaen University
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Songserm Nopparat
Department Of Epidemiology Faculty Of Public Health Khon Kaen University
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Chopjitt Peechanika
Department Of Microbiology Faculty Of Medicine Khon Kaen University
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Wiangnon Surapon
Cancer Unit Faculty Of Medicine Khon Kaen University
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