维生素E摄入量与COMT基因变异对韩国成年人结肠直肠癌风险的相互作用:一个病例对照研究
Shinyoung Jun1, Madhawa Gunathilake1, Jeonghee Lee1
1Department of Cancer Biomedical Science, National Cancer Center Graduate School of Cancer Science and Policy, Goyang, Korea.
Epidemiology and health
|November 17, 2023
概括
饮食中摄入维生素E可能会降低结肠直肠癌 (CRC) 风险,但这种效果受到特定基因变异的影响. 甲基转移酶 (COMT) 基因多态性改变了维生素E对CRC发育的影响.
科学领域:
- 营养流行病学 营养流行病学
- 癌症遗传学 癌症遗传学
- 分子流行病学分子流行病学
背景情况:
- 以前的研究表明,关于维生素E抗癌作用的结果不一致.
- 生物可信性和流行病学数据表明,维生素E具有保护作用.
- 甲基转移酶 (COMT) 基因和维生素E之间的相互作用可能解释了不一致的发现.
研究的目的:
- 调查COMT基因变异是否调节饮食维生素E摄入量与结直肠癌 (CRC) 风险之间的关联.
- 探索COMT基因型和维生素E对CRC发育的相互作用作用.
主要方法:
- 一项涉及975名韩国成年CRC患者和975名匹配对照者的病例控制研究.
- 饮食维生素E密度使用食物频率问卷进行评估.
- 在COMT单核酸多态 (SNP) rs740603中进行了基因型定型,并通过组织学证实了CRC.
主要成果:
- 饮食中维生素E密度较高与CRC风险降低有关.
- 这种反向关联在具有COMT SNP rs740603.3至少一个"A"等位基因的个体中是显著的.
- 在COMT rs740603基因型和维生素E密度之间观察到与CRC风险相关的显著相互作用.
结论:
- 这些发现表明,COMT基因中的特定遗传多态性影响了饮食中维生素E摄入量与CRC风险之间的关系.
- 这种遗传变异可能是理解以前维生素E干预试验不一致结果的关键因素.
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