脱脂牛奶摄入量降低了ER乳腺癌的风险:孟德尔的随机化分析
Yingdan Huang1, Wangjin Zhang2, Jinghui Chen2
1Department of Lymphoma Medicine, Hubei Cancer Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430079, China.
Discover oncology
|November 2, 2024
概括
脱脂牛奶的消费显示出对雌激素受体阴性乳腺癌的保护作用,可能由体重指数 (BMI) 介导. 摄入全奶牛奶似乎不会影响乳腺癌风险.
科学领域:
- 遗传学 遗传学 是一个
- 流行病学 流行病学
- 营养科学 营养科学
背景情况:
- 观察性研究表明,牛奶消费与乳腺癌 (BC) 之间存在联系.
- 之前关于牛奶摄入量和BC风险的孟德尔随机化 (MR) 研究得出了不确定的结果.
- 潜在的混因素,如牛奶类型,雌激素水平和BC亚型,需要进一步调查.
研究的目的:
- 调查脱脂和全奶油牛奶消费与乳腺癌风险之间的因果关系.
- 为了区分牛奶类型对各种乳腺癌亚型的影响.
- 探索乳-BC关系中的潜在调解因素,使用两个样本和两个阶段的MR.
主要方法:
- 利用了来自360,806名欧洲人的全基因组关联研究 (GWAS) 数据.
- 使用反变量权重 (IVW),MR-Egger和权重中位数方法进行了两样本的门德尔随机化 (MR).
- 进行了敏感性分析,包括留出一个,科克兰的Q测试和MR-Egger拦截分析;使用两步MR来评估调解.
主要成果:
- 两个样本的MR表明脱脂牛奶与整体BC风险之间存在逆因果关系 (IVW:OR 0.34,P=0.05).
- 脱脂牛奶消费与降低雌激素受体阴性 (ER-) BC的风险有关 (IVW:OR 0.18,P=0.04;MR Egger:OR 0.006,P=0.04).
- 没有发现脱脂牛奶和ER+BC之间,也没有发现全奶牛奶和任何BC类型之间有显著的关联.
结论:
- 这些发现支持脱脂牛奶对ER-乳腺癌的保护作用.
- 体重指数 (BMI) 可能部分调解脱脂牛奶对ER-BC风险的保护作用.
- 没有证据表明全奶牛奶消费与乳腺癌风险之间存在因果关系.
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