胆囊癌风险和南美土著马普切祖先:使用祖先信息标记器的仪器变量分析
Linda Zollner1,2, Felix Boekstegers1, Carol Barahona Ponce1
1Statistical Genetics Research Group, Institute of Medical Biometry, Heidelberg University, 69120 Heidelberg, Germany.
Cancers
|August 26, 2023
概括
更高的马普切祖先因果上增加了胆囊癌 (GBC) 的风险,由胆结石介导. 这一发现,没有混,支持原住民南美遗产人口的祖先知情的GBC预防策略.
科学领域:
- 人口遗传学 人口遗传学
- 癌症流行病学癌症流行病学
- 遗传流行病学遗传流行病学
背景情况:
- 观察性研究报告说,马普切族祖先与胆囊癌 (GBC) 风险之间存在强烈的联系.
- 智利是世界上GBC发病率最高的国家,马普切族是最大的土著族群.
- 以前的关联可能会被其他因素所混.
研究的目的:
- 评估马普切祖先比例对GBC风险的无混影响.
- 调查胆结石疾病和身体质量指数 (BMI) 在这种关联中的调解作用.
主要方法:
- 两个样本的门德尔随机化 (MR) 分析使用马普切祖先的遗传标记作为仪器变量.
- 选择有信息的遗传标记,用于祖先的分配.
- 进行了补充敏感性分析.
主要成果:
- 确定了马普切族祖先对GBC风险的假定因果作用 (0.8%的风险增加每1%的祖先增加,P = 6.7 × 10-5).
- 马普切族祖先也因果上增加了胆结石疾病的风险 (3.6%的风险增加),这表明调解.
- 马普切族祖先对BMI有负面影响 (-0.006 kg/m2).
结论:
- 马普切祖先与GBC风险之间的关联可能是因果关系,而不是由于混.
- 胆结石疾病调解了马普切祖先与GBC风险之间的关系.
- 以祖先为基础的预防策略可以提高相关人群的GBC预防效率.
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