基因风险评分与不同出生群体的体重指数的关联
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Updated: Mar 18, 2026

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Assessment of Child Anthropometry in a Large Epidemiologic Study
Published on: February 2, 2017
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Stefan Walter1, Iván Mejía-Guevara2, Karol Estrada3
1Department of Epidemiology and Biostatistics, University of California, San Francisco.
JAMA
|July 6, 2016
概括
遗传倾向较高的体重指数 (BMI) 在较新的出生群体中具有更强的关联. 这表明环境因素,如肥胖流行, 改变基因对BMI的影响.
科学领域:
- 遗传学
- 流行病学
- 公共卫生
背景情况:
- 遗传变异与体重指数 (BMI) 有关,但它们的关联可能随着20世纪的肥胖流行而演变.
- 黑人和白人之间可能存在这些关联的差异.
- 肥胖环境对BMI的遗传倾向的影响需要进一步调查.
研究的目的:
- 确定最近出生群体中的个体是否具有更高的BMI遗传倾向.
- 通过出生队列来评估肥胖环境对BMI的遗传关联的影响.
主要方法:
- 一项观察性研究分析了来自健康和退休研究的8788名美国成年人 (1900-1958年出生).
- 在1992年至2014年间,身体质量指数 (BMI) 被评估了多达12次.
- 基于29个单核酸多态度计算出了多位基因风险评分 (GRS-BMI).
主要成果:
- 在白人 (0. 99%) 和黑人 (1. 37%) 参与者中,GRS-BMI与BMI显著相关.
- 在两种种族群体中,GRS-BMI与BMI之间的关联在较新的出生群体中更强烈.
- 例如,在1943年后出生的白人参与者中,较高的GRS-BMI与1.37个BMI单位的差异有关,而1924年之前出生的人则为0.17.
结论:
- BMI与遗传风险得分之间的关联在晚期出生群体 (1900-1958) 中增加.
- 这些发现表明肥胖的环境可能会改变已知的遗传变异对BMI的影响.
- 了解基因与环境的相互作用对于解决肥胖症至关重要.
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