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父母BMI与后代肥胖之间的关联:对三重组的基因分析
Liam Wright1, Gemma Shireby1, Tim T Morris1
1Centre for Longitudinal Studies, Social Research Institute, University College London, London, United Kingdom.
PLoS genetics
|August 5, 2025
概括
母体体重指数 (BMI) 通过直接的遗传和间接的"遗传培养"效应显著影响后代的BMI. 父亲的BMI是指父亲的BMI.
科学领域:
- 遗传学 是一个遗传学.
- 儿科 儿科 儿科
- 公共卫生 公共卫生
背景情况:
- 儿童肥胖与父母肥胖相关,有建议的环境因素,如胎儿编程和育儿.
- 身体质量指数 (BMI) 是遗传的,这表明遗传因素有助于儿童和父母的BMI相关性.
- 母亲的BMI与后代的BMI的关联,独立于直接的遗传遗传,需要进一步调查,包括父亲的BMI和饮食.
研究的目的:
- 研究母亲和父亲的BMI在后代的BMI,出生体重和饮食中的作用.
- 使用孟德尔随机化区分直接的遗传效应和间接的遗传培养效应.
- 将孟德尔随机化结果与标准回归分析进行比较.
主要方法:
- 使用了孟德尔随机化 (MR) 和来自2630个英国家庭的遗传三组数据 (母亲-父亲-后代).
- 采用BMI的多基因指数来衡量父母的BMI,对后代的PGI进行调节以隔离遗传影响.
- 使用表型BMI数据,将MR结果与多变量回归进行了比较.
主要成果:
- 孕产妇的BMI在MR和表型分析中都显示出与后代BMI的一致关联.
- 父亲的BMI与后代的BMI的关联在MR分析中几乎为零,这表明表型估计中的潜在偏差.
- 母亲间接遗传影响对后代的BMI总遗传影响贡献了25-50%;饮食显示出有限的关联.
结论:
- 母亲的BMI在后代的BMI中起着重要作用,由直接的遗传和间接的遗传培养中介.
- 如果不考虑直接的遗传遗传,父亲的BMI与后代肥胖的表型关联可能会被高估.
- 需要在更大的队列中进行进一步的研究,以验证这些关于母亲和父亲对后代BMI的影响的发现.
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