胎儿遗传决定的出生体重在早期的青春期中起着因果作用:来自人类遗传研究的证据
Qinghui Peng1, Wenjuan Qiu2, Zengjun Li1
1Department of Epidemiology and Health Statistics, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, China.
Human reproduction (Oxford, England)
|February 22, 2024
概括
较低的胎儿基因决定的出生体重与更早的青春期发作有因果关系. 这一发现,独立于母亲的环境,支持疾病的胎儿起源假设.
科学领域:
- 遗传学 是一个遗传学.
- 生殖内分泌学 生殖内分泌学
- 发育生物学 发展生物学
背景情况:
- 以前的研究表明出生体重和青春期的时间之间存在联系,但没有区分胎儿和母亲的遗传影响.
- 门德尔随机化 (MR) 研究受到了来自母亲和胎儿遗传影响之间未解决的相关性潜在偏差的限制.
- 胎儿基因组变异解释了出生体重的比例比母亲基因组更大.
研究的目的:
- 为了研究胎儿基因决定的出生体重对青春期的时间的因果关系.
- 为了区分直接的胎儿遗传对出生体重的影响与间接的孕产妇子宫内环境影响.
- 探索儿童体重指数 (BMI) 在这种关系中的潜在调解作用.
主要方法:
- 两个样本的门德尔随机化 (MR) 分析使用大规模的全基因组关联研究 (GWAS) 总结数据进行.
- 确定了与胎儿出生体重相关的遗传变异,并调整了母亲的遗传影响.
- 用MR调解和MR集群分析来评估因果关系和儿童BMI的潜在调解.
主要成果:
- 胎儿基因决定的出生体重下降1个标准偏差 (SD) 与更早发育的0.16年有关.
- 多变量MR分析证实胎儿出生体重对青春期时间的直接影响,较低的出生体重与0.23年更早的开始有关.
- 很少有证据支持儿童BMI作为出生体重和青春期时间之间的调解者.
结论:
- 由胎儿基因组决定的低出生体重与更早的青春期发生有关.
- 这些发现支持疾病的胎儿起源假设.
- 结果强调了考虑到胎儿遗传决定因素在理解青春期时间的重要性.
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