怀孕与年轻女性更快的表观遗传衰老有关
Calen P Ryan1, Nanette R Lee2, Delia B Carba2
1Robert N. Butler Columbia Aging Center, Mailman School of Public Health, Columbia University, New York, NY 10032.
概括
通过表观遗传钟测量,生殖努力加速了女性的生物衰老. 怀孕与更快的细胞衰老有关,即使在年轻人中也是如此,但在男性中没有观察到这种效应.
科学领域:
- 进化生物学是进化的生物学.
- 老年学是一门学科.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 进化论认为,生殖和体质维护之间存在一种权衡,导致加速衰老.
- 以前的研究将女性高生育率与寿命缩短和健康状况下降联系在一起,但生物衰老比观察到的健康状况下降更早开始.
- 表观遗传钟提供了一种独立于发病率和死亡率测量生物衰老的方法.
研究的目的:
- 研究年轻男女生殖史与生物衰老之间的关系.
- 为了确定怀孕是否加速生物衰老,在高生育率的人群中通过表观遗传钟检测到.
- 检查生殖变化和表观遗传衰老之间的纵向关联.
主要方法:
- 采用了塞浦路斯长度健康和营养调查 (n=1,735) 的数据,包括年轻男女 (20-22岁).
- 使用六个经过验证的表观遗传钟量化生物衰老.
- 评估了怀孕 (怀孕数量) 与女性表观遗传衰老措施之间的横截面和纵向关联,以及男性的父亲史.
主要成果:
- 在截面上,更高的怀孕与女性所有六个时钟的加速表观遗传衰老有关 (n=825).
- 在女性的两个表观遗传钟 (n=331) 中,妊娠的纵向增加与加速衰老相关.
- 在男性 (n=910) 怀孕与表观遗传衰老之间没有发现任何关联.
结论:
- 怀孕似乎加快了生物衰老,正如表观遗传钟所证明的那样,即使是来自高生育率环境的年轻女性.
- 这些发现支持了生殖衰老权衡的进化假设.
- 观察到的效应与各种混因素相抗衡,突出显示了怀孕对生物衰老的直接影响.
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