母亲年龄相关的先天性心脏病风险是可修改的
Claire E Schulkey1, Suk D Regmi1, Rachel A Magnan1
1Department of Pediatrics, Washington University School of Medicine, St Louis, Missouri 63110 USA.
Nature
|April 2, 2015
概括
母亲年龄增加了先天性心脏病的风险,独立于染色体问题. 这项研究确定了这种风险的母体基础,这种风险可以通过母体炼来减轻.
科学领域:
- 发育生物学是发展生物学.
- 遗传学 是一个遗传学.
- 生殖医学是一种生殖医学.
背景情况:
- 母亲年龄是新生儿先天性心脏病 (CHD) 的已知危险因素,即使没有染色体异常.
- 这种与年龄相关的风险的根本原因,无论是母体还是卵细胞相关的,仍然不清楚.
- 之前的研究已经确定了Nkx2-5基因突变作为研究小鼠对心脏病产妇年龄影响的模型.
研究的目的:
- 研究母亲对与年龄相关的先天性心脏病风险的贡献.
- 探索潜在的机制,包括饮食和遗传学,影响这种风险.
- 确定可以减轻与母亲年龄相关的CHD风险的干预措施.
主要方法:
- 在携带Nkx2-5突变的年轻和老雌性小鼠之间进行相互的卵巢移植.
- 管理高脂肪饮食,以评估它们对母亲衰老的影响.
- 分析母亲的菌株背景,以评估遗传影响.
- 为不同生命阶段的母亲实施自愿运动计划.
主要成果:
- 卵巢移植证实了老鼠与年龄相关的冠心病风险的母体基础.
- 高脂肪饮食并没有加剧母亲衰老的影响,这表明高血糖和肥胖不是主要的驱动因素.
- 风险证明了由母亲的菌株背景影响的定量遗传变异.
- 随意炼,无论开始时间如何,在老年母亲中显著降低了心脏病风险.
结论:
- 这项研究在Nkx2-5小鼠模型中确定了与年龄相关的心脏病风险的母性来源,而不是卵细胞特异性来源.
- 母亲的生活方式干预,特别是运动,可以有效地降低后代的心脏病风险,即使存在遗传倾向.
- 这些发现凸显了以母亲为中心的策略在预防先天性心脏缺陷方面的潜力.
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