胎盘和胎儿代谢重编程在怀孕时与子宫内生长限制
Francesca Innocenti1,2, Rosa Teresa Scaramuzzo1, Federica Lunardi3
1Neonatology Unit, Azienda Ospedaliero-Universitaria Pisana, Pisa, Italy.
Reproductive sciences (Thousand Oaks, Calif.)
|December 18, 2024
概括
在早产胎儿的子宫内生长限制 (IUGR) 引发了代谢变化,以增强氧气使用和葡萄糖生产,适应胎盘不足. 这些适应性在短期内消失,这表明氧气可用性驱动胎儿代谢重编程.
科学领域:
- 围产儿医学 围产儿医学
- 胎儿生理学 胎儿生理学
- 生物化学 生化学
背景情况:
- 高海拔低氧模型揭示了胎盘对胎儿存活的补偿机制,由低氧诱导因子-1介导.
- 宫内生长限制 (IUGR) 呈现了一个临床场景,可能涉及类似的胎盘和胎儿适应.
- 了解这些机制对于管理因IUGR而复杂的怀孕至关重要.
研究的目的:
- 调查是否和何时补偿机制,类似于高海拔低氧时的补偿机制,在患有IUGR的胎儿中被激活.
- 描述受IUGR影响的胎儿的代谢概况,与非IUGR对照进行比较.
- 确定妊娠年龄对这些适应性反应的影响.
主要方法:
- 追溯观察性研究,利用早产和满产新生儿的带血液样本.
- 分析胎儿代谢状态,包括氧气,葡萄糖,乳酸和二氧化碳水平.
- 具有和没有IUGR的新生儿之间的代谢参数的比较.
主要成果:
- 早产IUGR胎儿的胎盘氧气和葡萄糖供应减少,乳酸和二氧化碳增加.
- IUGR胎儿显示氧气提取增加和乳酸生产减少.
- 这些代谢差异随着怀孕接近终期而减少.
结论:
- 在早产IUGR怀孕中,低流的胎盘会诱导新陈代谢重编程,有利于糖溶解以维持胎儿的氧化,尽管葡萄糖降低.
- 过早的IUGR胎儿激活了需要能量的葡萄糖生成.
- 这些适应在短期内得到解决,可能是由于胎盘衰老增加了胎盘氧气的可用性,而氧气是代谢重编程的关键驱动因素.
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