在小鼠中,胎盘mTOR信号链接线粒体功能障碍,营养物质运输和新生儿β细胞干扰
Megan Beetch1, Eunice Oribamise1,2, Seokwon Jo1
1Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, MN, USA.
Diabetologia
|October 8, 2025
概括
胎盘mTOR缺乏导致胎儿生长限制和β细胞功能障碍. 这种编程导致成年雌性后代对肥胖和胰岛素抵抗的易感性增加.
科学领域:
- 生殖生物学 生殖生物学
- 代谢健康 代谢健康
- 发展规划是指发展规划.
背景情况:
- 胎内环境显著影响胎儿代谢健康编程.
- 胎盘中拉巴胺素 (mTOR) 的机械标是胎儿生长和后代代谢编程的关键调节者,但其精确的机制尚不清楚.
研究的目的:
- 调查胎盘mTOR在调节胎儿生长,胎盘功能和胰腺β细胞发育编程中的作用.
- 阐明胎盘mTOR缺乏影响后代代谢健康的机制.
主要方法:
- 利用胎盘mTOR缺乏的小鼠模型来诱导胎儿生长限制 (FGR).
- 评估了胎盘线粒体功能,营养物质运输体表达和白素流量.
- 检查了胎儿和成年后代的胰腺β细胞大小,增殖和胰岛素分泌.
主要成果:
- 胎盘mTOR缺乏导致FGR和胎盘线粒体缺陷.
- 胎盘mTOR缺陷的雌性胎儿显示营养物质运输体表达和白流量增加,以及循环胰岛素减少和β细胞大小/增殖增加.
- 成年雌性后代对饮食诱导的肥胖,胰岛素耐药性和β细胞反应受损的敏感性增加.
结论:
- 胎盘mTOR在胎儿对代谢健康的编程中起着至关重要的作用.
- 胎盘功能障碍和因mTOR缺乏而改变的氨基酸运输与不适当的β细胞发育和长期代谢后果有关.
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