胎盘线粒体单载体调节后代对代谢功能障碍的敏感性
Seokwon Jo1, Grace Chung1, Yu-Jin Youn1
1Department of Integrative Biology & Physiology, University of Minnesota Medical School, Minneapolis, MN, USA.
Molecular metabolism
|August 23, 2025
概括
胎盘线粒体功能影响后代代谢. 在女性胎盘中删除线粒体单载体 (MCU),改善成年女性后代
科学领域:
- 线粒体生物学
- 发育生物学
- 代谢健康
背景情况:
- 线粒体调节新陈代谢,但它们对胎盘功能和长期后代健康的作用尚不清楚.
- 线粒体功能障碍与妊娠并发症有关.
- 线粒体单载体 (MCU) 是线粒体吸收和功能的关键.
研究的目的:
- 研究胎盘线粒体功能,特别是MCU在塑造后代代谢和长期健康方面的作用.
- 确定胎盘特异性MCU删除如何影响后代的代谢轨迹.
- 评估受损的胎盘线粒体处理对成年代谢表型的影响.
主要方法:
- 使用一种带有胎盘特异性的线粒体单载体 (Pl-MCUKO) 遗传小鼠模型.
- 在成年后代中评估了基线和饮食诱导的代谢表型.
- 分析了胎盘线粒体呼吸,代谢学和转录学.
- 评估葡萄糖平衡,胰岛素耐受性,体重和脂肪.
主要成果:
- 开始时,女性胎盘热囊细胞的呼吸率高于男性.
- 胎盘的MCU缺失导致女性胎盘的线粒体功能受损,改变了蛋白质和脂质代谢.
- 导致胎盘变小,胚胎体重减少,但出生后生长正常化.
- 成年Pl-MCUKO雌性在高脂肪饮食中表现出更好的代谢健康,包括减轻体重增加,更好的葡萄糖/胰岛素耐受性和增加活动.
- 这种新陈代谢改善与胰腺β细胞质量减少但功能保留有关.
结论:
- 胎盘线粒体处理会影响雌性后代的长期代谢健康.
- 胎盘中MCU的特定删除可以赋予雌性后代代的代谢弹性,特别是在代谢压力下.
- 这些发现突显出胎盘线粒体是后代代谢编程的关键调节者.
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