胎盘细胞外囊泡促进心肌细胞成熟和胎儿心脏发育
Mariyan J Jeyarajah1, Violet S Patterson1, Gargi Jaju Bhattad1
1Department of Anatomy and Cell Biology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada.
Communications biology
|October 3, 2024
概括
胎盘通过热囊细胞干细胞释放的细胞外囊泡与发育中的胎儿心脏进行通信. 这种信号促进心率和心上细胞的生长,这对正常的心脏发育至关重要.
科学领域:
- 发育生物学是发展生物学.
- 心血管科学 心血管科学
- 生殖生物学 生殖生物学
背景情况:
- 先天性心脏缺陷是新生儿死亡的主要原因.
- 胎盘异常经常与先天性心脏缺陷有关.
- 连接胎盘功能和胎儿心脏发育的确切机制仍然不清楚.
研究的目的:
- 在小鼠模型中研究胎盘和发育中的胎儿心脏之间的信号网络.
- 确定影响胎儿心脏发育和功能的胎盘因素.
主要方法:
- 培养的胎儿小鼠心脏被暴露在来自胎盘组织和热囊细胞干细胞的条件介质中.
- 使用了具有和没有OVO-Like 2的热细胞干细胞.
- 从热囊细胞中分离出细胞外囊泡,并应用于胎儿的心脏.
主要成果:
- 来自分化的热囊细胞干细胞的介质,但不是未分化的细胞,胎儿心率增加和心表细胞外生长.
- 这种效应取决于细胞干细胞中的OVO-Like 2表达.
- trofhoblasts 释放的细胞外囊泡足以调解这些心脏促进作用.
结论:
- 胎盘与胎儿的心脏通过分化热囊细胞干细胞分泌的细胞外囊泡进行通信.
- 这种胎盘信号通路对于促进心脏形态发生是必不可少的.
- 研究结果提供了关于胎盘功能障碍如何导致先天性心脏缺陷的见解.
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