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从小鼠原始ESC产生的合成胚胎
Shadi Tarazi1, Alejandro Aguilera-Castrejon1, Carine Joubran1
1Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 76100, Israel.
Cell
|August 21, 2022
概括
研究人员从培养的干细胞中创建了合成小鼠胚胎模型 (胚胎),成功地模仿了胚胎和胚胎外发育. 这表明多能细胞在发育生物学中的自我组织潜力.
科学领域:
- 发育生物学
- 干细胞生物学
- 合成胚胎学
背景情况:
- 在体外培养的干细胞可以促进胚胎和胚胎外组织的形成.
- 培养干细胞独立形成整个胃化胚胎状结构的能力尚不清楚.
研究的目的:
- 确定培养的干细胞是否能够产生具有胚胎和胚胎外的完整的胃化胚胎状结构.
- 使用合成胚胎模型模拟哺乳动物胚胎发育.
主要方法:
- 对自然胚胎的外胚生长平台的调整.
- 原始胚胎干细胞 (ESC) 与短暂表达Cdx2或Gata4的ESC共同聚合
- 从ESC生成小鼠胃化后全合成胚胎模型 (sEmbryos).
主要成果:
- 胚胎成功经历了胃化并通过了关键的发育里程碑.
- 在复杂的胚胎外体内发育的器官祖先,类似于E8.5小鼠胚胎.
- 证明了整个哺乳动物胚胎的功能复制和建模.
结论:
- 纯粹的多能细胞具有显著的可塑性,可以自我组织成复杂的结构.
- 合成胚胎模型可以重复哺乳动物胃化后发育的关键阶段.
- 这项研究为研究早期哺乳动物胚胎形成提供了一个新平台.
相关概念视频
00:58Embryonic Stem Cells
Embryonic stem (ES) cells are undifferentiated pluripotent cells, meaning they can produce any cell type in the body. This gives them tremendous potential in science and medicine since they can generate specific cell types for use in research or to replace body cells lost due to damage or disease.
00:57Embryonic Stem Cells
Embryonic stem (ES) cells were first discovered in mice in 1981 by Martin Evans. In 1998, James Thomson identified a method to isolate embryonic stem cells from humans. Human embryonic stem cells (hESCs) are obtained from 3-5 day old embryos that remain unused after an in vitro fertilization procedure.
ES cells are grown in a culture medium where they can divide indefinitely, creating ES cell lines. Under certain conditions, ES cells can differentiate, either spontaneously into a variety of...
ES cells are grown in a culture medium where they can divide indefinitely, creating ES cell lines. Under certain conditions, ES cells can differentiate, either spontaneously into a variety of...