1321-胚胎发育中轴前体形成的胚外细胞协同机制 episode artwork

EPISODE · Jul 23, 2026 · 21 MIN

1321-胚胎发育中轴前体形成的胚外细胞协同机制

from 聊聊Sci

这项研究通过微工程技术与干细胞共培养系统,成功构建了名为“disc-gastruloid”的人类早期胚胎模型,以此模拟原条形成的关键过程。研究揭示了三种胞外组织在发育中的协调作用:羊膜外胚层细胞诱导原条产生,滋养层干细胞抑制过度分化,而胚外中胚层干细胞则引导诱导出的细胞进行定向迁移。通过构建这种无血清、无外源因子的定义化培养环境,科学家不仅重现了人类胚胎早期的空间排布与分子互作,还实现了该模型向后期胚胎样结构的进一步发育。这一成果突破了人类早期原条形成阶段难以获取的伦理与实验限制,为探索人类发育的“黑匣子”时期提供了稳定且可操作的体外平台。借助单细胞转录组学分析,研究证实了该模型在细胞组成与基因表达谱上与真实人类胚胎高度相似。此外,研究还建立了一套高效获取并长期维持胚外中胚层干细胞的优化方案,进一步完善了人类早期发育的研究工具。References:Shen Q, Zhang X, Chen N, et al. Reconstituting human primitive streak formation through extra-embryonic cell coordination[J]. Cell, 2026.前往小宇宙评论区与主播互动

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1321-胚胎发育中轴前体形成的胚外细胞协同机制

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