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人体体质的复构和解构 in vitro

Yuchuan Miao^1,2, Yannis Djeffal^1,2, Alessandro De Simone³

¹Department of Genetics, Harvard Medical School, Boston, MA, USA.

|December 21, 2022

概括

研究人员开发了人类干细胞模型来研究脊椎和肌肉的前体如何形成不同的隔间. 这揭示了细分时钟如何驱动脊椎动物早期的空间组织.

科学领域:

发育生物学
干细胞生物学
人类胚胎的形成

背景情况:

脊椎动物的发育特征在脊柱和神经中显而易见.
索米特是从前皮层中形成的节奏,对这种组织至关重要,并被分为前后部分以形成图案.
确切的部分细分和前后认同机制尚不清楚.

研究的目的:

调查前部和后部体腔的形成.
了解分段时钟在将时间模式转化为空间组织中的作用.
在体外探索关键的体质生成模式模块的独立运作.

主要方法:

开发3D人类多能干细胞培养系统 (somitoid和segmentoid).
一个类似于索米特的结构形成的复述,具有前后认同.
对包括MESP2在内的基因表达模式和细胞分类机制的分析.

主要成果:

索米体和细分体成功模拟了索米体形成和前后认同.
分段时钟将时间振荡转换为体内部分的空间规律.
一个活跃的细胞分类机制将"盐和胡"MESP2表达转化为不同的前/后隔.
关键的模式模块 (时钟,波面,极性,上皮化) 可以在体外独立运行.

结论:

定义了对称性破坏和索米特极性模式的启动框架.
这项研究为了解体质生成的一般原理提供了一个平台.
这项研究提升了人类发展的知识,并提供了有关脊椎动物细分的见解.

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