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人类胚胎肢体细胞图谱在空间和时间上解析

Bao Zhang¹, Peng He^2,3, John E G Lawrence^3,4

¹The Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.

|December 6, 2023

概括

人类肢体的发育涉及从祖细胞到不同的细胞类型的细胞多样化. 这项研究使用先进的转录学绘制了人类胚胎肢体的发育图,揭示了新的细胞群和基因表达模式.

科学领域:

发育生物学
基因组学
人类胚胎学

背景情况:

人类肢体的发育是一个复杂的过程,
之前的研究很大程度上依赖于模型生物,人类肢体的发展特征很差.
这种先天性肢体变化凸显了这个发育过程的复杂性.

研究的目的:

提供人类胚胎肢体在空间和时间上的深入描述.
在人类四肢形成过程中识别新的细胞群和基因表达模式.
将人类肢体的发育与模型生物进行比较.

主要方法:

用单细胞和空间转录组来分析人类胚胎肢体的发育.
VisiumStitcher被用来组装解剖学连续的空间转录样本.
在小鼠胚胎肢体上进行单细胞RNA测序以进行跨物种比较.

主要成果:

从多能原始细胞向差异化细胞状态,包括新型种群的广泛细胞多样化.
发现了由不同的基因表达程序调节的人类肌肉发育的两个不同的波.
确定肌肉素 (MSC) 作为肌肉干细胞身份的关键调节剂,并绘制与四肢形相关的基因分离.

结论:

这项研究提供了人类胚胎肢体发育的综合空间时间图.
揭示了肌肉发育,干细胞调节以及肢体形的遗传基础.
在人类和小鼠的胚胎肢体发育之间发现了显著的同质性,从而促进了跨物种的比较.

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