NATURE:心脏发生的单细胞分析揭示了器官水平发育缺陷的基础

2019-07-27 海北 MedSci原创

器官发生涉及多种细胞类型的整合。细胞类型特异性基因网络的失调导致出生缺陷,其影响5%的活产。先天性心脏缺陷是最常见的畸形。

器官发生涉及多种细胞类型的整合。细胞类型特异性基因网络的失调导致出生缺陷,其影响5%的活产。先天性心脏缺陷是最常见的畸形,并且是由心脏祖细胞的离散子集的破坏引起的,但至今为止,导致器官水平缺陷的个体祖细胞的转录变化仍然未知。

在这里,研究人员使用单细胞RNA测序来分析早期心脏祖细胞,因为它们在正常和异常心脏发生过程中变得特异,揭示了特定细胞亚群的失调如何具有灾难性后果。

用于单细胞RNA测序分析的基于网络的计算方法预测谱系指定的转录因子,将Hand2鉴定为流出道细胞但不是右心室细胞的特异性,尽管Hand2-null小鼠中右心室形成失败。

Hand2-null胚胎的时间单细胞转录组分析揭示了流出道心肌特异化的失败,而右心室心肌被指定,但未能正确分化和迁移。 

Hand2的丧失还导致视黄酸信号传导失调和心脏祖细胞的前 - 后模式的破坏。

这项工作揭示了指定个体心脏祖细胞中命运和分化的转录决定因子,并阐述了单细胞分辨率下破坏心脏发育的机制,为研究先天性心脏缺陷提供了框架。


原始出处:

de Soysa TYet al. Single-cell analysis of cardiogenesis reveals basis for organ-level developmental defects. NATURE, 2019; DOI: 10.1038/s41586-019-1414-x.


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    2019-10-03 liye789132251
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    2019-08-21 天地飞扬

    学习

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    2019-07-29 neurowu

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