Dev Cell:心脏再生过程中的冠状动脉血管重建受心外膜和心内膜线索的调控,并形成心肌细胞再增殖的支架

2020-07-13 MedSci原创 MedSci原创

冠状动脉网功能缺陷和供血不足是心肌梗死的原因和后果。梗死后有效的血管重建是支持组织修复和功能的关键。斑马鱼的心脏表现出非凡的再生能力,冠状动脉血管重建在损伤后数小时内启动,但这一过程是如何调节的仍然未

冠状动脉网功能缺陷和供血不足是心肌梗死的原因和后果。梗死后有效的血管重建是支持组织修复和功能的关键。斑马鱼的心脏表现出非凡的再生能力,冠状动脉血管重建在损伤后数小时内启动,但这一过程是如何调节的仍然未知。

 

在这里,我们表明,血管重建需要一个协调的多组织反应,最终形成一个复杂的血管网络,可作为心肌细胞再繁殖的支架。在这个过程中,我们称之为 "冠状动脉-心内膜锚定",新的冠状动脉通过(1)在再生的心外膜表面和(2)在心室内向被激活的心内膜方向生长。从机制上讲,浅表的血管再生是由心外膜Cxcl12-Cxcr4信号和心内膜Vegfa信号引导的。

 

总之,我们的研究结果表明,损伤激活的心外膜和心内膜支持心肌细胞补充最初是通过冠状动脉萌发的引导。在受伤的哺乳动物心脏中模拟这一过程应该有助于其愈合。

 

原始出处:

 

Rubén Marín-Juez, Hadil El-Sammak, et al., Coronary Revascularization During Heart Regeneration Is Regulated by Epicardial and Endocardial Cues and Forms a Scaffold for Cardiomyocyte Repopulation. Dev Cell. 2019 Nov 18;51(4):503-515.e4. doi: 10.1016/j.devcel.2019.10.019.

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    2021-01-25 维他命
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    2020-07-23 fzwish20000

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