Specialized endothelial tip cells guide neuroretina vascularization and blood-retina-barrier formation.

Specialized endothelial tip cells guide neuroretina vascularization and blood-retina-barrier formation.
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特殊的内皮细胞引导视网膜血管形成和血-视网膜屏障的形成。

DOI:
10.1016/j.devcel.2021.06.021
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发表时间:
2021-08-09
期刊:
影响因子:
11.8
通讯作者:
Dubrac, Alexandre
Dubrac, Alexandre
中科院分区:
生物学1区
文献类型:
--
作者:
Zarkada, Georgia;Howard, Joel P.;Xiao, Xue;Park, Hyojin;Bizou, Mathilde;Leclerc, Severine;Kunzel, Steffen E.;Boisseau, Blanche;Li, Jinyu;Cagnone, Gael;Joyal, Jean Sebastien;Andelfinger, Gregor;Eichmann, Anne;Dubrac, Alexandre

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引导组织血管化的内皮尖端细胞是血管生成疗法的主要靶点。尖端细胞是否需要差异信号来发展其复杂的分支模式仍然是未知的。在这里,我们表明,潜水尖端细胞侵入小鼠神经视网膜(D-尖细胞)是不同的尖端细胞引导视网膜血管丛(S-尖细胞)。D-tip细胞具有独特的转录特征,包括高TGF-β信号传导,并且它们开始获得血液-视网膜屏障特性。TGF-β受体I(Alk 5)的内皮缺失抑制D-末端细胞身份获得和深血管丛形成。内皮细胞ALK 5的缺失,而非典型SMAD效应子的缺失,导致异常收缩性周细胞分化和出血性血管畸形。氧诱导的视网膜病变血管显示S样尖端细胞,Alk 5缺失阻碍视网膜血管重建我们的数据揭示了阶段特异性尖端细胞异质性是视网膜血管发育的必要条件,并表明非经典TGF-β信号传导可以改善缺血性视网膜病变中的视网膜血管重建和神经功能。作为新生血管形成的起始者,内皮尖端细胞是血管生成治疗的主要靶点。Zarkada等人使用scRNA测序来鉴定促进神经视网膜血管化的TGF-β依赖性尖端细胞群,并且可以在治疗上靶向以促进视网膜病变中的血管再生。
Endothelial tip cells guiding tissue vascularization are primary targets for angiogenic therapies. Whether tip cells require differential signals to develop their complex branching patterns remained unknown. Here, we show that diving tip cells invading the mouse neuroretina (D-tip cells) are distinct from tip cells guiding the superficial retinal vascular plexus (S-tip cells). D-tip cells have a unique transcriptional signature, including high TGF-β signaling, and they begin to acquire blood-retina barrier properties. Endothelial deletion of TGF-β receptor I (Alk5) inhibits D-tip cell identity acquisition and deep vascular plexus formation. Loss of endothelial ALK5, but not of the canonical SMAD effectors, leads to aberrant contractile pericyte differentiation and hemorrhagic vascular malformations. Oxygen-induced retinopathy vasculature exhibits S-like tip cells, and Alk5 deletion impedes retina revascularization. Our data reveal stage-specific tip cell heterogeneity as a requirement for retinal vascular development and suggest that non-canonical-TGF-β signaling could improve retinal revascularization and neural function in ischemic retinopathy. As initiators of neovascularization, endothelial tip cells are primary targets for angiogenic therapies. Zarkada et al. use scRNA sequencing to identify a TGF-β-dependent tip cell population that promotes neuroretina vascularization and could be targeted therapeutically to promote revascularization in retinopathies.
DOI: 10.1038/ncomms8264
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影响因子: 16.6
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