Sulfated glycans engage the Ang-Tie pathway to regulate vascular development.

Sulfated glycans engage the Ang-Tie pathway to regulate vascular development.
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硫酸化聚糖参与血管生成素-酪氨酸激酶受体(Ang - Tie)通路以调节血管发育。

DOI:
10.1038/s41589-020-00657-7
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发表时间:
2021-03
影响因子:
14.8
通讯作者:
Hsieh-Wilson LC
Hsieh-Wilson LC
中科院分区:
生物学1区
文献类型:
--
作者:
Griffin ME;Sorum AW;Miller GM;Goddard WA 3rd;Hsieh-Wilson LC

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血管生成素(Ang)/Tie通路对于血管系统的正常成熟和重塑至关重要。尽管它在疾病中很重要,但控制该通路信号转导的机制却知之甚少。在此,我们证明硫酸乙酰肝素糖胺聚糖(HS GAGs)通过与Ang配体和Tie1受体的直接相互作用来调节Ang/Tie信号传导。HS GAGs与Ang1/4配体结合并形成三元Ang - Tie2受体复合物,从而增强内皮细胞的存活信号。此外,我们发现HS GAGs是孤儿受体Tie1的新型配体。HS - Tie1相互作用促进了Tie1 - Tie2异二聚化,并增强了成熟血管系统中Tie1的稳定性。在体内使用CRISPR/Cas9介导的诱变破坏HS - Tie1结合,导致Tie蛋白水平降低、通路抑制和视网膜血管异常。总之,这些结果表明硫酸化聚糖利用双重机制调节Ang/Tie信号传导,并且对血管系统的发育和维持非常重要。
The angiopoietin (Ang)/Tie pathway is essential for the proper maturation and remodeling of the vasculature. Despite its importance in disease, the mechanisms that control signal transduction through this pathway are poorly understood. Here, we demonstrate that heparan sulfate glycosaminoglycans (HS GAGs) regulate Ang/Tie signaling through direct interactions with both Ang ligands and the Tie1 receptor. HS GAGs bound to Ang1/4 ligands and formed ternary Ang-Tie2 receptor complexes, thereby potentiating endothelial survival signaling. In addition, we found that HS GAGs are novel ligands for the orphan receptor Tie1. The HS-Tie1 interaction promoted Tie1-Tie2 heterodimerization and enhanced Tie1 stability within the mature vasculature. Loss of HS-Tie1 binding using CRISPR/Cas9-mediated mutagenesis in vivo led to decreased Tie protein levels, pathway suppression, and aberrant retinal vascularization. Together, these results reveal that sulfated glycans use dual mechanisms to regulate Ang/Tie signaling and are important for the development and maintenance of the vasculature.
DOI: 10.1172/jci68897
发表时间: 2014-02-01
影响因子: 15.9
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分子机制和血管生成的临床应用。
DOI: 10.1038/nature10144
发表时间: 2011-05-19
期刊: NATURE
影响因子: 64.8
作者:
Carmeliet, Peter;Jain, Rakesh K.
通讯作者: Jain, Rakesh K.
DOI: 10.1038/nrd2792
发表时间: 2009-03
期刊: Nature reviews. Drug discovery
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