与肝素硫酸盐复合的GLYCORNA调节了VEGF-A信号传递
Peiyuan Chai1, Sina Kheiri2,3, Andrew Kuo4
1Stem Cell and Regenerative Biology Program, Division of Hematology/Oncology, Department of Pediatrics, Boston Children's Hospital, Boston, MA, USA.
Nature
|January 28, 2026
概括
细胞表面核糖蛋白 (csRNPs) 通过与VEGF-A结合来对抗硫酸介导的信号传递,影响血管发育. 这一发现揭示了血管生成中的新调节轴.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 肝酸硫酸蛋白质甘 (HSPGs) 是像VEGF-A这样的生长因子的关键共受体,调解细胞信号传递.
- 通过HSPG调节细胞表面信号的精确机制,特别是细胞表面RNA,尚不清楚.
- VEGF-A信号传递对内皮细胞生长和血管生成至关重要,其调节通常归因于肝硫酸盐链硫化.
研究的目的:
- 研究细胞表面结合物的组织规则,特别是糖核糖核糖核酸和细胞表面RNA结合蛋白 (csRBPs).
- 阐明HSPG和细胞表面核糖蛋白 (csRNP) 在调节VEGF-A信号传递中的机制性作用.
- 发现影响血管生成的新型调节途径.
主要方法:
- 基因组规模的淘汰屏幕用于识别对csRNP组装至关重要的基因.
- 生物化学测试以确定VEGF-A,RNA和肝素硫酸盐之间的相互作用.
- 在体外和体内研究使用模型系统来评估对血管发育的影响.
主要成果:
- 肝素硫酸盐的生物合成,特别是6-O-硫化,对于糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核糖核核核核核核核核核核核核核核核
- 这些csRNP集群对抗VEGF-A下游的ERK信号激活.
- VEGF-A结合域负责RNA相互作用;破坏这种相互作用会增强ERK信号传递,并损害血管发育.
结论:
- 细胞表面核糖蛋白 (csRNPs) 是一种新型的阳离子细胞表面结合物.
- csRNP负面调节硫酸介导的信号通路,特别影响VEGF-A驱动的血管生成.
- 这种VEGF-A,RNA和肝酸硫酸之间的相互作用在血管发育中呈现出以前未知的调节轴.
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