相关实验视频
Updated: May 3, 2026

08:22
Assessment and Characterization of Hyaloid Vessels in Mice
Published on: May 15, 2019
8.8K
在视网膜血管发育和血脑屏障可塑性中的诺林/Frizzled4信号传递
Yanshu Wang1, Amir Rattner, Yulian Zhou
1Department of Molecular Biology and Genetics, Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
Cell
|December 11, 2012
概括
诺林/Frizzled4 (Fz4) 信号传递对于视网膜血管发育至关重要. 内皮细胞中缺陷的Fz4信号导致血管缺陷和消除,突出显示了质量控制机制和持续的屏障功能作用.
科学领域:
- 发展生物学 发展生物学
- 血管生物学 血管生物学
- 神经科学是一个神经科学.
背景情况:
- 诺林/Frizzled4 (Fz4) 信号激活Wnt通路,在视网膜血管发育中发挥关键作用.
- 在内皮细胞和成熟的血管结构中,诺林/Fz4信号传递的精确功能仍在研究中.
研究的目的:
- 研究诺林/Fz4信号在视网膜血管发育和维护中的作用.
- 探索Fz4信号在内皮细胞中的细胞自主和非自主效应.
- 确定诺林/Fz4信号对血视网膜和血脑屏障功能的影响.
主要方法:
- 利用基因工程小鼠模型研究诺林/Fz4信号.
- 创建了基因马赛克来分析内皮细胞 (EC) 相互作用和行为.
- 评估视网膜血管架构和血脑/视网膜屏障完整性.
主要成果:
- 早期的诺林生产导致了过早的视网膜血管入侵;延迟的生产导致了建筑缺陷.
- 野生类型的EC指示邻近的Fz4(-/-) EC形成正常的血管系统 (非自主效应).
- 从马赛克血管系统中选择性地消除了Fz4(-/-) EC,这表明了质量控制机制.
- 成年小鼠的改变诺林/Fz4信号影响了血视网膜和血脑屏障功能,显示出可塑性.
结论:
- 诺林/Fz4信号传递对于正常的视网膜血管发育和内皮细胞存活至关重要.
- 血管质量控制系统可以消除缺陷的Fz4缺陷内皮细胞.
- 的信号传递对于维持血视网膜和血脑屏障至关重要,并且在成熟的中枢神经系统血管中表现出可塑性.
相关概念视频
Notch Signaling Pathway
4.6K
The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not...
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not...
4.6K
Canonical Wnt Signaling Pathway
8.6K
The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which...
8.6K
Non-Canonical Wnt Signaling Pathways
6.4K
Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...
6.4K
Regulation of Angiogenesis and Blood Supply
2.9K
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
2.9K
Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal
1.8K
Erythropoietin-producing hepatocellular carcinoma receptor (Eph) and its ligand, Eph receptor-interacting protein (Ephrin) were first discovered in the human carcinoma cell line, hence the name. Ephrin-Eph interaction guides cells to reach their appropriate location in adult tissues. They also play an essential role in the immune system by helping in immune cell migration, adhesion, and activation. Based on their structure and function, Eph is divided into two classes — EphA and EphB.
1.8K
Role Of Notch Signalling In Intestinal Stem Cell Renewal
1.8K
Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
1.8K

