相关实验视频
Updated: May 22, 2026
11:14
Modeling Paracrine Noncanonical Wnt Signaling In Vitro
Published on: December 10, 2021
ZNRF3以对R-脊柱素敏感的方式促进Wnt受体的周转
Huai-Xiang Hao1, Yang Xie, Yue Zhang
1Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.
Nature
|May 12, 2012
概括
通过抑制这种通路的负调节者ZNRF3,R-脊柱素增强了Wnt信号传递. 这一发现澄清了R-spondin的存在.
科学领域:
- 分子生物学分子生物学
- 细胞信号传输是如何进行的
- 生物化学 生物化学
背景情况:
- R-脊髓蛋白是关键的干细胞生长因子,可以增强Wnt信号传递.
- 目前尚不完全了解R-脊髓蛋白作用的精确分子机制.
- Wnt信号通路对发育和疾病至关重要,使其规范成为一个关键的研究领域.
研究的目的:
- 阐明R-脊髓蛋白增强Wnt信号的分子机制.
- 确定细胞表面E3泛素酶在Wnt通路调节中的作用.
- 探索ZNRF3作为调节Wnt信号的潜在治疗点.
主要方法:
- 研究了R-spondin,ZNRF3,RNF43和Wnt受体 (Frizzled,LRP6) 之间的相互作用.
- 利用基于细胞的测试和体内模型来评估ZNRF3抑制对Wnt信号的影响.
- 研究了R-脊髓蛋白对ZNRF3和Wnt受体的膜局部化和周转的影响.
主要成果:
- 通过促进Wnt受体周转,确定ZNRF3和RNF43作为Wnt信号的负反调节器.
- 通过抑制ZNRF3活动,证明R-spondin可以增强Wnt信号传递.
- 表明R-脊柱素与ZNRF3相互作用,导致ZNRF3从膜清除并增加Wnt受体水平.
结论:
- 通过抑制ZNRF3介导的受体降解,R-脊髓蛋白增强了Wnt信号传递.
- ZNRF3是Wnt受体周转率和Wnt信号振幅的关键调节器.
- 向ZNRF3为涉及Wnt通路失调的疾病提供了一个有希望的治疗策略.
相关概念视频
01:41Non-Canonical Wnt Signaling Pathways
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...
01:41Non-Canonical Wnt Signaling Pathways
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...
02:54Canonical Wnt Signaling Pathway
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 results in tumor...
02:54Canonical Wnt Signaling Pathway
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 results in tumor...
01:31Transducer Mechanism: Nuclear Receptors
Nuclear receptors, or NRs, are unique transcription factors that regulate gene transcription and affect the cellular pathways involved in reproduction, development, or metabolism. Their ability to be stimulated by small lipophilic ligands and control vital cellular processes makes them ideal drug targets. Nearly 10-15% of currently prescribed drugs target these receptors.
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
01:23Transcriptional Regulation: Riboswitches
Riboswitches are RNA elements that regulate gene expression by altering their secondary structures in response to specific effector molecules. These elements, located in the leader regions of certain mRNAs, act as transcriptional regulators by toggling between alternative conformations to control downstream gene expression. Riboswitch-mediated regulation is a precise mechanism for modulating biosynthetic pathways, as exemplified by the riboflavin biosynthesis pathway in Bacillus...