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The Soft Agar Colony Formation Assay
Published on: October 27, 2014
一种与LDL受体相关的蛋白质在小鼠中介 Wnt 信号传递
K I Pinson1, J Brennan, S Monkley
1Department of Molecular and Cell Biology, University of California, Berkeley 94720, USA.
Nature
|October 12, 2000
概括
低密度脂蛋白受体相关蛋白6 (LRP6) 对于哺乳动物的Wnt信号传递至关重要. 它的突变导致发育缺陷,突出LRP6.
科学领域:
- 发展生物学 发展生物学
- 分子遗传学 分子遗传学
- 细胞信号传递 细胞信号传递
背景情况:
- Wnt蛋白质是胚胎发育的关键分泌因素,调节身体轴模式,中枢神经系统和四肢发育以及器官生成.
- 虽然Wnt信号传输途径的部分理解,但Wnt蛋白及其Frizzled受体向下游效应器传输信号的机制仍然不清楚.
研究的目的:
- 研究一种新型低密度脂蛋白 (LDL) 受体相关蛋白家族成员LRP6在哺乳动物发育过程中的Wnt信号传递中的作用.
主要方法:
- 对具有LRP6基因插入突变的小鼠胚胎进行分析.
- 对LRP6缺陷胚胎发育缺陷的检查.
- 在具有不同LRP6基因拷贝数量的小鼠中对Wnt突变表型的遗传分析.
主要成果:
- 同卵性LRP6缺陷的小鼠胚胎表现出发育异常,反映了Wnt基因个体突变中的缺陷.
- 降低LRP6基因剂量将遗传增强现有的Wnt突变的表型.
结论:
- 在哺乳动物中,LRP6在转导来自多个Wnt配体的信号方面发挥着至关重要的作用.
- 对于正常的胚胎发育来说,LRP6是必不可少的,它是Wnt信号传导中的关键组成部分.
相关概念视频
Notch Signaling Pathway
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 until 1985...
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 until 1985...
Canonical 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...
Non-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...
Notch Signaling Pathway
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 until 1985...
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 until 1985...
Canonical 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...
Non-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...

