相关实验视频
Updated: May 12, 2026
04:27
Live-cell Imaging of Sensory Organ Precursor Cells in Intact Drosophila Pupae
Published on: May 27, 2011
概括
诺奇基因的突变导致胚细胞成为神经细胞而不是皮肤. 划分基因功能是自主性的,这意味着它在细胞内局部起作用,在发育过程中控制细胞命运.
科学领域:
- 发展生物学 发展生物学
- 遗传学 遗传学 是一个
- 神经科学是一个神经科学.
背景情况:
- 诺奇基因在胚胎发育过程中对细胞命运的决定起着至关重要的作用.
- 在Drosophila胚胎中的Notch位点的突变导致表皮前体转化为神经母细胞.
- 了解Notch基因功能的精确细胞要求对于破译发育途径至关重要.
研究的目的:
- 研究Drosophila神经生成中野生类型Notch基因功能的细胞需求.
- 确定诺奇在皮下细胞分化中的自主或非自主作用.
- 为了阐明Notch蛋白在神经发生过程中的局部功能.
主要方法:
- 在Drosophila胚胎中利用遗传马赛克来分析Notch基因功能.
- 采用皮质标记物来区分马赛克胚胎中的下皮细胞基因型.
- 检查了野生类型和突变克隆的分布,以评估细胞命运决定.
主要成果:
- 神经原生区域内的基因型Notch细胞未能分化为下皮.
- 马赛克边界揭示了自主诺奇功能,诺奇阳性下皮与神经缩相邻.
- 与对照组的比较表明,野生类型的皮下细胞岛未能在Notch马赛克中区分皮质.
结论:
- 缺口基因功能在皮下细胞中是自主性的,在局部作用,调节细胞命运.
- 诺奇蛋白对表皮发育至关重要,并防止神经原生区域的神经命运发生.
- 这些发现凸显了Notch信号在保持Drosophila神经发生过程中的细胞身份的重要性.
相关概念视频
01:51Determination
During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...
03:14Notch 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...
02:33Hedgehog Signaling Pathway
The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...
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...
03:14Notch 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...
01:12Role Of Notch Signalling In Intestinal Stem Cell Renewal
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...