相关实验视频
Updated: Aug 1, 2026
09:17
Labeling and Imaging Cells in the Zebrafish Hindbrain
Published on: July 25, 2010
11.3K
通过d-protocadherins在斑马鱼光学纹体中的电路组件的通道化
Sayantanee Biswas1, Michelle R Emond1, Grace S Philip1
1Department of Biological Chemistry and Pharmacology Ohio State University Wexner College of Medicine Columbus, OH 43210.
bioRxiv : the preprint server for biology
|February 20, 2025
概括
δ-protocadherin基因家族的成员,Protocadherin-19和Protocadherin-17,对于斑马鱼视觉回路的发育道化至关重要. 它们的缺失导致神经电路组合的可变干扰,影响大脑发育.
科学领域:
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
- 遗传学 遗传学 是一个
背景情况:
- 由于大脑的复杂性和神经发育障碍的异质性,了解基因在精确的神经网络组装中的作用具有挑战性.
- 瓦丁顿的道化概念描述了基因如何引导发展到一致的结果.
- δ-protocadherins是同型的粘附分子,与神经发育有关.
研究的目的:
- 调查Protocadherin-19和Protocadherin-17在斑马鱼视觉回路的发育道化中的作用.
- 量化这些基因对神经电路组装和可变性的影响.
主要方法:
- 使用的斑马鱼幼虫暴露于面向视觉刺激.
- 在视觉膜中进行了体内2光子成像,以分析人口活动动态.
- 在缺乏Protocadherin-19或Protocadherin-17的野生类型和突变幼虫中比较神经活动模式.
主要成果:
- 野生类型的斑马鱼幼虫在视觉电路活动中表现出非常相似的潜在动态,局限于一个保存的多元体.
- 与野生类型相比,Protocadherin-19和Protocadherin-17的突变体在潜在动态上显示出显著的分歧.
- 突变幼虫的偏差是随机的,这表明这些基因的损失会导致电路组织的变量中断.
结论:
- Protocadherin-19 和 Protocadherin-17 对于脊椎动物神经回路的发育道化至关重要.
- 这些基因的丧失导致了随机的表型变异性,为理解神经发育障碍异质性提供了一个模型.
- 为研究神经电路发育和变异性中的基因功能提供了定量框架.
相关概念视频
01:11Channel Rhodopsins
Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
01:21G-Protein Gated Ion Channels
GPCRs are primarily responsible for our sense of smell, taste, and vision. The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory organs,...
Sensory organs,...
01:25Structure of Cadherins
The cadherins were one of the first cell adhesion molecules discovered; the term “cadherins” is based on their calcium-dependent adhering properties. The first cadherins discovered on the epithelial, neuronal, and placental cells were named E-cadherin, P-cadherin, and N-cadherin, respectively. These classical cadherins share sequence and structural similarities. Other cadherins, including those involved in cell signaling, are grouped into non-classical cadherins. This diversity of cadherins...