特定的神经细胞衍生信号控制细胞迁移和宿命在面向迁移流中的命运
Wei Zhou1, James R Munoz2, Hsin-Yi Henry Ho3
1Department of Neuroscience and the Jefferson Synaptic Biology Center, Thomas Jefferson University, 900 Walnut Street, Philadelphia, PA 19107, USA.
bioRxiv : the preprint server for biology
|March 3, 2025
概括
EphB2 是一种新发现的神经母细胞衍生线索,对于引导迁移的神经母细胞通过面向迁移流 (RMS) 到嗅球 (OB) 至关重要,从而影响它们的命运和分化.
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
- 细胞生物学 细胞生物学
背景情况:
- 神经细胞迁移和分化对于形成功能性神经元电路至关重要.
- 神经芽细胞通过面向迁移流 (RMS) 迁移到嗅球 (OB) 的引导机制在很大程度上仍未被描述.
- 了解这些迁移线索对于理解大脑发育和潜在的治疗干预至关重要.
研究的目的:
- 识别和描述涉及RMS沿线迁移的新型神经细胞衍生线索.
- 阐明EphB2在神经细胞迁移和发育大脑中的细胞命运决定中的作用.
- 研究神经发生过程中EphB2活动和表达的调节.
主要方法:
- 免疫组织化学分析RMS和OB中的EphB2表达模式.
- 激酶活性测定用于评估迁移神经细胞中的EphB活性.
- 基因操纵 (敲除和阻断) 来研究EphB2损失或抑制的功能后果.
- 对神经细胞迁移和分化标记物的分析.
主要成果:
- 在RMS中迁移的神经细胞中,EphB2具有选择性表达和激酶活性.
- 对于沿着RMS的正常神经细胞迁移,EphB2是必需的.
- 对EphB激酶活性和EphB2表达的下调与OB中的神经细胞分化有关.
- 抑制EphB激酶活性或阻断EphB2导致迁移缺陷和过早分化.
- 过早失去EphB2会导致神经母细胞停止迁移,并采用类似于星球细胞的细胞命运.
结论:
- 在RMS中,EphB2充当关键的神经细胞衍生线索,调节RMS内的迁移.
- EphB2激酶的活性和表达与神经细胞迁移和细胞命运规范密切相关.
- 这些发现揭示了一种控制神经细胞导航和分化在嗅球发育过程中的新机制.
相关概念视频
01:09Cell Migration
16.6K
Cell migration, the process by which cells move from one location to another, is essential for the proper development and viability of organisms throughout their life. When cells are not able to migrate properly to their ordained locations, various disorders may occur. For example, disruption in cell migration causes chronic inflammatory diseases such as arthritis.
16.6K
01:51Determination
16.4K
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...
16.4K
01:19Cell Migration
6.1K
Cell migration is a process by which the cells move from one location to another, playing an essential role in embryological development, repair and regeneration, immune response, and metastasis. Cells migrate in response to chemical or mechanical signals generated by specific organs or tissues. The overall mechanism includes three steps - polarization, protrusion, and release. Polarization involves the formation of a distinct cell front and rear, which determines the direction of movement.
6.1K
01:21Cell Polarization by Rho Proteins
3.2K
Cell polarity is the asymmetric distribution of cellular and membrane components, making one side of the cell different from the other. This polarity is essential to many processes such as embryogenesis, axon migration, glucose transport across epithelial cells, and directional cell migration. A migrating cell responds to intracellular or extracellular signals via molecular cascades that reorganize the actin cytoskeleton to establish this polarity. In these cells, the Rho family proteins Cdc42,...
3.2K
01:21Chemotaxis and Direction of Cell Migration
5.0K
Cells can detect chemical cues in their environment and reorganize the cytoskeleton to migrate toward them or away from them. This directional migration, called chemotaxis, is essential during embryogenesis and development, immune response, tissue repair and regeneration, and reproduction. These chemical cues can either attract or repel the cell's movement. For example, axon development is determined by a combination of chemoattractants and chemorepellents that direct the growing axon...
5.0K
01:32Cytoskeletal Coordination in Cell Migration
4.9K
A migrating cell changes its shape during the cyclic events of attachment and detachment from the substratum and repositions the cell organelles correspondingly. These complex events are orchestrated by the dynamic cytoskeletal network comprising actin filaments, intermediate filaments, and microtubules. Cytoskeletal crosstalk — the direct and indirect communication between the different components — is crucial for this coordination. Direct communication involves various linker...
4.9K