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相关概念视频

Chemotaxis and Direction of Cell Migration01:21

Chemotaxis and Direction of Cell Migration

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 towards...
Cell Migration01:09

Cell Migration

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.
Cell Migration01:19

Cell Migration

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.
Cytoskeletal Coordination in Cell Migration01:32

Cytoskeletal Coordination in Cell Migration

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 proteins that...
Role of Myosin in Cell Migration01:18

Role of Myosin in Cell Migration

Myosins are multimeric motor proteins involved in various cellular processes such as migration, adhesion, and proliferation. Myosin II is the most common type in animal cells, which binds and cross-links actin filaments.
Myosin II  is a hexamer comprising two heavy chains with globular heads and coiled-coil tails, two regulatory light chains, and two essential light chains. The ATPase sites on the myosin heads hydrolyze ATP, and the released phosphate generates the force for contraction. It is...
Cell Polarization by Rho Proteins01:21

Cell Polarization by Rho Proteins

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,...

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相关实验视频

Updated: May 7, 2026

Real-Time In Vitro Migration Assay for Primary Murine CD8+ T Cells
06:42

Real-Time In Vitro Migration Assay for Primary Murine CD8+ T Cells

Published on: May 24, 2024

通过自我生成的化学激素梯度的定向组织迁移.

Erika Donà1, Joseph D Barry, Guillaume Valentin

  • 1EMBL Heidelberg, Meyerhofstraße 1, 69117 Heidelberg, Germany.

Nature
|September 27, 2013
PubMed
概括
此摘要是机器生成的。

迁移的细胞集体可以创建自己的本地指导线索,独立于外部信号移动. 这种自我生成的化学基因梯度机制在体内指导组织迁移.

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Last Updated: May 7, 2026

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06:42

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Published on: May 24, 2024

Planar Gradient Diffusion System to Investigate Chemotaxis in a 3D Collagen Matrix
09:26

Planar Gradient Diffusion System to Investigate Chemotaxis in a 3D Collagen Matrix

Published on: June 12, 2015

Traction Microscopy Integrated with Microfluidics for Chemotactic Collective Migration
10:53

Traction Microscopy Integrated with Microfluidics for Chemotactic Collective Migration

Published on: October 13, 2019

科学领域:

  • 发育生物学 发展生物学
  • 细胞生物学 细胞生物学
  • 分子生物学分子生物学

背景情况:

  • 胚胎发生依赖于有针对性的细胞迁移,通常沿着外部化学吸引剂梯度.
  • 本地,移动梯度的自我生成提供了一个替代的迁移策略,使自主决定的方向性.
  • 内生引导线索的体内可视化一直是研究自我生成梯度的一个主要局限性.

研究的目的:

  • 通过光定时方法来定义化基因Cxcl12a的体内动态.
  • 为了证明迁移的细胞集体可以在体内自我生成化学激素梯度.
  • 通过局部细胞外线线索成形提供体内证据,证明通过局部细胞外线索成形进行自我引导的组织迁移.

主要方法:

  • 利用光计时器方法来测量活斑马鱼中带触发受体周转率.
  • 将这种方法应用于斑马鱼侧线原始模型系统.
  • 设计了一种异常受体Cxcr7的外部源,以测试自我生成梯度的充分性.

主要成果:

  • 指导分子Cxcl12a的量化体内动态.
  • 表明迁移的细胞集体通过极化受体介导的内部化自我生成化学激素活性梯度.
  • 证明自生成的梯度机制足以指导强大的集体细胞迁移.

结论:

  • 这项研究提供了第一个体内证据,证明由细胞外线的局部塑造驱动的自我导向的组织迁移.
  • 这些发现揭示了一种新的集体细胞迁移机制,独立于远程梯度.
  • 建立了一个研究发展过程中的自我导向迁移和癌症入侵等疾病的研究框架.