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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

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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...
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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.
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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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Video Experimental Relacionado

Updated: May 7, 2026

Real-Time In Vitro Migration Assay for Primary Murine CD8+ T Cells
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Published on: May 24, 2024

Migración direccional del tejido a través de un gradiente de quimioquina autogenerado.

Erika Donà1, Joseph D Barry, Guillaume Valentin

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

Nature
|September 27, 2013
PubMed
Resumen
Este resumen es generado por máquina.

Los colectivos celulares migratorios pueden crear sus propias señales de guía locales, moviéndose independientemente de las señales externas. Este mecanismo de gradiente de quimiocinas autogenerado dirige la migración de los tejidos in vivo.

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Área de la Ciencia:

  • Biología del desarrollo Biología del desarrollo.
  • Biología celular Biología celular.
  • Biología Molecular Biología Molecular

Sus antecedentes:

  • La embriogénesis se basa en la migración celular dirigida, por lo general a lo largo de gradientes de quimioatractores externos.
  • La autogeneración de gradientes locales de desplazamiento ofrece una estrategia de migración alternativa, permitiendo una direccionalidad autodeterminada.
  • La visualización in vivo de señales de guía endógenas ha sido una limitación importante en el estudio de gradientes autogenerados.

Objetivo del estudio:

  • Para definir la dinámica in vivo de la quimioquina Cxcl12a utilizando un enfoque de temporizador fluorescente.
  • Para demostrar que los colectivos de células migratorias pueden auto-generar gradientes de quimioquinas in vivo.
  • Proporcionar pruebas in vivo de la migración autodirigida de los tejidos a través de la conformación de señales extracelulares locales.

Principales métodos:

  • Utilizó un enfoque de temporizador fluorescente para medir la rotación de receptores desencadenados por ligandos en peces cebra vivos.
  • Aplicó este método al sistema de modelo de la línea lateral primordial del pez cebra.
  • Diseñó una fuente externa del receptor atípico Cxcr7 para probar la suficiencia de los gradientes autogenerados.

Principales resultados:

  • Dinámica cuantificada in vivo de la molécula guía Cxcl12a.
  • Se demostró que los colectivos de células migratorias auto-generan gradientes de actividad de quimioquinas a través de la internalización mediada por receptores polarizados.
  • Se demostró que un mecanismo de gradiente autogenerado es suficiente para dirigir una robusta migración de células colectivas.

Conclusiones:

  • Este estudio proporciona la primera evidencia in vivo de la migración de tejidos autodirigida impulsada por la configuración local de señales extracelulares.
  • Los hallazgos revelan un nuevo mecanismo para la migración celular colectiva independiente de los gradientes de largo alcance.
  • Establece un marco para investigar la migración autodirigida en los procesos de desarrollo y enfermedades como la invasión del cáncer.