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Biophysical Assays to Probe the Mechanical Properties of the Interphase Cell Nucleus: Substrate Strain Application and Microneedle Manipulation
Published on: September 14, 2011
Retracción en la motilidad celular ameboide impulsada por la dinámica citoesquelética
Long Miao1, Orion Vanderlinde, Murray Stewart
1Department of Biological Science, Florida State University, Tallahassee, FL 32306, USA.
Science (New York, N.Y.)
|November 25, 2003
Resumen
El rastreo celular implica la protuberancia de los bordes y la retracción del cuerpo. Los investigadores reconstituyeron la retracción in vitro, revelando que la dinámica citoesquelética por sí sola impulsa ambos componentes de arrastre celular sin motores convencionales.
Área de la Ciencia:
- Biología celular Biología celular.
- La biofísica es la biofísica.
- La bioquímica es la bioquímica.
Sus antecedentes:
- El rastreo celular es esencial para los procesos biológicos.
- El rastreo celular implica la protuberancia de vanguardia y la retracción del cuerpo celular.
- Los mecanismos que impulsan la retracción de la célula no se comprenden completamente.
Objetivo del estudio:
- Para dilucidar los mecanismos moleculares subyacentes a la retracción celular.
- Para reconstituir la retracción celular in vitro.
- Para determinar el papel de la dinámica citoesquelética en la locomoción celular.
Principales métodos:
- Montó un importante aparato de motilidad basado en proteínas de esperma a partir de extractos de esperma de Ascaris.
- Retracción celular reconstituida in vitro mediante la introducción de Yersinia tirosina fosfatasa.
- Observaron y analizaron la dinámica citoesquelética durante la retracción.
Principales resultados:
- Retracción celular reconstituida con éxito in vitro.
- Se observó que la retracción in vitro refleja la retracción in vivo.
- Se demostró que el desmontaje y la reorganización del citoesqueleto son los principales impulsores de la retracción.
- Se demostró que la dinámica citoesquelética por sí sola puede generar tanto protuberancia como retracción.
Conclusiones:
- La dinámica citoesquelética, independiente de los motores convencionales, es suficiente para impulsar la retracción celular.
- Tanto la protuberancia como la retracción, componentes clave de la locomoción ameboide, se rigen por la dinámica citoesquelética.
- Este estudio proporciona un nuevo sistema in vitro para el estudio de la motilidad celular.
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