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Cambiar la potencia por fusión espontánea.

Qi-Long Ying1, Jennifer Nichols, Edward P Evans

  • 1Centre for Genome Research, University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3JQ, UK.

Nature
|April 5, 2002
PubMed
Resumen
Este resumen es generado por máquina.

Las células madre de mamíferos pueden no cambiar intrínsecamente los tipos de tejido. En cambio, la fusión entre las células progenitoras del sistema nervioso central y las células madre embrionarias crea células híbridas con potencial pluripotente.

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Área de la Ciencia:

  • Biología de las células madre Biología de las células madre
  • Biología del desarrollo Biología del desarrollo.
  • La reprogramación celular es la reprogramación celular.

Sus antecedentes:

  • Informes recientes sugieren que las células madre de mamíferos pueden diferenciarse en tipos celulares de otros tejidos.
  • La plasticidad intrínseca de las células madre del tejido es un fenómeno ampliamente discutido.

Objetivo del estudio:

  • Definir un mecanismo por el cual las células progenitoras del sistema nervioso central pueden generar derivados no neuronales.
  • Investigar el potencial de la reprogramación epigenética y la fusión celular en la plasticidad de las células madre.

Principales métodos:

  • Co-cultivo de células progenitoras del cerebro de ratón con células madre embrionarias pluripotentes.
  • Utilizando un marcador transgénico para la selección de células cerebrales.
  • Analizando las características genómicas y fenotípicas de las células recuperadas.

Principales resultados:

  • Se recuperaron células madre no diferenciadas que llevaban material genético tanto de células cerebrales como de células madre embrionarias.
  • Se produjo una reprogramación epigenética del genoma de la célula cerebral.
  • Las células recuperadas fueron identificadas como células híbridas tetraploides con carácter pluripotente completo.
  • Estas células híbridas contribuyeron a múltiples linajes en las quimeras.

Conclusiones:

  • La plasticidad observada no se debe a la conversión directa sino a la generación espontánea de células híbridas a través de la fusión.
  • La transdeterminación, resultante de la fusión celular, puede explicar muchas observaciones atribuidas a la plasticidad intrínseca de las células madre.
  • Este hallazgo redefine la comprensión del comportamiento de las células madre y el potencial de diferenciación.