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La actividad de la vía del hipopótamo influye en el destino de las células hepáticas
Dean Yimlamai1, Constantina Christodoulou2, Giorgio G Galli2
1The Stem Cell Program, Boston Children's Hospital, Boston, MA 02115, USA; Division of Gastroenterology and Nutrition, Department of Medicine, Boston Children's Hospital, Boston, MA 02115, USA.
Cell
|June 7, 2014
Resumen
La vía de señalización Hippo mantiene la identidad de las células hepáticas maduras. La inactivación hace que los hepatocitos adultos regresen a las células progenitoras, revelando plasticidad e implicaciones para la regeneración hepática.
Área de la Ciencia:
- Biología celular Biología celular.
- Biología del desarrollo Biología del desarrollo.
- Hepatología Hepatología.
Sus antecedentes:
- La vía de señalización Hippo regula el tamaño de los órganos y la proliferación celular.
- Su papel en el control de las decisiones del destino celular, particularmente en los hepatocitos, sigue siendo en gran medida inexplorado.
Objetivo del estudio:
- Investigar la función de la vía de señalización Hippo en el mantenimiento de la diferenciación hepatocítica y el destino celular.
- Explorar el potencial de los hepatocitos maduros para volver a los estados progenitor.
Principales métodos:
- El rastreo del linaje traza el linaje.
- El análisis clonal.
- El cultivo de organoides in vivo es un cultivo de organoides.
- La inactivación aguda de la vía de señalización de Hippo.
Principales resultados:
- La actividad de la vía de Hippo es crucial para mantener el estado diferenciado de los hepatocitos adultos.
- La inactivación aguda de la vía de Hippo in vivo induce eficientemente la desdiferenciación de los hepatocitos en células progenitoras.
- Estas células progenitoras inducidas exhiben capacidades de autorrenovación y de injerto de una sola célula.
- La vía de señalización NOTCH fue identificada como un efector clave aguas abajo de YAP, un transductor de la vía de Hippo.
Conclusiones:
- La señalización Hippo/YAP juega un papel crítico en el gobierno del destino de las células hepáticas.
- Los hepatocitos maduros poseen una plasticidad fenotípica significativa, capaz de desdiferenciarse en células progenitoras.
- Estos hallazgos ofrecen nuevos conocimientos sobre los mecanismos de regeneración hepática y posibles estrategias terapéuticas.
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