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Una jerarquía celular en el melanoma separa el crecimiento y la metástasis
Panagiotis Karras1,2, Ignacio Bordeu3,4,5, Joanna Pozniak1,2
1Laboratory for Molecular Cancer Biology, Center for Cancer Biology, VIB, Leuven, Belgium.
Nature
|September 21, 2022
Resumen
La diversidad celular del melanoma alimenta el crecimiento del tumor y la metástasis a través de subpoblaciones distintas. Estas células adquieren estados específicos en nichos perivasculares, y algunas inician metástasis en lugar de crecimiento tumoral primario.
Área de la Ciencia:
- En el campo de la oncología
- Biología del cáncer
- Dinámica Celular
Sus antecedentes:
- El melanoma exhibe una heterogeneidad y plasticidad significativas, pero los orígenes y el alcance de la diversidad de estados celulares son poco conocidos.
- Todavía no está claro si las subpoblaciones de melanoma distintas o superpuestas impulsan el crecimiento del tumor y la metástasis.
Objetivo del estudio:
- Investigar el origen y la magnitud de la diversidad de estado celular del melanoma.
- Para determinar si las subpoblaciones celulares distintas apoyan el crecimiento tumoral y la diseminación metastásica.
Principales métodos:
- Genética del ratón
- Transcriptómica de una sola célula y espacial
- El rastreo del linaje
- Modelado cuantitativo
Principales resultados:
- Se identificó un modelo jerárquico de crecimiento tumoral que refleja el desarrollo de la cresta neural embrionaria.
- La competencia tumorigénica está vinculada a un nicho perivascular adquirido a través de la comunicación celular endotelial.
- Las células de melanoma mesenquimal, trazadas con el tiempo, no contribuyeron al crecimiento del tumor primario, sino que iniciaron la metástasis, cambiando la identidad celular en los órganos secundarios.
Conclusiones:
- Los estados y trayectorias de las células de melanoma se mapearon espacial y temporalmente.
- Distintos grupos celulares parecen responsables de apoyar el crecimiento tumoral frente a la metástasis.
- Las estrategias terapéuticas dirigidas a la reprogramación de las células cancerosas por señales microambientales están justificadas.
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