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Los dominios parecidos a los priones del programa del sarcoma de Ewing

James Shorter¹

¹Department of Biochemistry and Biophysics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA.

|September 23, 2017

Resumen

Los dominios parecidos a los priones impulsan las enfermedades neurodegenerativas. Boulay y otros. muestran que la proteína EWS-FLI1

Área de la Ciencia:

En el campo de la oncología
Biología molecular
La genética

Sus antecedentes:

Los dominios parecidos a los priones son cada vez más reconocidos por su papel en las enfermedades neurodegenerativas.
La proteína de fusión EWS-FLI1 es un factor oncogénico clave en el sarcoma de Ewing.

Objetivo del estudio:

Investigar el papel del dominio parecido a priones de EWS-FLI1 en la patogénesis del sarcoma de Ewing.
Comprender los mecanismos moleculares por los cuales EWS-FLI1 contribuye a la transcripción aberrante.

Principales métodos:

Investigó las propiedades biofísicas del dominio parecido al prión EWS-FLI1.
Se evaluó la capacidad de EWS-FLI1 para inducir la separación de fases.
Se examinó el reclutamiento de factores de remodelación de la cromatina por EWS-FLI1.
Analizó el impacto en los programas de transcripción en las células del sarcoma de Ewing.

Principales resultados:

El dominio de tipo priónico translocado de EWS-FLI1 facilita la separación de fase líquido-líquido.
La separación de fase por EWS-FLI1 conduce al reclutamiento inadecuado de factores de remodelación de la cromatina.
Este reclutamiento aberrante impulsa los programas de transcripción oncogénicos característicos del sarcoma de Ewing.

Conclusiones:

El dominio parecido al prión de EWS-FLI1 es un mediador crítico de la función oncogénica a través de la separación de fase.
Dirigirse a estos eventos de separación de fase podría ofrecer nuevas estrategias terapéuticas para el sarcoma de Ewing.

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