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MEK protege la estabilidad del proteoma e inhibe la amiloidogénesis supresora del tumor a través de HSF1

Zijian Tang¹, Siyuan Dai², Yishu He²

¹The Jackson Laboratory, 600 Main Street, Bar Harbor, ME 04609, USA; Graduate Programs, Department of Molecular and Biomedical Sciences, The University of Maine, 5735 Hitchner Hall, Orono, ME 04469, USA.

|February 14, 2015

Resumen

La vía de las kinasas RAS/MAP.

Área de la Ciencia:

Biología celular Biología celular.
Oncología Oncología.
La proteostasis es la proteostasis.

Sus antecedentes:

La vía de la quinasa RAS/MAP es crucial en la señalización celular.
Anteriormente, el ERK se consideraba el único sustrato de MEK.
El papel de MEK en la regulación de la respuesta al estrés proteotóxico no estaba claro.

Objetivo del estudio:

Para identificar nuevos sustratos de MEK.
Para investigar el papel de la señalización MEK-HSF1 en el cáncer.
Para explorar estrategias terapéuticas dirigidas a la proteostasis tumoral.

Principales métodos:

Se ha investigado la interacción y regulación de MEK-HSF1.
Se analizaron los cambios proteómicos en las células tumorales tras el bloqueo MEK.
Evaluó el impacto de la amiloidogénesis en el crecimiento tumoral in vivo.

Principales resultados:

HSF1 identificado como un nuevo sustrato de MEK.
El bloqueo de MEK en las células tumorales causa caos proteómico y amiloidogénesis.
Las células tumorales exhiben una mayor susceptibilidad a la perturbación proteómica.
La amiloidogénesis demuestra efectos supresores de tumores, inhibiendo el crecimiento del melanoma.

Conclusiones:

La señalización oncogénica RAS-MEK mantiene la proteostasis y suprime la amiloidogénesis.
La inestabilidad proteómica es inherente al estado maligno.
Dirigirse a la proteostasis tumoral para inducir la amiloidogénesis es una estrategia potencial contra el cáncer.

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