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Updated: Sep 9, 2025

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Monitoring Hippo Signaling Pathway Activity Using a Luciferase-based Large Tumor Suppressor LATS Biosensor
Published on: September 13, 2018
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Caenorhabditis elegans utiliza las señales canónicas y no canónicas de Hippo
bioRxiv : the preprint server for biology
|September 5, 2025
Resumen
La vía de señalización del hipopótamo regula el crecimiento del tejido. En C. elegans, este camino
Área de la Ciencia:
- Biología celular
- Biología del desarrollo
- Vías de señalización
Sus antecedentes:
- La vía de señalización del hipopótamo es un regulador crucial de la homeostasis tisular y el control del tamaño de los órganos en los metazoos.
- Si bien los componentes centrales de la vía Hippo (MST, LATS, YAP / TAZ, TEAD) se conservan, sus funciones precisas en organismos con desarrollo invariante, como C. elegans, no se comprenden completamente.
- Estudios anteriores sugieren que un módulo conservado (WTS-1, YAP-1, EGL-44) es necesario para el desarrollo larval de C. elegans, pero un papel directo para la señalización de Hippo sigue sin establecerse.
Objetivo del estudio:
- Para investigar el papel directo de la vía de señalización de Hippo en el desarrollo de Caenorhabditis elegans.
- Aclarar las funciones específicas y la regulación de YAP-1, un efector clave en diferentes tejidos de C. elegans.
- Identificar las quinasas aguas arriba y sus funciones en la modulación de la actividad de la vía de Hippo durante el desarrollo larval.
Principales métodos:
- Generó un YAP-1 endógeno marcado con fluorescencia para servir como biomarcador vivo para la actividad de la vía.
- Se utilizaron estrategias de agotamiento específicas del tejido para evaluar la función de WTS-1 en varios tejidos.
- Investigó las funciones de las quinasas relacionadas con Hippo (CST-1, CST-2, MIG-15, GCK-2) en la regulación de la localización YAP-1 y la progresión larval.
Principales resultados:
- La pérdida de WTS-1 indujo la translocación nuclear YAP-1 tanto en el epitelio como en el intestino, pero solo el WTS-1 intestinal era esencial para el desarrollo larval más allá de L2.
- Las quinasas CST-1 y CST-2 reprimieron la localización nuclear de YAP-1 en el epitelio, pero no en el intestino, destacando la regulación específica del tejido.
- MIG-15 mostró redundancia con CST-1/2 para la progresión larval y afectó la abundancia de YAP-1, mientras que GCK-2 no tuvo un papel discernible.
Conclusiones:
- Estableció C. elegans como modelo para estudiar la señalización de Hippo, revelando una cascada canónica en el epitelio y entradas no canónicas en el intestino.
- Se ha demostrado que los productos de YAP-1/EGL-44 pasan del control del crecimiento a las funciones de desarrollo no proliferativas en C. elegans.
- Descubrió mecanismos reguladores distintos de la vía del hipopótamo en diferentes tejidos, con implicaciones para la comprensión de la plasticidad del desarrollo.
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