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La autofagia regula la muerte celular programada durante la respuesta inmune innata de la planta
Yule Liu1, Michael Schiff1, Kirk Czymmek2
1Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, Connecticut 06520.
Cell
|May 24, 2005
Resumen
La planta BECLIN 1 restringe la muerte celular programada (PCD) durante la respuesta de hipersensibilidad (HR) a los sitios de infección. Este componente esencial de la vía de la autofagia previene la muerte celular generalizada, manteniendo la inmunidad de la planta.
Área de la Ciencia:
- Biología vegetal Biología vegetal
- Biología molecular La biología molecular.
- Inmunología Inmunología.
Sus antecedentes:
- La respuesta inmune innata de la planta implica la respuesta de hipersensibilidad (HR), un tipo de muerte celular programada (PCD).
- Una RH efectiva requiere que la DPC se limite a los sitios de infección para evitar consecuencias patológicas.
- Los mecanismos precisos que regulan la localización de HR PCD no se comprenden completamente.
Objetivo del estudio:
- Investigar el papel de la planta BECLIN 1, un gen relacionado con la autofagia, en la regulación de la DPC de la HR.
- Para determinar si BECLIN 1 funciona para restringir la PCD a los sitios de infección.
- Para aclarar la participación de la vía de la autofagia en la inmunidad innata de las plantas.
Principales métodos:
- Análisis de mutantes vegetales con deficiencia de BECLIN 1.
- Caracterización fenotípica de la DPC de HR en tejidos inoculados y distales.
- Evaluación de la inducción de la autofagia durante la HR.
- Investigando el requisito de otros genes relacionados con la autofagia (PI3K / VPS34, ATG3, ATG7) en la restricción de HR PCD.
Principales resultados:
- Las plantas con deficiencia de BECLIN 1 inician la HR PCD normalmente, pero exhiben muerte celular incontrolada en los tejidos adyacentes y distales.
- La autofagia se induce tanto en células infectadas como no infectadas durante la HR, con una inducción reducida en plantas con deficiencia de BECLIN 1.
- La restricción de HR PCD depende de los ortólogos de PI3K / VPS34, ATG3 y ATG7, lo que indica un papel para la vía de la autofagia.
Conclusiones:
- La planta BECLIN 1 es crucial para restringir el PCD de HR a los sitios de infección.
- La vía de autofagia evolucionariamente conservada juega un papel vital en la inmunidad innata de las plantas.
- La autofagia regula negativamente la PCD, previniendo la muerte celular excesiva durante las respuestas inmunes de las plantas.
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