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CYLD suprime la replicación del virus de la enfermedad infecciosa de Bursal mediante la desbiquitinación de VP1
Qinghua Zeng1, Manzi Huang1, Boqian Zha1
1Department of Veterinary Preventive Medicine, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, PR China; Jiangxi Provincial Key Laboratory for Animal Health, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, PR China.
Veterinary microbiology
|August 27, 2025
Resumen
La deubiquitinasa de Cylindromatosis (CYLD) inhibe la replicación del virus de la enfermedad infecciosa de Bursal (IBDV) al dirigirse a la proteína viral VP1. La proteína viral VP3 interrumpe esta interacción, promoviendo la replicación del IBDV, destacando la CYLD como un objetivo terapéutico potencial.
Área de la Ciencia:
- Virología
- Biología molecular
- Inmunología
Sus antecedentes:
- La cilindromatosis (CYLD) es una deubiquitinasa (DUB) involucrada en la regulación de las vías de señalización y tiene funciones emergentes en la inmunidad antiviral.
- La función de CYLD en la infección por el virus de las enfermedades infecciosas de Bursal (IBDV) no se comprende bien.
Objetivo del estudio:
- Investigar el papel de la CYLD en la infección por IBDV y dilucidar los mecanismos moleculares subyacentes.
- Identificar objetivos terapéuticos potenciales para la infección por el IBDV.
Principales métodos:
- Coinmunoprecipitación y espectrometría de masas para identificar las proteínas que interactúan con CYLD.
- Estudios de sobreexpresión y nocaut/nocaut en células DF-1 para evaluar el efecto de CYLD en la replicación de IBDV.
- Análisis in vivo e in vitro de la expresión de CYLD durante la infección por IBDV.
- Mutagénesis dirigida al sitio para identificar residuos críticos en la actividad enzimática de CYLD.
Principales resultados:
- CYLD se une directamente a la proteína VP1 del IBDV.
- La sobreexpresión de CYLD inhibe la replicación de IBDV, mientras que la deficiencia de CYLD la aumenta, independientemente de la vía del interferón.
- La infección por IBDV aumenta la expresión de CYLD.
- CYLD deubiquitinates VP1, reduciendo su actividad polimerasa e inhibiendo la replicación viral.
- Un residuo catalítico específico (C602) en CYLD es crucial para su actividad enzimática e interacción con VP1.
- La proteína viral VP3 antagoniza la actividad antiviral de CYLD al interrumpir la interacción entre CYLD y VP1.
Conclusiones:
- CYLD juega un papel importante en la inmunidad antiviral contra el IBDV al dirigirse a la desubiquitinación y la actividad de VP1.
- El eje VP3-CYLD-VP1 es crítico para regular la replicación del IBDV.
- CYLD representa un objetivo terapéutico potencial para el control de las infecciones por IBDV.
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