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Edición CRISPR predecible y precisa de las variantes patógenas
Max W Shen1,2, Mandana Arbab3,4,5, Jonathan Y Hsu6,7
1Computational and Systems Biology Program, Massachusetts Institute of Technology, Cambridge, MA, USA.
Nature
|November 9, 2018
Resumen
La edición del genoma Cas9 sin plantilla ahora es predecible para la reparación precisa del ADN. Este enfoque de aprendizaje automático corrige las mutaciones asociadas a la enfermedad, ofreciendo una nueva herramienta para aplicaciones de terapia génica.
Área de la Ciencia:
- La genómica
- Biología molecular
- La bioinformática
Sus antecedentes:
- La reparación del ADN después de la escisión de Cas9 es típicamente aleatoria e impredecible.
- Esto limita su aplicación más allá de la simple interrupción de genes.
Objetivo del estudio:
- Para demostrar la edición predecible y precisa del genoma Cas9.
- Desarrollar un modelo de aprendizaje automático para predecir los resultados de la edición.
Principales métodos:
- Entrenó un modelo de aprendizaje automático, en Delphi, en 2.000 pares de sitios objetivo de ARN y ADN de guía Cas9.
- inDelphi predice los genotipos y las frecuencias de eliminación e inserción.
- Predicciones validadas en líneas celulares humanas y de ratón.
Principales resultados:
- inDelphi predice con precisión los resultados de la edición (r=0,87).
- Se han identificado ARN guía Cas9 que producen una edición precisa (precisa-50) en el 5-11% de los casos.
- Se corrigieron con éxito las mutaciones causantes de la enfermedad en células derivadas del paciente (síndrome de Hermansky-Pudlak, enfermedad de Menkes).
Conclusiones:
- La edición de Cas9 sin plantilla puede ser precisa y predecible.
- inDelphi permite una predicción precisa del genotipo para la edición del genoma.
- Este enfoque facilita la corrección precisa de las enfermedades genéticas.
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