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Updated: Feb 10, 2026
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Genome Editing in Mammalian Cell Lines using CRISPR-Cas
Published on: April 11, 2019
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Evaluación de la edición génica en células CHO utilizando el sistema Cas-CLOVER
Tiffany McLamarrah1, Efecan Aral1, Michael Hoffman1
1Mammalian Platform, Global CMC Development, Framingham, Massachusetts, USA.
Biotechnology progress
|February 8, 2026
Resumen
La edición génica mediante Cas-CLOVER se dirige con precisión al locus de la glutamina sintetasa (GS) en células de ovario de hámster chino (CHO). Esto dio como resultado una mejora significativa en la producción de anticuerpos monoclonales, mostrando un aumento de 14,5 veces en el título.
Área de la Ciencia:
- Biotecnología
- Biología Molecular
- Ingeniería Genética
Sus antecedentes:
- Los huéspedes de ovario de hámster chino (CHO) son cruciales para la producción biofarmacéutica.
- Las tecnologías de edición génica ofrecen métodos avanzados para el desarrollo de líneas celulares huésped.
- La mejora de la estabilidad y la productividad de las células CHO es esencial para una fabricación eficiente.
Objetivo del estudio:
- Emplear la nucleasa programable Cas-CLOVER para la edición génica precisa en células CHO.
- Generar y validar líneas celulares CHO productoras de anticuerpos con eliminación de glutamina sintetasa (GSKO).
- Evaluar el impacto de la eliminación del gen GS en la producción de proteínas recombinantes.
Principales métodos:
- Se utilizó la nucleasa programable Cas-CLOVER para dirigirse al locus de la glutamina sintetasa (GS) en células CHO-K1.
- Se generaron más de cien clones potenciales de eliminación de GS (GSKO) a partir de 30 líneas celulares únicas.
- Los clones GSKO se validaron utilizando tres métodos ortogonales para confirmar la eliminación del gen.
Principales resultados:
- Se confirmó la eliminación completa del gen GS en 98 de los clones GSKO generados.
- La producción de anticuerpos monoclonales utilizando clones GSKO seleccionados mostró una mayor productividad.
- Se observó un aumento significativo en el título, hasta 14,5 veces, en comparación con los huéspedes parentales de tipo salvaje.
Conclusiones:
- La edición génica mediada por Cas-CLOVER es una herramienta eficaz para el desarrollo de líneas celulares huésped CHO mejoradas.
- Las líneas celulares CHO GSKO demuestran una productividad significativamente mejorada para la producción de proteínas recombinantes.
- Este enfoque de edición génica tiene un potencial sustancial para optimizar los procesos de fabricación biofarmacéutica.
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